CN211198976U - Sludge drying equipment - Google Patents

Abstract

The utility model relates to a sludge drying equipment, which belongs to the field of environmental protection equipment. The sludge input funnel is connected with the sludge transmission belt, and the sludge transmission belt is connected with the sludge crushing and stirring device; the sludge crushing and stirring device is connected with the first drying device, and the first drying device is connected with the second drying device; the medium oil heating device is connected with the oil The sludge input port 1, the pump 2 and the medium oil separator are connected, the medium oil heating device is connected with the first drying device; the steam generator is connected with the first and second drying devices; the first drying device is connected with the second drying device , the second drying device is connected with the medium oil separator; the medium oil separator is connected with the medium oil evaporator, the medium oil evaporator is connected with the dried sludge transmission belt, and the ton bag is placed under the dried sludge transmission belt. The advantages are: novel conception, simple structure, safe and convenient use, and high work efficiency. Effectively remove moisture in sludge and garbage, shorten drying time, and effectively improve drying efficiency.

Description

Sludge drying equipment

technical field

The utility model relates to the field of environmental protection equipment, in particular to a sludge drying equipment. It can effectively remove the moisture in organic sewage sludge, livestock wastewater sludge, kitchen waste, effectively shorten the sludge drying time and improve the drying efficiency.

Background technique

With the gradual increase in the amount of sewage and sewage sludge, kitchen waste, livestock wastewater and sludge generated by industries, cities and rural areas, the scale of treatment plants for these sludge and garbage is also increasing. The amount of sludge treated by treatment plants is also increasing. At present, most of the sludge treated in these treatment plants is processed by landfill, incineration or marine disposal. Marine disposal has been banned by various countries due to its marine pollution and destruction of marine ecology. Therefore, the treatment of sludge The program becomes a difficult problem. At the same time, it is also studying the scheme that can effectively treat the sludge and effectively reduce the moisture content of the sludge.

There are two general drying techniques for sludge. One is the direct drying method that directly dries the sludge through combustion gas; the second is the indirect drying method that uses the combustion gas to heat the hot plate and then dries the sludge. The direct drying method is a method of drying the high-temperature combustion gas directly in contact with the sludge. It has advantages in efficiency compared with the indirect drying method, and the equipment structure is relatively simple. Two major problems require the addition of large-scale processing equipment. On the contrary, the indirect drying method is to use the high-temperature combustion gas to heat the hot plate, and then use the heated hot plate to dry the sludge. The structure of this equipment is that the transportation channel of the combustion gas and the sludge is separated. Odors and dust may also occur during the process. In addition, since the indirect drying method cannot transmit the heat of the hot plate to the inside of the sludge, there is a problem that the drying efficiency is relatively low. When the sludge contacts the high-temperature hot plate, only the part of the sludge that directly contacts the hot plate evaporates the water first. At this time, an air layer occurs in the water during the gasification process. These air layers attached to the surface of the sludge hinder the heat. Sludge conveyed to the inside.

To sum up, the direct drying method is excellent in terms of drying efficiency, but there are hidden dangers of odor and dust. When dealing with a large amount of sludge, a lot of equipment needs to be added, and the cost also increases. The indirect drying method cannot overcome the drying characteristics in terms of technology, and the drying efficiency is also very low, requiring a lot of fuel and time. Urgent improvement.

Utility model content

The purpose of the present utility model is to provide a sludge drying device, which solves the above-mentioned problems existing in the prior art. The utility model can effectively remove the moisture of organic sewage sludge, livestock waste sludge and kitchen waste without odor and dust, shorten the drying time and improve the drying efficiency.

The above-mentioned purpose of the present utility model is achieved through the following technical solutions:

Sludge drying equipment, the sludge input funnel 3 is connected with the sludge transmission belt 4, and the sludge transmission belt 4 is connected with the sludge crushing and stirring device 5; the sludge crushing and stirring device 5 is connected with the first drying device 6, and the first drying device 6 is connected with The second drying device 7 is connected; the upper left side of the medium oil heating device 2 is respectively connected with the oil sludge input port 1 5-1, the second pump 17 and the medium oil separator 8, and the lower right side of the medium oil heating device 2 is connected with the first The drying device 6 is connected; the steam generator 1 is connected with the first drying device 6 and the second drying device 7; the first drying device 6 is connected with the second drying device 7, and the second drying device 7 is connected with the medium oil separator 8 Connection; the medium oil separator 8 is connected with the medium oil evaporator 9, the medium oil evaporator 9 is connected with the dried sludge transmission belt 10, and the ton bag 20 is placed under the dried sludge transmission belt 10.

The middle and upper side of the medium oil evaporator 9 is connected with the lower left side of the centrifugal separator 13, and the upper right side of the centrifugal separator 13 is connected with the bottom of the moisture removal condenser 12, and the upper left side of the moisture removal condenser 12 is connected with the pump three 19. And the steam outlet of the second drying device 7 is connected, the lower left side of the moisture-removing condenser 12 is connected with the pipeline of the medium oil evaporator 9 and the dried sludge transmission belt 10, and the top of the moisture-removing condenser 12 is connected with the blower two 22 .

The middle and lower part of the dried sludge transmission belt 10 is connected with the left side of the furnace 11, the right side of the furnace 11 is connected with the blower 1 21, the left side of the steam condensing tank 14 is connected with the pump 1 16, and the steam condensing tank 14 The top is connected with the steam generator 1 and the second valve 18 .

The sludge crushing and stirring device 5 is provided with an oil sludge input port 1 5-1 on both sides of the top, and a steam injection port 1 5-3 and a steam inlet and outlet 2 5-4 on the upper side, which are respectively connected with the steam interlayer 1. 5-12. The steam interlayer 2 is connected to 5-13, the bottom left of the sludge crushing and stirring device 5 is connected to the steam outlet 5-5, the right side is connected to the steam outlet 2 5-6, the steam outlet 1 5-5 and There is a residual oil sludge drain pipe 5-14 for maintenance between the steam outlet 2 5-6; an engine 5-9 and a reducer 5-10 are installed on the top of the sludge crushing and stirring device 5 to drive the rotating shaft 1 5-11; The interior of the mud crushing and stirring device 5 is centered on the rotating shaft 1 5-11, the lower part is connected to the pulverizer 5-8, the middle is connected to the mixer 5-7, and the upper part is connected to the oil sludge discharge port 1 5-2.

The upper right side of the first drying device 6 is provided with an oil sludge input port 2 6-1, the middle and upper side is provided with a medium oil input port 6-4, the upper left side is provided with a water evaporation outlet 6-3, and the lower left side is provided with an outlet 6-3. Oil sludge discharge port two 6-2; the two sides of the first drying device 6 are equipped with rotating shaft two 6-9 of the rotating drum, the first drying tank 6-5 and the second drying tank 6 inside the first drying device 6 -6 connection, there are steam interlayer 3 6-7 and steam interlayer 4 6-8 in the upper and lower outer walls.

The medium oil evaporator 9 has an oil sludge input port 3 9-1 on the upper right side, an oil vapor discharge port 9-4 on the upper left side, an oil sludge discharge port 3 9-2 on the lower left side, and an oil sludge discharge port 9-2 on the lower right side. The steam injection port 3 9-5 has a steam flow channel 9-3 inside, and the bottommost is connected to the pillar 9-6 supporting the medium oil evaporator 9. side and supported by struts 9-6.

The beneficial effects of the utility model are: novel conception, simple structure, safe and convenient use, and high work efficiency. After the medium oil and the sludge are fully stirred by the mixer, the oil sludge is fully pulverized by the pulverizer to increase the contact surface with the heated heat medium oil, which can effectively remove the moisture in the sludge and shorten the drying time. to improve drying efficiency. It can effectively remove the moisture in organic sludge, livestock wastewater sludge, and kitchen waste, shorten the drying time, and effectively improve the drying efficiency.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention, and constitute a part of the present application.

Fig. 1 is the overall structure schematic diagram of the present utility model;

Fig. 2 is the structural representation of the sludge crushing and stirring device of the utility model;

3 is a schematic structural diagram of the first drying device of the present invention;

4 is a schematic structural diagram of the medium oil evaporator of the present invention.

In the figure: 1. Steam generator; 2. Medium oil heating device; 3. Sludge input funnel; 4. Sludge conveyor belt; 5. Sludge crushing and stirring device; 6. First drying device, 7. Second drying device , 8, medium oil separator; 9, medium oil evaporator, 10, dried sludge transmission belt; 11, furnace; 12, water removal condenser; 13, centrifugal separator; 14, steam condensation tank; 15, valve one ;16, pump one; 17, pump two; 18, valve two; 19, pump three; 20, ton bag; 21, blower one; 22, blower two, 5-1, oil sludge input port one; 5-2 , oil sludge discharge port one; 5-3, steam injection port one; 5-4, steam injection port two; 5-5, steam discharge port one; 5-6, steam discharge port two; 5-7, mixer; 5-8, pulverizer; 5-9, engine; 5-10, reducer; 5-11, rotating shaft one; 5-12, steam interlayer one; 5-13, steam interlayer two; 5-14, maintenance Residual oil sludge discharge pipe, 6-1, oil sludge input port 2; 6-2, oil sludge discharge port 2; 6-3, water evaporation discharge port; 6-4, medium oil input port; 6-5 , the first drying tank; 6-6, the second drying tank; 6-7, the steam interlayer three; 6-8, the steam interlayer four; 6-9, the rotating shaft two, 9-1, the oil sludge input port three; 9-2, oil sludge discharge port three; 9-3, steam flow channel; 9-4, oil vapor discharge port; 9-5, steam injection port three; 9-6, pillar; 9-7, screw conveyor .

Detailed ways

The details of the present utility model and specific implementations thereof will be further described below in conjunction with the accompanying drawings.

Referring to Fig. 1, Fig. 2, Fig. 3, the sludge drying equipment of the present utility model performs oil evaporation and drying on the sludge with a moisture content of 80% through a predetermined process, including a steam generator 1, a medium oil heating device 2, Sludge input funnel 3, sludge conveyor 4, sludge crushing and stirring device 5, first drying device 6, second drying device 7, medium oil separator 8, medium oil evaporator 9, dried sludge conveyor belt 10, furnace 11. Moisture removal condenser 12, centrifugal separator 13, steam condensation tank 14, valve one 15, pump one 16, pump two 17, valve two 18, pump three 19, ton bag 20, blower one 21, blower two 22.

The bottom of the sludge input funnel 3 is connected to the upper right input port of the sludge transmission belt 4 for adjusting the sludge input amount, and the lower left discharge port of the sludge transmission belt 4 is connected to the oil sludge input port of the sludge crushing and stirring device 5. 5-1 is connected; the oil sludge discharge port one 5-2 of the sludge crushing and stirring device 5 is connected with the oil sludge input port two 6-1 of the first drying device 6, and the oil sludge discharge port of the first drying device 6 is connected The second 6-2 is connected with the sludge input port of the second drying device 7; the upper left side of the medium oil heating device 2 is respectively connected with the oil sludge input port one 5-1, the pump two 17 and the medium oil of the sludge crushing and stirring device 5 The separator 8 is connected, the lower right side of the medium oil heating device 2 is connected with the medium oil input port 6-4 of the first drying device 6; the steam generator 1 is connected with the first drying device 6 and the second drying device 7, Valve one 15 and valve two 18 are installed in the steam generator 1; the oil sludge discharge port two 6-2 of the first drying device 6 is connected with the sludge input port of the second drying device 7. The sludge discharge port is connected with the medium oil separator 8; the lower right side of the medium oil separator 8 is connected with the upper left side of the medium oil evaporator 9, and the lower right side of the medium oil evaporator 9 is connected with the dried sludge transmission belt 10 The upper right side is connected to the upper right side of the dried sludge transmission belt 10, and the ton bag 20 is placed at the lower left side of the dried sludge transmission belt 10 for storing the dried sludge; the upper middle side of the medium oil evaporator 9 is connected to the lower left side of the centrifugal separator 13, The upper right side is connected with the bottom of the moisture removal condenser 12, the upper left side of the moisture removal condenser 12 is connected with the steam outlet of the pump three 19 and the second drying device 7, and the lower left side of the moisture removal condenser 12 is connected with the medium oil evaporator 9. It is connected with the pipeline of the dried sludge transmission belt 10, and the top of the moisture-removing condenser 12 is connected with the second blower 22; the middle and lower part of the dried sludge transmission belt 10 is connected with the left side of the furnace 11, and the right side of the furnace 11 is connected with the blower One 21 is connected, the left side of the steam condensing tank 14 is connected with the pump one 16, and the top of the steam condensing tank 14 is connected with the steam generator 1 and the second valve 18.

The steam generator 1 is used to provide steam to indirectly heat the medium oil and maintain the heat lost during the drying process. The medium oil heating device 2 is used to heat the medium oil and provide the medium oil to the drying device. The sludge input funnel 3 is used for sludge input. The sludge conveyor belt 4 is used to adjust the amount of sludge and transfer the sludge. The sludge pulverizing and stirring device 5 is used for stirring and pulverizing the sludge and the medium oil by high-speed rotation. The first drying device 6 is used to remove foam generated when evaporating moisture and chemicals in sludge, and to remove moisture from sludge. The second drying device 7 is used to remove the sludge moisture, and can reduce the sludge moisture content to 1% or less. The first drying device 6 has the same structure as the second drying device 7 . The medium oil separator 8 is used to separate the medium oil and the sludge, and the low-speed rotation adjusts the oil content of the sludge to below 80%. The medium oil evaporator 9 is used to indirectly heat the oil sludge with an oil content of 80% to reduce the oil content to below 10%. The dried sludge conveyor 10 is used to discharge the dried sludge, and at this time, the high-temperature sludge is lowered to normal temperature with condensed water and then discharged. The furnace 11 provides heat for removing the oil in the sludge. The moisture removal condenser 12 is used to evaporate the remaining moisture in the medium oil. The centrifugal separator 13 is used to remove the residual sludge in the medium oil. The steam condensation tank 14 is a device for recovering the high-temperature water after heat exchange, and the water recovered by this device is reused for the steam boiler.

After the organic sludge is input through the sludge input funnel 3, it is transferred to the sludge crushing and stirring device 5 by the conveyor belt 4 at the bottom of the sludge input funnel. The sludge put into the sludge pulverizing and stirring device 5 and the medium oil heated by steam are stirred and pulverized and heated repeatedly, and the oil sludge is pulverized by the sludge pulverizing and stirring device 5 to a certain extent, and then put into the first in drying unit 6. At this time, the medium oil heated by the medium oil heating device 2 needs to be supplemented to supplement the heat lost due to the evaporation of water. The oil sludge heated to 170 degrees in the first drying device 6 evaporates the moisture in the sludge through the second drying device 7, and then is put into the medium oil separator 8, and the medium oil and sewage are separated and discharged by the medium oil separator 8. mud. At this time, the oil content of the discharged sludge is more than 80%, and the sludge with an oil content of more than 80% is discharged through the medium oil evaporator 9 to reduce the oil content, and the medium oil evaporator 9 reduces the oil content to less than 15%. The medium oil evaporator 9 uses external heat to evaporate the oil in an indirect drying manner. The furnace 11 uses gas or medium oil to provide heat for the medium oil evaporator 9 . The dried sludge is discharged through the sludge conveyor 10, and the discharged sludge can be stored using the big bag 20 or the like. The moisture removal condenser 12 is a device for condensing water vapor. At this time, the condensed moisture will contain some oil, so the medium oil and sludge are separated by the sludge centrifugal separator 13, and the separated medium oil is then put into the medium oil. In the circulation pipe, the separated sludge will be put into the sludge discharge pipe.

When the organic sludge fed into the first drying device 6 reacts with the high-temperature oil, the internal moisture condensed by the condensing agent will not be locked, so it is necessary to use the pulverizers 5-8 at the bottom of the first drying device 6 for pulverization, which can shorten the time. drying time. The pedal on the upper part of the mixer 5-7 of the first drying device 6 can flow the input sludge in the oil to the bottom of the first drying device 6, and then flow along the wall surface, which can speed up the heat transfer efficiency. And the air bubbles generated by the coagulant are eliminated by touching the air when moving to the discharge port. The second drying device 7 is different from the general unidirectional type conveyor belt. First, the first flow is carried out through the inner pipe, and the second time, the second flow is carried out through the external spiral conveyor belt, which prolongs the sludge retention time, so it can be designed to be miniaturized. equipment. The medium oil separator 8 uses a centrifugal separator, and separates sludge and oil through this process. The medium oil evaporator 9 evaporates the medium oil by indirect heating of the sludge with an oil content of 65% to 80%, and reduces the oil content in the sludge to 10% to 15%. The medium oil evaporator 9 is designed as a multi-layer conveyor belt, so the amount of dry sludge can be adjusted at will.

Referring to FIG. 2 , the sludge crushing and stirring device 5 of the present invention includes an oil sludge input port 1 5-1, an oil sludge discharge port 1 5-2, a steam injection port 1 5-3, and a steam injection port 2 5 -4, steam outlet 1 5-5, steam outlet 2 5-6, mixer 5-7, pulverizer 5-8, engine 5-9, reducer 5-10, rotating shaft 1 5-11, steam interlayer One 5-12, steam interlayer two 5-13, residual oil sludge drain pipe 5-14 for maintenance.

The top two sides of the sludge crushing and stirring device 5 are provided with an oil sludge input port 1 5-1, and the upper side is provided with a steam injection port 1 5-3 and a steam inlet and outlet 2 5-4, which are respectively connected with the steam interlayer 1 5. -12. The second steam interlayer 5-13 is connected, the bottom left of the sludge crushing and stirring device 5 is connected to the steam outlet 1 5-5, the right side is connected to the steam outlet 2 5-6, the steam outlet 1 5-5 and the steam outlet There is a residual oil sludge drain pipe 5-14 for maintenance between the discharge ports 2 5-6; an engine 5-9 and a reducer 5-10 are installed on the top of the sludge crushing and stirring device 5 to drive the rotating shaft 1 5-11; The inside of the pulverizing and stirring device 5 is centered on the rotating shaft 1 5-11, the lower part is connected with the pulverizer 5-8, the middle is connected with the mixer 5-7, and the upper part is connected with the oil sludge discharge port 1 5-2.

When in use, the mixer 5-7 is used to forcibly circulate the input oil sludge from the upper part to the lower part, the oil sludge input through this equipment flows to the direction of the pulverizer 5-8, and the medium oil passes through the outer wall steam pipe for heat exchange and then flows to the lower part. External discharge. The pulverizer 5-8 is used to pulverize the oil sludge stirred by the mixer into particles of a certain size. Engines 5-9 are used to provide power. Reducer 5-10 is used to control sludge crushing and fluid flow speed.

The working process of the sludge pulverizing and stirring device 5 is as follows: the sludge and medium oil with a moisture content of more than 80% are put into the oil sludge input port-5-1, and the put-in sludge and medium oil are passed through the mixer 5-7. The centrifugal force flows downward, and the sludge flowing to the lower part of the tank is pulverized by the pulverizers 5-8, and at the same time, the temperature is increased through the steam pipe on the wall surface and flows upward along the wall surface. The oil sludge flowing upward is discharged through the oil sludge discharge port one 5 - 2 and flows to the first drying device 6 . The steam used at this time is injected into steam through steam injection port 1 5-3 and steam injection port 2 5-4 and maintains the temperature of 200 degrees, and the condensed water condensed after heat exchange passes through steam outlet 1 5-5 and steam outlet. Two 5-6 discharge and flow to the boiler for reuse.

The sludge crushing and stirring device 5 is designed with an upper and lower structure with the mixer shaft as the center. The mixer 5-7 in the upper half can move the sludge to the lower half, and the sludge moved to the lower part is pulverized into fine particles by the pulverizer 5-8 at the bottom. The sludge pulverized into fine particles can easily and fully remove the moisture inside the sludge and minimize the drying time. The sludge pulverized by the bottom pulverizer 5-8 is rapidly dried through the steam interlayer 1 5-12 and the steam interlayer 5-13 and evaporates the internal moisture. At this time, the air bubbles generated by the coagulant will move to the discharge tank and be eliminated.

The steam discharge port 1 5-5 and the steam discharge port 2 5-6 in the sludge crushing and stirring device 5 are designed to make it easier to eliminate air bubbles, the bottom is designed as an open structure, and a circular shape is installed in the discharge tank. perforated plate.

Referring to Figure 3, the first drying device 6 includes an oil sludge input port 2 6-1, an oil sludge discharge port 2 6-2, a water evaporation discharge port 6-3, and a medium oil input port 6-4 , the first drying tank 6-5, the second drying tank 6-6, the steam interlayer three 6-7, the steam interlayer four 6-8, the rotating shaft two 6-9, the upper right side of the first drying device 6 is provided with Oil sludge input port 2 6-1, medium oil input port 6-4 on the upper middle side, water evaporation discharge port 6-3 on the upper left side, and oil sludge discharge port 2 6-2 on the lower left side; the first drying The two sides of the device 6 are equipped with rotating shafts 6-9 of the rotating drum, the first drying tank 6-5 inside the first drying device 6 is connected with the second drying tank 6-6, and there are steam interlayers 6-6 in the upper and lower outer walls. 7 and steam sandwich four 6-8.

The water evaporation discharge port 6-3 is used to discharge the water in the evaporated sludge. The medium oil input port 6-4 is used to continuously input high-temperature medium oil, and maintain the internal temperature of 170 degrees. The first drying tank 6-5 is a double-structured first drying tank, and maintains the temperature according to the external medium oil. The second drying tank 6-6 conducts heat exchange with external steam to maintain the temperature, and the steam interlayer 3 6-7 and the steam interlayer 4 6-8 are used to supply 200 degree steam and maintain the internal temperature.

The working process of the first drying device 6 is as follows: the sludge and medium oil pulverized by the sludge pulverizing and stirring device 5 are put into the first drying tank 6-5 through the oil sludge input port 2 6-1 and once in the first drying tank 6-5. Evaporation, the sludge after primary evaporation is subjected to secondary evaporation by means of indirect heat exchange through the steam on the outer wall surface of the second drying tank 6-6. The primary and secondary cross heat exchange evaporation method shortens the length of the equipment and minimizes the installation area and production cost. The sludge evaporated by the secondary heat exchange is discharged together with the medium oil through the oil sludge discharge port 2 6 - 2 , and the discharged oil sludge is separated by the medium oil separator 8 . The heat required for evaporating water is provided by 200-degree steam in steam jacket three 6-7 and steam jacket four 6-8.

The first drying device 6 increases the residence time by a factor of 2 through the internal pipeline. The sludge passing through the first drying tank 6-5 needs to stay in the oil for about 15 minutes, and a larger drying device is required to achieve the target time. As a result, the primary flow is carried out through the internal pipes of the equipment, and the secondary flow is carried out in the opposite direction through the conveyor, which increases the residence time by a factor of two, thereby simplifying the structure of the equipment.

4, the medium oil evaporator 9 includes an oil sludge input port 9-1, an oil sludge discharge port 9-2, a steam flow channel 9-3, an oil vapor discharge port 9-4, Steam injection port three 9-5, pillar 9-6, screw conveyor 9-7.

The medium oil evaporator 9 has an oil sludge input port 9-1 on the upper right side, an oil vapor discharge port 9-4 on the upper left side, an oil sludge discharge port 9-2 on the lower left side, and a steam outlet on the lower right side. The injection port 3 9-5 has a steam flow channel 9-3 inside, and the bottom is connected to the pillar 9-6 supporting the medium oil evaporator 9, and the two ends of the screw conveyor 9-7 are installed on both sides of the medium oil evaporator 9 and supported by pillars 9-6.

The working process of the medium oil evaporator 9 is as follows: the oil sludge with an oil content of about 80% discharged from the second drying device 7 is put into the medium oil evaporator 9 through the oil sludge input port 3 9-1. It flows at low speed over a period of 2 hours and evaporates indirectly by external steam. The external steam is heated and provided by a gas furnace, and the heat is transferred to the outer wall of the rotary flow of the sludge through the steam flow channel 9-3 inside the equipment to evaporate the oil in the sludge. Each layer of the medium oil evaporator 9 is an independent design structure, and the equipment can be added according to the sludge treatment capacity.

The medium oil evaporator 9 indirectly heats the oil sludge with an oil content of 80% to reduce the oil content to below 10%. And the screw conveyor is designed with multiple layers in structure, which can be arbitrarily increased according to the sludge treatment capacity.

The above descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made to the present utility model shall be included within the protection scope of the present utility model.

Claims (6)

1. A sludge drying equipment which is characterized in that: the sludge feeding funnel (3) is connected with a sludge transmission belt (4), and the sludge transmission belt (4) is connected with a sludge crushing and stirring device (5); the sludge crushing and stirring device (5) is connected with the first drying device (6), and the first drying device (6) is connected with the second drying device (7); the left upper side of the medium oil heating device (2) is respectively connected with the first oil sludge feeding port (5-1), the second pump (17) and the medium oil separator (8), and the right lower side of the medium oil heating device (2) is connected with the first drying device (6); the steam generator (1) is connected with the first drying device (6) and the second drying device (7); the first drying device (6) is connected with the second drying device (7), and the second drying device (7) is connected with the medium oil separator (8); the medium oil separator (8) is connected with the medium oil evaporator (9), the medium oil evaporator (9) is connected with the dried sludge transmission belt (10), and the ton bag (20) is arranged below the dried sludge transmission belt (10).

2. The sludge drying apparatus according to claim 1, wherein: the middle upper side of the medium oil evaporator (9) is connected with the left lower side of the centrifugal separator (13), the right upper side of the centrifugal separator (13) is connected with the bottom of the moisture removal condenser (12), the left upper side of the moisture removal condenser (12) is connected with the third pump (19) and a steam discharge port of the second drying device (7), the left lower side of the moisture removal condenser (12) is connected with the medium oil evaporator (9) and a pipeline of a dried sludge transmission belt (10), and the top of the moisture removal condenser (12) is connected with the second blower (22).

3. The sludge drying apparatus according to claim 1 or 2, characterized in that: the middle lower part of the dried sludge transmission belt (10) is connected with the left side of the furnace (11), the right side of the furnace (11) is connected with a first blower (21), the left side of the steam condensation tank (14) is connected with a first pump (16), and the top of the steam condensation tank (14) is connected with a steam generator (1) and a second valve (18).

4. The sludge drying apparatus according to claim 1, wherein: the device is characterized in that a first oily sludge feeding port (5-1) is arranged on each of two sides of the top of the sludge crushing and stirring device (5), a first steam injection port (5-3) and a second steam outlet and outlet (5-4) are arranged on the upper side of the sludge crushing and stirring device and are respectively connected with a first steam interlayer (5-12) and a second steam interlayer (5-13), a first steam outlet (5-5) is connected to the left side of the bottom of the sludge crushing and stirring device (5), a second steam outlet (5-6) is connected to the right side of the bottom of the sludge crushing and stirring device, and a residual oily sludge discharge pipe (5-14) for maintenance is arranged between the first steam outlet (; an engine (5-9) and a speed reducer (5-10) are arranged at the top of the sludge crushing and stirring device (5) to drive a first rotating shaft (5-11); the inside of the sludge crushing and stirring device (5) takes a rotating shaft I (5-11) as a center, the lower part is connected with a crusher (5-8), the middle part is connected with a stirrer (5-7), and the upper part is connected with an oil sludge discharge port I (5-2).

5. The sludge drying apparatus according to claim 1, wherein: the right upper side of the first drying device (6) is provided with a second oily sludge feeding port (6-1), the middle upper side is provided with a medium oil feeding port (6-4), the left upper side is provided with a moisture evaporation discharge port (6-3), and the left lower side is provided with a second oily sludge discharge port (6-2); two sides of the first drying device (6) are provided with a second rotating shaft (6-9) of the rotating drum wheel, a first drying groove (6-5) in the first drying device (6) is connected with a second drying groove (6-6), and a third steam interlayer (6-7) and a fourth steam interlayer (6-8) are arranged in the upper outer wall and the lower outer wall.

6. The sludge drying apparatus according to claim 1, wherein: the right upper side of the medium oil evaporator (9) is provided with an oil sludge feeding port III (9-1), the left upper side is provided with an oil steam outlet (9-4), the left lower side is provided with an oil sludge outlet III (9-2), the right lower side is provided with a steam injection port III (9-5), a steam flow channel (9-3) is arranged in the middle, the lowest part is connected with a support column (9-6) for supporting the medium oil evaporator (9), and two ends of a spiral conveyer (9-7) are arranged on two sides of the medium oil evaporator (9) and are supported by the support column (9-6).

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