CN201458938U - Sludge drying and carbonization treatment device - Google Patents

Abstract

A sludge drying and carbonization treatment device. The method mainly solves the problems of high treatment cost, large amount of auxiliary fuel and poor treatment effect of the existing sludge treatment device. It is characterized in that it consists of a drying treatment device and a carbonization treatment device, and the drying treatment consists of a feeding hopper (1), a screw conveyor (2), a first stage dryer (3), a fan (4), and a pump (5) , a combustion furnace (6), a fuel tank (7), a cooling tower (8), a rotary kiln (9), a secondary dryer (10) and a dry substance storage tank (11); Fire type carbonization machine combustion furnace (11), carbonization machine (12), carbide storage tank (13) and condenser (14). The sludge drying and carbonization treatment device has the characteristics of low treatment cost, less auxiliary fuel and good treatment effect, thereby achieving the effect of energy saving and environmental protection.

Description

Sludge drying and carbonization treatment device

Technical field:

The utility model relates to a sludge treatment device, in particular to a sludge drying and carbonization treatment device.

Background technique:

As the urban population continues to grow, so does the amount of sludge generated. Sludge is composed of sediment left over from the sewage treatment process and has a high moisture and organic content, so it is very difficult to deal with. To deal with this kind of activated sludge, it needs to be stabilized first, then dehydrated, and finally disposed of in the following ways. There are many types of sludge disposal technologies, but landfill and incineration have always been the main methods. Although the disposal cost of landfill is not high, the methane (greenhouse effect) and leached water (odor) produced by landfill will cause environmental pollution, and the expansion of landfill is also restricted by many factors, which will make land use more efficient decline. Another commonly used technology is incineration. However, due to the high moisture content of sludge, incineration treatment requires a large amount of auxiliary fuel, which obviously cannot achieve efficient energy use.

Utility model content:

In order to solve the problems of high processing cost, large amount of auxiliary fuel and poor processing effect of the existing sludge treatment device, the utility model provides a sludge drying and carbonization processing device, which has the advantages of low processing cost, auxiliary It has the characteristics of less fuel and good treatment effect, so as to achieve the effect of energy saving and environmental protection.

The technical solution of the utility model is: the sludge drying and carbonization treatment device is composed of a drying treatment device and a carbonization treatment device, and it is characterized in that: the drying treatment consists of a feeding hopper, a screw conveyor, a head dryer, a fan, Pump, combustion furnace, fuel tank, cooling tower, rotary kiln, secondary dryer and dry material storage tank. A screw conveyor is set between the outlet of the feeding hopper and the inlet of the primary dryer. The outlet of the dryer and the inlet of the rotary kiln A screw conveyor is set between the outlet of the rotary furnace and the inlet of the secondary dryer, a screw conveyor is installed between the outlet of the secondary dryer and the inlet of the dry matter storage tank, and the outlet of the dry matter storage tank A screw conveyor is installed between the inlets of the treatment device. The primary dryer is connected to the combustion furnace through pipelines and fans, the fuel tank is connected to the combustion furnace through pipelines and pumps, and the rotary furnace and secondary dryer are connected to the primary dryer through pipelines. The drying machine is connected, and the secondary drying machine is connected with the cooling tower through pipelines and fans; the carbonization treatment device is composed of a flame-spraying carbonization machine combustion furnace, a carbonization machine, a carbide storage tank and a condenser. The inlet of the mechanical combustion furnace is connected with the outlet of the dry material storage tank through the screw conveyor, the flame-spraying carbonization machine combustion furnace is connected with the carbonization machine through the pipeline, the carbonization machine is connected with the carbide storage tank through the pipeline, and the carbonization machine is connected through the pipeline With condenser.

The utility model has the following beneficial effects: the sludge drying and carbonization treatment device adopts the primary drying machine for primary drying, rotary kiln drying, and secondary drying machine for secondary drying. Fully considering the physical properties of sludge at different water contents, In order to make it dry efficiently, different dryers are configured. The drying device is generally composed of a primary dryer, a secondary dryer and a rotary kiln. When the primary dryer is used for primary drying, the moisture content of the sludge is the highest. The high-heat gas discharged from the rotary kiln is directly heated through the center of the first-stage dryer. After that, it is reheated in the combustion furnace again, and then returned to the outside of the first-stage dryer for indirect heating to achieve The purpose of making full use of waste heat resources. After the first drying of the sludge, it enters the next link. It is sent into the rotary furnace through the screw conveyor, and the rotary furnace can directly obtain heat from the combustion furnace. After passing through the rotary furnace, the second When the secondary dryer is drying, the remaining moisture in the sludge will be dried by thermal radiation. The moisture content of the dried sludge is about 20%. In order to further compress the moisture content, a carbonization process is required. Therefore, the sludge The sludge drying carbonization treatment device has the characteristics of low treatment cost, less auxiliary fuel and good treatment effect, so as to achieve the effect of energy saving and environmental protection.

Description of drawings:

Accompanying drawing 1 is the structural representation of the utility model.

In the figure 1-feeding hopper, 2-screw conveyor, 3-first stage dryer, 4-fan, 5-pump, 6-burning furnace, 7-fuel tank, 8-cooling tower, 9-rotary kiln, 10- Secondary dryer, 11-dried material storage tank, 12-flame-type carbonization machine combustion furnace, 13-carbonization machine, 14-carbide storage tank, 15-condenser.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in the accompanying drawings, the sludge drying and carbonization treatment device includes a drying treatment device and a carbonization treatment device. 4. Composed of pump 5, combustion furnace 6, fuel tank 7, cooling tower 8, rotary kiln 9, secondary dryer 10 and dry matter storage tank 11, the sludge stored in the hopper 1 enters from the outlet through the screw conveyor 2 The first drying is carried out in the first stage dryer 3, and the sludge after the first drying enters the rotary kiln 9 through the screw conveyor 2, and the sludge is reheated in the combustion furnace again, and then returned to the first stage dryer 3, indirect heating is carried out to achieve the purpose of making full use of waste heat resources. The sludge heated by the rotary kiln 9 is fed into the secondary dryer 10 through the screw conveyor 2 for secondary drying, and the remaining moisture in the sludge is dried by heat radiation. The dried sludge has a moisture content of about 20%, and a carbonization process is required to further compress the moisture content. The sludge from the secondary dryer 10 enters the dry matter storage tank 11 through the screw conveyor 2 and waits for carbonization treatment. A screw conveyor 2 is set between the outlet of the dry matter storage tank 11 and the inlet of the carbonization treatment device. The first stage dryer 3 is connected to the combustion furnace 6 through a pipeline and a fan 4, and the fuel tank 7 is connected to the combustion furnace 6 through a pipeline and a pump 5. Pass, provide fuel and oxygen for rotary kiln 9 through fan 4 and fuel tank 7. The rotary kiln 9 and the secondary dryer 10 are respectively connected with the first-stage dryer 3 through pipes, and the heat of the rotary furnace 9 is transferred to the first-stage dryer 3 through the pipes, so as to fully utilize the waste heat resources. Secondary dryer 10 is communicated with cooling tower 8 by pipeline and fan 4; Described carbonization treatment device is made up of fire-spraying carbonization machine combustion furnace 12, carbonization machine 13, carbide storage tank 14 and condenser 15, dried matter The dried sludge in the storage tank 11 is sent to the flame-injection carbonization machine combustion furnace 12 for heating through the screw conveyor 2, and the sludge heated by the flame-injection carbonization machine combustion furnace 12 is sent to the carbonization machine 13 through the pipeline for carbonization For processing, the sludge carbonized by the carbonizer 13 is sent into the carbide storage tank 14, and the carbonizer 13 is connected to a condenser 15 through a pipeline.

In actual use, the drying process of the sludge drying and carbonization treatment device is divided into primary drying with 3 first-stage dryers, 9 drying with rotary kiln, and 10 secondary drying with secondary dryers. The physical properties of sludge at different moisture contents are fully considered , Different dryers are configured to make it dry efficiently. The drying device is generally composed of the primary dryer 3, the secondary dryer 10 and a rotary kiln 9. When the primary dryer 3 is used for primary drying, the sludge The moisture content is the highest, and the high-heat gas discharged from the rotary kiln 9 passes through the center of the first-stage dryer 3 for direct heating. After that, it is reheated in the combustion furnace again, and then returned to the first-stage dryer 3 Externally, indirect heating is carried out to achieve the purpose of making full use of waste heat resources. After the first drying, the sludge enters the next link. It is sent into the rotary furnace 9 through the screw conveyor 2, and the rotary furnace 9 can be directly from the combustion furnace obtain heat in. After the rotary kiln 9 is carried out for the second secondary dryer 10, the remaining water in the sludge will be dried by heat radiation. The dried sludge has a moisture content of about 20%. Further compressing the moisture content requires a carbonization process. The dry matter is heated to about 650°C in a closed carbonization machine 13, and the volatile components will be thermally decomposed during the carbonization process. The remaining volatile components will be circulated back to the combustion furnace to be converted into dry And the auxiliary heat source required by the carbonization system. In order to effectively capture the free moisture (water in the void) and inherent moisture (moisture connected with organic matter) generated during the drying process, it is equipped with an anti-odor valve (device for collecting moisture), and at the same time set The combustion furnace protection device and shaft protection device are installed. Because the combustion furnace is heated by direct flame injection, the carbides are in danger of being ignited. In order to avoid the carbides from being ignited and at the same time increase the degree of activation of the carbides (porosity), Therefore, water vapor is used for carbonization. The dry matter can be carbonized in the carbonization machine within 20 minutes. After the sludge is dried, if it is necessary to further reduce its moisture content, it needs to be heated at a temperature above 500°C in a closed space, causing React as follows.

CnHn(organic matter)xCH4+yH2+C(carbon)··············(1)

CH4+H2O CO+3H2···················(2)

Reaction (1) is the reaction of solid (carbon) and volatile gases such as H2, CO, CO2, CH4 when organic waste is heated, and reaction (2) is the reaction of combustible gases that generate CO and H2. After the sludge is dried and carbonized, the generated by-product carbide (carbon) is carbon particles produced at a high temperature above 500°C. It is odorless, has strong air purification and adsorption properties, and its calorific value is about 1500-2500kcal/ kg, which is strongly alkaline. Because of its large specific surface area, it can be used in a wide range of applications. Utilizing the characteristics of strong air purification and adsorption of carbides, it can be used as a high-efficiency treatment agent in sewage treatment plants, and can also be used as activated carbon for purifiers and adsorbents for polluted river water. Using its calorific value, it can be mixed with coke as a carburant for steelmaking; after being mixed with coal, it can be used as auxiliary fuel in plastic sheds; because of its consistent shape, it is easy to pack and transport; because of its Alkaline, carbide with low heavy metal content, can be used as a conditioner for acidic soil, covering soil for landfills, microbial adsorption layer for golf courses or sports fields, etc. The biggest difficulty in sludge drying and carbonization, that is, whether the high moisture content of 70-80% can be effectively reduced is the key to realize sludge drying and carbonization. In Korea, there is already an efficient drying system that can effectively remove moisture, and there are physical projects for inspection.

The sludge drying and carbonization treatment device can remove odor and white smoke without other combustion treatment process or RTO (thermal oxidation) equipment. Most of the dust generated during drying will be adsorbed on the dry matter, so the load on the dust collection facility is small. Micro dust, VOC, etc. are all burned in the radiant heat range (900°C). The primary dryer 3 is once, the rotary kiln 9, and the secondary dryer 10 are arranged in an efficient arrangement structure to solve structural problems such as viscosity that varies with the range of moisture content, surface area relationship, and fire prevention. The primary drying heat source of the primary dryer 3 is composed of recycled direct heat and indirect heat. The drying of the rotary kiln 9 adopts direct spray heating and inlet spraying methods, and the rotary kiln 9 adopts an improved wide-width type and a horizontal type (CarryingFlight mode) structure to increase the surface area of the dried object and the stagnant volume in the air. The heat source for the secondary drying in the secondary dryer 10 is an indirect heat source utilizing residual heat, thereby stabilizing the dried product (uniform mixing and drying). In the carbonization process, the organic matter itself produces dry distillation gas, which can be used as energy in the dry carbonization process, and the final product is carbide. Since part of the organic matter is converted into dry distillation gas, the drying ratio of the final product is 1/3. The carbonization is carried out under high temperature conditions. Considering the thermal change characteristics of the material and the durability of the mechanical equipment, the above devices are set up to maximize the efficiency. change. 1. Maximize the drying effect of raw material moisture - set up a condenser, 2. Specialize the heat transfer channel in order to protect the casing, 3. Install an anti-air injection device to prevent the deformation of the inner shaft of the carbonization furnace, 4. Dry distillation gas combustion and combustion furnace protection 5. The device to prevent the discharge of carbides from being ignited. 6. Features of dry distillation gas dust collection device. It has the value of promotion and application.

Claims (1)

1. sludge drying and carbonizing processing device, comprise by drying process device and carbonization treatment apparatus and forming, it is characterized in that: described drying treatment is by cast hopper (1), screw conveyer machine (2), chopped-off head drying machine (3), fan (4), pump (5), roasting kiln (6), tanks (7), cooling tower (8), rotary kiln (9), secondary drying machine (10) and dry thing storage tank (11) are formed, be provided with screw conveyer machine (2) between cast hopper (1) outlet and chopped-off head drying machine (3) import, be provided with screw conveyer machine (2) between drying machine (3) outlet and rotary kiln (9) import, be provided with screw conveyer machine (2) between rotary kiln (9) outlet and secondary drying machine (10) import, be provided with screw conveyer machine (2) between secondary drying machine (10) outlet and dry thing storage tank (11) import, be provided with screw conveyer machine (2) between dry thing storage tank (11) outlet and the carbonization treatment apparatus import, chopped-off head drying machine (3) is connected with roasting kiln (6) by pipeline and fan (4), tanks (7) is connected with roasting kiln (6) by pipeline and pump (5), rotary kiln (9) and secondary drying machine (10) are connected with chopped-off head drying machine (3) respectively by pipeline, and secondary drying machine (10) is connected with cooling tower (8) by pipeline and fan (4);

Described carbonization treatment apparatus is made up of flame formula carbonization machine roasting kiln (12), carbonization machine (13), carbide storage tank (14) and condenser (15), flame formula carbonization machine roasting kiln (12) import is connected with dry thing storage tank (12) outlet by screw conveyer machine (2), flame formula carbonization machine roasting kiln (12) is connected with carbonization machine (13) by pipeline, carbonization machine (13) is connected with carbide storage tank (14) by pipeline, and carbonization machine (13) is connected with condenser (15) by the pipeline road.

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