CN102815852A - Complete processing unit for sludge drying - Google Patents

Abstract

The invention relates to a complete treatment device for sludge drying, which belongs to the field of environmental protection. The invention comprises a scraper type sludge dryer, a distributed feeding device, a tail gas cooling tower, and sludge incineration equipment; the upper end of the scraper type sludge dryer is connected with the tail gas cooling tower, and the lower end is connected with the sludge incineration equipment, and the distributed feeding The device is installed on the scraper sludge dryer. The invention has the advantages of simple structure, good drying effect, uniform drying, good product quality, low cost, environmental protection, integrated treatment of sludge and high production efficiency.

Description

A complete set of sludge drying treatment device

technical field

The invention relates to a sludge drying treatment device, in particular to a sludge drying complete treatment device, which belongs to the field of environmental protection.

Background technique

Sludge mainly appears in sewage treatment plants and is the main by-product after sewage treatment. The amount of sludge is very large and difficult to handle. This makes people in the water treatment industry very troubled. Only the amount of sludge produced by domestic sewage treatment in my country It has reached hundreds of millions of tons. In addition, my country's economic level has developed rapidly recently, and a large number of industries have been put into production, followed by a large amount of industrial sludge, such as papermaking sludge, printing and dyeing sludge, leather sludge, Oil sludge and so on. Sludge has the characteristics of high water content and complex components. Sludge generally contains lost valuable raw materials and latent heat, and at the same time enriches high concentrations of heavy metals and other pollutants. If the traditional method of direct incineration is used to treat high water content For sludge treatment, it is necessary to concentrate, digest, adjust, dehydrate the sludge, and then incinerate or landfill it. Such treatment of sludge will cause the loss of valuable raw materials and other available resources contained in the sludge, which will seriously affect the environment. At present, the method of mechanical drying is generally used to treat sludge, and the sludge is dried through a dryer, and then the dried sludge is recycled and incinerated, but the effect of mechanical dehydration treatment is not very ideal. It caused some troubles in the transportation process, such as the volume is still very large, the water content is still high, and so on.

After further treatment, the dried sludge has a wide range of uses. For example, it can be used as compound fertilizer in the agricultural field after anaerobic digestion, and can be used as landscape greening in the forestry field after composting. It can also be synthesized It can be used in the field of building materials as building materials or road paving. Therefore, after the sludge is dried by a dryer, valuable components such as raw materials and potential heat in the sludge can be recycled and reused. To reduce the consumption of incineration sludge and environmental pollution, that is to say, sludge drying is an important step to make sludge a usable resource, and there are currently four main types of equipment for sludge drying, namely rotary kiln sludge Dryer, fluidized bed sludge dryer, paddle sludge dryer, disc dryer, etc. Most of the above types of equipment have shortcomings such as heavy paste, poor quality of dried materials, and low efficiency. The disc dryers sold in the market also have shortcomings such as high energy consumption and low efficiency.

Contents of the invention

The object of the present invention is to provide a complete set of sludge drying treatment device with simple structure, good drying treatment effect, high efficiency, environmental protection, energy saving, and capable of realizing integrated treatment of sludge.

The present invention is realized according to the following technical solutions: a complete set of sludge drying treatment device, including a scraper type sludge dryer 1, a distributed feeding device 2, an exhaust cooling tower 12, and sludge incineration equipment 23; a scraper type sludge drying The upper end of the machine 1 is connected to the tail gas cooling tower 12, and the lower end is connected to the sludge incineration equipment 23. The decentralized feeding device 2 is installed on the scraper type sludge dryer 1.

The scraper type sludge dryer 1 includes a safety valve 8, a motor 9, a circular plate 19, a cylinder 20, a front scraper 21, and a reverse scraper 22; the cylinder 20 of the scraper type sludge dryer 1 is installed with The rotating shaft 10, the motor 9 is installed above the rotating shaft 10, the safety valve 8 is placed on the upper end of the barrel 20 of the scraper type sludge dryer 1, the positive scraper 21 and the reverse scraper 22 are placed on the rotating shaft 10, and the scraper type sludge is dried Both sides of the barrel 20 of the machine 1 are provided with steam connecting pipes 7, the steam connecting pipes 7 are connected to the sludge incineration equipment 23, the top of the barrel 20 is provided with an exhaust gas outlet 11, and the lower end is provided with a vent 5 close to the sludge incineration equipment 23 , the circular plate 19 is connected to the steam communication pipe 7, and the lower side of the cylinder 20 of the scraper type sludge dryer 1 is provided with a discharge port 6.

The distributed feeding device 2 is provided with a feeding main pipe 3 and a dispersed feeding port 4 , and the dispersed feeding port 4 passes through the cylinder body 20 and leads to the circular plate 19 .

The tower wall of the tail gas cooling tower 12 has two layers, the inner layer is the tail gas channel, and the outer layer is the sludge channel, and the sludge passes through the tail gas cooling tower 12 before reaching the feed port 4 . The upper side of the outer layer of the tail gas cooling tower 12 is provided with a sludge inlet 13, the other side is provided with a surplus sludge outlet 14, the upper side of the inner layer is provided with a condensed tail gas outlet 16, and the lower side is provided with a tail gas inlet 15, condensed outlet The water outlet 17 and the condensation water outlet 17 are provided with a water outlet switch 18 . The top cover on the upper part of the cylinder 20 adopts the shape of a circular pointed top, and the circular flat plate 19 is hollow and original, with high surroundings and low middle. The tail gas outlet 11 of the cylinder body 20 is connected with the tail gas inlet 15 of the tail gas cooling tower 12 . The excess sludge outlet 14 is connected to the main feeding pipe 3 on the dispersed feeding device 2 .

There is a certain gap between the circular flat plate 19 and the positive scraper 21 and the reverse scraper 22. The positive scraper 21 and the reverse scraper 22 have different functions. The positive scraper 21 mainly spreads the sludge on the circular flat plate. 19, the anti-scraper 22 scrapes up the dried sludge and falls off to the center, and enters the sludge incinerator 23. The sludge incineration equipment 23 mainly incinerates the dried sludge to provide heat for the entire sludge drying equipment, and provides sufficient oxygen to the sludge incineration equipment 23 through the vent 5 .

The working principle is: the remaining sludge enters the dispersed feed ports 4 from the main feed pipe 3, and the dispersed feed ports 4 pass into the side of the circular flat plate 19. With the rotation of the motor 9, the intermediate shaft 10 and the rotating shaft 10 are driven. The positive scraper 21 and the reverse scraper 22 rotate together. The positive scraper 21 mainly flattens the excess sludge coming in from the dispersion feed port 4, and dries the flattened excess sludge through the high temperature of the circular flat plate 19. After dehydration, the anti-scraper 22 symmetrical to the positive scraper 21 scrapes off the ideal residual sludge that has been dried. The scraping process is carried out from the surrounding to the middle, and finally the dried sludge of each circular plate 19 All the mud falls from the middle and falls into the sludge incineration equipment 23 located at the lower part. Through the ventilation of the vent 5, the dried sludge is continuously incinerated to generate a large amount of steam. The steam is connected by the steam connecting pipe 7 and the circular plate 19 In the same way, heat is provided to the entire sludge drying device through steam. If the pressure in the steam system is too high, it will be automatically discharged by the upper safety valve 8 to ensure the stability of the pressure in the steam system. Repeatedly , so that the entire system continues to run. During the sludge drying process, due to the large amount of moisture in the remaining sludge, the moisture content of the entire system is very high, and a large amount of tail gas with high humidity will be generated. The tail gas is discharged through the tail gas outlet 11 and enters the tail gas cooling tower 12. The tail gas cooling tower 12 is to cool the remaining sludge before entering the feed main pipe 3, so that in addition to cooling, it can also increase the initial temperature of the feed, which is convenient for improving the system efficiency. After the tail gas is condensed, the condensed water is condensed The water outlet 17 is discharged and returned to the front end of the sewage treatment plant for treatment by the sewage treatment plant, and the condensed tail gas enters the tail gas treatment device through the condensed tail gas outlet 16 for treatment.

The present invention has the following beneficial effects:

1. Simple structure, good drying effect, uniform drying, good product quality and low cost;

2. Continuous drying realizes integrated treatment of sludge and high production efficiency;

3. The dried sludge is used for incineration to generate heat to avoid a large amount of organic matter and other substances in the sludge, and the energy consumption is low, which not only saves energy, but also has a good environmental protection effect.

Description of drawings

Fig. 1 is the appearance schematic diagram of the present invention;

Fig. 2 is the front view structure schematic diagram of the present invention;

Fig. 3 is a side view structural representation of the present invention;

Fig. 4 is a schematic diagram of a scraper and a circular flat plate of the present invention.

The labels in the figure are: 1: Scraper type sludge dryer, 2: Dispersed feeding device, 3: Feed main pipe, 4: Dispersed feed inlet, 5: Ventilation port, 6: Discharge port, 7: Steam Connecting pipe, 8: Safety valve, 9: Motor, 10: Rotating shaft, 11: Exhaust gas outlet, 12: Exhaust gas cooling tower, 13: Sludge inlet, 14: Excess sludge outlet, 15: Exhaust gas inlet, 16: Condensed exhaust gas outlet , 17: condensate outlet, 18: water outlet switch, 19: circular plate, 20: cylinder, 21: positive scraper, 22: reverse scraper, 23: dried sludge incineration equipment.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the content of the present invention is not limited to the stated scope.

Example 1: As shown in Figures 1-4, a complete set of sludge drying treatment device includes a scraper sludge dryer 1, a decentralized feeding device 2, an exhaust cooling tower 12, and sludge incineration equipment 23; The upper end of the plate sludge dryer 1 is connected to the tail gas cooling tower 12 , and the lower end is connected to the sludge incineration equipment 23 , and the distributed feeding device 2 is installed on the scraper sludge dryer 1 .

The scraper type sludge dryer 1 includes a safety valve 8, a motor 9, a circular plate 19, a cylinder 20, a positive scraper 21, and a reverse scraper 22; the cylinder 20 of the scraper type sludge dryer 1 is equipped with a rotating shaft 10 , the motor 9 is installed above the rotating shaft 10, the safety valve 8 is arranged at the upper left side of the cylinder 20 of the scraper type sludge dryer 1, the positive scraper 21 and the reverse scraper 22 are arranged on the rotating shaft 10, and the scraper type sludge is dried There are steam connecting pipes 7 on both sides of the barrel 20 of the machine 1, and the steam connecting pipes 7 are connected to the sludge incineration equipment 23. The tail gas outlet 11 is arranged on the right side of the top of the barrel 20, and the lower end is provided with a vent near the sludge incineration equipment 23. Port 5, the circular plate 19 is connected to the steam communication pipe 7, and the lower right side of the cylinder 20 of the scraper type sludge dryer 1 is provided with a discharge port 6.

The distributed feeding device 2 is provided with a feeding main pipe 3 and a dispersed feeding port 4 , and the dispersed feeding port 4 passes through the cylinder body 20 and leads to the circular plate 19 .

The tower wall of the tail gas cooling tower 12 has two layers, the inner layer is the tail gas channel, and the outer layer is the sludge channel. The tail gas cooling tower 12 is provided with a sludge inlet 13 on the upper left side of the outer layer, and a residual sludge outlet 14 on the lower side of the other side, a condensed tail gas outlet 16 on the upper right side of the inner layer, and a tail gas inlet 15 and a condensed water outlet 17 on the lower side , A water outlet switch 18 is provided at the condensate outlet 17 . The top cover of the cylinder body 20 adopts the shape of a circular pointed top, and the circular flat plate 19 is hollow and original, high around and low in the middle. The tail gas outlet 11 of the cylinder body 20 is connected with the tail gas inlet 15 of the tail gas cooling tower 12 . The excess sludge outlet 14 is connected with the feeding main pipe 3 on the dispersed feeding device 2 .

Example 2: As shown in Figures 1-4, a complete set of sludge drying treatment device, including a scraper sludge dryer 1, a decentralized feeding device 2, an exhaust cooling tower 12, and sludge incineration equipment 23; The upper end of the plate sludge dryer 1 is connected to the tail gas cooling tower 12 , and the lower end is connected to the sludge incineration equipment 23 , and the distributed feeding device 2 is installed on the scraper sludge dryer 1 .

The scraper type sludge dryer 1 includes a safety valve 8, a motor 9, a circular plate 19, a cylinder 20, a positive scraper 21, and a reverse scraper 22; the cylinder 20 of the scraper type sludge dryer 1 is equipped with a rotating shaft 10 , the motor 9 is installed above the rotating shaft 10, the safety valve 8 is arranged on the upper right side of the cylinder 20 of the scraper type sludge dryer 1, the positive scraper 21 and the reverse scraper 22 are arranged on the rotating shaft 10, and the scraper type sludge is dried There are steam connecting pipes 7 on both sides of the cylinder body 20 of the machine 1, the steam connecting pipes 7 are connected to the sludge incineration equipment 23, the tail gas outlet 11 is provided on the left side of the top, and the vent 5 is provided at the lower end close to the sludge incineration equipment 23. The circular plate 19 is connected to the steam communication pipe 7, and the lower left side of the barrel 20 of the scraper type sludge dryer 1 is provided with a discharge port 6.

The distributed feeding device 2 is provided with a feeding main pipe 3 and a dispersed feeding port 4 , and the dispersed feeding port 4 passes through the cylinder body 20 and leads to the circular plate 19 .

The tower wall of the tail gas cooling tower 12 has two layers, the inner layer is the tail gas channel, and the outer layer is the sludge channel. The tail gas cooling tower 12 has a sludge inlet 13 on the upper right side of the outer layer, a residual sludge outlet 14 on the lower side of the other side, a condensed tail gas outlet 16 on the upper left side of the inner layer, and a tail gas inlet 15 and a condensed water outlet 17 on the lower side , A water outlet switch 18 is provided at the condensate outlet 17 . The top cover of the cylinder body 20 adopts the shape of a circular pointed top, and the circular flat plate 19 is hollow and original, high around and low in the middle. The tail gas outlet 11 of the cylinder body 20 is connected with the tail gas inlet 15 of the tail gas cooling tower 12 . The excess sludge outlet 14 is connected with the feeding main pipe 3 on the dispersed feeding device 2 .

Claims (8)

1. a set treatment device of sludge drying is characterized in that: comprise scraper-type sludge drier (1), distributing feeding unit (2), tail gas cooling tower (12), sludge incineration equipment (23); Scraper-type sludge drier (1) upper end is connected with tail gas cooling tower (12), and the lower end is connected with sludge incineration equipment (23), and distributing feeding unit (2) is installed on the scraper-type sludge drier (1).

2. set treatment device of sludge drying according to claim 1 is characterized in that: said scraper-type sludge drier (1) comprises SV (8), phonomoter (9), circular dull and stereotyped (19), cylindrical shell (20), positive scraper plate (21), anti-scraper plate (22); In the cylindrical shell (20) of scraper-type sludge drier (1) rotating shaft (10) is installed; Phonomoter (9) is installed in the top of rotating shaft (10); SV (8) is placed in cylindrical shell (20) upper end of scraper-type sludge drier (1); Positive scraper plate (21), anti-scraper plate (22) are placed in the rotating shaft (10), and cylindrical shell (20) both sides of scraper-type sludge drier (1) are provided with vapor communication pipe (7), and vapor communication pipe (7) is connected with sludge incineration equipment (23); Cylindrical shell (20) upper end is provided with tail gas outlet (11); Ventage (5) is located to be provided with near sludge incineration equipment (23) in the lower end, and circular dull and stereotyped (19) are connected with vapor communication pipe (7), and cylindrical shell (20) downside of scraper-type sludge drier (1) is provided with discharge port (6).

3. set treatment device of sludge drying according to claim 1; It is characterized in that: said distributing feeding unit (2) is provided with charging house steward (3), disperses opening for feed (4), disperses opening for feed (4) to pass cylindrical shell (20) and feeds on circular dull and stereotyped (19).

4. set treatment device of sludge drying according to claim 1 is characterized in that: said tail gas cooling tower (12) tower wall is two-layer, and internal layer is an exhaust gas channel, and skin is the mud passage.

5. set treatment device of sludge drying according to claim 1; It is characterized in that: the outer upside of said tail gas cooling tower (12) is provided with mud import (13); The opposite side below is provided with excess sludge outlet (14); The internal layer upside is provided with condensation tail gas outlet (16), and downside is provided with tail gas import (15), condensation water outlet (17), and condensation water outlet (17) locates to be provided with effluent switch (18).

6. set treatment device of sludge drying according to claim 1 is characterized in that: said cylindrical shell (20) top top cover adopts circular pinnacle shape, and circular dull and stereotyped (19) are hollow original state, and is high all around, middle low.

7. set treatment device of sludge drying according to claim 1 is characterized in that: the tail gas outlet (11) of said cylindrical shell (20) is connected with the tail gas import (15) of tail gas cooling tower (12).

8. set treatment device of sludge drying according to claim 1 is characterized in that: said excess sludge outlet (14) is connected with charging house steward (3) on the distributing feeding unit (2).

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