CN202576178U - Sludge drying treatment device with low energy consumption - Google Patents

Abstract

The utility model discloses a low-energy sludge drying treatment device, which comprises a drying kiln, a sludge hopper is arranged on the upper part of the drying kiln, a sludge outlet is arranged on the lower part of the drying kiln, and a sludge outlet is arranged on the lower part of the drying kiln. An air inlet is provided, an air outlet is provided on the top of the drying kiln, and a multi-layer mesh conveyor belt is arranged inside the drying kiln, and the movement directions of the adjacent mesh conveyor belts are opposite, and the upper layer The sludge on the grid-like conveyor belt falls on the grid-like conveyor belt of the next layer. Compared with the prior art, the low-energy sludge drying treatment device provided by the utility model has high heat exchange efficiency, high output of dried sludge, can reduce energy consumption, and the sludge will not block the equipment and will not generate a large amount of fine dust.

Description

A low-energy sludge drying treatment device

technical field

The utility model relates to the field of sludge treatment equipment, in particular to a low-energy sludge drying treatment device. the

Background technique

Substances such as sediment, particulate matter and floating matter produced after wastewater treatment are collectively referred to as sludge. Land reduction is currently the most important method for sludge treatment and disposal in my country. As the amount of sludge continues to increase, land resources are becoming more and more scarce. Simple land reduction treatment can no longer meet the needs. In addition, sludge contains a variety of toxic and harmful substances, which cannot be directly used as fertilizers or soil improvers. leaving new environmental problems. At present, neither the spraying sludge drying device nor the drum drying device can be widely promoted, and its main disadvantages are as follows:

1. Low heat exchange efficiency and low output of dried sludge;

2. The energy consumption is high, the system resistance is above 7000Pa, and each ton of wet sludge (80% moisture content) needs to consume more than 110 degrees of electricity to dry to 30% moisture content;

3. During the drying process, the semi-dry sludge has a strong cohesive force, which causes equipment blockage and affects the output. Mechanical cleaning equipment is severely worn, which affects the service life of the equipment and requires a large amount of maintenance;

4. Due to the high flow rate of the spray drying (the spray flow rate is 39 m/s, and the rising flow rate of the flue gas mixture is 17 m/s), dust is generated. The system needs to be equipped with dust removal equipment, which increases equipment investment. the

Utility model content

In view of the above-mentioned defects, the technical problem solved by the utility model is to provide a low-energy sludge drying treatment device, which has high heat exchange efficiency, high output of dried sludge, can reduce energy consumption, and the sludge will not block the equipment, and will not Large amounts of fine dust are generated. the

In order to solve the above technical problems, the low-energy sludge drying treatment device provided by the utility model includes a drying kiln, the upper part of the drying kiln is provided with a sludge bucket, and the lower part of the drying kiln is provided with a sludge outlet. The lower side of the drying kiln is provided with an air inlet, the top of the drying kiln is provided with an air outlet, and the inside of the drying kiln is provided with a multi-layer grid conveyor belt, and the movement of the adjacent grid conveyor belts The direction is opposite, and the sludge on the grid-like conveyor belt of the upper layer falls onto the grid-like conveyor belt of the next layer. the

Preferably, a sludge distributing mechanism is provided in the sludge hopper, and the sludge distributing mechanism includes two rotors with opposite rotation directions, and the rotors are provided with distributing rakes meshing with each other. the

Preferably, a sludge leveling roller is provided at the outlet of the sludge hopper, and leveling rake teeth are arranged on the sludge leveling roller. the

Preferably, the number of layers of the mesh conveyor belt is 2-30 layers. the

Preferably, a sludge blowing-off air pipe is provided at the end of the mesh conveyor belt, and an air outlet is provided on the air pipe. the

Preferably, the grid-like conveyor belt is provided with a support rod, and the support rod supports the upper endless belt of the grid-like conveyor belt. the

Preferably, the grid-like conveyor belt is provided with vibrating rods, and the vibration rods support the lower endless belt of the grid-like conveyor belt. the

Preferably, the lower part of the drying kiln is a bucket-shaped structure, and a dry material conveyor is arranged at the sludge outlet. the

Preferably, the air inlet is connected to a hot air source through an air inlet pipeline, and a blower fan is arranged on the air inlet pipeline. the

Preferably, the air outlet is connected to the exhaust gas treatment mechanism through an air outlet pipeline, the air outlet is provided with a dehydration mechanism, and the air outlet pipeline is provided with a fan. the

In the low-energy sludge drying treatment device provided by the utility model, the sludge enters the grid-shaped conveyor belt in the drying kiln through the sludge hopper, and the movement direction of the adjacent grid-shaped conveyor belt is opposite, and all the sludge on the upper layer The sludge on the grid conveyor belt falls onto the grid conveyor belt on the next layer. Since the conveyor belt has a grid structure with holes, the hot air enters through the air inlet on the lower side, and the hot air passes through the mesh. The holes of the lattice conveyor belt move from bottom to bottom, exchange heat with the sludge with high water content, dry the moisture of the sludge and dry the sludge, and finally the hot air with moisture comes out from the top air outlet of the drying kiln flow out. And because of the low flow rate of the hot air, it will not take away the dust when it flows upward through the sludge layer, that is, a small amount of dust will be absorbed by the wet sludge when it passes through the wet sludge layer, so that the dust content of the hot air is very small and can be discharged up to the standard. Compared with the prior art, the low-energy sludge drying treatment device provided by the utility model has high heat exchange efficiency, high output of dried sludge, can reduce energy consumption, and the sludge will not block the equipment and will not generate a large amount of fine dust. the

Description of drawings

Fig. 1 is the structure schematic diagram of low energy consumption sludge drying treatment device in embodiment 1 of the present utility model;

Fig. 2 is a schematic structural view of a low-energy sludge drying treatment device in Example 2 of the utility model;

Fig. 3 is a schematic structural diagram of a low-energy sludge drying treatment device in Example 3 of the present utility model. the

Detailed ways

In order for those skilled in the art to better understand the technical solutions provided by the utility model, the following will be described in conjunction with specific embodiments. the

Example 1

Please refer to Fig. 1, which is a schematic structural diagram of a low-energy sludge drying treatment device in Example 1 of the present utility model. the

The low energy consumption sludge drying treatment device provided by the utility model comprises a drying kiln 1, the upper part of the drying kiln 1 is provided with a sludge bucket 4, the lower part of the drying kiln 1 is provided with a sludge outlet, and the lower part of the drying kiln 1 is provided with a The air inlet 11, the top of the drying kiln 1 is provided with an air outlet, and the inside of the drying kiln 1 is provided with 5 layers of grid-shaped conveyor belts 7, the movement direction of the adjacent grid-shaped conveyor belts 7 is opposite, and the grid of the upper layer The sludge on the grid-shaped conveyor belt 7 falls on the grid-shaped conveyor belt 7 of the next layer. the

A sludge distributing mechanism 5 is arranged inside the sludge hopper 4, and the sludge distributing mechanism includes two rotors with opposite rotation directions, and mutually meshing distributing rake teeth are arranged on the rotors. The sludge distributing mechanism 5 spreads the sludge evenly on the grid conveyor belt. the

A sludge leveling roller 6 is arranged at the outlet of the sludge hopper 4, and the sludge leveling roller 6 is provided with leveling rake teeth, which evenly rake the sludge laid on the mesh conveyor belt 7 Formed into thin strips, it is not only conducive to the blowing of hot air, but also conducive to increasing the surface area of the sludge and improving the heat exchange efficiency. the

The end of the mesh conveyor belt 7 is provided with a sludge blowing off air pipe 10, and the air pipe 10 is provided with an air outlet, and the sludge blowing off air pipe 10 can blow off the sludge attached to the mesh conveyor belt 7 by air pressure, Prevent sludge from adhering to the mesh conveyor belt 7. the

Grid conveyor belt 7 is provided with support bar 8, and support bar 8 supports the upper loop belt of grid conveyor belt 7, can prevent the upper loop belt of grid conveyor belt 7 from sagging. the

The grid conveyor belt 7 is provided with a square vibrating rod 9, and the square vibrating rod 9 supports the lower circulation belt of the grid conveyor belt 7, which can hold the lower circulation belt of the grid conveyor belt 7 and make the grid The lower circulation belt of grid-shaped conveyor belt 7 produces self-vibration, and further vibrates the sludge stuck on grid-shaped conveyor belt 7. the

The lower part of the drying kiln 1 is a bucket-shaped structure, and a dry material conveyor 16 is arranged at the sludge outlet, which is beneficial to the conveyance of the dried sludge. the

The air inlet 11 is connected with the hot air source 13 through the air inlet pipeline, and the fan 12 is arranged on the air inlet pipeline. The air outlet is connected to the waste gas treatment mechanism 15 through the air outlet pipeline, and the air outlet is provided with a dehydration mechanism 14 . the

In the low-energy sludge drying treatment device provided by the utility model, the sludge enters the sludge bucket 4 through the wet material conveyor 3 in the sludge pool 2, and then enters the grid-shaped conveyor belt 7 in the drying kiln through the sludge bucket 4 Above, the moving direction of the adjacent grid-shaped conveyor belt 7 is opposite, and the sludge of the grid-shaped conveyor belt 7 on the upper layer falls on the grid-shaped conveyor belt 7 of the next layer, because the conveyor belt It is a grid-like structure with holes. The hot air enters through the air inlet 11 on the lower side, and the hot air moves from bottom to bottom through the holes of the grid-like conveyor belt 7 to exchange heat with the sludge with high water content. The moisture of the sludge is dried and the sludge is dried, and finally the hot air with moisture flows out from the top air outlet of the drying kiln. And because of the low flow rate of the hot air, it will not take away the dust when it flows upward through the sludge layer, that is, a small amount of dust will be absorbed by the wet sludge when it passes through the wet sludge layer, so that the dust content of the hot air is very small and can be discharged up to the standard. the

Compared with the prior art, the low-energy sludge drying treatment device provided by the utility model has high heat exchange efficiency, high output of dried sludge, can reduce energy consumption, and the sludge will not block the equipment and will not generate a large amount of Fine dust, specifically, has the following advantages:

1. The high-efficiency and energy-saving technology is suitable for direct and rapid drying of paste, filter cake and other materials. the

2. The airtightness is good, the oxygen content is not increased during the drying process, which is almost the same as the oxygen content of the flue gas, eliminating the possibility of sludge deflagration during the drying process. the

3. It will not stick to the equipment. It can use polytetrafluoroethylene, steel mesh belt or other high temperature resistant non-metallic material. The sludge on the belt falls off quickly. the

4. Countercurrent drying, and the flat sludge is less than 5mm. According to the output, it can be made into a multi-layer mesh conveyor belt structure, so that the sludge contact area is large, the hot flue gas and the sludge contact for a long time during drying, and the heat exchange efficiency is high. ,High Yield. the

5. Countercurrent dry manufacturing, the sludge distribution mechanism and sludge leveling roller are used to spread the sludge evenly, which is equivalent to filter bag dust removal, does not generate dust, and discharges cleanly. the

6. The system resistance is small (less than 2000Pa) and the energy consumption is low, which is 70% lower than the traditional spray drying. the

7. This low energy consumption dryer has compact design, small volume and low investment. the

8. When the user has a large amount of drying and the land is limited, the device can be developed in the air, and the occupied area is small. the

9. The method of waste treatment is used to dry the sludge, which not only reduces the cost of sludge drying treatment, but also uses the waste heat of boiler flue gas to dry the wet sludge with a moisture content of about 80% into 15-30% dry sewage The sludge is then sent to the boiler by a conveying device for combustion, and the calorific value in the sludge is converted into thermal energy resources for effective use, so as to realize the purpose of waste treatment and waste recovery of heat energy. the

10. After the dried sludge is sent to the boiler for high-temperature combustion, it will be completely decomposed into harmless substances, realizing the final harmless treatment and preventing secondary pollution. the

11. Realized low-carbon emissions and reduced greenhouse gas production. the

12. Effective recovery of combustibles in the sludge (the low calorific value of domestic sludge is more than 1500Kcal/Kg, the lower calorific value of printing and dyeing sludge is more than 1800Kcal/Kg, the lower calorific value of papermaking sludge is more than 2000Kcal/Kg, the beverage and food industry Wastewater sludge has a high calorific value) has truly realized the environmental management concept of treating waste and turning waste into treasure. the

Example 2

Please refer to Fig. 2, which is a schematic structural diagram of a low-energy sludge drying treatment device in Example 2 of the present utility model. The air inlet 11 is connected with the hot air source 13 through an air inlet pipeline. The air outlet is connected to the waste gas treatment mechanism 15 through the air outlet pipeline, the air outlet is provided with a dehydration mechanism 14, and the fan 12 is arranged on the air outlet pipeline. the

Example 3

Please refer to FIG. 3 , which is a schematic structural diagram of a low-energy sludge drying treatment device in Embodiment 3 of the present utility model. The air inlet 11 is connected with the hot air source 13 through the air inlet pipeline, and the fan 12 is arranged on the air inlet pipeline. The air outlet is connected to the waste gas treatment mechanism 15 through the air outlet pipeline, the air outlet is provided with a dehydration mechanism 14, and the fan 12 is arranged on the air outlet pipeline. the

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein. the

Claims (10)

1. A low-energy sludge drying treatment device, characterized in that it comprises a drying kiln, the top of the drying kiln is provided with a sludge bucket, the bottom of the drying kiln is provided with a sludge outlet, and the bottom of the drying kiln The side is provided with an air inlet, and the top of the drying kiln is provided with an air outlet. The inside of the drying kiln is provided with a multi-layer mesh conveyor belt, and the moving directions of the adjacent mesh conveyor belts are opposite. The sludge of the mesh conveyor belt of one layer falls onto the mesh conveyor belt of the next layer. 2. The low-energy sludge drying treatment device according to claim 1, wherein a sludge distribution mechanism is arranged in the sludge hopper, and the sludge distribution mechanism includes two rotors with opposite rotation directions , the rotor is provided with intermeshing distribution rake teeth. 3. The low-energy sludge drying treatment device according to claim 1, wherein a sludge leveling roller is arranged at the outlet of the sludge hopper, and a leveling roller is arranged on the sludge leveling roller. Flat tines. 4. The low-energy sludge drying treatment device according to claim 1, characterized in that, the number of layers of the mesh conveyor belt is 2-30 layers. 5 . The low-energy sludge drying treatment device according to claim 1 , characterized in that, the end of the grid-shaped conveyor belt is provided with a sludge blow-off air pipe, and the air pipe is provided with an air outlet. 5 . 6. The low-energy sludge drying treatment device according to claim 1, characterized in that, the grid-shaped conveyor belt is provided with a support rod, and the support rod supports the upper circulation belt of the grid-shaped conveyor belt. 7. The low-energy sludge drying treatment device according to claim 1, characterized in that, the grid-shaped conveyor belt is provided with vibrating rods, and the vibrating rods support the lower circulation belt of the grid-shaped conveyor belt. 8. The low-energy sludge drying treatment device according to claim 1, characterized in that, the lower part of the drying kiln is a bucket-shaped structure, and a dry material conveyor is arranged at the sludge outlet. the 9. The low-energy sludge drying treatment device according to claim 1, wherein the air inlet is connected to a hot air source through an air inlet pipeline, and a fan is arranged on the air inlet pipeline. 10. The low-energy sludge drying treatment device according to claim 1, characterized in that, the air outlet is connected to the exhaust gas treatment mechanism through an air outlet pipeline, the air outlet is provided with a dehydration mechanism, and the air outlet pipe There is a fan on the road. the