Sludge treatment equipment

Abstract

The utility model discloses sludge treatment equipment. The sludge treatment equipment comprises a conveying pipe, a first end of the conveying pipe is connected with a sludge tank of a leachate treatment plant, a second end of the conveying pipe extends to a waste incineration plant, and sludge in the sludge tank is conveyed to the waste incineration plant through the conveying pipe; the screw delivery pump, the injection pump and the spray gun are sequentially mounted on the delivery pipe along the flow direction of sludge in the delivery pipe, and the spray gun extends into a combustion hearth of the waste incineration plant; the first valve is installed on the conveying pipe or the spray gun and used for controlling connection and disconnection between the conveying pipe and the spray gun. The utility model provides sludge treatment equipment which can reduce the treatment cost of flue gas and sludge.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration power generation technology, and in particular to a sludge treatment device. Background Technology

[0002] With increasingly stringent environmental standards, the waste-to-energy industry faces severe challenges in flue gas emissions, requiring waste-to-energy plants to achieve ultra-low emissions and reduce pollutant emissions, especially NOx emissions. Denitrification in municipal solid waste incineration plants generally employs SNCR (Selective Non-Catalytic Reduction) denitrification technology. This technology involves injecting an ammonia-containing reducing agent into the furnace. When injected into the flue gas at 850℃-1100℃, it rapidly decomposes into NH3, which then reduces NOx in the flue gas to produce N2. The cost of reducing agents such as ammonia and urea accounts for a significant proportion of the operating costs of waste-to-energy plants, while the treatment of residual sludge in leachate treatment plants is also a major cost.

[0003] Therefore, there is an urgent need for sludge treatment equipment to reduce the cost of flue gas and sludge treatment. Utility Model Content

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a sludge treatment device that can reduce the treatment cost of flue gas and sludge.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A sludge treatment device, comprising:

[0007] A conveying pipe, the first end of which is connected to the sludge pond of the leachate treatment plant, and the second end of which extends to the waste incineration plant, through which the sludge in the sludge pond is conveyed to the waste incineration plant;

[0008] A screw conveyor pump, a jet pump, and a spray gun are sequentially installed on the conveyor pipe along the flow direction of the sludge inside the conveyor pipe, and the spray gun extends into the combustion furnace of the waste incineration plant;

[0009] A first valve is installed on the delivery pipe or the spray gun to control the connection and disconnection between the delivery pipe and the spray gun.

[0010] Optionally, it also includes a thermometer, which is installed inside the combustion chamber and communicatively connected to the first valve, the injection pump, and the screw conveyor pump. The thermometer is used to detect the temperature value inside the combustion chamber.

[0011] Optionally, it also includes a first flow meter and a first pressure gauge, both of which are installed on the delivery pipe and located in the leachate treatment plant. Both the first flow meter and the first pressure gauge are communicatively connected to the screw conveyor pump. The first flow meter is used to detect the flow rate in the delivery pipe, and the first pressure gauge is used to detect the pressure in the delivery pipe.

[0012] Optionally, the system also includes a flushing pipe and a second valve installed on the flushing pipe, the second valve being used to control the opening and closing of the flushing pipe, the first end of the flushing pipe being connected to the conveying pipe and located downstream of the screw conveying pump, and the second end of the flushing pipe being connected to a water supply pipe outside the sludge treatment equipment.

[0013] Optionally, it also includes a sludge centrifugal dewatering device, a sludge centrifugal dewatering pipeline, a third valve, and a fourth valve. The first end of the sludge centrifugal dewatering pipeline is connected to the conveying pipe and located between the screw conveying pump and the first end of the flushing pipe. The second end of the sludge centrifugal dewatering pipeline is connected to the sludge centrifugal dewatering device. The third valve is installed on the conveying pipe and located between the first end of the sludge centrifugal dewatering pipeline and the first end of the flushing pipe. The fourth valve is installed on the conveying pipe and located between the first end of the flushing pipe and the jet pump.

[0014] Optionally, it also includes a second flow meter and a second pressure meter, both of which are installed on the conveying pipe and located in the waste incineration plant. Both the second flow meter and the second pressure meter are communicatively connected to the second valve. The second flow meter is used to detect the flow rate in the conveying pipe, and the second pressure meter is used to detect the pressure in the conveying pipe.

[0015] Optionally, the system also includes a self-backwashing filter, which is installed on the delivery pipe and located between the screw conveyor pump and the jet pump, and is used to filter sludge in the delivery pipe.

[0016] Optionally, it also includes a compressed air delivery pipe and a fifth valve installed on the compressed air delivery pipe, the first end of the compressed air delivery pipe being connected to the delivery pipe and located near the spray gun, and the second end of the compressed air delivery pipe being connected to a compressed air supply device outside the sludge treatment equipment.

[0017] Optionally, it also includes a cooling duct and a sixth valve installed on the cooling duct, the first end of the cooling duct being connected to the conveying pipe and located near the spray gun, and the second end of the cooling duct being connected to a cooling air device outside the sludge treatment equipment.

[0018] Optionally, it also includes a level switch, which is installed in the sludge tank and communicatively connected to the screw conveyor pump, and the level switch is used to detect the sludge level in the sludge tank.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects: Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sludge treatment equipment provided in a specific embodiment of this utility model.

[0021] In the picture:

[0022] 1. Screw conveyor pump; 21. First conveying pipe; 21. Second conveying pipe; 3. Spray gun; 4. Jet pump; 5. First valve; 6. Third valve; 7. Fourth valve; 8. Flushing pipe; 9. Second valve; 111. Second flow meter; 112. First flow meter; 121. Second pressure gauge; 122. First pressure gauge; 13. Compressed air conveying pipe; 14. Fifth valve; 15. Cooling air duct; 16. Sixth valve; 17. Self-backwashing filter; 18. Sludge centrifugal dewatering pipe. Detailed Implementation

[0023] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0024] Please refer to Figure 1 This utility model provides a sludge treatment device, including a conveying pipe, a screw conveying pump 1, a jet pump 4, a spray gun 3, and a first valve 5. The first end of the conveying pipe is connected to the sludge pool of a leachate treatment plant, and the second end extends to a waste incineration plant. Sludge from the sludge pool is conveyed to the waste incineration plant via the conveying pipe. The screw conveying pump 1, the jet pump 4, and the spray gun 3 are sequentially installed on the conveying pipe along the flow direction of the sludge within it. The spray gun 3 extends into the combustion chamber of the waste incineration plant. The first valve 5 is installed on either the conveying pipe or the spray gun 3 to control the connection between the conveying pipe and the spray gun 3.

[0025] The sludge treatment equipment provided by this utility model directly transports sludge from the sludge pool of the leachate treatment plant to the combustion furnace of the waste incineration plant through a conveying pipe, a screw conveying pump 1, a jet pump 4, and a spray gun 3. The reducing components such as ammonia (NHi), cyanide (HCN), and hydrocarbon radicals (CHi) in the sludge react with nitrogen oxides (NOx) in the flue gas generated in the combustion furnace of the waste incineration plant to produce nitrogen gas (N2). This not only treats the residual sludge of the leachate treatment plant, but also reduces the amount of reducing agents such as ammonia and urea used in the waste incineration plant, and has the advantages of being harmless and low-cost.

[0026] Optionally, it also includes a thermometer, which is installed inside the combustion furnace and is communicatively connected to the first valve 5, the injection pump 4, and the screw conveyor pump 1. The thermometer is used to detect the temperature value inside the combustion furnace. When the temperature value reaches the preset temperature (870℃), the first valve 5 opens, and then the screw conveyor pump 1 runs and the injection pump 4 opens.

[0027] Furthermore, the operating load of the injection pump 4 is adjusted according to the specific temperature inside the combustion furnace, and the specific temperature inside the combustion furnace is proportional to the operating load of the injection pump 4.

[0028] Optionally, the system also includes a first flow meter 112 and a first pressure gauge 122. Both the first flow meter 112 and the first pressure gauge 122 are installed on the delivery pipe and located in the leachate treatment plant. Both are communicatively connected to the screw conveyor pump 1. The first flow meter 112 detects the flow rate in the delivery pipe, and the first pressure gauge 122 detects the pressure in the delivery pipe. The operating load of the screw conveyor pump 1 is adjusted based on the flow rate and pressure in the delivery pipe so that the amount of sludge pumped by the screw conveyor pump 1 matches the amount of sludge sprayed by the spray gun 3. For example, when the spray gun 3 sprays 2 cubic meters of sludge per hour, the screw conveyor pump 1 should also deliver 2 cubic meters of sludge per hour.

[0029] Optionally, the system also includes a flushing pipe 8 and a second valve 9 installed on the flushing pipe 8. The second valve 9 is used to control the opening and closing of the flushing pipe 8. The first end of the flushing pipe 8 is connected to the conveying pipe and is located downstream of the screw conveyor pump 1. The second end of the flushing pipe 8 is connected to a water supply pipe outside the sludge treatment equipment. When the screw conveyor pump 1 stops working, the jet pump 4, the first valve 5, and the second valve 9 are opened so that water in the flushing pipe 8 can be sprayed out from the conveying pipe and the spray gun 3 in sequence, thereby realizing automatic cleaning of the conveying pipe and the spray gun 3.

[0030] Optionally, the system also includes a sludge centrifugal dewatering device, a sludge centrifugal dewatering pipe 18, a third valve 6, and a fourth valve 7. The first end of the sludge centrifugal dewatering pipe 18 is connected to the conveying pipe and located between the screw conveyor pump 1 and the first end of the flushing pipe 8. The second end of the sludge centrifugal dewatering pipe 18 is connected to the sludge centrifugal dewatering device. The third valve 6 is installed on the conveying pipe and located between the first end of the sludge centrifugal dewatering pipe 18 and the first end of the flushing pipe 8. The fourth valve 7 is installed on the conveying pipe and located between the first end of the flushing pipe 8 and the jet pump 4. When cleaning the conveying pipe and the spray gun 3, the third valve 6 is closed, and the fourth valve 7 is opened, so that cleaning water does not flow into the sludge centrifugal dewatering pipe 18 via the third valve 6. When the combustion furnace stops burning and the jet pump 4 and the spray gun 3 stop working, the second valve 9 and the fourth valve are closed, so that the sludge conveyed by the screw conveyor pump 1 can enter the sludge centrifugal dewatering device through the sludge centrifugal dewatering pipe 18 for dewatering and processing of excess sludge. The sludge centrifugal dewatering device is existing technology and will not be described in detail here.

[0031] Optionally, the system also includes a second flow meter 111 and a second pressure gauge 121. Both the second flow meter 111 and the second pressure gauge 121 are installed on the conveying pipe and located in the waste incineration plant. Both the second flow meter 111 and the second pressure gauge 121 are communicatively connected to the second valve 9. The second flow meter 111 is used to detect the flow rate in the conveying pipe, and the second pressure gauge 121 is used to detect the pressure in the conveying pipe. When the pressure in the conveying pipe is too high or the flow rate is too low, it indicates that the combustion furnace has stopped working or that the amount of sludge input from the sludge tank into the combustion furnace is too small. At this time, the second valve 9 is opened for a preset time to realize automatic cleaning operation. After that, the jet pump 4, the screw conveying pump 1, and the first valve 5 are shut down to stop the sludge conveying into the combustion furnace. Thus, the sludge treatment operation is completed.

[0032] Optionally, a self-backwashing filter 17 is also included. The self-backwashing filter 17 is installed on the conveying pipe and located between the screw conveying pump 1 and the jet pump 4. The self-backwashing filter 17 is used to filter the sludge in the conveying pipe, removing large particles of sludge and preventing blockage of the conveying pipe, sludge centrifugal dewatering pipe 18, sludge centrifugal dewatering device, jet pump 4, third valve 6, fourth valve 7, first valve 5, and spray gun 3. It should be noted that the self-backwashing filter 17 is prior art and will not be described in detail here.

[0033] Optionally, the system also includes a compressed air delivery pipe 13 and a fifth valve 14 installed on the compressed air delivery pipe 13. The first end of the compressed air delivery pipe 13 is connected to the delivery pipe and located near the spray gun 3, while the second end of the compressed air delivery pipe 13 is connected to a compressed air supply device outside the sludge treatment equipment. When the jet pump 4 starts working, the fifth valve 14 opens to provide compressed air to the spray gun 3, thereby enabling the sludge sprayed from the spray gun 3 to be sprayed more evenly into the combustion furnace. This improves the efficiency of the reaction between the reducing components in the sludge, such as ammonia (NHi), cyanide (HCN), and hydrocarbon radicals (CHi), and the nitrogen oxides (NOx) in the flue gas formed in the combustion furnace of the waste incineration plant to generate nitrogen (N2), ensuring a more complete reaction.

[0034] Optionally, the system also includes a cooling duct 15 and a sixth valve 16 installed on the cooling duct 15. The first end of the cooling duct 15 is connected to the conveying pipe and located near the spray gun 3, and the second end of the cooling duct 15 is connected to a cooling air device outside the sludge treatment equipment. Cool air is delivered to the spray gun 3 through the cooling duct 15 to reduce the temperature of the spray gun 3 located in the combustion furnace, preventing the spray gun 3 from deforming under continuous high temperature, thereby maintaining the stability of sludge spraying.

[0035] Optionally, a level switch is also included. The level switch is installed in the sludge tank and is communicatively connected to the screw conveyor pump 1. The level switch is used to detect the sludge level in the sludge tank. When the sludge level in the sludge tank is too low, the level switch disconnects the operating current of the screw conveyor pump 1, causing the screw conveyor pump 1 to stop working.

[0036] Optionally, the conveying pipe includes a first conveying pipe 21 and a second conveying pipe 21 connected to each other. The first conveying pipe 21 is connected to the sludge tank, and the second conveying pipe is connected to the spray gun 3. The screw conveying pump 1, the self-backwashing filter 17, the sludge centrifugal dewatering pipe 18, and the third valve 6 are all installed on the first conveying pipe 21. The jet pump 4, the spray gun 3, the fourth valve 7, the first valve 5, the compressed air conveying pipe 13, and the cold zone air duct are all installed on the second conveying pipe.

[0037] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A sludge treatment device, characterized in that, include: A conveying pipe, the first end of which is connected to the sludge pond of the leachate treatment plant, and the second end of which extends to the waste incineration plant, through which the sludge in the sludge pond is conveyed to the waste incineration plant; The screw conveyor pump (1), the jet pump (4), and the spray gun (3) are installed sequentially on the conveyor pipe along the flow direction of the sludge in the conveyor pipe, and the spray gun (3) extends into the combustion furnace of the waste incineration plant. A first valve (5) is installed on the delivery pipe or the spray gun (3) to control the connection and disconnection between the delivery pipe and the spray gun (3).

2. The sludge treatment equipment according to claim 1, characterized in that, It also includes a thermometer, which is installed inside the combustion chamber and is communicatively connected to the first valve (5), the injection pump (4), and the screw conveyor pump (1). The thermometer is used to detect the temperature value inside the combustion chamber.

3. The sludge treatment equipment according to claim 1, characterized in that, It also includes a first flow meter (112) and a first pressure gauge (122), both of which are installed on the delivery pipe and located in the leachate treatment plant. Both the first flow meter (112) and the first pressure gauge (122) are communicatively connected to the screw conveyor pump (1). The first flow meter (112) is used to detect the flow rate in the delivery pipe, and the first pressure gauge (122) is used to detect the pressure in the delivery pipe.

4. The sludge treatment equipment according to claim 1, characterized in that, It also includes a flushing pipe (8) and a second valve (9) installed on the flushing pipe (8), the second valve (9) being used to control the opening and closing of the flushing pipe (8), the first end of the flushing pipe (8) being connected to the conveying pipe and located downstream of the screw conveying pump (1), and the second end of the flushing pipe (8) being connected to a water supply pipe outside the sludge treatment equipment.

5. The sludge treatment equipment according to claim 4, characterized in that, It also includes a sludge centrifugal dewatering device, a sludge centrifugal dewatering pipe (18), a third valve (6) and a fourth valve (7). The first end of the sludge centrifugal dewatering pipe (18) is connected to the conveying pipe and is located between the screw conveying pump (1) and the first end of the flushing pipe (8). The second end of the sludge centrifugal dewatering pipe (18) is connected to the sludge centrifugal dewatering device. The third valve (6) is installed on the conveying pipe and is located between the first end of the sludge centrifugal dewatering pipe (18) and the first end of the flushing pipe (8). The fourth valve (7) is installed on the conveying pipe and is located between the first end of the flushing pipe (8) and the jet pump (4).

6. The sludge treatment equipment according to claim 4, characterized in that, It also includes a second flow meter (111) and a second pressure gauge (121), both of which are installed on the conveying pipe and located in the waste incineration plant. Both the second flow meter (111) and the second pressure gauge (121) are communicatively connected to the second valve (9). The second flow meter (111) is used to detect the flow rate in the conveying pipe, and the second pressure gauge (121) is used to detect the pressure in the conveying pipe.

7. The sludge treatment equipment according to any one of claims 1-6, characterized in that, It also includes a self-backwashing filter (17), which is installed on the delivery pipe and located between the screw conveyor pump (1) and the jet pump (4), and the self-backwashing filter (17) is used to filter sludge in the delivery pipe.

8. The sludge treatment equipment according to any one of claims 1-6, characterized in that, It also includes a compressed air delivery pipe (13) and a fifth valve (14) installed on the compressed air delivery pipe (13). The first end of the compressed air delivery pipe (13) is connected to the delivery pipe and located near the spray gun (3). The second end of the compressed air delivery pipe (13) is connected to a compressed air supply device outside the sludge treatment equipment.

9. The sludge treatment equipment according to any one of claims 1-6, characterized in that, It also includes a cooling duct (15) and a sixth valve (16) installed on the cooling duct (15). The first end of the cooling duct (15) is connected to the conveying pipe and located near the spray gun (3). The second end of the cooling duct (15) is connected to a cold air device outside the sludge treatment equipment.

10. The sludge treatment equipment according to any one of claims 1-6, characterized in that, It also includes a level switch, which is installed in the sludge tank and communicates with the screw conveyor pump. The level switch is used to detect the sludge level in the sludge tank.

Images