Sludge treatment equipment

Abstract

The invention 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 invention provides sludge treatment equipment which can reduce the treatment cost of flue gas and sludge.

Description

Technical Field

[0001] The invention relates to the technical field of garbage incineration power generation, and in particular to sludge processing equipment. Background Art

[0002] With increasingly stringent environmental standards, the waste incineration power generation industry faces severe challenges in flue gas emissions, requiring waste incineration power plants to achieve ultra-low emissions and reduce pollutant emissions, especially NOx emissions. Domestic waste incineration plants generally use SNCR denitrification, which is a selective non-catalytic reduction denitrification technology. A reducing agent containing amino groups is sprayed into the furnace. When sprayed into the flue gas at 850℃-1100℃, it is rapidly thermally decomposed into NH3 and reacts with NOx in the flue gas to generate N2. The cost of reducing agents such as ammonia water and urea accounts for a large proportion of the operating cost of waste incineration power plants, and the treatment of residual sludge in leachate treatment plants is also one of the main costs of leachate treatment plants.

[0003] Therefore, there is an urgent need for a sludge treatment device to reduce the treatment cost of flue gas and sludge. Summary of the invention

[0004] The present invention aims to solve one of the problems existing in the existing related technologies to at least a certain extent. 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 purpose is achieved through the following technical solutions:

[0006] A sludge treatment device, comprising:

[0007] A delivery pipe, a first end of which is connected to a sludge pool of a leachate treatment plant, a second end of which extends to a waste incineration plant, and sludge in the sludge pool is delivered to the waste incineration plant via the delivery pipe;

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

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

[0010] Optionally, a thermometer is also included, which is installed in the combustion furnace and is communicatively connected with the first valve, the injection pump, and the screw conveying pump, and the thermometer is used to detect the temperature value in the combustion furnace.

[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, and both of which are communicatively connected to the screw delivery pump. The first flow meter is used to detect the flow value in the delivery pipe, and the first pressure gauge is used to detect the pressure value in the delivery pipe.

[0012] Optionally, it also includes a flushing pipe and a second valve installed on the flushing pipe, the second valve is used to control the on and off of the flushing pipe, the first end of the flushing pipe is connected to the conveying pipe and is located downstream of the screw conveying pump, and the second end of the flushing pipe is connected to the 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 is 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 is located between the first end of the sludge centrifugal dewatering pipeline and the first end of the flushing pipe, and the fourth valve is installed on the conveying pipe and is 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 gauge, wherein the second flow meter and the second pressure gauge are both installed on the delivery pipe and located in the waste incineration plant, and the second flow meter and the second pressure gauge are both communicatively connected to the second valve, the second flow meter is used to detect the flow value in the delivery pipe, and the second pressure gauge is used to detect the pressure value in the delivery pipe.

[0015] Optionally, a self-backwashing filter is further included, which is installed on the delivery pipe and located between the screw delivery pump and the jet pump, and is used to filter the 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, wherein the first end of the compressed air delivery pipe is connected to the delivery pipe and is located close to the spray gun, and the second end of the compressed air delivery pipe is connected to the compressed air supply equipment outside the sludge treatment equipment.

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

[0018] Optionally, a liquid level switch is also included, which is installed in the sludge tank and is communicatively connected with the screw conveying pump, and the liquid level switch is used to detect the sludge liquid level in the sludge tank.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects: BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a sludge treatment device provided in a specific embodiment of the present invention.

[0021] In the figure:

[0022] 1. Screw conveying pump; 21. First conveying pipeline; 21. Second conveying pipeline; 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 dehydration pipeline. DETAILED DESCRIPTION

[0023] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0024] Please refer to Figure 1 The present invention provides a sludge treatment device, including a delivery pipe, a screw delivery pump 1, a jet pump 4, a spray gun 3 and a first valve 5. The first end of the delivery pipe is connected to the sludge pool of the leachate treatment plant, and the second end of the delivery pipe extends to the garbage incineration plant. The sludge in the sludge pool is transported to the garbage incineration plant via the delivery pipe. The screw delivery pump 1, the jet pump 4, and the spray gun 3 are sequentially installed on the delivery pipe along the flow direction of the sludge in the delivery pipe, and the spray gun 3 extends into the combustion furnace of the garbage incineration plant. The first valve 5 is installed on the delivery pipe or the spray gun 3, and is used to control the on-off between the delivery pipe and the spray gun 3.

[0025] The sludge treatment equipment provided by the present invention directly transports the sludge in the sludge pool of the leachate treatment plant to the combustion furnace of the garbage incineration plant by arranging a delivery pipe, a screw delivery pump 1, a jet pump 4, and a spray gun 3, and utilizes the reducing components such as ammonia (NHi), cyanide (HCN), hydrocarbon radical (CHi) in the sludge to react with nitrogen oxides (NOX) in the flue gas formed in the combustion furnace of the garbage incineration plant to generate nitrogen (N2). In this way, the residual sludge of the leachate treatment plant can be treated, and the use of reducing agents such as ammonia water and urea in the garbage incineration plant can be reduced, which has the advantages of harmlessness and low cost.

[0026] Optionally, a thermometer is also included. The thermometer is installed in the combustion furnace and is communicated with the first valve 5, the jet pump 4, and the screw pump 1. The thermometer is used to detect the temperature value in the combustion furnace. When the temperature value reaches a preset temperature (870°C), the first valve 5 opens, and then the screw pump 1 runs and the jet pump 4 opens.

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

[0028] Optionally, a first flow meter 112 and a first pressure gauge 122 are further included, both of which are installed on the delivery pipe and located in the leachate treatment plant, and both of which are connected to the screw pump 1 in communication, the first flow meter 112 is used to detect the flow value in the delivery pipe, and the first pressure gauge 122 is used to detect the pressure value in the delivery pipe, and the operating load of the screw pump 1 is adjusted according to the flow value and the pressure value in the delivery pipe, so that the amount of sludge pumped by the screw pump 1 can match 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 pump 1 should also transport 2 cubic meters of sludge per hour.

[0029] Optionally, it 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 on and off of the flushing pipe 8, the first end of the flushing pipe 8 is connected to the delivery pipe and is located downstream of the screw delivery pump 1, and the second end of the flushing pipe 8 is connected to the water supply pipeline outside the sludge treatment equipment. When the screw delivery pump 1 stops working, the jet pump 4, the first valve 5, and the second valve 9 are opened so that the water in the flushing pipe 8 can be sprayed out from the delivery pipe and the spray gun 3 in turn, thereby realizing automatic cleaning of the delivery pipe and the spray gun 3.

[0030] Optionally, it also includes a sludge centrifugal dewatering device, a sludge centrifugal dewatering pipeline 18, a third valve 6 and a fourth valve 7, the first end of the sludge centrifugal dewatering pipeline 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 pipeline 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 pipeline 18 and the first end of the flushing pipe 8, and 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. When the conveying pipe and the spray gun 3 are cleaned, the third valve 6 is closed and the fourth valve 7 is opened so that the cleaning water does not flow into the sludge centrifugal dewatering pipeline 18 through 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 conveying pump 1 can enter the sludge centrifugal dewatering device through the sludge centrifugal dewatering pipeline 18 for dehydration, and the excess sludge is processed. Among them, the sludge centrifugal dewatering device is a prior art and will not be described in detail here.

[0031] Optionally, it also includes a second flow meter 111 and a second pressure gauge 121, which are both installed on the delivery pipe and located in the waste incineration plant. The second flow meter 111 and the second pressure gauge 121 are both connected to the second valve 9 for communication, and the second flow meter 111 is used to detect the flow value in the delivery pipe, and the second pressure gauge 121 is used to detect the pressure value in the delivery pipe. When the pressure value in the delivery pipe is too high and the flow rate is too low, it means that the combustion furnace has stopped working or the amount of sludge input from the sludge pool into the combustion furnace is too small. At this time, the second valve 9 opens for a preset time to realize the automatic cleaning operation, and then shuts down the jet pump 4, the screw delivery pump 1 and the first valve 5, and stops delivering sludge to the combustion furnace. At this point, the sludge treatment operation is completed.

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

[0033] Optionally, it also includes a compressed air delivery pipe 13 and a fifth valve 14 installed on the compressed air delivery pipe 13, wherein the first end of the compressed air delivery pipe 13 is connected to the delivery pipe and is located near the spray gun 3, and the second end of the compressed air delivery pipe 13 is connected to the compressed air supply device outside the sludge treatment equipment. When the jet pump 4 starts to work, the fifth valve 14 opens to provide compressed air to the spray gun 3, so that the sludge sprayed from the spray gun 3 can be sprayed into the combustion furnace more evenly, thereby improving the efficiency of the reaction between the reducing components such as ammonia (NHi), cyanide (HCN), hydrocarbon radical (CHi) in the sludge and the nitrogen oxides (NOX) in the flue gas formed in the combustion furnace of the waste incineration plant to generate nitrogen (N2), and the reaction is sufficient.

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

[0035] Optionally, a liquid level switch is also included, which is installed in the sludge tank and is in communication connection with the screw pump 1. The liquid level switch is used to detect the sludge liquid level in the sludge tank. When the liquid level in the sludge tank is too low, the liquid level switch disconnects the working current of the screw pump 1, so that the screw pump 1 stops working.

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

[0037] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A sludge treatment equipment, characterized in that: include: A delivery pipe, a first end of which is connected to a sludge pool of a leachate treatment plant, a second end of which extends to a waste incineration plant, and sludge in the sludge pool is delivered to the waste incineration plant via the delivery pipe; A screw conveying pump (1), a jet pump (4), and a spray gun (3) are sequentially installed on the conveying pipe along the flow direction of the sludge in the conveying pipe, and the spray gun (3) extends into the combustion furnace of the waste incineration plant; The first valve (5) is installed on the delivery pipe or the spray gun (3) and is used to control the connection 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 in the combustion furnace and is in communication connection with the first valve (5), the injection pump (4), and the screw conveying pump (1), and is used to detect the temperature value in the combustion furnace.

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), wherein the first flow meter (112) and the first pressure gauge (122) are both installed on the delivery pipe and located in the leachate treatment plant, and the first flow meter (112) and the first pressure gauge (122) are both communicatively connected to the screw delivery pump (1), the first flow meter (112) is used to detect the flow value in the delivery pipe, and the first pressure gauge (122) is used to detect the pressure value 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), wherein the second valve (9) is used to control the on and off of the flushing pipe (8), wherein the first end of the flushing pipe (8) is connected to the conveying pipe and is located downstream of the screw conveying pump (1), and the second end of the flushing pipe (8) is 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 pipeline (18), a third valve (6) and a fourth valve (7), wherein the first end of the sludge centrifugal dewatering pipeline (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 pipeline (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 pipeline (18) and the first end of the flushing pipe (8), and 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), wherein the second flow meter (111) and the second pressure gauge (121) are both installed on the delivery pipe and located in the waste incineration plant, and the second flow meter (111) and the second pressure gauge (121) are both communicatively connected to the second valve (9), the second flow meter (111) is used to detect the flow value in the delivery pipe, and the second pressure gauge (121) is used to detect the pressure value in the delivery pipe.

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

8. The sludge treatment equipment according to any one of claims 1 to 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), wherein the first end of the compressed air delivery pipe (13) is connected to the delivery pipe and is located close to the spray gun (3), and 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 to 6, characterized in that: It also includes a cooling air duct (15) and a sixth valve (16) installed on the cooling air duct (15), wherein the first end of the cooling air duct (15) is connected to the conveying pipe and is located close to the spray gun (3), and the second end of the cooling air 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 to 6, characterized in that: It also includes a liquid level switch, which is installed in the sludge tank and is communicatively connected with the screw conveying pump, and is used to detect the sludge liquid level in the sludge tank.

Images