High-temperature sulfur dioxide flue gas cooling device

Abstract

The utility model discloses a high-temperature sulfur dioxide flue gas cooling device which comprises a frame body, a plurality of horizontal pipelines with different heights, a plurality of bent connecting pipelines and a gas outlet pipe, wherein the horizontal pipelines are arranged on the frame body, and two adjacent horizontal pipelines are connected through the bent connecting pipelines; an air inlet is formed in one end of the highest horizontal pipeline; the upper part of the lowest horizontal pipeline far away from the air inlet end is connected with an air outlet pipe; the lower part of the lowest horizontal pipeline far away from the air inlet end is connected with a waste acid deposition container; the waste acid deposition container is connected with a waste acid collecting tank through a waste acid pipeline; a water collecting tank is arranged on the ground at the bottom end of the frame body and is connected with a water accumulating foundation pit outside the water collecting tank on the ground; a plurality of spray heads are arranged above the horizontal pipelines on the frame body, each spray head is connected with a water suction pump through a spraying pipeline, and the water suction pump is connected with the ponding foundation pit through a water suction pipe. The cooling device disclosed by the utility model can be used for quickly cooling high-temperature sulfur dioxide flue gas and discharging acid liquor generated by reaction with moisture in the gas.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to a high-temperature sulfur dioxide fume cooling device. Background Art

[0002] In the process of producing ammonium sulfite salt, sulfur-containing substances are often burned to produce high-temperature sulfur dioxide flue gas. The temperature of sulfur dioxide flue gas is as high as 800°C and contains moisture. The neutralization of sulfur dioxide and ammonia water to produce ammonium sulfite salt is an exothermic reaction, so the temperature of sulfur dioxide flue gas must be reduced. Since there is moisture in the air, there is moisture in the high-temperature sulfur dioxide flue gas. High-temperature sulfur dioxide will react with water to generate a small amount of sulfite acid liquid. Conventional flue gas cooling devices do not take this factor into account. They all pass the flue gas through the cooling device from low to high, causing the high-temperature sulfur dioxide to react with water and the acid generated to slip away with the gas, resulting in unclean flue gas. Summary of the invention

[0003] The utility model aims to provide a high-temperature sulfur dioxide flue gas cooling device to address the deficiencies of the prior art, which can achieve rapid cooling of the high-temperature sulfur dioxide flue gas and remove acid generated by the reaction of the gas with water.

[0004] A high-temperature sulfur dioxide flue gas cooling device, characterized in that it comprises a control device, a frame, a plurality of horizontal pipes of different heights installed on the frame, a plurality of curved connecting pipes, and an air outlet pipe, wherein two adjacent horizontal pipes are connected via the curved connecting pipe; an air inlet is arranged at one end of the highest horizontal pipe; the upper end of the lowest horizontal pipe away from the air inlet is connected to the air outlet pipe; the lower end of the lowest horizontal pipe away from the air inlet is connected to a waste acid deposition container, and the waste acid deposition container is connected to a waste acid collection tank via a waste acid pipeline; an induced draft fan is arranged on the air inlet; a temperature sensor is arranged on the air outlet pipe; and a liquid level sensor is arranged on the waste acid deposition container;

[0005] A water collection tank is provided on the ground at the bottom of the frame, and the water collection tank is connected to a water accumulation pit outside the water collection tank on the ground;

[0006] A number of sprinklers are arranged above each horizontal pipe on the frame, each sprinkler is connected to a water pump through a sprinkler pipe, and the water pump is connected to the water pit through a water pump pipe;

[0007] A control valve is provided on the waste acid pipeline; the control valve, induced draft fan, liquid level sensor and temperature sensor are all connected to the control device.

[0008] The utility model has the following beneficial effects: high-temperature sulfur dioxide flue gas is input from the air inlet, and the sulfur dioxide flue gas is cooled in a cooling pipe composed of a plurality of horizontal pipes with different heights and a plurality of curved connecting pipes, and finally the low-temperature sulfur dioxide gas is discharged from the air outlet pipe. Water is sprayed to the horizontal pipe through a nozzle to cool it down, and the water sprayed by the nozzle is circulated to the nozzle through a water pump. Since the position of the air inlet is higher than the waste acid deposition container, the air outlet pipe is located above the waste acid deposition container, and the acid liquid generated by the reaction of the gas with water can be deposited in the waste acid deposition container, thereby improving the purity of the low-temperature sulfur dioxide gas. The waste acid deposition container is lower than each horizontal pipe, curved connecting pipe, air inlet, and air outlet pipe, and an induced draft fan is used to press the flue gas from a high position down to the waste acid deposition container. In the process of cooling the flue gas, the waste acid deposition effect is good. The control valve, induced draft fan, liquid level sensor, and temperature sensor are all connected to the control device, so that the flow rate of the sulfur dioxide flue gas can be controlled, and the acid liquid can be discharged without affecting the operating pressure of the sulfur dioxide flue gas.

[0009] As a preferred technical solution, the frame includes a plurality of columns, and each horizontal pipe is connected to the columns.

[0010] As a preferred technical solution, the top of each column is connected to the crossbeam.

[0011] As a preferred technical solution, a nozzle is provided above each horizontal pipe on each column.

[0012] As a preferred technical solution, the gas outlet pipe is perpendicular to the ground. This technical solution can improve the collection effect of the waste acid in the waste acid sedimentation container.

[0013] As an optimal technical solution, a three-way connector is provided at the lowest horizontal pipe end away from the air inlet, the waste acid sedimentation container is connected to the lowermost connector of the three-way connector, and the bottom end of the air outlet pipe is connected to the uppermost connector of the three-way connector.

[0014] As a preferred technical solution, the waste acid collection tank is arranged in the waste acid foundation pit, and the waste acid foundation pit is arranged outside the water collection tank on the ground.

[0015] As a preferred technical solution, the water collection tank is connected to the water accumulation pit through a drainage pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a high-temperature sulfur dioxide flue gas cooling device of the utility model.

[0017] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0018] Figure 3 yes Figure 1 A partial enlarged view of part B.

[0019] Figure 4 yes Figure 1 A partial enlarged view of part C.

[0020] Among them: frame-1; horizontal pipe-2; curved connecting pipe-3;

[0021] Exhaust pipe-4; Temperature sensor-41;

[0022] Air inlet-5; induced draft fan-51;

[0023] Waste acid sedimentation container-6; Liquid level sensor-61;

[0024] Waste acid collection tank-7; Waste acid pipeline-8;

[0025] Water collecting tank-9; water accumulation pit-10; sprinkler-11; sprinkler pipe-12; water pump-13; water pump-14; control valve-15; column-16; beam-17; three-way connector-18; waste acid pit-19; drainage pipe-20; waste acid-21; water collecting tank cofferdam-22. DETAILED DESCRIPTION

[0026] Below, the utility model is further described in conjunction with the drawings and embodiments.

[0027] Example 1. Figure 1-4 As shown, a high-temperature sulfur dioxide flue gas cooling device is characterized in that it includes a control device, a frame 1, five horizontal pipes 2 of different heights installed on the frame 1, four dry bend connecting pipes 3, and an air outlet pipe 4, wherein two adjacent horizontal pipes 2 are connected via the bend connecting pipe 3; an air inlet 5 is provided at the right end of the highest horizontal pipe 2; the upper left end of the lowest horizontal pipe 2 is connected to the air outlet pipe 4; the lower left end of the lowest horizontal pipe 2 is connected to a waste acid deposition container 6, and the waste acid deposition container 6 is connected to a waste acid collecting tank 7 via a waste acid pipeline 8; an induced draft fan 51 is provided on the air inlet 5; a temperature sensor 41 is provided on the air outlet pipe 4; and a liquid level sensor 61 is provided on the waste acid deposition container 6.

[0028] A water collecting trough 9 is provided on the ground at the bottom end of the frame 1, and the water collecting trough 9 is connected to a water accumulation foundation pit 10 provided outside the water collecting trough 9 on the ground.

[0029] A nozzle 11 is provided above each horizontal pipe 2 on the frame 1 , and each nozzle 11 is connected to a water pump 13 through a spray pipeline 12 , and the water pump 13 is connected to the water accumulation pit 10 through a water pumping pipe 14 .

[0030] The waste acid pipeline 8 is provided with a control valve 15; the control valve 15, the induced draft fan 51, the liquid level sensor 61, and the temperature sensor 41 are all connected to the control device. When the liquid level sensor 61 measures that the liquid level of the waste acid exceeds the set value, the control valve 15 opens. The flow rate of the flue gas is controlled by the induced draft fan 51.

[0031] The frame 1 includes four columns 16 , and each horizontal pipe 2 is connected to the column 16 .

[0032] The top of each column 16 is connected to the crossbeam 17 .

[0033] A nozzle 11 is provided above each horizontal pipe 2 on each column 16 .

[0034] The gas outlet pipe 4 is perpendicular to the ground. By adopting this technical solution, the collection effect of the waste acid in the waste acid sedimentation container 6 can be improved.

[0035] The left end of the lowest horizontal pipeline 2 is provided with a three-way connector 18, the waste acid deposition container 6 is connected to the lowest connection port of the three-way connector 18, and the bottom end of the gas outlet pipe 4 is connected to the uppermost connection port of the three-way connector 18. The interface at the right end of the three-way connector 18 is connected to the lowest horizontal pipeline 2.

[0036] The waste acid collecting tank 7 is arranged in the waste acid foundation pit 19, and the waste acid foundation pit 19 is arranged on the left side of the water collecting tank 9 on the ground.

[0037] The water collecting tank 9 is connected to the water accumulation pit 10 through a drainage pipe 20. The water accumulation pit 10 is arranged on the right side of the water collecting tank 9 on the ground.

[0038] Five horizontal pipes 2 at different heights and four curved connecting pipes 3 form a connected cooling pipe system. High-temperature sulfur dioxide flue gas is input from the air inlet 5, and the sulfur dioxide flue gas is cooled in a cooling pipe composed of several horizontal pipes 2 at different heights and several curved connecting pipes 3, and finally the low-temperature sulfur dioxide gas is discharged from the outlet pipe 4. Water is sprayed to the horizontal pipe 2 through the nozzle 11 to cool it down, and the water sprayed by the nozzle 11 is circulated to the nozzle through the water pump 13. Since the position of the air inlet 5 is higher than the waste acid deposition container 6, the outlet pipe 4 is located above the waste acid deposition container 6, and the acid liquid generated by the reaction of the gas with water can be deposited in the waste acid deposition container 6, thereby improving the purity of the low-temperature sulfur dioxide gas. The waste acid deposition container 6 is lower than each horizontal pipe 2, curved connecting pipe 3, air inlet 5, and outlet pipe 4. The exhaust fan 51 is used to press the flue gas from a high position down to the waste acid deposition container 6. In the process of cooling the flue gas, the waste acid deposition effect is good. The control valve 15, the induced draft fan 51, the liquid level sensor 61 and the temperature sensor 41 are all connected to the control device, which can control the flow rate of the sulfur dioxide flue gas and discharge the acid liquid without affecting the operating pressure of the sulfur dioxide flue gas.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes to the technical solution and the inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-temperature sulfur dioxide flue gas cooling device, characterized in that: The invention comprises a control device, a frame (1), a plurality of horizontal pipes (2) of different heights installed on the frame (1), a plurality of curved connecting pipes (3), and an air outlet pipe (4), wherein two adjacent horizontal pipes (2) are connected via the curved connecting pipe (3); an air inlet (5) is provided at one end of the highest horizontal pipe (2); the upper end of the lowest horizontal pipe (2) away from the air inlet (5) is connected to the air outlet pipe (4); the lower end of the lowest horizontal pipe (2) away from the air inlet (5) is connected to a waste acid deposition container (6), and the waste acid deposition container (6) is connected to a waste acid collection tank (7) via a waste acid pipeline (8); an induced draft fan (51) is provided on the air inlet (5); a temperature sensor (41) is provided on the air outlet pipe (4); and a liquid level sensor (61) is provided on the waste acid deposition container (6); A water collecting trough (9) is provided on the ground at the bottom end of the frame (1), and the water collecting trough (9) is connected to a water accumulation pit (10) provided outside the water collecting trough (9) on the ground; A plurality of nozzles (11) are provided above each horizontal pipe (2) on the frame (1), each nozzle (11) is connected to a water pump (13) via a spray pipe (12), and the water pump (13) is connected to the water accumulation pit (10) via a water pump pipe (14); A control valve (15) is provided on the waste acid pipeline (8); the control valve (15), the induced draft fan (51), the liquid level sensor (61), and the temperature sensor (41) are all connected to the control device.

2. A high-temperature sulfur dioxide flue gas cooling device as claimed in claim 1, characterized in that: The frame (1) comprises a plurality of columns (16), and each horizontal pipe (2) is connected to the columns (16).

3. A high-temperature sulfur dioxide flue gas cooling device as claimed in claim 2, characterized in that: The top end of each column (16) is connected to the crossbeam (17).

4. A high-temperature sulfur dioxide flue gas cooling device as claimed in claim 3, characterized in that: A nozzle (11) is provided above each horizontal pipe (2) on each column (16).

5. A high-temperature sulfur dioxide flue gas cooling device as claimed in claim 1, characterized in that: The air outlet pipe (4) is perpendicular to the ground.

6. A high-temperature sulfur dioxide flue gas cooling device as claimed in claim 5, characterized in that: A three-way connector (18) is provided at the end of the lowest horizontal pipeline (2) away from the air inlet (5), the waste acid sedimentation container (6) is connected to the lowermost connector of the three-way connector (18), and the bottom end of the air outlet pipe (4) is connected to the uppermost connector of the three-way connector (18).

7. A high-temperature sulfur dioxide flue gas cooling device as claimed in claim 1, characterized in that: The waste acid collection tank (7) is arranged in the waste acid foundation pit (19), and the waste acid foundation pit (19) is arranged outside the water collection tank (9) on the ground.

8. A high-temperature sulfur dioxide flue gas cooling device as claimed in claim 1, characterized in that: The water collection tank (9) is connected to the water accumulation pit (10) via a drainage pipe (20).

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