High-efficiency condensing desulfurization and demisting device

Abstract

The utility model discloses a high -efficient condensing type desulfurization demisting device, including a plurality of demisters, at least one condensing module and a plurality of V type tanks, the demister is by upper and lower interval arrangement in proper order, and is equipped with the condensing module between at least one adjacent two demisters, the water inlet of condensing module is linked with the flush pipe, and the water outlet of condensing module is linked with the backwater pipe, and the below of the demister of the lowermost is interval arranged V type tank from front to back in proper order, V type tank is linked with the backwater pipe, compared with prior art, can low load, when the smoke flow rate reduces, guarantees the removal ability of demister to the liquid drop in the smoke.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas desulfurization, and in particular to the technical field of a high-efficiency condensation desulfurization and demisting device. Background Technology

[0002] With the continuous increase in global greenhouse gas emissions and climate warming, the global goal of achieving carbon peaking and carbon neutrality has been proposed to mitigate the impact of climate change. my country regards this as an important national development goal and has proposed the "3060" target, thus promoting a large number of new energy sources to replace traditional coal-fired power generation. At the same time, it further requires coal-fired units to be the main force for peak shaving, resulting in a large number of coal-fired units operating at low loads. Demister devices are an important component of wet desulfurization systems. Current demisters are simply existing in the form of ridge type, tube bundle type, tubular type, and plate type, and the flushing water directly enters the absorption tower system. Under low load conditions, the existing demister equipment cannot guarantee the stable operation of the desulfurization system. This is mainly manifested in the following ways: the water spray volume during demister flushing is too large, which makes it impossible to maintain the water balance of the desulfurization system; at low loads, the flow velocity through the demister decreases, causing it to be unable to capture droplets properly, resulting in excessive dust. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and propose a high-efficiency condensing desulfurization and demister device that can ensure the demister's ability to remove liquid droplets from the flue gas even under low load and reduced flue gas velocity.

[0004] To achieve the above objectives, this utility model proposes a high-efficiency condensing desulfurization and demisting device, comprising several demisters, at least one condensing module, and several V-shaped grooves. The demisters are arranged at intervals from top to bottom, and a condensing module is provided between at least two adjacent demisters. The inlet of the condensing module is connected to a flushing pipe, and the outlet of the condensing module is connected to a return water pipe. V-shaped grooves are arranged at intervals from front to back below the lowest demister, and the V-shaped grooves are connected to the return water pipe.

[0005] Preferably, each of the V-shaped grooves is fixed with a round pipe by several steel pipes, and the two ends of the round pipe pass through the corresponding groove wall of the V-shaped groove and are fixedly connected to the desulfurization tower body.

[0006] Preferably, a gap is reserved between each V-groove to ensure that the flow area of ​​the entire cross-section is not less than 50%.

[0007] Preferably, the system further includes a clarification and separation tank, which is equipped with a partition to divide its interior into a clarification zone and a clear water zone. The upper end of the partition is provided with a serrated overflow port. The clarification zone is provided with an inclined filter membrane, and the output end of the return water pipe passes through the filter membrane.

[0008] Preferably, the filter diaphragm is made of interwoven metal strips with a weave hole side length of 5-10 mm and an opening rate of 30%-40%. The height of the serrated overflow outlet is not less than 300 mm and the angle is 60°±5°.

[0009] Preferably, the bottom of both the clarification zone and the clear water zone is conical, and the inclination angle of the cone is 50° to 70°.

[0010] Preferably, the bottom of the clarification zone is connected to the desulfurization tower body through a connecting pipe, and a valve is provided on the connecting pipe. The bottom of the clear water zone is connected to the input end of the water pump, and the output end of the water pump is connected to the flushing pipe through the condenser. The spray pipes of the demister are all connected to the flushing pipe.

[0011] Preferably, the opening angle of the V-groove is 80° to 120°.

[0012] Preferably, the condensation module includes several condenser tubes, an inlet pipe, and an outlet pipe. The two ends of the condenser tubes are connected to the inlet pipe and the outlet pipe, respectively. The condenser tubes are serpentine cooling water pipes or serpentine coils.

[0013] Preferably, the bottom of the V-shaped groove is provided with a drainage groove, the bottom of the drainage groove is inclined, the angle between the bottom of the drainage groove and the horizontal plane is 10 to 20°, the lower end of the bottom of the drainage groove is connected to the manifold through a drainage pipe, and the manifold is connected to the return water pipe.

[0014] The beneficial effects of this utility model are as follows: The condenser module of this utility model uses a low-temperature fluid inside its pipes, while the high-temperature flue gas passes through the outside of the condenser tube. The condensed mist collides with the mist droplets in the flue gas, agglomerating into large droplets, thus ensuring dust removal at the outlet. A V-shaped groove is set at the bottom layer, which not only removes large droplets from the flue gas but also collects the demister's flushing water for organized recycling, saving water resources. Compared with existing technologies, this utility model can maintain the demister's ability to remove droplets from the flue gas even under low load and reduced flue gas velocity.

[0015] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a high-efficiency condensation desulfurization and demisting device according to this utility model; Figure 2 This is a side view of the V-groove; Figure 3 This is a schematic diagram showing a serrated overflow port on the partition.

[0017] In the diagram: 1-Demister, 2-Condensation module, 3-V-shaped groove, 4-Flush pipe, 5-Return water pipe, 6-Steel pipe, 7-Round pipe, 8-Desulfurization tower body, 9-Clarification separation tank, 10-Baffle plate, 11-Clarification zone, 12-Clear water zone, 13-Filtration inclined diaphragm, 14-Sawtooth overflow port, 15-Connecting pipe, 16-Water pump, 17-Condenser, 18-Spray pipe, 19-Valve, 21-Condensation pipe, 22-Inlet pipe, 23-Outlet pipe, 31-Drainage trough, 32-Drainage pipe, 33-Manifold. Detailed Implementation

[0018] See Figure 1 , Figure 2 and Figure 3 This utility model discloses a high-efficiency condensing desulfurization and demisting device, comprising a plurality of demisters 1, at least one condensing module 2, and a plurality of V-shaped grooves 3. The demisters 1 are arranged at intervals from top to bottom, and at least one condensing module 2 is provided between two adjacent demisters 1. The water inlet of the condensing module 2 is connected to the flushing pipe 4, and the water outlet of the condensing module 2 is connected to the return water pipe 5. The bottommost demister 1 is provided with V-shaped grooves 3 arranged at intervals from front to back, and the V-shaped grooves 3 are connected to the return water pipe 5.

[0019] Each of the V-shaped grooves 3 is fixed with a round pipe 7 by several steel pipes 6. The two ends of the round pipe 7 pass through the corresponding groove wall of the V-shaped groove 3 and are fixedly connected to the desulfurization tower body 8, which can ensure good fixation reliability of the V-shaped groove.

[0020] A gap is reserved between each V-groove to ensure that the flow area of ​​the entire cross section is not less than 50%.

[0021] It also includes a clarification and separation tank 9, which is provided with a partition 10 to divide its interior into a clarification zone 11 and a clear water zone 12. The upper end of the partition 10 is provided with a sawtooth overflow port 14. The clarification zone 11 is provided with an inclined filter membrane 13, and the output end of the return water pipe 5 passes through the filter membrane 13.

[0022] The filter diaphragm 13 is made of interwoven metal strips with a weave hole side length of 5-10mm and an opening rate of 30%-40%. The serrated overflow port 14 has a serration height of not less than 300mm and an angle of 60°±5°.

[0023] The bottoms of both the clarification zone 11 and the clear water zone 12 are conical, and the inclination angle of the cone is 50° to 70°.

[0024] The bottom of the clarification zone 11 is connected to the desulfurization tower body 8 through a connecting pipe 15. A valve 19 is provided on the connecting pipe 15. The bottom of the clear water zone 12 is connected to the input end of the water pump 16. The output end of the water pump 16 is connected to the flushing pipe 4 through the condenser 17. The spray pipes 18 of the demister 1 are all connected to the flushing pipe 4.

[0025] The opening angle of the V-groove 3 is 80° to 120°.

[0026] The condensation module 2 includes several condenser pipes 21, a water inlet pipe 22 and a water outlet pipe 23. The two ends of the condenser pipe 21 are connected to the water inlet pipe 22 and the water outlet pipe 23 respectively. The condenser pipe 21 is a serpentine cooling water pipe or a serpentine coil.

[0027] The bottom of the V-shaped groove 3 is provided with a drainage groove 31. The bottom of the drainage groove 31 is inclined and the angle between the bottom of the drainage groove 31 and the horizontal plane is 10 to 20°. The lower end of the bottom of the drainage groove 31 is connected to the manifold 33 through the drainage pipe 32. The manifold 33 is connected to the return water pipe 5.

[0028] The condenser tubes of the condenser module 2 are made of ultra-thin corrosion-resistant metal tubes or hoses with a diameter of φ6 to φ10 mm. The condenser tubes are arranged in a serpentine and cross pattern, and the distance between the tube walls is controlled between 5 mm and φ10 mm.

[0029] The working process of this utility model: In the operation of this utility model of a high-efficiency condensing desulfurization and demisting device, the clean water in the clean water zone 12 is pumped to the condenser 17 by the water pump 16 for cooling. The temperature drops to 20°C. The cooled clean water enters the flushing pipe 4, then the inlet pipe 22 and the spray pipe 18. The clean water output from the inlet pipe 22 passes through the condenser pipe 21 and the outlet pipe 23 in sequence and enters the return pipe 5. The clean water in the spray pipe 18 is sprayed out through the flushing nozzle on it. After falling, it is collected through the V-shaped groove 3, and then passes through the drain trough 31, the drain pipe 32 and the manifold 33 in sequence and enters the return pipe 5. The recovered liquid output from the return pipe 5 enters the clarification zone 11. The recovered liquid is filtered by sedimentation and the inclined diaphragm 13. The clean supernatant in the upper part of the clarification zone overflows into the clean water zone 12 on the rear side through the sawtooth overflow port 14. When the turbid liquid deposited at the bottom needs to be discharged, the valve 19 is opened and discharged back to the desulfurization tower body 8.

[0030] The collected turbid water is purified into recyclable rinsing water through physical sedimentation and filtration with inclined diaphragm. The retention time of the turbid water in the clarified area is not less than 2 hours.

[0031] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A high-efficiency condensing desulfurization and demisting device, characterized in that: It includes several demisters (1), at least one condenser module (2) and several V-shaped grooves (3). The demisters (1) are arranged at intervals from top to bottom. At least one condenser module (2) is provided between two adjacent demisters (1). The inlet of the condenser module (2) is connected to the flushing pipe (4). The outlet of the condenser module (2) is connected to the return water pipe (5). The bottommost demister (1) is provided with V-shaped grooves (3) arranged at intervals from front to back. The V-shaped grooves (3) are connected to the return water pipe (5).

2. The high-efficiency condensing desulfurization and demisting device as described in claim 1, characterized in that: The V-shaped groove (3) is fixed with a round pipe (7) by several steel pipes (6), and the two ends of the round pipe (7) pass through the corresponding groove wall of the V-shaped groove (3) and are fixedly connected to the desulfurization tower body (8).

3. The high-efficiency condensing desulfurization and demisting device as described in claim 1, characterized in that: A gap is reserved between each V-groove to ensure that the flow area of ​​the entire cross section is not less than 50%.

4. The high-efficiency condensing desulfurization and demisting device as described in claim 1, characterized in that: It also includes a clarification separation tank (9), which is provided with a partition (10) to divide its interior into a clarification zone (11) and a clear water zone (12). The upper end of the partition (10) is provided with a sawtooth overflow port (14). The clarification zone (11) is provided with an inclined filter membrane (13), and the output end of the return water pipe (5) passes through the filter membrane (13).

5. The high-efficiency condensing desulfurization and demisting device as described in claim 4, characterized in that: The filter diaphragm (13) is made of interwoven metal strips with a weaving hole side length of 5-10 mm and an opening rate of 30%-40%. The serrated overflow port (14) has a serration height of not less than 300 mm and an angle of 60°±5°.

6. The high-efficiency condensing desulfurization and demisting device as described in claim 4, characterized in that: The bottom of both the clarification zone (11) and the clear water zone (12) is conical, and the inclination angle of the cone is 50° to 70°.

7. The high-efficiency condensing desulfurization and demisting device as described in claim 6, characterized in that: The bottom of the clarification zone (11) is connected to the desulfurization tower body (8) through a connecting pipe (15). A valve (19) is provided on the connecting pipe (15). The bottom of the clear water zone (12) is connected to the input end of the water pump (16). The output end of the water pump (16) is connected to the flushing pipe (4) through a condenser (17). The spray pipe (18) of the demister (1) is connected to the flushing pipe (4).

8. The high-efficiency condensing desulfurization and demisting device as described in claim 1, characterized in that: The opening angle of the V-groove (3) is 80° to 120°.

9. The high-efficiency condensing desulfurization and demisting device as described in claim 1, characterized in that: The condensation module (2) includes several condenser pipes (21), water inlet pipes (22) and water outlet pipes (23). The two ends of the condenser pipes (21) are connected to the water inlet pipes (22) and the water outlet pipes (23) respectively. The condenser pipes (21) are serpentine cooling water pipes or serpentine coils.

10. A high-efficiency condensing desulfurization and demisting device as described in any one of claims 1 to 9, characterized in that: The bottom of the V-shaped groove (3) is provided with a drainage groove (31). The bottom of the drainage groove (31) is inclined. The angle between the bottom of the drainage groove (31) and the horizontal plane is 10 to 20°. The lower end of the bottom of the drainage groove (31) is connected to the manifold (33) through the drainage pipe (32). The manifold (33) is connected to the return water pipe (5).

Images