Industrial gas cooling tower

Abstract

The utility model discloses an industrial gas cooling tower which comprises a heat exchanger, an acid distribution tank, a filler, an inclined slurry partition plate, a circulating pump, a downcomer, a filter press, a slurry pump, a slurry guide plate, an inlet flue, a filler supporting plate and an outlet flue. The filler is stacked at the upper part of the filler support plate and the lower part of the acid distribution tank to form a filler section; high-temperature flue gas enters the cooling tower through the inlet flue and is in reverse contact with the low-temperature circulating liquid at the filler, so that heat transfer reaction is realized. The inclined slurry partition plate exchanges the flow guide gas, and then the liquid flows to the bottom of the tower and flows to a slurry pump under the action of the slurry flow guide plate. After slurry is conveyed to the filter press through the slurry pump for filtration, filtrate is conveyed to an inlet of the heat exchanger. In the whole cooling process, the mine dust removal effect of the whole gas cooling tower is achieved through gravity natural sedimentation, flow guide and enrichment and continuous conveying and filtering, the blockage condition of the heat exchanger and the filler can be effectively reduced through circulating liquid with the relatively low mine dust content, and the efficient heat exchange effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to a flue gas cooling device, in particular to an industrial gas cooling tower. Background Art

[0002] A gas cooling tower is usually called a packing tower because it is filled with plastic packing inside. As the basic component for gas-liquid contact and mass transfer, the liquid flows downward in a film shape on the surface of the packing, and the gas flows upward continuously in a continuous phase and countercurrently with the liquid, and mass transfer and heat transfer occur between the gas and the liquid phases. The packing tower belongs to a differential contact type gas-liquid mass transfer device. The heat of the flue gas is transferred to the circulating liquid and carried out by the circulating liquid, and heat transfer is carried out with the circulating water in a plate heat exchanger, and then the circulating water is taken to a cooling tower for cooling.

[0003] When cooling acidic or alkaline gases, plastic packing is generally selected. The plastic packing has good corrosion resistance and can resist the corrosion of general inorganic acids, alkalis and organic solvents. The plastic packing is light in weight, inexpensive, has good toughness, is impact-resistant and not easy to break, etc. Some impurities entering the gas cooling tower are mostly contained in the acid mist. After long-term use, the mineral dust in the flue gas will accumulate on the packing, reducing the flux and increasing the resistance, and it needs to be dug out and cleaned regularly. And a large amount of mineral dust accumulates in the tower, and the rise of the mud line causes the liquid level gauge to be inaccurate. The mineral dust with a large density accumulates at the bottom and has a large pressure impact on the wall of the gas cooling tower, and liquid leakage will occur in the long term.

[0004] The circulating liquid carries a large amount of mineral dust liquid and accumulates in the plate heat exchanger, affecting the heat exchange effect. It is necessary to frequently disassemble and clean the plate heat exchanger. There are about 300 plates in the plate heat exchanger. After cleaning, the sealing gaskets between the plates need to be replaced, and the maintenance cost is high and the labor intensity of workers is large. It is also necessary to clean the accumulated minerals in the tower trough once a year. Dozens of people need to enter for cleaning for a week, which poses safety and production hazards.

[0005] Therefore, how to reduce the mineral dust content in the gas cooling tower as much as possible is a problem worthy of study. Content of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide an industrial gas cooling tower that reduces the mineral dust content in the tower.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] An industrial gas cooling tower, comprising a tower body, a heat exchanger and a filter press. The middle part of the side wall of the tower body is provided with an inlet flue, the top of the tower body is provided with an outlet flue, a acid distribution tank is arranged in the upper part of the tower body, a packing support plate is arranged below the acid distribution tank, packing is piled on the upper part of the packing support plate and the lower part of the acid distribution tank, an inclined mud partition plate is arranged below the packing support plate, a downcomer group is arranged below the inclined mud partition plate, an inclined mud guiding plate is arranged at the bottom of the tower body, a horizontal outlet pipe is arranged at the high-temperature medium outlet of the upper part of the heat exchanger, the outlet pipe extends into the tower body and is connected with the acid distribution tank, the inlet flue is located below the packing support plate and above the inclined mud partition plate, a clear liquid outlet is arranged on the side wall of the tower body between the downcomer group and the inclined mud partition plate, a clear liquid pipe is arranged at the clear liquid outlet, the clear liquid pipe is connected with the high-temperature medium inlet of the lower part of the heat exchanger, a mud outlet is arranged at the bottom of the side wall of the tower body, the mud outlet is connected with the filter press through a mud pipe, the liquid outlet of the filter press is connected in parallel with the clear liquid pipe through a pipe, and the lower side of the mud guiding plate is located at the mud outlet.

[0009] Further, the inclined mud partition plate comprises an inclined plate and a vertical plate. The inclined plate is a circular plate with a notch, and the notch is located on the lower side. The vertical plate is connected with the notch, and the cross-sectional shape of the vertical plate is the same as that of the notch. The vertical plate extends downward, and the bottom is flush with the lower end surface of the downcomer group.

[0010] Further, the downcomer group is located below the inclined plate and is composed of a plurality of downcomers. The adjacent downcomers are fixedly connected, and the downcomer group is fixed on the inner wall of the tower body.

[0011] Further, the heat exchanger is a plate heat exchanger.

[0012] Further, a circulating pump is arranged on the clear liquid pipe so that the upper clear liquid is conveyed to the heat exchanger through the circulating pump.

[0013] Further, a mud pump is arranged on the mud pipe so that the mud is conveyed to the filter press through the mud pump.

[0014] The high-temperature flue gas enters the cooling tower through the inlet flue and contacts the low-temperature circulating liquid reversely in the packing to achieve heat transfer reaction. The inclined mud partition plate guides the liquid flow after the gas exchange to the bottom of the tower, and under the action of the mud guiding plate, it flows to the mud pump. The mud is conveyed to the filter press through the mud pump for filtration, and the filtrate is sent to the inlet of the plate heat exchanger. The mud forms a layer in the downcomer due to gravity, the upper clear liquid is concentrated at the circulating pump, and the dust is concentrated at the mud pump. The upper clear liquid is conveyed to the inlet of the plate heat exchanger through the circulating pump. After the filtrate and the upper clear liquid are cooled by the plate heat exchanger, they are sent to the acid distribution tank for liquid separation and then flow into the packing section. The packing section is filled with liquid and contacts the high-temperature flue gas entering through the inlet flue reversely to achieve heat transfer reaction. The cooled flue gas is sent out through the outlet flue.

[0015] During the entire cooling process, through natural sedimentation and gravity diversion enrichment, continuous transportation and filtration are carried out to achieve the removal effect of mineral dust in the entire gas cooling tower. For the circulating liquid with relatively low mineral dust content, it can effectively reduce the blockage of the plate heat exchanger and plastic packing, ensuring efficient heat exchange. Moreover, it delays the cleaning cycle of the tower trough and eliminates safety and production hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view schematic diagram of the industrial new gas cooling tower of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions of the present utility model will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present utility model is not limited thereto.

[0018] An industrial gas cooling tower, as Figure 1 shown, includes a plate heat exchanger 1, a circulation pump 5, a filter press 7, a slurry pump 8, and a tower body 13. An inlet flue 10 is provided in the middle of the side wall of the tower body 13, an outlet flue 12 is provided at the top of the tower body 13, a sub-acid tank 2 is provided in the upper part of the tower body, a packing support plate 11 is provided below the sub-acid tank 2, and packing 3 is stacked above the packing support plate 11 and below the sub-acid tank 2 to form a packing section. An inclined slurry partition plate 4 is provided below the packing support plate 11, a downcomer group 6 is provided below the inclined slurry partition plate 4, and an inclined slurry guide plate 9 is provided at the bottom of the tower body 13. A horizontal outlet pipe is provided at the upper high-temperature medium outlet of the plate heat exchanger 1, and the outlet pipe extends into the tower body 13 and is connected to the sub-acid tank 2. The inlet flue 10 is located below the packing support plate 11 and above the inclined slurry partition plate 4. A clear liquid outlet is provided on the side wall of the tower body between the downcomer group 6 and the inclined slurry partition plate 4. A clear liquid pipe is provided at the clear liquid outlet, and the clear liquid pipe is provided with a circulation pump 5 and the clear liquid pipe is connected to the lower high-temperature medium inlet of the plate heat exchanger 1 so that the clear liquid is transported to the plate heat exchanger 1 through the circulation pump 5. A slurry outlet is provided at the bottom of the side wall of the tower body 13, and the slurry outlet is connected to the filter press 7 through a slurry pipe and a slurry pump 8 provided on the slurry pipe so that the slurry is transported to the filter press 7 through the slurry pump 8. The liquid outlet of the filter press 7 is connected in parallel to the clear liquid pipe through a pipe, and the lower side of the slurry guide plate 9 is located at the slurry outlet.

[0019] Among them, the inclined slurry partition plate 4 includes an inclined plate and a vertical plate. The inclined plate is a circular plate with a notch, and the notch is located on the lower side. The vertical plate is connected to the notch, and the cross-sectional shape of the vertical plate is the same as the shape of the notch. The vertical plate extends downward, and the bottom is flush with the lower end surface of the downcomer group 6.

[0020] The downcomer group 6 is located below the inclined plate and is composed of several downcomers. The adjacent downcomers are fixedly connected, and the downcomer group 6 is fixed on the inner wall of the tower body 13.

[0021] The filler 3 is a plastic filler.

[0022] The high-temperature flue gas enters the tower body 13 through the inlet flue 10 and contacts the low-temperature circulating liquid reversely in the filler 3 to achieve heat transfer reaction.

[0023] The inclined mud partition plate 4 deflects the liquid flowing after the diversion gas exchange to the bottom of the tower and, under the action of the mud guide plate 9, flows to the mud pump 8. The mud is transported by the mud pump 8 to the filter press 7 for filtration, and the filtrate is sent to the inlet of the plate heat exchanger 1.

[0024] The mud forms a layer in the downcomer 6 due to gravity. The upper clear liquid is enriched at the circulating pump 5, and the dust is enriched at the mud pump 8.

[0025] The upper clear liquid is sent to the inlet of the plate heat exchanger 1 by the circulating pump 5.

[0026] The filtrate and the upper clear liquid are cooled by the plate heat exchanger 1, then pumped into the acid separation tank 2 for liquid separation, and then flow into the packing section. The plastic filler 3 is covered with liquid and contacts the high-temperature flue gas entering through the inlet flue 10 reversely to achieve heat transfer reaction.

[0027] The cooled flue gas is sent out through the outlet flue 12.

[0028] During the whole cooling process, through gravity natural sedimentation diversion and enrichment, continuous transportation and filtration, the dust removal effect of the whole gas cooling tower is achieved. For the circulating liquid with relatively low dust content, the blockage of the plate heat exchanger and the plastic filler can be effectively reduced, and the high-efficiency heat exchange effect can be ensured. Moreover, the cleaning cycle of the tower tank is delayed, and the safety and production hazards are eliminated.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the specific implementation technical solutions of the present invention rather than to limit it. Those of ordinary skill in the art should understand that any equivalent substitution or obvious modification of the implementation mode of the present invention without changing its performance or use should be covered within the scope of protection claimed by the present invention.

Claims

1. An industrial gas cooling tower, comprising a tower body, a heat exchanger and a filter press, characterized in that: An inlet flue is provided in the middle of the side wall of the tower body, an outlet flue is provided on the top of the tower body, an acid separation tank is provided in the upper part of the tower body, a filler support plate is provided below the acid separation tank, fillers are accumulated on the upper part of the filler support plate and the lower part of the acid separation tank, an inclined mud partition plate is provided below the filler support plate, a downcomer group is provided below the inclined mud partition plate, an inclined mud guide plate is provided at the bottom of the tower body, an outlet pipe is horizontally provided at the upper high-temperature medium outlet of the heat exchanger, the outlet pipe extends into the tower body and is connected to the acid separation tank, the inlet flue is located below the filler support plate and above the inclined mud partition plate, a clear liquid outlet is provided on the side wall of the tower body between the downcomer group and the inclined mud partition plate, a clear liquid outlet is provided with a clear liquid pipeline, the clear liquid pipeline is connected to the lower high-temperature medium inlet of the heat exchanger, a mud outlet is provided at the bottom of the side wall of the tower body, the mud outlet is connected to the filter press through the mud pipeline, the liquid outlet of the filter press is connected to the clear liquid pipeline in parallel through a pipeline, and the lower side of the mud guide plate is located at the mud outlet.

2. The industrial gas cooling tower according to claim 1, characterized in that: The inclined mud separator includes an inclined plate and a vertical plate. The inclined plate is a circular plate with a notch, and the notch is located on the lower side. The vertical plate is connected to the notch, and the shape of the cross section of the vertical plate is consistent with the shape of the notch. The vertical plate extends downward, and the bottom is flush with the lower end surface of the downcomer group.

3. The industrial gas cooling tower according to claim 2, characterized in that: The downcomer group is located below the inclined plate and is composed of a plurality of downcomers. Adjacent downcomers are fixedly connected, and the downcomer group is fixed on the inner wall of the tower body.

4. The industrial gas cooling tower according to claim 1, characterized in that: The heat exchanger is a plate heat exchanger.

5. The industrial gas cooling tower according to claim 1, characterized in that: A circulation pump is provided on the clear liquid pipeline so that the upper clear liquid is transported to the heat exchanger through the circulation pump.

6. The industrial gas cooling tower according to claim 1, characterized in that: A mud pump is provided on the mud pipeline so that the mud is transported to the filter press through the mud pump.

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