CN211328769U - Flue gas treatment system of thermal power factory - Google Patents
Flue gas treatment system of thermal power factory Download PDFInfo
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- CN211328769U CN211328769U CN201922011034.1U CN201922011034U CN211328769U CN 211328769 U CN211328769 U CN 211328769U CN 201922011034 U CN201922011034 U CN 201922011034U CN 211328769 U CN211328769 U CN 211328769U
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- flue gas
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- condensed water
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 239000003546 flue gas Substances 0.000 title claims abstract description 177
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000000926 separation method Methods 0.000 claims abstract description 44
- 238000005507 spraying Methods 0.000 claims abstract description 44
- 239000000498 cooling water Substances 0.000 claims abstract description 34
- 239000007921 spray Substances 0.000 claims abstract description 30
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims description 15
- 238000006477 desulfuration reaction Methods 0.000 claims description 7
- 230000023556 desulfurization Effects 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000000779 smoke Substances 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 9
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of boiler flue gas treatment, and discloses a flue gas treatment system of a thermal power plant, which sprays cooling water from top to bottom through a spraying unit to spray flue gas discharged by a desulfurizing tower, because the temperature of the cooling water is far lower than the temperature of the flue gas discharged by the desulfurizing tower, when the flue gas discharged by the desulfurizing tower enters a shell, the cooling water is contacted with the cooling water sprayed by the spraying unit, wet flue gas is formed to reduce the temperature of the flue gas, the wet flue gas is condensed on a flue gas separation unit through the flue gas separation unit to form condensed water, flows downwards along the trend and finally flows into a condensed water collection unit through a condensed water outlet to achieve the purpose of reducing smoke plume, soluble substances in the flue gas are dissolved in water at the same time, the content of pollutants in the flue gas is reduced, and the flue gas after the flue gas separation is sent to a demister to remove most water drops carried in the flue gas discharged by a flue gas condenser, thereby reducing the humidity of the smoke and improving the smoke plume eliminating effect.
Description
Technical Field
The utility model relates to a boiler flue gas handles technical field, especially relates to a flue gas processing system of thermal power factory.
Background
A desulfurization device is arranged between a chimney and a boiler in a thermal power plant to carry out desulfurization treatment on flue gas discharged by the boiler, wherein most of the desulfurization devices are wet limestone-gypsum desulfurization devices. The flue gas discharged from the chimney after being desulfurized by the desulfurizing tower is in a saturated state, and after the flue gas leaves the chimney, the temperature of the flue gas is rapidly cooled by the atmospheric environment, and meanwhile, the components in the flue gas are subjected to mass exchange with the atmosphere. In this process, condensation of water vapor occurs when the temperature of the water vapor is below the dew point temperature corresponding to its partial pressure. The water vapor in the smoke generates supersaturation and is atomized into water drops, and the water drops generate scattered reflection under the irradiation of light rays so as to generate the phenomenon of white smoke.
At present, two conventional methods for reducing smoke plume are available, namely condensing and heating smoke, and the mode of heating smoke has the defect of higher energy consumption, only has visual effect and lacks practical environmental protection benefit; at present, the heat exchanger is usually adopted to condense the flue gas, but because the latent heat of vaporization of water vapor in the flue gas is large, the heat exchange amount of condensation and heat exchange by the heat exchanger is large, and the heat exchanger is expensive.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flue gas processing system of thermal power factory can reduce power consumption and cost when eliminating the plume.
To achieve the purpose, the utility model adopts the following technical proposal:
a flue gas treatment system of a thermal power plant comprises a desulfurizing tower, a flue gas condenser, a demister and a chimney, wherein the desulfurizing tower is used for desulfurizing flue gas discharged by a boiler;
the flue gas condenser comprises a vertically arranged shell, the upper part of the shell is provided with a cooling water inlet, the bottom of the shell is provided with a condensed water outlet, and a spray pump and a condensed water collecting unit communicated with the condensed water outlet are arranged outside the shell; be equipped with in the casing from top to bottom and distribute:
the spray unit is used for spraying cooling water to condense wet flue gas in the flue gas discharged by the desulfurization tower to form condensed water, the spray unit comprises a spray pipe communicated with an outlet of the spray pump, a plurality of water spray holes are formed in the spray pipe, and the distance between the central axis of each water spray hole and a vertical line passing through the central axis of the water spray hole along the flow direction of the flue gas is gradually increased;
and the flue gas separation unit is used for separating condensed water in the flue gas subjected to spraying treatment by the spraying unit from the flue gas, so that the separated flue gas and the separated condensed water are respectively sent to the demister and the condensed water collection unit.
As an optimal technical scheme of the flue gas treatment system of the thermal power plant, at least two spraying units are arranged, at least two spraying units are distributed from top to bottom, and the water spraying holes in the spraying pipes of the two adjacent spraying units are distributed in a staggered mode.
As a preferable technical solution of the above flue gas treatment system of a thermal power plant, the spray pipe is annular, square or linear.
As an optimal technical scheme of the flue gas treatment system of the thermal power plant, the system further comprises a water cooling tower, wherein two ends of a heat exchange channel of the water cooling tower are respectively communicated with an outlet of the condensed water collecting unit and an inlet of the spray pump, and the water cooling tower is used for cooling the condensed water collected by the condensed water collecting unit to form cooling water.
As an optimal technical scheme of the flue gas treatment system of the thermal power plant, the cooling water inlet is provided with a speed regulating valve.
As an optimal technical scheme of the flue gas treatment system of the thermal power plant, a flue gas outlet of the flue gas condenser is arranged on the side wall of the shell.
As an optimal technical scheme of the flue gas treatment system of the thermal power plant, a flue gas outlet of the flue gas condenser is communicated with the chimney through a horizontal flue gas pipeline, and the demister is arranged on the horizontal flue gas pipeline.
As a preferred technical solution of the above flue gas treatment system of a thermal power plant, the flue gas separation unit includes a plurality of horizontally arranged separation plates connected end to end, a flue gas channel is formed between two adjacent separation plates, and the flow directions of flue gas in two adjacent flue gas channels are opposite;
or, the flue gas separation unit includes that two at least levels set up and from top to bottom distribute gradually the separator plate, every all be equipped with a plurality of flue gas passageways that the array distributes on the separator plate, adjacent two along the array direction flue gas passageway dislocation distribution on the separator plate.
As a preferable technical solution of the above-mentioned flue gas treatment system of a thermal power plant, the separation plate is made of stainless steel material or plastic.
The utility model has the advantages that: the utility model sprays cooling water from top to bottom through the spraying unit to spray flue gas discharged by the desulfurizing tower, because the temperature of the cooling water is far lower than the temperature of the flue gas discharged by the desulfurizing tower, when the flue gas discharged by the desulfurizing tower enters the shell, the flue gas contacts with the cooling water sprayed by the spraying unit, wet flue gas is formed to reduce the temperature of the flue gas, the wet flue gas is condensed on the flue gas separation unit to form condensed water after passing through the flue gas separation unit, flows downwards along the same trend and finally flows into the condensed water collection unit through the condensed water outlet, so as to achieve the purpose of reducing smoke plume, simultaneously make the soluble matters in the smoke dissolved in water, reduce the content of pollutants in the smoke, the flue gas after flue gas separation is sent to a demister to remove most of water drops carried in the flue gas discharged by a flue gas condenser, so that the humidity of the flue gas is reduced, and the smoke plume elimination effect is improved.
The utility model provides a flue gas condenser has small, the little advantage of area, can reduce use cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flue gas treatment system of a thermal power plant provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of a flue gas separation unit provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of a flue gas separation unit according to another embodiment of the present invention.
In the figure:
1. a desulfurizing tower; 2. a flue gas condenser; 20. a housing; 21. a spraying unit; 22. a flue gas separation unit; 221. a separation plate; 222. a flue gas channel; 3. a horizontal flue gas duct; 4. a demister; 5. a chimney; 6. And a condensed water collection unit.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
As shown in fig. 1, the present embodiment provides a flue gas treatment system of thermal power factory, including being used for carrying out desulfurization treatment's desulfurizing tower 1 to the flue gas that the boiler discharged, flue gas condenser 2 with the exhanst gas outlet intercommunication of desulfurizing tower 1, demister 4 with flue gas outlet intercommunication of flue gas condenser 2, and be used for carrying out the defogging through demister 4 and handle the flue gas and discharge into atmospheric chimney 5.
In the embodiment, the flue gas condenser 2 comprises a vertically arranged shell 20, the upper part of the shell 20 is provided with a cooling water inlet, the bottom of the shell 20 is provided with a condensed water outlet, and the shell 20 is externally provided with a spray pump and a condensed water collecting unit 6 communicated with the condensed water outlet; a spraying unit 21 and a flue gas separation unit 22 which are distributed from top to bottom are arranged in the shell 20, wherein the spraying unit 21 is used for spraying cooling water to condense wet flue gas in the flue gas discharged by the desulfurizing tower 1 to form condensed water, and the flue gas separation unit 22 is used for separating the condensed water from the flue gas in the flue gas which is sprayed and processed by the spraying unit 21, so that the separated flue gas and the condensed water are respectively sent to the demister 4 and the condensed water collection unit 6; meanwhile, the flue gas separation unit 22 also has the function of increasing the heat transfer area to strengthen the heat exchange, thereby further improving the condensation effect.
The cooling water is sprayed from top to bottom through the spraying unit 21 to perform spraying treatment on the flue gas discharged by the desulfurizing tower 1, because the temperature of the cooling water is far lower than the temperature of the flue gas discharged by the desulfurizing tower 1, when the flue gas discharged by the desulfurizing tower 1 enters the shell 20, the cooling water is contacted with the cooling water sprayed by the spraying unit 21, wet flue gas is formed to reduce the temperature of the flue gas, the wet flue gas is condensed on the flue gas separation unit 22 through the flue gas separation unit 22 to form condensed water, flows downwards along the trend and finally flows into the condensed water collection unit 6 through a condensed water outlet, so that the aim of reducing smoke plume is achieved, meanwhile, soluble substances in the flue gas are dissolved in water, the content of pollutants in the flue gas is reduced, and the flue gas after flue gas separation is sent to the demister 4 to remove most of water droplets carried in the flue gas discharged by the flue gas condenser 2, so as to reduce the humidity of the flue, improving the smoke plume eliminating effect.
The flue gas condenser 2 with the structure has the advantages of small volume and small occupied area, and can reduce the use cost.
In this embodiment, the upper portion of the casing 20 is provided with a flue gas inlet communicated with the flue gas outlet of the desulfurizing tower 1, and the flow direction of the flue gas is the same as the flow direction of the cooling water, so that the downstream heat exchange is realized. Of course, other embodiments of the present invention can locate the above-mentioned flue gas inlet in the lower portion of the housing 20, and the flow direction of the flue gas is opposite to the flow direction of the cooling water, so as to realize the counter-flow heat exchange.
In this embodiment, the spraying unit 21 includes a spraying pipe communicated with an outlet of the spraying pump, the spraying pipe is provided with a plurality of water spraying holes, and a distance between a central axis of each water spraying hole and a vertical line passing through the central axis of the water spraying hole increases gradually along a flow direction of the flue gas. The spraying unit 21 with the structure has the advantages of simple structure, low cost and large spraying range, and can ensure that cooling water is fully contacted with flue gas, thereby improving the effect of eliminating smoke plume.
The spraying units 21 are at least two, the spraying units 21 are distributed from top to bottom, and the water spraying holes on the spraying pipes of the two adjacent spraying units 21 are distributed in a staggered manner, so that the spraying amplitude is further increased, and cooling water is fully contacted with flue gas. Preferably, the shower is annular or square or rectilinear.
Above-mentioned thermal power factory flue gas processing system still includes the cooling tower, and the both ends of the heat transfer passageway of cooling tower communicate with the export of comdenstion water collection unit 6 and the import of spray pump respectively for the comdenstion water that collects comdenstion water collection unit 6 is cooled down and is handled formation cooling water. The present cooling tower of thermal power factory is passed through to this embodiment and is cooled down the processing to the comdenstion water, has reduced treatment cost, and the cooling water that forms is handled through the cooling tower cooling moreover can carry out cyclic utilization through the spray pump.
The condensate water treatment unit is arranged between the water cooling tower and the spray pump, and because the condensate water formed after spraying is acidic, neutralization treatment is needed, and alkaline substances such as sodium hydroxide and the like are added into the cooling water formed by the cooling treatment of the water cooling tower to treat so as to adjust the pH value of the cooling water.
In this embodiment, the flue gas outlet of flue gas condenser 2 is located the lateral wall of casing 20, and flue gas outlet and chimney 5 of flue gas condenser 2 pass through horizontal flue gas pipeline 3 intercommunication, and defroster 4 is located on horizontal flue gas pipeline 3.
As shown in fig. 2, in this embodiment, the flue gas separation unit 22 includes at least two separation plates 221 horizontally disposed and sequentially distributed from top to bottom, each separation plate 221 is provided with a plurality of flue gas channels 222 distributed in an array, and the flue gas channels 222 on two adjacent separation plates 221 along the array direction are distributed in a staggered manner. Preferably, the flue gas channel 222 is arranged vertically. Through the arrangement, the time of the smoke passing through the smoke separation unit 22 is prolonged, so that wet smoke in the smoke can be gradually condensed on the inner wall of the separation plate 221 to form condensed water and flows out along the smoke channel 222, the heat transfer area is increased, the heat exchange effect is improved, the high condensation effect is further improved, and the aim of eliminating smoke plume is fulfilled.
In other embodiments of the present invention, the flue gas separation unit 22 with other structures can also be adopted, specifically, as shown in fig. 3, the flue gas channel 222 on each separation plate 221 is obliquely arranged, that is, the central axis of the flue gas channel 222 and the included angle formed by the vertical direction are acute angles. The flue gas separation unit 22 may also be configured as follows, specifically, the flue gas separation unit 22 includes a plurality of horizontally arranged separation plates 221 connected end to end, a flue gas channel 222 is formed between two adjacent separation plates 221, and the flow directions of flue gas in two adjacent flue gas channels 222 are opposite.
In this embodiment, the separation plate 221 is made of stainless steel or plastic, and the separation plate 221 may be fixed to the inner wall of the casing 20. Preferably, the separation plate 221 is made of hydrophilic type plastic to improve coagulation effect.
In this embodiment, the cooling water inlet is equipped with the governing valve, can adjust the cooling water velocity of flow that delivers to in the shower through the governing valve, can prolong cooling water dwell time in casing 20 through reducing cooling water velocity of flow, makes cooling water and flue gas fully contact.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (9)
1. The flue gas treatment system of the thermal power plant is characterized by comprising a desulfurizing tower (1) for desulfurizing flue gas discharged by a boiler, a flue gas condenser (2) communicated with a flue gas outlet of the desulfurizing tower (1), a demister (4) communicated with a flue gas outlet of the flue gas condenser (2), and a chimney (5) for discharging the flue gas subjected to demisting treatment by the demister (4) into the atmosphere;
the flue gas condenser (2) comprises a vertically arranged shell (20), the upper part of the shell (20) is provided with a cooling water inlet, the bottom of the shell (20) is provided with a condensed water outlet, and a spray pump and a condensed water collecting unit (6) communicated with the condensed water outlet are arranged outside the shell (20); be equipped with in casing (20) from top to bottom and distribute:
the spray unit (21) is used for spraying cooling water to condense wet flue gas in the flue gas discharged by the desulfurization tower (1) to form condensed water, the spray unit (21) comprises a spray pipe communicated with an outlet of the spray pump, a plurality of water spray holes are formed in the spray pipe, and the distance between the central axis of each water spray hole and a vertical line passing through the central axis of the water spray hole in the flow direction of the flue gas is gradually increased;
the flue gas separation unit (22), the flue gas separation unit (22) is used for separating the condensed water in the flue gas which is sprayed and processed by the spraying unit (21) from the flue gas, so that the separated flue gas and the separated condensed water are respectively sent to the demister (4) and the condensed water collection unit (6).
2. The flue gas treatment system of a thermal power plant according to claim 1, wherein the spraying units (21) are provided with at least two spraying units, at least two spraying units (21) are distributed from top to bottom, and the water spraying holes on the spraying pipes of two adjacent spraying units (21) are distributed in a staggered manner.
3. The thermal power plant flue gas treatment system of claim 2, wherein the spray pipe is annular, square or linear.
4. The flue gas treatment system of a thermal power plant according to claim 1, further comprising a water cooling tower, wherein two ends of the heat exchange channel of the water cooling tower are respectively communicated with the outlet of the condensed water collection unit (6) and the inlet of the spray pump, and are used for cooling the condensed water collected by the condensed water collection unit (6) to form cooling water.
5. The flue gas treatment system of a thermal power plant of claim 1, wherein the cooling water inlet is provided with a speed regulating valve.
6. The flue gas treatment system of a thermal power plant according to claim 1, wherein the flue gas outlet of the flue gas condenser (2) is provided in a side wall of the housing (20).
7. The flue gas treatment system of a thermal power plant according to claim 1, wherein the flue gas outlet of the flue gas condenser (2) is communicated with the chimney (5) through a horizontal flue gas pipe (3), and the demister (4) is arranged on the horizontal flue gas pipe (3).
8. The flue gas treatment system of a thermal power plant according to any one of claims 1 to 7, wherein the flue gas separation unit (22) comprises a plurality of horizontally arranged separation plates (221) which are connected end to end, a flue gas channel (222) is formed between two adjacent separation plates (221), and the flow directions of flue gas in two adjacent flue gas channels (222) are opposite;
or, flue gas separation unit (22) include at least two levels set up and from top to bottom distribution's separating plate (221), every all be equipped with a plurality of flue gas passageways (222) that the array distributes on separating plate (221), adjacent two along the array direction flue gas passageway (222) dislocation distribution on separating plate (221).
9. The thermal power plant flue gas treatment system of claim 8, wherein the separation plate (221) is made of stainless steel material or plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922011034.1U CN211328769U (en) | 2019-11-20 | 2019-11-20 | Flue gas treatment system of thermal power factory |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922011034.1U CN211328769U (en) | 2019-11-20 | 2019-11-20 | Flue gas treatment system of thermal power factory |
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| CN211328769U true CN211328769U (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051112A (en) * | 2020-09-29 | 2020-12-08 | 西安西热节能技术有限公司 | Sampling device and sampling method for flue gas moisture at outlet of desulfurizing tower |
-
2019
- 2019-11-20 CN CN201922011034.1U patent/CN211328769U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051112A (en) * | 2020-09-29 | 2020-12-08 | 西安西热节能技术有限公司 | Sampling device and sampling method for flue gas moisture at outlet of desulfurizing tower |
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