CN110935279A - Heat pump type white smoke eliminating device and method thereof - Google Patents
Heat pump type white smoke eliminating device and method thereof Download PDFInfo
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- CN110935279A CN110935279A CN201911318978.1A CN201911318978A CN110935279A CN 110935279 A CN110935279 A CN 110935279A CN 201911318978 A CN201911318978 A CN 201911318978A CN 110935279 A CN110935279 A CN 110935279A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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Abstract
The invention discloses a heat pump type white smoke eliminating device which comprises a white smoke eliminating composite tower, wherein an air heater, a fan, a gas rising pipe, a saturated heat pump type evaporator, a spray header and a dust removing baffle plate are sequentially arranged in a tower body of the white smoke eliminating composite tower from top to bottom; the heat pump type evaporator is connected with the air heater through a pipeline; the cooling cooler is connected with the air heater through a pipeline; the tower bottom of the white smoke eliminating composite tower is connected with a spray header through a dust removing water pump by a pipeline. The device has the advantages of small volume, small investment, small air quantity to be configured, small power consumption, energy conservation and investment reduction. The invention also discloses a heat pump type white smoke eliminating method, which realizes efficient mass and heat transfer by utilizing the plate-fin heat exchange element arranged in the tower, utilizes the medium circulation heat pump technology to carry out heat transfer, condenses the moisture in the hot gas after dust removal, heats the low-temperature gas, effectively treats the high-temperature saturated wet gas into the low-moisture-content gas, and simultaneously can reduce the operation cost.
Description
Technical Field
The invention relates to the technical field of hot waste gas treatment, in particular to a heat pump type white smoke eliminating device and a method thereof.
Background
After partial hot waste gas generated in chemical treatment processes such as a lime calcining kiln carbonization section, a coking section, a rosin modification section, a cooling tower section and the like is subjected to water spraying treatment, the waste gas is humidified due to the contact of the hot waste gas and water, exhaust gas with high moisture content and low temperature is formed, water vapor in the exhaust gas is condensed after being discharged into the atmospheric environment, and the phenomenon of 'white smoke' occurs, soluble salt, sulfuric acid mist and organic matter condensable particles are carried in the 'white smoke', so that the environmental quality is seriously influenced by large amount of discharged water vapor, and the formation of haze is also intensified to a certain degree.
The existing white smoke eliminating technology adopts a tower type series connection mode, hot air flows are contacted with a circulating aqueous medium through a filling section, so that water vapor in the hot air flows is condensed and cooled, hot water formed after the circulating water absorbs heat in the hot air flows is used for heating and diluting supplementary air for waste gas at a rear section, and the purpose of eliminating the white smoke is achieved. However, this process requires a large tower to absorb the heat from the hot gas stream, raise the temperature of the circulating water, then transfer the recovered heat to make-up air by a large fan and heater, and then dilute the exhaust gas with the high temperature make-up dry air. The disadvantages of the method are that the equipment volume is large, the investment is large, the air quantity to be configured is large, the power consumption is also large, and the method is not beneficial to saving energy and reducing the investment.
Disclosure of Invention
The invention aims to provide a heat pump type white smoke eliminating device and a method thereof, aiming at the problems that the existing white smoke eliminating technology has larger volume, larger investment, larger air quantity required to be configured, larger power consumption and is not beneficial to saving energy and reducing investment.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a heat pump type white smoke eliminating device which comprises a white smoke eliminating composite tower, wherein an air heater, a fan, a gas rising pipe, a saturated heat pump type evaporator, a spray header and a dust removing baffle plate are sequentially arranged in a tower body of the white smoke eliminating composite tower from top to bottom; the bottom of the heat pump type evaporator is connected with the bottom of the air heater through a medium cold flow pipe and a medium buffer tank; the top of the cooling cooler is connected with the top of the air heater through a medium hot flow pipe and a heat pump; the tower bottom of the white smoke eliminating composite tower is connected with the spray header through a dust removing water pump through a pipeline; and an air inlet is formed in the side wall of the middle part of the tower body corresponding to the position of the gas lifting pipe.
Further, the air inlet level is lower than the level of the mouth of the draft tube.
Furthermore, a hot air inlet is formed in the side wall of the bottom of the tower body, and an exhaust funnel is arranged at the top of the tower body.
Furthermore, a throttling valve is arranged on the medium cold flow pipe between the cooling cooler and the medium buffer tank.
Furthermore, a condensate pipe is arranged on a pipeline between the dust removal water pump and the spray header.
Further, the heat pump type evaporator and the air heater are plate-fin heat exchange elements.
The second aspect of the invention provides a heat pump type white smoke eliminating method, which comprises the following steps:
s1: hot waste gas enters the white smoke eliminating composite tower from a hot gas inlet, and is dedusted by the dedusting baffle plate and the spray liquid sprayed by the spray header to obtain dedusted hot gas;
s2: the dedusted hot gas rises to a heat pump type evaporator, the medium in the heat pump type evaporator absorbs the heat in the hot gas to be gasified, the gasified medium enters a medium hot flow pipe and is sent to an air heater by a heat pump, meanwhile, the moisture in the hot gas is condensed and cooled to form liquid drops which fall into a dedusting baffle plate, and the hot gas is changed into low-temperature gas with lower moisture content;
s3: the low-temperature gas rises to the air lift pipe and is fully mixed with air entering from the air inlet through the fan, then the air enters the air heater, a medium in the air heater is condensed by the low-temperature gas, the condensed medium enters the medium buffer tank through the medium cold flow pipe, and simultaneously the low-temperature gas is heated and then is discharged to the atmosphere through the exhaust funnel.
Further, the medium is R134 a.
Furthermore, in S2, the moisture in the hot gas is condensed to reduce the temperature, and after the formed liquid drops fall into the dedusting baffle plate, the liquid drops can be circularly sprayed through the dedusting water pump and the spray header.
Further, the hot exhaust gas at the hot gas inlet has a gas velocity of 2-6 m/s.
Compared with the prior art, the invention has the following advantages:
according to the heat pump type white smoke eliminating device, only one tower complex is adopted in the white smoke eliminating composite tower, low-level heat energy recovered by utilizing a heat pump principle is reused for improving the temperature of the dehumidified gas, so that hot waste gas is far away from a saturation line, and the hot waste gas is discharged out of the atmosphere and cannot be excessively cooled, saturated and condensed water mist is formed into white smoke; meanwhile, the wet type circulating dust removal is arranged, so that the reduction of particles discharged into the atmosphere is facilitated; the device has the advantages of small volume, small investment, small air quantity to be configured, small power consumption, energy conservation and investment reduction.
According to the heat pump type white smoke eliminating method, the plate-fin heat exchange elements arranged in the tower are used for realizing efficient mass transfer and heat transfer, the medium circulation heat pump technology is used for heat transfer, moisture in the hot gas after dust removal is condensed, then the low-temperature gas is heated, the high-temperature saturated wet gas is effectively treated into the low-moisture-content gas, and meanwhile, the operation cost can be reduced.
Drawings
FIG. 1 is a schematic diagram of a heat pump type white smoke abatement apparatus of the present invention;
wherein the reference numerals are:
1-a dust removal water pump; 2-a condensate pipe; 3-a throttle valve; 4-medium buffer tank; 5-a heat pump; 6-medium cold flow pipe 7-medium hot flow pipe; 8-an exhaust funnel; 9-an air heater; 10-a fan; 11-a riser; 12-an air inlet; 13-heat pump evaporator; 14-a shower head; 15-dust removal baffle plate; 16-hot gas inlet.
Detailed Description
The present invention will be described in detail and specifically with reference to the following examples to facilitate better understanding of the present invention, but the following examples do not limit the scope of the present invention.
Example 1
The embodiment provides a heat pump type white smoke elimination device, as shown in fig. 1, which comprises a white smoke elimination composite tower, wherein an air heater 9, a fan 10, an air lift pipe 11, a saturated heat pump type evaporator 13, a spray header 14 and a dust removal baffle plate 15 are sequentially arranged in a tower body of the white smoke elimination composite tower from top to bottom; the bottom of the heat pump type evaporator (13) is connected with the bottom of the air heater (9) through a medium cold flow pipe (6) and a medium buffer tank (4); the top of the cooling cooler 13 is connected with the top of the air heater 9 through a medium hot flow pipe 7 and a heat pump 5; the tower bottom of the white smoke eliminating compound tower is connected with the spray header 14 through a dust removal water pump 1 through a pipeline; an air inlet 12 is arranged on the side wall of the middle part of the tower body corresponding to the position of the air lifting pipe 11, and the horizontal height of the air inlet 12 is lower than that of the pipe orifice of the air lifting pipe 11; the bottom side wall of the tower body is provided with a hot air inlet 16, and the top of the tower body is provided with an exhaust funnel 8.
As a preferred embodiment, a throttle valve 3 is arranged on the medium cold flow pipe 6 between the cooling cooler 13 and the medium buffer tank 4; a condensate pipe 2 is also arranged on a pipeline between the dedusting water pump 1 and the spray header 14; the heat pump evaporator 13 and the air heater 9 are shown as plate-fin heat exchange elements.
Example 2
The embodiment provides a heat pump type white smoke elimination method, which comprises the following steps:
s1: hot waste gas enters the white smoke elimination composite tower from a hot gas inlet 16 at the speed of 2-6m/s, and is dedusted by spray liquid sprayed by a dedusting baffle plate 15 and a spray header 14 to obtain dedusted hot gas;
s2: the dedusted hot gas rises to a heat pump evaporator 13, the medium in the heat pump evaporator 13 absorbs the heat in the hot gas to be gasified, the gasified medium enters a medium hot flow pipe 7 and is sent to an air heater 9 by a heat pump 5, meanwhile, the moisture in the hot gas is condensed and cooled to form liquid drops which fall into a dedusting baffle plate 15, the liquid drops can be circularly sprayed by a dedusting water pump 1 and a spray header 14, and the hot gas is changed into low-temperature gas with lower water content;
s3: the low-temperature gas rises to the air rising pipe 11 and is fully mixed with the air entering from the air inlet 12 through the fan 10, then the air enters the air heater 9, the medium in the air heater 9 is condensed by the low-temperature gas, the condensed medium enters the medium buffer tank 4 through the medium cold flow pipe 6, and simultaneously the low-temperature gas is heated and then is exhausted to the atmosphere through the exhaust funnel 8.
As a preferred embodiment, the medium is R134 a.
Application example
The heat pump type white smoke elimination device provided in embodiment 1 and the heat pump type white smoke elimination method provided in embodiment 2 are adopted to perform hot exhaust gas treatment:
the diameter of 1100 tower is adopted, and the gas treatment amount is 10000m3The temperature of the hot waste gas is 70 ℃ before entering the tower, the temperature of the hot waste gas is reduced to 40 ℃ after the hot waste gas is circulated by a heat pump evaporator, the temperature difference reaches 30 ℃, the power of the heat pump evaporator is only 7.5KW, and the power of an air exhaust machine is 3 KW; the low-temperature gas fully mixed with the air is heated by the air heater and is discharged out of the atmosphere, no obvious white smoke appears, the effect is obvious, the power is reduced by 60 percent compared with the power of the traditional hot water circulation, and the operation cost is greatly reduced.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A heat pump type white smoke elimination device comprises a white smoke elimination composite tower, and is characterized in that an air heater (9), a fan (10), a riser (11), a saturated heat pump type evaporator (13), a spray header (14) and a dust removal baffle plate (15) are sequentially arranged in a tower body of the white smoke elimination composite tower from top to bottom; the bottom of the heat pump type evaporator (13) is connected with the bottom of the air heater (9) through a medium cold flow pipe (6) and a medium buffer tank (4); the top of the cooling cooler (13) is connected with the top of the air heater (9) through a medium hot flow pipe (7) and a heat pump (5); the tower bottom of the white smoke eliminating compound tower is connected with the spray header (14) through a dust removing water pump (1) by a pipeline; an air inlet (12) is arranged on the side wall of the middle part of the tower body corresponding to the position of the air lifting pipe (11).
2. A heat pump white smoke elimination apparatus according to claim 1, wherein a level of said air inlet (12) is lower than a level of a nozzle of said gas lift tube (11).
3. A heat pump type white smoke abatement apparatus according to claim 1, wherein a hot gas inlet (16) is provided on a bottom side wall of said tower body, and an exhaust stack (8) is provided at a top of said tower body.
4. A heat pump type white smoke elimination device according to claim 1, wherein a throttle valve (3) is provided on said medium cold flow pipe (6) between said desuperheater cooler (13) and said medium buffer tank (4).
5. A heat pump type white smoke abatement apparatus according to claim 1, wherein a conduit between said de-dusting water pump (1) and said shower head (14) is further provided with a condensate pipe (2).
6. A heat pump white smoke abatement apparatus according to claim 1, wherein said heat pump evaporator (13) and air heater (9) are plate fin heat exchange elements.
7. A heat pump type white smoke elimination method based on the device of any one of claims 1 to 6, characterized by comprising the following steps:
s1: hot waste gas enters the white smoke eliminating composite tower from a hot gas inlet (16) and is dedusted by spraying liquid sprayed by a dedusting baffle plate (15) and a spray header (14) to obtain dedusted hot gas;
s2: the dedusted hot gas rises to a heat pump evaporator (13), the medium in the heat pump evaporator (13) absorbs the heat in the hot gas to be gasified, the gasified medium enters a medium hot flow pipe (7) and is sent to an air heater (9) by a heat pump (5), meanwhile, the moisture in the hot gas is condensed and cooled to form liquid drops which fall into a dedusting baffle plate (15), and the hot gas is changed into low-temperature gas with lower moisture content;
s3: the low-temperature gas rises to the air rising pipe (11) and is fully mixed with air entering from the air inlet (12) through the fan (10), then the air enters the air heater (9), the medium in the air heater (9) is condensed by the low-temperature gas, the condensed medium enters the medium buffer tank (4) through the medium cold flow pipe (6), and simultaneously the low-temperature gas is heated and then is exhausted to the atmosphere through the exhaust funnel (8).
8. A heat pump white smoke abatement method according to claim 7, wherein said medium is R134 a.
9. A heat pump type white smoke elimination method according to claim 7, wherein in S2, moisture in hot gas is condensed to reduce temperature, and after forming liquid drops which fall into the dust removal baffle plate (15), the liquid drops can be circularly sprayed through the dust removal water pump (1) and the spray header (14).
10. A heat pump white smoke abatement method according to claim 7, wherein the hot exhaust gas at the hot gas inlet (16) has a gas velocity of 2-6 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911318978.1A CN110935279A (en) | 2019-12-19 | 2019-12-19 | Heat pump type white smoke eliminating device and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911318978.1A CN110935279A (en) | 2019-12-19 | 2019-12-19 | Heat pump type white smoke eliminating device and method thereof |
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| CN110935279A true CN110935279A (en) | 2020-03-31 |
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| CN201911318978.1A Pending CN110935279A (en) | 2019-12-19 | 2019-12-19 | Heat pump type white smoke eliminating device and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854434A (en) * | 2022-04-29 | 2022-08-05 | 南京工业大学 | Waste gas cooling and white matter eliminating system for wet quenching |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207641242U (en) * | 2017-11-24 | 2018-07-24 | 武汉凯迪电力环保有限公司 | A kind of wet flue gas flue heat exchange eliminating white smoke and condensate water recovery device |
| CN207786269U (en) * | 2017-11-24 | 2018-08-31 | 武汉凯迪电力环保有限公司 | The device of white cigarette is eliminated in a kind of wet flue gas direct heat transfer |
| CN208244446U (en) * | 2018-08-10 | 2018-12-18 | 西安航天源动力工程有限公司 | The system that a kind of flue gas takes off bletilla energy conservation deep removal pollutant |
| CN109224786A (en) * | 2018-11-02 | 2019-01-18 | 昊姆（上海）节能科技有限公司 | Flue gas injection mixes wind and disappears white system and eliminating white smoke method |
| CN208553608U (en) * | 2018-06-13 | 2019-03-01 | 武汉凯迪电力环保有限公司 | A kind of deep temperature reduction condensation eliminating white smoke device |
| US20190070554A1 (en) * | 2017-09-07 | 2019-03-07 | Jiangnan Environmental Protection Group Inc. | Method for controlling aerosol production during absorption in ammonia desulfurization |
| CN109772071A (en) * | 2019-03-21 | 2019-05-21 | 上海电力学院 | White plume based on upper spray upper air spray column eliminates system |
| CN110124465A (en) * | 2019-05-15 | 2019-08-16 | 杭州蕴泽环境科技有限公司 | A kind of low energy consumption wet flue gas receives water and disappears white device and method |
-
2019
- 2019-12-19 CN CN201911318978.1A patent/CN110935279A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190070554A1 (en) * | 2017-09-07 | 2019-03-07 | Jiangnan Environmental Protection Group Inc. | Method for controlling aerosol production during absorption in ammonia desulfurization |
| CN207641242U (en) * | 2017-11-24 | 2018-07-24 | 武汉凯迪电力环保有限公司 | A kind of wet flue gas flue heat exchange eliminating white smoke and condensate water recovery device |
| CN207786269U (en) * | 2017-11-24 | 2018-08-31 | 武汉凯迪电力环保有限公司 | The device of white cigarette is eliminated in a kind of wet flue gas direct heat transfer |
| CN208553608U (en) * | 2018-06-13 | 2019-03-01 | 武汉凯迪电力环保有限公司 | A kind of deep temperature reduction condensation eliminating white smoke device |
| CN208244446U (en) * | 2018-08-10 | 2018-12-18 | 西安航天源动力工程有限公司 | The system that a kind of flue gas takes off bletilla energy conservation deep removal pollutant |
| CN109224786A (en) * | 2018-11-02 | 2019-01-18 | 昊姆（上海）节能科技有限公司 | Flue gas injection mixes wind and disappears white system and eliminating white smoke method |
| CN109772071A (en) * | 2019-03-21 | 2019-05-21 | 上海电力学院 | White plume based on upper spray upper air spray column eliminates system |
| CN110124465A (en) * | 2019-05-15 | 2019-08-16 | 杭州蕴泽环境科技有限公司 | A kind of low energy consumption wet flue gas receives water and disappears white device and method |
Non-Patent Citations (2)
| Title |
|---|
| 伍沅: "《化工过程动态》", 31 May 1998, 北京：化学工业出版社 * |
| 李先洲等: "《暖通空调规范实施手册》", 31 July 1999, 中国建筑工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854434A (en) * | 2022-04-29 | 2022-08-05 | 南京工业大学 | Waste gas cooling and white matter eliminating system for wet quenching |
| CN114854434B (en) * | 2022-04-29 | 2024-01-26 | 南京工业大学 | Waste gas cooling and whitening system for wet quenching |
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