CN112169527A - Two-step cooling self-heating white-removing dehumidifying and harmful particle removing device - Google Patents
Two-step cooling self-heating white-removing dehumidifying and harmful particle removing device Download PDFInfo
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- CN112169527A CN112169527A CN201910590472.XA CN201910590472A CN112169527A CN 112169527 A CN112169527 A CN 112169527A CN 201910590472 A CN201910590472 A CN 201910590472A CN 112169527 A CN112169527 A CN 112169527A
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- 238000001816 cooling Methods 0.000 title claims abstract description 99
- 238000010438 heat treatment Methods 0.000 title claims abstract description 32
- 239000002245 particle Substances 0.000 title claims abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000003546 flue gas Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000000779 smoke Substances 0.000 claims abstract description 19
- 230000002087 whitening effect Effects 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000005260 corrosion Methods 0.000 claims description 14
- 230000007797 corrosion Effects 0.000 claims description 13
- 238000007791 dehumidification Methods 0.000 claims description 5
- 230000008030 elimination Effects 0.000 claims description 5
- 238000003379 elimination reaction Methods 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 2
- 239000003513 alkali Substances 0.000 claims 2
- 229910001220 stainless steel Inorganic materials 0.000 claims 2
- 230000002776 aggregation Effects 0.000 claims 1
- 238000004220 aggregation Methods 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 239000000498 cooling water Substances 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000003570 air Substances 0.000 description 17
- 239000012080 ambient air Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 239000003518 caustics Substances 0.000 description 3
- -1 nitrate ions Chemical class 0.000 description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012821 model calculation Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 201000005630 leukorrhea Diseases 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 206010046901 vaginal discharge Diseases 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of energy conservation and environmental protection, in particular to a device for self-heating, whitening, dehumidifying and removing harmful particles by two-step cooling. It includes: (1) analyzing components of the smoke; (2) selecting equipment materials or coating materials; (3) establishing a whitening parameter group and a two-step cooling self-heating process according to thermodynamic and aerodynamic characteristics; (4) cooling the primary high-temperature flue gas; (5) secondary cooling of secondary flue gas; (6) the cooled flue gas is subjected to self-heating; (7) if a water cooling device is adopted, cooling water is circulated into the cooling tower; if an air cooling device is adopted, the water condensed from the air flows into the standby water tank; (8) circulating water in the cooling tower circulates to a spraying device through a water pump or a waterless pump to carry out two-step cooling on secondary flue gas. The invention has simple and easy process and low use cost, does not need external medium, and can be widely applied to power plants and steel plants for eliminating white and moisture of smoke and removing harmful substances by using the existing conditions.
Description
Technical Field
The invention relates to the technical field of energy conservation and environmental protection, in particular to a device for self-heating, whitening, dehumidifying and removing harmful particles by two-step cooling.
Background
In recent years, the atmospheric control in China has been improved to the national strategic level, and the problem of the greatest environmental pollution of a plurality of domestic cities is that the average concentration and the peak concentration of PM2.5 and PM10 exceed the standard. The key treatment is focused on the industrial field, especially the treatment of the emission of white or colored smoke plume in various industrial fields, and the smoke contains a large amount of harmful particulate matters.
In order to treat air pollution, a large number of desulfurization and denitrification projects, particularly wet desulfurization, are put into the industrial field in recent years, the moisture content of flue gas subjected to wet desulfurization is higher by 13-15%, the temperature of the flue gas is lower by 50-55 ℃, the desulfurized flue gas enters ambient air, the temperature of the flue gas is reduced, water vapor in the flue gas is in a supersaturated state, and partial water vapor is condensed and fogged, so that the phenomenon of rolling white smoke of a chimney occurs. The necessity of "white smoke" control exists, firstly, although the desulfurization and denitrification treatment is carried out, the smoke still contains a small amount of SO2Can cause harm to the environment and production equipment; secondly, cloud and fog formed above the factory are disturbed, and the enterprise image is influenced. At present, many scientific researchers have proposed some prevention measures, including a heating method or a condensation method, but the methods have some defects, including the problems of corrosion of equipment materials, excessive elimination technology or treatment cost and the like.
Based on the reasons, the device for removing the white, moisture and harmful particles by self-heating in two steps is designed.
According to the method of two-step cooling, self-heating, whitening, dehumidifying and removing harmful particles, a matched implementation device is further designed. The flue gas self heat is utilized to carry out first-step cooling on the flue gas and second-step cooling through an external water cooling or air cooling device, the cooled flue gas is reheated to achieve the purposes of white elimination and dehumidification, and meanwhile, most harmful particles are eliminated in the two-step cooling process. The device has good feasibility and economy and is successfully applied to production practice.
Disclosure of Invention
In order to make up for the defects of the existing equipment and devices and technologies, the invention provides a device for removing white, moisture and harmful particles by two-step cooling and self-heating.
The invention is realized by the following technical scheme:
(1) according to the method for self-heating, whitening, dehumidifying and removing harmful particles by two-step cooling, calculating flue gas input and output parameters of related equipment, including the flow rate of flue gas and the temperature of the flue gas;
(2) designing a first-step cooling device: the technical data of the gas-gas heat exchanger comprise the type determination and the shape size of the heat exchanger, the pipe diameter size of a flue gas inlet and a flue gas outlet, and the material design of the heat exchanger;
(3) designing a second-step cooling device: water cooling equipment or air cooling equipment. If the model selection water cooling mode is designed, the spraying mode of the water cooling equipment, the shape selection of the nozzles and the overall dimension of the water cooling equipment, the input and output pipe diameter size of the flue and the material selection of the water cooling equipment are designed according to the output parameters of the first-step cooling equipment. If the design selection mode is an air cooling mode, designing the input flow of a cold air mixing side and the output flow of a hot air side in the air cooling equipment according to the output parameters of the first-step cooling equipment, and further determining the input and output sizes of the pipe diameter of the cold air mixing side;
(4) the designed first-step and second-step cooling equipment can design and install relevant equipment such as a flow control valve and the like through off-line model calculation according to the temperature and humidity change of the external environment, and control the flow of a flue, an air passage and cooling water so as to achieve the effects of eliminating white and dehumidifying and removing harmful particles;
(5) designing a recovery cooling water pool matched with the first-step cooling equipment, wherein the size and the material are selected;
(6) and designing a recovery cooling water pool, a filtering device, a cooling tower, a water pump and the like which are matched with the cooling equipment in the second step.
The invention has the advantages of
The invention designs a device for self-heating, whitening, dehumidifying and removing harmful particles by two-step cooling;
the invention is based on a method of two-step cooling, self-heating, whitening, dehumidifying and removing harmful particles;
the invention can realize the removal of white smoke plume and harmful particles in smoke in the seasonal variation range of the temperature and the humidity of the external environment;
according to the invention, the flue gas after the two-step cooling is heated by utilizing the self flue gas heat energy, so that a curve area for forming the flue gas is avoided, and white smoke plume and harmful particles are effectively removed;
the invention adopts the self flue gas heat energy to save the energy consumption of equipment, and does not generate secondary pollution and energy waste to the external environment.
Drawings
FIG. 1 is a schematic diagram of a two-step cooling, self-heating, whitening, dehumidifying and air-cooling process;
firstly, a heat exchange device; secondly, an air cooling device; ③ particle settling tank
FIG. 2 is a two-step cooling, self-heating, whitening, dehumidifying and water-cooling process diagram;
firstly, a heat exchange device; a water-cooling spraying device; thirdly, cooling the tower; fourthly, a water pump; particle settling tank
FIG. 3 is a second step of water cooling;
air inlet, air outlet, heat exchanger, spray device, equipment water tank, water pump, cooling tower, water pumps a-60 b-55 c-40 d-50
FIG. 4 is a schematic diagram of a wet plume dissipation technique.
Detailed Description
For a detailed description of the features and effects of the present invention, reference is made to the accompanying drawings.
(1) Air cooling type device structure
Fig. 1 is a diagram of a two-step cooling self-heating white-removing dehumidification process with an air cooling mode selected, wherein 1 is a first-step cooling device and a self-heating device, which are called heat exchange devices. Can be according to flow control equipment according to the condition before the device, like valve instrument etc. 2 are air cooling device, 3 are particulate matter sedimentation tank for retrieve 1 and 2 condensation water and harmful particulate matter after the cooling.
The selection of the heat exchange device 1 and the air cooling device 2 mainly relates to: calculating the flow of the pipeline, selecting the size of the pipeline and selecting the material of the device. Because high-temperature flue gas in a factory is mixed with a plurality of corrosive substances, flue gas and condensed water samples are used for chemical analysis on line, and the reasons that the flue gas contains a large amount of sulfate ions, nitrate ions and chloride ions are considered, the devices 1 and 2 select corrosion-resistant stainless steel or titanium alloy or metal materials internally coated with corrosion-resistant layers or high-strength corrosion-resistant high-molecular materials. The heat exchanger 1 is a heat exchanger structure, such as a plate heat exchanger or a shell-and-tube heat exchanger, but not limited thereto. The air cooling device is a tube type, but is not limited thereto.
(2) Water-cooling type device structure
Fig. 2 is a diagram of a two-step cooling, self-heating, whitening and dehumidifying process with water cooling, wherein 1 is a first-step cooling device and a self-heating device, which are called heat exchange devices. Flow control equipment such as valve instruments and the like can be arranged in front of the device according to conditions; 2 is a water cooling device; 3 is a cooling tower; 4 is a circulating water pump; and 5, a particle settling tank is used for recovering the condensed water and the harmful particles after the cooling of the 1 and the cooling of the 2.
The selection of the heat exchange device 1 and the air cooling device 2 mainly relates to: calculating the flow of the pipeline, selecting the size of the pipeline and selecting the material of the device. Because high-temperature flue gas in a factory is mixed with a plurality of corrosive substances, flue gas and condensed water samples are used for chemical analysis on line, and the reasons that the flue gas contains a large amount of sulfate ions, nitrate ions and chloride ions are considered, the devices 1 and 2 select corrosion-resistant stainless steel or titanium alloy or metal materials internally coated with corrosion-resistant layers or high-strength corrosion-resistant high-molecular materials. The heat exchanger 1 is a heat exchanger structure, such as a plate heat exchanger or a shell-and-tube heat exchanger, but not limited thereto. The water cooling device 2 is designed as a shower device, but is not limited thereto.
But is illustrated in only one embodiment. Fig. 3 is an embodiment of a water cooling method. Wherein: firstly, a high-temperature flue gas inlet is formed; secondly, a smoke outlet is formed after whitening and dehumidifying; thirdly, the heat exchanger has the functions of primary cooling and self-heating; fourthly, a spraying device; a heat exchange water tank is used for collecting condensed water and harmful particles in the process; sixthly, the water pump is used; and the cooling tower. The temperature a is the temperature of the high-temperature flue gas at the inlet, the temperature is designed to be about 60 ℃, the temperature is reduced to b ℃ after the third step, the temperature is about 55 ℃, the temperature is reduced to c ℃ after the fourth step, the temperature is about 40 ℃, and the temperature is heated to about 50 ℃ after the third step and is discharged into the ambient air through the second step. The temperature change in the whole implementation process aims to ensure that the temperature of the high-temperature wet flue gas is controlled according to model calculation so as to achieve the aims of white elimination and dehumidification.
(3) Relates to equipment material selection
In order to ensure the stable operation of the equipment, one key point is the selection of the material of the equipment, the conditions that the environment applied by the designed equipment relates to high temperature and is mixed with various corrosive substances and the like are considered, particularly the sulfate ions, the nitrate ions and the chloride ions in wet flue gas are excessive, and the factors of the stability, the corrosion resistance, the working temperature and the like of the material are considered, so that the item selects corrosion-resistant stainless steel or titanium alloy or a metal material internally coated with a corrosion-resistant layer or a high-strength corrosion-resistant polymer material.
(4) Basic principle of eliminating leukorrhea and dampness
From the "white smoke" formation and dissipation mechanism, it can be seen from fig. 4 that there are currently 3 theoretical methods to achieve the dissipation of "white smoke": 1) the flue gas is directly heated. The white smoke is heated from a point a to a point b and then to an ambient air state point c, so that the relative moisture content of the white smoke is reduced and the white smoke cannot enter a saturated state; 2) cooling the flue gas and then heating. The white smoke is cooled from a point a to a point d, then heated to a point e and changed into an ambient air state point c; 3) the flue gas is directly cooled. The "white smoke" is cooled from a to d and then to f, and then to the ambient air state point c.
The parameter design of the equipment disclosed by the patent of the invention is based on the basic principle of white elimination and dehumidification.
Finally, it should be noted that the above-mentioned embodiments illustrate the objects, technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the technical solutions of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. A two-step cooling self-heating white-removing dehumidifying and harmful particle removing device is characterized in that: the method comprises the following steps: (1) the first step is that a cooling device carries cooling and self-heating functional design; (2) high-temperature flue gas from a flue gas pipeline enters a shell pass of a heat exchanger or equivalent equipment to carry out first-step cooling heat exchange with lower-temperature flue gas in a tube pass, and part of condensed water and harmful particulate matters are condensed and flow out; (3) the secondary flue gas after the first-step cooling enters a water-cooling or air-cooling device connected with the secondary flue gas, the secondary flue gas is cooled in a second step, and most of the white wet flue gas and harmful particles are flushed and discharged through water cooling or air cooling; (4) the flue gas after passing through the water cooling or air cooling device enters the heat exchanger in the step (1) again, and exchanges heat with the primary flue gas with high temperature to achieve a self-heating process; (5) the flue gas which is self-heated by the heat exchanger is discharged into the atmosphere through a pipeline, and the complete processes of white elimination, dehumidification and harmful particle removal are completed for one time; (6) and (3) filtering or treating the condensed water containing harmful particles in other modes, and circulating the condensed water to be cooled by a water pump for the next sequential use.
2. The device for self-heating, whitening, dehumidifying and removing harmful particles in two-step cooling according to claim 1, is characterized in that: the device comprises: a gas-gas heat exchanger, a water cooling or air cooling device, an aggregation water tank, a water pump and matched auxiliary equipment.
3. The device for self-heating, whitening, dehumidifying and removing harmful particles in two-step cooling according to claim 1, is characterized in that: the first step cooling device: the gas-gas heat exchanger is used as a first-step cooling device and is used as a final-step self-heating device.
4. The device for self-heating, whitening, dehumidifying and removing harmful particles in two steps according to claim 1 is characterized in that the cooling device in the second step can be a water cooling device such as a spray device or an air cooling device, and different equipment transformation configurations are carried out according to different process requirements.
5. The device for self-heating, whitening, dehumidifying and removing harmful particles in two-step cooling according to claim 1, is characterized in that: the heat exchanger selected in the step 1 is made of stainless steel or other metal materials or high polymer materials, and is resistant to acid and alkali corrosion; the heat exchanger mode can be selected according to actual demand, and main heat exchanger types such as plate type or tubular type are available.
6. The device for self-heating, whitening, dehumidifying and removing harmful particles in two-step cooling according to claim 1, is characterized in that: the cooling device material selected in the step 3 needs to be made of stainless steel or other metal materials or high polymer materials according to smoke components, and is resistant to acid and alkali corrosion.
7. The device for self-heating, whitening, dehumidifying and removing harmful particles in two-step cooling according to claim 1, is characterized in that: and (4) performing anti-corrosion treatment on the devices and auxiliary equipment such as a water pump and a pipeline in the step (6), wherein the process design of the cooling tower needs to be considered if a water cooling mode is selected in the second step of cooling.
8. The device for self-heating, whitening, dehumidifying and harmful particles in two-step cooling according to claim 1, is characterized in that: related control equipment such as valve meters and the like are designed at the front or the rear of the cooling device to adjust the flow of each pipeline,
the control instrument can not be designed according to the actual situation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910590472.XA CN112169527A (en) | 2019-07-02 | 2019-07-02 | Two-step cooling self-heating white-removing dehumidifying and harmful particle removing device |
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| CN201910590472.XA CN112169527A (en) | 2019-07-02 | 2019-07-02 | Two-step cooling self-heating white-removing dehumidifying and harmful particle removing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879939A (en) * | 2021-02-07 | 2021-06-01 | 山东保蓝环保工程有限公司 | Micro-channel low-energy-consumption tail gas whitening device |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879939A (en) * | 2021-02-07 | 2021-06-01 | 山东保蓝环保工程有限公司 | Micro-channel low-energy-consumption tail gas whitening device |
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Effective date of registration: 20211228 Address after: No. 202, gate 1, building a 18, Zhongguancun, Haidian District, Beijing 100089 Applicant after: Li Jing Applicant after: Li Yiheng Address before: 102200 room 509, block a, No.5 Chaoqian Road, Changping District, Beijing Applicant before: BEIJING IVYQUEN ENERGY SAVING TECHNOLOGIES LTD. |
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