CN212133402U - Flue gas treatment device - Google Patents
Flue gas treatment device Download PDFInfo
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- CN212133402U CN212133402U CN201921028982.XU CN201921028982U CN212133402U CN 212133402 U CN212133402 U CN 212133402U CN 201921028982 U CN201921028982 U CN 201921028982U CN 212133402 U CN212133402 U CN 212133402U
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Abstract
The utility model relates to a flue gas treatment device, which comprises an absorber and a concentration generator; the inside of absorber is formed with the thick liquid pond, sets up the dilute solution export and the concentrated solution entry in intercommunication thick liquid pond on the absorber, and the one end of concentrated generator communicates in the dilute solution export, and the other end of concentrated generator communicates in the concentrated solution entry, and concentrated generator can concentrate the solution that flows from the dilute solution export to flow back the solution in the thick liquid pond through the concentrated solution entry. This flue gas processing apparatus can take off white can carry out recycle to the waste heat again to the cigarette feather, and because the thick liquid pond is discharged into to the dilute solution in the thick liquid pond after the concentration, moisture and heat homoenergetic in this part hot steam can obtain make full use of, in addition, solution concentration in the thick liquid pond constantly obtains the concentration, because concentration improves to the solution of pumping into the spray thrower, the solution that can reduce the spray thrower sprays the volume and reduces the required water yield of this part solution heat transfer, consequently, higher heat and moisture recycle rate have.
Description
Technical Field
The utility model relates to a white equipment technical field is taken off to power plant's flue gas, especially relates to a flue gas processing apparatus.
Background
In the industries of steel, electric power, chemical industry, food and the like, the smoke and SO are discharged2And nitrogen oxides and other pollutants need to be treated by desulfurization beforeThe traditional desulfurization process adopts limestone-gypsum wet desulfurization, the desulfurized high-humidity flue gas contains a large amount of moisture, soluble salts, gypsum particles and the like, the substances enter the atmosphere in the form of aerosol, the wet flue gas can be condensed or condensed when contacting with ambient air with lower temperature, and a large amount of condensed water drops formed in the flue gas refract and scatter light, so that smoke plume or haze appears, and the visibility of the surrounding environment and the physical and psychological health of residents are seriously influenced. In addition, the flue gas after wet flue gas desulfurization is saturated or supersaturated state, and the vapor in the flue gas can carry a large amount of latent heats of vaporization, causes the waste of certain degree to heat energy and water resource, how heat energy and water resource in the make full use of flue gas to improve its recycle ratio, become the technical problem that needs to solve urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a recycle rate's flue gas processing apparatus of heat energy and water resource in the flue gas can further be improved is provided to above-mentioned prior art current situation.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: provided is a flue gas treatment device comprising: the device comprises an absorber and a concentration generator connected with the absorber; the inside of absorber is formed with the thick liquid pond, seted up on the absorber and communicate respectively the dilute solution export and the concentrated solution entry in thick liquid pond, the one end of concentrated generator communicate in the dilute solution export, the other end of concentrated generator communicate in the concentrated solution entry, concentrated generator can concentrate from the solution that the dilute solution export flows out, and through the concentrated solution entry with solution flow back in the thick liquid pond.
In one embodiment, the flue gas treatment device further comprises a first heat exchanger, which is connected between the slurry tank and the concentration generator and is used for preheating the dilute solution flowing into the concentration generator and recovering heat of the concentrated solution flowing out of the concentration generator.
In one embodiment, the flue gas treatment device further comprises a waste heat recovery mechanism, a liquid medium device and a deaerator, wherein the liquid medium device and the deaerator are respectively connected to two ends of the waste heat recovery mechanism, the waste heat recovery mechanism is connected to the absorber and is used for carrying out heat and mass exchange on liquid flowing out of the liquid medium device and enabling the liquid after the heat and mass exchange to flow into the deaerator.
In one embodiment, the waste heat recovery mechanism comprises a second heat exchanger, a spraying solution outlet is further arranged in the absorber, and the spraying solution outlet is communicated with the slurry tank; the absorber is also internally provided with a sprayer which is positioned below the flue gas outlet and used for cooling and absorbing moisture of the flue gas from the flue gas inlet, the spraying solution outlet is communicated with the inlet of the second heat exchanger, and the outlet of the second heat exchanger is connected to the sprayer.
In one embodiment, the waste heat recovery mechanism further comprises a third heat exchanger connected with the second heat exchanger, an inlet of the second heat exchanger is communicated with the liquid medium device, an outlet of the second heat exchanger is connected with an inlet of the third heat exchanger, and an outlet of the third heat exchanger is connected to the deaerator.
In one embodiment, the flue gas treatment device further comprises a heating steam device, the inlet of the concentration generator is communicated with the heating steam device, and the outlet of the concentration generator is connected to an external drain tank.
In one embodiment, the absorber is further provided with a reheater, the reheater is positioned below the flue gas outlet, the inlet of the reheater is communicated with the heating steam device, and the outlet of the reheater is connected to an external drain tank.
In one embodiment, the concentration generator further has a steam outlet connected to the inlet of the third heat exchanger, and the outlet of the third heat exchanger is connected to the external desulfurization circulating water pool.
In one embodiment, the solution is one or any combination of a lithium bromide solution, a lithium chloride solution, a calcium chloride solution and a sodium chloride solution.
In one embodiment, the liquid medium device is used to provide desalinated water.
In one embodiment, the absorber is further provided with a demister, and the demister is arranged below the flue gas outlet.
In one embodiment, the absorber is further provided with a flow equalizing plate, and the flow equalizing plate is arranged above the flue gas inlet.
Compared with the prior art, the beneficial effects of the utility model reside in that:
this flue gas processing apparatus can take off white can carry out recycle to the waste heat of flue gas again to the cigarette feather to because the thick liquid pond is discharged into again to the dilute solution in the thick liquid pond after the concentration, moisture and heat homoenergetic in this part hot steam can obtain make full use of, in addition, the solution concentration in the thick liquid pond constantly obtains the concentration, because the concentration improves to the solution of pumping spray thrower, can reduce the solution spray volume of spray thrower relatively and reduce the required water yield of this part solution heat transfer. Therefore, the flue gas treatment device has higher heat and moisture recovery rate and lower cost.
Drawings
Fig. 1 is a schematic structural diagram of a flue gas treatment device according to an embodiment of the present invention.
Reference numerals:
flue gas treatment device-100, absorber-110, flue gas inlet-1111, flue gas outlet-1112, slurry pool-112, dilute solution outlet-1131, concentrated solution inlet-1132, reheater-114, spraying solution outlet-115, sprayer-116, demister-117, flow equalizing plate-118, first heat exchanger-120, concentration generator-130, heating steam device-140, second heat exchanger-150, liquid medium device-160, third heat exchanger-170, deaerator-180, dilute solution pipeline-210, concentrated solution pipeline-220, first steam pipeline-230, first condensed water pipeline-240, second steam pipeline-250, second condensed water pipeline-260, solution spraying pipeline-270, third steam pipeline-280, concentrated solution tank-220, concentrated solution tank-130, concentrated solution tank-140, concentrated solution tank-240, concentrated solution tank-100, concentrated solution tank-150, concentrated solution tank-180, concentrated solution tank-280, concentrated, An external drain tank-300 and an external desulfurization circulating water pool-400.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a schematic structural diagram of a flue gas treatment device 100 according to an embodiment is shown.
The flue gas treatment device 100 comprises an absorber 110, a first heat exchanger 120, a second heat exchanger 150, a third heat exchanger 170 and a concentration generator 130. The first heat exchanger 120 is used for preheating, and the second heat exchanger 150 and the third heat exchanger 170 belong to a waste heat recovery mechanism.
Further, the flue gas treatment device 100 further comprises a heating steam device 140, a liquid medium device 160 and a deaerator 180.
Further, the flue gas treatment device further includes a dilute solution pipeline 210, a concentrated solution pipeline 220, a first steam pipeline 230, a first condensed water pipeline 240, a second steam pipeline 250, a second condensed water pipeline 260, a solution spraying pipeline 270, and a third steam pipeline 280.
A slurry pool 112 is formed at the lower part of the absorber 110, a flue gas channel is arranged above the slurry pool 112, the flue gas reacts with the spraying solution in a countercurrent way in the rising process, the solution in the slurry pool 112 is sent into the sprayer 116 by a circulating pump and is sprayed with the flue gas in a countercurrent way, the solution completely reacts with the sulfur dioxide in the flue gas, and the reacted solution falls into the slurry pool 112.
Specifically, the high humidity exhaust gas enters from the flue gas inlet 1111 at the bottom of the absorber 110, passes through the flow equalizing plate 118, the sprayer 116, the demister 117 and the reheater 114 provided in the absorber 110 in order, and is then discharged from the flue gas outlet 1112.
The flow equalizing plate 118 is disposed above the flue gas inlet 1111, so that the exhaust gas is easy to generate a vortex flow in the process of entering the flue gas inlet 1111, and the arrangement of the flow equalizing plate 118 can make the flowing direction of the exhaust gas more uniform. The sprayer 116 sprays the concentrated solution with hygroscopicity downwards, and performs heat and mass exchange with the high-humidity waste gas, the temperature and the humidity of the waste gas are reduced, and the concentrated solution correspondingly absorbs the moisture in the high-humidity waste gas and the dilute solution with high temperature, and flows into the slurry tank 112 for recycling. The sprayer 116 may include one or more spray layers, and the solution is sprayed along the flowing direction of the waste gas, reacts with the high-temperature flue gas to reduce the temperature of the flue gas, and is mixed with the flue gas downstream, and the desulfurizer reacts with part of sulfur dioxide in the flue gas.
The waste gas further passes through demister 117 defogging, and this demister 117 is located the top that sprays the layer, can be flat, baffling board formula and collecting pipe formula defroster, also can be forms such as wet-type electrostatic precipitator or several kinds of defroster combinations. Then, the exhaust gas after temperature reduction and dehumidification is discharged through the flue gas outlet 1112 after temperature rise and whitening by the reheater 114.
In one embodiment, the solution in the dilute solution and the concentrated solution refers to one or any combination of a lithium bromide solution, a lithium chloride solution, a calcium chloride solution and a sodium chloride solution with strong hygroscopicity. Preferably, the solution is a calcium chloride solution.
Further, the slurry tank 112 is communicated with the dilute solution outlet 1131 and is communicated with the inlet of the first heat exchanger 120 through the dilute solution pipeline 210, the outlet of the first heat exchanger 120 is communicated with the inlet of the concentration generator 130, the outlet of the concentration generator 130 is connected to the inlet of the first heat exchanger 120, the outlet of the first heat exchanger 120 is connected to the concentrated solution inlet 1132 through the concentrated solution pipeline 220, and the concentrated solution inlet 1132 is disposed above the slurry tank 112 and is used for discharging the concentrated solution to the slurry tank 112. The first heat exchanger 120 is used for preheating the dilute solution, the preheated dilute solution enters the concentration generator 130 to be heated and concentrated to become a concentrated solution, and the concentrated solution is cooled by the first heat exchanger 120 and is discharged to the slurry tank 112 through the concentrated solution pipeline 220, so that the concentration of the dilute solution in the slurry tank 112 is continuously increased.
Further, the heating steam device 140 is used to heat and drive the concentration generator 130, an inlet of the concentration generator 130 is connected to the heating steam device 140 through a first steam line 230, and an outlet of the concentration generator 130 is connected to the external steam trap 300 through a first condensed water line 240.
Specifically, a heating assembly is disposed inside the concentration generator 130, and both ends of the heating assembly jointly protrude to the outside of the concentration generator 130. The driving heat source of the concentration generator 130 is typically electricity or driving steam, which is used in the preferred embodiment. The external steam trap 300 is generally used to store recycled condensate, which is demineralized water that is then added to the boiler.
Further, the steam generated during the concentration of the dilute solution in the concentration generator 130 enters the third heat exchanger 170 for heat recovery. Specifically, the concentration generator 130 has a steam outlet connected to the inlet of the third heat exchanger 170 through a third steam line 280, and the outlet of the third heat exchanger 170 is connected to the external desulfurization circulating water tank 400.
The inlet of the reheater 114 is connected to the steam heating device 140 through a second steam line 250, and the outlet of the reheater 114 is connected to the external drain tank 300 through a second condensed water line 260. Likewise, the reheater 114 uses driving steam as a heat source.
Further, the spraying solution outlet 115 is communicated with the slurry tank 112 and is communicated with the inlet of the second heat exchanger 150 through a solution spraying pipeline 270, and the outlet of the second heat exchanger 150 is connected to the sprayer 116. Since the concentration of the solution in the slurry tank 112 is constantly concentrated, it can be directed from the slurry tank 112 through the solution spray line 270 to the sprayer 116.
Further, the liquid medium device 160 is used to provide a desalted water (desalted water) containing little or no minerals, and the product water is obtained after removing impurities in water such as suspended matters, colloids, and inorganic cations and anions by various water treatment processes. The demineralized water in the liquid medium device 160 passes through the second heat exchanger 150 and the third heat exchanger 170 in sequence to absorb heat and enter the deaerator 180 for further utilization.
The deaerator 180 is one of key devices of a boiler and a heating system, if the deaerator has poor deaerating capacity, serious loss caused by corrosion of a boiler water supply pipeline, an economizer and other accessory devices can be caused, the deaerator deaerates according to a thermal deaerating principle, when water supply is heated at a constant pressure, along with the process of water evaporation, the steam quantity on the water surface is continuously increased, the partial pressure of steam is gradually increased, gas is timely discharged, and accordingly the partial pressure of various gases on the water surface is continuously reduced. When the water is heated to the saturation temperature under the pressure of the deaerator, a large amount of water is evaporated, the partial pressure of water vapor approaches the full pressure on the water surface, the partial pressure of various gases on the water surface approaches zero along with the continuous discharge of the gases, and the gases dissolved in the water escape from the water and are removed.
Specifically, the inlet of the second heat exchanger 150 is communicated with the liquid medium device 160, the outlet of the second heat exchanger 150 is connected with the inlet of the third heat exchanger 170, and the outlet of the third heat exchanger 170 is connected to the deaerator 180.
Compared with the prior art, the beneficial effects of the utility model reside in that:
this flue gas processing apparatus can take off white can carry out recycle to the waste heat of flue gas again to the plume to because the dilute solution in the thick liquid pond discharges into the thick liquid pond again after preheating and concentration, moisture and heat homoenergetic in this part hot steam obtain make full use of, in addition, the solution concentration in the thick liquid pond constantly obtains the concentration, because the concentration improves to the solution of pumping into the spray thrower, can reduce the solution of spray thrower relatively and spray the volume and reduce the required water yield of this part solution heat transfer. Therefore, the flue gas treatment device has higher heat and moisture recovery rate and lower cost.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. A flue gas treatment plant (100) comprising an absorber (110) and a concentration generator (130) connected to the absorber (110), a slurry pool (112) is formed inside the absorber (110), a dilute solution outlet (1131) and a concentrated solution inlet (1132) which are respectively communicated with the slurry pool (112) are arranged on the absorber (110), one end of the concentration generator (130) is communicated with the dilute solution outlet (1131), the other end of the concentration generator (130) is communicated with the concentrated solution inlet (1132), the concentration generator (130) is capable of concentrating the solution flowing out of the dilute solution outlet (1131), and flowing the solution back into the slurry tank (112) through the concentrated solution inlet (1132), the absorber (110) comprises a bottom flue gas inlet (1111) and a top flue gas outlet (1112).
2. The flue gas treatment device (100) according to claim 1, wherein the flue gas treatment device (100) further comprises a first heat exchanger (120), the first heat exchanger (120) being connected between the slurry tank (112) and the concentration generator (130) and being configured to preheat the dilute solution flowing into the concentration generator (130) and to recover heat from the concentrated solution flowing out of the concentration generator (130).
3. The flue gas treatment device (100) according to claim 1 or 2, wherein the flue gas treatment device (100) further comprises a waste heat recovery mechanism, a liquid medium device (160) and a deaerator (180), the liquid medium device (160) and the deaerator (180) are respectively connected to two ends of the waste heat recovery mechanism, and the waste heat recovery mechanism is connected to the absorber (110) and is configured to perform heat and mass exchange on the liquid flowing out from the liquid medium device (160) and flow the liquid after heat and mass exchange into the deaerator (180).
4. The flue gas treatment device (100) according to claim 3, wherein the waste heat recovery mechanism comprises a second heat exchanger (150), a spraying solution outlet (115) is further provided in the absorber (110), and the spraying solution outlet (115) is communicated with the slurry tank (112); a sprayer (116) is further arranged in the absorber (110), the sprayer (116) is located below the flue gas outlet (1112) and is used for cooling and absorbing moisture of the flue gas from the flue gas inlet (1111), the spraying solution outlet (115) is communicated with the inlet of the second heat exchanger (150), and the outlet of the second heat exchanger (150) is connected to the sprayer (116).
5. The flue gas treatment device (100) according to claim 4, wherein the waste heat recovery mechanism further comprises a third heat exchanger (170) connected to the second heat exchanger (150), wherein an inlet of the second heat exchanger (150) is communicated with the liquid medium device (160), an outlet of the second heat exchanger (150) is connected to an inlet of the third heat exchanger (170), and an outlet of the third heat exchanger (170) is connected to the deaerator (180).
6. The flue gas treatment device (100) according to claim 1, wherein the flue gas treatment device (100) further comprises a heating steam device (140), wherein the inlet of the concentration generator (130) is in communication with the heating steam device (140), and the outlet of the concentration generator (130) is connected to an external steam trap (300).
7. The flue gas treatment device (100) according to claim 6, wherein the absorber (110) is further provided with a reheater (114), the reheater (114) being located below the flue gas outlet (1112), an inlet of the reheater (114) being in communication with the heating steam device (140), an outlet of the reheater (114) being connected to an external steam trap (300).
8. The flue gas treatment device (100) according to claim 5, wherein the concentration generator (130) further has a steam outlet connected to the inlet of the third heat exchanger (170), the outlet of the third heat exchanger (170) being connected to an external desulfurization circulating water tank (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921028982.XU CN212133402U (en) | 2019-07-02 | 2019-07-02 | Flue gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921028982.XU CN212133402U (en) | 2019-07-02 | 2019-07-02 | Flue gas treatment device |
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| CN212133402U true CN212133402U (en) | 2020-12-11 |
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| CN201921028982.XU Active CN212133402U (en) | 2019-07-02 | 2019-07-02 | Flue gas treatment device |
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- 2019-07-02 CN CN201921028982.XU patent/CN212133402U/en active Active
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