CN111359395A - Coal-based natural gas flue gas multi-point replacement desulfurization device and application method thereof - Google Patents
Coal-based natural gas flue gas multi-point replacement desulfurization device and application method thereof Download PDFInfo
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- CN111359395A CN111359395A CN202010294168.3A CN202010294168A CN111359395A CN 111359395 A CN111359395 A CN 111359395A CN 202010294168 A CN202010294168 A CN 202010294168A CN 111359395 A CN111359395 A CN 111359395A
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
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- 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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- 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
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2258/0283—Flue gases
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Abstract
The invention discloses a multi-point replacement desulfurization device for coal-made natural gas flue gas and a using method thereof, belonging to the technical field of flue gas desulfurization, wherein a flue gas distribution mechanism is distributed on the wall of a rectangular pipe, so that the flue gas introduced into a desulfurization box is effectively subjected to multi-point distribution treatment, when desulfurization alkaline liquid medicine is sprayed downwards, the liquid medicine can be uniformly and fully contacted with the flue gas after multi-point diffusion, sulfur elements in the flue gas are replaced after full neutralization reaction, multi-point desulfurization operation is realized, the problem of low desulfurization efficiency caused by nonuniform local desulfurization is effectively avoided, in addition, the desulfurized gas is introduced into a circulating cooling pipe, high-temperature vapor in the gas is liquefied when meeting cold, the cooling treatment of the gas is effectively realized, and water drops formed by liquefaction are drained downwards, and the adsorption cotton is used for adsorption drying, so that the water mist is easy to remove, and the effect is good.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization, in particular to a coal-made natural gas flue gas multi-point replacement desulfurization device and a using method thereof.
Background
Coal-based natural gas generally refers to the production of synthetic natural gas from mined raw coal through a gasification process. With the implementation of strategies for sustainable development in China and policies such as strengthening environmental protection, the domestic natural gas consumption market will be expanded continuously. The natural gas resource supply is expanded in multiple ways and channels, and the improvement of the gas source structure becomes an important strategy for optimizing the energy structure in China. The coal-based natural gas is used as a substitute and supplement for liquefied petroleum gas and natural gas, so that a new approach for clean energy production is realized, the deep processing industrial structure of coal is optimized, the characteristics of high energy utilization rate are realized, and the development direction of domestic and foreign coal processing and utilization is met.
Flue gas can be generated in the whole production process of the coal-based natural gas, a large amount of sulfide exists in the flue gas, and as the national emission standard of tail gas pollutants discharged in natural gas production is increasingly strict, pollutants such as sulfur dioxide and nitrogen oxide which may cause acid rain and photochemical smog are effectively controlled.
In the prior art, a wet desulphurization method is mostly adopted, and the technological process of the wet desulphurization is generally as follows: the flue gas is dedusted and then directly introduced into a desulfurization tank filled with alkaline liquid medicine to carry out neutralization reaction, the reacted solution is filtered and then circularly pumped into a desulfurization tower to carry out neutralization reaction, so that the desulfurization effect is achieved, and the low desulfurization efficiency is caused because local desulfurization is not uniform when the flue gas is directly introduced into the alkaline liquid medicine for desulfurization; meanwhile, wet desulphurization needs to improve the liquid-gas ratio to achieve higher removal efficiency, which leads to that water carried in the discharged purified flue gas reaches a saturated state, a demister in a flue gas desulphurization device can only remove a part of entrained water in the flue gas, the temperature of the flue gas discharged by the wet desulphurization is generally about 50 ℃, a large amount of water vapor is remained in the desulfurized gas, and the high-temperature water vapor is discharged into the atmosphere along with the desulphurization gas, thereby intensifying the greenhouse effect.
Therefore, the coal-based natural gas flue gas multi-point replacement desulfurization device and the use method thereof are provided for effectively solving some problems in the prior art.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a coal-based natural gas flue gas multi-point replacement desulfurization device and a using method thereof.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A multi-point replacement desulfurization device for coal-based natural gas flue gas comprises a desulfurization box with a flue gas inlet arranged at the bottom end and a steam removal box with a gas outlet arranged at the top end, wherein the inner end of the flue gas inlet penetrates through the desulfurization box and is fixedly connected with a rectangular pipe, the rectangular pipe is arranged at the middle position of the bottom end of the desulfurization box, flue gas distribution mechanisms communicated with the inside of the rectangular pipe are fixedly connected on the peripheral side walls of the upper end of the rectangular pipe, a liquid inlet pipe is fixedly inserted at the inner top end of the desulfurization box, the bottom end of the liquid inlet pipe penetrates through the desulfurization box and is fixedly connected with a spray pipe matched with the flue gas distribution mechanisms, an induced draft fan is fixedly arranged on the side wall of the desulfurization box close to the top end, an induced draft pipe is fixedly connected at the outer end of the induced draft pipe, a heat storage, the bottom of heat accumulation case is got rid of incasement portion through gas conduction pipe and steam and is linked together, steam gets rid of the case and is close to the upper end and installs the multiunit cooling tube, steam gets rid of the interior bottom end of case and installs the water-cooling case, be connected through circulation water conservancy diversion mechanism between water-cooling case and the multiunit cooling tube, steam gets rid of the case and installs the absorption cotton that corresponds with cooling tube bottom position on the inner wall that is located heat accumulation case one end, the multiunit the cooling tube is to adsorbing cotton lopsidedness downwardly distributed.
Furthermore, the flue gas distribution mechanism comprises a distribution plate fixedly connected on the side wall of the flue gas inlet, the distribution plate is provided with a plurality of groups of distributed washing cavities which are communicated up and down along the horizontal direction, one side of the middle part of the distribution plate is fixedly connected with a gas guide pipe, the inner end of the gas guide pipe is communicated with the inner wall of the flue gas inlet, the side wall of the gas guide pipe close to the distribution plate is provided with a plurality of gas guide ports communicated with the distributed washing cavities, the flue gas is upwards guided out along with the rectangular pipe and is guided into the distributed washing cavities in a multi-point dispersing way through the plurality of gas guide ports on the gas guide pipe, when the flue gas is uniformly dispersed, the spray pipe is used for spraying towards the distributed washing cavities, the uniform contact effect of the desulfurization alkaline liquid medicine sprayed from the spray pipe and the flue gas is effectively improved, provides a certain space for the downward movement of the gas-guiding smoke.
Furthermore, the multi-component cloth plate forms a cross structure, the spray pipe is a cross-shaped pipe matched with the multi-component cloth plate, and a plurality of washing spray heads matched with the positions of the distributed washing cavities are distributed at the bottom end of the cross-shaped pipe.
Further, circulation water conservancy diversion mechanism includes fixed connection in the back flow of multiunit cooling tube bottom, multiunit the bottom and the water-cooling tank of back flow communicate mutually, steam is got rid of and is installed the circulating pump that communicates mutually with the water-cooling tank on the lateral wall of case, the circulating pump is connected with the water storage pipe through the back flow, multiunit the top of cooling tube is run through steam and is got rid of the case and be connected with the water storage pipe to the cooling liquid circulation leading-in the water-cooling tank is organized the cooling tube at most to the realization, realizes that the cooling tube is in under the low temperature state all the time.
Further, adsorb the cotton and be the rectangle structure, it establishes the complex with the back flow and inlays mutually to set up a plurality ofly to be used for on the outer end lateral wall of absorption cotton and establishes the chamber, adsorbs the cotton water droplet that can follow the downward drainage of cooling tube and adsorbs the processing, and the technical personnel in the art can adopt thermal insulation material to make the back flow to effectively avoid the absorption cotton that has drying effect to make back flow upper end temperature rise to some extent and influence the cooling effect of cooling tube.
Further, the heat storage box is located the cladding and has the heat-conducting layer on the inner wall of adsorbing cotton one end, the heat-conducting layer adopts heat conduction silica gel, effectively realizes heat transfer, carries out drying process to adsorbing cotton better.
Furthermore, the steam removal box is close to the bottom end fixedly connected with heat insulating board, and the intercommunication the multiunit back flow of water-cooling box runs through the heat insulating board and respectively with multiunit cooling tube bottom end fixed connection, and the multiunit back flow is located the fixedly connected with fin on the lateral wall of heat insulating board below, and the setting of fin is easily cooled down the coolant liquid that comes from cooling tube department to reach the cold circulation effect.
Further, the gas conduction pipe is located the one end port department that steam got rid of the incasement and installs gas distributor, and gas distributor is located the bottom of multiunit cooling tube, and gas distributor is provided with and does benefit to and improves the gaseous upwards diffusion degree of consistency.
A use method of a coal-based natural gas flue gas multi-point replacement desulfurization device comprises the following specific operation steps:
s1, when the device is used for desulfurizing the good smell flue gas, firstly, a liquid inlet pipe is connected with an external desulfurization alkaline liquid medicine source, a flue gas inlet is communicated with the generated flue gas source, the flue gas is guided into a rectangular pipe of a desulfurization box through the flue gas inlet, as the distribution plates with a plurality of distribution washing cavities are distributed on the peripheral side wall of the rectangular pipe, the flue gas in the rectangular pipe is distributed in the distribution washing cavities of the distribution plates in a multi-point way through a gas guide pipe, at the moment, the liquid inlet pipe is communicated with the desulfurization alkaline liquid medicine, the desulfurization alkaline liquid medicine is sprayed downwards through a plurality of washing nozzles corresponding to the positions of the distribution washing cavities, and the desulfurization alkaline liquid medicine is guided into the distribution washing cavities to be fully contacted with the flue gas, so as to effectively improve the desulfurization effect;
s2, leading the fully desulfurized gas into a heat storage box through a draught fan and an induced draft pipe, wherein the heat storage box is used for storing certain heat by utilizing the high temperature of the gas and conducting the heat to adsorption cotton positioned on the inner side of a steam removal box, leading the flue gas into the upper end part of the steam removal box through the heat storage box and a gas conduction pipe and dispersing the flue gas through a gas distributor, contacting the upwardly diffused gas with a plurality of groups of cooling pipes through which cooling liquid flows, contacting the high-temperature steam in the gas with the pipe walls of the low-temperature cooling pipes, and forming water drops by the steam, thereby effectively removing the steam in the gas and cooling the gas;
s3, water drops formed on the pipe wall of the cooling pipe are drained downwards along with the inclined direction of the cooling pipe, the water drops are guided to the adsorption cotton, the adsorption cotton is adsorbed, the adsorption cotton continuously receives higher temperature from one side of the heat storage box, and therefore the adsorption cotton with water stains is effectively dried, the water drops are effectively and continuously adsorbed, and cooled gas is led out through the exhaust port.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme is through distributing flue gas distribution mechanism on the rectangular pipe wall, thereby effectively carry out the multiple spot distribution to leading-in flue gas to the desulfurization incasement and handle, when spraying desulfurization alkaline liquid medicine downwards, the liquid medicine can be even carry out abundant and even contact with the flue gas after the multiple spot diffusion, replace the sulphur element in the flue gas after abundant neutralization reaction, realize the multiple spot desulfurization operation, effectively avoid leading to the desulfurization inefficiency because of producing local desulfurization is inhomogeneous, in addition, gas after will desulfurizing lets in the circulation has cooling tube department, high temperature steam in the gas meets cold and liquefaction, effectively realize gaseous cooling and handle, and the water droplet that the liquefaction formed is adsorbed by the adsorption cotton and is dried, water smoke gets rid of the simple and easy and effectual of effect.
(2) The smoke distribution mechanism comprises a distribution plate fixedly connected on the side wall of the smoke inlet, the distribution plate is provided with a plurality of groups of distribution washing cavities which are communicated up and down along the horizontal direction, one side of the middle part of the distribution plate is fixedly connected with an air duct, the inner end of the gas-guide tube is communicated with the inner wall of the flue gas inlet, the side wall of the gas-guide tube close to the distribution plate is provided with a plurality of gas-guide ports communicated with the distribution washing cavity, the flue gas is guided out upwards along with the rectangular tube, and the flue gas is guided into a plurality of distributed washing cavities in a multi-point dispersing way through a plurality of gas guide openings on the gas guide pipe, when the flue gas is uniformly diffused, the spraying pipe is used for spraying towards the distributed washing cavity, so that the uniform contact effect of the desulfurization alkaline liquid medicine sprayed from the spraying pipe and the flue gas is effectively improved, thereby improving the flue gas desulfurization efficiency, and the air duct is arranged at the middle part of the distribution plate to provide a certain space for the downward movement of the flue gas of the air duct.
(3) Adsorb cotton and be the rectangle structure, it establishes the complex with the back flow and inlays mutually to have seted up a plurality ofly on the outer end lateral wall of absorption cotton and establishes the chamber, adsorbs cotton can adsorb the processing to the water droplet along with the downward drainage of cooling tube, and the technical staff in the art can adopt thermal insulation material to make the back flow to effectively avoid the absorption cotton that has drying effect to make the back flow upper end temperature rise to some extent and influence the cooling effect of cooling tube.
(4) The heat accumulation case is located the cladding on the inner wall of adsorbing cotton one end and has the heat-conducting layer, the heat-conducting layer adopts heat conduction silica gel, effectively realizes transferring heat, carries out drying process to adsorbing cotton better to effectively realize adsorbing cotton and continuously adsorbing the water droplet.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a first perspective view of the present invention;
FIG. 3 is a perspective view of the junction of the rectangular tube and the flue gas distribution mechanism of the present invention;
FIG. 4 is a perspective view of the junction of the liquid inlet pipe and the shower pipe of the present invention;
FIG. 5 is a perspective view of the junction of the cooling tube and the circulating fluid directing mechanism of the present invention;
fig. 6 is a second perspective view of the present invention.
The reference numbers in the figures illustrate:
1 desulfurization box, 2 flue gas air inlets, 3 rectangular pipes, 4 air ducts, 5 distribution plates, 501 distribution washing cavities, 6 liquid inlet pipes, 7 spray pipes, 701 washing spray heads, 8 induced draft fans, 9 induced draft pipes, 10 heat storage boxes, 11 heat conduction layers, 12 water vapor removal boxes, 13 gas conduction pipes, 14 cooling pipes, 15 return pipes, 16 water storage pipes, 17 circulating pumps, 18 water cooling boxes, 19 adsorption cotton and 20 radiating fins.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-2, a multipoint replacement desulfurization device for coal-based natural gas flue gas, comprising a desulfurization box 1 with a flue gas inlet 2 at the bottom end and a steam removal box 12 with an exhaust port at the top end, wherein the outer side walls of the desulfurization box 1 and the steam removal box 12 are both provided with a rotating door, which is easy to install and clean internal mechanisms, the inner end of the flue gas inlet 2 penetrates through the desulfurization box 1 and is fixedly connected with a rectangular pipe 3, the rectangular pipe 3 is arranged at the middle position of the bottom end of the desulfurization box 1, the peripheral side walls of the upper end of the rectangular pipe 3 are both fixedly connected with flue gas distribution mechanisms communicated with the inside of the rectangular pipe 3, the flue gas distribution mechanisms are used for uniformly distributing and diffusing flue gas guided upwards through the rectangular pipe 3, the inner top end of the desulfurization box 1 is fixedly inserted with a liquid inlet pipe 6, the liquid inlet pipe 6 is communicated with an external desulfurization alkaline liquid medicine source, the bottom end of the liquid inlet pipe, the liquid medicine passes through shower 7 and spouts downwards and carries out abundant contact mixture with the flue gas of flue gas distribution mechanism department to realize that the multiple spot replaces out the sulphide in the flue gas, and desulfurization case 1 is close to bottom department and installs the fluid-discharge tube, and the fluid-discharge tube is used for carrying out subsequent processing outside desulfurization case 1 to the liquid medicine discharge desulfurization after the flue gas washing, does not mark in the figure, does not do too much to describe here.
Referring to fig. 1 and fig. 3, specifically, the flue gas distribution mechanism includes a distribution plate 5 fixedly connected to the side wall of the flue gas inlet 2, the distribution plate 5 is provided with a plurality of sets of vertically through distribution washing cavities 501 along the horizontal direction, one side of the middle portion of the distribution plate 5 is fixedly connected with a gas duct 4, the inner end of the gas duct 4 is communicated with the inner wall of the flue gas inlet 2, the side wall of the gas duct 4 near the distribution plate 5 is provided with a plurality of gas guide ports communicated with the distribution washing cavities 501, the flue gas is guided out upwards along with the rectangular pipe 3 and is guided into the distribution washing cavities 501 through the plurality of gas guide ports on the gas duct 4 in a multi-point dispersion manner, when the flue gas is uniformly diffused, the spray pipe 7 is utilized to spray towards the distribution washing cavities 501, so as to effectively improve the uniform contact effect between the desulfurization alkaline liquid medicine sprayed from, the gas guide pipe 4 is arranged in the middle of the distribution plate 5, so that a certain space is provided for downward movement of gas guide smoke, and the vertical straight length of the distribution washing cavity 501 can be designed according to actual needs, so that a neutralization space which is fully contacted with liquid medicine is effectively provided for the gas guided into the distribution washing cavity 501.
Referring to fig. 3-4, the plurality of distribution plates 5 form a cross structure, the shower pipe 7 is a cross pipe matched with the plurality of distribution plates 5, and a plurality of washing nozzles 701 matched with the positions of the distributed washing cavities 501 are distributed at the bottom end of the cross pipe.
Referring to fig. 1 and 5-6, an induced draft fan 8 is fixedly installed on the side wall of the desulfurization tank 1 near the top end, an induced draft pipe 9 is fixedly connected to the outer end of the induced draft fan 8, a heat storage tank 10 is fixedly connected between the desulfurization tank 1 and the vapor removal tank 12, the bottom end of the induced draft pipe 9 penetrates through the interior of the heat storage tank 10, the bottom end of the heat storage tank 10 is communicated with the interior of the vapor removal tank 12 through a gas conduction pipe 13, multiple groups of cooling pipes 14 are installed near the upper end of the vapor removal tank 12, a water cooling tank 18 is installed at the inner bottom end of the vapor removal tank 12, the water cooling tank 18 is connected with the multiple groups of cooling pipes 14 through a circulating flow guide mechanism, the circulating flow guide mechanism comprises a return pipe 15 fixedly connected to the bottom ends of the multiple groups of cooling pipes 14, the bottom ends of the multiple groups of return pipes 15 are communicated with the water cooling tank 18, the top of multiunit cooling tube 14 runs through steam and gets rid of case 12 and be connected with water storage pipe 16, in the cooling liquid circulation that realizes in the water-cooling tank 18 is leading-in to multiunit cooling tube 14, realize that cooling tube 14 is in under the low temperature state all the time, gas conduction pipe 13 is located steam and gets rid of the one end port department of case 12 and installs gas distributor, and gas distributor is located the bottom of multiunit cooling tube 14, gas distributor's being provided with does benefit to and improves gaseous upwards diffusion degree of consistency, gas that upwards diffuses contacts with the multiunit cooling tube 14 that the circulation has the cooling liquid, high temperature steam in the gas contacts microthermal cooling tube 14 pipe wall, steam forms the water droplet, effectively get rid of the steam in the gas, play the cooling effect to gas, gas after the cooling is derived through the gas vent.
Referring to fig. 1, the inner wall of the water vapor removal tank 12 at one end of the heat storage tank 10 is provided with adsorption cotton 19 corresponding to the bottom end of the cooling pipe 14, a plurality of groups of cooling pipes 14 are distributed obliquely downward toward one side of the adsorption cotton 19, the adsorption cotton 19 is rectangular, the outer side wall of the adsorption cotton 19 is provided with a plurality of embedding cavities for embedding and matching with the return pipe 15, the adsorption cotton 19 can adsorb water drops flowing downward along the cooling pipe 14, the water mist removal is simple and easy, the removal effect is good, and a person skilled in the art can make the return pipe 15 of a heat insulating material, thereby effectively avoiding the adsorption cotton 19 with drying effect from causing the temperature of the upper end of the return pipe 15 to rise to affect the cooling effect of the cooling pipe 14, and heat accumulation case 10 is located to adsorb and has the heat-conducting layer 11 on the inner wall of cotton 19 one end cladding, and heat-conducting layer 11 adopts heat conduction silica gel, effectively realizes heat transfer, carries out drying process to adsorbing cotton 19 better.
In addition, the steam removing box 12 is fixedly connected with a heat insulation board close to the bottom end part, a plurality of groups of return pipes 15 communicated with the water cooling box 18 penetrate through the heat insulation board and are respectively fixedly connected with the bottom ends of a plurality of groups of cooling pipes 14, the plurality of groups of return pipes 15 are fixedly connected with cooling fins 20 on the outer side wall below the heat insulation board, and the cooling fins 20 are arranged to easily cool the cooling liquid from the cooling pipes 14, so that the cold circulation effect is achieved.
A use method of a coal-based natural gas flue gas multi-point replacement desulfurization device comprises the following specific operation steps:
s1, when a person skilled in the art uses the device to desulfurize the good smell flue gas, firstly, a liquid inlet pipe 6 is connected with an external desulfurization alkaline liquid medicine source, a flue gas inlet 2 is communicated with the generated flue gas source, the flue gas is guided into a rectangular pipe 3 of a desulfurization box 1 through the flue gas inlet 2, as a distribution plate 5 with a plurality of distribution washing cavities 501 is distributed on the peripheral side wall of the rectangular pipe 3, the flue gas in the rectangular pipe 3 is distributed in the distribution washing cavities 501 of the distribution plate 5 through a plurality of points of a gas guide pipe 4, at the moment, the liquid inlet pipe 6 is communicated with the desulfurization alkaline liquid medicine, the desulfurization alkaline liquid medicine is sprayed downwards through a plurality of washing spray heads 701 corresponding to the distribution washing cavities 501, and the desulfurization alkaline liquid medicine is guided into the distribution washing cavities 501 to be fully contacted with the flue gas, so as to effectively improve the desulfurization effect;
s2, the fully desulfurized gas is guided into a heat storage box 10 through a draught fan 8 and an induced draft pipe 9, the heat storage box 10 is used for storing certain heat by utilizing the high temperature of the gas and conducting the heat to adsorption cotton 19 positioned on the inner side of a water vapor removal box 12, the flue gas is guided into the upper end part of the water vapor removal box 12 through the heat storage box 10 and a gas conduction pipe 13 and is dispersed through a gas distributor, the upwardly diffused gas is contacted with a plurality of groups of cooling pipes 14 through which cooling liquid flows, the high-temperature water vapor in the gas is contacted with the pipe wall of the low-temperature cooling pipe 14, and the water vapor forms water drops, so that the water vapor in the gas is effectively removed, and the gas is cooled;
s3, water drops formed on the pipe wall of the cooling pipe 14 are drained downwards along with the inclined direction of the cooling pipe 14, the water drops are guided to the adsorption cotton 19 and are adsorbed by the adsorption cotton 19, the adsorption cotton 19 continuously receives higher temperature from one side of the heat storage box 10, and therefore the adsorption cotton 19 with water stains is effectively dried, the water drops are effectively and continuously adsorbed, and the cooled gas is led out through the exhaust port.
The components used in the present invention are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experiments.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (9)
1. The utility model provides a coal system natural gas flue gas multiple spot replacement desulphurization unit, includes that desulfurization case (1) and the steam that the gas vent was seted up on top that the bottom installed flue gas air inlet (2) get rid of case (12), its characterized in that: the inner end of the flue gas inlet (2) penetrates through the desulfurization box (1) and is fixedly connected with a rectangular pipe (3), the rectangular pipe (3) is arranged at the middle position of the bottom end of the desulfurization box (1), flue gas distribution mechanisms communicated with the inside of the rectangular pipe (3) are fixedly connected to the peripheral side wall of the upper end of the rectangular pipe (3), a liquid inlet pipe (6) is fixedly inserted into the inner top end of the desulfurization box (1), the bottom end of the liquid inlet pipe (6) penetrates through the desulfurization box (1) and is fixedly connected with a spray pipe (7) matched with the flue gas distribution mechanisms, an induced draft fan (8) is fixedly installed on the side wall, close to the top end, of the desulfurization box (1), and the outer end of the induced draft pipe (9) is;
fixedly connected with heat storage box (10) between desulfurization case (1) and the steam removal box (12), the bottom of induced duct (9) runs through inside heat storage box (10), the bottom of heat storage box (10) is passed through gas conduction pipe (13) and is got rid of case (12) inside and be linked together with steam, steam is got rid of case (12) and is close to the upper end and installs multiunit cooling tube (14), steam is got rid of the interior bottom end of case (12) and is installed water-cooling box (18), be connected through circulation water conservancy diversion mechanism between water-cooling box (18) and multiunit cooling tube (14), steam is got rid of and is installed on the inner wall that case (12) are located heat storage box (10) one end and adsorbs cotton (19), multiunit the cooling tube (14) is to adsorbing cotton (19) lopsidedness and distributing down.
2. The multi-point replacement desulfurization device for the coal-based natural gas flue gas as claimed in claim 1, characterized in that: flue gas distribution mechanism includes distribution plate (5) of fixed connection on flue gas air inlet (2) lateral wall, distribution plate (5) are followed its horizontal direction and are seted up distribution washing chamber (501) that link up from top to bottom of multiunit, middle part one side fixedly connected with air duct (4) of distribution plate (5), the inner and flue gas air inlet (2) inner wall of air duct (4) are linked together, set up a plurality of air guide ports that are linked together with distribution washing chamber (501) on air duct (4) are close to one side lateral wall of distribution plate (5).
3. The coal-based natural gas flue gas multipoint replacement desulfurization device according to claim 2, characterized in that: multiunit distributing plate (5) constitute the cruciform structure, shower (7) are the cross venturi tube with multiunit distributing plate (5) assorted, the bottom distribution of cross venturi tube has a plurality ofly and distributes washing chamber (501) position assorted washing shower nozzle (701).
4. The multi-point replacement desulfurization device for the coal-based natural gas flue gas as claimed in claim 1, characterized in that: circulation water conservancy diversion mechanism includes return pipe (15) of fixed connection in multiunit cooling tube (14) bottom, multiunit the bottom and the water-cooling tank (18) of return pipe (15) are linked together, install circulating pump (17) that are linked together with water-cooling tank (18) on the lateral wall of case (12) is got rid of to steam, circulating pump (17) are connected with water storage pipe (16) through the return pipe, the multiunit the top of cooling tube (14) is run through steam and is got rid of case (12) and be connected with water storage pipe (16).
5. The multi-point replacement desulfurization device for the coal-based natural gas flue gas as claimed in claim 4, characterized in that: the adsorption cotton (19) is of a rectangular structure, and a plurality of embedding cavities used for being embedded with the return pipe (15) in a matched mode are formed in the side wall of the outer end of the adsorption cotton (19).
6. The multi-point replacement desulfurization device for the coal-based natural gas flue gas as claimed in claim 5, characterized in that: the heat storage box (10) is located the inner wall of absorption cotton (19) one end and coats and has heat-conducting layer (11), heat-conducting layer (11) adopt heat-conducting silica gel.
7. The multi-point replacement desulfurization device for the coal-based natural gas flue gas as claimed in claim 6, characterized in that: the water vapor removing box (12) is fixedly connected with a heat insulation plate close to the bottom end part, a plurality of groups of return pipes (15) communicated with the water cooling box (18) penetrate through the heat insulation plate and are respectively fixedly connected with the bottom ends of a plurality of groups of cooling pipes (14), and the plurality of groups of return pipes (15) are fixedly connected with radiating fins (20) on the outer side wall below the heat insulation plate.
8. The multi-point replacement desulfurization device for the coal-based natural gas flue gas as claimed in claim 1, characterized in that: the gas conduction pipe (13) is arranged at one end port of the steam removing box (12) and is provided with a gas distributor, and the gas distributor is arranged at the bottom end of the plurality of groups of cooling pipes (14).
9. The use method of the coal-based natural gas flue gas multipoint replacement desulfurization device according to any one of claims 1 to 9, comprising the following specific operation steps:
s1, when the device is used for desulfurizing the good smell flue gas, firstly, a liquid inlet pipe (6) is connected with an external desulfurization alkaline liquid medicine source, a flue gas inlet (2) is communicated with the generated flue gas source, the flue gas is guided into a rectangular pipe (3) of a desulfurization box (1) through the flue gas inlet (2), as a distribution plate (5) with a plurality of distribution washing cavities (501) is distributed on the peripheral side wall of the rectangular pipe (3), the flue gas in the rectangular pipe (3) is distributed in the distribution washing cavities (501) of the distribution plate (5) through a plurality of air ducts (4), at the moment, the liquid inlet pipe (6) is communicated with the desulfurization alkaline liquid medicine, the desulfurization alkaline liquid medicine is sprayed downwards through a plurality of washing nozzles (701) corresponding to the positions of the distribution washing cavities (501), the desulfurization alkaline liquid medicine is guided into the distribution washing cavities (501) to be fully contacted with the flue gas, so as to effectively improve the desulfurization effect of the flue gas;
s2, the fully desulfurized gas is guided into a heat storage box (10) through a draught fan (8) and an induced draft pipe (9), the heat storage box (10) is used for storing certain heat by utilizing the high temperature of the gas and conducting the heat to adsorption cotton (19) positioned on the inner side of a vapor removal box (12), the flue gas is guided into the upper end part of the vapor removal box (12) through the heat storage box (10) and a gas conducting pipe (13) and is dispersed through a gas distributor, the upwardly diffused gas is contacted with a plurality of groups of cooling pipes (14) through which cooling liquid flows, the high-temperature vapor in the gas is contacted with the pipe walls of the low-temperature cooling pipes (14), and the vapor forms water drops, so that the vapor in the gas is effectively removed, and the temperature of the gas is reduced;
s3, water drops formed on the pipe wall of the cooling pipe (14) are drained downwards along with the inclined direction of the cooling pipe (14), the water drops are guided to the adsorption cotton (19) and are adsorbed by the adsorption cotton (19), the adsorption cotton (19) continuously receives higher temperature from one side of the heat storage box (10), and therefore the adsorption cotton (19) with water stains is effectively dried, the water drops are effectively and continuously adsorbed, and the cooled gas is led out through an exhaust port.
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| CN202010294168.3A CN111359395A (en) | 2020-04-15 | 2020-04-15 | Coal-based natural gas flue gas multi-point replacement desulfurization device and application method thereof |
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| CN202010294168.3A CN111359395A (en) | 2020-04-15 | 2020-04-15 | Coal-based natural gas flue gas multi-point replacement desulfurization device and application method thereof |
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