CN110935276A - Papermaking drying tail gas cyclic utilization device - Google Patents
Papermaking drying tail gas cyclic utilization device Download PDFInfo
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- CN110935276A CN110935276A CN201911299148.9A CN201911299148A CN110935276A CN 110935276 A CN110935276 A CN 110935276A CN 201911299148 A CN201911299148 A CN 201911299148A CN 110935276 A CN110935276 A CN 110935276A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
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- 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
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Abstract
The invention discloses a papermaking drying tail gas recycling device, which comprises a spraying box, a water tank, a heat exchange box and a filter box, wherein the spraying box is arranged on the top of the water tank; the inner chamber that sprays the case is cut apart into first cavity and second cavity through the baffle, be equipped with the air vent on the baffle, the upper right end that sprays the case is equipped with the heat transfer case, the heat transfer case pass through the breather pipe with spray the upper right portion of case and connect, the other end with breather pipe on the heat transfer roof wall is connected, the rose box pass through the breather pipe with the heat transfer case is connected, heat transfer case lower part is equipped with the water tank, the heat transfer case pass through the wet return with the water tank top is connected. The invention has simple structure, the heat exchange box recycles the tail gas after the papermaking drying, and the invention is environment-friendly, energy-saving and production cost-saving. Through pressurization of the draught fan, two-stage spray atomization ionization and the blocking effect of the breathable film, tail gas particles are efficiently removed, and the removal rate can reach more than 95%.
Description
Technical Field
The invention relates to the technical field of papermaking processing, in particular to a papermaking drying tail gas recycling device.
Background
In the process of papermaking, the drying function is mainly to remove water in the pressed paper, improve the strength of the paper and increase the smoothness of the paper, in the drying process of the paper, the dryness of the paper generally needs to be controlled within a certain range, the residual water needs to be evaporated and removed in a drying part of a paper machine and is usually supplied in a steam form, the energy consumption of the existing device in the papermaking drying process is overlarge, the production cost is higher, and in the steam drying process of the existing device, the generated tail gas is not correspondingly treated, so that the environment is greatly damaged.
Disclosure of Invention
The invention aims to solve the technical problem of providing a papermaking drying tail gas recycling device aiming at the defects in the prior art. The papermaking drying tail gas recycling device has the advantages that tail gas particles are efficiently removed through pressurization of the draught fan and the blocking effect of the second-stage spray atomization ionization and the breathable film, and the removal rate can reach more than 95%.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a papermaking drying tail gas recycling device comprises a spraying box, a water tank, a heat exchange box and a filter box; two side walls of the spraying box are respectively provided with an air inlet and an air outlet, and tail gas with 2.5-3 times of atmospheric pressure is introduced into the air inlet; the inner cavity of the spraying box is divided into a first cavity and a second cavity by a partition plate, and at least one power-on nozzle is arranged in each of the first cavity and the second cavity; the bottom plate of the spraying box is provided with a grounding end; the voltage between the nozzle and the bottom plate is 6 KV-15 KV; the partition board is provided with a vent hole, and a breathable waterproof film is arranged in the vent hole; a heat exchange box is arranged at the upper right end of the spraying box and is connected with the upper right part of the spraying box through a vent pipe, and a breathable waterproof film is arranged in the vent pipe between the second cavity and the heat exchange box; the right side of the heat exchange box is provided with a filter box, the filter box is connected with the heat exchange box through a vent pipe, and the filtered tail gas is discharged and then recycled.
Papermaking drying tail gas cyclic utilization device sprays the separation effect of atomizing ionization and ventilated membrane through the pressurization of draught fan and second grade for the tail gas granule is high-efficient to be clear away, the tail gas that has impurity or dust gets into after through the pressurization and sprays the case, spray through twice atomizing, electrified liquid drop adsorption of impurities ability promotes greatly, the atomizing form of reunion makes to remove dust and reaches better efficiency, the separation effect of ventilated membrane makes impurity keep apart through physics nature in addition, the clearance rate is up to 95%, 97% even.
Further, the inside of heat transfer case is provided with multiunit spiral heat exchange tube, the one end of spiral heat exchange tube with breather pipe connection on the left side wall of heat transfer case, the other end with breather pipe connection on the heat transfer roof wall, heat transfer case lower part is equipped with the water tank, the heat transfer case pass through the wet return with the water tank top is connected. The water tank pass through the delivery pipe with spray the top of the nozzle in the incasement and heat transfer case and be connected, the water tank pass through return the liquid pipe with the bottom liquid outlet that sprays the case is connected, detachably is connected with the drainage case between return liquid pipe and water tank (2), the drainage case is provided with the drainage equipment.
The water tank can provide the spraying water source that sprays the case on the one hand, and on the other hand can provide the coolant of heat transfer case, and the return water through spraying the bottom of the case can also recycle after the water strainer filters, and the water strainer is changed according to filtering strength in real time, saves the resource to the utmost, cyclic utilization.
Furthermore, a filter screen is arranged in the vent hole of the partition board, and the filter screen is wrapped with a breathable film; the filter screen is the metal filter screen, and the diameter is 1mm, the ventilated membrane is PE polymer ventilated membrane.
The tail gas passes through the filter screen, coarse dust is filtered, and then the tail gas passes through the breathable film, however, the water particles of the PE high-molecular breathable film are very fine in a water vapor state, and the PE high-molecular breathable film can smoothly permeate into the capillary to the other side according to the capillary movement principle, so that the vapor permeation phenomenon is generated. After the steam condensation becomes the drop, the granule grow, because the effect of drop surface tension, the hydrone just can not break away from the drop smoothly and permeate the opposite side, has prevented also that the infiltration of water from taking place, makes the ventilated membrane have waterproof function, and the water droplet is by the separation, plays waterproof effect. Besides, the filter screen can keep the fixation of the breathable film except for coarse grain cleaning.
Further, first cavity top align to grid has first nozzle, is located from up align to grid has first nozzle on the adjacent first cavity left and right sides wall of baffle from down, first nozzle on the both sides wall with the lateral wall becomes 45 degrees angles, second cavity top align to grid has the second nozzle, is located from up align to grid has the second nozzle on the adjacent second cavity left and right sides wall of baffle from down, the second nozzle on the both sides wall with the lateral wall becomes 135 degrees angles.
When tail gas enters the first cavity through the fan, the temperature of the tail gas is very high, the tail gas can rise rapidly, the first nozzle is installed at the top of the first cavity and sprays water vertically downwards, the first nozzles which are uniformly arranged on the left side wall and the right side wall of the first cavity adjacent to the partition plate from bottom to top form an angle of 45 degrees with the top wall, and the arrangement enables the nozzles to spray water, water flow freely falls and moves far, the water flow speed is higher downwards, the water sprayed out by the nozzles downwards can be overlapped with each other, the water flow density is higher, the tail gas can be fully showered at the bottom of the first cavity, large particles in the tail gas are fully contacted with the water, the large particles are adhered to the water and stay at the bottom of the first cavity, and the temperature of the tail gas can further fall; most residual tail gas can pass the filter screen entering second cavity on the baffle, the tail gas that gets into the second cavity is located the well upper portion of second cavity, the nozzle of the roof of second cavity is vertical spouts down, from up align to grid down on the adjacent second cavity left and right sides wall of two baffles has the second nozzle, from up spouting down, rivers will superpose at the well upper portion of second cavity like this, carry out abundant shower to tail gas, make most small particulate matter and water bonding, will make most small particle filtering in the tail gas.
Further, the spiral heat exchange tubes are bent to extend into the heat exchange box and vertically extend upwards from the bottom to the top of the heat exchange box; the spiral heat exchange tubes are connected through threads.
Cold water is put into the heat exchange box, the temperature of the cold water is between 0 and 4, the spiral heat exchange tube bends to stretch into the heat exchange box, the spiral heat exchange tube is soaked in the cold water, the temperature of the tail gas in the heat exchange tube is reduced, the temperature of the cold water is increased, and the temperature of the tail gas penetrating through the heat exchange box is reduced to below 50 ℃.
Further, the rose box includes alkaline filtration filter screen, acid filter screen, drying screen, first exhaust port and second gas vent, first exhaust port is located rose box lateral wall bottom, the second gas vent is located rose box roof upper portion, the inside of rose box has set gradually alkaline filtration filter screen, acid filter screen, drying screen from last to down.
The stainless steel filter screen for acid and alkali is mainly used for medium separation such as screening and filtering under the acid and alkali environment condition, gas-liquid filtering and the like. Stainless steel filter screen wires, nickel wires and copper wires are generally adopted as raw materials. The stainless steel filter screen has stable and fine filtering performance.
Furthermore, the first nozzle is a high-pressure atomizing nozzle, and the diameter of the spraying hole is 0.1-0.3 mm; the water supply pressure is 0.6-1.0 Mpa; the second nozzle is a high-speed atomizing nozzle, and the diameter of the spraying hole is 0.05-0.08 mm; the water supply pressure is 1.2-1.5 Mpa.
The spraying holes are small in diameter, the number of the holes is increased, the number of the holes in a unit area is large, and sprayed water drops become thin and are beneficial to contacting with tail gas; the first atomizing nozzle can form atomizing particles with the diameter of about 50-60 microns, the contact area of the atomizing nozzle and surrounding tail gas can be increased, and tiny particles in the tail gas collided by the atomizing particles are mixed with the atomizing particles and then fall down; the second atomizing nozzle can form atomizing particles with the diameter of about 15-20 microns, and tail gas after the first-stage filtration is subjected to further fine dust fall.
Furthermore, a water pump is arranged at one end of the water supply pipe close to the water tank, a bypass branch pipe is arranged at one end far away from the water tank, and a water valve is arranged on the bypass branch pipe; and a water valve is arranged on a pipeline connecting the water suction port of the water pump and the bottom of the water tank.
Water pumps are machines that deliver or pressurize a liquid. The water pump can convey water in the water tank to the water supply pipe through the water pump, and the water can move at a high speed along the water supply pipe under the action of water pressure. The water flows to different branch structures respectively, and each branch mechanism is provided with a water valve, so that the movement of the water can be controlled at any time.
Furthermore, the top of water tank is equipped with the moisturizing mouth, and this moisturizing mouth is connected with the moisturizing pipe, be equipped with the water valve on the moisturizing pipe, the middle part of water tank is provided with the filter screen, the filter screen can be followed the lateral part and taken out.
The water valves arranged on all the road sections can control water circulation and water inlet and outlet, so that the flow can meet the requirements of people.
Further, the one end of air supply pipe is connected with the air exit of draught fan, and the other end communicates with the air inlet that sprays the case, the induction port and the dry tail gas tube coupling of draught fan.
The draught fan rotates through the impeller and produces the negative pressure, and then from the equipment extraction air's equipment, generally installs at the tail end, generally is used for extracting the hot flue gas of intracavity, lets in the spray box with certain pressure with the flue gas simultaneously and removes dust and handle.
Compared with the prior art, the invention has the following advantages: according to the invention, tail gas particles are efficiently removed through pressurization of the induced draft fan and the blocking effect of the secondary spraying and the breathable film, tail gas with impurities or dust enters the spraying box after pressurization, the impurity adsorption capacity of charged liquid drops is greatly improved through twice atomization spraying, and dust removal efficiency is better by combining the atomization mode, and in addition, the impurities are physically isolated through the blocking effect of the breathable film, so that the cleaning rate is up to 95% or even 97%. Through spraying case, heat transfer case tail gas behind the papermaking drying go on the dirt, for the tail gas cooling, the water tank can provide the water source for spraying on the one hand simultaneously, and on the other hand also as the box that the tail water was retrieved, and the tail water of each stage all gets back to the water tank through the pipeline, saves manufacturing cost. The first atomizing nozzle can form atomizing particles with the diameter of about 50-60 microns, the contact area of the atomizing nozzle and surrounding tail gas can be increased, and tiny particles in the tail gas collided by the atomizing particles are mixed with the atomizing particles and then fall down; the second atomizing nozzle can form atomizing particles with the diameter of about 15-20 microns, and tail gas after the first-stage filtration is subjected to further fine dust fall. Through the matching of the interior of the filter box, the tail gas is treated so as to be convenient for subsequent utilization or direct emission, and the purposes of energy conservation and emission reduction are achieved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a partial schematic view of a separator plate according to the present invention.
Description of reference numerals:
1-spraying box, 2-water tank, 3-heat exchange box, 4-filtering box, 5-induced draft fan, 6-water pump, 7-first chamber, 8-second chamber, 9-water supply pipe, 10-water return pipe, 11-water replenishing pipe, 12-first exhaust port, 13-air supply pipe, 14-partition plate, 15-vent hole, 16-first nozzle, 17-second nozzle, 18-second exhaust port, 19-drying net, 20-acid filter net, 21-alkaline filter net, 22-spiral heat exchange pipe, 23-water valve, 24-liquid outlet, 25-liquid return pipe, 26-air outlet, 27-air inlet, 28-vent pipe, 29-bypass branch pipe, 30-breathable film and 31-water filtering box.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings and examples:
it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and any modifications of the structures, changes in the proportions and adjustments of the sizes, without affecting the efficacy and attainment of the same, are intended to fall within the scope of the present disclosure.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
A papermaking drying tail gas recycling device comprises a spraying box 1, a water tank 2, a heat exchange box 3 and a filter box 4; two side walls of the spraying box 1 are respectively provided with an air inlet 27 and an air outlet 26, and tail gas with 2.5-3 times atmospheric pressure is introduced into the air inlet; the inner cavity of the spraying box 1 is divided into a first cavity 7 and a second cavity 8 by a partition plate 14, and at least one power-on nozzle is arranged in each of the first cavity 7 and the second cavity 8; the bottom plate of the spraying box (1) is provided with a grounding end; the voltage between the nozzle and the bottom plate is 6 KV-15 KV; the clapboard 14 is provided with a vent hole 15, and a breathable waterproof film is arranged in the vent hole 15; the upper right end of the spray box 1 is provided with a heat exchange box 3, the heat exchange box 3 is connected with the upper right part of the spray box 1 through a vent pipe 28, and a breathable waterproof film is arranged in the vent pipe 28 between the second chamber 8 and the heat exchange box 3; the right side of the heat exchange box 3 is provided with a filter box 4, the filter box 4 is connected with the heat exchange box 3 through a vent pipe 28, and the filtered tail gas is discharged and recycled. The inside of heat transfer case 3 is provided with multiunit spiral heat exchange tube 22, spiral heat exchange tube 22 one end with breather pipe 28 is connected on the left side wall of heat transfer case 3, the other end with breather pipe 28 on the 3 roof of heat transfer case is connected, and 3 right sides of heat transfer case are equipped with rose box 4, rose box 4 through breather pipe 28 with heat transfer case 3 is connected, 3 lower parts of heat transfer case are equipped with water tank 2, heat transfer case 3 passes through wet return 10 and is connected with 2 tops of water tank. The water tank 2 is connected with the top parts of the spraying tank 1 and the heat exchange tank 3 through a water supply pipe 9, and the water tank 2 is connected with a liquid outlet 24 at the bottom part of the spraying tank 1 through a liquid return pipe 25. A water filtering tank 31 is detachably connected between the liquid return pipe 25 and the water tank 2, and a water filtering device is arranged in the water filtering tank 31.
Papermaking drying tail gas cyclic utilization device sprays the separation effect of atomizing ionization and ventilated membrane through the pressurization of draught fan and second grade for the tail gas granule is high-efficient to be clear away, the tail gas that has impurity or dust gets into after through the pressurization and sprays the case, spray through twice atomizing, electrified liquid drop adsorption of impurities ability promotes greatly, the atomizing form of reunion makes to remove dust and reaches better efficiency, the separation effect of ventilated membrane makes impurity keep apart through physics nature in addition, the clearance rate is up to 95%, 97% even.
Specifically, a filter screen 15 is arranged in the vent hole of the partition board 14, and a breathable film 30 is wrapped on the filter screen 15; the filter screen is the metal filter screen, and the diameter is 1mm, ventilated membrane 30 is PE polymer ventilated membrane.
The tail gas passes through the filter screen, coarse dust is filtered, and then the tail gas passes through the breathable film, however, the water particles of the PE high-molecular breathable film are very fine in a water vapor state, and the PE high-molecular breathable film can smoothly permeate into the capillary to the other side according to the capillary movement principle, so that the vapor permeation phenomenon is generated. After the steam condensation becomes the drop, the granule grow, because the effect of drop surface tension, the hydrone just can not break away from the drop smoothly and permeate the opposite side, has prevented also that the infiltration of water from taking place, makes the ventilated membrane have waterproof function, and the water droplet is by the separation, plays waterproof effect.
Specifically, first nozzle 16 is evenly arranged at the top of first chamber 7, and is located first nozzle 16 is evenly arranged from bottom to top on the adjacent left and right side walls of first chamber 7 of baffle 14, first nozzle 16 on the two side walls with the side wall becomes 45 degrees angle, second nozzle 17 is evenly arranged at the top of second chamber 8, and is located second nozzle 17 is evenly arranged from bottom to top on the adjacent left and right side walls of second chamber 7 of baffle 14, second nozzle 17 on the two side walls with the side wall becomes 135 degrees angle.
When tail gas enters the first chamber through the fan, the temperature of the tail gas is very high, the tail gas can rise rapidly, the first nozzle arranged at the top of the first chamber vertically sprays water downwards, the first nozzles uniformly arranged on the left side wall and the right side wall of the first chamber 7 adjacent to the partition plate 14 from bottom to top form an angle of 45 degrees with the top wall, so that when the nozzles spray water, water flow freely falls and moves, the water flow speed is higher downwards, the water sprayed out by the nozzles downwards can be mutually superposed, the water flow density is higher, the tail gas can be fully showered at the bottom of the first chamber, large particles in the tail gas are fully contacted with the water, the large particles are adhered to the water and stay at the bottom of the first chamber, and the temperature of the tail gas can further fall; most residual tail gas can pass the filter screen entering second cavity on the baffle, the tail gas that gets into the second cavity is located the well upper portion of second cavity, the nozzle of the roof of second cavity is vertical spouts down, from up align to grid down there is second nozzle 17 on 7 left and right sides walls of second cavity that two baffles 14 are adjacent, from up spouting down, rivers will superpose at the well upper portion of second cavity like this, carry out abundant shower to tail gas, make most small particulate matter and water bonding, will make most small particle filtering in the tail gas.
Specifically, the spiral heat exchange tubes 22 are bent to extend into the heat exchange box 3, and vertically extend upwards from the bottom to the top of the heat exchange box 3; the spiral heat exchange tubes 22 are connected with each other through threads.
Cold water is put into the heat exchange box, the temperature of the cold water is between 0-4 degrees, the spiral heat exchange tube 22 bends to stretch into the heat exchange box, the spiral heat exchange tube 22 is soaked in the cold water at the moment, the temperature of the cold water rises through the temperature reduction of tail gas in the heat transfer heat exchange tube, and the temperature of the tail gas penetrating through the heat exchange box is reduced to below 50 degrees.
Particularly, rose box 4 includes alkaline filtration filter screen 21, acid filter screen 20, drying screen 19, first exhaust port 12 and second exhaust port 18, first exhaust port 12 is located 4 lateral wall bottoms of rose box, second exhaust port 18 is located 4 roof upper portion of rose box, the inside of rose box 4 is from last to having set gradually alkaline filtration filter screen 21, acid filter screen 20, drying screen 19 down.
The stainless steel filter screen for acid and alkali is mainly used for medium separation such as screening and filtering under the acid and alkali environment condition, gas-liquid filtering and the like. Stainless steel filter screen wires, nickel wires and copper wires are generally adopted as raw materials. The stainless steel filter screen has stable and fine filtering performance.
Specifically, the first nozzle 16 is a high-pressure atomizing nozzle, and the diameter of a spraying hole is 0.1-0.3 mm; the water supply pressure is 0.6-1.0 Mpa; the second nozzle 17 is a high-speed atomizing nozzle, and the diameter of a spraying hole is 0.05-0.08 mm; the water supply pressure is 1.2-1.5 Mpa.
The spraying holes are small in diameter, the number of the holes is increased, the number of the holes in a unit area is large, and sprayed water drops become thin and are beneficial to contacting with tail gas; the first atomizing nozzle can form atomizing particles with the diameter of about 50-60 microns, the contact area between the atomizing nozzle and surrounding tail gas can be increased, and tiny particles in the tail gas collided by the atomizing particles are mixed with the atomizing particles and then fall down. The second atomizing nozzle can form atomizing particles with the diameter of about 15-20 microns, and tail gas after primary filtration is subjected to further fine dust fall
Specifically, a water pump 6 is arranged at one end of the water supply pipe 9 close to the water tank 1, a bypass branch pipe 29 is arranged at one end far away from the water tank 1, and a water valve 23 is arranged on the bypass branch pipe 29; a water valve 23 is arranged on a pipeline connecting the water suction port of the water pump 6 with the bottom of the water tank 2.
Water pumps are machines that deliver or pressurize a liquid. The water pump can convey water in the water tank to the water supply pipe through the water pump, and the water can move at a high speed along the water supply pipe under the action of water pressure. The water flows to different branch structures respectively, and each branch mechanism is provided with a water valve, so that the movement of the water can be controlled at any time.
Particularly, the top of water tank 2 is equipped with the moisturizing mouth, and this moisturizing mouth is connected with moisturizing pipe 11, be equipped with water valve 23 on the moisturizing pipe 11, the middle part of water tank 2 is provided with the filter screen, the filter screen can be followed the lateral part and taken out.
The water valves arranged on all the road sections can control water circulation and water inlet and outlet, so that the flow can meet the requirements of people.
Particularly, the one end of air supply pipe 13 is connected with the air exit of draught fan 5, and the other end communicates with air inlet 27 of spray box 1, the induction port and the dry tail gas tube coupling of draught fan 5.
The draught fan rotates through the impeller and produces the negative pressure, and then from the equipment extraction air equipment, generally installs at the tail end, generally is used for extracting the hot flue gas of intracavity, has improved the atmospheric pressure in the spray box 1 simultaneously for gas can pass through the ventilated membrane smoothly under certain pressure.
Specifically, the air inlet 27 is disposed at the bottom of the side wall of the first chamber 7, and the air outlet 26 is disposed at the upper portion of the side wall of the second chamber 8.
The air inlet is in the bottom, and the gas outlet is in the upper end, and hot tail gas can constantly rise, and through the injection of nozzle, the granule composition in the tail gas is taken away, reduces the content of impurity in the tail gas.
Dust-containing tail gas enters the spraying box through the fan, spraying water of the first nozzle is strongly mixed with the tail gas when the dust-containing tail gas passes through the first cavity, most dust particles are adhered with water and then remain in the water, the tail gas with water drops cannot pass through the filter screen, the tail gas without the water drops passes through the filter screen and enters the second cavity, and fine particles are further removed through atomization spraying in the second cavity; the tail gas enters the heat exchange box through the spiral heat exchange tube, the temperature of the tail gas is absorbed by water through heat transfer, the acid and alkali property of the tail gas is removed through the filter box by the cooled tail gas, and the clean and cooled tail gas is discharged. The water in the water tank is supplied to the spraying tank and the heat exchange tank through a water supply pipe and then flows back to the water tank through a return pipe, a filtering device is arranged in the water tank, and a water supplementing pipe is used for supplementing water to the water tank when water is deficient.
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (10)
1. The utility model provides a dry tail gas cyclic utilization device of papermaking which characterized in that: comprises a spraying box (1), a heat exchange box (3) and a filter box (4); two side walls of the spraying box (1) are respectively provided with an air inlet (27) and an air outlet (26), and tail gas with 2.5-3 times of atmospheric pressure is introduced into the air inlet; the inner cavity of the spraying box (1) is divided into a first cavity (7) and a second cavity (8) through a partition plate (14), and at least one electrifying nozzle is arranged in each of the first cavity (7) and the second cavity (8); the bottom plate of the spraying box (1) is provided with a grounding end; the voltage between the nozzle and the bottom plate is 6 KV-15 KV; the partition board (14) is provided with a vent hole (15), and a breathable waterproof film is arranged in the vent hole (15); a heat exchange box (3) is arranged at the upper right end of the spraying box (1), the heat exchange box (3) is connected with the upper right part of the second cavity (8) through a vent pipe (28), and a breathable waterproof film is arranged in the vent pipe (28) between the second cavity (8) and the heat exchange box (3); the right side of the heat exchange box (3) is provided with a filter box (4), the filter box (4) is connected with the heat exchange box (3) through a vent pipe (28), and the filtered tail gas is recycled after being discharged.
2. The papermaking drying tail gas recycling device according to claim 1, characterized in that: the inside of heat transfer case (3) is provided with multiunit spiral heat exchange tube (22), the one end of spiral heat exchange tube (22) with breather pipe (28) are connected on the left side wall of heat transfer case (3), the other end with breather pipe (28) on heat transfer case (3) roof are connected, heat transfer case (3) lower part is equipped with water tank (2), heat transfer case (3) through wet return (10) with water tank (2) top is connected. Water tank (2) through delivery pipe (9) with spray the top of nozzle and heat transfer case (3) in case (1) and be connected, water tank (2) through return liquid pipe (25) with spray the bottom liquid outlet (24) of case (1) and connect, it is connected with water strainer (31) to return detachably between liquid pipe (25) and water tank (2), water strainer (31) are provided with the drainage equipment.
3. The papermaking drying tail gas recycling device according to claim 1, characterized in that: a filter screen (15) is arranged in the vent hole of the clapboard (14), and a breathable film (30) is wrapped on the filter screen (15); the filter screen is a metal filter screen, the diameter of the metal filter screen is 1mm, and the breathable film (30) is a PE (polyethylene) macromolecular breathable film.
4. The papermaking drying tail gas recycling device according to claim 1, characterized in that: first cavity (7) top align to grid has first nozzle (16), is located from up align to grid has first nozzle (16) on the wall of the first cavity (7) left and right sides that baffle (14) are adjacent, first nozzle (16) on the wall of both sides with the lateral wall becomes 45 degrees angles, second cavity (8) top align to grid has second nozzle (17), is located from up align to grid has second nozzle (17) on the wall of the second cavity (7) left and right sides that baffle (14) are adjacent, second nozzle (17) on the wall of both sides with the lateral wall becomes 135 degrees angles.
5. The papermaking drying tail gas recycling device according to claim 1, characterized in that: the spiral heat exchange tubes (22) are bent and extend into the heat exchange box (3) and vertically extend upwards from the bottom to the top of the heat exchange box (3); the spiral heat exchange tubes (22) are connected through threads.
6. The papermaking drying tail gas recycling device according to claim 1, characterized in that: rose box (4) are including alkaline filter screen (21), acid filter screen (20), drying screen (19), first exhaust port (12) and second exhaust port (18), first exhaust port (12) are located rose box (4) lateral wall bottom, second exhaust port (18) are located rose box (4) roof upper portion, the inside of rose box (4) is from last to having set gradually alkaline filter screen (21), acid filter screen (20), drying screen (19) down.
7. The paper making drying tail gas recycling device according to any one of claims 1 to 3, characterized in that: the first nozzle (16) is a high-pressure atomizing nozzle, and the diameter of a spraying hole is 0.1-0.3 mm; the water supply pressure is 0.6-1.0 Mpa; the second nozzle (17) is a high-pressure atomizing nozzle, and the diameter of a spraying hole is 0.05-0.08 mm; the water supply pressure is 1.2-1.5 Mpa.
8. The paper making drying tail gas recycling device according to any one of claims 1 to 5, characterized in that: a water pump (6) is arranged at one end of the water supply pipe (9) close to the water tank (1), a bypass branch pipe (29) is arranged at one end far away from the water tank (1), and a water valve (23) is arranged on the bypass branch pipe (29); a water valve (23) is arranged on a pipeline connecting the water suction port of the water pump (6) and the bottom of the water tank (2).
9. The paper making drying tail gas recycling device according to claim 7, characterized in that: the top of water tank (2) is equipped with the moisturizing mouth, and this moisturizing mouth is connected with moisturizing pipe (11), be equipped with water valve (23) on moisturizing pipe (11), the middle part of water tank (2) is provided with the filter screen, the filter screen can be followed the lateral part and taken out.
10. The papermaking drying tail gas recycling device according to claim 1, characterized in that: the one end of air supply pipe (13) is connected with the air exit of draught fan (5), and the other end communicates with air inlet (27) of spraying case (1), the induction port and the dry tail gas tube coupling of draught fan (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911299148.9A CN110935276A (en) | 2019-12-17 | 2019-12-17 | Papermaking drying tail gas cyclic utilization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911299148.9A CN110935276A (en) | 2019-12-17 | 2019-12-17 | Papermaking drying tail gas cyclic utilization device |
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| CN110935276A true CN110935276A (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911299148.9A Pending CN110935276A (en) | 2019-12-17 | 2019-12-17 | Papermaking drying tail gas cyclic utilization device |
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| US4624190A (en) * | 1984-02-15 | 1986-11-25 | Silvano Cappi | Apparatus for the disposal of flue gas from gas or liquid-fuel boiler-burner groups |
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Address after: 324400 Sha lake, Lake Town, Longyou County, Quzhou, Zhejiang Applicant after: Zhejiang Jinlong Renewable Resources Technology Co.,Ltd. Address before: 324400 Sha lake, Lake Town, Longyou County, Quzhou, Zhejiang Applicant before: ZHEJIANG JINLONG PAPER Co.,Ltd. |
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Application publication date: 20200331 |