CN115178070B - Desulfurization and denitration system and method capable of realizing self-energy supply through thermal circulation - Google Patents
Desulfurization and denitration system and method capable of realizing self-energy supply through thermal circulation Download PDFInfo
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- CN115178070B CN115178070B CN202210848223.8A CN202210848223A CN115178070B CN 115178070 B CN115178070 B CN 115178070B CN 202210848223 A CN202210848223 A CN 202210848223A CN 115178070 B CN115178070 B CN 115178070B
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B01D—SEPARATION
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- 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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- 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
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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Abstract
The invention relates to the field of environmental protection, and discloses a desulfurization and denitration system capable of realizing self-energy by thermal circulation and a desulfurization and denitration method. Compared with the prior art, the method has the advantages that the denitrification and denitration effect on waste gas is improved by improving the reaction time of the mixed gas, the desulfurization effect is promoted by an intermittent spraying mode, and the desulfurization and denitration purifying effect on hot waste gas is fully improved.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to a desulfurization and denitration system capable of realizing self-energy supply by thermal circulation and a method thereof.
Background
Sulfur oxides and nitrogen oxides are currently the most dominant sources of pollution for atmospheric pollution. Coal is used as a main energy source at present, is still widely applied in industry, is difficult to change in a short period of time, is widely applied in traditional steel, cement, building and coal-fired industries, and generates main sources of sulfur oxides, nitrogen oxides and other heavy metals causing atmospheric pollution after coal combustion. Researchers mainly pay attention to how to purify the coal-fired flue gas before or during the discharge process, and remove harmful sulfur oxides, nitrogen oxides and other heavy metal elements in the coal-fired flue gas, namely desulfurization and denitration.
In the prior art, chinese patent document with publication number CN107875825B proposes a smoke and dust denitration and sulfur removal environmental protection device, by setting a denitrification chamber and a desulfurization chamber respectively, not only the efficiency of removing nitrogen oxides and sulfur oxides from smoke and dust is improved, but also the residual water vapor in the denitrification chamber is used as the raw material of the desulfurization chamber, heat is recycled, when in actual desulfurization and denitration, sufficient mixing reaction time is not obtained by adopting ozone and nitrogen oxide gas mixing process, thus the overall denitration effect can be affected, in addition, during desulfurization, the water contained in the gas is not enough to react with calcium oxide to generate sufficient calcium hydroxide, thus affecting the overall desulfurization effect.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a desulfurization and denitration system and method capable of realizing self-energy supply by thermal circulation, which have the advantages of improving desulfurization and denitration effects and the like, and solve the series of problems of unsatisfactory desulfurization and denitration effects and the like in the prior art.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the desulfurization and denitration system capable of realizing heat circulation and self energy supply comprises a denitration chamber and a desulfurization chamber, wherein the denitration chamber and the desulfurization chamber are used for respectively removing nitrate and sulfur, one side of the denitration chamber is also provided with an air pump for adsorbing waste gas and ozone, the output end of the air pump is sequentially communicated with the denitration chamber and the desulfurization chamber, the denitration chamber and the desulfurization chamber are also provided with spray pipes which synchronously rotate, the desulfurization chamber is also provided with diffusion discs for storing calcium oxide powder, and the positions of the spray pipes correspond to the positions of the diffusion discs; a phase change heat storage material is arranged in the inner wall of the desulfurization chamber; an intermittent assembly is further arranged between the air pump and the denitration chamber and is used for mixing waste gas and ozone and intermittently discharging mixed reaction gas, the intermittent assembly comprises a deformable rubber air bag and an elastic assembly which is arranged on the periphery of the rubber air bag and used for promoting the resetting of the rubber air bag, and the output end of the air pump is communicated with the input end of the rubber air bag through a same conveying pipe;
the conveying pipe is also provided with a linkage assembly for driving the spraying pipe to rotate, the linkage assembly comprises a plurality of turntables rotatably arranged in the conveying pipe, and the positions of the turntables are matched with the flow direction of gas in the conveying pipe;
the two ends of the rubber air bag are fixedly sleeved with hard pipes, one end of the conveying pipe is fixedly communicated with the adjacent hard pipes, one end of the conical pipe positioned in the hard pipe is conical, the other end of the conical pipe is communicated with a Z-shaped shrinkage pipe, the inner diameters of the two ends of the shrinkage pipe are different, the inner diameter of the bottom end of the shrinkage pipe connected with the rubber air bag is larger than that of the top end of the shrinkage pipe connected with the denitration chamber, the inner diameter of the shrinkage pipe gradually decreases from the bottom end to the top end, and an electromagnetic valve is arranged on the bottom end of the shrinkage pipe connected with the rubber air bag;
the elastic assembly comprises two arc-shaped discs which are positioned at the outer side of the rubber air bag and are attached to the rubber air bag, a U-shaped table is further arranged on the periphery of the rubber air bag, a plurality of horizontal guide rods with the same height are sleeved on two opposite sides of the U-shaped table in a sliding mode, the two arc-shaped discs are respectively and fixedly connected to one ends of the plurality of horizontal guide rods on the corresponding side, return springs are sleeved on the two horizontal guide rods, and two ends of each return spring are respectively abutted to the side wall of the U-shaped table and the arc-shaped disc on the corresponding side;
the rotary shaft is rotatably arranged on the conveying pipe, the bottom end of the rotary shaft extends into the conveying pipe, the rotary tables are fixedly connected to the bottom end of the rotary shaft, a fixing seat and an extension seat are fixedly arranged on the U-shaped table, the top end of the rotary shaft penetrates through the extension seat, a driving rod is rotatably arranged on the fixing seat, and bevel gears meshed with one end of the driving rod and one end of the rotary shaft are fixedly arranged at one end of the driving rod;
the fixed seat and the outer wall of the denitration chamber are rotatably provided with the same speed reducing shaft, one end of the speed reducing shaft and the other end of the driving rod are fixedly provided with first belt pulleys with different outer diameters, the top ends of the denitration chamber and the desulfurization chamber are rotatably sleeved with two rotating pipes with the same height, the one end of the rotating pipe of denitration room upper end is the confined state, the other end of the deceleration axle with the confined state's of rotating pipe one end is all fixed mounting has the second belt pulley that the external diameter is different, and two tensioning has a common first driving belt on the first belt pulley, two tensioning has a common second driving belt on the second belt pulley.
Further, the input end of the air pump is communicated with an exhaust gas inlet end and an ozone inlet end which are arranged in parallel, the other end of the exhaust gas inlet end is communicated with an external exhaust gas output end, and the other end of the ozone inlet end is communicated with an external ozone output end.
Further, a denitration ring pipe is fixedly arranged on the inner wall of the denitration chamber, and the top end of the shrinkage pipe connected with the denitration chamber penetrates through the denitration chamber and is communicated with the denitration ring pipe;
a desulfurization ring pipe is fixedly arranged on the inner wall of the desulfurization chamber, the bottom end of the denitration chamber is communicated with a gas communicating pipe, and the other end of the gas communicating pipe penetrates through the desulfurization chamber and is communicated with the desulfurization ring pipe;
the denitration ring pipe with a plurality of evenly distributed fumaroles have all been seted up on the lateral wall of desulfurization ring pipe, just still fixed cover is equipped with the supporting disk on the inner wall of desulfurization room, fixedly connected with rather than coaxial tray on the supporting disk, the diffusion dish is installed the top of tray, a plurality of evenly distributed diffusion holes have been seted up on the outer wall of diffusion dish, just a plurality of in the desulfurization room the fumaroles with a plurality of the highly uniform of diffusion hole.
Further, the inner walls of the denitration chamber and the desulfurization chamber are respectively sleeved with arc-shaped rings respectively positioned on the denitration ring pipe and the desulfurization ring pipe, and the inner diameters of the arc-shaped rings are larger than the inner diameters of the denitration ring pipe and the desulfurization ring pipe.
Further, the tray is in a round table shape, a plurality of spraying grooves with different widths are formed in the outer wall of the tray, and the positions of the spraying grooves are matched with the heights of the diffusion holes in the desulfurization chamber.
Further, the two rotating pipes in the middle are communicated with one liquid communicating pipe, two spraying pipes which are respectively positioned in the denitration chamber and the desulfurization chamber are respectively communicated with one end of the corresponding rotating pipe, the other end of the rotating pipe at the upper end of the desulfurization chamber is communicated with an external water supply end, and a plurality of evenly distributed spraying holes are vertically and downwards formed in the two spraying pipes along the axial straight line of the spraying pipes.
The invention also provides a desulfurization and denitration method capable of realizing self-energy by thermal circulation, which is applied to the desulfurization and denitration system capable of realizing self-energy by thermal circulation and comprises the following steps of:
s1, denitration: the mixed gas of ozone and waste gas is sucked together by using the air pump and is conveyed into the rubber air bag through the conveying pipe, the mixed gas entering the rubber air bag is stored in the rubber air bag along with intermittent expansion and contraction of the rubber air bag and fully reacts, the reacted mixed gas is conveyed into the denitration chamber, and when the mixed gas is conveyed through the conveying pipe, the gas flows and drives a plurality of turntables to synchronously rotate, so that two spraying pipes are driven to synchronously rotate to spray in the denitration chamber and the desulfurization chamber, the mixed gas reacts in the denitration chamber to generate nitric acid, N element in the waste gas is removed, and denitration is realized;
s2, desulfurization: introducing the mixed gas reacted in the step S1 into a desulfurization chamber, releasing calcium oxide in a diffusion disc and the mixed gas released in the desulfurization chamber and reacted in the step S1, and converting S element in waste gas into CaSO by combining calcium hydroxide generated by calcium oxide and water sprayed by a Su Sou spray pipe 4 Precipitation, realizing desulfurization, wherein heat released in the reaction process is stored by a phase change heat storage material in the desulfurization chamber and used for releasing the stored heat to maintain the temperature condition required by the reaction in the desulfurization chamber when the ambient temperature is lower than the reaction condition temperature in the desulfurization chamber;
s3, dedusting: and (2) introducing the mixed gas subjected to the desulfurization treatment in the step (S2) into a bag-type dust remover to remove dust and complete desulfurization, denitration and purification operation of waste gas.
(III) beneficial effects
Compared with the prior art, the invention provides a desulfurization and denitration system and method capable of realizing self-energy supply by thermal cycle, and the desulfurization and denitration system and method have the following beneficial effects:
1. according to the desulfurization and denitration system and method capable of realizing heat circulation and self-energy supply, mixed gas of ozone and waste gas is conveyed into the rubber air bag through the air pump, and the mixed gas is matched with the electromagnetic valve to be opened and closed, so that N generated in the rubber air bag is caused under the elastic action of the rubber air bag and the reset spring 2 O 5 The gas and other gases intermittently enter the denitration chamber to increase the reaction time of the mixed gas, thereby increasing the concentration of the gas generated by the reaction, and the inner diameter of the shrinkage tube is gradually reduced, so that the reaction rate of the mixed gas in the conveying process can be promoted, and compared with the prior art, the N is fully increased 2 O 5 The concentration of gas entering the denitration chamber indirectly improves the denitration effect on waste gas.
2. According to the desulfurization and denitration system and method capable of realizing heat circulation and self energy supply, waste gas flows and drives a plurality of turntables to synchronously rotate, two spraying pipes are indirectly driven to synchronously rotate, the inside of a denitration chamber and a desulfurization chamber are sprayed in a rotating mode, the utilization rate of waste gas is improved, meanwhile, denitration reaction and desulfurization reaction are promoted, generated calcium sulfate precipitate can be flushed away in time, sufficient contact between calcium hydroxide and sulfur dioxide gas is ensured, desulfurization rate is improved, and efficient desulfurization and denitration are realized; in the process of generating calcium hydroxide in the desulfurization chamber, the calcium oxide is heated when meeting water, and the calcium hydroxide reacts with sulfur dioxide and oxygen to generate CaSO 4 +H 2 O is also exothermic reaction, so that redundant heat can be stored by the phase change heat storage material in the inner wall of the desulfurization chamber, and when the outdoor temperature is lower than the indoor temperature of the desulfurization chamber, the sulfur dioxide is fixed to generate CaSO 4 When the proper temperature is needed by the reaction, the phase-change heat storage material releases heat again to maintain the temperature of the reaction condition needed by the desulfurization chamber, so that the technology of storing the chemical heat generated by the reaction in the desulfurization chamber and further thermally cycling to maintain the temperature of the reaction condition needed by the desulfurization reaction in the desulfurization chamber is realized.
3. This but desulfurization denitration system and method of thermal cycle self-powered for the calcium hydroxide solution that the reaction produced easily flows on the round platform surface through setting up the tray of round platform form, simultaneously, sets up a plurality of spray grooves, has enlarged the area of contact of calcium hydroxide solution and sulfur dioxide gas, realizes abundant desulfurization reaction, further improves desulfurization effect, in addition, through setting up the arc circle, avoids the water source entering denitration ring canal that sprays through the shower to lead to the fact the backward flow in desulfurization ring canal with the desulfurization ring canal.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of a partially cut-away perspective view of the present invention;
FIG. 3 is a schematic view of a portion of a three-dimensional structure of the present invention;
FIG. 4 is a schematic view of a cut-away view of a delivery tube according to the present invention;
FIG. 5 is a schematic perspective view of a rubber air bag according to the present invention;
FIG. 6 is a schematic view of another perspective view of the rubber bladder of the present invention;
FIG. 7 is a schematic view of a sectional view of a denitration chamber according to the present invention;
FIG. 8 is a schematic view showing a cross-sectional structure of a desulfurization chamber of the present invention;
FIG. 9 is a schematic perspective view of the desulfurization chamber in another perspective view.
In the figure: 1. an air pump; 2. an exhaust gas inlet end; 3. an ozone inlet end; 4. a delivery tube; 5. a conical tube; 6. a rubber air bag; 7. a hard tube; 8. a shrink tube; 9. a denitration chamber; 10. a denitration ring pipe; 11. a gas communicating tube; 12. a desulfurization chamber; 13. a desulphurisation loop; 14. a gas injection hole; 15. a U-shaped table; 16. a horizontal guide rod; 17. an arc-shaped disc; 18. a return spring; 19. a shower pipe; 20. a spray hole; 21. a liquid communication tube; 22. a diffusion disc; 23. diffusion holes; 24. an arc ring; 25. a fixing seat; 26. a rotating shaft; 27. a turntable; 28. bevel gears; 29. an extension base; 30. a first pulley; 31. a reduction shaft; 32. a second pulley; 33. an electromagnetic valve; 34. and a support plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As described in the background art, the prior art has shortcomings, and in order to solve the technical problems as described above, the application provides a desulfurization and denitration system and method capable of realizing self-energy supply through thermal circulation.
In a typical embodiment of the application, as shown in fig. 1-9, a desulfurization and denitration system capable of self-supplying energy by thermal cycle comprises a denitration chamber 9 and a desulfurization chamber 12 for respectively removing nitrate and desulfurizing, wherein one side of the denitration chamber 9 is also provided with an air pump 1 for adsorbing waste gas and ozone, the output end of the air pump 1 is sequentially communicated with the denitration chamber 9 and the desulfurization chamber 12, and a phase change heat storage material is arranged in the inner wall of the desulfurization chamber 12; the denitration chamber 9 and the desulfurization chamber 12 are internally provided with spray pipes 19 which rotate synchronously, the desulfurization chamber 12 is internally provided with diffusion discs 22 for storing calcium oxide powder, the positions of the spray pipes 19 correspond to the positions of the diffusion discs 22, an intermittent assembly is further arranged between the air pump 1 and the denitration chamber 9 and is used for mixing waste gas and ozone and intermittently discharging mixed reaction gas, the intermittent assembly comprises a deformable rubber air bag 6 and an elastic assembly which is arranged at the periphery of the rubber air bag 6 and promotes the reset of the rubber air bag 6, the output end of the air pump 1 is communicated with the input end of the rubber air bag 6, the same conveying pipe 4 is communicated with the output end of the air pump 1, the conveying pipe 4 is also provided with a linkage assembly which is used for driving the spray pipes 19 to rotate, the linkage assembly comprises a plurality of turntables 27 which are rotatably arranged in the conveying pipe 4, the positions of the turntables 27 are matched with the flow direction of gas in the conveying pipe 4, and when the system and the method are used for purifying waste gas, the related denitration and desulfurization chemical reaction are as follows: o (O) 3 +NO→NO 2 +O 2 、O 3 +NO 2 →NO 3 +O 2 、NO 2 +NO 3 →N 2 O 5 、N 2 O 5 +H 2 O→HNO 3 ；CaO+H 2 O→Ca(OH) 2 、Ca(OH) 2 +SO 2 +O 2 →CaSO 4 +H 2 O, detailed reaction description is described in Chinese patent document with publication number CN107875825B, and details are not described herein, when the system is operated, ozone and waste gas are sucked together through the air pump 1 and are conveyed into the rubber air bag 6 through the conveying pipe 4, the rubber air bag 6 is intermittently expanded and contracted, and the valve on the other side of the rubber air bag 6 is matched to operate, so that the mixed gas is stored in the rubber air bag 6 for a period of time, after full reaction, the reacted mixed gas is conveyed into the denitration chamber 9, and N entering the denitration chamber 9 can be improved 2 O 5 The gas concentration of the denitration chamber 9 and the spraying effect of the spraying pipes 19 in the denitration chamber 9 are matched, nitric acid is fully reacted to realize the high removal of N element, meanwhile, when the gas is conveyed through the conveying pipe 4, the rotating disk 27 can be driven, the two spraying pipes 19 are driven to synchronously and continuously rotate through the linkage component, the spraying effect on the denitration chamber 9 and the desulfurization chamber 12 is improved, under the pushing effect of waste gas, the mixing degree of mixed gas can be improved through the rotation of the rotating disks 27, the reaction rate of ozone and N element in the waste gas is improved, calcium oxide powder in the desulfurization chamber 12 can be sprayed and matched with water contained in the gas to promote the reaction to generate calcium hydroxide, in the process of generating calcium hydroxide, calcium oxide is heated when meeting water, and the calcium hydroxide reacts with sulfur dioxide and oxygen to generate CaSO 4 +H 2 O is also exothermic reaction, so that excessive heat can be stored by the phase change heat storage material in the inner wall of the desulfurization chamber 12, and when the outdoor temperature is lower than the indoor temperature, the sulfur dioxide is fixed in the desulfurization chamber to generate CaSO 4 When the proper temperature is needed by the reaction, the phase-change heat storage material releases heat to maintain the temperature of the reaction condition needed by the desulfurization chamber, so that the technology of storing the chemical heat generated by the reaction in the desulfurization chamber and further thermally cycling to maintain the temperature of the reaction condition needed by the desulfurization reaction in the desulfurization chamber is realized; the spraying pipe 19 can wash the calcium sulfate generated by the reaction intermittently in the desulfurization chamber 12, so that the calcium sulfate covered on the surface is prevented from influencing the contact reaction of calcium hydroxide and sulfur dioxide gas, the desulfurization and denitration purification efficiency of the waste gas is fully improved, and meanwhile, the kinetic energy of the discharged gas can be utilized to drive the turntable 27 to drive the turntable, so that the desulfurization and denitration purification efficiency of the waste gas is fully improvedSelf-energizing.
The working principle of the phase-change heat-storage material is that when the reaction is carried out in the desulfurization chamber to generate redundant heat, the heat is absorbed, when the phase-change point is reached, the heat is melted, the heat is absorbed and stored, when the external temperature is lower, the phase-change material is cooled, the stored latent heat is dissipated into the desulfurization chamber 12 to keep the proper temperature required by desulfurization reaction in the desulfurization chamber, and the phase-change heat-storage material used by the invention can be Na 2 SO 4 ·10H 2 O、FeBr 2 ·6H 2 50-65% of O and LiNO 3 ·3H 2 Ni (NO) with mass fraction of 35-45% of O 3 ) 2 CaCl with mass fraction of 60% -70% 2 ·6H 2 MgCl with 30-40% of O compound mass fraction 2 ·6H 2 O、Mn(NO 3 ) 2 ·6H 2 O and other phase change materials.
As a preferred implementation manner in this embodiment, the input end of the air pump 1 is communicated with the parallel exhaust gas inlet end 2 and the ozone inlet end 3, the other end of the exhaust gas inlet end 2 is communicated with the external exhaust gas output end, the other end of the ozone inlet end 3 is communicated with the external ozone output end, the hard tube 7 is fixedly sleeved at both ends of the rubber air bag 6, one end of the conveying tube 4 is fixedly communicated with one conical tube 5 in the adjacent hard tube 7, one end of the conical tube 5 in the hard tube 7 is conical, the other hard tube 7 is communicated with the shrinkage tube 8, the inner diameters of both ends of the shrinkage tube 8 are different, the shrinkage tube 8 is provided with an electromagnetic valve 33, the elastic component comprises two arc-shaped discs 17 positioned at the outer side of the rubber air bag 6 and attached to the shrinkage tube, the U-shaped table 15 is further installed at the periphery of the rubber air bag 6, a plurality of horizontal guide rods 16 with consistent heights are sleeved at both opposite sides on the U-shaped table 15 in a sliding mode, one end of the plurality of horizontal guide rods 16 on the corresponding sides are respectively fixedly connected, reset springs 18 are sleeved on both horizontal guide rods 16, the two arc-shaped discs 18 are also sleeved on the two horizontal guide rods 16 at this time, the reset springs 18 are connected at the same time, the end of the two end of the corresponding U-shaped guide rods 18, the U-shaped guide rods 18 are abutted to the two ends of the U-shaped table 17 on the periphery of the rubber air bag 15, and the rubber air bag 6 are abutted to the two ends, and the air bag 1 are matched with the air inlet end through the electromagnetic valve 33, and the air inlet end 3, and the exhaust gas is purified by the air pump 1, and the exhaust gas is conveyed to the air pump 1 and the air, and the air inlet end and the air pump 1 and has been purified and the air and has been purified and mixed at the end and the end and hasThe gas continuously enters the rubber air bag 6 and promotes the rubber air bag 6 to continuously expand, meanwhile, under the guiding action of the horizontal guide rods 16 at the two sides, the arc-shaped discs 17 at the two sides are far away from each other, the return spring 18 is in a compressed state, after the mixed gas in the rubber air bag 6 reacts for a period of time, the electromagnetic valve 33 is opened, and under the elastic action of the rubber air bag 6 and the return spring 18, N generated in the rubber air bag 6 is caused 2 O 5 The gas and other gases enter the denitration chamber 9 along the shrinkage tube 8, and the reaction rate of the mixed gas in the conveying process can be promoted due to the gradual reduction of the inner diameter of the shrinkage tube 8, compared with the prior art, the N is improved 2 O 5 The concentration of the gas entering the denitration chamber 9 indirectly improves the denitration effect on the waste gas.
As a preferred implementation manner in the embodiment, a denitration ring pipe 10 is fixedly arranged on the inner wall of the denitration chamber 9, the top end of the shrinkage tube 8 penetrates through the denitration chamber 9 and is communicated with the denitration ring pipe 10, a desulfurization ring pipe 13 is fixedly arranged on the inner wall of the desulfurization chamber 12, the bottom end of the denitration chamber 9 is communicated with a gas communicating pipe 11, the other end of the gas communicating pipe 11 penetrates through the desulfurization chamber 12 and is communicated with the desulfurization ring pipe 13, a plurality of uniformly distributed air injection holes 14 are formed in the side walls of the denitration ring pipe 10 and the desulfurization ring pipe 13, a supporting disc 34 is fixedly sleeved on the inner wall of the desulfurization chamber 12, a tray coaxial with the supporting disc 34 is fixedly connected with the supporting disc, a diffusion disc 22 is arranged on the top of the tray, a plurality of uniformly distributed diffusion holes 23 are formed in the outer wall of the diffusion disc 22, the heights of the plurality of air injection holes 14 and the plurality of diffusion holes 23 in the desulfurization chamber 12 are consistent, the top ends of the denitration chamber 9 and the desulfurization chamber 12 are respectively sleeved with two rotating pipes with consistent heights, the two rotating pipes in the middle are communicated with one liquid communicating pipe 21, two ends of the two spraying pipes 19 are respectively communicated with one end of the corresponding rotating pipe, the other end of the rotating pipe at the upper end of the desulfurization chamber 12 is communicated with an external water supply end, one end of the rotating pipe at the upper end of the denitration chamber 9 is in a closed state, a plurality of evenly distributed spray holes 20 are formed in the two spraying pipes 19, a rotating shaft 26 is rotatably arranged on the conveying pipe 4, the bottom end of the rotating shaft 26 extends into the conveying pipe 4, a plurality of turntables 27 are fixedly connected to the bottom end of the rotating shaft 26, and a solid is fixedly arranged on the U-shaped table 15The fixed seat 25 and the extension seat 29, the top of the rotating shaft 26 penetrates the extension seat 29, the fixed seat 25 is rotatably provided with a driving rod, one end of the driving rod and one end of the rotating shaft 26 are fixedly provided with bevel gears 28 which are meshed, the fixed seat 25 and the outer wall of the denitration chamber 9 are rotatably provided with the same speed reducing shaft 31, one end of the speed reducing shaft 31 and the other end of the driving rod are fixedly provided with first belt pulleys 30 with different outer diameters, the other end of the speed reducing shaft 31 and one end of the end rotating tube are fixedly provided with second belt pulleys 32 with different outer diameters, the two first belt pulleys 30 are tensioned with a common first driving belt, the two second belt pulleys 32 are tensioned with a common second driving belt, and when waste gas is purified, water sources are input into the two spraying pipes 19 through the rotating tube at the rightmost end, and the N in the denitration chamber 9 is sprayed out through the spray water sources through the spray holes 20 at the corresponding positions, and the N in the denitration ring pipe 10 and the air spraying holes 14 thereon 2 O 5 The gas reacts with water to generate nitric acid, denitrification and denitration are realized, other mixed gas is conveyed into the desulfurization chamber 12 through the gas communicating pipe 11, calcium oxide in the diffusion disc 22 reacts with water to generate calcium hydroxide in the desulfurization chamber 12, the desulfurization ring pipe 13 at the corresponding position and a plurality of air injection holes 14 on the diffusion disc 22 jet out mixed gas containing sulfur dioxide gas, the mixed gas contacts with the calcium hydroxide and reacts to generate calcium sulfate insoluble in water, desulfurization is realized, meanwhile, when the gas is continuously conveyed through the conveying pipe 4, the gas flows and drives a plurality of turntables 27 to synchronously rotate, so that the rotating shaft 26 rotates, under the linkage effect of the bevel gear 28 and the first belt pulley 30, the speed reducing shaft 31 rotates, so that the second belt pulley 32 drives the two spraying pipes 19 to synchronously rotate under the effect of the driving belt, the denitration chamber 9 and the inside of the desulfurization chamber 12 are sprayed in a rotating way, the power self-energy supply when the waste gas is further utilized to be expelled, the generated calcium sulfate precipitation is promoted by the promotion of the denitration reaction and the desulfurization reaction, the sufficient contact between the calcium sulfate and sulfur dioxide gas can also be timely washed down, the desulfurization rate is improved, and high-efficient desulfurization and denitration is realized.
As a preferred implementation manner in this embodiment, the inner walls of the denitration chamber 9 and the desulfurization chamber 12 are also respectively sleeved with an arc ring 24 respectively located on the denitration ring pipe 10 and the desulfurization ring pipe 13, the inner diameter of the arc ring 24 is larger than the inner diameters of the denitration ring pipe 10 and the desulfurization ring pipe 13, the tray is in a round table shape, the outer wall of the tray is provided with a plurality of spray grooves with different widths, the positions of the spray grooves are matched with the heights of the diffusion holes 23 in the desulfurization chamber 12, and the tray in the round table shape is arranged to enable calcium hydroxide solution generated by reaction to flow easily on the surface of the round table, and meanwhile, the spray grooves are formed, so that the contact area between the calcium hydroxide solution and sulfur dioxide gas is enlarged, full desulfurization reaction is realized, and further desulfurization effect is improved.
The invention also provides a desulfurization and denitration method capable of realizing self-energy by thermal circulation, which is particularly applied to the desulfurization and denitration system capable of realizing self-energy by thermal circulation, and comprises the following steps of:
s1, denitration: the mixed gas of ozone and waste gas is sucked together by using the air pump 1 and is conveyed into the rubber air bag 6 through the conveying pipe 4, the mixed gas entering the rubber air bag 6 is stored in the rubber air bag along with intermittent expansion and contraction of the rubber air bag 6 and fully reacts, the reacted mixed gas is conveyed into the denitration chamber 9, and when the mixed gas is conveyed through the conveying pipe 4, the gas flows and drives the plurality of turntables 27 to synchronously rotate, so that the two spraying pipes 19 are driven to synchronously rotate to spray in the denitration chamber 9 and the desulfurization chamber 12, nitric acid is generated by the reaction of the mixed gas in the denitration chamber 9, N element in the waste gas is removed, and denitration is realized;
s2, desulfurization: introducing the mixed gas after the reaction in the step S1 into a desulfurization chamber 12, releasing calcium oxide in a diffusion disc 22 and the mixed gas after the reaction in the step S1 released in the desulfurization chamber 12, and converting S element in waste gas into CaSO by combining the calcium hydroxide generated by the calcium oxide and water sprayed by a spray pipe 19 4 Precipitation, realizing desulfurization, wherein heat released in the reaction process is stored by the phase change heat storage material in the desulfurization chamber 12 and used for releasing the stored heat to maintain the temperature condition required by the reaction in the desulfurization chamber 12 when the ambient temperature is lower than the reaction condition temperature in the desulfurization chamber 12;
s3, dedusting: and (3) introducing the mixed gas subjected to the desulfurization treatment in the step (S2) into a bag-type dust remover to remove dust and complete desulfurization and denitration purification operation of waste gas.
The working principle of the invention is as follows: when the waste gas is purified, the air pump 1 operates, waste gas and ozone gas are mixed and adsorbed into the air pump 1 through the waste gas inlet end 2 and the ozone inlet end 3 and are conveyed into the rubber air bag 6 through the conveying pipe 4, the electromagnetic valve 33 is closed at the moment, the mixed gas continuously enters the rubber air bag 6 and is caused to continuously expand, meanwhile, under the guiding action of the horizontal guide rods 16 on two sides, the arc-shaped discs 17 on two sides are far away from each other, the return spring 18 is in a compressed state, after the mixed gas in the rubber air bag 6 reacts for a period of time, the electromagnetic valve 33 is opened, and under the elastic action of the rubber air bag 6 and the return spring 18, N generated in the rubber air bag 6 is caused to be generated 2 O 5 The gas and other gases enter the denitration chamber 9 along the shrinkage tube 8, and the reaction rate of the mixed gas in the conveying process can be promoted due to the gradual reduction of the inner diameter of the shrinkage tube 8, compared with the prior art, the N is improved 2 O 5 The concentration of the gas entering the denitration chamber 9 indirectly improves the denitration effect on the waste gas.
When the waste gas is purified, water source is input into two spray pipes 19 through the end parts of the rotating pipes, and sprayed out in mist form through a plurality of spray holes 20 at corresponding positions, and enters N in the denitration chamber 9 through the denitration ring pipe 10 and the spray holes 14 on the denitration ring pipe 2 O 5 The gas reacts with water to generate nitric acid, denitrification and denitration are realized, other mixed gas is conveyed into the desulfurization chamber 12 through the gas communicating pipe 11, then the calcium oxide in the diffusion disc 22 reacts with water to generate calcium hydroxide in the desulfurization chamber 12, the desulfurization ring pipe 13 at the corresponding position and a plurality of air injection holes 14 on the diffusion disc 22 spray out the mixed gas containing sulfur dioxide gas, the mixed gas contacts with the calcium hydroxide and reacts to generate calcium sulfate which is insoluble in water, desulfurization is realized, meanwhile, when the gas is continuously conveyed through the conveying pipe 4, the gas flows and drives a plurality of turntables 27 to synchronously rotate, so that the rotating shaft 26 rotates, under the linkage effect of the bevel gear 28 and the first belt pulley 30, the speed reducing shaft 31 rotates, and under the effect of a transmission belt, the second belt is enabledThe wheel 32 drives two shower 19 synchronous rotation, to the inside rotatory spraying of denitration room 9 and desulfurization room 12, when improving waste gas utilization, promotes denitration reaction and desulfurization reaction, can also in time wash out the calcium sulfate sediment that generates, ensures the abundant contact of calcium hydrate and sulfur dioxide gas, improves desulfurization rate, has realized high-efficient desulfurization and denitration.
Through setting up the tray of round platform form for the calcium hydroxide solution that the reaction produced easily flows on round platform surface, simultaneously, sets up a plurality of spray grooves, has enlarged the area of contact of calcium hydroxide solution and sulfur dioxide gas, realizes abundant desulfurization reaction, further improves desulfurization effect, in addition, through setting up arc circle 24, avoids the water source entering denitration ring canal 10 that sprays through shower 19 and causes in desulfurization ring canal 13 to reflux.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The desulfurization and denitration system capable of realizing heat circulation and self energy supply comprises a denitration chamber (9) and a desulfurization chamber (12) for respectively removing nitrate and sulfur, and is characterized in that an air pump (1) for adsorbing waste gas and ozone is further arranged on one side of the denitration chamber (9), the output end of the air pump (1) is sequentially communicated with the denitration chamber (9) and the desulfurization chamber (12), synchronous rotation spray pipes (19) are further arranged in the denitration chamber (9) and the desulfurization chamber (12), a diffusion disc (22) for storing calcium oxide powder is further arranged in the desulfurization chamber (12), and the position of the spray pipes (19) corresponds to the position of the diffusion disc (22); a phase change heat storage material is arranged in the inner wall of the desulfurization chamber (12);
an intermittent assembly is further arranged between the air pump (1) and the denitration chamber (9), the intermittent assembly is used for mixing waste gas and ozone and intermittently discharging mixed reaction gas, the intermittent assembly comprises a deformable rubber air bag (6) and an elastic assembly which is arranged on the periphery of the rubber air bag (6) and used for promoting the reset of the rubber air bag (6), and the output end of the air pump (1) and the input end of the rubber air bag (6) are communicated with one conveying pipe (4);
the conveying pipe (4) is also provided with a linkage assembly for driving the spraying pipe (19) to rotate, the linkage assembly comprises a plurality of turntables (27) rotatably arranged in the conveying pipe (4), and the positions of the turntables (27) are matched with the flow direction of gas in the conveying pipe (4);
the two ends of the rubber air bag (6) are fixedly sleeved with hard pipes (7), one end of the conveying pipe (4) is fixedly communicated with the adjacent hard pipes (7) in a same conical pipe (5), one end of each conical pipe (5) positioned in each hard pipe (7) is conical, the other hard pipe (7) is communicated with a Z-shaped shrinkage pipe (8), the inner diameters of the two ends of the shrinkage pipe (8) are different, the inner diameter of the bottom end of each shrinkage pipe (8) connected with the rubber air bag (6) is larger than the top end of each shrinkage pipe (8) connected with the corresponding denitration chamber (9), the inner diameter of each shrinkage pipe is gradually reduced from the bottom end to the top end, and an electromagnetic valve (33) is arranged at the bottom end of each shrinkage pipe (8) connected with the corresponding rubber air bag (6);
the elastic assembly comprises two arc-shaped discs (17) which are positioned at the outer side of the rubber air bag (6) and are attached to the rubber air bag, a U-shaped table (15) is further installed on the periphery of the rubber air bag (6), a plurality of horizontal guide rods (16) with the same height are sleeved on two opposite sides of the U-shaped table (15) in a sliding mode, the two arc-shaped discs (17) are fixedly connected to one ends of the plurality of horizontal guide rods (16) on the corresponding side respectively, return springs (18) are sleeved on the two horizontal guide rods (16), and two ends of the return springs (18) are respectively abutted to the side wall of the U-shaped table (15) and the arc-shaped discs (17) on the corresponding side;
a rotating shaft (26) is rotatably arranged on the conveying pipe (4), the bottom end of the rotating shaft (26) extends into the conveying pipe (4), a plurality of turntables (27) are fixedly connected to the bottom end of the rotating shaft (26), a fixing seat (25) and an extension seat (29) are fixedly arranged on the U-shaped table (15), the top end of the rotating shaft (26) penetrates through the extension seat (29), a driving rod is rotatably arranged on the fixing seat (25), and bevel gears (28) meshed with each other are fixedly arranged at one end of the driving rod and one end of the rotating shaft (26);
the utility model discloses a denitration device, including fixing base (25) and denitration room (9), fixing base (25) with rotate on the outer wall of denitration room (9) and install same (31) reducing shaft, one end of reducing shaft (31) with the equal fixed mounting of the other end of actuating lever has first belt pulley (30) that the external diameter is different, denitration room (9) with the top of desulfurization room (12) all rotates the cover and is equipped with two high unanimous swivelling tube, the one end of swivelling tube of denitration room (9) upper end is the closed state, the other end of reducing shaft (31) with the equal fixed mounting of one end of closed state of swivelling tube has second belt pulley (32) that the external diameter is different, and the tensioning has a common first driving belt on two on first belt pulley (30), two the tensioning has a common second driving belt on second belt pulley (32).
2. The self-powered desulfurization and denitrification system capable of achieving thermal cycling according to claim 1, wherein an input end of the air pump (1) is communicated with an exhaust gas inlet end (2) and an ozone inlet end (3) which are arranged in parallel, the other end of the exhaust gas inlet end (2) is communicated with an external exhaust gas output end, and the other end of the ozone inlet end (3) is communicated with an external ozone output end.
3. The self-powered desulfurization and denitrification system of claim 1, wherein a denitrification ring pipe (10) is fixedly arranged on the inner wall of the denitrification chamber (9), and the top end of the shrinkage pipe (8) connected with the denitrification chamber (9) penetrates through the denitrification chamber (9) and is communicated with the denitrification ring pipe (10);
a desulfurization ring pipe (13) is fixedly arranged on the inner wall of the desulfurization chamber (12), the bottom end of the denitration chamber (9) is communicated with a gas communicating pipe (11), and the other end of the gas communicating pipe (11) penetrates through the desulfurization chamber (12) and is communicated with the desulfurization ring pipe (13);
the denitration ring pipe (10) with a plurality of evenly distributed air injection holes (14) are formed in the side wall of the desulfurization ring pipe (13), a supporting disc (34) is fixedly sleeved on the inner wall of the desulfurization chamber (12), a tray coaxial with the supporting disc is fixedly connected to the supporting disc (34), the diffusion disc (22) is installed at the top of the tray, a plurality of evenly distributed diffusion holes (23) are formed in the outer wall of the diffusion disc (22), and the air injection holes (14) in the desulfurization chamber (12) are consistent with the diffusion holes (23) in height.
4. A self-powered desulfurization and denitrification system according to claim 3, wherein the inner walls of the denitrification chamber (9) and the desulfurization chamber (12) are respectively sleeved with arc-shaped rings (24) respectively positioned on the denitrification ring pipe (10) and the desulfurization ring pipe (13), and the inner diameter of the arc-shaped rings (24) is larger than the inner diameters of the denitrification ring pipe (10) and the desulfurization ring pipe (13).
5. The self-powered desulfurization and denitrification system capable of achieving thermal cycling according to claim 3, wherein the tray is in a shape of a circular table, a plurality of spraying grooves with different widths are formed in the outer wall of the tray, and the positions of the spraying grooves are matched with the heights of the diffusion holes (23) in the desulfurization chamber (12).
6. The self-powered desulfurization and denitrification system according to claim 5, wherein the middle parts of the two rotating pipes are communicated with a same liquid communicating pipe (21), two ends of two spraying pipes (19) respectively positioned in the denitrification chamber (9) and the desulfurization chamber (12) are respectively communicated with one end of the corresponding rotating pipe, the other end of the rotating pipe at the upper end part of the desulfurization chamber (12) is communicated with an external water supply end, and a plurality of evenly distributed spray holes (20) are vertically and downwards formed in the two spraying pipes (19) along the axial straight line of the spraying pipes.
7. A method for desulfurizing and denitrating by self-energy capable of thermal cycle, which is applied to the desulfurizing and denitrating system capable of thermal cycle and self-energy according to any one of claims 1 to 6, and is characterized by comprising the following steps:
s1, denitration: the mixed gas of ozone and waste gas is sucked by the air pump (1) together and is conveyed into the rubber air bag (6) through the conveying pipe (4), the mixed gas entering the rubber air bag (6) is stored and fully reacted in the rubber air bag along with intermittent expansion and contraction of the rubber air bag (6), the reacted mixed gas is conveyed into the denitration chamber (9), and when the mixed gas is conveyed through the conveying pipe (4), the gas flows and drives the rotary tables (27) to synchronously rotate, so that the two spraying pipes (19) are driven to synchronously rotate into the denitration chamber (9) and the desulfurization chamber (12) to spray, the mixed gas reacts in the denitration chamber (9) to generate nitric acid, N element in the waste gas is removed, and denitration is realized;
s2, desulfurization: introducing the mixed gas after the reaction in the step S1 into a desulfurization chamber (12), releasing calcium oxide in a diffusion disc (22) and the mixed gas after the reaction in the step S1 released in the desulfurization chamber (12), and converting S element in waste gas into CaSO under the action of calcium hydroxide generated by the calcium oxide and water sprayed by a spray pipe (19) 4 Precipitation, realizing desulfurization, wherein heat released in the reaction process is stored by a phase change heat storage material in the desulfurization chamber (12) and used for releasing the stored heat to maintain the temperature condition required by the reaction in the desulfurization chamber (12) when the ambient temperature is lower than the reaction condition temperature in the desulfurization chamber (12);
s3, dedusting: and (2) introducing the mixed gas subjected to the desulfurization treatment in the step (S2) into a bag-type dust remover to remove dust and complete desulfurization, denitration and purification operation of waste gas.
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| CN117430302B (en) * | 2023-12-07 | 2024-04-23 | 邹平永和新型建材有限公司 | Red mud dealkalization system and process |
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| US6162409A (en) * | 1999-03-15 | 2000-12-19 | Arthur P. Skelley | Process for removing Nox and Sox from exhaust gas |
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| CN106975338A (en) * | 2017-05-17 | 2017-07-25 | 佛山瑞箭体育器材有限公司 | A kind of intelligent spray formula desulfurization and dust-removal method and its device |
| CN107875825B (en) * | 2017-12-28 | 2020-12-08 | 浙江致远环境科技有限公司 | Smoke and dust denitration sulphur removal environmental protection equipment |
| CN108744908A (en) * | 2018-07-02 | 2018-11-06 | 芜湖万向新元环保科技有限公司 | A kind of flue dust removes nitre sulphur removal environmental protection equipment |
| CN109675425B (en) * | 2018-12-06 | 2021-06-29 | 昆明理工大学 | System and method for integrated treatment and resource utilization of red mud for flue gas desulfurization and denitrification |
| CN211586372U (en) * | 2019-11-05 | 2020-09-29 | 贵州盘江煤层气开发利用有限责任公司 | Coal bed gas mixing device |
| CN113144853A (en) * | 2021-05-10 | 2021-07-23 | 河池市科学技术情报和创新服务所 | Flue gas denitration desulfurization system |
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