CN109647163B - Ammonia process and semi-dry process desulfurization device for dry-process cement kiln - Google Patents
Ammonia process and semi-dry process desulfurization device for dry-process cement kiln Download PDFInfo
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- CN109647163B CN109647163B CN201811575063.4A CN201811575063A CN109647163B CN 109647163 B CN109647163 B CN 109647163B CN 201811575063 A CN201811575063 A CN 201811575063A CN 109647163 B CN109647163 B CN 109647163B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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Abstract
The invention discloses an ammonia process and semi-dry process desulfurization device for a dry-process cement kiln, and particularly relates to a device for fully adsorbing sulfur-containing substances in tail gas during cement production, which aims to solve the problem that part of unstable ammonium sulfate and ammonium bisulfite liquid in the prior art is volatilized and discharged to the air together with the tail gas to cause air pollution. The concrete technical scheme does, relative ammonia tank one side is fixed with the adsorption tank on the mounting bracket, the pipe is discharged fume in adsorption tank upper portion intercommunication, connecting rod one end is cup jointed to bent axle middle part bend, the connecting rod other end rotates the connection piston, the inner wall of piston edge sealing sliding connection ammonia tank, the ammonia tank is pressed close to mounting bracket one side and is passed through another check valve intercommunication atomizer, the atomizer is located the inside top of adsorption tank, the first bevel gear of bent axle lower extreme fixed connection, first bevel gear meshing second bevel gear, second bevel gear fixes at the worm tip, worm lower part meshing worm wheel, the worm wheel below is provided with the fan, the fan is fixed on the mounting bracket, fan transmission worm wheel.
Description
Technical Field
The invention relates to auxiliary equipment for cement production, in particular to an ammonia process and semi-dry process desulfurization device for a dry process cement kiln.
Background
Cement is the most common and important raw material in building materials, a dry-process cement kiln is often adopted for production in cement production, and sulfur elements in a novel dry-process cement kiln production system mainly come from fuels and raw materials. SO generated by burning fuel in decomposing furnace and kiln head2The flue gas flows through a preheater and is in contact reaction with raw meal powder in the preheater so as to achieve the effect of desulfurization; the sulfur contained in the raw material is decomposed in the upper preheater to generate SO2Except for part of SO2In addition to introducing a raw mill for drying the feedstock to achieve desulfurization, most of the SO2And the flue gas is discharged out of the system from the kiln tail.
Most of sulfur treatment in tail gas in the existing cement production equipment is absorbed through ammonia water, and a small amount of oxygen contained in the tail gas contacts generated ammonium sulfite and ammonium bisulfite liquid to generate stable ammonium sulfate and ammonium bisulfate, but the oxygen content in the tail gas is very low, so that the ammonium sulfite and ammonium bisulfite liquid can not be ensured to be fully converted into the ammonium sulfate and ammonium bisulfate, and part of unstable ammonium sulfate and ammonium bisulfite liquid can volatilize and is discharged to the air together with the tail gas, thereby causing air pollution.
Disclosure of Invention
Based on the defects in the prior art mentioned in the background art, the invention provides the ammonia-process semi-dry-process desulfurization device for the dry-process cement kiln.
The invention overcomes the technical problems by adopting the following technical scheme, and specifically comprises the following steps:
an ammonia process and semi-dry process desulfurization device for a dry-process cement kiln comprises a mounting frame, an ammonia water tank, an atomizing nozzle and a solid material box; an ammonia tank is fixed on the side edge of the upper portion of the mounting frame, an ammonia tank is arranged on the lower portion of the ammonia tank and fixed on the mounting frame, the ammonia tank and the ammonia tank are located on the same side of the mounting frame, a driving motor is fixed on a flange on the upper portion of one side, away from the mounting frame, of the ammonia tank, the output end of the driving motor is rotatably connected with a crankshaft, and the crankshaft is arranged inside the ammonia tank; an adsorption tank is fixed on one side, opposite to the ammonia water tank, of the mounting frame, the upper portion of the adsorption tank is communicated with a smoke exhaust pipe, one end of a connecting rod is sleeved at the bent position in the middle of the crankshaft, the other end of the connecting rod is rotatably connected with a piston, the edge of the piston is connected with the inner wall of the ammonia water tank in a sealing and sliding mode, the upper portion of the ammonia water tank is connected with the bottom of the ammonia water tank through an ammonia supply pipe, and a one-way valve is installed at the position, located at the bottom of the ammonia water tank, of the ammonia supply pipe; the ammonia water case is pressed close to mounting bracket one side and is passed through another check valve intercommunication atomizer, and atomizer is located the inside top of adsorption tank.
As a further scheme of the invention: the adsorption box is characterized in that a solid material box is fixed on one side, away from the mounting frame, of the lower portion of the outer portion of the adsorption box, a filter plate is fixed in the middle of the adsorption box, and a through hole is formed in one side, close to the solid material box, of the adsorption box.
As a still further scheme of the invention: the adsorption box is characterized in that a liquid discharge pipe is fixed to the bottom of the adsorption box and communicated with the adsorption box, a rotary valve is arranged at the middle position outside the liquid discharge pipe, a sealing cover is in threaded connection with the bottom of the solid material box, and a flue gas outlet is formed in the upper portion of the solid material box.
As a still further scheme of the invention: the lower end of the crankshaft is fixedly connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, the second bevel gear is fixed at the end part of a worm, and the worm is rotationally connected to the bottom of the ammonia water tank; the worm lower part meshes the worm wheel, and the worm wheel passes through the support rotation to be connected in the bottom of ammonia water tank, and the worm wheel below is provided with the fan, and the fan is fixed on the mounting bracket, and the fan transmission worm wheel, the outside atmosphere is connected to the fan input, and the bottom of solid workbin and adsorption tank is connected respectively to its output.
As a still further scheme of the invention: a plurality of filter holes are evenly formed in the filter plate, and the filter plate is arranged in an inclined mode.
As a still further scheme of the invention: the upper part of the ammonia water tank is fixed and communicated with a material injection pipe, and the upper part of the ammonia water tank is fixed and communicated with a material injection pipe.
As a still further scheme of the invention: the driving motor is connected with the power supply and the switch through wires.
As a still further scheme of the invention: the fan is connected with the worm wheel through a synchronous belt.
After adopting the structure, compared with the prior art, the invention has the following advantages: the device drives bent axle and worm wheel rotation respectively through driving motor, and the bent axle drives piston reciprocating motion and supplies the ammonia, and the worm wheel drives the fan and rotates and carry out the air feed, guarantees the unstable ammonium sulfite of production and ammonium bisulfite liquid and the oxygen contact in the air fully generates stable ammonium sulfate and ammonium bisulfate, and the sulfur containing is harmful in the greatly reduced cement production tail gas, improves emission standard, is favorable to environmental protection.
Drawings
FIG. 1 is a schematic structural diagram of an ammonia-process semi-dry desulfurization device of a dry cement kiln.
FIG. 2 is a left side view of a fan and a worm gear in the dry cement kiln ammonia process and semi-dry process desulfurization device.
FIG. 3 is a schematic structural diagram of a filter plate in the ammonia process and semi-dry process desulfurization device of the dry cement kiln.
In the figure: 1-a mounting frame; 2-ammonia tank; 3-material injection pipe; 4-ammonia water tank; 5-an adsorption tank; 6, a smoke exhaust pipe; 7-driving a motor; 8-a crankshaft; 9-a connecting rod; 10-a piston; 11-an ammonia supply pipe; 12-a one-way valve; 13-an atomizer; 14-a filter plate; 15-material fixing box; 16-a first bevel gear; 17-a second bevel gear; 18-a worm; 19-a worm gear; 20-synchronous belt; 21-a fan; 22-an oxygen supply tube; 23-flue gas outlet.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Example 1
Referring to fig. 1 to 3, in the embodiment of the invention, an ammonia-process semi-dry-process desulfurization device for a dry-process cement kiln comprises a mounting frame 1, an ammonia water tank 4, an atomizing nozzle 13 and a solid material tank 15; an ammonia water tank 2 is fixed on the side edge of the upper part of the mounting frame 1, specifically, a feeding pipe 3 is fixed and communicated on the upper part of the ammonia water tank 2, an ammonia water tank 4 is arranged on the lower part of the ammonia water tank 2, the ammonia water tank 4 is fixed on the mounting frame 1, it should be noted that the ammonia water tank 4 and the ammonia water tank 2 are positioned at the same side position of the mounting frame 1, and a large amount of ammonia water is filled in the ammonia water tank 2 for adsorbing sulfur elements in the dry-process cement kiln production system; the upper portion flange that 1 one side of mounting bracket was kept away from to ammonia tank 4 is fixed with driving motor 7, and driving motor 7 output rotates and connects bent axle 8, and bent axle 8 sets up inside ammonia tank 4, and 8 both ends of bent axle pass ammonia tank 4 respectively and rotate with its bearing and be connected, more closely one step, driving motor 7 wire connection power and switch make driving motor 7 switch-on power behind the starting switch, drive bent axle 8 by its output and rotate.
Relative ammonia tank 4 one side is fixed with adsorption tank 5 on mounting bracket 1, adsorption tank 5 upper portion intercommunication discharge fume 6, 8 middle part bends of bent axle cup joint connecting rod 9 one end, the connecting rod 9 other end rotates connects piston 10, the inner wall of piston 10 edge seal sliding connection ammonia tank 4, 4 upper portions of ammonia tank are through supplying the bottom that ammonia pipe 11 connects ammonia tank 2, wherein, supply ammonia pipe 11 to be located 2 bottoms of ammonia tank and install check valve 12, this check valve 12 only allows the aqueous ammonia to flow into ammonia tank 4 through ammonia tank 2 and can not allow the aqueous ammonia into ammonia tank 4Flows back to the ammonia water tank 2 from the ammonia water tank 4, and the rotating crankshaft 8 drives a piston 10 to slide back and forth along the inside of the ammonia water tank 4 through a connecting rod 9; ammonia tank 4 is pressed close to 1 one side of mounting bracket and is passed through another check valve 12 intercommunication atomizer 13, atomizer 13 is located the inside top of adsorption tank 5, reciprocal piston 10 that moves along ammonia tank 4 drives the aqueous ammonia in ammonia tank 4 and passes through atomizer 13 and spout to adsorption tank 5 in, concrete process does, when piston 10 removes to being close to 1 direction of mounting bracket, the aqueous ammonia pressure increase in aqueous ammonia tank 4, the aqueous ammonia can only carry out the pressure release through atomizer 13 blowout this moment, the aqueous ammonia of 13 spun through atomizer is vaporific and follows the sulphur flue gas contact that contains among the flue gas 6 discharge into adsorption tank 5 of discharge fume and react and generate ammonium bisulfite and ammonium sulfite, concrete chemical reaction formula is 3NH3+2SO2+2H2O→NH4HSO3+(NH4)2SO3When the piston 10 moves away from the mounting frame 1, the pressure in the ammonia water tank 4 is reduced, and the ammonia water in the ammonia water tank 2 enters the ammonia water tank 4 through the ammonia supply pipe 11 under atmospheric pressure to supplement ammonia liquid.
A solid material box 15 is fixed on one side, far away from the mounting frame 1, of the lower portion of the outer portion of the adsorption box 5, a filter plate 14 is fixed in the middle of the adsorption box 5, a plurality of filter holes are uniformly formed in the filter plate 14, the filter plate 14 is obliquely arranged, a through hole is formed in one side, close to the solid material box 15, of the filter plate 14, colorless crystalline ammonium sulfite and tawny ammonium bisulfite liquid generated in the adsorption box 5 are separated under the action of the filter plate 14, wherein the crystallized ammonium sulfite cannot pass through the filter holes in the filter plate 14 and then enter the solid material box 15 through the through hole, and the liquid ammonium bisulfite enters the bottom of the adsorption box 5 through the filter holes to realize a separation function; adsorption tank 5 fixed bottom and the intercommunication have the bleeder line, the outside intermediate position of bleeder line is provided with the rotary valve, 15 bottom threaded connection of solid workbin has the closing cap, and flue gas outlet 23 has been seted up to solid workbin 15 top, wherein, a small amount of oxygen that contains respectively with ammonium sulfite and ammonium bisulfite liquid contact generate stable ammonium sulfate and ammonium bisulfate in the flue gas, can discharge the ammonium sulfate through opening the closing cap after the flue gas treatment finishes, rotate the ammonium bisulfate that the rotary valve will adsorb 5 bottoms of case and emit, reduce the sulphur content in the flue gas that cement manufacture produced.
Example 2
In order to further explain the ammonia process and semi-dry process desulfurization device for the dry cement kiln, the application provides another embodiment, and the ammonia process and semi-dry process desulfurization device for the dry cement kiln in the embodiment has the following technical characteristics: the lower end of the crankshaft 8 is fixedly connected with a first bevel gear 16, the first bevel gear 16 is meshed with a second bevel gear 17, the second bevel gear 17 is fixed at the end part of a worm 18, the worm 18 is rotationally connected to the bottom of the ammonia water tank 4, and the rotating crankshaft 8 drives the worm 18 to rotate through a bevel gear set while realizing ammonia supply; worm 18 lower part meshing worm wheel 19, worm wheel 19 passes through the support rotation and connects the bottom at ammonia water tank 4, worm wheel 19 below is provided with fan 21, fan 21 fixes on mounting bracket 1, specifically, be connected through hold-in range 20 between fan 21 and the worm wheel 19, external atmosphere is connected to fan 21 input, the bottom of solid workbin 15 and adsorption tank 5 is connected respectively to its output, pivoted worm 18 drives worm wheel 19 and rotates, worm wheel 19 drives fan 21 through hold-in range 20 and rotates to solid workbin 15 and adsorption tank 5 bottom air feed, increase the supply volume of oxygen, make solid workbin 15 and adsorption tank 5 bottom ammonium sulfite and ammonium bisulfite liquid abundant contact generate stable ammonium sulfate and ammonium bisulfate, concrete chemical reaction formula is (NH 20 (NH) and (NH) ammonium bisulfite liquid full contact generate4)2SO3+1/2O2→(NH4)2SO4And NH4HSO3+1/2O2→NH4HSO4The function of supplying ammonia and air feed is realized simultaneously through a motor, guarantees that the proportion of supplying ammonia and oxygen suppliment corresponds all the time, has overcome traditional equipment and need measure the supply volume of aqueous ammonia respectively and the supply volume of air again and control respectively through the flowmeter, the not high problem of precision.
From the above detailed description of the embodiments, it is easy to understand that the working principle of the present invention is: the ammonia tank 2 is filled with a large amount of ammonia water for adsorbing sulfur elements in the dry-process cement kiln production system, the driving motor 7 is powered on after the starting switch is started, the output end of the driving motor drives the crankshaft 8 to rotate, the rotating crankshaft 8 drives the piston 10 to slide along the inside of the ammonia tank 4 in a reciprocating manner through the connecting rod 9, and the piston 10 moving along the ammonia tank 4 in a reciprocating manner drives the ammonia water in the ammonia tank 4 to be sprayed to the dry-process cement kiln production system through the atomizing nozzle 13In the adsorption tank 5, the concrete process is that when the piston 10 moves towards the direction close to the mounting rack 1, the ammonia water pressure in the ammonia water tank 4 is increased, at the moment, the ammonia water can be only sprayed out through the atomizer 13 for pressure relief, the ammonia water sprayed out through the atomizer 13 is in a foggy shape and contacts and reacts with sulfur-containing flue gas discharged into the adsorption tank 5 from the smoke discharge pipe 6 to generate ammonium bisulfite and ammonium sulfite, and the concrete chemical reaction formula is 3NH3+2SO2+2H2O→NH4HSO3+(NH4)2SO3When the piston 10 moves away from the mounting frame 1, the pressure in the ammonia water tank 4 is reduced, ammonia water in the ammonia water tank 2 enters the ammonia water tank 4 through the ammonia supply pipe 11 under atmospheric pressure to supplement ammonia liquid, colorless crystalline ammonium sulfite and tawny ammonium bisulfite liquid generated in the adsorption tank 5 are separated under the action of the filter plate 14, wherein the crystalline ammonium sulfite cannot enter the solid material tank 15 through a filter hole on the filter plate 14, the liquid ammonium bisulfite enters the bottom of the adsorption tank 5 through the filter hole to realize the separation function, a small amount of oxygen contained in the flue gas is respectively contacted with the ammonium sulfite and the ammonium bisulfite liquid to generate stable ammonium sulfate and ammonium bisulfate, the ammonium sulfate can be discharged by opening the sealing cover after the flue gas is treated, the ammonium bisulfate at the bottom of the adsorption tank 5 is discharged by rotating the rotary valve, and the sulfur content in the flue gas generated by cement manufacturing is reduced, the rotating crankshaft 8 drives the worm 18 to rotate through the bevel gear set while realizing ammonia supply, the rotating worm 18 drives the worm wheel 19 to rotate, the worm wheel 19 drives the fan 21 to rotate through the synchronous belt 20 to supply air to the bottoms of the solid material box 15 and the adsorption box 5, the supply amount of oxygen is increased, ammonium sulfite and ammonium bisulfite liquid at the bottoms of the solid material box 15 and the adsorption box 5 are in full contact to generate stable ammonium sulfate and ammonium bisulfate, and the specific chemical reaction formula is (NH)4)2SO3+1/2O2→(NH4)2SO4And NH4HSO3+1/2O2→NH4HSO4The function of supplying ammonia and air is realized through a motor simultaneously, the proportion of guaranteeing to supply ammonia and oxygen suppliment corresponds all the time, has overcome traditional equipment and need measure the supply volume of aqueous ammonia and the supply volume of air respectively through the flowmeter and control respectively again, the not high problem of precision。
It needs to be explained, check valve and driving motor are prior art's application in this application, utilize driving motor to drive bent axle and worm wheel rotation respectively, the bent axle drives piston reciprocating motion and supplies the ammonia, and the worm wheel drives the fan and rotates and carry out the air feed, the unstable ammonium sulfite of assurance production and ammonium bisulfite liquid fully generate stable ammonium sulfate and ammonium bisulfate with the oxygen contact in the air, the harmful substance that contains sulphur in the greatly reduced cement production tail gas, improve emission standard, be favorable to environmental protection for the innovation point of this application, it has effectively solved the relative more of the sulphur material in the current cement production tail gas, air pollution's problem.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. But all changes which come within the scope of the invention are intended to be embraced therein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Claims (7)
1. An ammonia process and semi-dry process desulfurization device for a dry-process cement kiln comprises a mounting frame (1), an ammonia water tank (4), an atomizing nozzle (13) and a solid material box (15); an ammonia water tank (2) is fixed to the side edge of the upper portion of the mounting frame (1), an ammonia water tank (4) is arranged on the lower portion of the ammonia water tank (2), and the ammonia water tank (4) is fixed to the mounting frame (1), and is characterized in that the ammonia water tank (4) and the ammonia water tank (2) are located on the same side of the mounting frame (1), a driving motor (7) is fixed to an upper flange of one side, away from the mounting frame (1), of the ammonia water tank (4), the output end of the driving motor (7) is rotatably connected with a crankshaft (8), and the crankshaft (8) is arranged inside the ammonia water tank (4); an adsorption tank (5) is fixed on one side, opposite to the ammonia water tank (4), of the mounting rack (1), the upper portion of the adsorption tank (5) is communicated with a smoke exhaust pipe (6), one end of a connecting rod (9) is sleeved at the bent portion of the middle of a crankshaft (8), the other end of the connecting rod (9) is rotatably connected with a piston (10), the edge of the piston (10) is connected with the inner wall of the ammonia water tank (4) in a sealing and sliding mode, the upper portion of the ammonia water tank (4) is connected with the bottom of the ammonia water tank (2) through an ammonia supply pipe (11), a one-way valve (12) is installed at the position, located at the bottom of the ammonia water tank (2), of the ammonia supply pipe (11), the lower end of the crankshaft (8) is fixedly connected with a first bevel gear (16), the first bevel gear (16) is meshed with a second bevel gear (17), the second bevel gear (17) is fixed at the end of a worm (18), and the worm (18) is rotatably connected to the bottom of the ammonia water tank (4); the lower part of the worm (18) is meshed with a worm wheel (19), the worm wheel (19) is rotatably connected to the bottom of the ammonia water tank (4) through a support, a fan (21) is arranged below the worm wheel (19), the fan (21) is fixed on the mounting frame (1), the fan (21) drives the worm wheel (19), the input end of the fan (21) is connected with the outside atmosphere, and the output end of the fan is respectively connected with the bottoms of the solid material tank (15) and the adsorption tank (5); ammonia water tank (4) are pressed close to mounting bracket (1) one side and are passed through another check valve (12) intercommunication atomizer (13), and atomizer (13) are located adsorption tank (5) inside top.
2. The ammonia process and semi-dry process desulfurization device for the dry cement kiln according to the claim 1, characterized in that a solid material box (15) is fixed on one side of the outer lower part of the adsorption box (5) far away from the mounting frame (1), a filter plate (14) is fixed in the middle of the adsorption box (5), and one side of the adsorption box near the solid material box (15) is provided with a through hole.
3. The ammonia-process and semi-dry-process desulfurization device for the dry cement kiln as recited in claim 2, characterized in that the bottom of the adsorption box (5) is fixed and communicated with a liquid discharge pipe, a rotary valve is arranged at the middle position outside the liquid discharge pipe, the bottom of the solid material box (15) is in threaded connection with a sealing cover, and a flue gas outlet (23) is arranged above the solid material box (15).
4. The dry cement kiln ammonia process and semi-dry process desulfurization device according to claim 2, wherein the filter plate (14) is provided with a plurality of filter holes uniformly, and the filter plate (14) is arranged in an inclined manner.
5. The dry cement kiln ammonia process and semi-dry process desulfurization device according to claim 1, characterized in that the upper part of the ammonia tank (2) is fixed and communicated with the feeding pipe (3), and the upper part of the ammonia tank (2) is fixed and communicated with the feeding pipe (3).
6. The dry cement kiln ammonia process and semi-dry process desulfurization device according to claim 1, characterized in that the driving motor (7) is connected with a power supply and a switch through wires.
7. The dry cement kiln ammonia process and semi-dry process desulfurization device according to claim 1, characterized in that the fan (21) is connected with the worm wheel (19) through a synchronous belt (20).
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| CN101579602A (en) * | 2009-06-12 | 2009-11-18 | 山西晋丰环保工程设计有限公司 | Energy-saving and high-quality ammonia desulphurization process for ammonia sulfate recovery |
| CN207464825U (en) * | 2017-10-11 | 2018-06-08 | 南通理工学院 | Quick preparation device of lathe cutting fluid for machine-building |
| CN107604861A (en) * | 2017-10-24 | 2018-01-19 | 浙江辰基建设有限公司 | A kind of town road guardrail cleaning plant |
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