CN110180373B - Industrial purification system for removing sulfide gas - Google Patents
Industrial purification system for removing sulfide gas Download PDFInfo
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- CN110180373B CN110180373B CN201910475013.7A CN201910475013A CN110180373B CN 110180373 B CN110180373 B CN 110180373B CN 201910475013 A CN201910475013 A CN 201910475013A CN 110180373 B CN110180373 B CN 110180373B
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- inlet pipe
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- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000000746 purification Methods 0.000 title claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 114
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 74
- 239000002351 wastewater Substances 0.000 claims abstract description 12
- 239000002002 slurry Substances 0.000 claims description 139
- 239000007789 gas Substances 0.000 claims description 88
- 239000007788 liquid Substances 0.000 claims description 52
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 38
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 38
- 239000004571 lime Substances 0.000 claims description 38
- 239000011229 interlayer Substances 0.000 claims description 36
- 239000007921 spray Substances 0.000 claims description 31
- 239000010410 layer Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims 1
- 238000006477 desulfuration reaction Methods 0.000 abstract description 12
- 230000023556 desulfurization Effects 0.000 abstract description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 9
- 229910052717 sulfur Inorganic materials 0.000 description 9
- 239000011593 sulfur Substances 0.000 description 9
- 239000002699 waste material Substances 0.000 description 9
- 239000011440 grout Substances 0.000 description 6
- 230000005587 bubbling Effects 0.000 description 4
- 238000006386 neutralization reaction Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
Abstract
The invention discloses an industrial purification system for removing sulfide gas, which comprises a desulfurizing tower, a demisting device and a wastewater tank, wherein the desulfurizing tower comprises: the air inlet pipe is coaxially arranged in the desulfurizing tower body; the jet devices are of a funnel-shaped structure, are coaxially sleeved on the periphery of the air inlet pipe in sequence along the longitudinal direction, and are communicated with the air inlet pipe; the first spraying device is of a funnel-shaped structure and is arranged at the lower end of the spraying device in a fitting way; the second spraying device is of a funnel-shaped structure and is positioned at the upper end of the air outlet at intervals; the air outlet pipe is arranged on the side wall of the upper part of the desulfurizing tower body; the inlet end of the demisting device is communicated with the outlet end of the air outlet pipe; and the inlet end of the wastewater tank is communicated with the lower end of the desulfurizing tower body. The invention has the advantages of high removal rate, high desulfurization efficiency, stable output and the like, and is suitable for the treatment of sulfide gas in some large-scale and medium-scale power plants.
Description
Technical Field
The invention relates to the technical field of desulfurization equipment, in particular to an industrial purification system for removing sulfide gas.
Background
In recent years, many areas in China require factories to realize ultra-low emission, wherein the emission of sulfur dioxide is lower than 35mg/Nm 3 . At present, when sulfur substances in factory waste gas are treated, the factory waste gas is usually only introduced into a sulfur removing agent (strong alkaline liquid) and is discharged outside after being subjected to chemical reaction with the liquid, and under the conditions of higher operation and maintenance level of the factory and better maintenance of a dust remover, the sulfur content of sulfide gas is 30mg/Nm 3 -100mg/Nm 3 Meanwhile, the amount of sulfide gas is considerable, and the sulfide gas removal purification equipment is required to continuously and efficiently purify sulfide gas in an instant, so that the purified sulfide gas reaches the emission requirement of local emission marking, which is lower than the national emission standard, but the sulfur removal mode often cannot reach the emission requirement, and the sulfur substances in the treated waste gas still exceed the standard.
Among the prior art, the spray tower in the desulfurizing tower is one of the most widely used desulfurizing tower types, and the spray tower has the advantages of simple structure and mature and reliable process, and is widely applied to the treatment of low-sulfur sulfide gas in large-scale and medium-scale power plants, but the ultra-low emission of sulfur dioxide is difficult to realize only by means of single desulfurization of the spray tower, the desulfurizing efficiency is unsatisfactory, and secondary pollution is often brought when waste is recycled.
Disclosure of Invention
It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.
The invention also aims to provide an industrial purification system for removing sulfide gas, which has the advantages of simple structure, stable operation, low energy consumption, long service life and the like.
To achieve the objects and other advantages and in accordance with the purpose of the invention, there is provided an industrial purifying system for removing sulfide gas, comprising:
a desulfurizing tower, comprising:
the air inlet pipe is coaxially arranged in the desulfurizing tower body, the lower end of the air inlet pipe is communicated with a booster fan, and a first pulp inlet branch pipe is arranged in the air inlet pipe at intervals;
the jet flow device is of a funnel-shaped structure, a first interlayer is arranged in the jet flow device, a plurality of jet flow devices are coaxially sleeved on the periphery of the air inlet pipe at intervals, the first interlayer is communicated with the air inlet pipe, an air outlet hole is formed in the upper end face of the jet flow device, and the air outlet hole is communicated with the first interlayer;
the first spraying devices are of a funnel-shaped structure, the plurality of first spraying devices are coaxially sleeved on the periphery of the air inlet pipe at intervals, the first spraying devices are arranged at the lower end of the spraying devices in a fitting mode, the periphery of the first spraying devices are arranged with the inner peripheral wall of the desulfurizing tower in a fitting mode, and a second interlayer is arranged in the first spraying devices;
the second spraying devices are of a funnel-shaped structure, one second spraying device is arranged between every two adjacent first spraying devices, the second spraying devices are coaxially sleeved on the periphery of the air inlet pipe, the second spraying devices are distributed at the upper ends of the air outlet holes, the periphery of the second spraying devices are arranged at intervals with the inner peripheral wall of the desulfurizing tower body, and a third interlayer is arranged in the second spraying devices; and
the gas outlet pipe is arranged on the side wall of the upper part of the desulfurizing tower body, and the inlet end of the gas outlet pipe is positioned at the upper end of the first spraying device;
the inlet end of the demisting device is communicated with the outlet end of the air outlet pipe, and the outlet end of the demisting device is communicated with a chimney; and
the inlet end of the wastewater tank is communicated with a reflux port at the bottom of the desulfurizing tower body;
the jet flow device, the first spraying device and the second spraying device are provided with a plurality of slurry outlets at intervals at the joint of the lower end of the jet flow device and the periphery of the air inlet pipe, and the second interlayer and the third interlayer are respectively introduced with pressurized lime slurry through a slurry inlet pipe.
Preferably, the bottom of the desulfurizing tower body is provided with a funnel-shaped structure, a reflux port at the bottom of the desulfurizing tower body is communicated with the inlet end of a slurry outlet pipe, and the outlet end of the slurry outlet pipe is communicated with the wastewater tank; the upper end and the lower end of the air inlet pipe are respectively provided with a first spraying device, the top of the air inlet pipe is spaced below the top of the desulfurizing tower body, and the inlet end of the bottom of the air inlet pipe penetrates through the side wall of the bottom of the desulfurizing tower body from the inside and then is communicated with the booster fan arranged outside the desulfurizing tower body.
Preferably, the periphery of the jet flow device is attached to the inner peripheral wall of the desulfurizing tower body, an annular first slurry outlet is formed in the inner periphery of an opening at the bottom of the jet flow device, the first slurry outlet and the air inlet pipe are coaxially arranged, and the inner diameter of the first slurry outlet is larger than the outer diameter of the air inlet pipe; the inner periphery of the first slurry outlet is provided with a plurality of air guide pipes which are transversely and symmetrically distributed on the outer periphery of the air inlet pipe, the first end of each air guide pipe is communicated with the first interlayer, and the second end of each air guide pipe is communicated with the air inlet pipe; the air outlet hole is arranged on the upper end face of the jet flow device at the periphery of the upper end opening of the first slurry outlet.
Preferably, an annular second slurry outlet is formed in the inner periphery of the opening at the bottom of the first spraying device, the second slurry outlet and the air inlet pipe are coaxially arranged, and the inner diameter of the second slurry outlet is consistent with that of the first slurry outlet; the second grout outlet inner periphery sets up a plurality of reference columns, and a plurality of the reference column transverse symmetry is fixed the periphery of intake pipe, the reference column the size with the external dimension of air duct is unanimous, the reference column laminating sets up the air duct lower extreme.
Preferably, the outer periphery of the second spraying device is arranged at intervals with the inner peripheral wall of the desulfurizing tower body, an annular third slurry outlet is formed in the inner periphery of the opening at the bottom of the second spraying device, the third slurry outlet is coaxially arranged with the air inlet pipe, and the inner diameter of the third slurry outlet is consistent with that of the second slurry outlet.
Preferably, a second slurry inlet branch pipe is axially arranged on the outer wall of the desulfurizing tower body, a plurality of first liquid guide pipes are axially arranged on the pipe wall of the second slurry inlet branch pipe at intervals, the positions of the first liquid guide pipes are in one-to-one correspondence with the positions of the first spraying devices, the first ends of the first liquid guide pipes are communicated with the second slurry inlet branch pipe, and the second ends of the first liquid guide pipes are communicated with the second interlayer; the inlet end of the first slurry inlet branch pipe sequentially penetrates through the side wall at the bottom of the air inlet pipe and the side wall at the bottom of the desulfurizing tower body from the inside and then is led out outwards, and the leading-out end is communicated with the slurry inlet pipe after being converged with the inlet end at the bottom of the second slurry inlet branch pipe.
Preferably, a plurality of second liquid guide pipes are arranged at the inner periphery of the third slurry outlet, the second liquid guide pipes are transversely and symmetrically distributed at the outer periphery of the first slurry inlet branch pipe, a plurality of branch pipe holes are arranged on the wall of the air inlet pipe at intervals along the radial direction, the opening positions of the branch pipe holes are in one-to-one correspondence with the positions of the second liquid guide pipes, the first ends of the second liquid guide pipes are communicated with the third interlayer, and the second ends of the second liquid guide pipes penetrate through the branch pipe holes and are communicated with the first slurry inlet branch pipe.
Preferably, the top of the first pulp inlet branch pipe penetrates through the top end of the air inlet pipe from the inside and then is led out to a certain distance, the top of the leading-out end is positioned below the top of the first spraying device, and the top end of the first pulp inlet branch pipe is provided with the second spraying device.
Preferably, a water level sensor is installed on the inner peripheral wall of the first pulp outlet of the jet device arranged at the lower part of the air inlet pipe, the terminal of the water level sensor is connected with a controller, and the controller is connected with a pulp inlet pump on the pulp inlet pipe.
Preferably, the lower surface of the first spraying device is provided with a plurality of mounting holes in a direction perpendicular to the surface of the first spraying device, and the mounting holes cover the lower surface of the first spraying device; install the nozzle in the mounting hole, the nozzle with the second intermediate layer intercommunication, just the nozzle is followed with the direction perpendicular of first spray set lower surface sprays, first spray set and second spray set parallel interval set up.
The beneficial effects of the invention are as follows:
1. the invention has the advantages of simple and compact structure, high sulfur removal rate, high desulfurization efficiency, stable output, low energy consumption, long service life and the like, and is composed of a special desulfurizing tower, a demisting device, a waste water tank and the like, thereby being applicable to the treatment of sulfide gas in some large-scale and medium-scale power plants.
2. The invention adopts the air inlet structure of the multiple jet flow device, so that the air flow is fully crushed, the contact rate of sulfide gas and lime slurry is effectively improved, meanwhile, the gas and the liquid are gradually contacted, the absorption time is prolonged, and the removal rate of sulfur dioxide is greatly improved.
3. The invention adopts the second spraying device which is opposite to the spraying device in high pressure and the first spraying device which is attached to the lower end of the spraying device to perform preliminary desulfurization by utilizing the mutual impact of two high-speed gas-liquid flows, and then adopts the spraying technology to perform gas-liquid two-phase cross flow contact absorption neutralization reaction, so that under the condition of the same desulfurizing tower volume, the gas-liquid has larger contact area and longer contact time, thereby improving the removal rate and desulfurizing efficiency of sulfur dioxide.
4. According to the invention, the openings at the lower ends of the first spraying device and the spraying device are arranged at the periphery of the air inlet pipe at intervals, so that bubbling reaction occurs between gas and liquid when sulfide gas and lime slurry flow back at the openings, and the sulfur removal rate and the removal efficiency are further improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a side view of a desulfurizing tower of the present invention;
FIG. 2 is a longitudinal half sectional view of the desulfurizing tower of the present invention;
FIG. 3 is a schematic view of the jet device of the present invention;
FIG. 4 is a schematic view of the structure of the spray device of the present invention;
FIG. 5 is an enlarged view of the invention A;
FIG. 6 is a top view of the jet of the present invention;
FIG. 7 is a top view of a first spray device of the present invention;
fig. 8 is a top view of a second spray device of the present invention.
In the figure: 1. a desulfurizing tower body; 2. a booster fan; 3. an air inlet pipe; 4. a jet device; 5. a first spraying device; 6. a second spraying device; 7. a first slurry inlet branch pipe; 8. a second slurry inlet branch pipe; 9. an air outlet pipe; 10. a slurry outlet pipe; 11. a water level sensor; 12. a nozzle; 13. a mounting hole; 41. an air outlet hole; 42. a first slurry outlet; 43. an air duct; 44. a manifold hole; 51. a second slurry outlet; 52. positioning columns; 61. a third paddle outlet; 62. a second catheter.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Referring to fig. 2, the present invention provides a technical solution: an industrial purifying system for removing sulfide gas comprises a desulfurizing tower, a demisting device and a wastewater tank.
Specifically, the desulfurizing tower includes desulfurizing tower body 1, intake pipe 3, jet equipment 4, first spray set 5, second spray set 6 and outlet duct 9 etc. wherein, intake pipe 3 coaxial arrangement is in desulfurizing tower body 1, and jet equipment 4, first spray set 5 and the coaxial spacer sleeve of second spray set 6 are established in intake pipe 3 periphery, and jet equipment 4 and intake pipe 3 intercommunication, and outlet duct 9 sets up on the lateral wall on desulfurizing tower body 1 upper portion.
The bottom of the desulfurizing tower body 1 is provided with a funnel-shaped structure, a return port at the bottom of the desulfurizing tower body 1 is communicated with the inlet end of the slurry outlet pipe 10, and the outlet end of the slurry outlet pipe 10 is communicated with the wastewater tank.
The inlet end of the bottom of the air inlet pipe 3 extends outwards from the inside through the side wall of the bottom of the desulfurizing tower body 1, the extending end is communicated with a booster fan 2 arranged outside the desulfurizing tower body 1, the booster fan 2 pressurizes sulfide gas and then guides the sulfide gas into the air inlet pipe 3, then the sulfide gas flows upwards along the air inlet pipe 3, and the sulfide gas is sprayed out from a jet device 4 communicated with the air inlet pipe 3 and enters the inside of the desulfurizing tower body 1.
The outer wall of the desulfurizing tower body 1 is axially provided with a second slurry inlet branch pipe 8, and the second slurry inlet branch pipe 8 introduces pressurized lime slurry into the first spraying device 5; a first slurry inlet branch pipe 7 is arranged in the middle of the air inlet pipe 3, the first slurry inlet branch pipe 7 introduces pressurized lime slurry into the second spraying device 6, the inlet end of the first slurry inlet branch pipe 7 sequentially passes through the side wall at the bottom of the air inlet pipe 3 and the side wall at the bottom of the desulfurizing tower body 1 from the inside and then is led out outwards, and the outlet end is converged with the inlet end at the bottom of the second slurry inlet branch pipe 8 and then is communicated with the slurry inlet pipe.
The jet device 4 is of a funnel-shaped structure, the plurality of jet devices 4 are coaxially sleeved on the periphery of the air inlet pipe 3 at intervals, the periphery of the jet device 4 is attached to the inner peripheral wall of the desulfurizing tower body 1, a first interlayer is arranged in the jet device 4 and is communicated with the air inlet pipe 3, an air outlet hole 41 is arranged on the upper end face of the jet device 4, the air outlet hole 41 is communicated with the first interlayer, specifically, the air inlet pipe 3 guides pressurized sulfide gas into the first interlayer and then ejects the pressurized sulfide gas from the air outlet hole 41 into the desulfurizing tower body 1, the air inlet structure of the jet device 4 enables the air flow to be sufficiently crushed, the contact rate of the sulfide gas and lime slurry is effectively improved, and further, the plurality of jet devices 4 are coaxially arranged on the periphery of the air inlet pipe 3 at intervals, so that the sulfide gas is ejected outwards layer by layer, and therefore the reaction contact area of the sulfide gas in the desulfurizing tower body is further increased, and the contact time between gas and liquid is also prolonged. The aperture of the air outlet hole 41 is between 100um and 1mm, and the air outlet hole 41 is matched with the high pressure in the first interlayer, so that liquid accumulated on the upper end face of the jet device 4 is prevented from entering the first interlayer through the air outlet hole 41.
The first spraying device 5 is of a funnel-shaped structure, a plurality of first spraying devices 5 are coaxially sleeved on the periphery of the air inlet pipe 3 at intervals, the first spraying devices 5 are attached to the lower end of the spraying device 4, the periphery of the first spraying devices 5 are attached to the inner peripheral wall of the desulfurizing tower body 1, further, a second interlayer is arranged in the first spraying devices 5, and the second slurry inlet branch pipe 8 is communicated with the second interlayer.
Specifically, a plurality of first liquid guide pipes are axially arranged on the pipe wall of the second pulp inlet branch pipe 8 at intervals, the positions of the first liquid guide pipes correspond to the positions of the first spraying devices 5 one by one, the first ends of the first liquid guide pipes are communicated with the second pulp inlet branch pipe 8, and the second ends of the first liquid guide pipes are communicated with the second interlayer.
In this embodiment, the lower surface of the first spraying device 5 is provided with a plurality of mounting holes 13 in a direction perpendicular to the surface thereof, and the mounting holes 13 cover the lower surface of the first spraying device 5; the nozzle 12 is arranged in the mounting hole 13, the nozzle 12 is communicated with the second interlayer, the nozzle 12 sprays along the direction vertical to the lower surface of the first spraying device 5, and the first spraying device 5 and the second spraying device 6 are arranged at intervals in parallel. That is, the direction of the first spraying device 5 for spraying lime slurry is perpendicular to the path of the gas flowing under the first spraying device 5, so that the spraying liquid sprayed by the nozzle 12 and sulfide gas flowing under the first spraying device 5 obtain larger contact area under the condition of the same lower surface area of the first spraying device 5, thereby improving the removal rate of sulfur dioxide. Meanwhile, the mounting holes 13 cover the lower surface of the first spraying device 5, namely the nozzles 12 cover the lower surface of the first spraying device 5, so that the lime slurry sprayed in the first spraying device 5 covers the whole path through which sulfide gas flows, the contact rate of the gas and the lime slurry is improved, under the condition of matching the same desulfurizing tower volume, the structure of matching the first spraying device 5 and the jet device 4 in multiple layers is upwards arranged along the inner wall of the desulfurizing tower body 1, the contact efficiency and the contact distance of the gas and the lime slurry are finally effectively increased, and the reaction absorption efficiency of harmful gas is improved.
From the above, the sulfide gas entering from the bottom of the air inlet pipe 3 flows upwards through the jet device 4, enters the first interlayer and then is sprayed outwards from the air outlet 41, the second slurry inlet branch pipe 8 introduces the pressurized lime slurry into the second interlayer through the first liquid guide pipe, and then the lime slurry is sprayed downwards from the nozzle 12 on the lower surface of the first spraying device 5, namely, in the space between the first spraying device 5 and the jet device 4, the sulfide gas and the lime slurry are fully contacted and absorbed for neutralization reaction in a gas-liquid two-phase manner, so that the sulfide gas is absorbed through one spraying, the reaction residence time of the sulfide gas in the tower is prolonged, and the absorption rate of the sulfide gas is effectively improved.
The second spraying device 6 is of a funnel-shaped structure, the second spraying device 6 is arranged between every two adjacent first spraying devices 5, the second spraying devices 6 are coaxially sleeved on the periphery of the air inlet pipe 3, the second spraying devices 6 are distributed at the upper ends of the air outlet holes 41, the periphery of the second spraying devices 6 are arranged at intervals with the inner peripheral wall of the desulfurizing tower body 1, a third interlayer is arranged in the second spraying devices 6, and the first slurry inlet branch pipe 7 is communicated with the third interlayer.
Specifically, the first slurry inlet branch pipe 7 guides the pressurized lime slurry into the third interlayer, the high-pressure lime slurry sprayed in the second spray device 6 is parallel to sulfide gas sprayed uniformly from the spray device 4, high-pressure opposite impact occurs, two high-speed gas-liquid flows mutually impact to perform desulfurization, the removal rate of sulfur dioxide is greatly improved, sulfide gas upwards overflows from a gap between the second spray device 6 and the desulfurizing tower body 1 after being sprayed and absorbed for one time by the lime slurry below the second spray device 6, sulfide gas upwards overflows from a gap between the first spray device 5 and the desulfurizing tower body 1 after being sprayed and absorbed for two times by the lime slurry sprayed in the second spray device 4 and the air inlet pipe 3, and the sulfide gas upwards overflows from a layer after crossing the lime slurry layer sprayed in the upper layer of the second spray device 6, so on the same time, the sulfide gas is sprayed and absorbed for multiple times, the reaction path is long, the reaction residence time of the sulfide gas in the desulfurizing tower is increased, and the absorption rate of the sulfide gas is effectively improved.
In the embodiment, the upper end and the lower end of the air inlet pipe 3 are respectively provided with a first spraying device 5, and the top of the air inlet pipe 3 is positioned below the top of the desulfurizing tower body 1; the top of the first pulp inlet branch pipe 7 passes through the top end of the air inlet pipe 3 from the inside and then is led out for a certain distance, the top of the leading-out end is positioned below the top first spraying device 5, and the top end of the first pulp inlet branch pipe 7 is provided with a second spraying device 6; the back end of the air outlet pipe 9 is arranged on the side wall of the upper part of the desulfurizing tower body 1, and the inlet end of the air outlet pipe 9 is positioned above the top first spraying device 5.
Further, in order to make the waste liquid flow back, a plurality of slurry outlets are arranged at the connection parts of the lower ends of the jet device 4, the first spraying device 5 and the second spraying device 6 and the periphery of the air inlet pipe 3 at intervals.
Specifically, an annular first slurry outlet 42 is formed in the inner periphery of the opening at the bottom of the jet device 4, the first slurry outlet 42 and the air inlet pipe 3 are coaxially arranged, the inner diameter of the first slurry outlet 42 is larger than the outer diameter of the air inlet pipe 3, a plurality of air guide pipes 43 are arranged in the inner periphery of the first slurry outlet 42, the plurality of air guide pipes 43 are transversely and symmetrically distributed on the outer periphery of the air inlet pipe 3, the first end of each air guide pipe 43 is communicated with the first interlayer, and the second end of each air guide pipe 43 is communicated with the air inlet pipe 3.
The annular second grout outlet 51 is formed in the inner periphery of the opening at the bottom of the first spraying device 5, the second grout outlet 51 is coaxially arranged with the air inlet pipe 3, the inner diameter of the second grout outlet 51 is identical with that of the first grout outlet 42, a plurality of positioning columns 52 are arranged in the inner periphery of the second grout outlet 51, the positioning columns 52 are transversely and symmetrically fixed on the outer periphery of the air inlet pipe 3, the size of the positioning columns 52 is identical with the outer size of the air guide pipe 43, and the positioning columns 52 are attached to the lower end of the air guide pipe 43.
An annular third slurry outlet 61 is formed in the inner periphery of the opening at the bottom of the second spraying device 6, the third slurry outlet 61 is coaxially arranged with the air inlet pipe 3, the inner diameter of the third slurry outlet 61 is identical to that of the second slurry outlet 51, a plurality of second liquid guide pipes 62 are arranged in the inner periphery of the third slurry outlet 61, the second liquid guide pipes 62 are transversely and symmetrically distributed on the periphery of the first slurry inlet branch pipe 7, a plurality of branch pipe holes 44 are formed in the pipe wall of the air inlet pipe 3 at intervals in the radial direction, the opening positions of the branch pipe holes 44 are in one-to-one correspondence with the positions of the second liquid guide pipes 62, the first ends of the second liquid guide pipes 62 are communicated with the third interlayer, and the second ends of the second liquid guide pipes 62 penetrate through the branch pipe holes 44 and are communicated with the first slurry inlet branch pipe 7.
It can be seen from the above that, by setting the dimensions of the positioning column 52, the air duct 43, the second slurry outlet 51 and the first slurry outlet 42, the waste lime slurry can flow downwards from the slurry outlet to the greatest extent, so that the waste lime slurry caused by overlarge flow of the spraying device is prevented from being accumulated between the spraying device and the jet device 4, and meanwhile, the openings at the lower ends of the first spraying device 5 and the jet device 4 are arranged at the periphery of the air inlet pipe 3 at intervals, so that the sulfide gas and the lime slurry at the openings are opposite in flow, namely, the waste lime slurry flows from the second slurry outlet 51 to the first slurry outlet 42, and meanwhile, the sulfide gas flows from the first slurry outlet 42 to the second slurry outlet 51, so that bubbling reaction occurs between gas and liquid, the sulfide gas is further desulfurized, the sprayed lime slurry is effectively utilized, the utilization rate of the lime slurry is improved, meanwhile, the absorption rate and the removal efficiency of the sulfide gas are improved, and the cost is reduced.
In this embodiment, a water level sensor 11 is installed on the inner peripheral wall of the first outlet 42 of the jet device 4 at the lower part of the air inlet pipe 3, the terminal of the water level sensor 11 is connected with a controller, and the controller is connected with a pulp inlet pump on the pulp inlet pipe. Specifically, the water level sensor 11 measures the amount of the waste lime slurry which does not flow down in time in the slurry outlet, and then the controller is used for adjusting the slurry inlet pump, so that the output frequency of the liquid in the slurry inlet pipe is controlled, and the phenomenon that the waste lime slurry is accumulated on the upper surface of the jet device 4 in a large amount to cause blockage can be effectively prevented, so that sulfide gas cannot be normally sprayed out of the gas outlet hole 41. According to the invention, the balance of the slurry inlet flow of the slurry inlet pipe and the gas inlet flow of the booster fan 2 is realized by monitoring the liquid level of lime slurry accumulated above the jet device 4 at the lower part of the gas inlet pipe 3 and simultaneously controlling the slurry inlet flow of the slurry inlet pipe and the gas inlet flow of the booster fan 2, namely, the gas outlet flow of the jet device 4 and the jet flow of the spray device reach dynamic balance, so that the liquid level of lime slurry accumulated at the bottom of each layer of jet device 4 is maintained to be lower, and the fact that the lime slurry accumulated above the jet device 4 at the lower part of the gas inlet pipe 3 does not cause obstruction to the sulfide gas sprayed by the jet device 4 is ensured, and the gas can flow smoothly.
The inlet end of the demisting device is communicated with the outlet end of the air outlet pipe 9, the outlet end of the demisting device is communicated with a chimney, and the purified wet sulfide gas is discharged from the chimney after being dried by the demisting device.
The inlet end of the waste water tank is communicated with the reflux port at the bottom of the desulfurizing tower body 1, and the waste lime slurry is collected into the waste water tank to prevent secondary pollution.
In summary, the sulfide gas is pressurized by the booster fan 2 and then introduced into the air inlet pipe 3, then flows upward along the air inlet pipe 3, is ejected from the jet device 4 communicated with the air inlet pipe 2 and enters the interior of the desulfurizing tower body, the sulfide gas is uniformly ejected from the air outlet hole 41 of the bottommost jet device 4, forms high-pressure opposite flushing with lime slurry ejected from the bottommost second spray device 6 arranged at the upper end of the air outlet hole 41, performs a first gas-liquid reaction, then the sulfide gas overflows upward from a gap between the bottommost second spray device 6 and the inner wall of the desulfurizing tower body 1, at this time, the bottommost first spray device 5 ejects lime slurry along a direction perpendicular to the lower surface of the first spray device 5, performs gas-liquid two-phase cross flow contact absorption neutralization reaction with the sulfide gas, namely performs a second desulfurizing treatment on the sulfide gas, the sulfide gas passes through the second slurry outlet of the first spraying device 5 positioned at the bottommost upper layer and the first slurry outlet of the jet device 4 positioned at the bottommost upper layer in turn, and bubbling reaction is carried out with lime slurry flowing downwards in the slurry outlet, so that the sulfide gas completes the third desulfurization, the desulfurization structure of one layer is formed, when the sulfide gas subjected to three-step desulfurization treatment flows through the jet device 4 positioned at the bottommost upper layer, the sulfide gas reacts with the lime slurry sprayed out of the second spraying device 6 positioned at the bottommost upper layer along the longitudinal direction and is mixed with the sulfide gas sprayed out of the air outlet hole 41 positioned at the bottommost upper layer, the steps of multi-layer desulfurization reaction are repeated by pushing the slurry, finally the wet sulfide gas which is fully purified and reaches the discharge mark is introduced into the demister from the air outlet pipe 9 to be dried, and finally discharged from a chimney, and the waste lime slurry flows downwards layer by layer from the slurry outlet, and finally is guided into a waste water tank for recovery through a slurry outlet pipe 10.
The invention adopts the air inlet structure of the multiple jet device 4, so that the air flow is fully crushed, the contact rate of sulfide gas and lime slurry is effectively improved, meanwhile, the gas and the liquid are gradually contacted, the absorption time is prolonged, and the removal rate of sulfur dioxide is greatly improved; the invention adopts the two high-speed gas-liquid flow mutually impacted to perform preliminary desulfurization, and then adopts the spraying technology to perform gas-liquid two-phase cross flow contact absorption neutralization reaction, so that under the condition of the same desulfurizing tower volume, the gas-liquid has larger contact area and longer contact time, thereby improving the removal rate and desulfurizing efficiency of sulfur dioxide; according to the invention, the openings at the lower ends of the first spraying device 5 and the spraying device 4 are arranged at intervals on the periphery of the air inlet pipe, so that bubbling reaction occurs between gas and liquid when sulfide gas and lime slurry flow reversely at the openings, and the sulfur removal rate and the removal efficiency are further improved. In a word, the industrial purification system for removing sulfide gas has the advantages of high sulfur removal rate, high desulfurization efficiency, stable output, low energy consumption, long service life and the like, and is suitable for the treatment of sulfide gas in some large-scale and medium-scale power plants.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will recognize that: various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (8)
1. An industrial purification system for removing sulfide gas, comprising:
a desulfurizing tower, comprising:
the air inlet pipe (3) is coaxially arranged in the desulfurizing tower body (1), the lower end of the air inlet pipe (3) is communicated with a booster fan (2), and a first pulp inlet branch pipe (7) is arranged in the middle of the air inlet pipe (3);
the jet flow device (4) is of a funnel-shaped structure, a first interlayer is arranged in the jet flow device (4), a plurality of jet flow devices (4) are coaxially sleeved on the periphery of the air inlet pipe (3) at intervals, the first interlayer is communicated with the air inlet pipe (3), an air outlet hole (41) is formed in the upper end face of the jet flow device (4), and the air outlet hole (41) is communicated with the first interlayer;
the first spraying devices (5) are of a funnel-shaped structure, the plurality of first spraying devices (5) are coaxially sleeved on the periphery of the air inlet pipe (3) at intervals, the first spraying devices (5) are arranged at the lower end of the spraying device (4) in a fitting mode, the periphery of the first spraying devices (5) is arranged with the inner peripheral wall of the desulfurizing tower body (1) in a fitting mode, and a second interlayer is arranged in the first spraying devices (5);
the second spraying devices (6) are of a funnel-shaped structure, one second spraying device (6) is arranged between every two adjacent first spraying devices (5), the second spraying devices (6) are coaxially sleeved on the periphery of the air inlet pipe (3), the second spraying devices (6) are distributed at the upper ends of the air outlet holes (41), the periphery of the second spraying devices (6) and the inner peripheral wall of the desulfurizing tower body (1) are arranged at intervals, and a third interlayer is arranged in the second spraying devices (6); and
the gas outlet pipe (9) is arranged on the side wall of the upper part of the desulfurizing tower body (1), and the inlet end of the gas outlet pipe (9) is positioned at the upper end of the first spraying device (5);
the inlet end of the demisting device is communicated with the outlet end of the air outlet pipe (9), and the outlet end of the demisting device is communicated with a chimney; and
the inlet end of the wastewater tank is communicated with a reflux port at the bottom of the desulfurizing tower body (1);
the jet flow device (4), the first spraying device (5) and the second spraying device (6) are provided with a plurality of slurry outlets at intervals at the joint of the lower end of the jet flow device and the periphery of the air inlet pipe (3), and each of the second interlayer and the third interlayer is used for introducing pressurized lime slurry through a slurry inlet pipe;
the top of the first pulp inlet branch pipe (7) penetrates through the top end of the air inlet pipe (3) from the inside and then is led out to a certain distance, the top of the leading-out end is positioned below the first spraying device (5) at the top, and the top end of the first pulp inlet branch pipe (7) is provided with a second spraying device (6); the lower surface of the first spraying device (5) is provided with a plurality of mounting holes (13) in a direction perpendicular to the surface of the first spraying device, and the mounting holes (13) cover the lower surface of the first spraying device (5); install nozzle (12) in mounting hole (13), nozzle (12) with second intermediate layer intercommunication, just nozzle (12) follow with direction perpendicular to first spray set (5) lower surface sprays, first spray set (5) and second spray set (6) parallel interval setting.
2. Industrial purification system for the removal of sulphide gases according to claim 1, wherein the bottom of the desulfurizing tower body (1) is arranged in a funnel-shaped structure, the return opening at the bottom of the desulfurizing tower body (1) is communicated with the inlet end of a pulp outlet pipe (10), and the outlet end of the pulp outlet pipe (10) is communicated with the wastewater tank; the upper end and the lower end of the air inlet pipe (3) are respectively provided with a first spraying device (5), the top interval of the air inlet pipe (3) is positioned below the top of the desulfurizing tower body (1), and the inlet end at the bottom of the air inlet pipe (3) penetrates through the side wall of the bottom of the desulfurizing tower body (1) from the inside and then is communicated with the booster fan (2) arranged outside the desulfurizing tower body (1).
3. The industrial purification system for removing sulfide gas according to claim 2, wherein the periphery of the jet flow device (4) is attached to the inner peripheral wall of the desulfurizing tower body (1), an annular first slurry outlet (42) is formed in the inner periphery of the opening at the bottom of the jet flow device (4), the first slurry outlet (42) is coaxially arranged with the air inlet pipe (3), and the inner diameter of the first slurry outlet (42) is larger than the outer diameter of the air inlet pipe (3); the inner periphery of the first slurry outlet (42) is provided with a plurality of air guide pipes (43), the air guide pipes (43) are transversely and symmetrically distributed on the outer periphery of the air inlet pipe (3), the first end of each air guide pipe (43) is communicated with the first interlayer, and the second end of each air guide pipe (43) is communicated with the air inlet pipe (3); the air outlet hole (41) is arranged on the upper end face of the jet flow device (4) at the periphery of the upper end opening of the first slurry outlet (42).
4. An industrial purifying system for removing sulfide gas according to claim 3, wherein an annular second slurry outlet (51) is formed in the inner periphery of the bottom opening of the first spraying device (5), the second slurry outlet (51) is coaxially arranged with the air inlet pipe (3), and the inner diameter of the second slurry outlet (51) is consistent with the inner diameter of the first slurry outlet (42); the inner periphery of the second slurry outlet (51) is provided with a plurality of positioning columns (52), the positioning columns (52) are transversely and symmetrically fixed on the periphery of the air inlet pipe (3), the size of the positioning columns (52) is consistent with the outer size of the air guide pipe (43), and the positioning columns (52) are attached to the lower end of the air guide pipe (43).
5. The industrial purifying system for removing sulfide gas according to claim 4, wherein the outer periphery of the second spraying device (6) is spaced from the inner peripheral wall of the desulfurizing tower body (1), an annular third slurry outlet (61) is formed in the inner periphery of the opening at the bottom of the second spraying device (6), the third slurry outlet (61) is coaxially arranged with the air inlet pipe (3), and the inner diameter of the third slurry outlet (61) is identical to the inner diameter of the second slurry outlet (51).
6. The industrial purification system for removing sulfide gas according to claim 5, wherein a second slurry inlet branch pipe (8) is axially arranged on the outer wall of the desulfurizing tower body (1), a plurality of first liquid guide pipes are axially arranged on the pipe wall of the second slurry inlet branch pipe (8) at intervals, the positions of the first liquid guide pipes are in one-to-one correspondence with the positions of the first spraying devices (5), the first ends of the first liquid guide pipes are communicated with the second slurry inlet branch pipe (8), and the second ends of the first liquid guide pipes are communicated with the second interlayer; the inlet end of the first slurry inlet branch pipe (7) sequentially penetrates through the side wall of the bottom of the air inlet pipe (3) and the side wall of the bottom of the desulfurizing tower body (1) from the inside to be led out outwards, and the leading-out end is communicated with the slurry inlet pipe after being converged with the inlet end of the bottom of the second slurry inlet branch pipe (8).
7. The industrial purifying system for removing sulfide gas according to claim 6, wherein a plurality of second liquid guiding pipes (62) are arranged at the inner periphery of the third slurry outlet (61), the second liquid guiding pipes (62) are transversely and symmetrically distributed at the outer periphery of the first slurry inlet branch pipe (7), a plurality of branch pipe holes (44) are radially arranged on the pipe wall of the air inlet pipe (3) at intervals, the opening positions of the branch pipe holes (44) are in one-to-one correspondence with the positions of the second liquid guiding pipes (62), the first ends of the second liquid guiding pipes (62) are communicated with the third interlayer, and the second ends of the second liquid guiding pipes (62) penetrate through the branch pipe holes (44) to be communicated with the first slurry inlet branch pipe (7).
8. An industrial cleaning system for removing sulphide gases according to claim 3, wherein a water level sensor (11) is mounted on the inner peripheral wall of the first outlet opening (42) of the jet device (4) arranged at the lower part of the inlet pipe (3), and the terminal of the water level sensor (11) is connected with a controller, and the controller is connected with a pulp inlet pump on the pulp inlet pipe.
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