CN110180372B - Tail gas purification device of sectional type processing - Google Patents
Tail gas purification device of sectional type processing Download PDFInfo
- Publication number
- CN110180372B CN110180372B CN201910430062.9A CN201910430062A CN110180372B CN 110180372 B CN110180372 B CN 110180372B CN 201910430062 A CN201910430062 A CN 201910430062A CN 110180372 B CN110180372 B CN 110180372B
- Authority
- CN
- China
- Prior art keywords
- pipe
- spraying
- desulfurizing tower
- interlayer
- air inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000746 purification Methods 0.000 title description 3
- 238000012545 processing Methods 0.000 title description 2
- 238000005507 spraying Methods 0.000 claims abstract description 105
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 67
- 239000007921 spray Substances 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002351 wastewater Substances 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims description 117
- 239000011229 interlayer Substances 0.000 claims description 71
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 69
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 69
- 239000004571 lime Substances 0.000 claims description 69
- 239000010410 layer Substances 0.000 claims description 68
- 238000007789 sealing Methods 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 abstract description 17
- 230000023556 desulfurization Effects 0.000 abstract description 17
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 24
- 239000007788 liquid Substances 0.000 description 22
- 238000010521 absorption reaction Methods 0.000 description 19
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 9
- 229910052717 sulfur Inorganic materials 0.000 description 9
- 239000011593 sulfur Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation 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
- 238000005192 partition Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 125000000101 thioether group Chemical group 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 a tail gas purifying device for sectional treatment, which comprises a desulfurizing tower, a demisting device and a wastewater tank, wherein the desulfurizing tower comprises an air inlet pipe which is a double-layer type straight pipe, the air inlet pipe is coaxially arranged in the desulfurizing tower body, the side wall of the lower end of the air inlet pipe is communicated with a booster fan for introducing sulfide gas, and a plurality of spray holes are uniformly formed in the inner pipe wall of the air inlet pipe; the inlet end of the spray device is arranged at the top of the desulfurizing tower body, the spray device spirally surrounds between the periphery of the air inlet pipe and the inner periphery of the desulfurizing tower body, and the spray devices are longitudinally spirally arranged at intervals so as to form a spray layer between two adjacent layers of spray devices; the water pump is arranged in the spraying layer, and the output end of the water pump is communicated with the air inlet pipe; and the air outlet pipe is arranged on the outer side wall of the bottom of the desulfurizing tower body, and the inlet end of the air outlet pipe is communicated with the outlet end of the spraying layer. The invention has high desulfurization rate and high desulfurization efficiency, and is suitable for the treatment of sulfide gas in large-scale and medium-scale power plants.
Description
Technical Field
The invention relates to the technical field of desulfurization equipment, in particular to a tail gas purifying device for sectional treatment.
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 . Under the conditions of higher operation and maintenance level of the factory and better maintenance of the dust remover, the sulfur content of the sulfide gas is 30mg/Nm 3 -100mg/Nm 3 The sulfide gas amount is considerable, and the sulfide gas removal purification equipment is required to continuously and efficiently purify the sulfide gas in an instant, so that the purified sulfide gas reaches the emission requirement of local emission marking and is lower than the national emission standard.
The desulfurizing tower has the main function of removing sulfur dioxide in sulfide gas, the spray tower is one of the most widely used desulfurizing towers, has the advantages of simple structure and mature and reliable process, is widely applied to the treatment of low-sulfur sulfide gas in large-scale and medium-scale power plants, but is difficult to realize ultralow emission of sulfur dioxide by only single desulfurization of the spray tower, has unsatisfactory desulfurization efficiency, and often causes secondary pollution 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 a tail gas purifying device for sectional treatment, which has the advantages of simple structure, stable operation, low energy consumption, long service life and the like.
In order to achieve the objects and other advantages of the present invention, there is provided an exhaust gas purifying apparatus for a sectional type treatment, comprising:
a desulfurizing tower, comprising:
the gas inlet pipe is a double-layer type straight pipe, the gas inlet pipe is coaxially arranged in the desulfurizing tower body, the side wall of the lower end of the gas inlet pipe is communicated with a booster fan for introducing sulfide gas, the lower end of the gas inlet pipe is communicated with a slurry outlet pipe, and a plurality of spray holes are uniformly formed in the inner pipe wall of the gas inlet pipe;
the inlet end of the spray device is arranged at the top of the desulfurizing tower body, the spray device spirally surrounds between the periphery of the air inlet pipe and the inner periphery of the desulfurizing tower body, and the spray devices are longitudinally spirally arranged at intervals so that a spray layer is formed between two adjacent layers of spray devices;
the water pump is arranged in the spraying layer, the output end of the water pump is communicated with the air inlet pipe, and the water pump pumps lime slurry accumulated in the spraying layer into an interlayer of the air inlet pipe; and
the gas outlet pipe is arranged on the outer side wall of the bottom of the desulfurizing tower body, and the inlet end of the gas outlet pipe is communicated with the outlet end of the spraying layer;
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
and the inlet end of the wastewater tank is communicated with the outlet end of the slurry outlet pipe.
Preferably, the air inlet pipe comprises an inner pipe, an outer pipe and a slurry outlet with a funnel-shaped structure, wherein the inner pipe is coaxially arranged in the outer pipe at intervals, an annular baffle is arranged between the periphery of an opening at the upper end of the inner pipe and the periphery of an opening at the upper end of the outer pipe in a fitting way, and the tops of the inner pipe and the outer pipe are fixed in a sealing way through clamping the annular baffle; the upper end of the slurry outlet is connected with the lower end of the inner pipeline, the outer diameter of the opening of the lower end of the slurry outlet is smaller than the inner diameter of the outlet at the bottom of the desulfurizing tower body, the lower end of the slurry outlet is led out outwards from the outlet at the bottom of the desulfurizing tower body, and the leading-out end extends downwards and is embedded in the slurry outlet pipe at coaxial intervals.
Preferably, an air inlet is formed in the side wall of the slurry outlet, the output end of the booster fan penetrates through the tower body of the desulfurizing tower from the outside and then is connected and fixed to the air inlet, and the booster fan pressurizes the sulfide gas and then guides the sulfide gas into the inner pipeline from the air inlet.
Preferably, the spraying device comprises a spraying interlayer which is spirally wound on the periphery of the air inlet pipe and a plurality of nozzles which are arranged on the lower surface of the spraying interlayer, wherein the nozzles are communicated with the spraying interlayer, the longitudinal spiral interval of the spraying interlayer is arranged to enable two adjacent layers to form a spraying layer between the spraying interlayers, the inlet end of the spraying interlayer is connected with a slurry inlet pipe arranged on the outer wall of the desulfurizing tower body, and lime slurry is led into the spraying interlayer by the slurry inlet pipe.
Preferably, a plurality of first baffles are arranged on the outer pipe wall of the air inlet pipe in an axially protruding mode, the first baffles are fixed on the upper surface of each spraying interlayer, and the height of each first baffle is smaller than that of each spraying layer.
Preferably, the water pump is installed and fixed at the bottom of the spraying interlayer at the front end of the first baffle, a plurality of through holes are formed in the pipe wall of the outer pipe at intervals along the axial direction, the through holes are communicated with the interlayer between the inner pipe and the outer pipe, the positions of the through holes are in one-to-one correspondence with the positions of the water pump, the output end of the water pump is correspondingly connected to the through holes, and the water pump pumps lime slurry into the interlayer of the air inlet pipe through the through holes.
Preferably, the inner pipeline pipe wall is uniformly provided with a plurality of spraying holes, a plurality of second baffles are transversely attached and clamped between the inner pipeline outer pipe wall and the outer pipeline inner pipe wall, and the second baffles are axially positioned between two adjacent through holes.
Preferably, a plurality of mounting holes are formed in the lower surface of the spraying interlayer in a direction perpendicular to the lower surface of the spraying interlayer, the mounting holes are communicated with the spraying interlayer, and the mounting holes cover the width direction of the spraying interlayer; the spray nozzles are installed in the installation holes, and the spray nozzles spray downwards along the direction perpendicular to the lower surface of the spraying interlayer.
Preferably, a water level sensor is installed on the front end face of the first baffle, the terminal of the water level sensor is connected with a controller, and the controller is connected with the water pump.
Preferably, the bottom of the desulfurizing tower is arranged to be of a funnel-shaped structure, the bottom outlet of the desulfurizing tower is communicated with the slurry outlet pipe, the bottom outlet of the desulfurizing tower is positioned at the lower end of the air inlet, the position between the bottom outlet of the desulfurizing tower and the slurry outlet pipe is communicated with the air inlet, and the slurry outlet pipe is filled with the back-flowing lime slurry, and the lime slurry in the bottom of the desulfurizing tower and the lime slurry in the inner pipeline are led into the wastewater tank together after being collected in the slurry outlet pipe.
The beneficial effects of the invention are as follows:
1. the invention has the advantages of simple and compact structure, high 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.
2. The special desulfurizing tower adopts a structure that the spraying device is spirally wound on the inner peripheral wall of the desulfurizing tower, so that the spraying device is designed to be longer under the condition of the same volume of the desulfurizing tower, thereby increasing the contact area between gas and liquid, prolonging the contact time between gas and liquid and greatly improving the removal rate of sulfur dioxide.
3. According to the invention, the lime slurry accumulated in the spray layer is pumped into the air inlet pipe by adding the water pump, so that the lime slurry carries out primary spray desulfurization on sulfide gas entering the desulfurization tower, thereby increasing the internal circulation of the desulfurization tower, and further improving the removal rate and desulfurization efficiency of sulfur dioxide.
4. The spray nozzle of the spray device adopts a spray mode along the direction vertical to the lower surface of the spray interlayer, so that a larger contact area is formed between gas and liquid, and the removal rate of sulfur dioxide is 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 schematic structural view of the desulfurizing tower of the present invention;
FIG. 3 is a schematic view of the structure of the air inlet pipe of the present invention;
FIG. 4 is a transverse cross-sectional view of an air inlet tube of the present invention;
FIG. 5 is an enlarged view of the invention A;
fig. 6 is an enlarged view of the present invention B.
In the figure: 1. a booster fan; 2. an air inlet pipe; 3. a slurry inlet pipe; 4. a spraying device; 5. spraying a layer; 6. a water pump; 7. an air outlet pipe; 8. a slurry outlet pipe; 9. a first baffle; 10. a water level sensor; 21. an inner pipe; 22. an outer pipe; 23. an air inlet; 24. a slurry outlet; 25. a through hole; 26. spraying holes; 27. an annular baffle; 28. a second baffle; 41. spraying an interlayer; 42. a nozzle; 43. and (5) mounting holes.
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: a tail gas purifying device for sectional treatment comprises a desulfurizing tower, a demisting device and a wastewater tank.
Specifically, the desulfurizing tower includes: the desulfurization tower comprises an air inlet pipe 2, a spraying device 4, a water pump 6, an air outlet pipe 7 and the like, wherein the air inlet pipe 2 is coaxially arranged in the desulfurization tower body, the spraying device 4 surrounds the periphery of the air inlet pipe 2, the water pump 6 is arranged between two adjacent layers of spraying devices 4 and is communicated with an interlayer of the air inlet pipe 2, and the air outlet pipe 7 is arranged on the outer side wall of the bottom of the desulfurization tower body.
The air inlet pipe 2 is a double-layer type straight pipeline, the air inlet pipe 2 comprises an inner pipeline 21, an outer pipeline 22 and a slurry outlet 24 which is of a funnel-shaped structure, wherein the outer diameter of the inner pipeline 21 is smaller than the inner diameter of the outer pipeline 22, the inner pipeline 21 is embedded in the outer pipeline 22 at intervals coaxially, an annular baffle 27 is clamped between the periphery of an opening at the upper end of the inner pipeline 21 and the periphery of an opening at the upper end of the outer pipeline 22, and the annular baffle 27 is clamped between the inner pipeline 21 and the outer pipeline 22 in a fitting manner to seal and fix the inner pipeline and the outer pipeline 22.
The lower end of the air inlet pipe 2 is communicated with a slurry outlet pipe 8, in the embodiment, the upper end of a slurry outlet 24 is connected with the lower end of an inner pipeline 21, the outer diameter of an opening at the lower end of the slurry outlet 24 is smaller than the inner diameter of an outlet at the bottom of a desulfurizing tower body, the lower end of the slurry outlet 24 is led out from the outlet at the bottom of the desulfurizing tower body, and the leading-out end extends downwards and is embedded in the slurry outlet pipe 8 at coaxial intervals;
the lower end side wall of the air inlet pipe 2 is communicated with a booster fan 1 for introducing sulfide gas, specifically, the side wall of the slurry outlet 24 is provided with an air inlet 23, the output end of the booster fan 1 passes through the tower body of the desulfurizing tower from the outside and then is connected and fixed to the air inlet 23, the booster fan 1 pressurizes the sulfide gas and then introduces the sulfide gas into the inner pipeline 21 from the air inlet 23, then the sulfide gas flows upwards along the inner pipeline 21 and overflows from the upper end opening of the air inlet pipe 2 to enter the inside of the desulfurizing tower body.
The spray device 4 is spirally wound between the periphery of the air inlet pipe 2 and the inner periphery of the tower body of the desulfurizing tower, the inlet end of the spray device 4 is arranged at the top of the tower body of the desulfurizing tower, specifically, the spray device 4 comprises a spray interlayer 41 spirally wound on the periphery of the air inlet pipe 2 and a plurality of nozzles 42 arranged on the lower surface of the spray interlayer 41, the nozzles 42 are communicated with the spray interlayer 41, the spray interlayer 41 is longitudinally spirally arranged at intervals to form a spray layer 5 between two adjacent layers of the spray interlayer 41, the inlet end of the spray interlayer 41 is connected with a pulp inlet pipe 3 arranged on the outer wall of the desulfurizing tower body, the pulp inlet pipe 3 guides pressurized lime slurry into the spray interlayer 41, the spray layer 5 is spirally downwards arranged, the top of the spray layer 5 is communicated with the upper end opening of the air inlet pipe 2, sulfide gas entering from the bottom of the air inlet pipe 2 flows upwards through the upper end of the spray layer 5 after being absorbed by primary spraying of the lime slurry in the air inlet pipe 2, then flows downwards through the spray layer 5, the bottom outlet end of the spray layer 5 is communicated with the inlet end of the air outlet pipe 7, the sulfide gas is absorbed by secondary lime slurry in the spray layer 5, and the secondary absorption time of the sulfide gas is prolonged, and the sulfide gas is absorbed by the secondary absorption reaction path of the secondary sulfide gas in the air outlet pipe, so that the absorption rate of the sulfide gas is prolonged, and the sulfide absorption time is prolonged.
When the slurry feeding pipe 3 is started to feed slurry, lime slurry flows into the spray interlayer 41 from the slurry feeding pipe 3 in a pressurized manner, then the lime slurry is sprayed into the spray layer 5 by the nozzle 42, the lime slurry sprayed in the spray layer 5 covers the spiral downward path of the whole spray layer 5, the contact rate of gas in the spray layer 5 and the lime slurry is improved, the sprayed lime slurry and sulfide gas flowing through the spray layer 5 are subjected to gas-liquid two-phase full contact absorption neutralization reaction, and the special desulfurizing tower adopts a structure that the spray device 4 is spirally wound on the inner peripheral wall of the desulfurizing tower, so that the path design of the spray device 4 is longer under the condition of the same desulfurizing tower volume, the contact area between gas and liquid is increased, the contact time between gas and liquid is prolonged, and the removal rate of sulfur dioxide is greatly improved.
A plurality of mounting holes 43 are formed in the lower surface of the spray interlayer 41 in a direction perpendicular to the lower surface of the spray interlayer 41, the mounting holes 43 are communicated with the spray interlayer 41, and the mounting holes 43 cover the width direction of the spray interlayer 41; the nozzle 42 is installed in the mounting hole 43, so that the nozzle 42 is communicated with the spraying interlayer 41, the nozzle 42 sprays along the direction vertical to the lower surface of the spraying interlayer 41, that is to say, the moving path of the gas in the spraying layer 5 is vertical to the spraying direction of lime slurry, and the design ensures that the nozzle 42 sprays the spraying liquid and sulfide gas flowing under the spraying liquid to obtain a larger contact area under the condition of the same length of the spraying device 4, thereby improving the removal rate of sulfur dioxide. Meanwhile, the mounting holes 43 cover the width direction of the spraying interlayer 41, namely the nozzles 42 cover the width direction of the spraying interlayer 41, so that the lime slurry sprayed in the spraying layer 5 covers the whole spiral downward path of the spraying layer 5, the contact rate of gas in the spraying layer 5 with the lime slurry is improved, the spiral downward path of the spraying layer 5 which is longer under the same volume is matched, 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.
A plurality of first baffles 9 are arranged on the outer pipe wall of the air inlet pipe 2 along the axial protrusion, each first baffle 9 is positioned on the same straight line, specifically, two sides of each first baffle 9 are clamped between the outer pipe wall of the air inlet pipe 2 and the inner peripheral wall of the desulfurizing tower body in a sealing way, and the first baffles 9 are fixed on the upper surface of each spraying interlayer 41 so as to prevent lime slurry accumulated on each spraying interlayer 41 from directly flowing to the next spraying interlayer 41. The height of the first baffle plate 9 is smaller than that of the spraying layer 5, in this embodiment, a first baffle plate 9 is disposed along each rotation of the spraying interlayer 41, and a gap between the upper end of the first baffle plate 9 and the lower surface of the spraying interlayer 41 can allow gas to flow therethrough without blocking the normal flow of the gas, and meanwhile, the first baffle plate 9 intercepts lime slurry flowing downwards in the spraying layer 5, so that lime slurry sprayed from each spraying layer 5 is accumulated at the front end position of the first baffle plate 9 at the bottom of the layer.
The spraying layer 5 is provided with a plurality of water pumps 6, the output ends of the water pumps 6 are communicated with the air inlet pipe 2, the water pumps 6 pump lime slurry accumulated in the spraying layer 5 into an interlayer of the air inlet pipe 2, specifically, the water pumps 6 are fixedly arranged at the bottom of a spraying interlayer 41 at the front end of the first baffle plate 9, namely, the lime slurry accumulating position in each layer of the spraying layer 5, a plurality of through holes 25 are axially formed in the pipe wall of the outer pipe 22 at intervals, the through holes 25 are positioned at the front end of a path of the first baffle plate 9, the through holes 25 are communicated with the interlayer between the inner pipe 21 and the outer pipe 22, the forming positions of the through holes 25 are in one-to-one correspondence with the positions of the water pumps 6, the output ends of the water pumps 6 are correspondingly connected to the through holes 25, and the water pumps 6 pump the lime slurry accumulated at the bottom of each layer of the spraying layer 5 into the interlayer of the air inlet pipe 2 through the through holes 25.
The pipe wall of the inner pipeline 21 is uniformly provided with a plurality of spraying holes 26, the spraying holes 26 are communicated with the interlayer of the air inlet pipe 2, lime slurry pumped into the interlayer of the air inlet pipe 2 by the water pump 6 can be sprayed out from the spraying holes 26 and enter the inner pipeline 21, so that the lime slurry and sulfide gas which is pressurized by the booster fan 1 and then is introduced into the inner pipeline 21 are subjected to a first-stage neutralization reaction, the internal circulation of the desulfurizing tower is increased, and the reaction efficiency and the removal rate are greatly improved.
Furthermore, a plurality of second baffles 28 are transversely attached and clamped between the outer pipe wall of the inner pipe 21 and the inner pipe wall of the outer pipe 22, namely, a plurality of second baffles 28 are transversely clamped in the interlayer of the air inlet pipe 2, the second baffles 28 are axially positioned between two adjacent through holes 25, the interlayer of the air inlet pipe 2 is axially and equally spaced and divided into a plurality of independent chambers, the baffles 28 pump each water pump 6 into the interlayer of the air inlet pipe 2 to isolate lime slurry, the pressure in each independent chamber is increased, the lime slurry can be smoothly sprayed out from the spraying holes 26 and is sprayed into the inner pipe 21 to be in contact with air inlet reaction, primary absorption reaction is realized, the air is subjected to primary spraying absorption reaction in the air inlet upward process in the air inlet pipe 2, then is screwed in the spraying layer 5 from top to bottom to be subjected to secondary spraying absorption reaction, the primary and secondary step-by step and gradual absorption process are carried out, the absorption reaction path of the air is obviously increased under the desulfurizing tower with the same volume, and the absorption reaction path of the air is further improved.
The second baffle 28 also has the beneficial effect of making secondary rational use of lime slurries of different use concentrations: if the initial sulfur content of the sulfide gas is 80mg/Nm 3 When the purity of the lime slurry introduced into the shower interlayer 41 by the slurry inlet pipe 3 is 100%, the sulfur content after the neutralization reaction of the sulfide gas flowing through the inner pipe 21 and the lime slurry sprayed from the shower holes 26 in the first stage is 50mg/Nm 3 Sulfide gas overflows from the upper end opening of the air inlet pipe 2 and enters the spraying layer 5, namely, the second stage of sulfide gas is carried out by the spraying device 4The sulfur content of the sulfide gas after passing through the first shower layer 5 was 45mg/Nm 3 Whereas the purity of the lime slurry accumulated before the first baffle 9 of this layer was 50%, the sulfur content of the sulfide gas after passing through the second shower layer 5 was 40mg/Nm 3 The purity of the lime slurry accumulated in front of the first baffle 9 is 60%, and so on, it can be known that when the first water pumps 6 pump the lime slurry into each interlayer in the air inlet pipe 2, the purity of the lime slurry gradually decreases from bottom to top, that is, the concentration of the lime slurry sprayed into the inner pipe 21 from the interlayer in the air inlet pipe 2 gradually decreases from bottom to top, and in the first stage, when the sulfur content of the sulfide gas is high, the purity of the lime slurry sprayed onto the sulfide gas is relatively high, so that the utilization rate of the lime slurry is higher, and the removal rate and removal efficiency of sulfur dioxide are further improved.
Therefore, as the innovation point of the device, the spraying concentration in the inward pipeline 21 is stepwise distributed, the sulfur content in the gas just entering the inward pipeline 21 is higher, the sulfur content in the gas is gradually reduced in the primary spraying absorption process from bottom to top in the inward pipeline 21, therefore, in the design of the device, the concentration of the lime slurry of the primary spraying is gradually reduced from bottom to top through the design of the first baffle 9, the water pump 6 and the second baffle 28, namely, the high-concentration sulfide gas is reacted and absorbed by the high-concentration lime slurry, the concentration of the gas is reduced along with the upward flowing of the gas, in the process, the low-concentration gas is reacted and absorbed by the low-concentration lime slurry, the sulfur content in the gas is obviously reduced after the primary spraying absorption process of the partition and the partial concentration absorption process, and is sequentially and secondarily sprayed and absorbed in the spraying layer 5, the original lime slurry in the primary spraying layer 5, the gas after the primary absorption process sequentially passes through each layer in the spiral space of the spraying layer 5, the concentration of the gas is gradually reduced until the concentration of the lime slurry is gradually reduced from the bottom to the corresponding layer 21, the concentration of the lime slurry is gradually increased, the absorption rate of the lime slurry is not increased, and the absorption rate of the lime slurry is gradually increased, and the concentration of the lime slurry is not absorbed in the bottom of the spraying tower, and the absorption rate is gradually increased, and the concentration of the lime slurry is gradually increased.
In the above technical scheme, the front end face of the first baffle plate 9 is provided with the water level sensor 10, the terminal end of the water level sensor 10 is connected with the controller, and the controller is connected with the water pump 6. The water level sensor 10 detects the amount of lime slurry intercepted by the baffle plate 9, and then the output frequency of the water pump 6 is regulated by the controller, so that the phenomenon that the lime slurry overflows from the upper part of the baffle plate 9 due to excessive lime slurry can be prevented. According to the invention, the balance of the slurry inlet flow of the slurry inlet pipe 3 and the pumping flow of the water pump 6 is realized by monitoring the liquid level height of lime slurry accumulated at the bottom of each spraying layer 5 and controlling the slurry inlet flow of the slurry inlet pipe 3 and the pumping flow of the water pump 6, namely, the slurry inlet flow of the slurry inlet pipe 3 and the pumping flow of the water pump 6 are consistent, so that the liquid level height of lime slurry accumulated at the bottom of each spraying layer 5 is maintained stable, the lime slurry accumulated at the bottom of each spraying layer 5 is ensured not to overflow to the next layer, and the smooth flow of gas among the spraying layers 5 is maintained.
The bottom of desulfurizing tower sets up into funnel structure, the bottom export of desulfurizing tower and play thick liquid pipe 8 intercommunication, the bottom export of desulfurizing tower is located air inlet 23 lower extreme, and the bottom export of desulfurizing tower and play thick liquid pipe 8 that goes out between thick liquid pipe 8 and the air inlet 23 of the position that goes out thick liquid pipe 8 intercommunication are filled with the lime thick liquid that flows back from interior pipeline 21, play the liquid level and seal the effect, prevent directly flowing out from thick liquid pipe 8 from the inlet air of interior pipeline 21 bottom, the back flow lime thick liquid in desulfurizing tower bottom and the interior pipeline 21 is together introduced into the waste water tank after converging in play thick liquid pipe 8.
The inlet end of the demisting device is communicated with the outlet end of the air outlet pipe 7, the outlet end of the demisting device is communicated with a chimney, the inlet end of the wastewater tank is communicated with the outlet end of the slurry outlet pipe 8, namely wet sulfide gas which is fully purified and reaches discharge labels is introduced into the demisting device from the air outlet pipe 7 for drying treatment, finally discharged from the chimney, and waste lime slurry in the slurry outlet pipe 8 is introduced into the wastewater tank for treatment, so that secondary pollution is prevented.
In summary, the sulfide gas is pressurized by the booster fan 1 and then is led into the air inlet pipe 2, the water pump 6 pumps the lime slurry in the spray layer 5 into the interlayer of the air inlet pipe 2, the lime slurry is sprayed out from the spray holes 26 and reacts with the sulfide gas in the first stage, then the sulfide gas overflows from the upper end opening of the air inlet pipe 2 and enters the spray layer 5, the sulfide gas starts to perform the desulfurization reaction in the second stage by the spray device 4, finally the wet sulfide gas which is sufficiently purified and reaches the discharge mark is led into the demister by the air outlet pipe 7 for drying treatment, and finally is discharged from the chimney, and the waste lime slurry is recovered by the waste water tank to avoid secondary pollution. The special desulfurizing tower adopts the structure that the spraying device 4 is spirally wound on the inner peripheral wall of the desulfurizing tower, so that the spraying device 4 is designed to be longer under the condition of the same desulfurizing tower volume, thereby increasing the contact area between gas and liquid, prolonging the contact time between gas and liquid and greatly improving the removal rate of sulfur dioxide; according to the invention, the lime slurry accumulated in the jet layer 5 is pumped into the air inlet pipe 2 by adding the water pump 6, so that the lime slurry carries out primary spray desulfurization on sulfide gas entering the desulfurizing tower, thereby increasing the internal circulation of the desulfurizing tower, and further improving the removal rate and the desulfurizing efficiency of sulfur dioxide; the spray nozzle 42 of the spray device 4 adopts a spray mode along the direction vertical to the lower surface of the spray interlayer 41, so that a larger contact area is formed between gas and liquid, and the removal rate of sulfur dioxide is improved. In a word, the tail gas purifying device for the sectional treatment has the advantages of high desulfurization rate, high desulfurization efficiency, stable output, low energy consumption and long service life, and is suitable for treating sulfide gas in 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 (5)
1. An exhaust gas purifying apparatus for sectional treatment, comprising:
a desulfurizing tower, comprising:
the gas inlet pipe (2) is a double-layer type straight pipe, the gas inlet pipe (2) is coaxially arranged in the desulfurizing tower body, the side wall of the lower end of the gas inlet pipe (2) is communicated with a booster fan (1) for introducing sulfide gas, the lower end of the gas inlet pipe (2) is communicated with a slurry outlet pipe (8), and a plurality of spraying holes (26) are uniformly formed in the inner pipe wall of the gas inlet pipe (2);
the inlet end of the spraying device (4) is arranged at the top of the desulfurizing tower body, the spraying device (4) spirally surrounds between the periphery of the air inlet pipe (2) and the inner periphery of the desulfurizing tower body, and the spraying devices (4) are longitudinally spirally arranged at intervals so that a spraying layer (5) is formed between two adjacent layers of the spraying devices (4);
the water pump (6) is arranged in the spraying layer (5), the output end of the water pump (6) is communicated with the air inlet pipe (2), and the water pump (6) pumps lime slurry accumulated in the spraying layer (5) into an interlayer of the air inlet pipe (2); and
the air outlet pipe (7) is arranged on the outer side wall of the bottom of the desulfurizing tower body, and the inlet end of the air outlet pipe (7) is communicated with the outlet end of the spraying layer (5);
the inlet end of the demisting device is communicated with the outlet end of the air outlet pipe (7), and the outlet end of the demisting device is communicated with a chimney; and
the inlet end of the wastewater tank is communicated with the outlet end of the slurry outlet pipe (8);
the air inlet pipe (2) comprises an inner pipeline (21), an outer pipeline (22) and a slurry outlet (24) with a funnel-shaped structure, an air inlet (23) is formed in the side wall of the slurry outlet (24), the output end of the booster fan (1) penetrates through the tower body of the desulfurizing tower from the outside and then is connected and fixed to the air inlet (23), and the booster fan (1) pressurizes sulfide gas and then guides the sulfide gas into the inner pipeline (21) from the air inlet (23); the spraying device (4) comprises a spraying interlayer (41) spirally encircling the periphery of the air inlet pipe (2) and a plurality of nozzles (42) arranged on the lower surface of the spraying interlayer (41), the nozzles (42) are communicated with the spraying interlayer (41), the spraying interlayer (41) is longitudinally spirally arranged at intervals so that a spraying layer (5) is formed between two adjacent layers of the spraying interlayers (41), the inlet end of the spraying interlayer (41) is connected with a slurry inlet pipe (3) arranged on the outer wall of the desulfurizing tower body, and the slurry inlet pipe (3) guides lime slurry into the spraying interlayer (41); a plurality of first baffles (9) are arranged on the outer pipe wall of the air inlet pipe (2) in an axially protruding mode, the first baffles (9) are fixed on the upper surface of each spraying interlayer (41), and the height of each first baffle (9) is smaller than that of each spraying layer (5); the water pump (6) is arranged and fixed at the bottom of the spraying interlayer (41) at the front end of the first baffle (9), a plurality of through holes (25) are formed in the pipe wall of the outer pipe (22) at intervals along the axial direction, the through holes (25) are communicated with the interlayer between the inner pipe (21) and the outer pipe (22), the opening positions of the through holes (25) are in one-to-one correspondence with the positions of the water pump (6), the output end of the water pump (6) is correspondingly connected to the through holes (25), and the water pump (6) pumps lime slurry into the interlayer of the air inlet pipe (2) through the through holes (25); a plurality of spraying holes (26) are uniformly formed in the pipe wall of the inner pipe (21), a plurality of second baffles (28) are transversely attached and clamped between the outer pipe wall of the inner pipe (21) and the inner pipe wall of the outer pipe (22), and the second baffles (28) are axially located between two adjacent through holes (25).
2. The tail gas purifying device for sectional treatment according to claim 1, wherein the inner pipe (21) is coaxially arranged in the outer pipe (22) at intervals, an annular baffle plate (27) is attached between the periphery of the opening at the upper end of the inner pipe (21) and the periphery of the opening at the upper end of the outer pipe (22), and the tops of the inner pipe (21) and the outer pipe (22) are fixed in a sealing manner by sandwiching the annular baffle plate (27); the upper end of the slurry outlet (24) is connected with the lower end of the inner pipeline (21), the outer diameter of the opening at the lower end of the slurry outlet (24) is smaller than the inner diameter of the outlet at the bottom of the desulfurizing tower body, the lower end of the slurry outlet (24) is led out outwards from the outlet at the bottom of the desulfurizing tower body, and the leading-out end extends downwards and is embedded in the slurry outlet pipe (8) at coaxial intervals.
3. The exhaust gas purifying apparatus for the sectional treatment according to claim 2, wherein a plurality of mounting holes (43) are provided on the lower surface of the spray interlayer (41) in a direction perpendicular to the lower surface thereof, the mounting holes (43) are communicated with the spray interlayer (41), and the mounting holes (43) cover the width direction of the spray interlayer (41); the nozzle (42) is arranged in the mounting hole (43), and the nozzle (42) sprays downwards along the direction perpendicular to the lower surface of the spraying interlayer (41).
4. A sectional exhaust gas purifying apparatus according to claim 3, wherein a water level sensor (10) is mounted on the front end surface of the first baffle plate (9), and the terminal end of the water level sensor (10) is connected to a controller, and the controller is connected to the water pump (6).
5. The tail gas purifying device for sectional treatment according to claim 4, wherein the bottom of the desulfurizing tower is provided in a funnel-shaped structure, the bottom outlet of the desulfurizing tower is communicated with the slurry outlet pipe (8), the bottom outlet of the desulfurizing tower is positioned at the lower end of the gas inlet (23), and the slurry outlet pipe (8) between the position where the bottom outlet of the desulfurizing tower is communicated with the slurry outlet pipe (8) and the gas inlet (23) is filled with the back-flowing lime slurry, and the lime slurry in the bottom of the desulfurizing tower and the inner pipe (21) are introduced into the wastewater tank together after being collected in the slurry outlet pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910430062.9A CN110180372B (en) | 2019-05-22 | 2019-05-22 | Tail gas purification device of sectional type processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910430062.9A CN110180372B (en) | 2019-05-22 | 2019-05-22 | Tail gas purification device of sectional type processing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110180372A CN110180372A (en) | 2019-08-30 |
| CN110180372B true CN110180372B (en) | 2023-11-17 |
Family
ID=67717368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910430062.9A Active CN110180372B (en) | 2019-05-22 | 2019-05-22 | Tail gas purification device of sectional type processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110180372B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112933901B (en) * | 2019-12-11 | 2022-12-06 | 青岛双瑞海洋环境工程股份有限公司 | Integrated device for waste gas desulfurization and inert gas supply |
| CN112973359B (en) * | 2021-03-18 | 2022-03-29 | 中国石油大学(北京) | Sectional liquid discharge type combined coalescent filter element |
| CN117358054B (en) * | 2023-11-27 | 2024-03-19 | 北京实力伟业环保科技有限公司 | Waste gas biological treatment device based on high acid-resistant desulfurization strain |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279184A (en) * | 2008-05-29 | 2008-10-08 | 武汉凯迪电力环保有限公司 | Helical airflow type wet method flue gas desulfurization process and spraying tower thereof |
| CN204469533U (en) * | 2015-01-28 | 2015-07-15 | 华能国际电力股份有限公司 | A kind of fractional order reaction composite desulfate tower |
| CN207324372U (en) * | 2017-10-20 | 2018-05-08 | 刘收大 | Spiral desulfurizing tower |
| CN208526266U (en) * | 2018-04-18 | 2019-02-22 | 深圳市中科创想科技有限责任公司 | A kind of spray-absorption device for wet desulphurization |
| CN210278777U (en) * | 2019-05-22 | 2020-04-10 | 苏州仕净环保科技股份有限公司 | Tail gas purification device with sectional type treatment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2959808C (en) * | 2014-09-02 | 2023-06-13 | Angelo DI NOI | Filtering device for dust and other polluttants |
-
2019
- 2019-05-22 CN CN201910430062.9A patent/CN110180372B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279184A (en) * | 2008-05-29 | 2008-10-08 | 武汉凯迪电力环保有限公司 | Helical airflow type wet method flue gas desulfurization process and spraying tower thereof |
| CN204469533U (en) * | 2015-01-28 | 2015-07-15 | 华能国际电力股份有限公司 | A kind of fractional order reaction composite desulfate tower |
| CN207324372U (en) * | 2017-10-20 | 2018-05-08 | 刘收大 | Spiral desulfurizing tower |
| CN208526266U (en) * | 2018-04-18 | 2019-02-22 | 深圳市中科创想科技有限责任公司 | A kind of spray-absorption device for wet desulphurization |
| CN210278777U (en) * | 2019-05-22 | 2020-04-10 | 苏州仕净环保科技股份有限公司 | Tail gas purification device with sectional type treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110180372A (en) | 2019-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110180372B (en) | Tail gas purification device of sectional type processing | |
| CN211098372U (en) | Efficient flue gas desulfurization tower | |
| CN210729130U (en) | Spiral high-efficient purifying column | |
| CN115178082A (en) | Desulfurization absorption tower system and slurry foam eliminating method thereof | |
| CN210278778U (en) | Industrial purification system for removing sulfide gas | |
| CN203342607U (en) | Wet-type water film constant-flow high-voltage industrial waste gas purifier | |
| CN210278777U (en) | Tail gas purification device with sectional type treatment | |
| CN202078849U (en) | Bubbling device for removing acidic gas | |
| CN105964081A (en) | Small-sized multilayer dust removal and desulfurization device | |
| CN211384488U (en) | High-efficient oxidation unit of desulfurization | |
| CN110180373B (en) | Industrial purification system for removing sulfide gas | |
| CN101254389A (en) | Epitaxial furnace tail gas cleaner | |
| CN110711448A (en) | Spiral dust collector falls in slope | |
| CN217526889U (en) | Double-layer flue gas cooperative purification tower | |
| KR101147982B1 (en) | System for preprocessing of bio-gas | |
| CN210674723U (en) | Sulfuric acid cracking acid gas purification and post-treatment system | |
| JP2006320828A (en) | Wet-type flue gas desulfurization apparatus | |
| CN211612084U (en) | Fine dust removal device for Venturi | |
| CN210845840U (en) | Flue gas purification system | |
| CN210356657U (en) | Organic waste gas purification device | |
| CN207204379U (en) | Field coupling demister | |
| CN112957894A (en) | High-efficient integration landfill leachate sewage station exhaust treatment device | |
| CN220746110U (en) | Electrolytic aluminum flue gas purification system | |
| CN215610520U (en) | Desulfurization and denitrification integrated reaction tower | |
| CN219804440U (en) | Wet flue gas desulfurization device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 215137 4th floor, 82 Jincheng Road, Taiping Street, Xiangcheng District, Suzhou City, Jiangsu Province Applicant after: Suzhou Shijing Technology Co.,Ltd. Address before: 215137 4th floor, 82 Jincheng Road, Taiping Street, Xiangcheng District, Suzhou City, Jiangsu Province Applicant before: SUZHOU SHIJING ENVIRONMENTAL TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |