CN113893652B - System and method for treating odor of spraying pot - Google Patents
System and method for treating odor of spraying pot Download PDFInfo
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- CN113893652B CN113893652B CN202111132778.4A CN202111132778A CN113893652B CN 113893652 B CN113893652 B CN 113893652B CN 202111132778 A CN202111132778 A CN 202111132778A CN 113893652 B CN113893652 B CN 113893652B
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- 238000005507 spraying Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 139
- 239000010865 sewage Substances 0.000 claims abstract description 44
- 238000009833 condensation Methods 0.000 claims abstract description 34
- 230000005494 condensation Effects 0.000 claims abstract description 34
- 239000006260 foam Substances 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 6
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims description 19
- 238000011084 recovery Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000003915 air pollution Methods 0.000 abstract description 2
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 16
- 230000000694 effects Effects 0.000 description 8
- 238000004537 pulping Methods 0.000 description 6
- 238000009835 boiling Methods 0.000 description 5
- 238000010411 cooking Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000008400 supply water Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010025 steaming 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/14—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 by absorption
-
- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Paper (AREA)
Abstract
The invention provides a system and a method for treating odor of a spraying pot, and aims to solve the technical problem that the odor is directly discharged and polluted outside due to the fact that the exhaust amount is large and difficult to treat when the pot is placed. The abatement system includes: the sewage hot water tank is connected with the water inlet of the condensation sprayer, and the outlet of the sewage hot water tank is connected with the water inlet at one side of the condensation sprayer after passing through the heat exchanger. The treatment method is carried out by the system and comprises the following steps: step S1, before putting the boiler, supplying water to a condensation injector in advance for a certain time to enable an exhaust pipe to establish micro negative pressure; and S2, after the system pressure is stable, slurry pumping is started, water is continuously supplied to the condensing injector, water enters the condensing injector at a certain pressure and temperature after heat exchange, and atomized water foam and high-speed jet mode are sprayed out. The invention can effectively solve the problem of large exhaust gas quantity and difficult treatment, and can avoid direct external pollution discharge of odor and air pollution.
Description
Technical Field
The invention relates to the technical field of pollution treatment, in particular to an odor treatment system and an odor treatment method for a spraying pot.
Background
Because the traditional intermittent vertical cooker cooking process of the pulping factory adopts pressurized spraying (namely hot spraying process, the temperature of the placing cooker is more than 100 ℃), and a large amount of crude pulp is high in Wen Chouqi during placing. The prior technology for treating and discharging odor is only suitable for 3 ten thousand meters 3 An odor level of not more than 3 ten thousand m 3 The per-h odor quantity can not achieve better treatment effect, and a large amount of odor is still directly dischargedInto the atmosphere, contaminating the air.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a system and a method for treating odor of a jet cooker, which are used for solving the problem that the odor is directly discharged and polluted outside due to the large exhaust gas when the jet cooker is put in a gap vertical cooker in a pulp mill for cooking.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
spout pot odor treatment system includes: the outlet of the upper part of the spraying pot is connected with an alkali furnace through a low-concentration odor pipe, and a bypass valve is arranged on the low-concentration odor pipe; the air inlet at the upper end of the condensing ejector is connected with a low-concentration odor pipe between the spraying pot and the bypass valve; the outlet of the sewage tank is connected with the water inlet at one side of the condensation injector after passing through the heat exchanger; the water outlet at the lower end of the condensing sprayer is connected with the inlet of the sewage water tank, and the sewage water tank is also connected with an alkali recovery furnace.
The invention can effectively treat the odor of the spraying pot and has better treatment effect on the yield of 20 ten thousand tons per year and more of pulping capacity. When the exhaust gas is replaced in the later stage of cooking, the drift phenomenon does not occur, the temperature and the gas quantity of the odor discharged during the pot placing are stable, the problem that the exhaust gas quantity is difficult to treat is effectively solved, and the direct external pollution discharge of the odor is avoided; and the occupied area is small, so that the investment cost is greatly saved.
Optionally, the sewage water tank is connected with the heat exchanger through a second pipeline, the heat exchanger is connected with the water inlet of the condensation injector through a third pipeline, a first control valve and an injection pump are arranged on the second pipeline, and a second control valve is arranged on the third pipeline; the water outlet at the lower end of the condensing ejector is connected with the inlet of the sewage and hot water tank through a fourth pipeline, a fifth pipeline connected with the fourth pipeline is arranged between the second control valve and the heat exchanger, and a third control valve is arranged on the fifth pipeline.
Optionally, the heat exchanger is further connected with a cooling water pipeline and a return water pipeline, and the sewage hot water tank is further connected with a supplementing water pipeline.
Optionally, the vertical distance from the end face of the water outlet of the condensation sprayer to the inlet of the sewage tank is more than or equal to 10cm.
Optionally, the condensing injector includes: the device comprises a device body and an inner cavity concentrically arranged in the device body, wherein a plurality of fan-shaped nozzles are surrounded on the outer wall of the inner cavity, a plurality of longitudinal nozzles are arranged at the top of the inner cavity, a liquid inlet pipe is arranged on one surface of the device body, a water inlet is arranged on the liquid inlet pipe, and a filter is arranged on one side of the water inlet. The nozzle in the condensing sprayer of the invention can not be blocked due to scaling, can avoid the pressure drop of condensed water, can always keep better odor absorption capacity, namely, a large amount of low-concentration odor is absorbed by atomized water foam generated by the fan-shaped nozzle, and a small amount of non-condensing odor is brought into a sewage hot water tank by high-speed water flow generated by the longitudinal nozzle and then sent to an alkali recovery furnace for combustion through an odor pipeline, thereby effectively solving the problem that the exhaust gas is difficult to treat, and effectively avoiding direct external pollution discharge of the odor to air.
The method for treating the odor of the spraying pot is carried out by adopting the system of any one of the above steps and comprises the following steps:
step S1, supplying water to a condensation injector in advance for a certain time before the coarse pulp enters a spraying pot, and enabling the water to enter the condensation injector at a certain pressure and temperature after heat exchange so as to enable an exhaust pipe to establish micro negative pressure;
and S2, after the system pressure is stable, slurry pumping is started, water is continuously supplied to the condensing injector, water enters the condensing injector at a certain pressure and temperature after heat exchange, and atomized water foam and high-speed jet mode are sprayed out.
Optionally, the odor treatment method further comprises: and S3, after the pot is placed, closing the second control valve, opening the third control valve and the bypass valve, delivering a small amount of odor to the alkaline furnace for combustion after the low-concentration odor is washed, continuously running the jet pump, and continuously cooling the sewage by the heat exchanger.
Optionally, the step S1 includes the following steps:
s11, before discharging, starting a jet pump in advance for a certain time;
s12, opening the second control valve and closing the third control valve;
s13, the temperature of the spray water after heat exchange is less than or equal to 45 ℃, and water is supplied to the condensing injector at a pressure of more than or equal to 0.05MPa so that the exhaust pipe establishes micro negative pressure.
Optionally, in the step S2, the temperature of the water flow after heat exchange is less than or equal to 45 ℃, and the water flow enters the condensation injector at a pressure of greater than or equal to 0.05 MPa.
Optionally, in step S2, the water flow is sprayed out through a plurality of fan-shaped nozzles and a plurality of longitudinal nozzles in a manner of atomizing water foam and high-speed jet, the atomizing water foam absorbs a large amount of low-concentration odor, and a small amount of non-condensation odor is brought into the sewage hot water tank through the high-speed jet and then sent to the alkali recovery furnace for combustion.
The beneficial effects of the invention are as follows:
1. the invention can effectively treat the odor exhausted by the cooking and spraying pot of the gap vertical pot in the pulping factory, has better treatment effect on the yield of 20 ten thousand tons/year and more, and has small occupied area and lower investment.
2. The nozzle in the condensing sprayer can not be blocked due to scaling, can avoid the pressure drop of condensed water, can keep better odor absorption capacity all the time, a large amount of low-concentration odor is absorbed by atomized water foam generated by the fan-shaped nozzle, and a small amount of non-condensing odor is conveyed to the alkali recovery furnace for combustion after being brought into the sewage hot water tank by high-speed water flow generated by the longitudinal nozzle through the odor pipeline, so that the problem that the exhaust gas is difficult to treat can be effectively solved, and the direct external pollution discharge of the odor is effectively avoided.
3. The invention can not generate bias flow phenomenon when the steam boiler is replaced in the later stage of steaming, so that the temperature and the air quantity of the odor discharged during pot discharging are stable, the problem that the air quantity is difficult to treat is effectively solved, the direct external pollution discharge of the odor is avoided, the heat exchange efficiency is high, the treatment cost is low, and the investment cost can be greatly saved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the odor treatment system of the jet cooker of the invention.
Fig. 2 is a schematic view of the structure of the condensing injector of the present invention.
Fig. 3 is a top view of fig. 2 in accordance with the present invention.
Fig. 4 is a schematic diagram of a prior art ZJF spray condenser.
Reference numerals: 1. spraying a pot; 2. a condensing ejector; 20. a body; 201. an air inlet; 202. a taper pipe; 203. a water outlet; 21. a liquid inlet pipe; 210. a water inlet; 22. a filter; 23. an inner cavity; 230. a boss; 231. an inclined plane; 24. a fan nozzle; 25. a longitudinal nozzle; 26. a manhole; 27. a pressure gauge; 3. a sewage hot water tank; 4. a heat exchanger; 5. a first pipeline; 6. a low-concentration odor pipe; 6a, a bypass valve; 7. a second pipeline; 7a, a first control valve; 8. a jet pump; 9. a third pipeline; 9a, a second control valve; 10. a fourth pipeline; 11. a fifth pipeline; 11a, a third control valve; 12. a cooling water pipeline; 13. a water return line; 13a, a fourth control valve; 14. a make-up water line; 14a, a fifth control valve; 15. an odor pipeline; 100. an orifice plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Because the traditional intermittent vertical cooker cooking process of the pulping factory adopts pressurized spraying (namely hot spraying process, the temperature of the placing cooker is more than 100 ℃), and a large amount of crude pulp is high in Wen Chouqi during placing. The prior technology for treating and discharging odor is only suitable for 3 ten thousand meters 3 An odor level of not more than 3 ten thousand m 3 The odor quantity per hour can not achieve better treatment effect, and a large amount of odor is still directly discharged into the atmosphere to pollute the air.
Example 1
As shown in fig. 1, an embodiment of the present invention provides an odor treatment system for a blow-down pot, which includes a blow-down pot 1, a condensation injector 2, a dirty water tank 3, a heat exchanger 4, and the like.
The outlet of the upper part of the spraying pot 1 is connected with an alkali furnace through a low-concentration odor pipe 6, and a bypass valve 6a is arranged on the low-concentration odor pipe 6.
The upper end of the condensing injector 2 is provided with an air inlet, and a low-concentration odor pipe 6 between the spraying pot 1 and a bypass valve 6a is connected with the air inlet at the upper end of the condensing injector 2 through a first pipeline 5.
The outlet of the sewage water tank 3 is connected with the inlet of the heat exchanger 4 through a second pipeline 7, and the outlet of the heat exchanger 4 is connected with the water inlet of the condensing injector 2 through a third pipeline 9.
A second pipeline 7 between the sewage water tank 3 and the heat exchanger 4 is provided with a jet pump 8 and a first control valve 7a. A second control valve 9a is provided in the third line 9 between the heat exchanger 4 and the condensing injector 2.
The water outlet of the condensing sprayer 2 is connected with the inlet of the sewage water tank 3 through a fourth pipeline 10. A fifth line 11 connected to the fourth line 10 is provided between the second control valve 9a and the heat exchanger 4, and a third control valve 11a is provided in the fifth line 11.
The heat exchanger 4 is also connected with a cooling water pipeline 12 and a return water pipeline 13, and the return water pipeline 13 is provided with a fourth control valve 13a. The sewage tank 3 is connected with a water supplementing pipeline 14, a fifth control valve 14a is arranged on the water supplementing pipeline 14, and the sewage tank 3 is also connected with an alkali recovery furnace through an odor pipeline 15.
When the steam cooker enters a discharging program, a control system (DCS system) automatically starts the jet pump 8 in advance of 60 seconds, opens the first control valve 7a, opens the second control valve 9a, closes the third control valve 11a to supply water to the condensation injector 2, and enables the exhaust pipe to establish micro negative pressure (-100 Pa-0 Pa). The injected water is subjected to heat exchange by a heat exchanger 4 before being subjected to condensation of the injector 2, so that the water temperature is not higher than 45 ℃. After the system pressure is stable, a boiling pot discharging valve is opened to start pulp pumping, a large amount of low-concentration odor generated after the coarse pulp enters a spraying pot 1 is absorbed by a condensation sprayer 2, a small amount of non-condensation odor is brought into a sewage hot water tank 3 by high-speed water flow, and finally the sewage is sent to an alkali recovery furnace for combustion through an odor pipeline 15. In order to reduce the energy consumption, after the putting of the pot is completed, the third control valve 11a is opened, the second control valve 9a is closed, the bypass valve 6a on the low-concentration odor pipe 6 of the putting pot 1 is opened, a small amount of odor in the putting pot 1 is directly removed for pulping, low-concentration odor washing treatment and then is sent to an alkali furnace for burning, namely the low-concentration odor alkali removal furnace, and the next pot putting operation is prepared until the period is finished. When the putting of the pot is completed, the jet pump 8 continues to operate until the temperature of the polluted water is reduced to within 45 ℃.
Example 2
In the conventional ZJF jet condenser (as shown in fig. 4), the orifice plate 100 at the top of the condenser is easy to scale and block, so that the pressure of condensed water is reduced, the odor absorption capacity is reduced, and finally, the odor is directly discharged outside to pollute the air.
As shown in fig. 1 to 3, the embodiment of the invention provides an odor treatment system for a jet cooker, which comprises a jet cooker 1, a condensation injector 2, a sewage water tank 3, a heat exchanger 4 and the like.
The outlet of the upper part of the spraying pot 1 is connected with an alkali furnace through a low-concentration odor pipe 6, and a bypass valve 6a is arranged on the low-concentration odor pipe 6. The upper end of the condensing injector 2 is provided with an air inlet 201, and the low-concentration odor pipe 6 between the spraying pot 1 and the bypass valve 6a is connected with the air inlet 201 at the upper end of the condensing injector 2 through a first pipeline 5. The outlet of the sewage water tank 3 is connected with the inlet of the heat exchanger 4 through a second pipeline 7, and the outlet of the heat exchanger 4 is connected with the water inlet 210 of the condensing injector 2 through a third pipeline 9. A second pipeline 7 between the sewage water tank 3 and the heat exchanger 4 is provided with a jet pump 8 and a first control valve 7a. A second control valve 9a is provided in the third line 9 between the heat exchanger 4 and the condensing injector 2. The water outlet of the condensing sprayer 2 is connected with the inlet of the sewage water tank 3 through a fourth pipeline 10. A fifth line 11 connected to the fourth line 10 is provided between the second control valve 9a and the heat exchanger 4, and a third control valve 11a is provided in the fifth line 11. The heat exchanger 4 is also connected with a cooling water pipeline 12 and a return water pipeline 13, and the return water pipeline 13 is provided with a fourth control valve 13a. The sewage tank 3 is connected with a water supplementing pipeline 14, a fifth control valve 14a is arranged on the water supplementing pipeline 14, and the sewage tank 3 is also connected with an alkali recovery furnace through an odor pipeline 15.
The condensing ejector 2 includes: a body 20, a liquid inlet pipe 21, a filter 22 and an inner cavity 23.
The upper end of the device body 20 is provided with an air inlet 201, and the lower end of the taper pipe 202 at the lower end is provided with a water outlet 203; the liquid inlet pipe 21 is arranged on one side surface of the device body 20, the liquid inlet pipe 21 is provided with a water inlet 210, and the filter 22 is arranged in the liquid inlet pipe 21 on one side of the water inlet 210. The inner cavity 23 is concentrically disposed within the body 20. The device body 20 is also provided with a manhole 26. The liquid inlet pipe 21 is provided with a pressure gauge 27.
The inner cavity 23 is provided with a plurality of fan-shaped nozzles 24 along the length direction thereof, and the plurality of fan-shaped nozzles 24 are distributed in a ring-shaped structure, i.e. the plurality of fan-shaped nozzles 24 are equidistantly encircling the outer wall of the inner cavity 23.
The upper surface of the top of the inner cavity 23 is provided with a plurality of longitudinal nozzles 25, and the plurality of longitudinal nozzles 25 are distributed in an annular mode at equal intervals. Further, the top of the inner cavity 23 has a boss 230, i.e. the upper portion of the inner cavity 23 is gradually folded to form the boss 230. A plurality of longitudinal nozzles 25 are mounted on the boss 230, and the fan-shaped nozzles 24 are disposed below the boss 230, i.e. a slope 231 is provided between the boss 230 and the fan-shaped nozzles 24. The vertical distance from the lower end surface of the water outlet 203 of the device body 20 to the inlet of the sewage water tank 3 is more than or equal to 10m.
When in use, after a certain amount of water enters the inner cavity 23 through the water inlet 210 at a certain pressure, the pressure is more than or equal to 0.05MPa, the water is sprayed out through the fan-shaped nozzles 24 and the longitudinal nozzles 25, so that the water flow in the water leg pipe is injected into the sewage hot water tank 3 at a higher flow speed, a certain vacuum effect is generated, and the odor in the spraying pot 1 is absorbed and taken away. The atomized water foam generated by the fan-shaped nozzle 24 at a higher water jet speed absorbs low-concentration odor, and the non-condensable gas is brought into the sewage tank 3 by the vacuum effect formed by the high-speed jet generated by the vertical nozzle 25. Moreover, the fan-shaped nozzles 24 and the vertical nozzles 25 of the condensing injector are not blocked by scaling, so that the pressure drop of condensed water is avoided, and the odor absorbing capability is better.
The treatment method comprises the following steps: firstly, when the digester enters a discharging program, a control system (DCS system) automatically starts the jet pump 8 in advance for 60 seconds, opens the second control valve 9a, closes the third control valve 11a to supply water to the condensation injector 2, and enables the exhaust pipe to establish micro negative pressure (-100 Pa-0 Pa). The injected water is subjected to heat exchange by a heat exchanger 4 before being subjected to condensation of the injector 2, so that the water temperature is not higher than 45 ℃. When the pressure of the system is stable, a boiling pot discharging valve of the boiling pot is started to pump pulp, a large amount of low-concentration odor generated after the crude pulp enters the spraying pot 1 is absorbed by atomized water foam generated by the fan-shaped nozzle 24, a small amount of non-condensation odor is brought into the sewage hot water tank 3 by high-speed water flow generated by the longitudinal nozzle 25, and finally the sewage is sent to the alkali recovery furnace for combustion through the odor pipeline 15. In order to reduce the energy consumption, after the putting of the pot is completed, the third control valve 11a is opened, the second control valve 9a is closed, the bypass valve 6a on the low-concentration odor pipe 6 of the putting pot 1 is opened, a small amount of odor in the putting pot 1 is directly removed for pulping, low-concentration odor washing treatment and then is sent to an alkali furnace for burning, namely the low-concentration odor alkali removal furnace, and the next pot putting operation is prepared until the period is finished. When the putting of the pot is completed, the jet pump 8 continues to operate until the temperature of the polluted water is reduced to within 45 ℃.
Through the structure, the fan-shaped nozzle 24 and the longitudinal nozzle 25 are not blocked due to scaling, and the condensation pressure of the fan-shaped nozzle is not reduced, so that the good absorption capacity can be kept all the time, and the direct external pollution discharge of odor and air pollution are effectively avoided. And the treatment system has high heat exchange efficiency and low treatment cost.
Example 3
As shown in fig. 1 to 3, the embodiment of the present invention provides a method for treating odor of a blow-down pot, which is performed by using the system described in embodiment 1 and/or embodiment 2, and includes the following steps:
step S1, before the coarse pulp enters the spraying pot 1, water is supplied to the condensation injector 2 for a certain time in advance, so that the exhaust pipe establishes micro negative pressure.
When the digester enters a discharging program, the DCS system automatically starts the jet pump 8 in advance of 60 seconds, the second control valve 9a is opened, the third control valve 11a is closed to supply water to the condensing injector 2, the jet water is subjected to heat exchange through the heat exchanger 4 and then is supplied to the condensing injector 2 at a pressure of more than or equal to 0.05MPa, and the exhaust pipe is made to establish micro negative pressure. The vertical distance from the lower end surface of the water outlet 203 of the condensing injector 2 to the inlet of the sewage water tank 3 is more than or equal to 10m, the water supply temperature is less than or equal to 45 ℃, and the micro negative pressure of the exhaust pipe is minus 100Pa to 0Pa.
Step S2, after the system pressure is stable, slurry pumping is started, water is continuously supplied to the condensation injector 2, and water enters the condensation injector at a certain pressure and temperature after heat exchange, and is sprayed out in an atomized water foam and high-speed jet mode.
After the system pressure is stable, a boiling pot discharging valve of the boiling pot is started to pump slurry, a large amount of low-concentration odor is generated after the coarse slurry enters the spraying pot 1, at the moment, water is continuously supplied to the condensation injector 2 through the jet pump 8, a certain amount of water enters the condensation injector 2 at a pressure of more than or equal to 0.05MPa after heat exchange of the heat exchanger 4, namely, the water enters the inner cavity 23 through a water inlet 210 of the condensation injector 2 at a pressure of not less than 0.05MPa, and then the water is sprayed out through a plurality of fan-shaped nozzles 24 and a plurality of longitudinal nozzles 25, so that the water flow in a water leg pipe is enabled to be injected into the sewage water tank 3 at a high flow speed, a certain vacuum effect is generated, and the odor in the spraying pot 1 is absorbed and taken away. A large amount of low-concentration odor is absorbed by atomized water foam generated by the fan-shaped nozzle 24, a small amount of non-condensed odor is brought into the sewage water tank 3 by high-speed jet flow generated by the vertical nozzle 25, and finally is sent to the alkali recovery furnace for combustion through the odor pipeline 15. The method ensures that the temperature and the air quantity of the odor discharged by the method are stable when the pot is put in, and the method can thoroughly solve the problem of odor discharge.
And S3, after the putting of the pot is completed, opening the third control valve 11a, closing the second control valve 9a, simultaneously opening the bypass valve 6, directly removing a small amount of odor in the spraying pot 1 to pulp and wash the low-concentration odor, and then delivering the low-concentration odor to an alkaline furnace for burning until the end of the period, and preparing the next pot putting operation. When the putting of the pot is completed, the jet pump 8 continues to operate until the temperature of the polluted water is reduced to within 45 ℃.
The method can effectively solve the problem of large exhaust gas quantity and difficult treatment, and for more than 3 ten thousand m 3 The odor quantity per hour can also beAchieving better treatment effect. Moreover, the problems of large occupied area and high investment (the occupied area of the heat exchanger and the scrubbing tower is large, the investment is high) are solved, the investment is saved by more than 20% compared with the heat exchanger, and the investment is saved by more than 50% compared with the scrubbing tower.
Not described in detail, are techniques well known in the art.
In the foregoing, only certain exemplary embodiments have been described briefly. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," "outer," "end," "side," etc. refer to an orientation or positional relationship based on that shown in the drawings, or that is conventionally put in place when the product of the present invention is used, or that is conventionally understood by those skilled in the art, merely for convenience of description and simplicity of description, and are not intended to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Claims (3)
1. The utility model provides a spout a pot odor treatment method, includes a spout a pot odor treatment system, its characterized in that, spout a pot odor treatment system and include:
the outlet of the upper part of the spraying pot is connected with an alkali furnace through a low-concentration odor pipe, and a bypass valve is arranged on the low-concentration odor pipe;
the air inlet at the upper end of the condensing ejector is connected with a low-concentration odor pipe between the spraying pot and the bypass valve;
the outlet of the sewage tank is connected with the water inlet at one side of the condensation injector after passing through the heat exchanger;
the water outlet at the lower end of the condensing sprayer is connected with the inlet of the sewage water tank, and the sewage water tank is also connected with an alkali recovery furnace;
the condensing eductor includes: the device comprises a device body and an inner cavity concentrically arranged in the device body, wherein the outer wall of the inner cavity is surrounded by a plurality of fan-shaped nozzles, and a plurality of longitudinal nozzles are arranged at the top of the inner cavity; the upper part of the inner cavity is gradually folded to form a boss, the longitudinal nozzles are annularly distributed on the boss, and the fan-shaped nozzles are arranged below the boss;
the vertical distance from the end face of the water outlet of the condensation sprayer to the inlet of the sewage tank is more than or equal to 10m;
the sewage water tank is connected with the heat exchanger through a second pipeline, the heat exchanger is connected with a water inlet of the condensation injector through a third pipeline, a first control valve and an injection pump are arranged on the second pipeline, and a second control valve is arranged on the third pipeline; a water outlet at the lower end of the condensation ejector is connected with an inlet of the sewage and hot water tank through a fourth pipeline, a fifth pipeline connected with the fourth pipeline is arranged between the second control valve and the heat exchanger, and a third control valve is arranged on the fifth pipeline;
the odor treatment system of the spraying pot comprises the following steps:
step S1, supplying water to a condensation injector in advance for a certain time before the coarse pulp enters a spraying pot, and enabling the water to enter the condensation injector at a certain pressure and temperature after heat exchange so as to enable an exhaust pipe to establish micro negative pressure;
s2, after the system pressure is stable, slurry pumping is started, water is continuously supplied to the condensing injector, water enters the condensing injector at a certain pressure and temperature after heat exchange, and is sprayed out in an atomized water foam and high-speed jet mode;
s3, after the pot is put, closing the second control valve, opening the third control valve and the bypass valve, delivering a small amount of odor to the alkaline furnace for combustion after the low-concentration odor is washed, continuously operating the jet pump, and continuously cooling the sewage by the heat exchanger;
the step S1 comprises the following steps:
s11, before discharging, starting a jet pump in advance for a certain time;
s12, opening the second control valve and closing the third control valve;
s13, the temperature of the sprayed water after heat exchange is less than or equal to 45 ℃, and water is supplied to the condensation injector at a pressure of more than or equal to 0.05MPa, so that the exhaust pipe establishes micro negative pressure of minus 100Pa to 0 Pa;
in the step S2, the temperature of the water flow after heat exchange is less than or equal to 45 ℃, and the water flow enters a condensation injector at a pressure of more than or equal to 0.05 MPa;
in the step S2, water flow is sprayed out in an atomized water foam and high-speed jet mode through a plurality of fan-shaped nozzles and a plurality of longitudinal nozzles, the atomized water foam absorbs a large amount of low-concentration odor, and a small amount of non-condensable odor is conveyed into a sewage hot water tank through the high-speed jet and then is sent to an alkali recovery furnace for combustion.
2. The method for treating odor of a pan as defined in claim 1, wherein the heat exchanger is further connected with a cooling water pipe and a water return pipe, and the sewage tank is further connected with a water supplementing pipe.
3. The method for treating odor of a blowout pot according to claim 1 or 2, wherein a liquid inlet pipe is arranged on one surface of the device body, a water inlet is arranged on the liquid inlet pipe, and a filter is arranged on one side of the water inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111132778.4A CN113893652B (en) | 2021-09-27 | 2021-09-27 | System and method for treating odor of spraying pot |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111132778.4A CN113893652B (en) | 2021-09-27 | 2021-09-27 | System and method for treating odor of spraying pot |
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| CN113893652A CN113893652A (en) | 2022-01-07 |
| CN113893652B true CN113893652B (en) | 2024-01-19 |
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| CN201105201Y (en) * | 2006-12-28 | 2008-08-27 | 四川瑞松纸业有限公司 | Kraft pulping odor treatment device |
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| FI123022B (en) * | 2007-09-03 | 2012-10-15 | Andritz Oy | Method for treating odor gases in a pulp mill |
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| CN102019133A (en) * | 2010-11-01 | 2011-04-20 | 永州湘江纸业有限责任公司 | Environment-friendly treatment method and device for odor |
| CN105107361A (en) * | 2015-09-10 | 2015-12-02 | 武汉凯比思电力设备有限公司 | Treatment device for pulping stink of paper mill |
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