CN114558423B - Asphalt flue gas coke powder injection adsorption purification device - Google Patents
Asphalt flue gas coke powder injection adsorption purification device Download PDFInfo
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- CN114558423B CN114558423B CN202210366927.1A CN202210366927A CN114558423B CN 114558423 B CN114558423 B CN 114558423B CN 202210366927 A CN202210366927 A CN 202210366927A CN 114558423 B CN114558423 B CN 114558423B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/06—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 adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
- B01D53/10—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 adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2258/00—Sources of waste gases
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Abstract
一种沥青烟气焦粉喷射吸附净化装置，包括：喷射吸附装置、除尘装置；所述喷射吸附装置包括：吸附反应器、自动供料装置、前文丘里喷射器、后文丘里喷射器；所述前文丘里喷射器与后文丘里喷射器下方中间位置设有管径调节机构；所述除尘装置入口与吸附反应器顶部通过第一烟气管道连通，所述除尘装置出口通过第二烟气管道连接脱硫处理装置。该沥青烟气焦粉喷射吸附净化装置利用煅烧系统产生的高温烟气对低温烟气及石油焦粉加热，并根据布袋除尘器入口处的烟气温度，自动调节进入吸附反应器中的高温烟气流量，并结合喷射吸附装置，使流体混合充分、均匀，吸附效果更好，从而有效避免布袋除尘器净化烟气时所产生的糊袋现象，延长布袋除尘器的使用周期。
A asphalt flue gas coke powder jet adsorption purification device comprises: a jet adsorption device and a dust removal device; the jet adsorption device comprises: an adsorption reactor, an automatic feeding device, a front venturi injector, and a rear venturi injector; a pipe diameter adjustment mechanism is provided in the middle position below the front venturi injector and the rear venturi injector; the inlet of the dust removal device is connected to the top of the adsorption reactor through a first flue gas pipeline, and the outlet of the dust removal device is connected to a desulfurization treatment device through a second flue gas pipeline. The asphalt flue gas coke powder jet adsorption purification device utilizes the high-temperature flue gas generated by the calcination system to heat the low-temperature flue gas and petroleum coke powder, and automatically adjusts the flow rate of the high-temperature flue gas entering the adsorption reactor according to the flue gas temperature at the inlet of the bag filter, and is combined with the jet adsorption device to make the fluid mix fully and evenly, and the adsorption effect is better, thereby effectively avoiding the bag sticking phenomenon generated when the bag filter purifies the flue gas, and extending the service life of the bag filter.
Description
[ Field of technology ]
The invention belongs to the technical field of purifying treatment of calcined petroleum coke flue gas, and particularly relates to a device for purifying flue gas by utilizing petroleum coke powder injection adsorption in the petroleum coke calcination process of carbon products.
[ Background Art ]
In the calcination process, petroleum coke is generally used as a raw material for the carbon product for aluminum, and moisture and volatile matters in the raw material are removed through high-temperature calcination to meet the quality requirement of a prebaked anode product, and a large amount of harmful smoke is generated in the process. Therefore, the flue gas must be cleaned before it is discharged. At present, methods such as adsorption, electric capturing, washing, incineration, condensation and the like are often adopted at home and abroad for purification treatment.
However, in actual industrial production, because the smoke components are complex, and the fluctuation of parameters such as the smoke concentration, the temperature, the humidity and the like in the pipeline is larger along with the different production conditions and the different working environments, the smoke purification treatment is difficult. In addition, no matter the purification treatment is carried out by adopting one or more methods, a great amount of funds are needed to be invested in the early stages of equipment, flue gas pipeline transformation and the like, and a proper purification method is difficult to find by a field test mode aiming at a specific production condition.
In addition, the high-temperature flue gas discharged from the calciner can be discharged at high altitude after being subjected to denitration, waste heat boiler recycling, flue gas purification, desulfurization, demisting and other treatments. The high-temperature flue gas is changed into high-humidity and high-viscosity acidic low-temperature flue gas dust after being recycled by the waste heat boiler, the acidic low-temperature flue gas dust is easy to deposit or corrode the purification equipment in the later stage, and if the equipment is not treated by adopting a proper method, the equipment can be reduced in function and even scrapped after a period of operation.
In order to solve the problems, most enterprises today usually adopt a bag-type dust collector to purify the flue gas, but when the temperature of the flue gas is too low (lower than the dew point temperature) and the humidity is too high, a large amount of dust can adhere to the surface of a filter bag to block the pores of the filter bag, and the phenomenon of dewing and pasting a bag is caused. The air permeability of the filter bag can be drastically reduced by the 'pasting bag', the running resistance is greatly increased, and the filter bag needs to be maintained or replaced regularly, so that the running cost of enterprises is greatly increased. Taking 50 ten thousand tons of calcined coke yield per year as an example, the flue gas flow rate is 30 ten thousand Nm 3/h, and during flue gas purification treatment, the direct economic loss of enterprises per year is up to millions of yuan due to the need of maintaining or replacing a bag-type dust collector.
[ Invention ]
According to the invention, the high-temperature flue gas generated by the calcination system is utilized to heat the low-temperature flue gas and the petroleum coke powder, the flow rate of the high-temperature flue gas entering the adsorption reactor is automatically regulated according to the temperature of the flue gas at the inlet of the bag-type dust collector, and the adjustable spray adsorption device is combined, so that the fluid is fully and uniformly mixed, the adsorption effect is better, the phenomenon of bag pasting generated when the bag-type dust collector purifies the flue gas is effectively avoided, and the service cycle of the bag-type dust collector is greatly prolonged. Therefore, the device has the advantages of good purifying effect, high economic benefit, safety, reliability and the like.
The invention is realized by the following technical scheme, and provides an asphalt flue gas coke powder injection adsorption purification device, which comprises: a jet adsorption device and a dust removal device;
the jet adsorption apparatus includes: the device comprises an adsorption reactor, an automatic feeding device, a three-way distributor, a front venturi ejector and a rear venturi ejector;
The adsorption reactor sequentially comprises the following components from top to bottom: the first hollow cuboid, the first hollow quadrangular frustum, the second hollow cuboid and the second hollow quadrangular frustum;
the top end of the first hollow cuboid is closed;
one side of the lower end of the second hollow cuboid is communicated with an exhaust flue of the waste heat boiler through a low-temperature flue gas flue, the other side of the lower end of the second hollow cuboid is communicated with an exhaust flue of the calcining and denitration treatment device through a high-temperature flue gas flue, and an electric regulating valve is arranged on the high-temperature flue gas flue;
a sewage draining cover is arranged at the bottom of the second hollow quadrangular frustum;
The feed inlet at the top end of the three-way distributor is communicated with the discharge outlet of the automatic feeding device, and the two discharge outlets at the lower end are respectively communicated with the front venturi ejector and the rear venturi ejector through pipelines;
the front venturi ejector and the rear venturi ejector are obliquely arranged above the second hollow cuboid, and a pipe diameter adjusting mechanism is obliquely arranged in the middle position below the front venturi ejector and the rear venturi ejector;
The dust removing apparatus includes: a bag dust collector, a coke powder-carrying screw conveyor and a desulfurization treatment device;
The air inlet of the bag-type dust collector is communicated with a first hollow cuboid through a first flue gas pipeline, a first electric gate valve, a unidirectional explosion-proof valve, a temperature transmitter and a pressure transmitter are sequentially arranged on the first flue gas pipeline from the first hollow cuboid to the side of the bag-type dust collector, the air outlet of the bag-type dust collector is communicated with a desulfurization treatment device through a second flue gas pipeline, an induced draft fan is arranged between the second flue gas pipeline and the desulfurization treatment device, and an explosion venting device is arranged on the outer side plate of the bag-type dust collector;
The coke powder carrying spiral conveyor is arranged at the bottom of the bag-type dust remover.
In particular, the first hollow quadrangular frustum pyramid comprises a left side wall and a right side wall, the inclination of the left side wall is larger than that of the right side wall, a rectangular guide plate is arranged at the position, above the right side wall, of the top of the second hollow cuboid, and a plurality of round through holes are uniformly formed in the rectangular guide plate.
In particular, the first hollow cuboid is provided with a flame detector and a fire extinguishing system.
In particular, the top of the automatic feeding device is provided with a feeding bin, one side of the feeding bin is provided with a bucket elevator for conveying petroleum coke powder to the feeding bin, and one side of the automatic feeding device, which is far away from the adsorption reactor, is provided with a crawling ladder.
In particular, the included angles between the front venturi ejector and the rear venturi ejector and the horizontal plane are all 30-50 degrees.
In particular, two first arc guide plates extend from the connection position of the low-temperature flue gas flue and the second hollow cuboid, the two first arc guide plates are respectively arranged on the upper side and the lower side of the low-temperature flue gas flue, two second arc guide plates extend from the connection position of the high-temperature flue gas flue and the second hollow cuboid, the two second arc guide plates are respectively arranged on the upper side and the lower side of the high-temperature flue gas flue, and a plurality of waist-shaped through holes are uniformly formed in the first arc guide plates and the second arc guide plates.
In particular, the inner cavity of the low-temperature flue gas flue has a larger size than that of the high-temperature flue gas flue.
In particular, the pipe diameter adjusting mechanism comprises: the device comprises a first L-shaped bottom plate, a second L-shaped bottom plate, a screw rod, adjusting nuts and two adjusting conical heads, wherein the first L-shaped bottom plate and the second L-shaped bottom plate are respectively arranged on the inner side and the outer side of the side wall of the adsorption reactor to form a semi-closed cuboid, the screw rod is arranged on the opening side of the semi-closed cuboid, the adjusting nuts are in threaded connection with the screw rod, the end parts of the two adjusting conical heads are respectively inserted into a front venturi ejector and a rear venturi ejector, and the adjusting conical heads are connected with the adjusting nuts through connecting plates.
Particularly, a coke carrying powder bin is arranged at the discharge port side of the coke carrying powder screw conveyor, and a coke carrying powder lifting machine is arranged between the coke carrying powder bin and the coke carrying powder screw conveyor.
In particular, it further comprises: spare flue gas processing apparatus, reserve flue gas processing apparatus locates on the reserve flue, reserve flue one end is located on the first flue gas pipeline between adsorption reactor and the first electronic flashboard valve, and the other end is located on the second flue gas pipeline between sack cleaner and the draught fan, reserve flue is close to first flue gas pipeline's position and is equipped with the second electronic flashboard valve.
Compared with the prior art, the asphalt flue gas coke powder injection adsorption purification device provided by the invention has the following beneficial effects:
(1) And the flue gas temperature is automatically regulated by using a system heat source after calcination and denitration, so that the occurrence of the phenomenon of bag pasting is reduced.
The high-temperature flue gas flue and the electric regulating valve are arranged, the flow of the high-temperature flue gas entering the adsorption reactor is automatically regulated according to the temperature of the flue gas after injection and adsorption, the temperature of the flue gas after injection and adsorption before entering the bag-type dust collector is ensured to be between 180 and 200 ℃, and meanwhile, the moisture of the flue gas can be reduced, and the occurrence of the phenomenon of bag pasting is reduced.
(2) The adjustable spray adsorption device is adopted, so that the spray adsorption effect is good.
According to the bucket elevator conveying system capable of automatically adjusting the petroleum coke powder conveying amount according to the jet adsorption effect, the two venturi ejectors which are symmetrical front and back and are arranged with the jet pipes obliquely downwards, and the pipe diameter adjusting mechanism for simultaneously adjusting the pipe diameters of the front venturi ejectors and the rear venturi ejectors are combined with a plurality of guide plates and other structures arranged in the adsorption reactor, so that the high-temperature flue gas, the low-temperature flue gas and the petroleum coke powder are ensured to be uniformly mixed and fully adsorbed in the adsorption reactor, and the purifying effect is good.
(3) The adsorption raw materials are obtained locally and recycled, and the economic benefit is good.
The device is mainly applied to flue gas purification treatment in the production process of calcined petroleum coke, and calcined petroleum coke products are subjected to drying, refining, screening and the like to be used as adsorption materials of the jet adsorption purification device, so that local materials are obtained, and the cost is saved; meanwhile, after the coke carrying powder after spray absorption is recycled, the coke carrying powder can be used as an adsorption material of the spray absorption purification device again, so that the recycling is realized, and the economic benefit is good.
(4) The multistage fire-extinguishing and explosion-proof device is arranged, and the system is safe and reliable.
The flame detector and the fire extinguishing system are arranged at the upper part of the adsorption reactor, and the one-way explosion suppression valve is close to the inlet of the bag-type dust collector, and the explosion venting devices are uniformly distributed on the outer side plate of the bag-type dust collector, so that the whole device can stably operate under safe and reliable conditions.
[ Description of the drawings ]
FIG. 1 is a workflow diagram of the present invention;
FIG. 2 is a front view of an asphalt flue gas coke powder spray adsorption purification device of the invention;
FIG. 3 is a top view of an asphalt flue gas coke powder spray adsorption purification device of the invention;
FIG. 4 is a front view of an asphalt flue gas coke powder spraying, adsorbing and purifying device without a bucket elevator, a ladder stand and a maintenance operation platform;
FIG. 5 is a top view of an asphalt flue gas coke powder spray adsorption purification device without a bucket elevator, a ladder stand and a maintenance operation platform;
FIG. 6 is a partial cross-sectional view of an adsorption reactor in an asphalt flue gas coke powder jet adsorption purification device of the present invention;
FIG. 7 is an expanded view of a first arc deflector in an asphalt flue gas coke powder spray adsorption purification device according to the present invention;
FIG. 8 is a front view of a spray adsorption device in a pitch flue gas coke powder spray adsorption purification device according to the present invention;
FIG. 9 is a top view of a jet adsorption device in a pitch flue gas coke powder jet adsorption purification device according to the present invention;
FIG. 10 is an enlarged view of a portion of the invention at I of FIG. 8;
FIG. 11 is a cross-sectional view taken at A-A of FIG. 10;
FIG. 12 is a simulation analysis model of flue gas temperature rise and coke powder particle distribution in an adsorption reactor according to the present invention;
FIG. 13 is a flow chart of flue gas and coke breeze particles in an adsorption reactor according to the present invention;
FIG. 14 is a graph showing the distribution of coke powder particles in an adsorption reactor according to the present invention;
FIG. 15 is an internal temperature field of an adsorption reactor according to the present invention;
FIG. 16 shows an adsorption reaction according to the invention and (5) a flue gas temperature distribution map at the outlet of the device.
In the drawing, a 1-bucket elevator, a 2-feeding bin, a 3-automatic feeding device, a 4-tee distributor, a 5-crawling ladder, a 6-front Venturi ejector, a 7-pipe diameter adjusting mechanism, a 701-screw rod, a 702-first L-shaped bottom plate, a 703-second L-shaped bottom plate, a 704-adjusting nut, a 705-connecting plate, a 706-adjusting conical head, an 8-low temperature flue gas flue, a 9-adsorption reactor, a 901-first hollow cuboid, a 902-first hollow quadrangular frustum, a 903-second hollow cuboid, a 904-first arc-shaped guide plate, a 905-second hollow quadrangular frustum, a 906-blowdown cover, 907-waist-shaped through holes, a 908-supporting rod, a 909-second arc-shaped guide plate, a 910-rectangular guide plate, a 10-high temperature flue gas flue, an 11-electric adjusting valve, a 12-coke carrying powder spiral conveyor, a 13-bag dust remover, a 14-coke carrying powder elevator, a 15-coke carrying powder bin, a 16-induced draft fan, a 17-treatment device, a 18-second flue gas pipeline, a 19-explosion venting device, a 20-pressure transmitter and a 21-temperature transmitter; 22-one-way explosion-proof valve, 23-first flue gas pipeline, 24-first electric gate valve, 25-flame detector, fire extinguishing system, 26-maintenance operation platform, 27-post venturi ejector, 28-second electric gate valve, 29-standby flue and 30-standby flue gas treatment device.
[ Detailed description ] of the invention
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Referring to fig. 1 to 11, the present invention provides an asphalt flue gas coke powder spraying, adsorbing and purifying device, which is characterized by comprising: a jet adsorption device and a dust removal device;
The jet adsorption apparatus includes: an adsorption reactor 9, an automatic feeding device 3, a three-way distributor 4, a front Venturi ejector 6 and a rear Venturi ejector 27;
The adsorption reactor 9 comprises, in order from top to bottom: a first hollow cuboid 901, a first hollow quadrangular frustum 902, a second hollow cuboid 903, a second hollow quadrangular frustum 905;
the top end of the first hollow cuboid 901 is closed;
One side of the lower end of the second hollow cuboid 903 is communicated with an exhaust flue of the waste heat boiler through a low-temperature flue gas flue 8, the other side of the second hollow cuboid 903 is communicated with an exhaust flue of the calcining and denitrating treatment device through a high-temperature flue gas flue 10, an electric regulating valve 11 is arranged on the high-temperature flue gas flue 10, and the electric regulating valve 11 can control the flow rate of the high-temperature flue gas entering the adsorption reactor 9 so as to ensure that the temperature of the flue gas after injection adsorption is between 180 and 200 ℃ before the flue gas enters the bag-type dust remover 13, and the occurrence of the phenomenon of bag pasting is reduced;
A drain cover 906 is arranged at the bottom of the second hollow quadrangular frustum 905;
The top end feed inlet of the three-way distributor 4 is communicated with the discharge outlet of the automatic feeding device 3, and the two discharge outlets at the lower end are respectively communicated with the front venturi ejector 6 and the rear venturi ejector 27 through pipelines;
the front venturi ejector 6 and the rear venturi ejector 27 are obliquely arranged above the second hollow cuboid 903, and a pipe diameter adjusting mechanism 7 is obliquely arranged in the middle position below the front venturi ejector 6 and the rear venturi ejector 27;
The dust removing apparatus includes: a bag-type dust collector 13, a coke powder-carrying screw conveyor 12 and a desulfurization treatment device 17;
The air inlet of the bag-type dust collector 13 is communicated with a first hollow cuboid 901 through a first flue gas pipeline 23, the first flue gas pipeline 23 is sequentially provided with a first electric gate valve 24, a unidirectional explosion-proof valve 22, a temperature transmitter 21 and a pressure transmitter 20 from the first hollow cuboid 901 to the side of the bag-type dust collector 13, the air outlet of the bag-type dust collector 13 is communicated with a desulfurization treatment device 17 through a second flue gas pipeline 18, an induced draft fan 16 is arranged between the second flue gas pipeline 18 and the desulfurization treatment device 17, the temperature transmitter 21 and the pressure transmitter 20 are used for measuring and controlling flue gas pressure and temperature parameters before entering the bag-type dust collector 13, an explosion venting device 19 is arranged on the outer side plate of the bag-type dust collector 13, and the explosion venting device 19 is arranged on one side of the bag-type dust collector 13 far away from a dense area of personnel.
The coke powder carrying screw conveyor 12 is arranged at the bottom of the bag-type dust remover 13.
In particular, since most of the high-temperature flue gas in the calciner after denitration is recycled by the waste heat boiler and then changed into low-temperature flue gas, the low-temperature flue gas enters the adsorption reactor 9 from the low-temperature flue gas flue 8, and a small part of the high-temperature flue gas after being split by the electric regulating valve 11 enters the adsorption reactor 9 through the high-temperature flue gas flue 10 for heating, so that the low-temperature flue gas entering the adsorption reactor 9 has more flow and higher speed, and the first hollow quadrangular prism 902 comprises: the inclination of the left side wall is larger than that of the right side wall, namely the first hollow quadrangular frustum pyramid 902 is left and right asymmetric, the inclination of the left side wall on the same side with the low-temperature flue gas flue 8 is larger, and the inclination of the right side wall on the same side with the high-temperature flue gas flue 10 is smaller, so that the low-temperature flue gas, the high-temperature flue gas and petroleum coke powder can be mixed more uniformly in the adsorption reactor 9; in the present invention, a rectangular baffle 910 is disposed at a position above the right side wall at the top of the second hollow cuboid 903, and a plurality of circular through holes (not shown) are uniformly formed in the rectangular baffle 910, so as to split and reduce the flow rate, and thus mix the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder more uniformly, and the front, rear and right sides of the rectangular baffle 910 are welded to the inner wall of the second hollow cuboid 903, as shown in fig. 6.
In particular, since the fire may be caused by the high-temperature smoke, the first hollow cuboid 901 is provided with the flame detector and the fire extinguishing system 25, and in the invention, when the flame detector detects the ignition source, the fire extinguishing system is automatically started to spray water to extinguish fire, and meanwhile, the signal device uses the alarm and the flash lamp to send out an alarm, so that the safety is higher.
Specifically, a feeding bin 2 is arranged at the top of the automatic feeding device 3, a bucket elevator 1 for conveying petroleum coke powder to the feeding bin 2 is arranged at one side of the feeding bin 2, and a crawling ladder 5 is arranged at one side of the automatic feeding device 3 far away from the adsorption reactor 9; in the invention, the bucket elevator 1 is used for conveying petroleum coke powder into the feeding bin 2, and can increase or decrease the conveying amount of the petroleum coke powder according to the adsorption and purification conditions, so as to provide stable adsorption materials for the spray adsorption device, and the crawling ladder 5 and the overhaul operation platform 26 are used for carrying out overhaul operation on the feeding bin 2 and the automatic feeding device 3.
In particular, the included angles between the front venturi ejector 6 and the rear venturi ejector 27 and the horizontal plane are all 30-50 degrees, and in the invention, the included angles between the front venturi ejector 6 and the rear venturi ejector 27 and the horizontal plane are related to the flue gas amount and the volume of the adsorption reactor 9, and the larger the flue gas amount and the volume of the adsorption reactor 9 are, the larger the included angle is, and the smaller the contrary is.
Specifically, two first arc-shaped guide plates 904 extend from the connection position of the low-temperature flue gas flue 8 and the second hollow cuboid 903, the two first arc-shaped guide plates 904 are respectively arranged on the upper side and the lower side of the low-temperature flue gas flue 8, two second arc-shaped guide plates 909 extend from the connection position of the high-temperature flue gas flue 10 and the second hollow cuboid 903, the two second arc-shaped guide plates 909 are respectively arranged on the upper side and the lower side of the high-temperature flue gas flue 10, and a plurality of waist-shaped through holes 907 are uniformly formed in the first arc-shaped guide plates 904 and the second arc-shaped guide plates 909; in the present invention, the first arc-shaped baffle 904, the second arc-shaped baffle 909 and the waist-shaped through hole 907 can further achieve the purposes of diverting and reducing the flow velocity, so that the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder are more uniformly mixed, and the unfolding structures of the second arc-shaped baffle 909 and the first arc-shaped baffle 904 are the same, as shown in fig. 7, and in practical application, the dimensions thereof can be adjusted according to practical needs.
In particular, the inner cavity of the low-temperature flue gas flue 8 is larger than the inner cavity of the high-temperature flue gas flue 10, and the entering amount of the high-temperature flue gas can be regulated and controlled by combining the electric regulating valve 11, so that the temperature of the flue gas after the low-temperature flue gas and the high-temperature flue gas are mixed is 180-200 ℃, the temperature of the flue gas entering the bag-type dust collector 13 is ensured to be slightly higher than the dew point temperature of the flue gas, the phenomenon of 'pasting bags' generated when the bag-type dust collector 13 purifies the flue gas is effectively avoided, and the service cycle of the bag-type dust collector 13 is greatly prolonged.
In particular, the pipe diameter adjusting mechanism 7 includes: the device comprises a first L-shaped bottom plate 702, a second L-shaped bottom plate 703, a screw rod 701, an adjusting nut 704 and two adjusting conical heads 706, wherein the first L-shaped bottom plate 702 and the second L-shaped bottom plate 703 are respectively arranged on the inner side and the outer side of the side wall of the adsorption reactor 9 to form a semi-closed cuboid, the screw rod 701 is arranged on the opening side of the semi-closed cuboid, the adjusting nut 704 is in threaded connection with the screw rod 701, the end parts of the two adjusting conical heads 706 are respectively inserted into a front venturi ejector 6 and a rear venturi ejector 27, and the adjusting conical heads 706 are connected with the adjusting nut 704 through a connecting plate 705; during operation, the screw rod 701 is rotated in the forward direction, the adjusting nut 704 above the screw rod 701 moves obliquely upwards along the screw rod 701, so that the two adjusting conical heads 706 on the connecting plate 705 are driven to move obliquely upwards to the set positions along the axes of the front venturi ejector 6 and the rear venturi ejector 27 respectively, the pipe diameters of the front venturi ejector 6 and the rear venturi ejector 27 are reduced, and if the pipe diameters of the front venturi ejector 6 and the rear venturi ejector 27 are required to be increased, the screw rod 701 is rotated reversely in the above mode.
Particularly, in order to facilitate the recovery of the coke-carrying powder, a coke-carrying powder storage bin 15 is arranged at the discharge port side of the coke-carrying powder screw conveyor 12, and a coke-carrying powder lifting machine 14 is arranged between the coke-carrying powder storage bin 15 and the coke-carrying powder screw conveyor 12; when the coke powder conveying device works, the coke powder conveying screw 12 conveys the coke powder into the coke powder conveying elevator 14, and then the coke powder conveying elevator 14 conveys the coke powder into the coke powder conveying bin 15, so that the recycling of the coke powder is completed, and the clean and tidy working environment is ensured.
In particular, it further comprises: the device comprises a standby flue gas treatment device 30 and a standby flue gas duct 29, wherein the standby flue gas treatment device 30 is arranged on the standby flue gas duct 29, one end of the standby flue gas duct 29 is arranged on a first flue gas pipeline 23 between the adsorption reactor 9 and a first electric gate valve 24, the other end of the standby flue gas duct 29 is arranged on a second flue gas pipeline 18 between the bag-type dust remover 13 and the induced draft fan 16, and a second electric gate valve 28 is arranged at the position, close to the first flue gas pipeline 23, of the standby flue gas duct 29; in the invention, under the normal working state, the second electric gate valve 28 is closed, the first electric gate valve 24 is opened, when the bag-type dust collector 13 is abnormal or in the maintenance state, the second electric gate valve 28 is opened, the first electric gate valve 24 is closed, at the moment, the flue gas is purified by the standby flue gas treatment device 30, and the purified flue gas is desulfurized by the desulfurization treatment device 17, so that the air pollution caused by the discharge of the flue gas into the air is avoided.
The working process comprises the following steps:
(1) Adjusting venturi ejector pipe diameter
Through forward rotation of the screw rod 701, the adjusting nut 704 above the screw rod 701 moves obliquely upwards along the screw rod 701 to drive the two adjusting conical heads 706 on the connecting plate 705 to move obliquely upwards to the set positions along the axes of the front venturi ejector 6 and the rear venturi ejector 27 respectively, so that the pipe diameters of the front venturi ejector 6 and the rear venturi ejector 27 are reduced, and if the pipe diameters of the front venturi ejector 6 and the rear venturi ejector 27 are required to be increased, the screw rod 701 can be reversely rotated according to the mode.
(2) Petroleum coke powder conveying and spraying
Next, the bucket elevator 1 conveys the petroleum coke powder to the feeding bin 2, the petroleum coke powder in the feeding bin 2 enters the three-way distributor 4 through the automatic feeding device 3, and the petroleum coke powder in the three-way distributor 4 enters the feed inlets of the front venturi injector 6 and the rear venturi injector 27 through the equal amount of pipelines through two discharge holes at the lower end of the three-way distributor 4, so that the conveying and the injection of the petroleum coke powder are realized.
(3) Spray adsorption purification of flue gas
Next, the petroleum coke powder entering the cavities of the front venturi injector 6 and the rear venturi injector 27 is injected into the adsorption reactor 9, and after being fully mixed and adsorbed with the low-temperature flue gas conveyed by the low-temperature flue gas flue 8 and the high-temperature flue gas conveyed by the high-temperature flue gas flue 10 in the adsorption reactor 9, the mixed flue gas dust rises to the upper part of the adsorption reactor 9 and enters the first flue gas pipeline 23.
(4) Filtering dust-removing device for cloth bag dust remover
Then, the mixed flue gas dust enters the bag-type dust collector 13 through the air inlet of the bag-type dust collector 13 under the action of negative pressure to be filtered and dedusted, the purified gas enters the second flue gas pipeline 18 through the air outlet of the bag-type dust collector 13, ash falls into the coke-carrying powder screw conveyor 12 below through the slag hole of the bag-type dust collector 13, and the ash entering the coke-carrying powder screw conveyor 12 is transported to the coke-carrying powder storage bin 15 for collection through the coke-carrying powder lifting machine 14 and can be reused as an adsorbent after subsequent treatment, so that recycling is realized.
(5) Post-treatment and evacuation of flue gas
Finally, after the flue gas entering the second flue gas pipeline 18 enters the desulfurization treatment device 17 for desulfurization and demisting treatment, the flue gas is discharged into the air from high altitude, and if the bag-type dust collector 13 is abnormal or in an overhauling state during the desulfurization and demisting treatment, the standby flue gas treatment device 30 can be started for flue gas treatment, so that the flue gas can be normally treated and exhausted during overhauling.
In practical application, the adsorbent used by the jet adsorption purification device provided by the invention can also be activated carbon, fly ash and the like.
In order to verify the effect of the asphalt flue gas coke powder injection adsorption purification device, the effect is explained below in combination with a simulation experiment.
Fig. 12 is a simulation analysis model of the flue gas temperature rise and coke powder particle distribution situation in the adsorption reactor, and the simulation experiment is performed on the particle distribution situation during flue gas temperature rise and petroleum coke powder spray adsorption in the spray adsorption device under the conditions of determined coke powder spray quantity and spray speed by combining the actual working conditions, wherein the low-temperature flue gas temperature is 150 ℃, the high-temperature flue gas temperature is 800 ℃, and the verification results are shown in fig. 13, 14, 15 and 16.
Referring to fig. 13-14, fig. 13 is a flow chart of flue gas and coke powder particles in the adsorption reactor 9, wherein blue lines represent low temperature flue gas flow lines, red lines represent high temperature flue gas flow lines, and black pellets represent coke powder particles; fig. 14 is a distribution diagram of coke powder particles in the adsorption reactor 9, and blue pellets in fig. 14 represent coke powder particles. The low-temperature flue gas enters the adsorption reactor 9 from the left low-temperature flue gas flue 8, the high-temperature flue gas enters the right high-temperature flue gas flue 10 and the petroleum coke powder from the front venturi ejector 6 and the rear venturi ejector 27 respectively, and after being split and slowed down by the first arc guide plate 904, the second arc guide plate 909 and the rectangular guide plate 910, the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder have obvious diffusion effect in the adsorption reactor 9, are wide in distribution range and well mixed, and meet the injection adsorption requirement.
Fig. 15 shows the internal temperature field of the adsorption reactor, as shown in fig. 15, when the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder enter the adsorption reactor 9 and undergo heat exchange, the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder are fully mixed, and the temperatures of the upper half parts of the adsorption reactor 9 tend to be consistent.
Fig. 16 is a graph showing the temperature distribution of the flue gas at the outlet of the adsorption reactor, as shown in fig. 16, the highest temperature at 197 ℃ and the lowest temperature at 182 ℃ of the flue gas after oil coke powder spray adsorption at the outlet of the adsorption reactor 9 are 190 ℃ and the average temperature is 190 ℃, and the temperature distribution is reasonable, while the reasonable temperature of the flue gas after oil coke powder spray adsorption before entering the bag-type dust collector is 180-200 ℃, so that the temperature at the outlet of the adsorption reactor 9 meets the temperature requirement of the bag-type dust collector 13 for filtering dust collection.
Claims (8)
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| CN115301071B (en) * | 2022-08-19 | 2025-09-26 | 无锡雪浪环境科技股份有限公司 | Flue gas purification device |
| CN117258442B (en) * | 2023-11-23 | 2024-02-02 | 湖南洁滤环保科技有限公司 | A prevent sticking with paste bag control system for sack cleaner |
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| CA2036746A1 (en) * | 1990-07-31 | 1992-02-01 | Peter Z. Kubin | Process and apparatus for absorption/adsorption material injection |
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| CA2791965C (en) * | 2012-10-10 | 2013-12-17 | Novus Environmental Inc. | Apparatus and method for controlling airborne pollution |
| CN206935106U (en) * | 2017-07-10 | 2018-01-30 | 光大环保技术研究院（南京）有限公司 | A kind of SO in removing flue gas2Desulfurizer |
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