CN114558423A - Pitch flue gas coke powder sprays and adsorbs purifier - Google Patents
Pitch flue gas coke powder sprays and adsorbs purifier Download PDFInfo
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- CN114558423A CN114558423A CN202210366927.1A CN202210366927A CN114558423A CN 114558423 A CN114558423 A CN 114558423A CN 202210366927 A CN202210366927 A CN 202210366927A CN 114558423 A CN114558423 A CN 114558423A
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
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- B01D2258/0283—Flue gases
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Abstract
The utility model provides an asphalt flue gas fine coke sprays adsorbs purifier, includes: a spray adsorption device and a dust removal device; the spray adsorption device includes: the device comprises an adsorption reactor, an automatic feeding device, a front Venturi ejector and a rear Venturi ejector; a pipe diameter adjusting mechanism is arranged in the middle position below the front Venturi ejector and the rear Venturi ejector; the inlet of the dust removal device is communicated with the top of the adsorption reactor through a first flue gas pipeline, and the outlet of the dust removal device is connected with a desulfurization treatment device through a second flue gas pipeline. This pitch flue gas fine coke sprays to adsorb purifier utilizes the high temperature flue gas that the system of calcining produced to low temperature flue gas and the heating of petroleum fine coke, and according to the flue gas temperature of sack cleaner entrance, the automatically regulated gets into the high temperature flue gas flow among the adsorption reactor, and combines to spray adsorption equipment, makes the fluid mix abundant, even, and adsorption effect is better, thereby produced bag phenomenon of sticking with paste when effectively avoiding the sack cleaner to purify the flue gas, prolongs the life cycle of sack cleaner.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of calcined petroleum coke flue gas purification treatment, and particularly relates to a device for purifying flue gas by using petroleum coke powder injection adsorption in a petroleum coke calcination process of a carbon product.
[ background of the invention ]
In the calcination process of the carbon product for aluminum, petroleum coke is usually used as a raw material, and the high-temperature calcination is carried out to remove moisture and volatile components in the raw material so as to meet the quality requirement of a prebaked anode product, and a large amount of harmful flue gas can be generated in the process. Therefore, the flue gas must be cleaned before it is discharged. At present, the purification treatment is carried out by adopting methods such as adsorption, electric capture, washing, incineration, condensation and the like at home and abroad.
However, in actual industrial production, because the components of the flue gas are relatively complex, and the fluctuation of parameters such as flue gas concentration, temperature and humidity in the pipeline is large along with different production conditions and working environments, certain difficulties are brought to the flue gas purification treatment. In addition, no matter one or more of the above methods are adopted for purification treatment, a large amount of capital investment is required in the early stages of equipment and flue gas pipeline reconstruction, 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 is generally subjected to denitration, waste heat boiler recycling, flue gas purification, desulfurization, defogging and other treatments, and then can be discharged at high altitude. And 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 purification equipment in the later period, and if the acidic low-temperature flue gas dust is not treated by a proper method, the function of the equipment is reduced and even the equipment is scrapped after the acidic low-temperature flue gas dust runs for a period of time.
In order to solve the problems, most enterprises nowadays 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 be adhered to the surface of a filter bag to block the pores of the filter bag, and the phenomenon of bag pasting due to dewing is caused. The bag pasting can lead the air permeability of the filter bag to be sharply reduced, the running resistance to be greatly increased, and the filter bag needs to be periodically maintained or replaced, thus greatly increasing the running cost of enterprises. Taking 50 million tons of calcined coke capacity per year as an example, the flue gas flow rate is 30 ten thousand Nm3And/h, during the flue gas purification treatment, the direct economic loss of enterprises per year is up to millions of yuan due to the fact that bag pasting needs to be maintained or bag-type dust collectors need to be replaced.
[ summary of the invention ]
Aiming at the problems, the invention provides an asphalt flue gas coke powder spraying, adsorbing and purifying device, which utilizes high-temperature flue gas generated by a calcining system to heat low-temperature flue gas and petroleum coke powder, automatically adjusts the flow of the high-temperature flue gas entering an adsorption reactor according to the temperature of the flue gas at the inlet of a bag-type dust collector, and is combined with an adjustable spraying and adsorbing device to ensure that fluid is fully and uniformly mixed and the adsorption effect is better, thereby effectively avoiding the bag-sticking phenomenon generated when the bag-type dust collector purifies the flue gas and greatly prolonging the service cycle of the bag-type dust collector. Therefore, the device has the advantages of good purification 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 spraying, adsorbing and purifying device, which comprises: a spray adsorption device and a dust removal device;
the spray adsorption device 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 comprises from top to bottom in sequence: the device comprises a first hollow cuboid, a first hollow quadrangular frustum, a second hollow cuboid and a 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 discharge cover is arranged at the bottom of the second hollow quadrangular table;
the feed inlet at the top end of the three-way distributor is communicated with the discharge outlets of the automatic feeding device, and the two discharge outlets at the lower end of the three-way distributor 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 pipe diameter adjusting mechanisms are obliquely arranged in the middle positions below the front Venturi ejector and the rear Venturi ejector;
the dust removing device comprises: the device comprises a bag-type dust collector, a coke powder-carrying spiral conveyor and a desulfurization treatment device;
the bag-type dust collector is characterized in that an 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 one-way 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, an 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 an outer side plate of the bag-type dust collector;
the coke powder-carrying screw conveyor is arranged at the bottom of the bag-type dust collector.
The first hollow rectangular 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, located above the right side wall, of the top of the second hollow rectangular cuboid, and a plurality of circular through holes are uniformly formed in the rectangular guide plate.
In particular, a flame detector and a fire extinguishing system are arranged on the first hollow cuboid.
Particularly, a feeding bin is arranged at the top of the automatic feeding device, a bucket elevator for conveying the petroleum coke powder to the feeding bin is arranged on one side of the feeding bin, and a crawling ladder is arranged on one side, far away from the adsorption reactor, of the automatic feeding device.
Particularly, the included angle between the front Venturi ejector and the rear Venturi ejector and the horizontal plane is 30-50 degrees.
Particularly, two first arc guide plates are extended from the position where the low-temperature flue gas flue is connected with 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 are extended from the position where the high-temperature flue gas flue is connected with 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 size of the inner cavity of the low-temperature flue gas flue is larger than that of the inner cavity of the high-temperature flue gas flue.
In particular, the pipe diameter adjustment mechanism comprises: first L type bottom plate, second L type bottom plate, lead screw, adjusting nut, two regulation conical heads, the inside and outside both sides of adsorption reactor lateral wall are located respectively to first L type bottom plate, second L type bottom plate, form semi-closed cuboid, the opening side of semi-closed cuboid is located to the lead screw, adjusting nut and lead screw threaded connection, two regulation conical head tip insert respectively before in venturi sprayer, the back venturi sprayer, and should adjust and be connected through the connecting plate between conical head and the adjusting nut.
Particularly, a coke powder loading bin is arranged on the side of the discharge port of the coke powder loading screw conveyor, and a coke powder loading hoister is arranged between the coke powder loading bin and the coke powder loading screw conveyor.
In particular, the method also comprises the following steps: reserve flue gas processing apparatus, reserve flue gas processing apparatus locates on the reserve flue, on first flue gas pipeline between adsorption reactor and the first electronic flashboard valve was located to reserve flue one end, on the second flue gas pipeline between sack cleaner and the draught fan was located to the other end, the position that reserve flue is close to first flue gas pipeline was equipped with the electronic flashboard valve of second.
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) the flue gas temperature is automatically adjusted by utilizing the heat source of the system after calcination and denitration, so that the bag pasting phenomenon 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 the spraying adsorption, the temperature of the flue gas after the spraying adsorption before entering the bag-type dust collector is ensured to be between 180 ℃ and 200 ℃, meanwhile, the moisture of the flue gas can be reduced, and the bag pasting phenomenon is reduced.
(2) And an adjustable injection adsorption device is adopted, so that the injection adsorption effect is good.
According to the bucket elevator conveying system capable of automatically adjusting the conveying capacity of the petroleum coke powder according to the injection adsorption effect, two sets of venturi ejectors which are symmetrical in front and back and are arranged with the injection pipes obliquely and downwards and a pipe diameter adjusting mechanism for adjusting the pipe diameters of the front venturi ejector and the rear venturi ejector simultaneously are combined with a plurality of guide plates and other structures arranged in the adsorption reactor, so that the uniform mixing, the sufficient adsorption and the good purification effect of the high-temperature flue gas, the low-temperature flue gas and the petroleum coke powder in the adsorption reactor are ensured.
(3) The adsorption raw materials are locally obtained 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 the calcined petroleum coke product is dried, refined, screened and the like and then used as an adsorption material of the jet adsorption purification device, so that local materials are used, and the cost is saved; meanwhile, the coke-loaded powder after the spraying adsorption can be used as the adsorption material of the spraying adsorption purification device again after being recycled, so that the cyclic utilization is realized, and the economic benefit is better.
(4) The multistage fire-extinguishing explosion-proof device is arranged, and the system is safe and reliable.
The flame detector and the fire extinguishing system which are arranged on the upper part of the adsorption reactor are close to the one-way explosion-proof valve at the inlet of the bag-type dust remover, and the explosion venting devices which are uniformly distributed on the outer side plate of the bag-type dust remover ensure that the whole device stably runs under safe and reliable conditions.
[ description of the drawings ]
FIG. 1 is a flow chart of the operation of the present invention;
FIG. 2 is a front view of the coke powder spraying, adsorbing and purifying device for asphalt flue gas of the present invention;
FIG. 3 is a top view of the asphalt flue gas coke powder spraying, adsorbing and purifying device of the present invention;
FIG. 4 is a front view of the asphalt flue gas coke powder spraying, adsorbing and purifying device of the present invention without a bucket elevator, a ladder stand and an overhaul operating platform;
FIG. 5 is a top view of the asphalt flue gas coke powder spraying, adsorbing and purifying device of the present invention without a bucket elevator, a ladder and an overhaul operating platform;
FIG. 6 is a partial sectional view of an adsorption reactor in the asphalt flue gas coke powder spraying, adsorbing and purifying apparatus according to the present invention;
FIG. 7 is an expanded view of a first arc-shaped guide plate in the asphalt flue gas coke powder spraying, adsorbing and purifying device of the present invention;
FIG. 8 is a front view of a spray adsorption device in the asphalt flue gas coke powder spray adsorption purification device of the present invention;
FIG. 9 is a top view of a spray adsorption device in the asphalt flue gas coke powder spray adsorption purification device of the present invention;
FIG. 10 is an enlarged view of the invention at section 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 the flue gas temperature rise and coke powder particle distribution in the adsorption reactor of the present invention;
FIG. 13 is a flow chart of flue gas and coke breeze particles in an adsorption reactor of the present invention;
FIG. 14 is a coke breeze particle distribution diagram in an adsorption reactor according to the present invention;
FIG. 15 is a graph of the internal temperature field of the adsorption reactor of the present invention;
FIG. 16 is a graph of the temperature profile of the flue gas at the outlet of the adsorption reactor of the present invention.
In the attached drawing, 1-bucket elevator, 2-feeding bin, 3-automatic feeding device, 4-three-way distributor, 5-ladder, 6-front Venturi ejector, 7-pipe diameter adjusting mechanism, 701-leading screw, 702-first L-shaped bottom plate, 703-second L-shaped bottom plate, 704-adjusting nut, 705-connecting plate, 706-adjusting cone head, 8-low temperature flue gas flue, 9-adsorption reactor, 901-first hollow cuboid, 902-first hollow quadrangular frustum, 903-second hollow cuboid, 904-first arc guide plate, 905-second hollow quadrangular frustum, 906-sewage discharge cover, 907-waist-shaped through hole, 908-supporting rod, 909-second arc guide plate, 910-rectangular guide plate, 10-a high-temperature flue gas flue, 11-an electric regulating valve, 12-a coke powder-carrying spiral conveyor, 13-a bag-type dust remover, 14-a coke powder-carrying hoister, 15-a coke powder-carrying bin, 16-an induced draft fan, 17-a desulfurization treatment device, 18-a second flue gas pipeline, 19-an explosion venting device, 20-a pressure transmitter and 21-a temperature transmitter; 22-one-way explosion-proof valve, 23-first flue gas pipeline, 24-first electric gate valve, 25-flame detector and fire extinguishing system, 26-maintenance operation platform, 27-rear Venturi ejector, 28-second electric gate valve, 29-standby flue and 30-standby flue gas processing device.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
Referring to fig. 1 to 11, the present invention provides an asphalt flue gas coke powder spraying, adsorbing and purifying apparatus, which comprises: a spray adsorption device and a dust removal device;
the spray adsorption device includes: the device comprises 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 from top to bottom in sequence: a first hollow cuboid 901, a first hollow quadrangular frustum 902, a second hollow cuboid 903 and 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 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 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 of the high-temperature flue gas entering the adsorption reactor 9 so as to ensure that the temperature of the flue gas after being sprayed and adsorbed is between 180 ℃ and 200 ℃ before entering a bag-type dust collector 13, thereby reducing the occurrence of bag pasting phenomenon;
a sewage discharge cover 906 is arranged at the bottom of the second hollow quadrangular frustum 905;
the top feed inlet of the three-way distributor 4 is communicated with the discharge outlets 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 at the middle position below the front venturi ejector 6 and the rear venturi ejector 27;
the dust removing device comprises: a bag-type dust collector 13, a coke powder-carrying screw conveyor 12 and a desulfurization treatment device 17;
13 air inlets of sack cleaner communicate through first flue gas pipeline 23 with first hollow cuboid 901, and this first flue gas pipeline 23 is equipped with first electronic slide valve 24, one-way flame proof valve 22, temperature transmitter 21, pressure transmitter 20 by first hollow cuboid 901 to 13 sides of sack cleaner in proper order, through second flue gas pipeline 18 intercommunication between 13 gas outlets of sack cleaner and the desulfurization processing apparatus 17, and be equipped with draught fan 16 between this second flue gas pipeline 18 and the desulfurization processing apparatus 17, temperature transmitter 21, pressure transmitter 20 are used for measuring and control flue gas pressure, the temperature parameter before getting into sack cleaner 13, be equipped with explosion venting device 19 on the outer panel of sack cleaner 13, this explosion venting device 19 locates the one side that personnel intensive region was kept away from to sack cleaner 13.
The coke powder carrying screw conveyor 12 is arranged at the bottom of the bag-type dust collector 13.
In particular, because the high-temperature flue gas after denitration in most calcining furnaces becomes low-temperature flue gas after being recycled by the exhaust-heat boiler, the low-temperature flue gas enters the adsorption reactor 9 through the low-temperature flue gas duct 8, and a small part of the high-temperature flue gas after being shunted by the electric control valve 11 enters the adsorption reactor 9 through the high-temperature flue gas duct 10 for temperature rise, so that the low-temperature flue gas entering the adsorption reactor 9 has more flow and higher speed, and in order to fully mix the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder in the adsorption reactor 9, the first hollow quadrangular frustum 902 comprises: the inclination of the left side wall is larger than that of the right side wall, namely, the first hollow quadrangular frustum 902 is asymmetric left and right, the inclination of the left side wall on the same side with the low-temperature flue gas duct 8 is larger, and the inclination of the right side wall on the same side with the high-temperature flue gas duct 10 is smaller, so that the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder can be mixed more uniformly in the adsorption reactor 9; in the invention, a rectangular guide plate 910 is arranged at the top of the second hollow cuboid 903 above the right side wall, and a plurality of circular through holes (not shown in the figure) are uniformly arranged on the rectangular guide plate 910, so that the functions of shunting and reducing the flow velocity can be achieved, so that the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder are more uniformly mixed, and the front, the back and the right sides of the rectangular guide plate 910 are respectively welded on the inner wall of the second hollow cuboid 903, as shown in fig. 6.
In particular, since high-temperature smoke may cause a fire, the first hollow cuboid 901 is provided with a flame detector and a fire extinguishing system 25, in the invention, after the flame detector detects an ignition source, the fire extinguishing system is automatically started to spray water for fire extinguishing, and meanwhile, a signal device uses an alarm and a flash lamp to give an alarm, so that the safety is high.
Particularly, a feeding bin 2 is arranged at the top of the automatic feeding device 3, a bucket elevator 1 for conveying the petroleum coke powder to the feeding bin 2 is arranged on one side of the feeding bin 2, and a ladder 5 is arranged on one side of the automatic feeding device 3 away from the adsorption reactor 9; in the invention, the bucket elevator 1 is used for conveying petroleum coke powder to the feeding bin 2, and can increase or decrease the conveying amount of the petroleum coke powder according to the adsorption and purification conditions to provide stable adsorption materials for the spray adsorption device, and the ladder 5 and the maintenance operation platform 26 are used for performing maintenance operation on the feeding bin 2 and the automatic feeding device 3.
Particularly, the included angles between the front venturi ejector 6 and the rear venturi ejector 27 and the horizontal plane are both 30-50 degrees, 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 included angle is.
Particularly, two first arc-shaped guide plates 904 extend out from the position where the low-temperature flue gas flue 8 is connected with 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 out from the position where the high-temperature flue gas flue 10 is connected with 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 flow guide plate 904, the second arc-shaped flow guide plate 909 and the waist-shaped through hole 907 can further achieve the purposes of shunting and reducing the flow rate, so that the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder are more uniformly mixed, the second arc-shaped flow guide plate 909 and the first arc-shaped flow guide plate 904 have the same unfolding structure, as shown in fig. 7, and in practical application, the size of the second arc-shaped flow guide plate 909 can be adjusted according to actual needs.
Particularly, the size of the inner cavity of the low-temperature flue gas flue 8 is larger than that of the inner cavity of the high-temperature flue gas flue 10, and the entering amount of the high-temperature flue gas can be adjusted and controlled by combining with the electric adjusting 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 remover 13 is ensured to be slightly higher than the dew point temperature of the flue gas, the bag-sticking phenomenon generated when the bag-type dust remover 13 purifies the flue gas is effectively avoided, and the service cycle of the bag-type dust remover 13 is greatly prolonged.
In particular, the pipe diameter adjusting mechanism 7 includes: the adsorption reactor 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 moves obliquely upward along the screw rod 701 to drive the two adjusting conical heads 706 on the connecting plate 705 to move obliquely upward to a set position 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 is rotated in the reverse direction in the above manner.
Particularly, in order to facilitate the recovery of the coke-loaded powder, a coke-loaded powder bin 15 is arranged at the discharge port side of the coke-loaded powder screw conveyor 12, and a coke-loaded powder elevator 14 is arranged between the coke-loaded powder bin 15 and the coke-loaded powder screw conveyor 12; therefore, during operation, the coke powder carrying screw conveyor 12 conveys the coke powder to the coke powder carrying hoister 14, and then the coke powder carrying hoister 14 conveys the coke powder to the coke powder carrying bin 15, so that the coke powder carrying is recycled, and the cleanness and tidiness of the working environment are ensured.
In particular, the method also comprises the following steps: the device comprises a standby flue gas treatment device 30 and a standby flue 29, wherein the standby flue gas treatment device 30 is arranged on the standby flue 29, one end of the standby flue 29 is arranged on a first flue gas pipeline 23 between an adsorption reactor 9 and a first electric gate valve 24, the other end of the standby flue 29 is arranged on a second flue gas pipeline 18 between a bag-type dust collector 13 and a draught 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 29; in the invention, under the normal working condition, 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 condition, the second electric gate valve 28 is opened, the first electric gate valve 24 is closed, 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 emission of the purified flue gas into the air is avoided.
The working process is as follows:
(1) adjusting the diameter of a venturi ejector
Through forward rotation lead screw 701, adjusting nut 704 above it moves along lead screw 701 slant upwards, drives two regulation conical heads 706 on the connecting plate 705 and moves to the setting position along the axis of preceding venturi sprayer 6, back venturi sprayer 27 slant upwards respectively to realize that the pipe diameter of preceding venturi sprayer 6, back venturi sprayer 27 diminishes, if need realize that the pipe diameter of preceding venturi sprayer 6, back venturi sprayer 27 is grow, then according to above-mentioned mode counter-rotation lead screw 701 can.
(2) Petroleum coke powder conveying and spraying device
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 feeding ports of the front venturi ejector 6 and the rear venturi ejector 27 through two discharging ports at the lower end of the three-way distributor in an equivalent manner through pipelines, 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 ejector 6 and the rear venturi ejector 27 is ejected 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 and dedusting bag-type 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 content falls into the coke powder carrying screw conveyor 12 below through the slag outlet of the bag-type dust collector 13, the ash content entering the coke powder carrying screw conveyor 12 is transported to the coke powder carrying bin 15 to be collected through the coke powder carrying hoister 14 and can be used as an adsorbent again after subsequent treatment, and recycling is achieved.
(5) Exhaust gas after-treatment
Finally, the flue gas entering the second flue gas pipeline 18 enters the desulfurization treatment device 17 for desulfurization and defogging treatment, and is discharged to the air at high altitude, and during the period, if the bag-type dust collector 13 is abnormal or is in a maintenance state, the standby flue gas treatment device 30 can be started for flue gas treatment, so that the flue gas can still be normally treated and emptied during the maintenance period.
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 spraying, adsorbing and purifying device provided by the invention, the effect is explained by combining a simulation experiment.
Fig. 12 shows a simulation analysis model of flue gas temperature rise and coke powder particle distribution in the adsorption reactor, combining actual working conditions, the low-temperature flue gas temperature being 150 ℃ and the high-temperature flue gas temperature being 800 ℃, and performing a simulation experiment on the particle distribution when the flue gas temperature rise and the petroleum coke powder are sprayed and adsorbed in the spraying and adsorbing device under the condition of determined coke powder spraying amount and spraying speed, wherein 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 breeze particles in the adsorption reactor 9, wherein the blue line represents the low temperature flue gas flow line, the red line represents the high temperature flue gas flow line, and the black pellets represent coke breeze particles; fig. 14 is a diagram showing a distribution of coke breeze particles in the adsorption reactor 9, and blue pellets in fig. 14 indicate coke breeze particles. The low-temperature flue gas enters the adsorption reactor 9 from the left low-temperature flue gas duct 8, the high-temperature flue gas enters the right high-temperature flue gas duct 10 and the petroleum coke powder respectively from the front venturi ejector 6 and the rear venturi ejector 27, and after the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder are shunted and decelerated through the first arc-shaped guide plate 904, the second arc-shaped guide plate 909 and the rectangular guide plate 910, the diffusion effect of the low-temperature flue gas, the high-temperature flue gas and the petroleum coke powder in the adsorption reactor 9 is obvious, the distribution range is wide, the mixing is good, and the injection adsorption requirement is met.
Fig. 15 is a temperature field inside the adsorption reactor, and 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, they are fully mixed, and the temperatures of the upper half portions of the adsorption reactor 9 tend to be consistent.
Fig. 16 is a distribution diagram of the temperature of the flue gas at the outlet of the adsorption reactor, as shown in fig. 16, the maximum temperature of the flue gas after petroleum coke powder injection and adsorption at the outlet of the adsorption reactor 9 is 197 ℃, the minimum temperature is 182 ℃, the average temperature is 190 ℃, and the temperature distribution is reasonable, while the reasonable temperature of the flue gas after petroleum coke powder injection and adsorption before entering the bag-type dust remover is 180-200 ℃, so that the temperature at the outlet of the adsorption reactor 9 meets the temperature requirement of the bag-type dust remover 13 for filtering and dust removal.
Claims (10)
1. The utility model provides an asphalt flue gas fine coke sprays adsorbs purifier which characterized in that includes: a spray adsorption device and a dust removal device;
the spray adsorption device 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);
adsorption reactor (9) includes from top to bottom in proper order: the device comprises a first hollow cuboid (901), a first hollow quadrangular frustum (902), a second hollow cuboid (903) and 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 (8), 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 (10), and an electric regulating valve (11) is arranged on the high-temperature flue (10);
a sewage discharge cover (906) is arranged at the bottom of the second hollow quadrangular frustum pyramid (905);
a feed inlet at the top end of the three-way distributor (4) is communicated with a discharge outlet of the automatic feeding device (3), and 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 pipe diameter adjusting mechanisms (7) are obliquely arranged in the middle positions below the front Venturi ejector (6) and the rear Venturi ejector (27);
the dust removing device comprises: a bag-type dust collector (13), a coke powder-carrying screw conveyor (12) and a desulfurization treatment device (17);
the bag-type dust collector (13) is characterized in that an 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 one-way explosion-proof valve (22), a temperature transmitter (21) and a pressure transmitter (20) from the first hollow cuboid (901) to the bag-type dust collector (13), an air outlet of the bag-type dust collector (13) is communicated with a desulfurization treatment device (17) through a second flue gas pipeline (18), a draught fan (16) is arranged between the second flue gas pipeline (18) and the desulfurization treatment device (17), and an explosion venting device (19) is arranged on an outer side plate of the bag-type dust collector (13);
the coke powder-carrying screw conveyor (12) is arranged at the bottom of the bag-type dust collector (13).
2. The asphalt flue gas coke powder spraying, adsorbing and purifying device according to claim 1, wherein the first hollow quadrangular frustum (902) comprises: the air-conditioning fan comprises a left side wall and a right side wall, wherein the slope of the left side wall is larger than that of the right side wall, a rectangular guide plate (910) is arranged at the position, located above the right side wall, of the top of the second hollow cuboid (903), and a plurality of circular through holes are uniformly formed in the rectangular guide plate (910).
3. The asphalt flue gas coke powder spraying, adsorbing and purifying device as claimed in claim 1, wherein a flame detector and a fire extinguishing system (25) are arranged on the first hollow cuboid (901).
4. The asphalt flue gas coke powder spraying, adsorbing and purifying device according to claim 1, characterized in that the top of the automatic feeding device (3) is provided with a feeding bin (2), one side of the feeding bin (2) is provided with a bucket elevator (1) for conveying the petroleum coke powder to the feeding bin (2), and one side of the automatic feeding device (3) far away from the adsorption reactor (9) is provided with a ladder (5).
5. The pitch flue gas coke powder spraying, adsorbing and purifying device according to claim 1, wherein the included angles between the front venturi ejector (6) and the rear venturi ejector (27) and the horizontal plane are both 30-50 °.
6. The asphalt flue gas coke powder spraying, adsorbing and purifying device according to claim 1, wherein two first arc-shaped guide plates (904) extend from the position where the low-temperature flue gas flue (8) is connected with 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 position where the high-temperature flue gas flue (10) is connected with 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).
7. The asphalt flue gas coke powder spraying, adsorbing and purifying device according to claim 1, wherein the size of the inner cavity of the low-temperature flue gas flue (8) is larger than that of the inner cavity of the high-temperature flue gas flue (10).
8. The asphalt flue gas coke powder spraying, adsorbing and purifying device according to claim 1, wherein the pipe diameter adjusting mechanism (7) comprises: first L type bottom plate (702), second L type bottom plate (703), lead screw (701), adjusting nut (704), two regulation conical heads (706), the inside and outside both sides of adsorption reactor (9) lateral wall are located respectively to first L type bottom plate (702), second L type bottom plate (703), form the semi-closed cuboid, the opening side of semi-closed cuboid is located in lead screw (701), adjusting nut (704) and lead screw (701) threaded connection, in two regulation conical head (706) tip inserted preceding venturi sprayer (6), back venturi sprayer (27) respectively, and should adjust and be connected through connecting plate (705) between conical head (706) and adjusting nut (704).
9. The pitch flue gas coke powder spraying, adsorbing and purifying device according to claim 1, wherein a coke powder carrying bin (15) is arranged at the discharge port side of the coke powder carrying screw conveyor (12), and a coke powder carrying hoister (14) is arranged between the coke powder carrying bin (15) and the coke powder carrying screw conveyor (12).
10. The asphalt flue gas coke powder spraying, adsorbing and purifying device according to claim 1, further comprising: reserve flue gas processing apparatus (30), reserve flue (29), reserve flue gas processing apparatus (30) are located on reserve flue (29), on first flue gas pipeline (23) between adsorption reactor (9) and first electronic flashboard valve (24) are located to reserve flue (29) one end, the other end is located on second flue gas pipeline (18) between sack cleaner (13) and draught fan (16), the position that reserve flue (29) are close to first flue gas pipeline (23) is equipped with electronic flashboard valve of second (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210366927.1A CN114558423A (en) | 2022-04-08 | 2022-04-08 | Pitch flue gas coke powder sprays and adsorbs purifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210366927.1A CN114558423A (en) | 2022-04-08 | 2022-04-08 | Pitch flue gas coke powder sprays and adsorbs purifier |
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| CN114558423A true CN114558423A (en) | 2022-05-31 |
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| CN202210366927.1A Pending CN114558423A (en) | 2022-04-08 | 2022-04-08 | Pitch flue gas coke powder sprays and adsorbs purifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117258442A (en) * | 2023-11-23 | 2023-12-22 | 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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2022
- 2022-04-08 CN CN202210366927.1A patent/CN114558423A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117258442A (en) * | 2023-11-23 | 2023-12-22 | 湖南洁滤环保科技有限公司 | A prevent sticking with paste bag control system for sack cleaner |
| 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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