CN217340739U - A kind of asphalt flue gas coke powder jet adsorption purification device - Google Patents

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

A kind of asphalt flue gas coke powder jet adsorption purification device

【Technical field】

The invention belongs to the technical field of flue gas purification and treatment of calcined petroleum coke, and particularly relates to a device for purifying flue gas by using petroleum coke powder spray adsorption in the process of petroleum coke calcination for carbon products.

【Background technique】

In the calcination process of aluminum carbon products, petroleum coke is usually used as the raw material, and after high temperature calcination, the moisture and volatile matter in the raw material are removed to meet the quality requirements of pre-baked anode products, and a large amount of harmful flue gas will be generated in the process. Therefore, the flue gas must be purified before it is discharged. At present, adsorption, electric capture, washing, incineration, condensation and other methods are often used for purification at home and abroad.

However, in actual industrial production, due to the complexity of the flue gas composition, and with the different production conditions and working environments, the flue gas concentration, temperature, humidity and other parameters in the pipeline will fluctuate greatly, which makes the flue gas purification treatment. bring some difficulties. In addition, no matter one or more of the above methods are used for purification treatment, a large amount of capital is required in the early stage of equipment and flue gas pipeline renovation, and it is difficult to find an appropriate purification method through field tests for a specific production condition. .

In addition, the high-temperature flue gas discharged from the calciner generally needs to be treated at high altitude after denitration, waste heat boiler recycling, flue gas purification, desulfurization, and fog removal. The high-temperature flue gas is recycled into high-humidity and high-viscosity acid and low-temperature flue gas dust after being recycled by the waste heat boiler. The acid and low-temperature flue gas dust is easy to deposit or corrode the purification equipment in the later stage. Operation, it will lead to the decline of equipment function, or even scrapped.

In order to solve the above problems, most enterprises nowadays often use bag filter to purify flue gas, but when the flue gas temperature is too low (lower than the dew point temperature) and the humidity is too high, a large amount of dust will adhere to the surface of the filter bag and block the filter bag. Pores, the phenomenon of condensation "paste bag" occurs. "Paste bag" will make the air permeability of the filter bag drop sharply, and the operating resistance will increase greatly. It needs to be repaired or replaced regularly, which greatly increases the operating cost of the enterprise. Taking the annual production capacity of 500,000 tons of calcined coke as an example, the flue gas flow rate is 300,000 Nm ³ /h. During the flue gas purification treatment, due to the need to repair or replace the bag filter due to the "paste bag", the company will cause direct economic losses every year. as many as millions of dollars.

[Content of the invention]

In view of the above problems, the present invention provides a device for jetting, adsorbing and purifying asphalt flue gas and coke powder, which uses the high-temperature flue gas generated by the calcination system to heat the low-temperature flue gas and petroleum coke powder, and according to the flue gas at the inlet of the bag filter The temperature can automatically adjust the high temperature flue gas flow into the adsorption reactor, and combined with the adjustable jet adsorption device, the fluid is mixed fully and evenly, and the adsorption effect is better. "Paste bag" phenomenon, which greatly prolongs the service life of the bag filter. Therefore, the device has the advantages of good purification effect, high economic benefit, safety and reliability.

The present invention is achieved through the following technical solutions, and provides a device for jetting, adsorbing and purifying asphalt flue gas coke powder, comprising: jetting and adsorbing device and dust-removing device;

The jet adsorption device includes: an adsorption reactor, an automatic feeding device, a three-way distributor, a front venturi injector, and a rear venturi injector;

The adsorption reactor includes sequentially from top to bottom: a first hollow rectangular parallelepiped, a first hollow quadrangular prism, a second hollow rectangular parallelepiped, and a second hollow quadrangular prism;

The top of the first hollow cuboid is closed;

One side of the lower end of the second hollow cuboid is communicated with the exhaust flue of the waste heat boiler through a low-temperature flue gas flue, and the other side is communicated with the exhaust flue of the calcination and denitration treatment device through a high-temperature flue gas flue. There is an electric regulating valve on the gas flue;

The bottom of the second hollow quadrangular platform is provided with a sewage cover;

The top feeding port of the three-way distributor is communicated with the feeding port of the automatic feeding device, and the two feeding ports at the lower end are respectively communicated with the front venturi ejector and the rear venturi ejector through pipes;

The front Venturi injector and the rear Venturi injector are obliquely arranged above the second hollow cuboid, and a pipe diameter adjusting mechanism is inclined in the middle position below the front Venturi injector and the rear Venturi injector;

The dust removal device includes: a bag filter, a coke-loaded powder screw conveyor, and a desulfurization treatment device;

The air inlet of the bag filter is communicated with the first hollow cuboid through a first flue gas pipeline, and the first flue gas pipeline is sequentially provided with a first electric gate valve, a one-way barrier from the first hollow cuboid to the side of the bag filter. Explosion valve, temperature transmitter, pressure transmitter, the air outlet of the bag filter and the desulfurization treatment device are communicated through a second flue gas pipeline, and there is a guide between the second flue gas pipeline and the desulfurization treatment device. a fan, and an explosion venting device is provided on the outer plate of the bag filter;

The coke-carrying powder screw conveyor is arranged at the bottom of the bag filter.

In particular, the first hollow quadrangular prism includes a left side wall and a right side wall, the slope of the left side wall is larger than that of the right side wall, and the top of the second hollow cuboid is located above the right side wall. A rectangular guide plate is arranged at the position, and a plurality of circular through holes are evenly opened on 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 the petroleum coke powder to the feeding bin, and the automatic feeding device is far away from the adsorption reaction There is a ladder on one side of the device.

Particularly, the included angles between the front venturi injector and the rear venturi injector and the horizontal plane are both 30-50°.

In particular, two first arc-shaped baffles extend from the position where the low-temperature flue gas flue is connected to the second hollow cuboid, and the two first arc-shaped baffles are respectively arranged on the lower part of the low-temperature flue gas flue. On the upper and lower sides, two second arc-shaped baffles extend from the position where the high-temperature flue gas flue is connected to the second hollow cuboid, and the two second arc-shaped baffles are respectively arranged on the high-temperature flue gas flue. The upper and lower sides of the first arc-shaped guide plate and the second arc-shaped guide plate are evenly provided with a plurality of waist-shaped through holes.

In particular, the inner cavity size of the low temperature flue gas flue is larger than that of the high temperature flue gas flue.

In particular, the pipe diameter adjustment mechanism includes: a first L-shaped bottom plate, a second L-shaped bottom plate, a screw rod, an adjusting nut, and two adjusting cone heads, and the first L-shaped bottom plate and the second L-shaped bottom plate are respectively provided with A semi-closed cuboid is formed on the inner and outer sides of the side wall of the adsorption reactor, the screw rod is arranged on the open side of the semi-closed cuboid, the adjusting nut is threadedly connected with the screw rod, and the ends of the two adjusting cone heads are respectively inserted before Inside the venturi injector and the rear venturi injector, and the adjusting cone head and the adjusting nut are connected by a connecting plate.

In particular, a coke-loaded powder silo is provided on the discharge port side of the coke-loaded powder screw conveyor, and a coke-loaded powder elevator is arranged between the coke-loaded powder bin and the coke-loaded powder screw conveyor.

In particular, it also includes: a spare flue gas treatment device and a spare flue, the spare flue gas treatment device is arranged on the spare flue, and one end of the spare flue is arranged between the adsorption reactor and the first electric gate valve. On the first flue gas pipe, the other end is set on the second flue gas pipe between the bag filter and the induced draft fan, and the standby flue is provided with a second electric gate valve at a position close to the first flue gas pipe.

Compared with the prior art, the asphalt flue gas coke powder spray adsorption purification device provided by the present invention has the following beneficial effects:

(1) The system heat source after calcination and denitrification is used to automatically adjust the flue gas temperature to reduce the occurrence of bag sticking.

Set high temperature flue gas flue and electric regulating valve, according to the temperature of flue gas after injection adsorption, automatically adjust the flow rate of high temperature flue gas entering the adsorption reactor to ensure that the temperature of flue gas after injection adsorption before entering the bag filter is 180- Between 200 ℃, it can reduce the moisture in the flue gas and reduce the occurrence of the phenomenon of sticking.

(2) Using an adjustable jet adsorption device, the jet adsorption effect is good.

The bucket elevator conveying system that can automatically adjust the conveying amount of petroleum coke powder according to the effect of injection adsorption, two sets of venturi ejectors with symmetrical front and rear, and the ejection pipes are arranged inclined downward, and the pipe diameter of the front and rear venturi ejectors is adjusted simultaneously. The pipe diameter adjustment mechanism, combined with the structure of multiple guide plates set in the adsorption reactor, ensures that the high-temperature flue gas, low-temperature flue gas and petroleum coke powder are mixed evenly in the adsorption reactor, the adsorption is sufficient, and the purification effect is good.

(3) The adsorption raw materials are obtained locally and recycled, and the economic benefits are good.

It is mainly used in the purification of flue gas in the production process of calcined petroleum coke. The calcined petroleum coke product is used as the adsorption material of the jet adsorption purification device after drying, refining and screening, and the material is obtained locally to save costs; , the coke-loaded powder after jet adsorption can be used as the adsorption material of jet adsorption purification device again after recycling, so as to realize recycling and good economic benefits.

(4) Multi-stage fire extinguishing and explosion-proof devices are set up, and the system is safe and reliable.

The flame detector and fire extinguishing system installed on the upper part of the adsorption reactor, the one-way explosion-proof valve near the inlet of the bag filter, and the explosion venting device evenly distributed on the outer plate of the bag filter ensure that the entire device is stable under safe and reliable conditions. run.

【Description of drawings】

Fig. 1 is the working flow chart of the present invention;

Fig. 2 is the front view of a kind of pitch flue gas coke powder spray adsorption purification device of the present invention;

Fig. 3 is a top view of a kind of pitch flue gas coke powder jet adsorption and purification device of the present invention;

4 is a front view of an asphalt flue gas coke powder jet adsorption and purification device of the present invention without a bucket elevator, a ladder, and an overhaul operation platform;

5 is a top view of an asphalt flue gas coke powder jet adsorption and purification device of the present invention without a bucket elevator, a ladder, and an overhaul operation platform;

6 is a partial cross-sectional view of an adsorption reactor in a jetting adsorption purification device for asphalt flue gas coke powder according to the present invention;

7 is an expanded view of a first arc-shaped deflector in an asphalt flue gas coke powder jet adsorption purification device according to the present invention;

8 is a front view of a jet adsorption device in a jetting adsorption purification device for asphalt flue gas coke powder according to the present invention;

9 is a top view of a jet adsorption device in a jetting adsorption purification device for asphalt flue gas coke powder according to the present invention;

Fig. 10 is a partial enlarged view at I of Fig. 8 of the present invention;

Figure 11 is a sectional view at A-A of Figure 10;

Fig. 12 is a simulation analysis model of the temperature rise of flue gas and the distribution of coke powder particles in the adsorption reactor of the present invention.

In the drawings, 1- bucket elevator, 2- feed bin, 3- automatic feeding device, 4- three-way distributor, 5- climbing ladder, 6- front venturi ejector, 7- pipe diameter adjustment mechanism , 701-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 reaction device, 901-first hollow cuboid, 902-first hollow quadrangle, 903-second hollow cuboid, 904-first arc baffle, 905-second hollow quadrangle, 906-drain cover, 907 -Waist-shaped through hole, 908-support rod, 909-second arc deflector, 910-rectangular deflector, 10-high temperature flue gas flue, 11-electric regulating valve, 12-coke powder screw conveyor , 13-bag dust collector, 14-coke-loaded powder elevator, 15-coke-loaded powder silo, 16-induced fan, 17-desulfurization treatment device, 18-second flue gas pipeline, 19-explosion venting device, 20- Pressure transmitter, 21-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 injector, 28-second electric gate valve, 29-spare flue, 30-spare flue gas treatment device.

【Detailed ways】

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Please refer to Fig. 1-Fig. 11 , the present invention provides a device for jetting, adsorbing and purifying asphalt flue gas coke powder, which is characterized in that it includes: jetting adsorption device and dust removing device;

The jet adsorption device includes: adsorption reactor 9, automatic feeding device 3, three-way distributor 4, front venturi injector 6, rear venturi injector 27;

The adsorption reactor 9 sequentially includes from top to bottom: a first hollow rectangular parallelepiped 901 , a first hollow rectangular parallelepiped 902 , a second hollow rectangular parallelepiped 903 , and a second hollow rectangular parallelepiped 905 ;

The top of the first hollow cuboid 901 is closed;

One side of the lower end of the second hollow cuboid 903 is communicated with the exhaust flue of the waste heat boiler through the low-temperature flue gas flue 8, and the other side is communicated with the exhaust flue of the calcination and denitration treatment device through the high-temperature flue gas flue 10, so The high-temperature flue gas flue 10 is provided with an electric regulating valve 11, which can control the flow rate of the high-temperature flue gas entering the adsorption reactor 9 to ensure the temperature of the flue gas after injection and adsorption before entering the bag filter 13. Between 180-200 ℃, reduce the occurrence of sticking bags;

The bottom of the second hollow quadrangular platform 905 is provided with a sewage cover 906;

The feeding port at the top of the three-way distributor 4 is communicated with the feeding port of the automatic feeding device 3, and the two feeding ports at the lower end are respectively communicated with the front venturi injector 6 and the rear venturi injector 27 through pipes;

The front venturi injector 6 and the rear venturi injector 27 are inclined above the second hollow cuboid 903, and the middle position below the front venturi injector 6 and the rear venturi injector 27 is inclined and provided with a pipe diameter adjustment Institution 7;

The dust removal device includes: a bag filter 13, a coke-loaded powder screw conveyor 12, and a desulfurization treatment device 17;

The air inlet of the bag filter 13 is communicated with the first hollow cuboid 901 through the first flue gas duct 23, and the first flue gas duct 23 is sequentially provided with a first electric brake from the first hollow cuboid 901 to the bag filter 13 side. Plate valve 24, one-way explosion-proof valve 22, temperature transmitter 21, pressure transmitter 20, the air outlet of the bag filter 13 and the desulfurization treatment device 17 are communicated through the second flue gas pipeline 18, and the first An induced draft fan 16 is provided between the second flue gas pipeline 18 and the desulfurization treatment device 17. The temperature transmitter 21 and the pressure transmitter 20 are used to measure and control the pressure and temperature parameters of the flue gas before entering the bag filter 13. An explosion venting device 19 is provided on the outer plate of the bag filter 13 , and the explosion venting device 19 is arranged on the side of the bag filter 13 away from the crowded area.

The coke-carrying powder screw conveyor 12 is arranged at the bottom of the bag filter 13 .

In particular, since most of the high-temperature flue gas after denitrification in the calciner is recycled into low-temperature flue gas by the waste heat boiler, the low-temperature flue gas enters the adsorption reactor 9 from the low-temperature flue gas flue 8, while a small part is electrically The high-temperature flue gas divided by the regulating valve 11 enters the adsorption reactor 9 through the high-temperature flue gas flue 10 for heating, and the low-temperature flue gas entering the adsorption reactor 9 has a large flow rate and a large speed. , high temperature flue gas and petroleum coke powder are fully mixed in the adsorption reactor 9, and the first hollow quadrangular platform 902 includes: a left side wall and a right side wall, and the slope of the left side wall is higher than that of the right side wall. That is, the left and right sides of the first hollow quadrangular platform 902 are asymmetrical, the slope of the left side wall on the same side as the low temperature flue gas flue 8 is relatively large, and the slope of the right side wall on the same side as the high temperature flue gas flue 10 is relatively large. In this way, the low-temperature flue gas, high-temperature flue gas and petroleum coke powder can be mixed more uniformly in the adsorption reactor 9; in the present invention, the top of the second hollow cuboid 903 is located above the right side wall. The flow plate 910, a plurality of circular through holes (not shown in the figure) are evenly opened on the rectangular guide plate 910, so that the flow can be divided and the flow rate can be reduced, so that the low temperature flue gas, high temperature flue gas and petroleum coke The powder is mixed 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 respectively, as shown in FIG. 6 .

In particular, since high temperature smoke may cause fire, the first hollow cuboid 901 is provided with a flame detector and a fire extinguishing system 25. In the present invention, when the flame detector detects an ignition source, the fire extinguishing system is automatically activated Sprinkling water to put out fires, while signalling devices use sirens and flashing lights to give alarms, with high safety.

In particular, the top of the automatic feeding device 3 is provided with a feeding bin 2, and one side of the feeding bin 2 is provided with a bucket elevator 1 for conveying petroleum coke powder to the feeding bin 2, and the automatic feeding The side of the device 3 away from the adsorption reactor 9 is provided with a ladder 5; in the present invention, the bucket elevator 1 is used to transport the petroleum coke powder to the feed bin 2, and can increase or Reduce the conveying amount of petroleum coke powder, and provide stable adsorption material for the jet adsorption device.

In particular, the included angles between the front venturi injector 6 and the rear venturi injector 27 and the horizontal plane are both 30-50°. In the present invention, the front venturi injector 6 and the rear venturi injector 27 It is related to the included angle of the horizontal plane, the amount of flue gas, and the volume of the adsorption reactor 9. The larger the amount of flue gas and the volume of the adsorption reactor 9, the larger the included angle, and vice versa.

In particular, two first arc-shaped baffles 904 extend from the position where the low-temperature flue gas flue 8 is connected to the second hollow cuboid 903 , and the two first arc-shaped baffles 904 are respectively arranged on the low-temperature smoke. On the upper and lower sides of the gas flue 8, two second arc-shaped baffles 909 extend from the position where the high-temperature flue gas flue 10 is connected to the second hollow cuboid 903. The two second arc-shaped baffles 909 are respectively arranged on the upper and lower sides of the high-temperature flue gas flue 10, and a plurality of waist-shaped through holes 907 are evenly opened on the first arc-shaped baffle plate 904 and the second arc-shaped baffle plate 909; in the present invention, The first arc-shaped deflector 904, the second arc-shaped deflector 909 and the waist-shaped through hole 907 can further serve the purpose of dividing the flow and reducing the flow rate, so that the low-temperature flue gas, high-temperature flue gas and petroleum coke powder can be absorbed. The mixing is more uniform, and the expanded structure of the second arc deflector 909 and the first arc deflector 904 is the same, as shown in FIG. 7 , in practical application, the size can be adjusted according to actual needs.

In particular, the cavity size of the low-temperature flue gas flue 8 is larger than that of the high-temperature flue gas flue 10 . Combined with the electric control valve 11 , the incoming volume of the high-temperature flue gas can be adjusted and controlled, so that the low-temperature flue gas can be adjusted and controlled. The temperature of the flue gas after mixing with the high temperature flue gas is 180-200°C, which ensures that the temperature of the flue gas entering the bag filter 13 is slightly higher than the dew point temperature of the flue gas, and effectively avoids the "paste bag" produced when the bag filter 13 purifies the flue gas. ” phenomenon, which greatly prolongs the service life of the bag filter 13.

In particular, the pipe diameter adjusting mechanism 7 includes: 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 cone heads 706. The first L-shaped bottom plate 702, The second L-shaped bottom plate 703 is respectively arranged on the inner and outer sides of the side wall of the adsorption reactor 9 to form a semi-closed cuboid. The screw rod 701 is arranged on the open side of the semi-closed cuboid, and the adjusting nut 704 is threadedly connected with the screw rod 701. The ends of the two adjusting cone heads 706 are respectively inserted into the front Venturi injector 6 and the rear Venturi injector 27, and the adjusting cone heads 706 and the adjusting nut 704 are connected through a connecting plate 705; The screw rod 701 is rotated forward, and the adjusting nut 704 above it moves obliquely upward along the screw rod 701, driving the two adjusting cone heads 706 on the connecting plate 705 along the front venturi injector 6 and the rear venturi injector 27 respectively. The axis of the Venturi moves obliquely upward to the set position, so that the pipe diameters of the front Venturi injector 6 and the rear Venturi injector 27 are reduced. If it becomes larger, the screw 701 can be reversely rotated in the above-mentioned manner.

In particular, in order to facilitate the recovery of the coke-loaded powder, the coke-loaded powder silo 15 is provided on the side of the discharge port of the coke-loaded powder screw conveyor 12 , and the coke-loaded powder bin 15 and the coke-loaded powder screw conveyor 12 are arranged between the coke-loaded powder bin 15 and the coke-loaded powder screw conveyor 12 A coke-carrying powder elevator 14 is provided; in this way, during operation, the coke-carrying powder screw conveyor 12 transports the coke-carrying powder into the coke-carrying powder elevator 14, and then the coke-carrying powder elevator 14 transports the coke-carrying powder to the coke-carrying powder elevator 14. In the powder silo 15, the recovery and reuse of the coke-loaded powder is completed, and the working environment is kept clean and tidy.

In particular, it also includes: a spare flue gas treatment device 30 and a spare flue 29, the spare flue gas treatment device 30 is arranged on the spare flue 29, and one end of the spare flue 29 is arranged between the adsorption reactor 9 and the first flue. On the first flue gas duct 23 between the electric gate valves 24, the other end is set on the second flue gas duct 18 between the bag filter 13 and the induced draft fan 16, and the spare flue 29 is close to the first flue gas The position of the pipeline 23 is provided with the second electric gate valve 28; in the present invention, in the normal working state, the second electric gate valve 28 is closed, and the first electric gate valve 24 is opened, when the bag filter 13 is abnormal Or in the maintenance state, the second electric gate valve 28 is opened, and the first electric gate valve 24 is closed. At this time, the flue gas is purified by the standby flue gas treatment device 30, and the purified flue gas passes through the desulfurization treatment device. 17 Desulfurization treatment is carried out to avoid being discharged into the air and causing air pollution.

work process:

(1) Adjust the diameter of the venturi injector

By rotating the screw rod 701 in the forward direction, the adjusting nut 704 above it moves obliquely upward along the screw rod 701, and drives the two adjusting cone heads 706 on the connecting plate 705 along the front Venturi injector 6 and the rear Venturi injector respectively. The axis of 27 moves obliquely upward to the set position, so that the pipe diameters of the front venturi injector 6 and the rear venturi injector 27 are reduced. If the diameter becomes larger, the screw 701 can be reversely rotated in the above-mentioned manner.

(2) Petroleum coke powder conveying and jetting

Next, the bucket elevator 1 transports the petroleum coke powder to the feeding bin 2, and the petroleum coke powder in the feeding bin 2 enters the three-way distributor 4 through the automatic feeding device 3, and the The petroleum coke powder enters the feeding ports of the front venturi injector 6 and the rear venturi injector 27 through the two discharge ports at the lower end of the same amount through the pipeline, so as to realize the delivery and injection of the petroleum coke powder.

(3) Jet adsorption and purification of flue gas

Next, the petroleum coke powder entering the cavity of the front venturi injector 6 and the rear venturi injector 27 is injected into the adsorption reactor 9, and the low-temperature flue gas conveyed by the low-temperature flue gas flue 8 in the adsorption reactor 9 After the high temperature flue gas conveyed by the high temperature flue gas flue 10 is fully mixed and adsorbed, the mixed flue gas dust rises to the upper part of the adsorption reactor 9 and enters the first flue gas pipeline 23 .

(4) Filter and dust removal by bag filter

Next, the mixed flue gas dust enters the bag filter 13 under the action of negative pressure through the air inlet of the bag filter 13 for filtering and dust removal, and the purified gas enters the second flue gas pipeline 18 through the air outlet of the bag filter 13, and the ash content Through the slag outlet of the bag filter 13, it falls into the coke-loaded powder screw conveyor 12 below, and the ash entering the coke-loaded powder screw conveyor 12 is transported to the coke-loaded powder silo 15 through the coke-loaded powder elevator 14 for collection. , after subsequent treatment, it can be used as an adsorbent again to realize recycling.

(5) Evacuation of flue gas after treatment

Finally, the flue gas entering the second flue gas pipeline 18 enters the desulfurization treatment device 17 for desulfurization and demisting treatment, and then is discharged into the air at a high altitude. During the period, if the bag filter 13 is abnormal or in the maintenance state, the standby flue gas can be activated. The treatment device 30 performs flue gas treatment to ensure that during the maintenance period, the flue gas can still be processed and evacuated normally.

In practical application, the adsorbent used in the jet adsorption purification device provided by the present invention can also use activated carbon, fly ash and the like.

In order to verify the effect of the asphalt flue gas coke powder jet adsorption and purification device provided by the present invention, the effect is explained below in combination with a simulation experiment.

Figure 12 shows the simulation analysis model of flue gas temperature rise and coke powder particle distribution in the adsorption reactor. Combined with the actual working conditions, the low temperature flue gas temperature is 150 °C and the high temperature flue gas temperature is 800 °C. The simulation experiment was carried out on the particle distribution of the flue gas heating in the jet adsorption device and the jet adsorption of petroleum coke powder under the condition of the injection speed and the injection speed.

It can be seen from the simulation experiment that the low temperature flue gas enters the adsorption 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 enters the adsorption from the front venturi injector 6 and the rear venturi injector 27 respectively. In the reactor 9, after passing through the first arc deflector 904, the second arc deflector 909 and the rectangular deflector 910, the flow is divided and the speed is reduced, the low temperature flue gas, high temperature flue gas and petroleum coke powder are adsorbed in the reactor. 9 The internal diffusion effect is obvious, the distribution range is wide, and the mixing is good, which meets the requirements of jet adsorption.

When the low temperature flue gas, high temperature flue gas and petroleum coke powder enter the adsorption reactor 9 and undergo heat exchange, they are fully mixed, and the temperature in the upper half of the adsorption reactor 9 tends to be the same.

The maximum temperature of the flue gas after the jet adsorption of petroleum coke powder at the outlet of the adsorption reactor 9 is 197 °C, the minimum temperature is 182 °C, the average temperature is 190 °C, and the temperature distribution is reasonable. The reasonable temperature before the bag filter is 180-200°C. It can be seen that the temperature at the outlet of the adsorption reactor 9 meets the temperature requirement of the bag filter 13 for filtering and dedusting.

Claims (10)

1. an asphalt flue gas coke powder jet adsorption purification device, is characterized in that, comprises: jet adsorption device, dust removal device; The jet adsorption device comprises: an adsorption reactor (9), an automatic feeding device (3), a three-way distributor (4), a front venturi injector (6), and a rear venturi injector (27); The adsorption reactor (9) sequentially includes from top to bottom: a first hollow rectangular parallelepiped (901), a first hollow quadrangular prism (902), a second hollow rectangular parallelepiped (903), and a second hollow quadrangular prism (905) ; The top of the first hollow cuboid (901) is closed; One side of the lower end of the second hollow cuboid (903) is communicated with the exhaust flue of the waste heat boiler through the low-temperature flue gas flue (8), and the other side is connected to the exhaust flue of the calcination and denitration treatment device through the high-temperature flue gas flue (10). The gas flue is connected, and an electric regulating valve (11) is arranged on the high temperature flue gas flue (10); The bottom of the second hollow quadrangular platform (905) is provided with a sewage cover (906); The feed port at the top of the three-way distributor (4) is communicated with the discharge port of the automatic feeding device (3), and the two discharge ports at the lower end are respectively connected to the front venturi injector (6) and the rear venturi injector through pipes. The device (27) is connected; The front venturi injector (6) and the rear venturi injector (27) are obliquely arranged above the second hollow cuboid (903), and the front venturi injector (6) and the rear venturi injector (27) ) the lower middle position is inclined with a pipe diameter adjusting mechanism (7); The dust removal device comprises: a bag filter (13), a coke-loaded powder screw conveyor (12), and a desulfurization treatment device (17); The air inlet of the bag filter (13) is communicated with the first hollow cuboid (901) through a first flue gas duct (23), and the first flue gas duct (23) extends from the first hollow cuboid (901) to the bag dust collector A first electric gate valve (24), a one-way explosion-proof valve (22), a temperature transmitter (21), and a pressure transmitter (20) are arranged on the side of the filter (13) in sequence. The bag filter (13) ) The air outlet and the desulfurization treatment device (17) are communicated through a second flue gas pipeline (18), and an induced draft fan (16) is arranged between the second flue gas pipeline (18) and the desulfurization treatment device (17), so An explosion venting device (19) is provided on the outer plate of the bag filter (13); The coke powder screw conveyor (12) is arranged at the bottom of the bag filter (13). 2. The asphalt flue gas coke powder jet adsorption and purification device according to claim 1, wherein the first hollow quadrangular platform (902) comprises: a left side wall, a right side wall, the left side wall The inclination of the wall is larger than the inclination of the right side wall, and a rectangular baffle (910) is provided on the top of the second hollow cuboid (903) above the right side wall, and the rectangular baffle (910) is evenly A number of circular through holes are opened. 3 . The device according to claim 1 , wherein the first hollow cuboid ( 901 ) is provided with a flame detector and a fire extinguishing system ( 25 ). 4 . 4. The asphalt flue gas coke powder jet adsorption and purification device according to claim 1, characterized in that, the top of the automatic feeding device (3) is provided with a feeding bin (2), and the feeding bin (2) ) is provided with a bucket elevator (1) for transporting petroleum coke powder to the feeding bin (2) on one side, and the side of the automatic feeding device (3) away from the adsorption reactor (9) is provided with a ladder (5). 5. A kind of pitch flue gas coke powder injection adsorption purification device according to claim 1, is characterized in that, the clip between described front venturi injector (6) and rear venturi injector (27) and the horizontal plane The angles are all 30-50°. 6 . The asphalt flue gas coke powder jet adsorption and purification device according to claim 1 , wherein two positions extend from the position where the low-temperature flue gas flue ( 8 ) is connected with the second hollow cuboid ( 903 ). 7 . A first arc-shaped guide plate (904), the two first arc-shaped guide plates (904) are respectively arranged on the upper and lower sides of the low-temperature flue gas flue (8), and the high-temperature flue gas flue (10) ) and the second hollow cuboid (903) are connected with two second arc-shaped baffles (909) extending out, and the two second arc-shaped baffles (909) are respectively arranged in the high-temperature flue gas flue (909). 10) on the upper and lower sides of the first arc-shaped guide plate (904) and the second arc-shaped guide plate (909), a plurality of waist-shaped through holes (907) are evenly opened. 7. The asphalt flue gas coke powder jet adsorption and purification device according to claim 1, characterized in that the inner cavity size of the low temperature flue gas flue (8) is higher than that of the high temperature flue gas flue (10). Large cavity size. 8. The asphalt flue gas coke powder spray adsorption and purification device according to claim 1, wherein the pipe diameter adjustment mechanism (7) comprises: a first L-shaped bottom plate (702), a second L-shaped bottom plate (703), screw (701), adjusting nut (704), two adjusting cones (706), the first L-shaped bottom plate (702) and the second L-shaped bottom plate (703) are respectively provided in the adsorption reactor (9) The inner and outer sides of the side wall form a semi-closed cuboid, the screw rod (701) is arranged on the open side of the semi-closed cuboid, the adjusting nut (704) is threadedly connected with the screw rod (701), and the two The ends of the adjusting cone (706) are respectively inserted into the front venturi injector (6) and the rear venturi injector (27), and a connecting plate (705) passes between the adjusting cone (706) and the adjusting nut (704). )connect. 9 . The asphalt flue gas coke powder jet adsorption and purification device according to claim 1 , wherein a coke-loaded powder silo (15) is provided at the discharge port side of the coke-loaded powder screw conveyor (12). 10 . A coke-loaded powder elevator (14) is arranged between the coke-loaded powder silo (15) and the coke-loaded powder screw conveyor (12). 10 . The asphalt flue gas coke powder jet adsorption and purification device according to claim 1 , further comprising: a spare flue gas treatment device (30) and a spare flue (29), the spare flue gas treatment device (30) 10 . The device (30) is arranged on the standby flue (29), and one end of the standby flue (29) is arranged in the first flue gas pipe (2) between the adsorption reactor (9) and the first electric gate valve (24). 23), the other end is set on the second flue gas duct (18) between the bag filter (13) and the induced draft fan (16), and the spare flue (29) is close to the first flue gas duct (23) A second electric gate valve (28) is provided at the position.

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