CN216572349U

CN216572349U - Toxic gas recovery device for boiler flue gas denitration

Info

Publication number: CN216572349U
Application number: CN202122530446.3U
Authority: CN
Inventors: 王刚; 徐德勤; 马湘钧; 王晓东; 刘注显; 王喆; 王卓; 吕蒙
Original assignee: Dalian Power Plant of Huaneng International Power Co Ltd
Current assignee: Dalian Power Plant of Huaneng International Power Co Ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-05-24
Anticipated expiration: 2031-10-20

Abstract

The utility model provides a toxic gas recovery device for denitration of boiler flue gas, which comprises two absorption tanks and a temporary storage tank, wherein a first pipeline and a second pipeline are connected between the upper ends of the two absorption tanks, one side of each of the first pipeline and the second pipeline, which is opposite to each other, is respectively connected with a feeding pipe and a discharging pipe, the discharging pipe is connected with the temporary storage tank, the two sides of the feeding pipe are respectively provided with a first valve and a second valve, the two sides of the discharging pipe are respectively provided with a third valve and a fourth valve, and one side of each of the third valve and the fourth valve, which is opposite to each other, is provided with an activated carbon adsorption plate; the temporary storage box upper end is connected with the forced draught fan, and temporary storage box both sides are equipped with the algae bucket respectively, and the forced draught fan output is connected with two pipes, all installs the fifth valve on every pipe, and every algae bucket upper end all is equipped with butt joint pipe, butt joint pipe and pipe butt joint. When the liquid medicine and the activated carbon adsorption plate are replaced, the device does not need to be stopped, the working efficiency is not influenced, and the absorption effect can be improved through the pressurizing fan and the algae barrel.

Description

Toxic gas recovery device for boiler flue gas denitration

Technical Field

The utility model mainly relates to the technical field of flue gas treatment of power plants, in particular to a toxic gas recovery device for denitration of boiler flue gas.

Background

The importance of the process of removing nitrogen oxides from combustion fumes to prevent environmental pollution has been sharply proposed as a worldwide problem. The mainstream processes in the world include: SCR and SNCR. These two processes are not very different except that the reaction temperature is lower than SNCR due to the use of catalyst for SCR, but the SCR investment is at least several times, even more than 10 times, the SNCR investment if both from the point of view of construction costs and operating costs. In order to prevent the environment pollution caused by excessive NOx generated after the coal in the boiler is combusted, the coal is subjected to denitration treatment.

For example, application number is CN 201720452662.1's patent application, including the boiler joint that connects gradually, inside is equipped with the gas acceleration case of fan blade, the gas flow tube, the liquid reserve pipe, inside is provided with adsorption tank and the blast pipe of a plurality of active carbon adsorption tanks, the base is located the adsorption tank below and is fixed with adsorption tank and gas acceleration case respectively, be fixed with the motor that is used for driving the fan blade on the gas acceleration case, the liquid reserve pipe upper end is connected with the feed liquor pipe, the liquid reserve pipe lower extreme is connected with the fluid-discharge tube, be provided with the observation window on the liquid reserve pipe, the last mark of observation window has the liquid level scale, it is fixed through recess projection joint between active carbon adsorption tank and the adsorption tank, still be equipped with the gas tightness strip of paper used for sealing between active carbon adsorption tank and the adsorption tank. Although the ability of handling toxic gas is strong, when changing liquid medicine and active carbon adsorption board at every turn, all need the stop device motion, change, lead to work efficiency to descend, the practicality is lower to can not effectively carry out the poison gas and collect.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides a toxic gas recovery device for denitration of boiler flue gas, which is used for solving the technical problems in the background technology.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a toxic gas recovery device for denitration of boiler flue gas comprises two absorption boxes and a temporary storage box, wherein a first pipeline and a second pipeline are connected between the upper ends of the two absorption boxes, the two ends of the first pipeline extend to the lower ends of the two absorption boxes respectively, the middle ends of the opposite sides of the first pipeline and the second pipeline are connected with a feed pipe and a discharge pipe respectively, the discharge pipe is connected with the temporary storage box, a first valve and a second valve which are positioned on the first pipeline are arranged on the two sides of the feed pipe respectively, a third valve and a fourth valve which are positioned on the second pipeline are arranged on the two sides of the discharge pipe respectively, and an activated carbon adsorption plate is arranged on the opposite side of the third valve and the fourth valve; the temporary storage box upper end is connected with the forced draught fan, temporary storage box both sides are equipped with the algae bucket respectively, the forced draught fan output is connected with two pipes, every all install the fifth valve on the pipe, every algae bucket upper end all is equipped with the butt joint pipe, butt joint pipe and pipe butt joint.

Preferably, an air inlet fan and an exhaust fan are respectively installed on the feeding pipe and the discharging pipe.

Preferably, the upper end and the lower end of each absorption box are respectively provided with a feed valve and a discharge valve.

Preferably, every all install rabbling mechanism on the absorption box, rabbling mechanism includes the motor, the motor output end is connected with the pivot, install a plurality of stirring thick liquids in the pivot.

Preferably, the upper end of the activated carbon adsorption plate is provided with a connecting plate, and the connecting plate is arranged on the second pipeline through a screw rod.

Preferably, a sealing ring is connected to the inside of the connecting plate.

Preferably, the butt joint pipe and the guide pipe are both sleeved with sealing ring plates, and the two sealing ring plates are connected through bolts.

Compared with the prior art, the utility model has the beneficial effects that:

when the device is used, the first valve and the third valve are opened, toxic gas enters one absorption box through the first pipeline, so that the toxic gas is contacted with the adsorption liquid, then the toxic gas enters the temporary storage box through the second pipeline, when the absorption liquid and the activated carbon adsorption plate need to be replaced, the first valve and the third valve are closed, the second valve and the fourth valve are opened, the toxic gas can enter the other gas path channel, and at the moment, the absorption liquid and the activated carbon adsorption plate can be replaced without stopping the operation of the device, so that the effective operation of the device is ensured, and the working efficiency is improved; the absorption effect is improved through double absorption of the absorption liquid and the activated carbon absorption plate, the toxic gas in the temporary storage box is pressurized and pumped into the algae barrel by the pressurizing fan, the toxic gas is further purified, the algae barrel is used for cultivating the chlorella by a plant factory mode technology, the toxic gas is fully absorbed and converted by the chlorella, and the absorption effect and the practicability are improved; the motor is started to rotate the rotating shaft and drive the stirring paddle to rotate, so that the absorption liquid in the absorption box flows rapidly, the adsorption on toxic gas is improved, the complete use of the absorption liquid is ensured, and the resource waste is avoided; when the interior of the algae barrel is fully absorbed, the opened fifth valve is closed, and the other fifth valve is opened, so that the effective movement of the device is ensured.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an enlarged view of the present invention at A;

FIG. 3 is a perspective view of the connecting plate of the present invention;

FIG. 4 is an enlarged view of the utility model at B;

FIG. 5 is a schematic view showing the internal structure of the absorption tank of the present invention.

In the figure: 1. an absorption tank; 11. a feed valve; 12. a discharge valve; 2. a temporary storage box; 21. a booster fan; 22. an algae bucket; 23. a conduit; 24. a fifth valve; 25. butt-joint pipes; 26. a seal ring plate; 27. a bolt; 3. a first conduit; 31. a feed pipe; 32. an air inlet machine; 33. a first valve; 34. a second valve; 4. a second conduit; 41. a discharge pipe; 42. an exhaust fan; 43. a third valve; 44. a fourth valve; 45. sealing the ring; 46. a connecting plate; 47. a screw; 5. a stirring mechanism; 51. a motor; 52. a rotating shaft; 53. and (4) stirring the slurry.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the utility model are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 5, the present invention provides a technical solution: a poisonous gas recovery device for denitration of boiler flue gas comprises two absorption boxes 1 and a temporary storage box 2, wherein a feed valve 11 and a discharge valve 12 are respectively installed at the upper end and the lower end of each absorption box 1, absorption liquid for treating main poisonous sulfide in the flue gas can be injected into the absorption boxes 1 through the feed valve 11, the absorption liquid used at the position can be selected according to corresponding equipment, such as methanol, propylene carbonate, polyethylene glycol dimethyl ether and the like, the discharge valve 12 can discharge the used absorption liquid, a first pipeline 3 and a second pipeline 4 are connected between the upper ends of the two absorption boxes 1, two ends of the first pipeline 3 respectively extend to the lower ends of the interiors of the two absorption boxes 1, the middle ends of the opposite sides of the first pipeline 3 and the second pipeline 4 are respectively connected with a feed pipe 31 and a discharge pipe 41, an air inlet fan 32 and an exhaust fan 42 are respectively installed on the feed pipe 31 and the discharge pipe 41, the air inlet fan 32 and the air outlet fan 42 can ensure the flow of gas, the discharge pipe 41 is connected with the temporary storage tank 2, the two sides of the feed pipe 31 are respectively provided with a first valve 33 and a second valve 34 which are positioned on the first pipeline 3, and the two sides of the discharge pipe 41 are respectively provided with a third valve 43 and a fourth valve 44 which are positioned on the second pipeline 4.

Referring to fig. 1-3 again, an activated carbon adsorption plate is disposed on the opposite side of the third valve 43 and the fourth valve 44, the activated carbon adsorption plate is not shown in the figure, a connection plate 46 is disposed at the upper end of the activated carbon adsorption plate, the connection plate 46 is mounted on the second pipeline 4 through a screw 47, and a sealing ring 45 is connected inside the connection plate 46. The screw rod 47 is screwed out, the connecting plate 46 is taken down, the activated carbon adsorption plate can be replaced, the sealing ring 45 can ensure the sealing performance of the connecting plate 46 after installation, and the effective use of the device is ensured.

Please refer to fig. 1 and 5 again, each of the absorption boxes 1 is provided with a stirring mechanism 5, the stirring mechanism 5 includes a motor 51, an output end of the motor 51 is connected with a rotating shaft 52, and the rotating shaft 52 is provided with a plurality of stirring paddles 53. Through starter motor 51 for pivot 52 is rotatory, drives stirring paddle 53 and rotates, makes the inside absorption liquid of absorption box 1 flow fast, can improve the adsorptivity to toxic gas, guarantees the complete use of absorption liquid, avoids the wasting of resources.

Please refer to fig. 1 and 4, the upper end of the temporary storage box 2 is connected to a pressurizing fan 21, two sides of the temporary storage box 2 are respectively provided with an algae bucket 22, an output end of the pressurizing fan 21 is connected to two guide pipes 23, each guide pipe 23 is provided with a fifth valve 24, an upper end of each algae bucket 22 is provided with a butt joint pipe 25, the butt joint pipe 25 is in butt joint with the guide pipe 23, the butt joint pipe 25 and the guide pipe 23 are both sleeved with a sealing ring plate 26, and the two sealing ring plates 26 are connected through a bolt 27. When the device is used, one of the fifth valves 24 is opened, the booster fan 21 is started, the booster fan 21 pressurizes and squeezes the toxic gas in the temporary storage box 2 into the algae barrel 22, the toxic gas is further purified, the algae barrel 22 cultivates the chlorella by means of plant factory technology, the chlorella sufficiently absorbs and converts the toxic gas, the absorption effect and the practicability are improved, when the algae barrel 22 is fully absorbed, the opened fifth valve 24 is closed, the other fifth valve 24 is opened, the effective movement of the device is guaranteed, then the bolt 27 is detached, the full algae barrel 22 is moved away, the new algae barrel 22 is installed through the sealing ring plate 26 and the bolt 27, and the operation is repeated.

The specific operation mode of the utility model is as follows:

when in use, the feeding pipe 31 is connected with the exhaust pipeline of the boiler, then the absorption liquid for treating main toxic sulfide in the flue gas is injected into the absorption box 1 through the feeding valve 11, the absorption liquid used here can be selected according to corresponding equipment, such as methanol, propylene carbonate, polyethylene glycol dimethyl ether and the like, the air inlet machine 32 is started, the toxic gas enters the feeding pipe 31, the first valve 33 and the third valve 43 are opened, the toxic gas enters one absorption box 1 through the first pipeline 3, so that the toxic gas is contacted with the absorption liquid, the motor 51 is started, the rotating shaft 52 rotates to drive the stirring slurry 53 to rotate, the absorption liquid in the absorption box 1 flows rapidly, the adsorption property to the toxic gas is improved, the complete use of the absorption liquid is ensured, the resource waste is avoided, and then the toxic gas enters the second pipeline 4, filtering and adsorbing by an activated carbon adsorption plate, improving the absorption effect by dual adsorption of an adsorption liquid and the activated carbon adsorption plate, starting an exhaust fan 42, enabling the toxic gas to enter the temporary storage box 2, closing a first valve 33 and a third valve 43 when the adsorption liquid and the activated carbon adsorption plate need to be replaced, opening a second valve 34 and a fourth valve 44, enabling the toxic gas to enter another gas path channel, replacing the adsorption liquid and the activated carbon adsorption plate at the moment, replacing the absorption liquid and the activated carbon adsorption plate without stopping the device operation, ensuring the effective operation of the work, improving the working efficiency, opening one of the fifth valves 24, starting a pressurizing fan 21, pressurizing the toxic gas in the temporary storage box 2 into an algae barrel 22 by the pressurizing fan 21, further purifying the toxic gas, culturing the chlorella by the algae barrel 22 by utilizing a plant factory mode technology, fully absorbing and converting the toxic gas by chlorella, improve absorption effect and practicality, when the inside absorption of algae bucket 22 is full, close the fifth valve 24 that has opened, open another fifth valve 24, guarantee the effective motion of device, then pull down bolt 27, will deposit full algae bucket 22 and move aside, with new algae bucket 22 through sealed crown plate 26 and bolt 27 install can.

The utility model is described above with reference to the accompanying drawings, it is obvious that the utility model is not limited to the above-described embodiments, and it is within the scope of the utility model to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. The utility model provides a toxic gas recovery unit that boiler flue gas denitration was used, includes two absorption case (1) and temporary storage case (2), its characterized in that: a first pipeline (3) and a second pipeline (4) are connected between the upper ends of the two absorption boxes (1), two ends of the first pipeline (3) respectively extend to the lower ends of the interiors of the two absorption boxes (1), the middle ends of the opposite sides of the first pipeline (3) and the second pipeline (4) are respectively connected with a feeding pipe (31) and a discharging pipe (41), the discharging pipe (41) is connected with the temporary storage box (2), a first valve (33) and a second valve (34) which are positioned on the first pipeline (3) are respectively arranged on two sides of the feeding pipe (31), a third valve (43) and a fourth valve (44) which are positioned on the second pipeline (4) are respectively arranged on two sides of the discharging pipe (41), and an activated carbon adsorption plate is arranged on the opposite side of the third valve (43) and the fourth valve (44);

the temporary storage box (2) upper end is connected with booster fan (21), temporary storage box (2) both sides are equipped with algae bucket (22) respectively, booster fan (21) output is connected with two pipe (23), every all install fifth valve (24) on pipe (23), every algae bucket (22) upper end all is equipped with butt joint pipe (25), butt joint pipe (25) and pipe (23) butt joint.

2. The toxic gas recovery device for denitration of boiler flue gas according to claim 1, characterized in that: an air inlet fan (32) and an exhaust fan (42) are respectively arranged on the feeding pipe (31) and the discharging pipe (41).

3. The toxic gas recovery device for denitration of boiler flue gas according to claim 1, characterized in that: and the upper end and the lower end of each absorption box (1) are respectively provided with a feed valve (11) and a discharge valve (12).

4. The toxic gas recovery device for denitration of boiler flue gas according to claim 1, characterized in that: every all install rabbling mechanism (5) on absorption box (1), rabbling mechanism (5) include motor (51), motor (51) output is connected with pivot (52), install a plurality of stirring thick liquids (53) on pivot (52).

5. The toxic gas recovery device for denitration of boiler flue gas according to claim 1, characterized in that: the active carbon adsorption board upper end is equipped with connecting plate (46), connecting plate (46) are installed on second pipeline (4) through screw rod (47).

6. The toxic gas recovery device for denitration of boiler flue gas according to claim 5, wherein: the connecting plate (46) is internally connected with a sealing ring (45).

7. The toxic gas recovery device for denitration of boiler flue gas according to claim 1, characterized in that: the butt joint pipe (25) and the guide pipe (23) are sleeved with sealing ring plates (26), and the two sealing ring plates (26) are connected through bolts (27).