CN216472589U

CN216472589U - Integrated processing apparatus of hydrogen sulfide in desorption landfill leachate

Info

Publication number: CN216472589U
Application number: CN202122844060.XU
Authority: CN
Inventors: 吴学钦; 周茂钟
Original assignee: Fuzhou Kehuang Ecological Environmental Protection Technology Co ltd
Current assignee: Fuzhou Kehuang Ecological Environmental Protection Technology Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-05-10
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses an integrated treatment device for removing hydrogen sulfide in landfill leachate, which comprises a flocculation tank, a degassing tank, a hydrogen sulfide absorber, a circulating reaction tank and a hydrogen peroxide tank.

Description

Integrated processing apparatus of hydrogen sulfide in desorption landfill leachate

Technical Field

The utility model relates to the technical field of sewage treatment equipment, in particular to an integrated treatment device for removing hydrogen sulfide in landfill leachate.

Background

During the transition phase in the stabilization process of the landfill, oxygen is consumed, anaerobic conditions are formed, organic matter degradation is transited from aerobic degradation to facultative anaerobic degradation, nitrate and sulfate are reduced into nitrogen (N2) and hydrogen sulfide (H2S) respectively, and the pH of generated hydrogen sulfide leachate begins to drop. In the existing landfill leachate treatment process, a stripping method is mainly adopted for removing hydrogen sulfide, so that hydrogen sulfide gas overflows, the hydrogen sulfide in the air exceeds the standard, secondary pollution is generated, and the hydrogen sulfide belongs to flammable and explosive gas, has high toxicity and generates great harm to site construction safety and the physical health of personnel.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an integrated treatment device for removing hydrogen sulfide in landfill leachate, so as to solve the technical problem.

In order to achieve the purpose, the utility model provides the following technical scheme: an integrated treatment device for removing hydrogen sulfide in landfill leachate comprises a flocculation tank, a degassing tank, a hydrogen sulfide absorber, a circulating reaction tank and a hydrogen peroxide tank, wherein a water inlet pipe is connected to the side wall of the flocculation tank in a penetrating manner, a sludge discharge pipe for discharging precipitated sludge is arranged at the bottom of the flocculation tank in a penetrating manner, a discharge valve is arranged on the sludge discharge pipe, a first water pipe is arranged on the side wall of the flocculation tank in a penetrating manner, one end, away from the flocculation tank, of the first water pipe is communicated with the degassing tank, an air pipe is arranged at the top of the degassing tank in a penetrating manner, one end, away from the degassing tank, of the first water pipe is communicated with the hydrogen sulfide absorber, a second water pipe is arranged on the side wall of the bottom of the degassing tank in a penetrating manner, one end, away from the degassing tank, of the second water pipe is communicated with the circulating reaction tank, a third water pipe is connected to the side wall of the circulating reaction tank, and the hydrogen peroxide tank are communicated through the third water pipe, the side wall of the hydrogen peroxide pool is provided with a water outlet pipe in a run-through way.

Preferably, a one-way valve is arranged on the first water pipe, and the direction of the one-way valve is the direction of the flow of the flocculation tank to the degassing tank.

Preferably, the top of the degassing pool is in through connection with a PH adjusting feeding pipe, a pipe cover is connected to a part of the PH adjusting feeding pipe outside the degassing pool through threads, stirring water trucks are symmetrically arranged on the side wall of the degassing pool, and a water pipe valve is arranged on the second water pipe.

Preferably, be equipped with the air pump on the trachea, be equipped with alkali lye in the hydrogen sulfide absorber, the hydrogen sulfide absorber top is run through and is equipped with the inlet pipe, the partial threaded connection that the inlet pipe is located outside the hydrogen sulfide absorber has the spiral cover, is equipped with the agitator in the hydrogen sulfide absorber, and the hydrogen sulfide absorber bottom is run through and is equipped with the fluid-discharge tube, be equipped with the flowing back valve on the fluid-discharge tube.

Preferably, the top of the circulating reaction tank is connected with a return pipe in a penetrating manner, one end of the return pipe, which is far away from the circulating reaction tank, is communicated with the degassing tank, and the return pipe is provided with a return pump.

Preferably, be equipped with the filter in the hydrogen peroxide pond bottom, filter and hydrogen peroxide pond inner wall sliding connection are fixed on the filter and are equipped with the pull ring.

Compared with the prior art, the utility model has the beneficial effects that: the check valve on the first water pipe prevents the hydrogen sulfide gas from flowing into the air through the first water pipe to cause harm; the stirring waterwheel accelerates the speed of the landfill leachate to remove hydrogen sulfide; the agitator of the hydrogen sulfide absorber accelerates the absorption of hydrogen sulfide; the arrangement of the return pipe further removes hydrogen sulfide in the landfill leachate; the hydrogen peroxide pool reacts with the residual hydrogen sulfide in the leachate again to generate elemental sulfur, and the elemental sulfur can be recycled through the filter plate; the device achieves high removal rate of hydrogen sulfide in the landfill leachate, and has simple structure and convenient use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present embodiment;

in the drawings, the components represented by the respective reference numerals are listed below:

1. a flocculation tank; 2. a sludge discharge pipe; 3. a discharge valve; 4. a water inlet pipe; 5. a first water pipe; 6. a one-way valve; 7. stirring a waterwheel; 8. a degassing pool; 9. a PH adjusting feeding pipe; 10. a tube cover; 11. an air tube; 12. an air pump; 13. a hydrogen sulfide absorber; 14. a feed pipe; 15. screwing a cover; 16. a stirrer; 17. a liquid discharge pipe; 18. a drain valve; 19. a second water pipe; 20. circulating the reaction tank; 21. a return pipe; 22. a reflux pump; 23. a third water pipe; 24. a hydrogen peroxide tank; 25. a filter plate; 26. a pull ring; 27. a water outlet pipe; 28. a water pipe valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: an integrated treatment device for removing hydrogen sulfide in landfill leachate comprises a flocculation tank 1, a degassing tank 8, a hydrogen sulfide absorber 13, a circulating reaction tank 20 and a hydrogen peroxide tank 24, wherein a water inlet pipe 4 is penetratingly connected to the side wall of the flocculation tank 1, a sludge discharge pipe 2 for discharging precipitated sludge is penetratingly arranged at the bottom of the flocculation tank 1, a discharge valve 3 is arranged on the sludge discharge pipe 2, a first water pipe 5 is penetratingly arranged on the side wall of the flocculation tank 1, one end, far away from the flocculation tank 1, of the first water pipe 5 is communicated with the degassing tank 8, an air pipe 11 is penetratingly arranged at the top of the degassing tank 8, one end, far away from the degassing tank 8, of the first water pipe 5 is communicated with the hydrogen sulfide absorber 13, a second water pipe 19 is penetratingly arranged on the side wall of the bottom of the degassing tank 8, one end, far away from the degassing tank 8, of the second water pipe 19 is communicated with the circulating reaction tank 20, and a third water pipe 23 is penetratingly connected to the side wall of the circulating reaction tank 20, the circular reaction tank 20 is communicated with a hydrogen peroxide tank 24 through a third water pipe 23, and a water outlet pipe 27 is arranged on the side wall of the hydrogen peroxide tank 24 in a penetrating way.

Specifically, be equipped with check valve 6 on the first water pipe 5, the direction of check valve 6 is the direction of flocculation basin 1 flow direction to degasification pond 8, prevents that the hydrogen sulfide in the degasification pond 8 from causing harm in flowing into the air through first water pipe 5.

Concretely, 8 top through connections in degassing tank have PH to adjust and throw the pipe 9, the partial screw thread that the pipe 9 was located outside degassing tank 8 in PH regulation has a tube cap 10 in succession, throw the pipe 9 through PH regulation and add alkali or the pH value of acid regulation degassing tank 8 to degassing tank 8, the symmetry is equipped with the stirring waterwheel 7 on the 8 lateral walls in degassing tank, hydrogen sulfide in the filtration liquid gets into in the air with higher speed, be equipped with water pipe valve 28 on the second water pipe 19, open water pipe valve 28 again after hydrogen sulfide in the infiltration filtrating in degassing tank 8 gets into the air, guarantee filtration liquid hydrogen sulfide removal efficiency.

Specifically, be equipped with air pump 12 on the trachea 11, absorb the hydrogen sulfide gas in the degasification pond 8 to in the hydrogen sulfide absorber 13, be equipped with alkali lye in the hydrogen sulfide absorber 13, the top of hydrogen sulfide absorber 13 is run through and is equipped with inlet pipe 14, the partial threaded connection that inlet pipe 14 is located outside the hydrogen sulfide absorber 13 has spiral cover 15, spiral cover 15 unscrews, can add alkali lye in the hydrogen sulfide absorber 13 through inlet pipe 14, be equipped with agitator 16 in the hydrogen sulfide absorber 13, thereby accelerate the absorption of hydrogen sulfide with the reaction of alkali lye, the bottom of hydrogen sulfide absorber 13 is run through and is equipped with fluid-discharge tube 17, be equipped with flowing-discharge valve 18 on the fluid-discharge tube 17, open flowing-discharge valve 18, the sodium polysulfide that discharge alkali lye and hydrogen sulfide reaction generate, recycle.

Specifically, the top of the circulation reaction tank 20 is connected with a return pipe 21 in a penetrating manner, one end of the return pipe 21, which is far away from the circulation reaction tank 20, is communicated with the degassing tank 8, a return pump 22 is arranged on the return pipe 21, and the leachate which is not removed from the hydrogen sulfide in the degassing tank 8 is returned, so that the removal rate of the hydrogen sulfide is improved.

Specifically, be equipped with filter 25 in the 24 bottoms in hydrogen peroxide pond,

filter

25 and 24 inner wall sliding connection in hydrogen peroxide pond, the fixed pull ring 26 that is equipped with on the filter 25, hydrogen sulfide and hydrogen peroxide reaction generate sulphur and deposit, and pulling pull ring 26 drives filter 25, just can take out sulphur simple substance deposit, retrieves and recycles.

One specific application example of this embodiment is:

when the device is used, garbage leachate is discharged into a flocculation tank 1 from a water inlet pipe 4, a flocculating agent is put into the flocculation tank 1 to generate precipitation, the load is lightened for the subsequent treatment of the leachate, the precipitation is discharged through a sludge discharge pipe 2, the leachate enters a degassing tank 8 through a first water pipe 5, the pH value in the degassing tank 8 is adjusted to about 6 through a pH adjusting and putting pipe 9, hydrogen sulfide in the leachate is desorbed from the leachate and enters air, the stirring effect of a stirring waterwheel 7 is added to accelerate the hydrogen sulfide in the leachate to enter the air, an air pump 12 is started to suck hydrogen sulfide gas in the degassing tank 8 into a hydrogen sulfide absorber 13 through an air pipe 11 to absorb the hydrogen sulfide, a water pipe valve 28 is opened, the garbage leachate enters a circulating reaction tank 20 from the degassing tank 8, a reflux pump 22 is started to pump the garbage leachate in the circulating reaction tank 20 back to the degassing tank 8 to perform the desorption of the hydrogen sulfide again, the hydrogen sulfide removal rate in the leachate is improved, the leachate in the circulating reaction tank 20 enters a hydrogen peroxide tank 24 through a third water pipe 23, residual hydrogen sulfide in the landfill leachate reacts with hydrogen peroxide to generate sulfur simple substance precipitate, the filter plate 25 is pulled out through a pulling pull ring 26 to recycle the sulfur simple substance, and finally the landfill leachate which is removed with the hydrogen sulfide is discharged through a water outlet pipe 27 to be treated in the next step.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the claims and their equivalents.

Claims

1. The utility model provides an integrated processing apparatus of hydrogen sulfide in desorption landfill leachate, includes flocculation basin (1), degasification pond (8), hydrogen sulfide absorber (13), circulation reaction tank (20) and hydrogen peroxide pond (24), its characterized in that: the device is characterized in that a water inlet pipe (4) is connected to the side wall of the flocculation tank (1) in a penetrating manner, a sludge discharge pipe (2) used for discharging precipitated sludge is arranged at the bottom of the flocculation tank (1) in a penetrating manner, a discharge valve (3) is arranged on the sludge discharge pipe (2), a first water pipe (5) is arranged on the side wall of the flocculation tank (1) in a penetrating manner, one end, far away from the flocculation tank (1), of the first water pipe (5) is communicated with a degassing tank (8), an air pipe (11) is arranged at the top of the degassing tank (8) in a penetrating manner, one end, far away from the degassing tank (8), of the first water pipe (5) is communicated with a hydrogen sulfide absorber (13), a second water pipe (19) is arranged on the side wall of the bottom of the degassing tank (8) in a penetrating manner, one end, far away from the degassing tank (8), of the second water pipe (19) is communicated with a circulating reaction tank (20), a third water pipe (23) is connected to the side wall of the circulating reaction tank (20), and the circulating reaction tank (20) is communicated with a hydrogen peroxide pool (24) through the third water pipe (23), a water outlet pipe (27) is arranged on the side wall of the hydrogen peroxide pool (24) in a penetrating way.

2. The integrated treatment device for removing hydrogen sulfide in landfill leachate according to claim 1, wherein: be equipped with check valve (6) on first water pipe (5), the direction of check valve (6) is the direction that flocculation basin (1) flow direction degasification pond (8).

3. The integrated treatment device for removing hydrogen sulfide in landfill leachate according to claim 1, wherein: the top of the degassing pool (8) is connected with a PH adjusting feeding pipe (9) in a penetrating manner, a pipe cover (10) is connected to a part of the PH adjusting feeding pipe (9) which is positioned outside the degassing pool (8) in a threaded manner, stirring water wheels (7) are symmetrically arranged on the side wall of the degassing pool (8), and a water pipe valve (28) is arranged on the second water pipe (19).

4. The integrated treatment device for removing hydrogen sulfide in landfill leachate according to claim 1, wherein: be equipped with air pump (12) on trachea (11), hydrogen sulfide absorber (13) inside is equipped with alkali lye, and hydrogen sulfide absorber (13) top is run through and is equipped with inlet pipe (14), the partial threaded connection that inlet pipe (14) are located outside hydrogen sulfide absorber (13) has spiral cover (15), is equipped with agitator (16) in hydrogen sulfide absorber (13), and hydrogen sulfide absorber (13) bottom is run through and is equipped with fluid-discharge tube (17), be equipped with leakage fluid valve (18) on fluid-discharge tube (17).

5. The integrated treatment device for removing hydrogen sulfide in landfill leachate according to claim 1, wherein: the top of the circulating reaction tank (20) is connected with a return pipe (21) in a penetrating way, one end of the return pipe (21) far away from the circulating reaction tank (20) is communicated with the degassing tank (8), and a return pump (22) is arranged on the return pipe (21).

6. The integrated treatment device for removing hydrogen sulfide in landfill leachate according to claim 1, wherein: be equipped with filter (25) in hydrogen peroxide pond (24) bottom, filter (25) and hydrogen peroxide pond (24) inner wall sliding connection, fixed pull ring (26) that are equipped with on filter (25).