CN212640400U

CN212640400U - Biogas desulfurization treatment device

Info

Publication number: CN212640400U
Application number: CN202020725535.6U
Authority: CN
Inventors: 顾峥; 李利兴; 杨继
Original assignee: Shanghai Tongji Construction Technology Co ltd
Current assignee: Shanghai Tongji Construction Technology Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-03-02
Anticipated expiration: 2030-05-06

Abstract

The utility model discloses a marsh gas desulfurization processing apparatus, a serial communication port, including the desulfurizing tower, the desulfurizing tower bottom is equipped with the mist feed inlet, the desulfurizing tower bottom is connected with the upper portion of regeneration settling tank through mixed liquid elevator pump, the top and the separator of desulfurizing tower are connected, the upper portion of desulfurizing tower is equipped with the shower head that a plurality of different height arranged, each shower head all is connected with the backwash pump export, the backwash pump import is connected with the lower part of regeneration settling tank, the upper portion of regeneration settling tank still is connected with the export of medicament jar, regeneration settling tank bottom is connected the lower part of regeneration settling tank and the inlet of plate and frame filter press respectively through the dredge pump, the liquid outlet of plate and frame filter press communicates with the middle part of regeneration settling tank; the top of the regeneration settling tank is provided with an air feed inlet and an air outlet, and the air outlet is communicated with the middle part of the liquid separation tank. The utility model has the advantages of extremely fast reaction speed, thorough reaction, high treatment capacity, no three-waste discharge and no secondary pollution; the manual operation is simple, and the specialty is low.

Description

Biogas desulfurization treatment device

Technical Field

The utility model relates to a marsh gas desulfurization processing device, in particular to marsh gas desulfurization produced in the anaerobic process of landfill leachate.

Background

The biogas is a mixed gas generated by organic substances through the fermentation of microorganisms under the anaerobic condition, has the characteristics similar to natural gas, is an ideal and clean gas fuel, belongs to secondary energy, is renewable energy, and can relieve the energy crisis. The application of the methane is wide and the application of the methane as a new energy source is more and more extensive.

The landfill leachate is a high-concentration organic liquid generated under the biochemical degradation effects of compaction, fermentation and the like in the stacking and landfill processes of the garbage and the seepage effect of precipitation and groundwater, has complex water quality, contains various toxic and harmful inorganic matters and organic matters, and COD and BOD of the garbage leachate₅The highest concentration value can reach thousands to tens of thousands, and the percolate can not be directly discharged into a municipal sewage treatment pipeline without strict treatment and disposal. Although the landfill leachate treatment method in China is many, the most widely and mature process is also a combined process of pretreatment plus biochemistry plus membrane. A large amount of marsh gas can be generated in the biochemical (anaerobic) treatment process of the landfill leachate, the marsh gas contains a large amount of high-concentration hydrogen sulfide gas, the direct discharge can pollute the surrounding environment, influence the human health and cause the greenhouse effect, and the marsh gas is a new energy source, and the direct discharge is really in energy waste. Biogas containing high concentration hydrogen sulfide gas cannot be used as energy, and the biogas needs to be purified, namely, the content of the hydrogen sulfide gas in the biogas is reduced, and the process is called biogas desulfurization.

The commonly used biogas desulfurization methods in the industry include: dry desulfurization, wet desulfurization, biological desulfurization and the like. The dry desulfurization is a simple, efficient and relatively low-cost desulfurization mode, but is generally suitable for biogas desulfurization with small biogas amount and low hydrogen sulfide concentration, the filler needs to be replaced in the dry biogas desulfurization to increase the labor intensity and potential safety hazards, secondly, the desulfurizer of the dry desulfurization is mostly regenerated intermittently to influence the production, and the desulfurization effect of the desulfurizer of the dry desulfurization is reduced along with the increase of the service time, so that the hydrogen sulfide content of purified gas is influenced; the biological desulfurization operation management is troublesome, and the reaction time is long; the complex iron absorbent in the traditional complex iron wet method has the defects and shortcomings of low sulfur capacity, low absorption mass transfer efficiency, high auxiliary chemical consumption caused by air peroxidation and the like.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: how to carry out desulfurization treatment on the biogas generated in the anaerobic treatment process of the landfill leachate so that the treated biogas can meet the requirement of being used as energy.

In order to solve the above problem, the utility model discloses a following technical scheme:

a biogas desulfurization treatment device is characterized by comprising a desulfurization tower, wherein a mixed gas feed inlet is formed in the bottom of the desulfurization tower, the bottom of the desulfurization tower is connected with the upper part of a regeneration settling tank through a mixed liquid lifting pump, the top of the desulfurization tower is connected with a separator, a plurality of spray heads arranged at different heights are arranged on the upper part of the desulfurization tower, each spray head is connected with an outlet of a reflux pump, an inlet of the reflux pump is connected with the lower part of the regeneration settling tank, the upper part of the regeneration settling tank is also connected with an outlet of a medicament tank, the bottom of the regeneration settling tank is respectively connected with the lower part of the regeneration settling tank and a liquid inlet of a plate-and-frame filter press through a mud discharge pump, and a liquid outlet of; the top of the regeneration settling tank is provided with an air feed inlet and an air outlet, and the air outlet is communicated with the middle part of the liquid separation tank.

Preferably, the material of the desulfurizing tower and the regenerative settling tank is stainless steel.

Preferably, complex iron dosing pipelines are arranged at different heights of the desulfurizing tower.

Preferably, the complexing iron dosing pipeline is provided with a plurality of spray heads

Preferably, the air feed inlet is communicated with air pipes uniformly distributed in the regeneration settling tank.

Preferably, the biogas desulfurization treatment device is a skid-mounted device.

Preferably, the outlet pipeline of the sludge discharge pump is divided into two paths, and one path of the outlet pipeline is connected with a flange port on the side wall of the regenerative settling tank, so that the stirring effect can be achieved, and the sediment is prevented from blocking the pipeline.

The outlet pipeline of the sludge discharge pump is divided into two paths, and one path of outlet pipeline is connected with a flange port on the side wall of the regenerative settling tank, so that the stirring effect can be achieved, and the sediment is prevented from blocking the pipeline.

The mixed gas that produces among the landfill leachate anaerobic treatment process gets into the desulfurizing tower, complex iron solution gets into the desulfurizing tower from the desulfurizing tower upper portion co-altitude not, the mixed gas contacts the reaction with the complex iron solution of co-altitude not one by one at the in-process that rises, the product of both after reactions is collected to the desulfurizing tower bottom, gas that the reaction is accomplished obtains the purified gas after the separator separation, the simple substance sulphur that generates deposits and obtains sulphur through the dehydration of plate and frame pressure filter in regeneration settling tank, the complex iron product is regenerated in regeneration settling tank through plus air and medicament, the complex iron after the regeneration is used repeatedly in the desulfurizing tower.

The utility model provides a wet process liquid phase redox hydrogen sulfide removal process, the selectivity that has sulphur is high, prevent that the deposit blocks up by force, the working costs is low, anti fluctuation ability is strong, no three wastes discharge, no secondary pollution, it mainly utilizes complex iron and hydrogen sulfide reaction to generate the content of hydrogen sulfide in the simple substance sulphur reduces marsh gas, the desulfurization of complex iron method's rationale is that H is the desulfurated elementary principle of complex iron method₂S is Fe in alkaline solution³⁺Is oxidized to elemental sulphur and is itself oxidized by H₂Reduction of S to Fe²⁺Then oxidizing and regenerating by air to generate Fe³⁺The process has quick reaction and good effect, and the content of hydrogen sulfide in the treated biogas is lower than 20mg/m³。

Compared with the prior art, the beneficial effects of the utility model reside in that: (1) the reaction speed is very fast, and the reaction can be completed in about tens of seconds; (2) the reaction is thorough, complex iron dosing pipes are arranged at different heights in the desulfurizing tower, the reaction contact surface can be increased, and the content of hydrogen sulfide in the reacted gas is lower than 20mg/m³(ii) a (3) The treatment amount is high, and the gas with the sulfur content of 0-30 tons/day can be treated; (4) no three wastes discharge and no secondary pollution; (5) the manual operation is simple, and the specialty is low; (6) because the complex iron is recycled, the consumption of the medicament is low, and the operating cost is low.

Drawings

Fig. 1 is a schematic view of a biogas desulfurization treatment device provided by the utility model.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

As shown in fig. 1, which is a schematic view of a biogas desulfurization treatment device provided by the present invention, the present invention comprises a desulfurization tower 1, a mixed gas feed inlet is arranged at the bottom of the desulfurization tower 1, a flange port is further arranged at the bottom of the desulfurization tower 1 and connected with an inlet of a mixed liquid lift pump 4 through a pipeline, a flange port is arranged at the top of the desulfurization tower 1 and connected with a separator 7 through a pipeline, an outlet of the mixed liquid lift pump 4 is connected with a flange port at the upper part of the side wall at one side of a regeneration settling tank 2 through a pipeline, and the side wall below the flange is provided with another flange port which is connected with an; the outlet of the reflux pump 5 is provided with a plurality of complexing iron dosing pipelines 12 which are connected with the desulfurization tower 1 at different heights. The complex iron dosing pipeline 12 is provided with a plurality of spray headers 13.

The lateral wall of 2 opposite sides of regeneration settling tank is equipped with the flange mouth and links to each other with the export of medicament jar 8, the export of

mud pump

6 and 3 liquid outlets of plate and frame filter press respectively, and 2 tops of regeneration settling tank are equipped with the flange mouth and link to each other with air feed inlet 10 and the import of knockout drum 9 respectively, and air feed inlet 10 communicates with the inside evenly distributed's of regeneration settling tank 2 air hose 11. The bottom of the regeneration settling tank 2 is provided with a flange port which is connected with the inlet of a sludge discharge pump 6 through a pipeline, the outlet pipeline of the sludge discharge pump 6 is divided into two paths, one path is connected with the plate-and-frame filter press 3, and the other path is connected with the flange port on the side wall of the regeneration settling tank 2, so that the stirring effect can be achieved, and the sediment is prevented from blocking the pipeline.

The desulfurizing tower 1 and the regenerative settling tank 2 are made of stainless steel.

The methane desulfurization treatment device can be made into skid-mounted equipment.

The mixed gas generated in the anaerobic treatment process of the landfill leachate enters the desulfurizing tower from the bottom of the desulfurizing tower, the complex iron solution enters the desulfurizing tower from different heights of the upper part of the desulfurizing tower, the mixed gas is contacted and reacted with the complex iron solution with different heights one by one in the rising process, the contact area is increased, the reaction efficiency is improved, the complex iron solution and the complex iron solution react in the desulfurizing tower, the product obtained after the reaction is collected to the bottom of the desulfurizing tower, the gas after the reaction is separated by a separator to obtain purified gas, the product collected by the desulfurizing tower is lifted to a regeneration settling tank by a mixed liquid lifting pump, the sulfur simple substance is precipitated to the bottom in the regeneration settling tank and is lifted to a plate-and-frame filter press by a sludge discharge pump to be dehydrated to obtain sulfur, the supernatant after dehydration contains the medicament and is refluxed to the regeneration settling. Adding medicament and air in the regeneration settling tank and regenerating the complex iron product into complex iron, wherein the regenerated complex iron flows back to the desulfurizing tower through the reflux pump to be recycled, an air aeration pipe is arranged in the regeneration settling tank, the utilization rate of air can be improved, and the air after the reaction is finished is directly discharged into the environment after being separated by a liquid separator from the top of the regeneration settling tank. The outlet of the sludge discharge pump is divided into two paths, one path enters the plate-and-frame filter press to be dehydrated to obtain sulfur, and the other path returns to the regeneration settling tank again, so that the stirring effect is mainly achieved, and the pipeline is prevented from being blocked by excessive sulfur simple substance deposition.

Claims

1. The biogas desulfurization treatment device is characterized by comprising a desulfurization tower (1), wherein a mixed gas feed inlet is formed in the bottom of the desulfurization tower (1), the bottom of the desulfurization tower (1) is connected with the upper part of a regeneration settling tank (2) through a mixed liquid lifting pump (4), the top of the desulfurization tower (1) is connected with a separator (7), a plurality of spray heads (13) arranged at different heights are arranged on the upper part of the desulfurization tower (1), each spray head (13) is connected with an outlet of a reflux pump (5), an inlet of the reflux pump (5) is connected with the lower part of the regeneration settling tank (2), the upper part of the regeneration settling tank (2) is also connected with an outlet of a medicament tank (8), the bottom of the regeneration settling tank (2) is respectively connected with the lower part of the regeneration settling tank (2) and a liquid inlet of a plate-and frame filter press (3) through a mud discharge pump (6), and a liquid outlet of the plate-frame filter press (3) is communicated with the middle part; the top of the regeneration settling tank (2) is provided with an air inlet (10) and an air outlet, and the air outlet is communicated with the middle part of the liquid separating tank (9).

2. The biogas desulfurization treatment apparatus according to claim 1, wherein the desulfurization tower (1) and the regeneration settling tank (2) are made of stainless steel.

3. The biogas desulfurization treatment device according to claim 1, wherein complex iron feeding pipelines (12) are arranged at different heights of the desulfurization tower (1).

4. The biogas desulfurization treatment device according to claim 3, wherein the complex iron dosing pipeline (12) is provided with a plurality of spray headers (13).

5. The biogas desulfurization treatment apparatus according to claim 1, wherein the air feed port (10) is communicated with air pipes (11) uniformly distributed inside the regenerative settling tank (2).

6. The biogas desulfurization treatment apparatus according to claim 1, wherein the biogas desulfurization treatment apparatus is a skid.

7. The biogas desulfurization treatment apparatus according to claim 1, wherein the outlet pipeline of the sludge pump (6) is divided into two paths, and one path is connected with the flange port on the side wall of the regenerative settling tank (2).