CN219050783U

CN219050783U - Synthetic gas purification treatment system for organic solid waste pyrolysis

Info

Publication number: CN219050783U
Application number: CN202223123771.9U
Authority: CN
Inventors: 刘丽红; 许伟; 王亚鹏
Original assignee: Zhejiang Tianxiang Environmental Service Co ltd
Current assignee: Zhejiang Tianxiang Environmental Service Co ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-05-23
Anticipated expiration: 2032-11-23

Abstract

The utility model relates to the field of gas purification and utilization, in particular to a synthesis gas purification treatment system for pyrolysis of organic solid wastes. The utility model provides a synthetic gas purification processing system for organic solid waste pyrolysis, includes gas delivery pipeline, filtering mechanism and scrubbing tower set up on gas delivery pipeline, its characterized in that, filtering mechanism upper reaches is provided with cyclone, and the low reaches is provided with plasma purification mechanism, cyclone's gas outlet connects filtering mechanism's gas inlet, filtering mechanism's gas outlet connects plasma purification mechanism's gas inlet, plasma purification mechanism's gas outlet connects the gas inlet of scrubbing tower lower part. The system has the characteristics of high removal efficiency and low operation cost. The method can simultaneously treat impurity components in a plurality of synthetic gases such as solid particles, tar, acid gas and the like, and realize separation and recovery of the tar in the synthetic gases to obtain high-quality synthetic gas products.

Description

Synthetic gas purification treatment system for organic solid waste pyrolysis

Technical Field

The utility model relates to the field of gas purification and utilization, in particular to a synthesis gas purification treatment system for pyrolysis of organic solid wastes.

Background

The traditional incineration method for treating the organic solid waste needs to have enough temperature and residence time to ensure that the dioxin emission reaches the standard. In order to prevent dioxin from being produced, only the process formula for preparing the synthetic gas by anoxic/anaerobic pyrolysis can be realized, and the formation of chlorine-containing organic compounds is fundamentally restrained. That is, chlorine exists as an inorganic salt in a reducing atmosphere, such as highly toxic dioxin is reduced and dechlorinated and then converted into less toxic dioxane, further reduced possibly into phenol, and hydrocarbon is converted into synthesis gas: carbon monoxide and hydrogen (co+h2). The process has the remarkable characteristic that the generation process of dioxin is inhibited in principle. However, it is well known that the greatest disadvantage of this process is the generation of large amounts of tar, which is a great challenge both for the quality of the synthesis gas product formed and for its subsequent purification and upgrading, as well as a major factor limiting the widespread use of this technology.

The tar removal of the synthesis gas is classified into a dry method and a wet method. The dry process has low cost and simple operation, but has low removal efficiency, and can easily block subsequent gas purification treatment equipment and pipelines. Wet processes have high removal efficiency but are costly and difficult to treat resulting in large amounts of highly concentrated derived wastewater.

Disclosure of Invention

Aiming at the problems, a synthesis gas purification treatment system for pyrolysis of organic solid wastes is developed. The system has the characteristics of high removal efficiency and low operation cost. The method can simultaneously treat impurity components in a plurality of synthetic gases such as solid particles, tar, acid gas and the like, and realize separation and recovery of the tar in the synthetic gases to obtain high-quality synthetic gas products.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a synthetic gas purification processing system for organic solid waste pyrolysis, includes gas delivery pipeline, filtering mechanism and scrubbing tower set up on gas delivery pipeline, its characterized in that, filtering mechanism upper reaches is provided with cyclone, and the low reaches is provided with plasma purification mechanism, cyclone's gas outlet connects filtering mechanism's gas inlet, filtering mechanism's gas outlet connects plasma purification mechanism's gas inlet, plasma purification mechanism's gas outlet connects the gas inlet of scrubbing tower lower part.

Preferably, the inlet of the cyclone separation mechanism is connected with the gas outlet of the pyrolysis furnace.

Preferably, the cyclone separation mechanism consists of one or more rotating particle separators.

Preferably, the bottom ash outlet of the cyclone separation mechanism collects tar and particulate matter by a conveyor.

Preferably, the filter mechanism comprises two or more parallel tanks and an inner filler.

Preferably, the filter mechanism filling material is one or more of fabric, quartz and slag discharged from an organic solid waste pyrolysis furnace.

Preferably, the plasma purifying mechanism is a low-temperature plasma processing device with dielectric barrier discharge.

Preferably, the washing tower is a spray tower or a swirl plate tower.

Preferably, the liquid phase of the washing tower adopts water or sodium hydroxide solution.

The utility model provides a synthesis gas purification treatment system for pyrolysis of organic solid wastes, which has the advantages of wide adaptability, high removal efficiency and less secondary pollution, and purified gas can be collected as fuel.

The method has the following technical effects and advantages:

1. most of the tar component in the synthesis gas can be recovered for further processing by the cyclone separation mechanism.

2. The dry method, the wet method and the plasma purification are adopted to effectively combine various technologies, the removal efficiency is high, the impurity components in various synthesis gases such as solid particles, tar, acid gases and the like can be treated at the same time, and the purification effect of the synthesis gases is good.

3. Can realize continuous operation and is simple to operate. The number of the devices can be adjusted according to the tail gas of the pyrolysis furnace, and the adaptability is strong.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Detailed Description

The technical scheme in the embodiment of the utility model is checked and fully described in combination with the embodiment of the utility model, and the utility model is further explained. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. Given the embodiments of the present utility model, all other embodiments that would be obvious to one of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.

Examples

A synthesis gas purification treatment system for pyrolysis of organic solid wastes, comprising a gas conveying pipeline, a cyclone separation mechanism 1 for primarily separating fly ash and tar particles in the gas, a filtering mechanism 2 connected with the cyclone separation mechanism 1 through the gas conveying pipeline for intercepting particles and acid gases, a plasma purifying mechanism 3 connected with the filtering mechanism 2 through the gas conveying pipeline and used for decomposing tar in the gas in a steam state, and a washing tower 4 connected with the plasma purifying mechanism 3 through the gas conveying pipeline and used for absorbing acid gases;

the cyclone separation mechanism 1 consists of one or more rotating particle separators, and utilizes mechanical force to separate coarse particles and tar droplets from gas. The inlet of the cyclone separation mechanism 1 is connected with the gas outlet of the pyrolysis furnace, the gas outlet of the cyclone separation mechanism 1 is connected with the inlet of the filtering mechanism 2, and the ash outlet at the bottom of the cyclone separation mechanism 1 is used for collecting tar and particulate matters through a conveyor.

The filter mechanism 2 includes two or more parallel cases and an internal filler. Half of the devices of the filter mechanism 2 work, and the other half regenerates. The filling material can be selected from fabrics, quartz and slag discharged from an organic solid waste pyrolysis furnace. The filter mechanism 2 can remove particulate matters and tar with smaller particle sizes and absorb part of acid gas.

The gas outlet of the filtering mechanism 2 is connected with the gas inlet of the plasma purifying mechanism 3. The plasma cleaning mechanism 3 is preferably a low temperature plasma processing apparatus of dielectric barrier discharge. The plasma purifying mechanism 3 thoroughly decomposes a small amount of tar remaining in the gas.

The gas outlet of the plasma purifying mechanism 3 is connected with the gas inlet at the lower part of the washing tower 4. The washing tower 4 can be a spray tower or a cyclone plate tower, and the liquid phase adopts water or sodium hydroxide solution.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a synthetic gas purification processing system for organic solid waste pyrolysis, includes gas delivery pipeline, filtering mechanism (2) and scrubbing tower (4) set up on gas delivery pipeline, its characterized in that, filtering mechanism (2) upper reaches is provided with cyclone (1), and the low reaches is provided with plasma purification mechanism (3), the gas inlet of filtering mechanism (2) is connected to the gas outlet of cyclone (1), the gas inlet of plasma purification mechanism (3) is connected to the gas outlet of filtering mechanism (2), the gas inlet of scrubbing tower (4) lower part is connected to the gas outlet of plasma purification mechanism (3).

2. The system according to claim 1, characterized in that the inlet of the cyclone separation mechanism (1) is connected to the gas outlet of the pyrolysis furnace.

3. The system according to claim 1, characterized in that the cyclone separation mechanism (1) consists of one or more rotating particle separators.

4. The system according to claim 1, characterized in that the bottom ash outlet of the cyclone separation mechanism (1) collects tar and particulate matter by means of a conveyor.

5. The system according to claim 1, characterized in that the filtering means (2) comprise more than two juxtaposed tanks and an internal filling material.

6. The system according to claim 1, characterized in that the filter means (2) is filled with one of fabric, quartz and slag discharged from the organic solid waste pyrolysis furnace.

7. The system according to claim 1, characterized in that the plasma cleaning mechanism (3) is a dielectric barrier discharge low temperature plasma processing apparatus.

8. The system according to claim 1, characterized in that the scrubber (4) is a spray tower or a swirl plate tower.

9. The system according to claim 1, characterized in that the scrubber (4) liquid phase employs water or sodium hydroxide solution.