CN111054160A

CN111054160A - Self-circulation filtering method in solid waste pyrolysis incineration

Info

Publication number: CN111054160A
Application number: CN202010014057.2A
Authority: CN
Inventors: 李秉正; 彭扬; 吴汕; 王文波; 李�一
Original assignee: Chongqing Angruiyue Science And Technology Co ltd
Current assignee: Chongqing Jinshengyue Intelligent Equipment Co.,Ltd.
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-04-24

Abstract

The invention discloses a self-circulation filtering method in solid waste pyrolysis incineration. The filtering method is controversial to reduce dust in the incineration process, simultaneously solves the hardening problem of residues in the incineration process, further improves the stability and reliability of a process system, and is suitable for pyrolysis incineration disposal of solid wastes such as waste incineration fly ash, chemical waste salt, organic silicon pulp residues, oil sludge, domestic sludge, chemical sludge, printing and dyeing sludge, rectification residues, leather sludge, electroplating sludge, chromium residues and the like.

Description

Self-circulation filtering method in solid waste pyrolysis incineration

Technical Field

The invention relates to the technical field of solid waste treatment, in particular to a technology for harmlessly treating solid waste and hazardous waste through pyrolysis and incineration.

Background

For the field of solid waste incineration, the traditional rotary kiln and fluidized bed incineration mode has the defects of large dust amount, high incineration temperature especially for high-heat-value materials, easy generation of viscous substances such as tar and the like, easy pipeline blockage, material hardening and the like, abnormal system operation, low continuity and high material ignition loss rate. The large amount of dust also causes the severe working environment, which is not good for the physical and mental health of the operators.

Therefore, a new technology is needed to solve the problems of large dust and hardened binder in the incineration process, realize thorough harmless treatment effect and have high feasibility.

Disclosure of Invention

The invention aims to provide a self-circulation filtering method in solid waste pyrolysis incineration aiming at a self-propagating pyrolysis incineration process, so that dust in the incineration process is reduced, the hardening problem of residues in the incineration process is solved, and the stability and reliability of a process system are further improved.

The technical scheme of the invention is as follows:

a self-circulation filtering method for solid waste pyrolysis incineration is characterized in that after being crushed, residues after incineration are circularly used as a filtering layer of an incineration unit, and the filtering layer is paved at the bottom of the incineration unit. The method is suitable for pyrolysis incineration disposal of solid wastes such as waste incineration fly ash, chemical waste salt, organic silicon slurry residue, oil sludge, domestic sludge, chemical sludge, printing and dyeing sludge, rectification residue, leather sludge, electroplating sludge, chromium residue and the like.

Specifically, the method comprises the steps of crushing and screening residues after pyrolysis incineration, screening the crushed residues, selecting the residues with the particle size of 6-30 mm, returning the residues to a front-end layered material distribution device of a pyrolysis incineration system through a sealed conveying system, and distributing the materials to the bottom of an incineration unit to be used as a filter layer. The thickness of the filter layer is 20mm-500mm, preferably 20mm-300 mm.

The method has the following advantages:

1) the self-circulation of the incineration residues is used as a filter layer, so that solid waste dust can be filtered, and moisture generated by upper-layer combustion materials can be adsorbed;

2) the incineration residue self-circulation is used as a filter layer, so that the function of adsorbing viscous substances generated in the incineration process is realized, the viscous substances are prevented from entering a pipeline and a fan, and the problem of blockage of the pipeline and the fan is effectively prevented;

3) the self-circulation of the incinerated residues is used as a filter layer, so that the incineration effect is improved, the air permeability of materials is ensured, the incineration temperature is uniformly distributed, and the heat preservation effect is achieved;

4) the self-circulation of the incinerated residues is used as a filter layer, so that the incinerating unit has the effects of preventing materials from being hardened and adhered to the incinerating unit and ensuring the cleanness of the incinerating unit;

5) the self-circulation of the incinerated residues is used as a filter layer, the extra load of the system is not increased, and the effect of environmental protection in production is achieved.

Drawings

FIG. 1 is a diagram showing the state of cloth in the implementation of the self-circulation filtration method of the present invention.

Detailed Description

The invention is described below with reference to the accompanying drawings:

the invention provides a self-circulation filtering method in solid waste pyrolysis incineration, which is used in a pyrolysis incineration process of a solid waste pyrolysis incineration system, wherein the pyrolysis incineration process comprises a material distribution section, an incineration section, a cooling section and a crushing section, residue obtained after pyrolysis incineration is crushed by the crushing section and circularly conveyed to the material distribution section, and is laid at the bottom of an incineration unit 1 as a bedding material to be used as a filter layer 2 of the incineration unit, and a material to be incinerated 3 is further laid on the filter layer, wherein the material to be incinerated can be solid waste such as waste incineration fly ash, chemical waste salt, organic silicon pulp residue, oil sludge, domestic sludge, chemical sludge, printing and dyeing sludge, rectification residue, leather sludge, electroplating sludge, chromium residue and the like, and is shown in figure 1.

In this embodiment, the crushed residue is screened to select residue with a particle size of 30mm, and the residue is returned to the distribution section of the pyrolysis incineration system. The material is spread at the bottom of the incineration unit, and the thickness of the filter layer is 300 mm.

The particle size of the residue screening is selected according to different specific solid wastes to be incinerated, the principle is that the particle size of the residue screening is selected according to the particle size condition of the materials to be incinerated, and when the particle size of the materials to be incinerated is less than or equal to 3mm, the particle size of the residue screening is 5-8 mm; when the particle size of the material is 3-10mm, the residue is sieved to have the particle size of 6-12 mm; when the grain size of the material is larger than or equal to 10mm, the screening grain size of the residue is 12-30 mm.

The thickness of the filter layer is also selected according to the condition of the materials to be incinerated: when the particle size of the material to be incinerated is less than or equal to 3mm, the thickness of the filter layer is 300-500 mm; when the particle size of the material is 3-10mm, the thickness of the filter layer is 150-300 mm; when the grain diameter of the material is more than or equal to 10mm, the thickness of the filter layer is 20-150 mm.

Claims

1. A self-circulation filtration method in solid waste pyrolysis incineration is characterized in that: the method is characterized in that residues generated after pyrolysis incineration of solid wastes are crushed and circularly used as a filter layer of an incineration unit, and the filter layer is paved at the bottom of the incineration unit, so that the method is suitable for pyrolysis incineration disposal of solid wastes such as waste incineration fly ash, organic silicon slurry residues, oil sludge, domestic sludge, chemical waste salt, chemical sludge, printing and dyeing sludge, kitchen sludge, waste sorting undersize, rectification residues, fermentation residues, leather sludge, electroplating sludge, chromium residues and the like.

2. The self-circulating filtration process of claim 1, wherein: and after the residues are crushed and screened, selecting the residues with the particle size of 6-30 mm, returning the residues to a front-end layered material distribution device of the pyrolysis incineration system through a sealed conveying system, and distributing the materials to the bottom of the incineration unit to be used as a filter layer.

3. The self-circulation filtration process of claim 2, wherein: the particle size of residue screening is selected according to different specific solid wastes to be incinerated, the principle is that the particle size of the material to be incinerated is selected according to the particle size condition, and when the particle size of the material to be incinerated is less than or equal to 3mm, the particle size of the residue screening is 5-8 mm; when the particle size of the material is 3-10mm, the residue is sieved to have the particle size of 6-12 mm; when the grain size of the material is larger than or equal to 10mm, the screening grain size of the residue is 12-30 mm.

4. The self-circulating filtration process of claim 1, wherein: the thickness of the filter layer is 20mm-500 mm.

5. The self-circulating filtration process of claim 5, wherein: the thickness of the filter layer is also selected according to the condition of the materials to be incinerated: when the particle size of the material to be incinerated is less than or equal to 3mm, the thickness of the filter layer is 300-500 mm; when the particle size of the material is 3-10mm, the thickness of the filter layer is 150-300 mm; when the grain diameter of the material is more than or equal to 10mm, the thickness of the filter layer is 20-150 mm.