CN111249895A - Dry powder injection deacidification method for deacidification agent in drying section area of garbage incinerator - Google Patents
Dry powder injection deacidification method for deacidification agent in drying section area of garbage incinerator Download PDFInfo
- Publication number
- CN111249895A CN111249895A CN202010156412.XA CN202010156412A CN111249895A CN 111249895 A CN111249895 A CN 111249895A CN 202010156412 A CN202010156412 A CN 202010156412A CN 111249895 A CN111249895 A CN 111249895A
- Authority
- CN
- China
- Prior art keywords
- deacidification
- incinerator
- dry powder
- agent
- drying section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
- B01D2258/0291—Flue gases from waste incineration plants
Abstract
The invention relates to the technical field of flue gas deacidification, and discloses a dry powder jet deacidification method for a deacidification agent in a drying section area of a garbage incinerator, which comprises the following steps: firstly, adding dry powder particles of the deacidification agent into a storage bin, conveying the deacidification agent to a nozzle interface of an incinerator by using pipeline wind power through a feeder at the bottom of the storage bin, and spraying the deacidification agent into a drying section area of the incinerator through a nozzle to be in contact reaction with acid gas generated by household garbage. The invention effectively reduces the concentration of the acid gas entering the waste heat boiler from the incinerator by deacidifying in the incinerator, and simultaneously, part of the alkaline deacidifying agent is attached to the pipeline in the incinerator to directly protect the metal material.
Description
Technical Field
The invention relates to the technical field of flue gas deacidification, in particular to a dry powder injection deacidification technology for deacidification agents in a drying section of a mechanical grate garbage incinerator.
Background
The flue gas deacidification of the mechanical grate garbage incinerator of the household garbage incineration plant is widely realized by adopting dry method, semi-dry method and wet method technologies at present. In order to meet the emission standard of flue gas treatment, a deacidification technology and process combination scheme is generally adopted, and the deacidification technology and process combination scheme mainly comprises combined processes of a semi-dry method and a dry method, a dry method and a wet method, a semi-dry method and a wet method and the like.
Most of the existing flue gas deacidification treatment modes have large dosage of deacidification agents, and unreacted deacidification agents or reactants thereof enter a cloth bag to finally become a constituent part of fly ash, so that the fly ash amount is increased; the subsequent treatment cost is improved, the nozzle of the atomizer is easy to block, and the inner wall of the tower is easy to be attached and accumulated by solid chemical substances.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a deacidification agent dry powder spraying deacidification technology in the drying section area of a mechanical fire grate garbage incinerator, which solves the problems that the use amount of the deacidification agent is large in most of the existing flue gas deacidification treatment modes, and the unreacted deacidification agent or the reactant thereof enters a cloth bag to finally become a constituent part of fly ash, so that the fly ash amount is increased; the subsequent treatment cost is improved, the nozzle of the atomizer is easy to block, and the inner wall of the tower is easy to adhere and accumulate solid chemical substances.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a dry powder injection deacidification method for deacidification agent in a drying section area of a garbage incinerator comprises the following steps:
s1: firstly, adding deacidification agent dry powder particles into a storage bin, wherein garbage in an incinerator is at a drying section position;
s2: when the domestic garbage passes through the drying section area of the mechanical grate incinerator, the deacidification agent dry powder in the storage bin is supplied by a feeder;
s3: conveying the deacidification agent dry powder particles to a nozzle interface of a mechanical grate garbage incinerator by a dry powder pipeline;
s4: the deacidification agent dry powder particles are sprayed into the hearth after passing through two sides of the mechanical grate garbage incinerator or a nozzle at the top of the incinerator;
s5: the deacidification agent dry powder particles sprayed into the hearth are in contact reaction with acid gas in smoke generated when the domestic garbage is dried, decomposed and incinerated;
s6: after the deacidification agent dry powder particles are contacted with the acid gas, the deacidification reaction efficiency and the deacidification agent utilization rate are improved through the specificity of the contact area, so that the aim of deacidification is fulfilled;
preferably, the specific position of the area described in the second step is an approximate 'dead angle' area formed by a garbage accumulation layer undergoing drying and a front arch of the incinerator, the influence of primary air and secondary air of the incinerator is minimum, the flow rate of flue gas is slow, the concentration of acidic gas is high, and the area is the initial position formed by the incineration flue gas and the farthest position from the smoke outlet of the boiler.
Preferably, the specific installation positions of the nozzles in the third step are on both sides of the furnace wall of the drying section of the incinerator near the feeding platform or on the top of the front arch of the incinerator.
Preferably, the method is a pre-process and a supplementary process of the flue gas deacidification process of the existing garbage incinerator.
Preferably, the deacidification agent is directly sprayed into the furnace of the drying section of the mechanical grate in the fourth step.
Preferably, the feeder is embodied as a variable frequency disk distributor.
(III) advantageous effects
Compared with the prior art, the invention provides a dry powder injection deacidification technology for deacidification agent in a drying section area of a mechanical grate garbage incinerator, which has the following beneficial effects:
1. according to the dry powder injection deacidification technology of the deacidification agent in the drying section of the mechanical grate garbage incinerator, the deacidification agent is deacidified in the incinerator, so that the concentration of acid gas entering a waste heat boiler from the incinerator is effectively reduced, and meanwhile, part of the alkaline deacidification agent is attached to a pipeline in the incinerator to directly protect metal materials; the process can effectively slow down the corrosion speed of the heating surface of the boiler and accessories in the boiler, and prolong the service life of equipment.
2. This regional deacidification agent dry powder of mechanical grate waste incinerator dry section sprays deacidification technique effectively reduces the load of stove back flue gas processing system, guarantees the overall deacidification efficiency of system more reliably, effectively reduces smoke pollutants discharge concentration, improves the gas cleaning effect, ensures that the flue gas is stable discharge to reach standard.
3. The dry powder injection deacidification technology for the deacidification agent in the drying section area of the mechanical grate garbage incinerator can effectively improve the utilization rate of the deacidification agent of the flue gas treatment system, reduce the calcium-sulfur ratio and reduce the dosage of the deacidification agent of the tail flue gas treatment system.
4. According to the dry powder injection deacidification technology of the deacidification agent in the drying section area of the mechanical grate garbage incinerator, salt and unreacted particles formed after dry deacidification are partially discharged from the bottoms of all flues to form furnace slag; part of the fly ash enters a flue gas system behind the furnace to form fly ash; due to the reduction of the dosage of the deacidification agent of the flue gas treatment system after the furnace, the generation amount of the fly ash (waste class HW 18) generated by burning the household garbage can be effectively reduced, and the treatment and disposal cost of the dangerous waste of enterprises is reduced.
5. The deacidification agent dry powder injection deacidification technology for the mechanical grate garbage incinerator drying section area directly injects the deacidification agent to the mechanical grate drying section hearth, the technology can be used as a pre-process and a supplementary process of the existing garbage incinerator flue gas deacidification technology, the deacidification agent dry powder injection deacidification technology is added to an original flue gas treatment system, the operation of the original system is not influenced, the utilization rate of the deacidification agent of the overall flue gas treatment system can be improved after the process is added to the original system, the flue gas purification effect is improved, the margin of controlling the environmental protection parameters to discharge up to standard is improved, the corrosion of the flue gas to each heating surface of boiler equipment is reduced, the service life of the boiler equipment is prolonged, the generation amount of the waste incineration fly ash is reduced, the environmental protection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.
Example (b):
a dry powder injection deacidification method for deacidification agent in a drying section area of a garbage incinerator comprises the following steps:
s1: firstly, adding deacidification agent dry powder particles into a storage bin, wherein garbage in an incinerator is at a drying section position;
s2: when the domestic garbage passes through the drying section area of the mechanical grate incinerator, the deacidification agent dry powder in the storage bin is supplied by a feeder;
s3: conveying the deacidification agent dry powder particles to a nozzle interface of a mechanical grate garbage incinerator by a dry powder pipeline;
s4: the deacidification agent dry powder particles are sprayed into the hearth after passing through two sides of the mechanical grate garbage incinerator or a nozzle at the top of the incinerator;
s5: the deacidification agent dry powder particles sprayed into the hearth are in contact reaction with acid gas in smoke generated when the domestic garbage is dried, decomposed and incinerated;
s6: after the deacidification agent dry powder particles are contacted with the acid gas, the deacidification reaction efficiency and the deacidification agent utilization rate are improved through the specificity of the contact area, so that the aim of deacidification is fulfilled;
specifically, the specific position of the area described in the step two is an approximate 'dead angle' area formed by a garbage accumulation layer which is being dried and a front arch of the incinerator, the influence of primary air and secondary air of the incinerator is minimum, the flow rate of flue gas is slow, the concentration of acidic gas is high, and the area is the initial position formed by the incineration flue gas and the farthest position from the smoke outlet of the boiler.
Specifically, the nozzles in the third step are specifically installed on two sides of the furnace wall of the drying section of the incinerator close to the feeding platform or on the top of the front arch of the incinerator.
Specifically, the method is a preposed process and a supplementary process of the flue gas deacidification process of the existing garbage incinerator.
Specifically, the feeder is a variable frequency disc distributor.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A dry powder injection deacidification method for deacidification agent in a drying section area of a garbage incinerator is characterized by comprising the following steps:
s1: firstly, adding deacidification agent dry powder particles into a storage bin, wherein garbage in an incinerator is at a drying section position;
s2: when the domestic garbage passes through the drying section area of the mechanical grate incinerator, the deacidification agent dry powder in the storage bin is supplied by a feeder;
s3: conveying the deacidification agent dry powder particles to a nozzle interface of a mechanical grate garbage incinerator by a dry powder pipeline;
s4: the deacidification agent dry powder particles are sprayed into the hearth after passing through two sides of the mechanical grate garbage incinerator or a nozzle at the top of the incinerator;
s5: the deacidification agent dry powder particles sprayed into the hearth are in contact reaction with acid gas in smoke generated when the domestic garbage is dried, decomposed and incinerated;
s6: after the deacidification agent dry powder particles are contacted with the acid gas, the deacidification reaction efficiency and the deacidification agent utilization rate are improved through the specificity of the contact area, and the purpose of deacidification is achieved.
2. The dry powder injection deacidification method for deacidification of waste incinerator dry zone according to claim 1, wherein said zone described in step two is a region of approximate "dead angle" formed by waste accumulation layer and front arch of incinerator under drying, which is least affected by primary air and secondary air of incinerator, and has low flue gas flow rate and high acid gas concentration, and is the initial position formed by incineration flue gas, and the farthest position from boiler smoke outlet.
3. The dry powder injection deacidification method for the deacidification agent in the dry section of the garbage incinerator according to claim 1, wherein the nozzles in the third step are specifically installed at the two sides of the wall of the dry section of the incinerator near the feeding platform or at the top of the front arch of the incinerator.
4. The dry powder injection deacidification method for the deacidification agent in the drying section area of the garbage incinerator according to claim 1, wherein the method is a pre-process and a supplementary process of the flue gas deacidification process of the existing garbage incinerator.
5. The dry powder injection deacidification method of the deacidification agent in the drying section of the garbage incinerator according to the claim 1, wherein the deacidification agent is directly injected into the hearth of the drying section of the mechanical grate in the fourth step.
6. The dry powder injection deacidification method for the deacidification of the dry acid in the drying section area of the garbage incinerator according to claim 1, wherein the feeder is a variable frequency disc distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010156412.XA CN111249895A (en) | 2020-03-09 | 2020-03-09 | Dry powder injection deacidification method for deacidification agent in drying section area of garbage incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010156412.XA CN111249895A (en) | 2020-03-09 | 2020-03-09 | Dry powder injection deacidification method for deacidification agent in drying section area of garbage incinerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111249895A true CN111249895A (en) | 2020-06-09 |
Family
ID=70946389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010156412.XA Pending CN111249895A (en) | 2020-03-09 | 2020-03-09 | Dry powder injection deacidification method for deacidification agent in drying section area of garbage incinerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111249895A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1541756A (en) * | 2003-11-05 | 2004-11-03 | 鸿 余 | Calcium spraying catalytic desulfurization method in pulverized coal fired boiler and device thereof |
-
2020
- 2020-03-09 CN CN202010156412.XA patent/CN111249895A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1541756A (en) * | 2003-11-05 | 2004-11-03 | 鸿 余 | Calcium spraying catalytic desulfurization method in pulverized coal fired boiler and device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102537975B (en) | Circulating fluidized bed garbage incineration boiler and pollution control system with same | |
| CN112460604A (en) | Hazardous waste incineration flue gas treatment system and hazardous waste incineration flue gas treatment method | |
| CN102944018A (en) | Burning and waste heat power generation system for hazardous wastes | |
| CN112121614A (en) | Stable ultralow emission device and method for solid waste incineration flue gas | |
| CN101655240A (en) | Sludge incinerating system, method and dried slag removing boiler for incinerating sludge | |
| CN111928263A (en) | System for utilize rotary kiln to burn burning furnace and handle hazardous waste | |
| CN101037193A (en) | Technology and device for producing yellow Phosphorus by electric oven process | |
| CN203330097U (en) | Integrated treatment and utilization device for hazardous decoction dreg wastes | |
| CN107008120A (en) | Utilize the SO of urea pyrolysis waste heat3Removing system and its removal methods | |
| CN100504169C (en) | Incineration processing method and device for wet sludge | |
| CN111249895A (en) | Dry powder injection deacidification method for deacidification agent in drying section area of garbage incinerator | |
| CN202074532U (en) | High concentration salt bearing organic waste liquid incinerator | |
| CN111256147A (en) | Household garbage pyrolysis gasification incineration grate furnace and treatment system thereof | |
| CN216047703U (en) | Secondary air system of circulating fluidized bed domestic garbage incinerator | |
| CN213089821U (en) | System for utilize rotary kiln to burn burning furnace and handle hazardous waste | |
| CN106765123B (en) | High-capacity garbage high-temperature gasification jet combustion system | |
| CN101322909A (en) | Recirculation type semidry process reaction tower for purifying flue gas and technique thereof | |
| CN210568478U (en) | Chemical industry contains salt raffinate burning system | |
| CN208222513U (en) | A kind of mixed combustion environment-friendly disposal system of three industrial wastes | |
| CN112128769A (en) | Hazardous waste treatment system and process | |
| CN206867999U (en) | SO3 removing systems based on alkaline absorbent fine particle | |
| CN2467146Y (en) | Multifunction evaporation tower | |
| CN220143001U (en) | Desulfurization device flue gas reflux structure for hazardous waste incineration | |
| CN215572217U (en) | Horse hoof type glass kiln dry process denitration's processing apparatus | |
| CN209540899U (en) | A kind of waste incinerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200609 |