CN108192685B - Online chemical decoking agent and decoking process based on hazardous waste incineration coking - Google Patents
Online chemical decoking agent and decoking process based on hazardous waste incineration coking Download PDFInfo
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- CN108192685B CN108192685B CN201711461341.9A CN201711461341A CN108192685B CN 108192685 B CN108192685 B CN 108192685B CN 201711461341 A CN201711461341 A CN 201711461341A CN 108192685 B CN108192685 B CN 108192685B
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- Prior art keywords
- line chemical
- chemical decoking
- decoking agent
- hazardous waste
- coking
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an on-line chemical decoking agent based on hazardous waste incineration coking and a decoking process, wherein the on-line chemical decoking agent is prepared from the following substances in percentage by weight: 0.8% -1.2% of copper nitrate, 3.2% -4% of magnesium nitrate, 2% -4% of sodium borate, 1.5% -3.5% of charcoal powder, 0.5% -1% of nano ceramic powder, 1.2% -2.5% of anionic surfactant, 3% -4% of cobalt catalyst and 5% -6% of molybdenum catalyst, and the rest is water, wherein the online chemical decoking process comprises the following steps: (1) pouring the on-line chemical decoking agent into a high-temperature incinerator; (2) under the action of high temperature, the mixture immediately becomes a molten state; (3) copper nitrate, magnesium nitrate and sodium borate directly react with the soot on the heating surface of the high-temperature incinerator; (4) and reacting the charcoal powder and the nano ceramic powder with the residual soot under the catalysis of a cobalt catalyst and a molybdenum catalyst after 3-5 minutes. The invention greatly prolongs the continuous operation time of hazardous waste incineration and greatly improves the productivity.
Description
Technical Field
The invention relates to a decoking agent, in particular to an on-line chemical decoking agent based on hazardous waste incineration coking and a decoking process.
Background
The original burning line is forced to stop for manual treatment when the waste heat boiler cokes to block the flue every operating period, the burning line furnace contains a large amount of refractory materials, so that the temperature is slow to lower and slow to raise, the temperature in the coked materials is high during cleaning, the coked materials are coked on hard stone blocks, and the manual decoking is slow.
As the melting point of the fly ash after the incineration of the hazardous waste is generally 1100-1200 ℃, and the incineration of the hazardous waste requires that the outlet temperature of the secondary combustion chamber reaches more than 1100 ℃, the coking phenomenon exists in all waste heat boilers in the industry. In severe cases, the flue is substantially completely blocked.
Disclosure of Invention
The invention aims to solve the problems and provides an online chemical decoking agent based on hazardous waste incineration coking and a decoking process.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an on-line chemical decoking agent based on hazardous waste incineration coking is prepared from the following substances in percentage by weight:
0.8-1.2% of copper nitrate, 3.2-4% of magnesium nitrate, 2-4% of sodium borate, 1.5-3.5% of charcoal powder, 0.5-1% of nano ceramic powder, 1.2-2.5% of anionic surfactant, 3-4% of cobalt catalyst, 5-6% of molybdenum catalyst and the balance of water.
In a preferred embodiment of the present invention, the content of cobalt in the cobalt catalyst is 5% to 20%.
In a preferred embodiment of the present invention, the content of molybdenum in the molybdenum catalyst is 5% to 20%.
An on-line chemical decoking process based on hazardous waste incineration coking, comprising the following steps:
(1) when the temperature in the high-temperature incinerator reaches 1100 ℃, pouring the on-line chemical decoking agent into the high-temperature incinerator;
(2) when the on-line chemical decoking agent is poured into the high-temperature incinerator, the on-line chemical decoking agent immediately becomes a molten state under the action of high temperature, moisture in the on-line chemical decoking agent immediately becomes steam, and the anionic surfactant can promote copper nitrate, magnesium nitrate, sodium borate, charcoal powder, nano ceramic powder, cobalt catalyst and molybdenum catalyst in the on-line chemical decoking agent to be dispersed to each corner in the high-temperature incinerator along with the steam;
(3) copper nitrate, magnesium nitrate and sodium borate in the on-line chemical decoking agent directly react with the smoke scale on the heating surface of the high-temperature incinerator, and sulfate, sulfite and oxide slagging with extremely strong corrosivity in the smoke scale is changed from weak acidity to weak alkalinity, so that the slagging melting point of the smoke scale is reduced, and the deslagging reaction is carried out in a liquid phase;
(4) after 3-5 minutes, reacting charcoal powder and nano ceramic powder in the linear chemical decoking agent with the residual smoke scale under the catalysis of a cobalt catalyst and a molybdenum catalyst, changing sulfate, sulfite and oxide slagging with extremely strong corrosivity in the residual smoke scale from weak acidity to weak alkalinity, and then removing slag again;
(5) finally, the smoke scale in the high-temperature incinerator is completely fallen off.
The invention has the beneficial effects that:
the invention greatly prolongs the continuous operation time of hazardous waste incineration and improves the productivity.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.
The application provides an on-line chemical decoking agent based on hazardous waste incineration coking, which is prepared from the following substances in percentage by weight:
0.8-1.2% of copper nitrate, 3.2-4% of magnesium nitrate, 2-4% of sodium borate, 1.5-3.5% of charcoal powder, 0.5-1% of nano ceramic powder, 1.2-2.5% of anionic surfactant, 3-4% of cobalt catalyst, 5-6% of molybdenum catalyst and the balance of water.
Wherein the cobalt content in the cobalt catalyst is 5-20%, and the molybdenum content in the molybdenum catalyst is 5-20%
After the online chemical decoking agent is put into the high-temperature incinerator, the chemical decoking agent can be volatilized immediately, so that the online chemical decoking agent can be distributed to all corners in the high-temperature incinerator at once, and the descaling effect is greatly improved.
The application provides an online chemical decoking agent can get rid of the cigarette dirt in the high temperature incinerator completely, and efficiency is very high.
Based on the implementation of the above scheme, the application also provides an online chemical decoking process based on hazardous waste incineration coking, which comprises the following steps:
(1) when the temperature in the high-temperature incinerator reaches 1100 ℃, pouring the on-line chemical decoking agent into the high-temperature incinerator;
(2) when the on-line chemical decoking agent is poured into the high-temperature incinerator, the on-line chemical decoking agent immediately becomes a molten state under the action of high temperature, moisture in the on-line chemical decoking agent immediately becomes steam, and the anionic surfactant can promote copper nitrate, magnesium nitrate, sodium borate, charcoal powder, nano ceramic powder, cobalt catalyst and molybdenum catalyst in the on-line chemical decoking agent to be dispersed to each corner in the high-temperature incinerator along with the steam;
(3) copper nitrate, magnesium nitrate and sodium borate in the on-line chemical decoking agent directly react with the smoke scale on the heating surface of the high-temperature incinerator, and sulfate, sulfite and oxide slagging with extremely strong corrosivity in the smoke scale is changed from weak acidity to weak alkalinity, so that the slagging melting point of the smoke scale is reduced, and the deslagging reaction is carried out in a liquid phase;
(4) after 3-5 minutes, reacting charcoal powder and nano ceramic powder in the linear chemical decoking agent with the residual smoke scale under the catalysis of a cobalt catalyst and a molybdenum catalyst, changing sulfate, sulfite and oxide slagging with extremely strong corrosivity in the residual smoke scale from weak acidity to weak alkalinity, and then removing slag again;
(5) finally, the smoke scale in the high-temperature incinerator is completely fallen off.
Through the real-time of the process, the acidic slagging of the coking smoke scale can be changed into the alkaline slagging, and the alkaline slagging is lower than the acidic slagging in melting point, so that the slagging melting point is reduced, the deslagging reaction is carried out in a liquid phase as far as possible, and all the coking smoke scale can fall off from the high-temperature incinerator.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The on-line chemical decoking process based on hazardous waste incineration coking is characterized by comprising the following steps:
(1) when the temperature in the high-temperature incinerator reaches 1100 ℃, pouring the on-line chemical decoking agent into the high-temperature incinerator; the on-line chemical decoking agent is prepared from the following substances in percentage by weight: 0.8-1.2% of copper nitrate, 3.2-4% of magnesium nitrate, 2-4% of sodium borate, 1.5-3.5% of charcoal powder, 0.5-1% of nano ceramic powder, 1.2-2.5% of anionic surfactant, 3-4% of cobalt catalyst, 5-6% of molybdenum catalyst and the balance of water;
(2) when the on-line chemical decoking agent is poured into the high-temperature incinerator, the on-line chemical decoking agent immediately becomes a molten state under the action of high temperature, moisture in the on-line chemical decoking agent immediately becomes steam, and the anionic surfactant can promote copper nitrate, magnesium nitrate, sodium borate, charcoal powder, nano ceramic powder, cobalt catalyst and molybdenum catalyst in the on-line chemical decoking agent to be dispersed to each corner in the high-temperature incinerator along with the steam;
(3) copper nitrate, magnesium nitrate and sodium borate in the on-line chemical decoking agent directly react with the smoke scale on the heating surface of the high-temperature incinerator, and sulfate, sulfite and oxide slagging with extremely strong corrosivity in the smoke scale is changed from weak acidity to weak alkalinity, so that the slagging melting point of the smoke scale is reduced, and the deslagging reaction is carried out in a liquid phase;
(4) after 3-5 minutes, reacting charcoal powder and nano ceramic powder in the online chemical decoking agent with the residual soot under the catalysis of a cobalt catalyst and a molybdenum catalyst, changing sulfate, sulfite and oxide slagging with extremely strong corrosivity in the residual soot from weak acidity to weak alkalinity, and then removing slag again;
(5) finally, the smoke scale in the high-temperature incinerator is completely fallen off.
2. The on-line chemical decoking process based on hazardous waste incineration coking as claimed in claim 1, wherein the cobalt content in the cobalt catalyst is 5-20%.
3. The on-line chemical decoking process based on hazardous waste incineration coking as claimed in claim 1, wherein the content of molybdenum in the molybdenum catalyst is 5-20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711461341.9A CN108192685B (en) | 2017-12-28 | 2017-12-28 | Online chemical decoking agent and decoking process based on hazardous waste incineration coking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711461341.9A CN108192685B (en) | 2017-12-28 | 2017-12-28 | Online chemical decoking agent and decoking process based on hazardous waste incineration coking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108192685A CN108192685A (en) | 2018-06-22 |
| CN108192685B true CN108192685B (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711461341.9A Active CN108192685B (en) | 2017-12-28 | 2017-12-28 | Online chemical decoking agent and decoking process based on hazardous waste incineration coking |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109812820B (en) * | 2019-03-26 | 2023-09-26 | 中再生环境科技有限公司 | High-temperature on-line coke cleaning device for flue of incineration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EA022995B1 (en) * | 2008-07-18 | 2016-04-29 | Джи Ар Ти, Инк. | Continuous process for converting natural gas to liquid hydrocarbons |
| CN102766498A (en) * | 2012-08-13 | 2012-11-07 | 卢新宇 | Chemical catalyzing decoking agent |
| CN103215101B (en) * | 2013-04-08 | 2014-07-09 | 湖南省湘电试验研究院有限公司 | Decoking and coal-saving additive for supercritical or super-supercritical boiler |
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| CN108192685A (en) | 2018-06-22 |
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