CN103468420A - Weak acid cleaner and application thereof to removal of GGH (gas-gas heater) hard scale - Google Patents
Weak acid cleaner and application thereof to removal of GGH (gas-gas heater) hard scale Download PDFInfo
- Publication number
- CN103468420A CN103468420A CN2013103812868A CN201310381286A CN103468420A CN 103468420 A CN103468420 A CN 103468420A CN 2013103812868 A CN2013103812868 A CN 2013103812868A CN 201310381286 A CN201310381286 A CN 201310381286A CN 103468420 A CN103468420 A CN 103468420A
- Authority
- CN
- China
- Prior art keywords
- weak acid
- ggh
- cleaner
- agent
- acid pickling
- 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
Landscapes
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to a cleaner and discloses a weak acid cleaner. The weak acid cleaner comprises the following raw materials in percentage by mass: 20-30% of a main cleaner, 0.3-1.0% of a sweller, 1-3% of an auxiliary cleaner, 0.1-1.0% of a metal corrosion inhibitor, 0.5-1.0% of a surfactant and the balance of water. The invention further discloses a method for preparing the weak acid cleaner. Meanwhile, the invention discloses a method for removing GGH (gas-gas heater) hard scale by the weak acid cleaner. The weak acid cleaner can be used for thoroughly removing slightly soluble salt deposits such as sulfate and silicate in a GGH, does not corrode enamel, glass or the like, and does not have an adverse reaction when contacted with a human body; waste liquid after scale removal can be directly discharged into a wastewater treatment system of a power plant; the weak acid cleaner only needs to be used for removing the scale at normal temperature without being heated by steam, and is short in cleaning cycle and high in cleaning efficiency; the light transmittance reaches 100% and the scale removal rate is more than 98%; compared with a conventional GGH cleaner, the cost is reduced by more than 50%.
Description
Technical field
The present invention relates to clean-out system, especially relate to a kind of weak acid pickling agent that GGH (Ga s-Gas Heater, flue gas heat-exchange unit) is cleaned.
Background technology
GGH (Gas-Gas Heater, flue gas heat-exchange unit) is one of main device in Coalsteam plant with FGD system (FGD).Its effect is to utilize former flue gas that the clean flue gas after desulfurization is heated, and funnel temperature is reached on acid dew point, alleviates the corrosion to clean flue gas flue and chimney, improves the diffusibleness of pollutent; Reduce the flue-gas temperature that enters absorption tower simultaneously, reduce in tower the requirement of rot-resistant Technology.
GGH is as the important device of heat-engine plant wet desulfurization, and its enamel heat transfer element surface fouling and obstruction easily occurs and causes moving the differential pressure increase, causes the booster fan electric current to increase, and it has become the key issue that can desulfurizer move for a long time continuously.After the fouling of GGH heat-transfer surface, its reduction of heat exchange efficiency, the former flue-gas temperature that enters thionizer surpasses design load, the absorption tower water loss increases, the temperature of clean flue gas does not reach requirement, easily downstream installation is caused to corrosion, affects the diffusion of rising height and the pollutent of flue gas.This just need to utilize matting to be cleaned.
The traditional chemical cleaning technique is mainly pickling or the alkali cleaning of using hydrofluoric acid or highly basic etc. to carry out, strong acid and strong base all has larger disadvantageous effect to human body, equipment and environment, will adopt respectively acidity or alkaline clean-out system for silicate deposition and sulfate scale, operating process is cumbersome simultaneously.And on market, existing employing GGH scavenger specially carries out matting in conjunction with alkali washing process, this purging method cleaning interval was longer, for up to 20 days.
Summary of the invention
For overcoming existing clean-out system cleaning interval length, the lower shortcoming of cleaning efficiency (descaling rate), the invention provides the weak acid pickling agent that a kind of cleaning interval is short, cleaning efficiency (descaling rate) is high.
The objective of the invention is to realize by following technical measures, a kind of weak acid pickling agent, raw material by following mass percent forms: clean host 20-30%, raising agent 0.3～1.0%, washing assistant 1～3%, metal inhibitor 0.1～1.0%, tensio-active agent 0.5～1.0%, surplus is water.
Concrete, the mineral acid that described cleaning host is one or more, and the acidic substance of one or more organic acid mixing; Described raising agent is EDETATE DISODIUM; Described washing assistant is SODIUMNITRATE or saltpetre; Described metal inhibitor is any one or more the mixing in vulkacit H, thiocarbamide, dipropyl sulfide; Described tensio-active agent is any one or more the mixing in OP-10, TX-10, fatty alcohol-polyoxyethylene ether phosphate monoester sodium.
The invention also discloses the method for the above-mentioned weak acid pickling agent of preparation, it comprises the following steps:
(1) raising agent, metal inhibitor, tensio-active agent are dissolved in suitable quantity of water, stir and make alkaline mixed solution A;
(2) will clean host, washing assistant is dissolved in all the other water, stir and make mixing solutions B;
(3) above two kinds of solution being mixed rear is 0.8～1.0 by sodium carbonate adjusting pH value, obtains the weak acid pickling agent;
Above steps is all carried out under 50～60 ℃ of normal heating conditions;
All process for preparation must stir while feeding in raw material.
The invention also discloses the method for using above-mentioned weak acid pickling agent to carry out the hard scale cleaning, it comprises the following steps:
(1) utilize the high pressure water washing of pressure at 20-30Mpa, for removing GGH knot ash;
(2) utilize the weak acid pickling agent to soak GGH24 hour;
(3) utilize the high pressure water washing of pressure at 20-30Mpa;
(4) use weak acid pickling agent 100% stoste chemical immersion GGH12 hour;
(5) utilize the high pressure water washing of pressure at 20-30Mpa;
(6) checking whether hard scale removing situation reaches standard for acceptance, is to complete; Otherwise repeat the operation of above step (4) and (5) item, until the removing of GGH hard scale is qualified.
The present invention removes the weak acid pickling agent of GGH hard scale mainly by multiple organic-inorganic mixing acid, be exclusively used in indissoluble salt crust such as removing vitriol and silicate, clean-out system pH value is 0.80-1.00, the removing hard scale is thorough, do not corrode enamel, glass etc., to human body, contact has no adverse reaction, and the waste liquid after cleaning can directly enter system for treating wastewater from power plant; Clean-out system of the present invention does not need steam to urge temperature only to need normal temperature to clean.Cleaning interval of the present invention short (3～5 days); Cleaning efficiency is high, and transmittance reaches 100%, and descaling rate is more than 98%; Compare to existing GGH clean-out system simultaneously, cost of the present invention more than 50%.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
A kind of weak acid pickling agent is comprised of the raw material of following mass percent: clean host 20-30%, and raising agent 0.3～1.0%, washing assistant 1～3%, metal inhibitor 0.1～1.0%, tensio-active agent 0.5～1.0%, surplus is water.
In a preferred embodiment of the invention, the mineral acid (as dilute hydrochloric acid) that cleaning host is one or more, and the acidic substance (as oxalic acid, citric acid etc.) of one or more organic acid mixing; Described raising agent is EDETATE DISODIUM; Described washing assistant is SODIUMNITRATE or saltpetre; Described metal inhibitor is any one or more the mixing in vulkacit H, thiocarbamide, dipropyl sulfide; Described tensio-active agent is any one or more the mixing in OP-10, TX-10, fatty alcohol-polyoxyethylene ether phosphate monoester sodium.
The preparation method of above-mentioned weak acid pickling agent, it comprises the following steps:
(1) raising agent, metal inhibitor, tensio-active agent are dissolved in suitable quantity of water, stir and make alkaline mixed solution A;
(2) will clean host, washing assistant is dissolved in all the other water, stir and make mixing solutions B;
(3) above two kinds of solution being mixed rear is 0.8～1.0 by sodium carbonate adjusting pH value, obtains the weak acid pickling agent;
Above steps is all carried out under 50～60 ℃ of normal heating conditions;
All process for preparation must stir while feeding in raw material.
Use above-mentioned weak acid pickling agent to carry out the method for GGH hard scale cleaning, it comprises the following steps:
(1) utilize the high pressure water washing of pressure at 20-30Mpa, for removing the knot ash on GGH;
(2) utilize above-mentioned weak acid pickling agent to soak GGH24 hour;
(3) utilize the high pressure water washing of pressure at 20-30Mpa;
(4) use this weak acid pickling agent 100% stoste chemical immersion GGH12 hour;
(5) utilize the high pressure water washing of pressure at 20-30Mpa;
(6) checking whether hard scale removing situation reaches standard for acceptance, is to complete; Otherwise repeat the operation of above step (4) and (5) item, until the removing of GGH hard scale is qualified.
The clean-out system of the present invention's processing mainly is comprised of multiple organic-inorganic mixing acid the slightly acidic that the pH value is 0.80-1.00, for removing the indissoluble salt crust such as vitriol and silicate, the removing hard scale is thorough, can not corrode enamel, glass etc., to human body, contact has no adverse reaction, and the waste liquid after cleaning can directly enter system for treating wastewater from power plant, and the use function of the GGH original paper after cleaning is just the same with new original paper, greatly extended the parallel-adder settle-out time of electric power factory equipment, its benefit is apparent; Clean-out system of the present invention does not need steam to urge temperature only to need normal temperature to clean; Cleaning interval of the present invention short (3～5 days); Cleaning efficiency is high, and transmittance reaches 100%, and descaling rate is more than 98%; Raw materials for production are cheap, press the current market value of starting material, the cost of per kilogram clean-out system, below 3 yuans, compares to existing GGH clean-out system (cost of per kilogram clean-out system is 6 yuans of left and right) simultaneously, cost of the present invention more than 50%.
More than that weak acid pickling agent of the present invention and the application in the GGH hard scale cleans thereof are set forth; for helping to understand the present invention; but embodiments of the present invention are not restricted to the described embodiments; anyly do not deviate from the change done under the principle of the invention, modification, substitute, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (4)
1. a weak acid pickling agent, it is characterized in that: the raw material by following mass percent forms:
Clean host 20-30%, raising agent 0.3～1.0%, washing assistant 1～3%, metal inhibitor 0.1～1.0%, tensio-active agent 0.5～1.0%, surplus is water.
2. weak acid pickling agent according to claim 1 is characterized in that:
The mineral acid that described cleaning host is one or more, and the acidic substance of one or more organic acid mixing;
Described raising agent is EDETATE DISODIUM;
Described washing assistant is SODIUMNITRATE or saltpetre;
Described metal inhibitor is any one or more the mixing in vulkacit H, thiocarbamide, dipropyl sulfide;
Described tensio-active agent is any one or more the mixing in 0P-10, TX-10, fatty alcohol-polyoxyethylene ether phosphate monoester sodium.
3. a method for preparing the described weak acid pickling agent of claim 1 or 2 is characterized in that comprising the following steps:
(1) raising agent, metal inhibitor, tensio-active agent are dissolved in suitable quantity of water, stir and make alkaline mixed solution A;
(2) will clean host, washing assistant is dissolved in all the other water, stir and make mixing solutions B;
(3) above two kinds of solution being mixed rear is 0～1.0 by sodium carbonate adjusting pH value, obtains the weak acid pickling agent;
Above steps is all carried out under 50～60 ℃ of normal heating conditions;
All process for preparation must stir while feeding in raw material.
4. a right to use requires the method that the cleaning of GGH hard scale is carried out in 1 or 2 described weak acid pickling agent, it is characterized in that comprising the following steps:
(1) utilize the high pressure water washing of pressure at 20-30Mpa, for removing GGH knot ash;
(2) utilize the weak acid pickling agent to soak GGH24 hour;
(3) utilize the high pressure water washing of pressure at 20-30Mpa;
(4) use weak acid pickling agent 100% stoste chemical immersion GGH12 hour;
(5) utilize the high pressure water washing of pressure at 20-30Mpa;
(6) checking whether hard scale removing situation reaches standard for acceptance, is to complete; Otherwise repeat the operation of above step (4) and (5) item, until the removing of GGH hard scale is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103812868A CN103468420A (en) | 2013-08-20 | 2013-08-20 | Weak acid cleaner and application thereof to removal of GGH (gas-gas heater) hard scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103812868A CN103468420A (en) | 2013-08-20 | 2013-08-20 | Weak acid cleaner and application thereof to removal of GGH (gas-gas heater) hard scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103468420A true CN103468420A (en) | 2013-12-25 |
Family
ID=49793465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103812868A Pending CN103468420A (en) | 2013-08-20 | 2013-08-20 | Weak acid cleaner and application thereof to removal of GGH (gas-gas heater) hard scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103468420A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388959A (en) * | 2014-10-31 | 2015-03-04 | 无锡贺邦金属制品有限公司 | Metal cleaning fluid and preparation method thereof |
| CN104611160A (en) * | 2015-01-05 | 2015-05-13 | 江苏科技大学 | Power station chimney GGH cleaning agent |
| CN106800951A (en) * | 2017-01-12 | 2017-06-06 | 廊坊盛迪化工有限公司 | A kind of flue gas dirt matter dispersant and its compound method |
| CN108546953A (en) * | 2018-05-09 | 2018-09-18 | 北京乐文科技发展有限公司 | A kind of heating furnace tube outer wall washing passivator |
| CN109207924A (en) * | 2018-11-06 | 2019-01-15 | 镇江东艺机械有限公司 | A kind of compound PVD preparation technology of coating for high speed cutting tool |
| CN110735144A (en) * | 2019-09-30 | 2020-01-31 | 上海柯灵展新化工有限公司 | acidic cleaning agent for food factory pipelines and preparation method and application thereof |
| CN110736385A (en) * | 2019-10-30 | 2020-01-31 | 刘新存 | Novel scale removal process for cubic packing of cooling water towers in power plants |
| CN111647893A (en) * | 2020-05-13 | 2020-09-11 | 河北冀研能源科学技术研究院有限公司 | Efficient descaling agent for turbine blades of supercritical generator set |
| CN113502195A (en) * | 2021-08-09 | 2021-10-15 | 朗森特环境科技(山东)有限公司 | Preparation method of neutral cleaning agent for cleaning evaporative condenser |
| CN114410395A (en) * | 2022-02-16 | 2022-04-29 | 湖北美和科技有限公司 | Synthesis method of biomass boiler corrosion-inhibition ash cleaning agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130722A (en) * | 2007-08-10 | 2008-02-27 | 于金田 | Noncorrosive detergent of heat distribution system |
| CN101555441A (en) * | 2008-04-09 | 2009-10-14 | 中国神华能源股份有限公司 | Cleaning agent and cleaning process of GGH heat exchange component |
| CN101892489A (en) * | 2010-07-23 | 2010-11-24 | 广州唯普电力科技有限公司 | Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof |
| CN103224841A (en) * | 2013-05-15 | 2013-07-31 | 大唐淮北发电厂 | Cleaning agent for desulfurized flue gas heat exchangers |
-
2013
- 2013-08-20 CN CN2013103812868A patent/CN103468420A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130722A (en) * | 2007-08-10 | 2008-02-27 | 于金田 | Noncorrosive detergent of heat distribution system |
| CN101555441A (en) * | 2008-04-09 | 2009-10-14 | 中国神华能源股份有限公司 | Cleaning agent and cleaning process of GGH heat exchange component |
| CN101892489A (en) * | 2010-07-23 | 2010-11-24 | 广州唯普电力科技有限公司 | Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof |
| CN103224841A (en) * | 2013-05-15 | 2013-07-31 | 大唐淮北发电厂 | Cleaning agent for desulfurized flue gas heat exchangers |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388959A (en) * | 2014-10-31 | 2015-03-04 | 无锡贺邦金属制品有限公司 | Metal cleaning fluid and preparation method thereof |
| CN104611160A (en) * | 2015-01-05 | 2015-05-13 | 江苏科技大学 | Power station chimney GGH cleaning agent |
| CN106800951A (en) * | 2017-01-12 | 2017-06-06 | 廊坊盛迪化工有限公司 | A kind of flue gas dirt matter dispersant and its compound method |
| CN106800951B (en) * | 2017-01-12 | 2018-10-09 | 廊坊盛迪化工有限公司 | A kind of flue gas dirt matter dispersant and its preparation method |
| CN108546953A (en) * | 2018-05-09 | 2018-09-18 | 北京乐文科技发展有限公司 | A kind of heating furnace tube outer wall washing passivator |
| CN109207924A (en) * | 2018-11-06 | 2019-01-15 | 镇江东艺机械有限公司 | A kind of compound PVD preparation technology of coating for high speed cutting tool |
| CN110735144A (en) * | 2019-09-30 | 2020-01-31 | 上海柯灵展新化工有限公司 | acidic cleaning agent for food factory pipelines and preparation method and application thereof |
| CN110736385A (en) * | 2019-10-30 | 2020-01-31 | 刘新存 | Novel scale removal process for cubic packing of cooling water towers in power plants |
| CN110736385B (en) * | 2019-10-30 | 2021-12-03 | 刘新存 | Descaling process for cubic filler of cooling tower in power plant |
| CN111647893A (en) * | 2020-05-13 | 2020-09-11 | 河北冀研能源科学技术研究院有限公司 | Efficient descaling agent for turbine blades of supercritical generator set |
| CN113502195A (en) * | 2021-08-09 | 2021-10-15 | 朗森特环境科技(山东)有限公司 | Preparation method of neutral cleaning agent for cleaning evaporative condenser |
| CN114410395A (en) * | 2022-02-16 | 2022-04-29 | 湖北美和科技有限公司 | Synthesis method of biomass boiler corrosion-inhibition ash cleaning agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103468420A (en) | Weak acid cleaner and application thereof to removal of GGH (gas-gas heater) hard scale | |
| CN102703233B (en) | Cleaning agent for calcium sulfate scale | |
| CN101892489B (en) | Cleaning agent for flue dust scale on surface of gas heat exchanger of gas desulfurization system and preparation method thereof | |
| CN106731614A (en) | A kind of method and apparatus of flue gas desulfurization and denitrification | |
| CN105937765B (en) | A kind of the burning quenching apparatus and method of processing high viscosity strong corrosive salt bearing liquid wastes | |
| CN110160392A (en) | A kind of on-line cleaning method of plate heat exchanger | |
| CN104745337A (en) | Neutral chemical cleaning agent for eliminating hard scales of air pre-heater of desulfurization system and preparation method of neutral chemical cleaning agent | |
| CN101463481B (en) | Acid rust remover | |
| CN101274803A (en) | Softener for station boiler sediment incrustation and two-stage incrustation-removing method | |
| CN109806751B (en) | Low-energy-consumption coal-fired boiler flue gas whitening system | |
| CN102534641A (en) | Organic acid cleaning agent and manufacture method thereof | |
| CN204582856U (en) | Waste gas purification apparatus | |
| CN106221965B (en) | One kind being used for gas/gas heat exchanger of wet desulphurization incrustation cleaning agent | |
| CN101914416B (en) | Water-based neutral cleaning agent and application thereof in cleaning GGH heat exchange component | |
| JP2007277455A (en) | Method for treating released polymer wax waste fluid | |
| CN101705159B (en) | Cleaning agent | |
| CN1116911C (en) | Antiscaling process for ash-water pipeline of heat and power plant | |
| CN102296008A (en) | Neutral cleaning agent for cleaning scaling substances on GGH (gas-gas heater) of flue gas desulphurization system | |
| CN106989633A (en) | A kind of cleaning method of raw gas heat exchange heat exchanger used | |
| CN108300620A (en) | Cleaning agent and preparation method thereof, purposes | |
| CN104084120A (en) | Industrial waste-modified ammonia scavenger | |
| CN103215153B (en) | Scale remover of flue gas reheater in flue gas desulfurization system | |
| CN210993719U (en) | White smoke-flue gas deacidification integration processing system disappears | |
| CN108641828A (en) | A kind of calcium method desulfurizing tower scale remover and application | |
| CN103641246A (en) | Environment-friendly type boiler scale remover and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131225 |