CN102519300A - Method for chemically and circularly cleaning scale inside and outside pipes of evaporating tank and heater in the sugar factory - Google Patents
Method for chemically and circularly cleaning scale inside and outside pipes of evaporating tank and heater in the sugar factory Download PDFInfo
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- CN102519300A CN102519300A CN2011104035148A CN201110403514A CN102519300A CN 102519300 A CN102519300 A CN 102519300A CN 2011104035148 A CN2011104035148 A CN 2011104035148A CN 201110403514 A CN201110403514 A CN 201110403514A CN 102519300 A CN102519300 A CN 102519300A
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Abstract
The invention belongs to a method for cleaning chemical evaporating and heating equipment, in particular to a method for chemically and circularly cleaning the scale inside and outside pipes of an evaporating tank and a heater in the sugar factory. The method is characterized in that the evaporating tank is filled with water, a spraying nozzle is arranged above a gas drum of the evaporating tank and communicated with an outlet of an iron casting clean water pump, a syrup outlet at the bottom of the evaporating tank is communicated with an upper gas drum interface, a lower gas drum interface is communicated with the inlet of the heater, the inlet of the heater is lower than the liquid level in the evaporating tank, the outlet of the heater is communicated with the inlet of a steam chamber, the outlet of the steam chamber is communicated with the inlet of a water pump through a pipe, a venture pipe which is communicated with a sampling basin is connected beside the pipe, hydrochloric acid is filled into the sampling basin, the water pump is started so that the concentration of the hydrochloric acid in cleaning solution is controlled at 0.2-0.5%, and the production velocity of gas from reaction is controlled to be lower than the flow velocity of the liquid in the pipe so that the gas overflows from the inlet of the evaporating tank. The method is easy to operate by consuming least time and labor, adopts the equipment with low investment and can be used for cleaning the scale inside and outside the pipes of the evaporating tank and the heater so that the water in a boiler contains no impurity.
Description
Technical field
The invention belongs to the inside and outside fouling chemical cycle cleaning method of cleaning facility, particularly sugar refinery evaporator and heater tube of chemical industry evaporation firing equipment.
Background technology
Present domestic sugar refinery is in operation, and the inside and outside wall of evaporator and heater heat-exchange tube can produce a large amount of incrustation with production process, badly influences rate of heat exchange.Sugar refinery is because the existence of incrustation and dealing with improperly, and its production efficiency has been lost about 40～50 ℅, that is to say that fermented glutinour rice (alcohol) tower incrustation is handled well, just can remedy this part loss if to boiler, heater, the evaporator in sugar refinery.In a word, the incrustation of sugar mill equipment is perplexing the production in sugar refinery, causes productivity ratio low, cost high with the having some setbacks of production technology; During season was pressed in sugar refinery, boiler must guarantee uninterrupted steam supply and the bagasse that burns, and incrustation has caused the too much waste of this precious resources of bagasse, and made the CO2 emissions surge, did not conform to the national environmental protection theory of current energy-saving and emission-reduction.
The conventional method of removing evaporator incrustation is to adopt high-pressure spray gun; Insert injection removing in the heating tube that gathers on the card by manually-operated; During operating cost, effort, cost of equipment is higher, and often has many heating tubes to be omitted in the cleaning process; High-pressure spray gun can not clean the outer incrustation of heating tube in addition, can not clean the inside and outside wall of the heat-exchange tube of heater.
In order to solve over the problem that the sugar dirt of sugar refinery evaporator exists in cleaning; The applicant has proposed the patent application of " cyclic cleaning method and the scavenger of calcium dirt " (application number 91105475.8) in 1991; This technical scheme has solved the high-pressure spray gun ablution preferably and has omitted the problem that heating tube is cleaned; And the operation save time, laborsaving, receive the welcome in vast sugar refinery deeply.However, applicant has found applications for many years, there are some major problems remain unresolved, namely ① the patented process and the high-pressure spray gun cleaning method can only clean the heat exchanger tube evaporators inner scale accumulation of sugar, not the product of the outer wall of the tube dirt cleaning; ② can not simultaneously heater heat exchanger tubes, the outer wall fouling cleaning; ③ current sugar water mostly from the boiler into the furnace 1 #, 2 # evaporator condensate tank drum Qi, an evaporation tank # sugar steam evaporation can be entered # 2 Qi heating drum, so evaporation tank # 2 heat exchange tube outer wall slimy a lot of sugar scale, when the rotation evaporation cans # 2 # 1 evaporators as when used by the turbine to Gao Wen pure power of steam Qi slimy outer wall of the tube dirt dissolving sugar dissolved in water vapor and, therefore suspect this steam drum steam contains a lot of water in the morning and sugar, into the furnace of the boiler water does not meet the operating specifications.
Summary of the invention
The purpose of this invention is to provide the inside and outside fouling chemical cycle cleaning method of a kind of improved sugar refinery evaporator and heater tube, its operation saves time, laborsaving, can clean fouling inside and outside the pipe of evaporator and heater, and can guarantee that boiler goes into stove water and do not contain impurity.
Realize that the technical scheme that above-mentioned purpose of the present invention is taked is: the water of in evaporator, packing into, the tympanites top dress shower nozzle of evaporator, shower nozzle is communicated with the outlet of cast iron clarified water pump; Syrup outlet at the bottom of the evaporator is communicated with tympanites and goes up interface, and enraged lower interface is communicated with the heater import, and the heater import is lower than liquid level in the evaporator; Heater outlet is communicated with the steam chest import, and the steam chest outlet is communicated with pump entrance and the other Venturi tube that passes to the sampling basin in succession of this segment pipe, the hydrochloric acid of packing in the sampling basin with pipeline; The starting water pump; Make the hydrochloric acid weight concentration of cleaning fluid be controlled at 0.2～0.5%, and control reaction aerogenesis speed let gas overflow from the evaporator manhole less than the pipeline liquid flow velocity.
All dispose valve on each section connection pipeline of the present invention, control reaction aerogenesis speed less than the pipeline liquid flow velocity through control valve, whole scavenging period is 3～4 hours.Pack in the sampling basin and also adorn the corrosion inhibiter of forming if any macromolecule phenyl ring, heterocycle mixture.
During starting mode of pump, Venturi tube can suck the salt acid scavenger in the sampling basin in the water pump, is transported to the shower nozzle of evaporator continually through pipeline; Be sprayed into evaporator, to cleaning in the heat-exchange tube, the syrup of cleaning fluid at the bottom of the jar exports out; Get into tympanites through piping and go up interface, in tympanites,, come out by enraged lower interface again cleaning outside the heat-exchange tube; Under the gravity effect of difference in height, cleaning fluid gets into the heater import, through the connection of pipeline in evaporator; Clean the pipe of whole heater is inside and outside, accomplish evaporator and the inside and outside wash cycles of heater tube.
The present technique scheme can be cleaned a series of heaters, and its method of attachment is: the heater import of a heater after the steam chest outlet of last heater connects with pipeline, the steam chest outlet of top heater connects pump entrance with pipeline.
The beneficial effect of the invention is: 1. except can be to cleaning in the heat-exchange tube of evaporator, also can be to managing outer the cleaning, and expand to can be simultaneously to the inside and outside cleaning of heater tube; 2. operation save time, laborsaving, clean thoroughly and effective, not influenced by human factor, can in 3～4 hours, accomplish evaporator and the inside and outside whole wash cycles of heater tube; 3. equipment investment is few, processing ease; 4. can guarantee that sugar refinery boiler goes into the requirement that the evaporator almost drum condensed water of stove reaches pure water.
Description of drawings
Fig. 1 is an apparatus arrangement sketch map of the present invention.
Among the figure: interface 7, pipeline 8, heater import 9, heater outlet 10, valve 11,12, No. 2 heaters 13 of steam chest import, water pump 14, motor 15, Venturi tube 16, sampling basin 17,18, No. 1 heater 19 of barrel, steam chest outlet 20 on syrup outlet 1, enraged lower interface 2, tympanites 3, shower nozzle 4, evaporator 5, manhole 6, the tympanites.
The specific embodiment
Referring to Fig. 1, apparatus arrangement of the present invention is put this and is done, shower nozzle 4 is equipped with in tympanites 3 tops of evaporator 5, and shower nozzle 4 connects water pump 14 outlets through pipeline 8 through manhole 6, and when the state of cleaning, manhole 6 is in opening-wide state, is beneficial to reaction product gas and overflows.The syrup outlet 1 usefulness pipeline 8 of evaporator 5 bottoms connects tympanites and goes up interface 7, and the cleaning fluid that makes out then cleans the heat-exchange tube outer wall in the tympanites 3.Tympanites lower interface 2 usefulness pipelines 8 connection heater imports 9, the height of heater import 9 is lower than liquid level in the evaporator, and the cleaning fluid in the evaporator just can get under the gravity effect in No. 1 heater 19 and No. 2 heaters 13.Heater outlet 10 usefulness pipelines 8 connect steam chest import 12, and cleaning fluid then heats the steam chest of heater.The steam chest outlet 20 usefulness pipelines 8 of No. 1 heater 19 connect the heater import 9 of No. 2 heaters 13, can adopt this connected mode that many heater series connection are cleaned.The steam chest outlet 20 usefulness pipelines 8 of top heater connect the inlet of water pump 14, and the other Venturi tube 16 that connect on steam chest outlet 20 to the pipeline 8 between the inlet of water pump 14 when water pump 14 work, can suck the salt acid scavenger in the sampling basin 17 in the cleaning fluid system.On each section connection pipeline 8, all dispose valve 11, can change the cleaning fluid flow, make the speed of the flow velocity of liquid, avoided the moving middle air-resistance phenomenon that produces of liquid circulation flow greater than reaction back aerogenesis through control valve.
Claims (3)
1. the inside and outside fouling chemical cycle cleaning method of sugar refinery evaporator and heater tube is characterized in that: the water of in evaporator, packing into, the tympanites top dress shower nozzle of evaporator; Shower nozzle is communicated with the outlet of cast iron clarified water pump, and the syrup outlet at the bottom of the evaporator is communicated with tympanites and goes up interface, and enraged lower interface is communicated with the heater import; And the heater import is lower than liquid level in the evaporator; Heater outlet is communicated with the steam chest import, and the steam chest outlet is communicated with pump entrance and the other Venturi tube that passes to the sampling basin in succession of this segment pipe, the hydrochloric acid of packing in the sampling basin with pipeline; The starting water pump; Make the hydrochloric acid weight concentration of cleaning fluid be controlled at 0.2～0.5%, and control reaction aerogenesis speed let gas overflow from the evaporator manhole less than the pipeline liquid flow velocity.
2. by claim 1 described sugar refinery evaporator and the inside and outside fouling chemical cycle cleaning method of heater tube; It is characterized in that: on each section connection pipeline, all dispose valve; Control reaction aerogenesis speed less than the pipeline liquid flow velocity through control valve, whole scavenging period is 3～4 hours.
3. by claim 2 described sugar refinery evaporator and the inside and outside fouling chemical cycle cleaning method of heater tube, it is characterized in that: pack in the sampling basin and also adorn the corrosion inhibiter of forming if any macromolecule phenyl ring, heterocycle mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110403514 CN102519300B (en) | 2011-12-07 | 2011-12-07 | Method for chemically and circularly cleaning scale inside and outside pipes of evaporating tank and heater in the sugar factory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110403514 CN102519300B (en) | 2011-12-07 | 2011-12-07 | Method for chemically and circularly cleaning scale inside and outside pipes of evaporating tank and heater in the sugar factory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102519300A true CN102519300A (en) | 2012-06-27 |
| CN102519300B CN102519300B (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110403514 Expired - Fee Related CN102519300B (en) | 2011-12-07 | 2011-12-07 | Method for chemically and circularly cleaning scale inside and outside pipes of evaporating tank and heater in the sugar factory |
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| CN (1) | CN102519300B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534919A (en) * | 2014-11-24 | 2015-04-22 | 河南巨龙生物工程股份有限公司 | Method for simultaneously conducting descaling and leakage detection on fermentation tank coil |
| CN105605966A (en) * | 2016-01-07 | 2016-05-25 | 广西农垦糖业集团西江制糖有限公司 | Cleaning method for evaporating tank for sugar |
| CN106705746A (en) * | 2016-12-29 | 2017-05-24 | 广西恩康机械设备有限公司 | Multi-gun tubular heat exchanger intelligent cleaning robot |
| CN106984055A (en) * | 2017-05-25 | 2017-07-28 | 广东沃泰环保有限公司 | It is a kind of can on-line cleaning shell and tube forced-circulation evaporation device and its cleaning method |
| CN110986660A (en) * | 2019-12-16 | 2020-04-10 | 平顶山金晶生物科技股份有限公司 | Cleaning agent and cleaning method for surface scale of heat exchange tube in concentration evaporation device |
| CN112157056A (en) * | 2020-09-04 | 2021-01-01 | 大唐韩城第二发电有限责任公司 | Method of on-line acid pickling deslagging device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069296A (en) * | 1991-08-12 | 1993-02-24 | 刘沣 | The cyclic cleaning method of calcium dirt and scavenging agent |
| CN1192466A (en) * | 1997-03-01 | 1998-09-09 | 罗国明 | Detergent for cleaning evaporating pot of sugar mill and method for cleaning it |
| CA2555451A1 (en) * | 2006-08-03 | 2008-02-03 | David Shrader Mann | Flue pan washer for maple sugar evaporator |
| JP2009250565A (en) * | 2008-04-09 | 2009-10-29 | Clean Maitenance:Kk | Automatic cleaning device for heat exchanger |
-
2011
- 2011-12-07 CN CN 201110403514 patent/CN102519300B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069296A (en) * | 1991-08-12 | 1993-02-24 | 刘沣 | The cyclic cleaning method of calcium dirt and scavenging agent |
| CN1192466A (en) * | 1997-03-01 | 1998-09-09 | 罗国明 | Detergent for cleaning evaporating pot of sugar mill and method for cleaning it |
| CA2555451A1 (en) * | 2006-08-03 | 2008-02-03 | David Shrader Mann | Flue pan washer for maple sugar evaporator |
| JP2009250565A (en) * | 2008-04-09 | 2009-10-29 | Clean Maitenance:Kk | Automatic cleaning device for heat exchanger |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534919A (en) * | 2014-11-24 | 2015-04-22 | 河南巨龙生物工程股份有限公司 | Method for simultaneously conducting descaling and leakage detection on fermentation tank coil |
| CN104534919B (en) * | 2014-11-24 | 2016-03-16 | 河南巨龙生物工程股份有限公司 | A kind of method of simultaneously carrying out the scale removal of fermentation tank coil pipe and leak detection |
| CN105605966A (en) * | 2016-01-07 | 2016-05-25 | 广西农垦糖业集团西江制糖有限公司 | Cleaning method for evaporating tank for sugar |
| CN105605966B (en) * | 2016-01-07 | 2018-04-10 | 广西农垦糖业集团西江制糖有限公司 | A kind of cleaning method of sugar evaporator |
| CN106705746A (en) * | 2016-12-29 | 2017-05-24 | 广西恩康机械设备有限公司 | Multi-gun tubular heat exchanger intelligent cleaning robot |
| CN106984055A (en) * | 2017-05-25 | 2017-07-28 | 广东沃泰环保有限公司 | It is a kind of can on-line cleaning shell and tube forced-circulation evaporation device and its cleaning method |
| CN110986660A (en) * | 2019-12-16 | 2020-04-10 | 平顶山金晶生物科技股份有限公司 | Cleaning agent and cleaning method for surface scale of heat exchange tube in concentration evaporation device |
| CN112157056A (en) * | 2020-09-04 | 2021-01-01 | 大唐韩城第二发电有限责任公司 | Method of on-line acid pickling deslagging device |
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| Publication number | Publication date |
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| CN102519300B (en) | 2013-05-15 |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20120627 Assignee: Yunnan Tiexin Agricultural Science and Technology Development Co.,Ltd. Assignor: Liu Feng Contract record no.: 2013530000038 Denomination of invention: Method for chemically and circularly cleaning scale inside and outside pipes of evaporating tank and heater in the sugar factory License type: Exclusive License Record date: 20130427 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20131207 |