CN108212958A - A kind of on-line cleaning method of coal gas water cooler - Google Patents
A kind of on-line cleaning method of coal gas water cooler Download PDFInfo
- Publication number
- CN108212958A CN108212958A CN201711472002.0A CN201711472002A CN108212958A CN 108212958 A CN108212958 A CN 108212958A CN 201711472002 A CN201711472002 A CN 201711472002A CN 108212958 A CN108212958 A CN 108212958A
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- Prior art keywords
- water cooler
- compressed air
- water
- coal gas
- valve
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Cleaning In General (AREA)
Abstract
The present invention relates to Cleaning Technologies of Chemical Apparatus fields, especially a kind of on-line cleaning method of coal gas water cooler, pass through external compressed air pipe at water cooler outlet, using continous way compressed air or the impulsive compressional air of 3 10Hz, under 0.12 0.2MPa pressure conditions, with the dirt inside the cooling water backwashing water cooler of reflux, substantially increase the efficiency of water cooler on-line cleaning, dirt cleaning rate can reach more than 90%, the safety of on-line cleaning is also ensured simultaneously, reduces the risk and cost of cleaning water cooler.
Description
Technical field
The present invention relates to Cleaning Technologies of Chemical Apparatus field, especially a kind of on-line cleaning method of coal gas water cooler.
Background technology
Ammonia synthesizing industry occupies an important position in national economy, other than liquid nitrogen can be directly as fertilizer, agriculturally makes
Nitrogenous fertilizer, such as urea, ammonium nitrate, ammonium phosphate, ammonium chloride and various containing nitrogen composite fertilizer, are all using ammonia as raw material.Synthesis
The production process of ammonia mainly includes：(1) gas making：It prepares containing H2、N2Unstripped gas；(2) it purifies：It removes other in unstripped gas
Impurity；(3) it compresses and synthesizes：By qualified H2、N2Mixed pressure is reduced under high pressure conditions, is closed under conditions of iron series catalysts
Ammonification.
And in Gas-making, H2The preparation of unstripped gas includes part strong exothermal reaction, so needing by being segmented reaction
To recycle heat for subsequent technique, the equipment of gas recovery heat is mainly water cooler.H2Unstripped gas is by low-pressure machine with 0.3MPa
Pressure convey into water cooler, interlock reverse heat-exchange with the cooling water inside water cooler.Water cooler changes after long-play
The thermal efficiency can decline.The reason is that the water as cooling agent, is a kind of strong solvent of dissolubility, dissolved with many objects in natural environment
Matter, such as calcium ion, magnesium ion, ferrous ion, carbanion, oxygen, bacterium, impurity, silt, colloid substances, suspended matter.This
A little substances can cause equipment scaling, internal deposition, oxygen corrosion, blocking, influence the efficiency of Heat transmission, cause the increasing of energy expenditure
Add, so must be driven off various impurity in water, reach the requirement of industrial water.For this purpose, add in a certain amount of scale inhibition in cooling water
The medicaments such as corrosion inhibiter, Biocidal algae-killing agent, to ensure water quality qualification.But in actual process, these medicaments can not be complete
The full impurity removed in water, the inside of water cooler still has incrustation and mud is attached in heat exchange pipe outer wall, influences its heat exchange effect
Rate.
Hereafter, physical cleaning or chemical cleaning are carried out to water cooler, but needs to carry out parking process, cost to production system
It is larger and complicated for operation；The mode for attempting that cooling water is taken to flow back in online production again cleans water cooler, but effect is still unknown
It is aobvious.
Invention content
In order to solve technical problem in the prior art, the present invention provides a kind of on-line cleanings of coal gas water cooler
Method.
It is achieved particular by following technical scheme：
A kind of on-line cleaning method of coal gas water cooler, includes the following steps：
(1) cleaning pre-sets：Water supply valve is closed, opens backwash outlet valve, cooling water flows back to water cooler；
(2) aerating is cleaned：Compressed air valve is opened, compressed air is allowed to enter together from water cooler outlet pipe and cooling water
Water cooler cleans water cooler jointly by gas-liquid two-phase；
(3) restore setting：After cleaning 15min, compressed air valve is closed, until discharge outlet is discharged without gas, closes backwash
Outlet valve opens water supply valve.
The water cooler is bushing type or shell and tube.
The aerating is cleaned, and the air pressure after compressed air valve is 0.12-0.2MPa.
The compressed air is continous way or pulsed.
The pulsed, frequency range is in 3-10Hz.
Compared with prior art, the technique effect of the invention is embodied in：
The present invention installs compressed air hose before outlet valve, using the continous way compressed air or certain pressure of certain pressure
And the compressed air of the pulsed of frequency, " surge " effect is generated inside water cooler with the cooling water of reflux, backwashes dirt,
The efficiency of water cooler on-line cleaning is substantially increased, dirt cleaning rate can reach more than 90%, while control the pressure of compressed air
Power prevents compressed air from being entered in coal gas through tubulation crackle that may be present, has ensured the safety of on-line cleaning, reduces clear
The risk and cost of wash water cooler.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
1- water inlet pipes, 2- inlet valves, 3- backwash outlets pipes, 4- backwash outlet valves, 5- discharge outlet,
6- water coolers, 7- compressed air hoses, 8- compressed air valves, 9- pressure gauges, 10- outlet valves,
11- outlet pipes.
Specific embodiment
It is limited with reference to specific embodiment technical scheme of the present invention is further, but claimed
Range is not only limited to made description.
In certain embodiments, a kind of on-line cleaning method of coal gas water cooler, which is characterized in that include the following steps：
(1) cleaning pre-sets：Water supply valve is closed, opens backwash outlet valve, cooling water flows back to water cooler；
(2) aerating is cleaned：Compressed air valve is opened, compressed air is allowed to enter together from water cooler outlet pipe and cooling water
Water cooler cleans water cooler jointly by gas-liquid two-phase；
(3) restore setting：After cleaning 15min, compressed air valve is closed, until discharge outlet is discharged without gas, closes backwash
Outlet valve opens water supply valve.
In certain embodiments, water cooler is bushing type.
In certain embodiments, water cooler is shell and tube.
In certain embodiments, aerating is cleaned, and the air pressure after compressed air valve is 0.12-0.2MPa, prevents sky
Has channeling enters in the heat exchanging pipe of damage, sets off an explosion.
In certain embodiments, compressed air is continous way.
In certain embodiments, compressed air is pulsed, frequency range 3-10Hz.
Embodiment 1
A kind of on-line cleaning method of coal gas water cooler, which is characterized in that include the following steps：
(1) cleaning pre-sets：Water supply valve is closed, opens backwash outlet valve, cooling water flows back to water cooler；
(2) aerating is cleaned：Compressed air valve is opened, downstream pressure control allows continous way compressed air from water in 0.12MPa
Cooler outlet pipe and reflux cooling water enter shell and tube water cooler together, and water cooler is cleaned jointly by gas-liquid two-phase；
(3) restore setting：After cleaning 15min, compressed air valve is closed, until discharge outlet is discharged without gas, closes backwash
Outlet valve opens water supply valve.
Embodiment 2
A kind of on-line cleaning method of coal gas water cooler, which is characterized in that include the following steps：
(1) cleaning pre-sets：Water supply valve is closed, opens backwash outlet valve, cooling water flows back to water cooler；
(2) aerating is cleaned：Open compressed air valve, downstream pressure control in 0.15MPa, allow impulsive compressional air with
The frequency of 3Hz, it is jointly clear by gas-liquid two-phase from water cooler outlet pipe and the cooling water sleeve pipe formula water cooler together that flows back
Wash water cooler；
(3) restore setting：After cleaning 15min, compressed air valve is closed, until discharge outlet is discharged without gas, closes backwash
Outlet valve opens water supply valve.
Embodiment 3
A kind of on-line cleaning method of coal gas water cooler, which is characterized in that include the following steps：
(1) cleaning pre-sets：Water supply valve is closed, opens backwash outlet valve, cooling water flows back to water cooler；
(2) aerating is cleaned：Open compressed air valve, downstream pressure control in 0.17MPa, allow impulsive compressional air with
The frequency of 7Hz enters shell and tube water cooler together from water cooler outlet pipe and reflux cooling water, jointly clear by gas-liquid two-phase
Wash water cooler；
(3) restore setting：After cleaning 15min, compressed air valve is closed, until discharge outlet is discharged without gas, closes backwash
Outlet valve opens water supply valve；
Embodiment 4
A kind of on-line cleaning method of coal gas water cooler, which is characterized in that include the following steps：
(1) cleaning pre-sets：Water supply valve is closed, opens backwash outlet valve, cooling water flows back to water cooler；
(2) aerating is cleaned：Open compressed air valve, downstream pressure control in 0.20MPa, allow impulsive compressional air with
From water cooler outlet pipe and the cooling water sleeve pipe formula water cooler together that flows back, water cooling is cleaned by gas-liquid two-phase jointly by 10Hz
Device；
(3) restore setting：After cleaning 15min, compressed air valve is closed, until discharge outlet is discharged without gas, closes backwash
Outlet valve opens water supply valve；
Embodiment 5
A kind of on-line cleaning method of coal gas water cooler, which is characterized in that include the following steps：
(1) setting cleaning：Water supply valve is closed, opens backwash outlet valve, cooling water flows back to water cooler；
(2) restore setting：After cleaning 15min, backwash outlet valve is closed, opens water supply valve；
Test example
Water cooler is cleaned using the method for embodiment 1-5, the cooling water after cleaning is filtered, dry, obtains dirt
Dirty powder a is weighed；Water cooler, manual cleaning are removed again, and the dirt of cleaning obtains dirt powder b, weigh through drying.Cleaning knot
Fruit is shown in Table 1：
Table 1
As can be seen from the above table, water cooler is cleared up using gas-liquid two-phase, the effect of cleaning water cooler, dirt cleaning can be improved
Rate can reach more than 90%.
Claims (5)
1. a kind of on-line cleaning method of coal gas water cooler, which is characterized in that include the following steps：
(1) cleaning pre-sets：Water supply valve is closed, opens backwash outlet valve, cooling water flows back to water cooler；
(2) aerating is cleaned：Compressed air valve is opened, compressed air is allowed to enter water cooling together from water cooler outlet pipe and cooling water
Device cleans water cooler jointly by gas-liquid two-phase；
(3) restore setting：After cleaning 15min, compressed air valve is closed, until discharge outlet is discharged without gas, closes backwash outlets
Valve opens water supply valve.
2. the on-line cleaning method of coal gas water cooler as described in claim 1, which is characterized in that the water cooler is casing
Formula or shell and tube.
3. the on-line cleaning method of coal gas water cooler as described in claim 1, which is characterized in that the aerating cleaning,
Air pressure after compressed air valve is 0.12-0.2MPa.
4. the on-line cleaning method of coal gas water cooler as described in claim 1, which is characterized in that the compressed air is connects
Continuous formula or pulsed.
5. the on-line cleaning method of coal gas water cooler as claimed in claim 4, which is characterized in that the pulsed, frequency
Ranging from 3-10Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711472002.0A CN108212958A (en) | 2017-12-29 | 2017-12-29 | A kind of on-line cleaning method of coal gas water cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711472002.0A CN108212958A (en) | 2017-12-29 | 2017-12-29 | A kind of on-line cleaning method of coal gas water cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108212958A true CN108212958A (en) | 2018-06-29 |
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ID=62646025
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711472002.0A Pending CN108212958A (en) | 2017-12-29 | 2017-12-29 | A kind of on-line cleaning method of coal gas water cooler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759394A (en) * | 2018-11-26 | 2019-05-17 | 中冶天工集团有限公司 | A kind of compact multifunction oil flushing equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201740457U (en) * | 2010-06-25 | 2011-02-09 | 鞍钢股份有限公司 | Gas back-blowing cleaning device for corrugated plate type heat exchanger |
| CN103499233A (en) * | 2013-10-18 | 2014-01-08 | 七台河宝泰隆甲醇有限公司 | Water cooler on-line backwashing method |
| CN204154177U (en) * | 2014-10-11 | 2015-02-11 | 山西晋丰煤化工有限责任公司 | Water cooler recoil flusher |
| CN104864770A (en) * | 2015-05-27 | 2015-08-26 | 武汉工程大学 | Online cleaning system and method for circulating cooling water heat exchanger |
| CN205580291U (en) * | 2016-05-04 | 2016-09-14 | 大唐韩城第二发电有限责任公司 | Plate heat exchanger from belt cleaning device |
| CN205679121U (en) * | 2016-06-20 | 2016-11-09 | 湖北三宁化工股份有限公司 | A kind of water cooler thermal washing energy-saving descaling device |
-
2017
- 2017-12-29 CN CN201711472002.0A patent/CN108212958A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201740457U (en) * | 2010-06-25 | 2011-02-09 | 鞍钢股份有限公司 | Gas back-blowing cleaning device for corrugated plate type heat exchanger |
| CN103499233A (en) * | 2013-10-18 | 2014-01-08 | 七台河宝泰隆甲醇有限公司 | Water cooler on-line backwashing method |
| CN204154177U (en) * | 2014-10-11 | 2015-02-11 | 山西晋丰煤化工有限责任公司 | Water cooler recoil flusher |
| CN104864770A (en) * | 2015-05-27 | 2015-08-26 | 武汉工程大学 | Online cleaning system and method for circulating cooling water heat exchanger |
| CN205580291U (en) * | 2016-05-04 | 2016-09-14 | 大唐韩城第二发电有限责任公司 | Plate heat exchanger from belt cleaning device |
| CN205679121U (en) * | 2016-06-20 | 2016-11-09 | 湖北三宁化工股份有限公司 | A kind of water cooler thermal washing energy-saving descaling device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759394A (en) * | 2018-11-26 | 2019-05-17 | 中冶天工集团有限公司 | A kind of compact multifunction oil flushing equipment |
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Application publication date: 20180629 |