CN104949571A - Method and device for zero-release online accurate chemical cleaning of tubular heat exchanger - Google Patents
Method and device for zero-release online accurate chemical cleaning of tubular heat exchanger Download PDFInfo
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- CN104949571A CN104949571A CN201510336416.5A CN201510336416A CN104949571A CN 104949571 A CN104949571 A CN 104949571A CN 201510336416 A CN201510336416 A CN 201510336416A CN 104949571 A CN104949571 A CN 104949571A
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Abstract
The invention discloses a method and device for zero-release online accurate chemical cleaning of a tubular heat exchanger. The method comprises the steps of injecting cleaning fluid in a heat exchange tube, pumping out residual cleaning fluid in the heat exchange tube after the cleaning fluid is soaked in the heat exchange tube for a preset time, pumping out and recycling all the residual cleaning fluid from the heat exchange tube, and recycling the residual cleaning fluid after treatment. The device comprises a locating device and a liquid distribution tank. A scale removing injection nozzle is arranged on the locating device, the liquid distribution tank is connected with a liquid injection valve through a liquid injection pump, and the liquid injection valve is connected with the scale removing injection nozzle. A liquid returning tank is connected with a filter, the filter is connected with the liquid injection valve through a liquid returning valve, the lower portion of the liquid returning tank is connected with the upper portion of the liquid distribution tank through a liquid distribution pump, and two PH testers are installed on the liquid distribution tank and the liquid returning tank respectively. The residual chemical fluid having finished soak cleaning is recycled to the liquid returning tank, the direct pollution caused by the discharge of the residual chemical fluid to a circulating cooling water system is avoided, zero emission is achieved; the residual fluid in the liquid returning tank can be used once again after concentrated treatment, and the cleaning cost is greatly reduced.
Description
Technical field
The invention belongs to industrial heat exchanger Chemical cleaning field, be specifically related to a kind of online precise chemical structure cleaning method and device of tubular heat exchanger zero-emission.
Background technology
Shell and tube water cooler is widely used in one of industrial department main auxiliary equipments such as power, chemical industry, oil and atomic energy, be responsible for various power, electrically, machinery and the important cooling task of chemical reaction equipment, the quality of its service behaviour has important impact to the safety of enterprise, economical operation.In diabatic process, in shell and tube water cooler, heat exchanger tube water side inwall is owing to easily forming incrustation scale and spot by the impact of heating and water quality, the performance of heat exchanger exerts an adverse impact, and how remove incrustation scale and spot is in time a major issue urgently to be resolved hurrily always.For power plant: condenser is exactly a kind of shell and tube water cooler: be made up of thousands of heat exchanger tubes, steam is walked outside pipe, cooling water is walked in pipe, because there being the existence of heat exchange, the salt in cooling water is constantly separated out in laser heating process, forms a large amount of incrustation scales and is attached on tube wall, vacuum in condenser is caused to decline, gross coal consumption rate rises, and cost of electricity-generating increases, and therefore reduces the efficiency of Turbo-generator Set.As condenser fouling about 0.5mm, vacuum can be made to drop to less than 85% by more than 90%, gross coal consumption rate is made to raise 15 ~ 20g/kWh, for the 300MW unit that a year running 7000h, rate of load condensate are 90 %, standard coal about 28 ~ 380,000 t will be consumed every year more, if scale forming reaches 1mm, then not only many coal consumptions will exceed annual more than 50,000 tons, and will affect 10% exert oneself.In condenser, vacuum declines, and the exhaust temperature of steam turbine also can be made to raise, cause the distortion of low pressure (LP) cylinder, not only affects the economy that power plant runs, and also directly affects the security of operation of Turbo-generator Set.The present invention proposes for this problem, with minute quantity targetedly, specific chemical, online chemistry accurately a kind of technical method of cleaning is realized to incrustation scale in shell and tube water cooler and spot.
Below, for plant condenser, the method for similar on-line cleaning the present invention and power plant commonly used is carried out one and is compared:
1) condenser ball cleaning method (this method is power plant's standard configuration): then drop into a large amount of glueballs at condenser water, glueballs flows with recirculated water, pass through heat exchange tube of condenser, exchange heat pipe cleans, although it can play the effect of certain scale removal, but due to glueballs can not too greatly, too hard otherwise be difficult to by heat exchange tube of condenser, but too little, too soft, can descale effect be affected again, cause the glueballs rate of recovery to reduce.In addition, rubber ball cleaning method also depends on the flow velocity of recirculated water, winter, circulating water temperature was low, flow can not be large, otherwise can hot-well depression be produced, cause unit operation economy to decline. the decline of flow causes the decline of water flow velocity in heat exchanger tube, and rubber ball cleaning effect declines, condenser clean rate declines, and minimumly reaches 0.4 (design load 0.85).Do the system of recirculated water for water in employing, effect is just poorer, therefore how to make good use of the difficult problem that glueballs is also puzzlement power plant always.A large amount of articles about glueballs improvement can be found at more than CNK and just demonstrate this point, but same problem there will be again after running a period of time after transformation, rubber ball cleaning inherently Existence dependency recirculated water flow velocity is described, ball collecting rate and cleaning performance are difficult to satisfactory to both parties significant deficiency.
2) condenser in-site chemical cleaning method: now power plant capital without exception adds a large amount of chemicals (mainly acid, corrosion inhibiter and algicide are that neutralization discharge also will add a large amount of alkali), to stop the growth of heat exchanger tube fouling and algae substantially on the basis of dropping into rubber ball cleaning in condenser circulating water pool.Along with unit capacity increases, the circulating cooling water yield is increasing, 300MW unit is about 40000t/h, cooling tower circulating cooling evaporated quantity of water is about 2600t/h, 600MW, 1000MW unit is just more, in order to ensure scale inhibition, sterilization effect, maintain the low pH value of recirculated cooling water, chemical feeding quantity is well imagined, for 300MW unit, the expense of dosing in a year is about about 2,000,000 yuan.However, to employing in water (country have regulation electric power plant circulating water to adopt in water, to avoid adopting underground water) as the unit of circulating cooling water of power plant, effect is also not obvious, many units because of fouling seriously have to run duration carry out facing stop cleaning, to ensure the security of unit operation.
The subject matter of this cleaning method is: the chemical added, and is recycled recirculated water a large amount of in pond and dilutes, do not reach cleaning concentration far away to during heat exchange tube of condenser, has wasted a large amount of chemical.
Summary of the invention
Deficiency according to prior art exists: the present invention proposes that a kind of cleaning agent consumption is few, features high scale-removing effect, the industrial shell and tube water cooler online precise chemical structure snaking technology of zero-emission can be realized.
Technical solution of the present invention realizes by the following method:
An online precise chemical structure cleaning method for tubular heat exchanger zero-emission, the method comprises the steps:
Be injected into by cleaning fluid in heat exchanger tube, after cleaning fluid soaks the scheduled time in heat exchanger tube, extracted out by the cleaning raffinate in described heat exchanger tube, described cleaning raffinate can all be extracted out and reclaim from heat exchanger tube, recycles after treatment.
Described cleaning raffinate is extracted out and is reclaimed after filtering from heat exchanger tube.
Cleaning raffinate after recovery, after testing after pH value, is re-introduced in heat exchanger tube after adding corresponding reagent.
Described reagent is acid reagent.
A kind of device of online precise chemical structure cleaning method of described tubular heat exchanger zero-emission, comprise positioner and Agitation Tank, described positioner is provided with snaking note mouth, described Agitation Tank connects liquid-filling valve by topping-up pump, described liquid-filling valve connects snaking note mouth, this device also comprises back liquid and fills with, described time flow container connects filter, described filter passes through back liquid valve and connects liquid-filling valve, described time flow container is connected to the top of Agitation Tank by dosing pump by bottom, described Agitation Tank and time flow container are respectively equipped with a PH tester.
This device also comprises back liquid pump, and described time liquid pump is connected in parallel with described time liquid valve.
Described Agitation Tank and time flow container are respectively equipped with a liquid level meter.
A blowoff valve is respectively equipped with in the bottom of described Agitation Tank and time flow container.
Described Agitation Tank is provided with agitator.
Beneficial effect of the present invention is:
1, the calcium in recirculated water, magnesium ion, incrustation scale is formed because heat exchange precipitate into tube wall, the chemical cleaning solution reaction of incrustation scale and injection generates the raffinate of calcium salt and magnesium salts, raffinate is recycled to back flow container, this process completes the desalination work of recirculated water, effectively improve circulating water quality, reduce sewer, considerably reduce rate of water make-up;
2, the chemical raffinate completing soaking and washing is recycled to back flow container, avoids the direct pollution entering recirculating cooling water system and cause, achieves zero-emission;
3, return the raffinate in flow container, through focusing on and can carrying out secondary use, considerably reduce cleaning cost;
4, the present invention can remove the dirt of heat exchanger tube in time thoroughly, provides new approach, have great water saving potential for recirculated water high concentration ratio runs.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention schematic diagram;
1-positioner, 2-snaking note mouth, 3-Agitation Tank, 4-topping-up pump, 5-return flow container, 6-filter, 7-return liquid valve, 8-dosing pump, 9-PH tester, 10-return liquid pump, 11-liquid level meter, 12-blowoff valve, 13-agitator, 14-liquid-filling valve, 15-condenser, 16-heat exchanger tube, 17-dosing valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, by specific embodiment, technical solution of the present invention is described further.
As shown in Figure 1, a kind of online accurately cleaning device of tubular heat exchanger zero-emission, this device comprises Agitation Tank 3, Agitation Tank 3 is provided with for the agitator 13 of stirring and washing liquid with for observing the liquid level meter 11 of water level inside, PH tester 9 for detecting cleaning fluid acid-base value is also installed, the bottom of Agitation Tank 3 connects topping-up pump 4, topping-up pump 4 connects liquid-filling valve 14, cleaning fluid in Agitation Tank 3 is injected in heat exchanger tube 16 by the snaking note mouth 2 on the positioner 1 in condenser 15 by topping-up pump 4, cooling water in heat exchanger tube 16 is driven away by cleaning fluid, after cleaning fluid fills heat exchanger tube 16, snaking note mouth 2 is by heat exchanger tube 16 port closed, cooling water is avoided to enter and the leaking outside of cleaning fluid, according to the degree of dirt in heat exchanger tube 16, in heat exchanger tube 16, different soak times is set to cleaning fluid, dirt is serious, can soak time longer, after the cleaning and dipping time reaching setting, open back liquid valve 7, rely on the pressure of condenser 15 inside, cleaning raffinate after immersion in heat exchanger tube 16 all can be entered into filter 6 by time liquid valve 7 to filter, enter into back in flow container 5 after large the material such as silt are wherein filtered out, now, cooling water enters into again by cleaned heat exchanger tube 16.Return cleaning raffinate in flow container 5 after the detection of PH tester 9, open dosing valve 17 after reaching initial wash liquid pH value after adding corresponding reagent, then be injected in Agitation Tank 3 by dosing pump 8 by cleaning fluid, initial wash liquid is acidic cleaning solution.If the insufficient pressure in condenser 15, now, closing back liquid valve 7, open back liquid pump 10, raffinate extraction will be cleaned by returning liquid pump 10.Agitation Tank 3 and return bottom flow container 5 and be provided with blowoff valve 12, can be regular to Agitation Tank 3 and return flow container 5 blowdown and cleaning.
Multiple or many groups heat exchanger tube can be carried out by the method to clean.
Principle of the present invention is for adopting equation plug flow principle, and namely when fluid is liquid, other end opening, injection end is closed, and fluid can not flow out from openend.Utilize this principle, cleaning fluid can not flow out at heat exchanger tube 16, and cleaning raffinate can all be extracted out from heat exchanger tube 16.
Claims (9)
1. an online precise chemical structure cleaning method for tubular heat exchanger zero-emission, the method comprises the steps:
Cleaning fluid is injected in heat exchanger tube, after cleaning fluid soaks the scheduled time in heat exchanger tube, the cleaning raffinate in described heat exchanger tube is extracted out, it is characterized in that: described cleaning raffinate can all be extracted out and reclaim from heat exchanger tube, recycles after treatment.
2. the online precise chemical structure cleaning method of a kind of tubular heat exchanger zero-emission according to claim 1, is characterized in that: described cleaning raffinate is extracted out and reclaimed after filtering from heat exchanger tube.
3. the online precise chemical structure cleaning method of a kind of tubular heat exchanger zero-emission according to claim 1 or 2, is characterized in that: the cleaning raffinate after recovery, after testing after pH value, is re-introduced in heat exchanger tube after adding corresponding reagent.
4. the online precise chemical structure cleaning method of a kind of tubular heat exchanger zero-emission according to claim 3, is characterized in that: described reagent is acid reagent.
5. one kind for realizing the device of the online precise chemical structure cleaning method of tubular heat exchanger zero-emission described in claim 1, comprise positioner (1) and Agitation Tank (3), described positioner (1) is provided with snaking note mouth (2), described Agitation Tank (3) connects liquid-filling valve (14) by topping-up pump (4), described liquid-filling valve (14) connects snaking note mouth (2), it is characterized in that: this device also comprises back flow container (5), described time flow container (5) connects filter (6), described filter (6) passes through back liquid valve (7) and connects liquid-filling valve (14), described time flow container (5) is connected to the top of Agitation Tank (3) by dosing pump (8) by bottom, described Agitation Tank (3) and time flow container (5) are respectively equipped with a PH tester (9).
6. a kind of device according to claim 5, it is characterized in that: this device also comprises back liquid pump (10), described time liquid pump (10) is connected in parallel with described time liquid valve (7).
7. a kind of device according to claim 5 or 6, is characterized in that: described Agitation Tank (3) and time flow container (5) are respectively equipped with a liquid level meter (11).
8. a kind of device according to claim 5 or 6, is characterized in that: a blowoff valve (12) is respectively equipped with in the bottom of described Agitation Tank (3) and time flow container (5).
9. a kind of device according to claim 5, is characterized in that: described Agitation Tank (3) is provided with agitator (13).
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| CN201510336416.5A CN104949571B (en) | 2015-06-17 | 2015-06-17 | The online precise chemical structure cleaning method and device of a kind of tubular heat exchanger zero-emission |
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| CN201510336416.5A CN104949571B (en) | 2015-06-17 | 2015-06-17 | The online precise chemical structure cleaning method and device of a kind of tubular heat exchanger zero-emission |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560493A (en) * | 2017-10-23 | 2018-01-09 | 济南大学 | A kind of vacuum salt production vapo(u)rization system cleaning and descaling method |
| CN109237991A (en) * | 2018-09-17 | 2019-01-18 | 中国矿业大学 | A kind of circulating plant condenser in-site chemical cleaning method and system |
| CN109269344A (en) * | 2018-09-17 | 2019-01-25 | 中国矿业大学 | A kind of in-site chemical cleaning liquid mixing system |
| CN109827462A (en) * | 2019-04-12 | 2019-05-31 | 秦皇岛华电测控设备有限公司 | A kind of cleaning device and its cleaning process of heat exchange equipment |
| CN111102875A (en) * | 2019-12-05 | 2020-05-05 | 山西太钢不锈钢股份有限公司 | Cleaning formula and cleaning method for air cooler |
Citations (8)
| 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 |
| CN203007425U (en) * | 2012-12-19 | 2013-06-19 | 北京志能祥赢节能环保科技有限公司 | Device for cleaning and pre-coating cooling wall of blast furnace |
| CN103743864A (en) * | 2013-12-21 | 2014-04-23 | 芜湖通和汽车管路***有限公司 | Inspection device and method for cleanliness in automobile pipeline |
| CN103808625A (en) * | 2014-02-28 | 2014-05-21 | 宁波德业科技集团有限公司 | Heat exchanger cleanliness detection method |
| CN103851953A (en) * | 2014-03-28 | 2014-06-11 | 株洲开元工业设备清洗有限公司 | Independent mini-flow circulation type chemical descaling method of tubular heat exchanger |
| CN104233329A (en) * | 2014-09-15 | 2014-12-24 | 河北省科学院能源研究所 | Chemical cleaning method of heat exchanger |
| CN104596350A (en) * | 2015-01-09 | 2015-05-06 | 彭伟 | Online rapid pickling device and method for condenser in power plant |
| CN104694937A (en) * | 2015-03-08 | 2015-06-10 | 衢州学院 | Heat exchanger electrochemically-induced film formation method in circulating cooling water micro-alkalifying transition period |
-
2015
- 2015-06-17 CN CN201510336416.5A patent/CN104949571B/en active Active
Patent Citations (8)
| 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 |
| CN203007425U (en) * | 2012-12-19 | 2013-06-19 | 北京志能祥赢节能环保科技有限公司 | Device for cleaning and pre-coating cooling wall of blast furnace |
| CN103743864A (en) * | 2013-12-21 | 2014-04-23 | 芜湖通和汽车管路***有限公司 | Inspection device and method for cleanliness in automobile pipeline |
| CN103808625A (en) * | 2014-02-28 | 2014-05-21 | 宁波德业科技集团有限公司 | Heat exchanger cleanliness detection method |
| CN103851953A (en) * | 2014-03-28 | 2014-06-11 | 株洲开元工业设备清洗有限公司 | Independent mini-flow circulation type chemical descaling method of tubular heat exchanger |
| CN104233329A (en) * | 2014-09-15 | 2014-12-24 | 河北省科学院能源研究所 | Chemical cleaning method of heat exchanger |
| CN104596350A (en) * | 2015-01-09 | 2015-05-06 | 彭伟 | Online rapid pickling device and method for condenser in power plant |
| CN104694937A (en) * | 2015-03-08 | 2015-06-10 | 衢州学院 | Heat exchanger electrochemically-induced film formation method in circulating cooling water micro-alkalifying transition period |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560493A (en) * | 2017-10-23 | 2018-01-09 | 济南大学 | A kind of vacuum salt production vapo(u)rization system cleaning and descaling method |
| CN109237991A (en) * | 2018-09-17 | 2019-01-18 | 中国矿业大学 | A kind of circulating plant condenser in-site chemical cleaning method and system |
| CN109269344A (en) * | 2018-09-17 | 2019-01-25 | 中国矿业大学 | A kind of in-site chemical cleaning liquid mixing system |
| CN109827462A (en) * | 2019-04-12 | 2019-05-31 | 秦皇岛华电测控设备有限公司 | A kind of cleaning device and its cleaning process of heat exchange equipment |
| CN109827462B (en) * | 2019-04-12 | 2023-07-04 | 秦皇岛华电测控设备有限公司 | Cleaning device and cleaning process of heat exchange equipment |
| CN111102875A (en) * | 2019-12-05 | 2020-05-05 | 山西太钢不锈钢股份有限公司 | Cleaning formula and cleaning method for air cooler |
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