CN103063082A - Cleaning and anti-scaling process without shut-down of gas-gas heater (GGH) and device thereof - Google Patents
Cleaning and anti-scaling process without shut-down of gas-gas heater (GGH) and device thereof Download PDFInfo
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- CN103063082A CN103063082A CN2012105937844A CN201210593784A CN103063082A CN 103063082 A CN103063082 A CN 103063082A CN 2012105937844 A CN2012105937844 A CN 2012105937844A CN 201210593784 A CN201210593784 A CN 201210593784A CN 103063082 A CN103063082 A CN 103063082A
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Abstract
The invention discloses a cleaning and anti-scaling process without shut-down of a gas-gas heater (GGH). A GGH system is provided with an on-line cleaning device and a high-pressure flusher, the on-line cleaning device comprises a medicating device and a medicine spraying device, the output end of the medicating device is connected with the medicine spraying device, and the high-pressure flusher comprises a high-pressure water outlet and a high-pressure water spraying device connected through a high-pressure water pipe. The process includes: the surface of a heating element is guaranteed to be moist, medication frequency is controlled, medicine pre-filling quantity and medicine spraying quantity are calculated, medicine enters to be sprayed for 5-30 minutes according to calculation quantity, an interval is 5-30 minutes after medicine spraying is finished, the medicine spraying device is used for supplementing water, water supplement is performed for 1-5 times continuously, the high-pressure washer is started, washing is performed for 30-60 minutes, the water supplement quantity is 0.01-0.5 time of the total quantity of medicine, and the medication frequency is controlled in 5-20 days.
Description
Technical field
The present invention relates to clean the scale inhibition field, the concrete flue gas heat exchanger in the Technical Introduction of Desulfurized (hereinafter to be referred as GGH) that relates to implements to clean employed device in the technique of scale inhibition and this technique thereof in the situation of not stopping transport.
Background technology
GGH is along with the operation of desulphurization system, and dust stratification, fouling in various degree often can appear in the GGH heat-transfer surface, and serious meeting results in blockage, and affects the normal safe operation of desulphurization system.Particularly environmental protection is to the mandatory requirement of desulphurization system cancellation bypass, and GGH ruuning situation will be directly connected to the safe handling of desulphurization system and main frame.The desulphurization system of GGH is installed, and fouling is almost inevitable, therefore, GGH is cleaned, and also just becomes the service work that the owner must face.Traditional solution is to shut down to carry out mechanical jet flow cleaning or the rear Chemical cleaning of dismounting, therefore cleans just to mean shutdown, and this has increased power plant's non-programmed halt examination pressure, has also reduced power plant's generating income.
Summary of the invention
For the deficiency that prior art exists, one of purpose of the present invention provides under the GGH normal operation, need not to stop transport to clean the technique of scale inhibition; Two of purpose of the present invention provides the required cleaning device of this technique.
For achieving the above object, the present invention adopts following technical scheme to realize:
GGH does not stop transport and cleans scale inhibition technique, be: be provided with the high-pressure flushing device that on-line cleaning device and GGH system carry in the GGH system, described on-line cleaning device comprises: chemicals dosing plant and medicament spray equipment, and the output of described chemicals dosing plant is connected with the medicament spray equipment;
Described high-pressure flushing device comprises water under high pressure outlet and the high pressure water spraying device that connects by high-pressure water pipeline;
Described technique is: guaranteeing in the moistening situation of heat exchange element surface maintenance, the control medicine frequency, calculate the pre-film amount of medicament and medicament spray flux, advance medicine spray 5 ~ 30min by amount of calculation, after medicament sprayed complete interval 5 ~ 30min, the moisturizing of with medicament spray equipment was continuously after the moisturizing 1 ~ 5 time, start high-pressure flushing device, flushing 30 ~ 60min;
Described rate of water make-up is 0.01 ~ 0.5 times of medicament total amount;
Described medicine frequency was controlled between 5 ~ 20 days.
The pre-film amount of described medicament, its computing formula is: M=S * δ * ρ * 10
-3* λ;
Wherein: described M is the pre-film amount of medicament, and unit is in Kg; δ is the medicament film thickness, and unit is in mm; S is the heat exchange element gross area, and unit is with m
2Meter; ρ is medicament density, and unit is with Kg/m
3Meter; λ is the medicament penalty coefficient.
Described medicament spray flux, its computing formula is:
Wherein: described Q is the medicament spray flux, and unit is with m
3/ h meter; M is the pre-film amount of medicament, and unit is in Kg; ρ is medicament density, and unit is with Kg/m
3Meter; T is transfusion time, and unit is in h.
Described chemicals dosing plant comprises medicament system and clean water system;
Described medicament system comprises dosing tank, filter and compound pump, the input of described dosing tank is connected by pesticide feeding duct with feeding opening, the output of dosing tank is connected by the arrival end of the first pipe-and-filter, the output of filter is connected with the input of compound pump by second pipe, and the medicament delivery side of pump is connected with the medicament spray equipment;
Be provided with the first control valve that enters filter for the medicament in the control dosing tank on described the first pipeline;
Described clean water system comprises the first clean water pipeline that is connected with the input of dosing tank, the other end of described the first clean water pipeline is connected with the second clean water pipeline, the input of described the second clean water pipeline is connected with the clean mouth of a river, and the output of described the second clean water pipeline is connected with the arrival end of filter.
Described medicament spray equipment comprises spray supervisor and fan nozzle;
Described spray supervisor length is near the radius of GGH;
Described fan nozzle, it sprays 45 °～120 ° of fan-shaped angles, and nozzle distance GGH upper surface height is 150 ~ 450mm, so that the liquid of nozzle ejection, its fan-shaped contact-making surface span is 600 ~ 800mm, and the adjacent nozzle ejection liquid range outside is overlapping, and its overlapping width is 50 ~ 100mm.
According to the mass percent meter: described medicament is by 20～40% organic carboxylate; 0.01～1% penetration enhancer JFC; 0.01～5% organic phosphonate; 0.01～1% NMF; Surplus is water.
Described machine carboxylate is preferred: at least a in the sodium salt of organic carboxyl acid or sylvite or the ammonium salt.
Described machine carboxylate is more preferably: at least a in Epoxysuccinic acid ammonium, sodium glycollate, potassium acetate or the glycolic acid potassium.
Described organic phosphonates is preferred: at least a in ATMP four potassium, HEDP potassium or the HEDP sodium.
Described NMF is preferred: a kind of in sodium lactate, potassium lactate or the urea.
The GGH run duration, its clean flue gas partial temperature is 45～100 ℃ of scopes, former flue gas partial temperature is 100～150 ℃ of scopes, under this hot environment, need medicament still to keep better heat endurance, make it to have an effect with dirt, and the poor heat stability of existing medicament, and need more than 10 minute reaction time, medicament provided by the invention is joined, can be in the operating mode of this complicated high temperature, and chemical reaction just occurs in 2 ~ 3 minutes even shorter time, fast reaction can be evaded the negative effect of operating mode complexity, and this also is to guarantee not stop transport the feasible decisive factor of cleaning scale inhibition.
GGH is in operation and carries out medicament and clean, and a large amount of high-temperature flue gas carries easily medicament and enters absorption tower or chimney, must cause certain medicament loss, so be necessary to consider to greatest extent, the high efficiency with medicament that makes.Per hour the former flue gas of the large flow GGH in all places up to a hundred flows to the absorption tower from bottom to up, gas approach temperature (GGH hot junction) is generally at 100 ~ 150 ℃, flue gas flow is large, flow from below to up, temperature is high, carry easily medicament along walking, if along airflow direction spray medicine, favourable medicament is distributed to each wave groove of GGH fast, but air-flow from bottom to top, and medicament is when the direction upward spraying, because the gravity fall of itself, form opposite resistance with air-flow, therefore affect the medicament service efficiency, the former flue gas of high temperature can accelerate the evaporation of medicament moisture simultaneously, even medicament decomposes unfavorable cleaning efficiency, benefit control.Therefore in the installation of the more favourable spray equipment of the clean fume side of GGH, at the GGH cold side spray equipment is installed, medicament flows from top to down along flue gas, medicament promotes to be distributed to fast easily each wave groove of GGH by pump pressure, gravitional force, air-flow, flue-gas temperature is low has slowed down medicament moisture evaporation rate greatly, better guarantees medicament validity, therefore in the technical scheme of the present invention, chemicals dosing plant is selected in clean fume side, GGH cold junction top.
GGH rotates along hour hands and rotates, and general rotating speed is not more than 3 and turns/min, and the cleaning dosing that is in operation is mainly considered: medicament stops at low-temperature space as far as possible, reduce medicament evaporation loss, so spray head should be installed in as far as possible near a minute gas line side, reserves sufficient space, and is easy to maintenance.About 20 ~ the 30cm of rotation highest level face of the whole rotating disk of general GGH heat exchange original paper upper surface distance, too high if spray head is installed, the medicament stroke increases, and evaporation loss increases thereupon, simultaneously expulsion pressure is required also to improve, and increases energy consumption.Thereby do not affecting in the normally rotation situation of GGH, it is highly proper that spray head is mounted on the single original paper upper surface 150 ~ 450mm of distance.
Spray head quantity and spray pressure, the definite needs of spray area designed separately in conjunction with concrete GGH, generally speaking, spray head is installed and is a word axle center radiation direction arrangement, according to stoppage in transit on-line cleaning practical experience, the excess pressure medicament splashes acutely, increase the medicament disengagement area, accelerate loss, spending low-pressure medicament moment, to wear the power of penetrating poor, and unfavorable medicament rapid osmotic is distributed to each corrugated plating inner surface, therefore fan nozzle in the technical scheme provided by the invention, spray fan-shaped angle 45 °～120 ° scopes, its fan-shaped contact-making surface span is 600 ~ 800mm, and the adjacent nozzle ejection liquid range outside is overlapping, and its overlapping width is 50 ~ 100mm.
Clean the beneficial effect that angle is considered technical solution of the present invention from reality:
Current, GGH that we contact cleans most of because serious scale is forced to stop cleaning, and wherein more shutdown is pulled down GGH unit bag and carried out chemical jet flow cleaning, is exactly one month or longer time easily, and direct economic loss is very large.Do not stop transport effective enforcement of on-line cleaning of GGH, the economic benefit that direct or indirect realization is considerable, aspect environmental protection, brought positive social effect simultaneously: one, directly avoided unnecessary and safeguarded the economic loss that is caused by forced-stopping machine; Its two, avoid high-pressure spray to the infringement of enamel, prolonged the service life of GGH, indirectly reduced user's maintenance and repair expense; Its three, more effective guarantee the heavy-duty service of equipment, reduce or avoided equipment operation risk, safety and stability production to guarantee equipment on-road efficiency maximization; Its four, aspect the environment environmental protection, more be well positioned to meet the environment flue gas and process related request, avoided operating with failure or shut down the unnecessary smoke pollution environment that causes and the economic penalties problem that causes.
Description of drawings
Fig. 1 is process chart of the present invention
Fig. 2 is the structural representation of spray equipment of the present invention
The specific embodiment
Below by specific embodiment, the present invention is done detailed description.
Embodiment 1
Certain 1000MW unit is provided with the high-pressure flushing device that on-line cleaning device and GGH system carry in the GGH system, described on-line cleaning device comprises: chemicals dosing plant and medicament spray equipment, and the output of described chemicals dosing plant is connected with the medicament spray equipment; Described high-pressure flushing device comprises water under high pressure outlet 11 and the high pressure water spraying device 13 that connects by high-pressure water pipeline 12;
Described technique is: guaranteeing in the moistening situation of heat exchange element surface maintenance, the control medicine frequency, calculate the pre-film amount of medicament and medicament spray flux, advance medicine spray 15min by amount of calculation, after medicament sprayed complete interval 15min, the moisturizing of with medicament spray equipment was continuously after the moisturizing 5 times, start high-pressure flushing device, flushing 60min; Described rate of water make-up is 0.5 times of medicament total amount; Described medicine frequency was controlled between 15 days.
The pre-film amount of described medicament, its computing formula is:
M=S×δ×ρ×10
-3×λ；
Wherein: described M is the pre-film amount of medicament, and unit is in Kg; δ is the medicament film thickness, and unit is in mm; S is the heat exchange element gross area, and unit is with m
2Meter; ρ is medicament density, and unit is with Kg/m
3Meter; λ is the medicament penalty coefficient.
M=31000 * 0.05 * 1.2 * 1.15=2.139 ton
Described medicament spray flux, its computing formula is:
Wherein: described Q is the medicament spray flux, and unit is with m
3/ h meter; M is the pre-film amount of medicament, and unit is in Kg; ρ is medicament density, and unit is with Kg/m
3Meter; T is transfusion time, and unit is in h.
Q=2139/(1200×0.5)=3.57m
3/h
Described chemicals dosing plant comprises medicament system and clean water system;
Described medicament system comprises dosing tank 21, filter 22 and compound pump 23, the input of described dosing tank 21 is connected by pesticide feeding duct 25 with feeding opening 24, the output of dosing tank 21 is connected with the arrival end 221 of filter 22 by the first pipeline 251, the output of filter 22 is connected by the input of second pipe 252 with compound pump 23, and the output of compound pump 23 is connected with the medicament spray equipment; Be provided with the first control valve that enters filter 22 for the medicament in the control dosing tank 21 on described the first pipeline 251; Described clean water system comprises the first clean water pipeline 31 that is connected with the input of dosing tank 21, the other end of described the first clean water pipeline 31 is connected with the second clean water pipeline 32, the input of described the second clean water pipeline is connected with the clean mouth of a river, and the output of described the second clean water pipeline 32 is connected with the arrival end 221 of filter 22.
Described medicament spray equipment comprises spray supervisor 41 and fan nozzle 42; Described spray is responsible for 41 length near the radius of GGH; Described fan nozzle 42,90 ° of its spray segment angles, nozzle distance GGH upper surface height is 400mm, and so that the liquid of nozzle ejection, its fan-shaped contact-making surface span is 800mm, and the adjacent nozzle ejection liquid range outside is overlapping, and its overlapping width is 100mm.
According to the mass percent meter: described medicament is by 30% sodium glycollate; 0.01% penetration enhancer JFC; 0.01% ATMP four potassium; 0.01% sodium lactate; Surplus is water.
Embodiment 2
Certain 300MW unit is provided with the high-pressure flushing device that on-line cleaning device and GGH system carry in the GGH system, described on-line cleaning device comprises: chemicals dosing plant and medicament spray equipment, and the output of described chemicals dosing plant is connected with the medicament spray equipment; Described high-pressure flushing device comprises water under high pressure outlet 11 and the high pressure water spraying device 13 that connects by high-pressure water pipeline 12;
Described technique is: guaranteeing in the moistening situation of heat exchange element surface maintenance, the control medicine frequency, calculate the pre-film amount of medicament and medicament spray flux, advance medicine spray 15min by amount of calculation, after medicament sprayed complete interval 15min, the moisturizing of with medicament spray equipment was continuously after the moisturizing 5 times, start high-pressure flushing device, flushing 60min; Described rate of water make-up is 0.1 times of medicament total amount; Described medicine frequency was controlled between 12 days.
The pre-film amount of described medicament, its computing formula is:
M=S×δ×ρ×10
-3×λ；
Wherein: described M is the pre-film amount of medicament, and unit is in Kg; δ is the medicament film thickness, and unit is in mm; S is the heat exchange element gross area, and unit is in m2; ρ is medicament density, and unit is with Kg/m
3Meter; λ is the medicament penalty coefficient.
M=22387 * 0.05 * 1.2 * 1.15=1545 ton
Described medicament spray flux, its computing formula is:
Wherein: described Q is the medicament spray flux, and unit is with m
3/ h meter; M is the pre-film amount of medicament, and unit is in Kg; ρ is medicament density, and unit is with Kg/m
3Meter; T is transfusion time, and unit is in h.
Q=1545/(1200×0.5)=2.57m
3/h
Described chemicals dosing plant comprises medicament system and clean water system;
Described medicament system comprises dosing tank 21, filter 22 and compound pump 23, the input of described dosing tank 21 is connected by pesticide feeding duct 25 with feeding opening 24, the output of dosing tank 21 is connected with the arrival end 221 of filter 22 by the first pipeline 251, the output of filter 22 is connected by the input of second pipe 252 with compound pump 23, and the output of compound pump 23 is connected with the medicament spray equipment; Be provided with the first control valve that enters filter 22 for the medicament in the control dosing tank 21 on described the first pipeline 251; Described clean water system comprises the first clean water pipeline 31 that is connected with the input of dosing tank 21, the other end of described the first clean water pipeline 31 is connected with the second clean water pipeline 32, the input of described the second clean water pipeline is connected with the clean mouth of a river, and the output of described the second clean water pipeline 32 is connected with the arrival end 221 of filter 22.
Described medicament spray equipment comprises spray supervisor 41 and fan nozzle 42; Described spray is responsible for 41 length near the radius of GGH; Described fan nozzle 42,80 ° of its spray segment angles, nozzle distance GGH upper surface height is 450mm, and so that the liquid of nozzle ejection, its fan-shaped contact-making surface span is 750mm, and the adjacent nozzle ejection liquid range outside is overlapping, and its overlapping width is 80mm.
According to the mass percent meter: described medicament is by 40% hydroxy acid sodium; 0.01% penetration enhancer JFC; 0.02% ATMP four potassium; 0.02% potassium lactate; Surplus is water.
Among the embodiment 1; certain 1000MW of power plant unit GGH scale inhibition cleaning operation 6 months by a definite date of not stopping transport, unit still keeps normal running status, before not using this device technique; every three months pressure reduction can increase to 1700Pa by first fortune 600Pa, causes shutting down maintenance and cleans.
The emergent cleaning of this compressor emergency shutdown needs 7-10 days, and relatively thoroughly cleaning needs 25-30 days, presses annual 4 the conservative budgets of cleaning, and stops transport 7 days at every turn, and each cleaning charge is with 150,000 yuan, and annual cleaning charge drops at least: ten thousand yuan of 4 * 15=60; The each shutdown 7 days, annual 4 times, 100MW unit generation amount 1,000,000 degree electricity/h, every day, 24h counted, generated energy loss: 7 * 4 * 24 * 100,=67,200 ten thousand degree electricity.Thermoelectricity operating cost is about 0.15-0.25 unit/kilowatt hour according to incompletely statistics; amount at least 10,080 ten thousand yuan of RMB; therefore it is quite large that the generated energy that causes because of shutdown reduces loss in revenue; the more important thing is that stop cleaning is a kind of passive treatment measures, can only alleviate, can not thoroughly separate problem; inevitable or the continuously oepration at full load of unit; also have simultaneously non-programmed halt examination risk, therefore, indirect economic loss can not be estimated.
The scale inhibition cleaning of not stopping transport is online implemented economic cost: sprayed once medication 2.5-3 ton, annual about 30 spray medicaments, about 1,500,000 yuan of full year cost in the every 10-12 of medicament days.
By comparative analysis, after this new technology puts into operation, avoided the direct generation of electricity loss that in the past caused by the forced-stopping machine maintenance, reduce simultaneously or solved the equipment operation risk, saved the stop cleaning cost of overhaul.The economic benefit social benefit is remarkable.
Among the embodiment 2, certain 300MW of power plant unit GGH scale inhibition cleaning operation 6 months by a definite date of not stopping transport, unit is normally operation still.This unit design pressure reduction 660Pa before not using this device technique, must shut down maintenance when each pressure reduction reaches 2200Pa and clean, and be forced to stop cleaning 5-7 time every year at least.
The emergent cleaning of this compressor emergency shutdown needs 5-8 days, and relatively thoroughly cleaning needs 20-25 days, presses annual minimum 5 the conservative budgets of cleaning, and stops transport 5 days at every turn, and each cleaning charge is with 100,000 yuan, and annual cleaning charge drops at least: ten thousand yuan of 5 * 10=50; The each shutdown 5 days, annual 5 times, 30MW unit generation amount 300,000 degree electricity/h, every day, 24h counted, generated energy loss: 5 * 5 * 24 * 30,=18,000 ten thousand degree electricity.Thermoelectricity operating cost is about 0.15 ~ 0.25 yuan/kilowatt hour according to incompletely statistics; amount at least 2,700 ten thousand yuan of RMB; therefore it is quite large that the generated energy that causes because of shutdown reduces loss in revenue; the more important thing is that stop cleaning is a kind of passive treatment measures, can only alleviate, can not thoroughly separate problem; inevitable or the continuously oepration at full load of unit; also have simultaneously non-programmed halt examination risk, therefore, indirect economic loss can not be estimated.
The scale inhibition cleaning of not stopping transport is online implemented economic cost: sprayed once medication 1.7-2.2 ton, annual about 30 spray medicaments, about 1,100,000 yuan of full year cost in the every 10-12 of medicament days.
By comparative analysis, after this new technology puts into operation, avoided the direct generation of electricity loss that in the past caused by the forced-stopping machine maintenance, reduce simultaneously or solved the equipment operation risk, saved the stop cleaning cost of overhaul.The economic benefit social benefit is remarkable.
Claims (10)
- Clean scale inhibition technique 1.GGH do not stop transport, it is characterized in that: be provided with the high-pressure flushing device that on-line cleaning device and GGH system carry in the GGH system, described on-line cleaning device comprises: chemicals dosing plant and medicament spray equipment, and the output of described chemicals dosing plant is connected with the medicament spray equipment;Described high-pressure flushing device comprises water under high pressure outlet and the high pressure water spraying device that connects by high-pressure water pipeline;Described technique is: guaranteeing in the moistening situation of heat exchange element surface maintenance, the control medicine frequency, calculate the pre-film amount of medicament and medicament spray flux, advance medicine spray 5 ~ 30min by amount of calculation, after medicament sprayed complete interval 5 ~ 30min, the moisturizing of with medicament spray equipment was continuously after the moisturizing 1 ~ 5 time, start high-pressure flushing device, flushing 30 ~ 60min;Described rate of water make-up is 0.01 ~ 0.5 times of medicament total amount;Described medicine frequency was controlled between 5 ~ 20 days.
- 2. GGH according to claim 1 does not stop transport and cleans scale inhibition technique, and it is characterized in that: the pre-film amount of described medicament, its computing formula is: M=S * δ * ρ * 10 -3* λ;Wherein: described M is the pre-film amount of medicament, and unit is in Kg; δ is the medicament film thickness, and unit is in mm, and its scope is 0.03 ~ 0.08mm; S is the heat exchange element gross area, and unit is with m 2Meter; ρ is medicament density, and unit is with Kg/m 3Meter; λ is the medicament penalty coefficient, and its scope is 1.1 ~ 1.2.
- 3. GGH according to claim 1 does not stop transport and cleans scale inhibition technique, it is characterized in that: described medicament spray flux, and its computing formula is:Wherein: described Q is the medicament spray flux, and unit is with m 3/ h meter; M is the pre-film amount of medicament, and unit is in Kg; ρ is medicament density, and unit is with Kg/m 3Meter; T is transfusion time, and unit is in h.
- 4. GGH according to claim 1 does not stop transport and cleans scale inhibition technique, and it is characterized in that: described chemicals dosing plant comprises medicament system and clean water system;Described medicament system comprises dosing tank, filter and compound pump, the input of described dosing tank is connected by pesticide feeding duct with feeding opening, the output of dosing tank is connected by the arrival end of the first pipe-and-filter, the output of filter is connected with the input of compound pump by second pipe, and the medicament delivery side of pump is connected with the medicament spray equipment;Be provided with the first control valve that enters filter for the medicament in the control dosing tank on described the first pipeline;Described clean water system comprises the first clean water pipeline that is connected with the input of dosing tank, the other end of described the first clean water pipeline is connected with the second clean water pipeline, the input of described the second clean water pipeline is connected with the clean mouth of a river, and the output of described the second clean water pipeline is connected with the arrival end of filter.
- 5. GGH according to claim 1 does not stop transport and cleans scale inhibition technique, it is characterized in that: described medicament spray equipment comprises spray supervisor and fan nozzle;Described spray supervisor length is near the radius of GGH;Described fan nozzle, it sprays 45 °～120 ° of fan-shaped angles, and nozzle distance GGH upper surface height is 150 ~ 450mm, so that the liquid of nozzle ejection, its fan-shaped contact-making surface span is 600 ~ 800mm, and the adjacent nozzle ejection liquid range outside is overlapping, and its overlapping width is 50 ~ 100mm.
- 6. GGH according to claim 1 does not stop transport and cleans scale inhibition technique, it is characterized in that: according to the mass percent meter: described medicament is by 20～40% organic carboxylate; 0.01～1% penetration enhancer JFC; 0.01～5% organic phosphonate; 0.01～1% NMF; Surplus is water.
- 7. GGH according to claim 6 does not stop transport and cleans scale inhibition technique, and it is characterized in that: described organic carboxylate is preferred: at least a in the sodium salt of organic carboxyl acid or sylvite or the ammonium salt.
- 8. GGH according to claim 6 does not stop transport and cleans scale inhibition technique, and it is characterized in that: described machine carboxylate is preferred: at least a in Epoxysuccinic acid ammonium, sodium glycollate, potassium acetate or the glycolic acid potassium.
- 9. GGH according to claim 6 does not stop transport and cleans scale inhibition technique, and it is characterized in that: described organic phosphonates is preferred: at least a in ATMP four potassium, HEDP potassium or the HEDP sodium.
- 10. GGH according to claim 6 does not stop transport and cleans scale inhibition technique, and it is characterized in that: described NMF is preferred: a kind of in sodium lactate, potassium lactate or the urea.
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|---|---|---|---|
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|---|---|---|---|
| CN201210593784.4A CN103063082B (en) | 2012-12-31 | 2012-12-31 | Cleaning and anti-scaling process without shut-down of gas-gas heater (GGH) and device thereof |
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| CN105737619A (en) * | 2014-12-12 | 2016-07-06 | 沈阳铝镁设计研究院有限公司 | Online cleaning method for scars of direct heat exchanger for flue gas waste heat utilization of aluminum oxide roasting furnace |
| CN106215707A (en) * | 2016-08-31 | 2016-12-14 | 上海交通大学 | Improve the short-cut method of tin plating poaching wastewater online resource embrane method closed-system performance |
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| CN104181867A (en) * | 2013-05-22 | 2014-12-03 | 天津市通洁高压泵制造有限公司 | PMAC-based five-shaft-linkage evaporator automatic cleaning control system |
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| CN105621636A (en) * | 2016-01-08 | 2016-06-01 | 青岛洁能环保有限公司 | Energy-saving nursing agent of central air conditioning |
| CN106215707A (en) * | 2016-08-31 | 2016-12-14 | 上海交通大学 | Improve the short-cut method of tin plating poaching wastewater online resource embrane method closed-system performance |
| CN109683634A (en) * | 2018-12-11 | 2019-04-26 | 广东电网有限责任公司 | A kind of coal-burning power plant SO2Exceeded control system and its storage medium |
| CN109683634B (en) * | 2018-12-11 | 2022-02-15 | 广东电网有限责任公司 | SO of coal-fired power plant2Superstandard control system and storage medium thereof |
| WO2022113924A1 (en) * | 2020-11-24 | 2022-06-02 | 三菱重工業株式会社 | Desulfurizing device |
| RU2776440C1 (en) * | 2021-12-09 | 2022-07-20 | Акционерное общество "Дальневосточная генерирующая компания" АО "ДГК" | Circulating water supply and treatment device for heat exchange equipment |
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