CN102230292B - Circulation cooling device for chute of soda recovery furnace - Google Patents
Circulation cooling device for chute of soda recovery furnace Download PDFInfo
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- CN102230292B CN102230292B CN2011101713996A CN201110171399A CN102230292B CN 102230292 B CN102230292 B CN 102230292B CN 2011101713996 A CN2011101713996 A CN 2011101713996A CN 201110171399 A CN201110171399 A CN 201110171399A CN 102230292 B CN102230292 B CN 102230292B
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Abstract
The invention discloses a circulation cooling device for a chute of a soda recovery furnace. A cooling water channel is provided with a desalted water inlet, a drain outlet, an overflow vent, a sealing water pipe and a liquid level meter interface, wherein the sealing water pipe is inserted below the liquid surface of the cooling water channel, the liquid level meter interface is connected with a liquid level transmitter; a desalted water outlet at the bottom of the cooling water channel is connected with a circulation cooling water pipe, the outlet of a frequency variable water pump is connected to a cooling water inlet of a heat exchanger, a cooling water outlet of the heat exchanger is connected to the water inlet of a chute water jacket at the lower end of the chute water jacket by virtue of the circulation cooling water pipe, the water outlet of the chute water jacket at the upper end of the chute water jacket is connected to the sealing water pipe of the cooling water channel, the desalted water inlet is arranged at the top of the cooling water channel, the desalted water pipe is used for introducing the desalted water into the cooling water channel by virtue of the desalted water inlet, and the desalted water pipe is provided with a regulating valve. The circulation cooling device disclosed by the invention has simple structure, low operation energy consumption, less water discharge and automatic operation; and a crack of the chute water jacket can be timely alarmed, and an accident is prevented.
Description
Technical field
The present invention relates to the relevant device technical field that the incineration of liquor method reclaims alkali, be specifically related to a kind of cooling back installation that reclaims special boiler (being designated hereinafter simply as alkali recovery furnace) chute for alkali, this device is applicable to the chute with desalted water circulating cooling alkali recovery furnace.
Background technology
The cooling of alkali recycling furnace chute is the important step that guarantees alkali stove normal combustion.The alkali recovery furnace internal combustion produces and about melt temperature that chute flows out is up to 900 ℃, and contains the very strong sulfide that is corrosive.Overheated for preventing the chute metal, guarantee that chute resists high temperature corrosion and mechanical erosion preferably, cooling device is essential.
Up to the present, the correlative study achievement that obtains both at home and abroad mainly contains following several.
1, clear water cooling method
What successfully be used for the earliest alkali recycling furnace chute both at home and abroad is the clear water cooling device, still uses at some alkali recovery furnace now.Its basic principle is, a high-order Rinsing Area is set more than the operating level of alkali recovery furnace, the clear water of tank cools off chute from flowing to Water cooling jacket type chute (approximately 4 meters high), flow to operating level (approximately 10 meters high) through the hot clear water behind the chute water jacket and observe tank (observing tank is used for checking the flow condition of cooling water and washes waste liquid injection throwing in gun), overflow to again factory trench and emit.Its major defect has:
1. use for a long time the clear water cooling easily to cause the fouling of chute water jacket, heat transfer effect descends;
2. the cooling water in the chute water jacket is malleation, in case chute has leakage, on the clear water of normal temperature and the chute approximately the fused mass of 900 ℃ of left and right sides high temperature meet, can blast;
3. the warm water that produces after the cooling causes water resource waste discharged to trench, the rinse dosage of every chute cooling :～6.5m
3/ h.
2, regular circulation cooling water law
Because there is larger defective in the clear water cooling method, begins large-scale combustion furnace the seventies and use recirculated cooling water device.Its basic principle is to adopt desalted water cooling chute; Utilize heat exchanger to reduce the cooling backwater water temperature, carry out recycle; Utilize water stream injection pump (also claiming water ejector) to produce vacuum draw, form little negative pressure, avoid cooling water to flow into combustion furnace, reduced the blast occurrence probability.
Wherein the technical parameter of water stream injection pump is: promote liquid height: 8m, promote fluid flow: 10m
3/ h, power liquid pressure: 0.5MPa (G) discharges fluid pressure: 0.02MPa (G), material AISI316.Every consumption of power of use procedure :～0.55kW/h.
The major defect of the method has:
1. equipment forms complexity, and up-front investment is larger, and equipment is installed complicated;
2. operation energy consumption is larger.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of cooling back installation of alkali recycling furnace chute, this device can prevent the fouling of chute water jacket, can also form the little negative pressure of chute water jacket, prevents cooling water the leak outside water that causes and the contact explositions of high-temperature molten; Apparatus of the present invention overall structure is simple, and operation energy consumption is low, and the water discharge capacity is few, operation automation; The timely crack of alarm chute water jacket, Accident prevention occurs.
To achieve these goals, the present invention is by the following technical solutions:
A kind of cooling back installation of alkali recycling furnace chute, it comprises bosh, variable frequency pump, heat exchanger and PLC control device.
Bosh is provided with desalted water entrance, desalted water outlet, sewage draining exit, overfall, water sealing (sealing water) pipe and interface of the level gauge, and water sealing (sealing water) pipe inserts below the liquid level of bosh, and interface of the level gauge links to each other with fluid level transmitter.
Bosh is located at a flooring (± 0.000 meter) position, the desalted water delivery port of bosh bottom connects circulating cooling water pipe, to be communicated with bosh and variable frequency pump, the outlet of variable frequency pump is connected to the cooling water inlet of heat exchanger by circulating cooling water pipe, the coolant outlet of heat exchanger is connected to the chute water jacket water inlet (approximately 4.00m is high apart from ground) of chute water jacket lower end by circulating cooling water pipe, the chute water jacket delivery port of chute water jacket upper end is connected to the water sealing (sealing water) pipe of bosh by circulating cooling water pipe, wherein, be communicated with and contain one section vertical pipe from the entrance of water sealing (sealing water) pipe to the chute water jacket water outlet height of chute water jacket in the circulating cooling water pipe of water sealing (sealing water) pipe, be beneficial to form the vacuum water leg, cooling water is sucked bosh, namely finish the circulation line of recirculated cooling water.
The desalted water entrance is arranged at the top of bosh, and desalting pipe is introduced bosh by the desalted water entrance with desalted water, is provided with control valve on the desalting pipe, can replenish at any time desalted water to guarantee the liquid level of bosh.
Be provided with exhaust apparatus at the circulating cooling water pipe that links to each other with chute water jacket delivery port, when being used for start the gas in the circulating cooling water pipe discharged, make to be full of water in the circulating cooling water pipe, to guarantee to satisfy the water-filled condition of siphon principle.
The top of heat exchanger and bottom are communicated with cold water pipe and hot-water line respectively, the cold water that is used for heat exchange comes to plant area's cooling tower, introduce heat exchanger by cold water pipe, hot water after the heat exchange is delivered to plant area's cooling tower by hot-water line, be provided with control valve on the hot-water line, be respectively arranged with a temperature sensor on the circulating cooling water pipe at the cooling water inlet of heat exchanger and coolant outlet place.
PLC is instrument control device, is specially by instrument cabinet and computer etc. to form.
The PLC control device is comprised of liquid level demonstration and control module, electrical conductivity demonstration and alarm unit, pressure demonstration and control module, temperature demonstration and control module and temperature display unit.
Control valve on fluid level transmitter and the desalting pipe is connected to liquid level by cable respectively and shows and control module.
With circulating cooling water pipe that chute water jacket delivery port links to each other on, the next door of exhaust apparatus is provided with conductivity sensor, conductivity sensor is connected to electrical conductivity by cable and shows and alarm unit, the abnormal conditions that are used for carrying out the chute water jacket are reported to the police.
Be provided with pressure transmitter at the circulating cooling water pipe that links to each other with chute water jacket water inlet, the frequency converter of pressure transmitter and variable frequency pump is connected to pressure by cable respectively and shows and control module.
The temperature sensor at coolant outlet place and the control valve on the hot-water line are connected to temperature by cable respectively and show and control module.
The temperature sensor at cooling water inlet place is connected to temperature display unit by cable.
The effect of the cooling back installation of above-mentioned alkali recycling furnace chute is as follows:
1. become the circulating cooling water loop.Approximately 60 ℃ have been risen to (strictly from the chute water jacket delivery port water temperature out of alkali recovery furnace, require water temperature to keep below 60 ℃ in the technological operation, be convenience of calculation, by 60 ℃), for carrying out the recycle of cooling water, this part backwater is delivered to heat exchanger lower the temperature, make water temperature be down to 30 ℃, be used further to the chute cooling, can form circulating cooling.The cooling procedure of this device is compared with the clear water cooling method, and year is saved clear water: 6.5m when the separate unit chute cools off
3/ h*24*330 days=51480m
3/ year.Every alkali recovery furnace is furnished with 1～5 chute usually, and namely every alkali recovery furnace can be saved clear water with regard to this: 5.15～25.75 ten thousand stere/years.
2. the formation of chute negative pressure.When chute water jacket delivery port is full of water to the vertical pipe of bosh, because the existence of the water level discrepancy in elevation can produce siphonage, form little negative pressure.Regulate the electric current of variable frequency pump, before its lift can only being delivered to cooling water enter chute water jacket water inlet, namely hydraulic pressure (gauge pressure) is-0.02MPa herein.Under the effect of siphon, make cooling water formation micro-vacuum in the chute water jacket, produce little negative pressure.Compare energy efficient: 0.55kW*24*330 days=4356kW/ in the separate unit chute cooling procedure with the regular circulation cooling method.Be furnished with 1～5 chute by every alkali recovery furnace, every alkali recovery furnace moves therefore using electricity wisely: 4356～21780kW/.
3. the conductivity sensor that arranges on the circulating cooling water pipe of chute water jacket water outlet can be reported to the police to the abnormal conditions of chute water jacket.When the chute water jacket has crackle, produce seepage, combustion product a small amount of on the chute will enter in the chute water jacket because of the little negative pressure in the chute water jacket, the cooling electrical conductivity of water is changed, thereby in time the early warning chute is revealed event, improves security.
The course of work of apparatus of the present invention is described below:
During start, at first input desalted water as recirculated cooling water by desalting pipe from the desalted water entrance of bosh, liquid level by the PLC control device shows and control module, executing agency's phase of the control valve on cable and fluid level transmitter, the desalting pipe shows and the control bosh reaches normal liquid level.Start variable frequency pump, desalted water is transported to successively the water sealing (sealing water) pipe of bosh by circulating cooling water pipe through variable frequency pump, heat exchanger, chute water jacket from the desalted water outlet of bosh.Open the stop valve of exhaust apparatus, allow gas from blast pipe, discharge during exhaust, until recirculated cooling water overflows, thereby then the gas in the emptying circulating cooling water pipe close stop valve, to guarantee being full of water in the pipeline, to produce siphonage, make the chute water jacket form little negative pressure.
The condition of siphon principle:
1, first filled with fluid in the pipe;
2, the peak of pipe must not be higher than the water-column that atmospheric pressure is supported apart from the water surface elevation of upper container;
3, delivery port must be lower than the water surface of upper container, like this so that water outlet oral fluid sheet is subject to downward pressure (atmospheric pressure adds the pressure of water) greater than the atmospheric pressure that makes progress, guarantees the outflow of water.
Normal operation period, detect the circulating cooling water pressure of chute water jacket water inlet by pressure transmitter, signal feedback shows and control module to pressure, after computing, output control signals to the pump variable frequency device, the rotating speed of the variable-frequency motor by regulating variable frequency pump, control variable frequency pump outlet lift is take the circulating cooling water pressure that guarantees chute water jacket water inlet as negative pressure, its pressure should be (gauge pressure) :-0.04MPa+0.02MPa=-0.02MPa, and (60 ℃ of saturated vapor pressure: 0.02Mpa, water column is high～4m)
When the crack appears in the chute water jacket, the detection signal that the electrical conductivity of PLC control device shows and alarm unit feeds back by conductivity sensor shows the variation of the recirculated cooling water conductivity value in the pipeline, and by the high warning of programmed decision conductivity value, whether contaminated to confirm recirculated cooling water, thus the serious situation of determining the crackle of chute water jacket is also reported to the police.Up and down atmospheric pressure offsets the pressure (absolute pressure) before the chute water jacket water inlet :-0.04MPa+0.02MPa=-0.02MPa (60 ℃ of saturated vapor pressures: 0.02MPa) in this moment chute water jacket.
Advantage of the present invention and beneficial effect are:
1) can prevent effectively that the alkali recycling furnace chute metal is overheated, resists high temperature corrosion and mechanical erosion preferably.
2) adopt the desalted water after processing to recycle, effectively prevent the living dirt of chute water jacket, improve heat transfer effect.The while saving water resource.Compare with the clear water cooling method, every burning waste liquid dried solid content amount is that 150～2000 tons/day alkali recovery furnace can be saved clear water with regard to this: 5.15～25.75 ten thousand stere/years.
3) utilize the vacuum water leg to form the little negative pressure of chute water jacket, prevent water and fused mass contact explositions that cooling water leaks outside and causes, avoided simultaneously the water stream injection pump suction to form the high energy consumption that negative pressure produces; Compare with the regular circulation cooling method, every burning waste liquid dried solid content amount is therefore using electricity wisely: 4356～21780kW/ of alkali recovery furnace operation of 150～2000 tons/day.
4) automaticity is high, and in time early warning chute water jacket is revealed event, and temperature control is uniform and stable, stable, safe.
In a word, apparatus of the present invention have solved the cooling problem of alkali recycling furnace chute, have improved the fouling that in the past brought with clear water cooling alkali recycling furnace chute; Eliminated the contact explositions danger that operation under positive pressure brings, reduced and utilized pump to take out the high energy consumption that generation chute water jacket negative pressure is brought; Cycling use of water has been saved water resource, has preferably application prospect in papermaking wastewater recovery field.
Description of drawings
Fig. 1 is the structural representation of the cooling back installation of a kind of alkali recycling furnace chute of the present invention.
Fig. 2 is the structural representation of the bosh in apparatus of the present invention.
Description of reference numerals is as follows: 1-bosh, 1-1-desalted water entrance, the outlet of 1-2-desalted water, 1-3-sewage draining exit, 1-4-overfall, 1-5-water sealing (sealing water) pipe, 1-6-interface of the level gauge; The 2-variable frequency pump, 2-1 variable-frequency motor, 2-2-frequency converter; The 3-heat exchanger, 3-1-cooling water inlet, 3-2-coolant outlet, 3-3-cooling water inlet, 3-4-hot water outlet; 4-chute water jacket, 4-1-chute water jacket water inlet, 4-2-chute water jacket delivery port; The 5-desalting pipe; The 6-circulating cooling water pipe; The 7-cold water pipe; The 8-hot-water line; The 9-blow-off pipe; The 10-overflow pipe; The 11-blowoff valve; 12-exhaust apparatus (exhaust apparatus comprises: 12-1-stop valve, 12-2-blast pipe), 12-1-stop valve, 12-2-blast pipe; The 13-control valve; The 14-1-fluid level transmitter, 14-2-conductivity sensor, 14-3-pressure transmitter, 14-4-temperature sensor; 15-PLC control device, 15-1-liquid level show and control module, the demonstration of 15-2-electrical conductivity and alarm unit, and the demonstration of 15-3-pressure and control module, the 15-4-temperature shows and control module, the 15-5-temperature display unit.
The specific embodiment
Further set forth the present invention below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of cooling back installation of alkali recycling furnace chute, it comprises bosh 1, variable frequency pump 2, heat exchanger 3 and PLC control device 15.
Bosh 1 is provided with desalted water entrance 1-1, desalted water outlet 1-2, sewage draining exit 1-3, overfall 1-4, water sealing (sealing water) pipe 1-5 and interface of the level gauge 1-6, water sealing (sealing water) pipe 1-5 inserts below the liquid level of bosh 1, interface of the level gauge 1-6 links to each other with fluid level transmitter 14-1, sewage draining exit 1-3 place connects the desalted water that blow-off pipe 9 is used for periodic replacement bosh 1, be provided with blowoff valve 11 on the blow-off pipe 9, overfall 1-4 place connects overflow pipe 10 and is used for discharging the too much recirculated cooling water of bosh 1.
Bosh 1 is located at a flooring (± 0.000 meter) position, the desalted water delivery port 1-2 of bosh 1 bottom connects circulating cooling water pipe 6, to be communicated with bosh 1 and variable frequency pump 2, the outlet of variable frequency pump 2 is connected to the cooling water inlet 3-1 of heat exchanger 3 by circulating cooling water pipe 6, the coolant outlet 3-2 of heat exchanger 3 is connected to the chute water jacket water inlet 4-1 (approximately 4.00m is high apart from ground) of chute water jacket 4 lower ends by circulating cooling water pipe 6, the chute water jacket delivery port 4-2 of chute water jacket 4 upper ends is connected to the water sealing (sealing water) pipe 1-5 of bosh 1 by circulating cooling water pipe 6, wherein, be communicated with and contain one section vertical pipe from the entrance of water sealing (sealing water) pipe 1-5 to chute water jacket delivery port 4-2 height in the circulating cooling water pipe 6 of water sealing (sealing water) pipe 1-5, be beneficial to form the vacuum water leg, recirculated cooling water is sucked bosh 1, namely finish the circulation line of recirculated cooling water.
Desalted water entrance 1-1 is arranged at the top of bosh 1, and desalting pipe 5 is introduced bosh 1 by desalted water entrance 1-1 with desalted water, is provided with control valve 13 on the desalting pipe 5, can replenish at any time desalted water to guarantee the liquid level of bosh 1.
Be provided with exhaust apparatus 12 at the circulating cooling water pipe 6 that joins with chute water jacket delivery port 4-2, when being used for start the gases in the circulating cooling water pipe 6 discharged, make in the circulating cooling water pipe 6 to be full of water, to guarantee to satisfy the water-filled condition of siphon principle.
The top of heat exchanger 3 and bottom are communicated with cold water pipe 7 and hot-water line 8 respectively, the cold water that is used for heat exchange comes to plant area's cooling tower, introduce heat exchanger 3 by cold water pipe 7, hot water after the heat exchange is delivered to plant area's cooling tower by hot-water line 8, be provided with control valve 13 on the hot-water line 8, be respectively arranged with a temperature sensor 14-4 on the circulating cooling water pipe 6 at the cooling water inlet 3-1 of heat exchanger 3 and coolant outlet 3-2 place.
PLC is instrument control device, is specially by instrument cabinet and computer etc. to form.
PLC control device 15 is shown by liquid level and control module 15-1, electrical conductivity shows and alarm unit 15-2, pressure shows and control module 15-3, temperature shows and control module 15-4 and temperature display unit 15-5 form.
To being described in detail as follows of PLC control device 15:
PLC control device 15 is monitored liquid level, temperature, pressure, electrical conductivity and motor speed by programmable logic controller (PLC) and host computer or is regulated and control, as shown in phantom in Figure 1.Be specially:
Liquid level shows and control module 15-1, detect the liquid level of bosh 1 by fluid level transmitter 14-1, signal feeds back to PLC by cable, after the PLC computing, output control signals to the executing agency of desalting pipe 5 adjusted valves 13, the aperture of the valve by regulating desalting pipe 5, control flow through the desalination water yield of desalting pipe 5 with the liquid level that guarantees bosh 1 at normal height.The liquid level value of bosh 1 shows at host computer.
Electrical conductivity shows and alarm unit 15-2, detects the conductivity value of the recirculated cooling water at chute water jacket delivery port 4-2 place by conductivity sensor 14-2, and signal feeds back to PLC by cable, and PLC programming conductivity value is high reports to the police.Judge by conductivity value whether cooling water is contaminated, thereby determine the cracks of chute water jacket.The conductivity value of chute water jacket delivery port 4-2 place recirculated cooling water shows at host computer.
Pressure shows and control module 15-3, detect the pressure of the recirculated cooling water at chute water jacket water inlet 4-1 place by pressure transmitter 14-3, signal feeds back to PLC by cable, after the PLC computing, output control signals to the frequency converter 2-2 of variable frequency pump 2, by regulating the rotating speed of variable-frequency motor 2-1, control exit of pump lift is to guarantee that chute water jacket water inlet 4-1 place circulating cooling water pressure is as little negative pressure.The recirculated cooling water pressure value at chute water jacket water inlet 4-1 place shows at host computer.
Temperature shows and control module 15-4, the temperature sensor 14-4 at the coolant outlet 3-2 place by heat exchanger 3 detects the recirculated cooling water water temperature after the heat exchange, signal feeds back to PLC by cable, through outputing control signals to the executing agency of the control valve 13 on the hot-water line 8 after the PLC computing, the flow through cool water quantity of heat exchanger 3 of the aperture of hot-water line 8 valves by regulating heat exchanger 3, control is not higher than 30 ℃ to guarantee the recirculated cooling water water temperature after the heat exchange.The water temperature numerical value of recirculated cooling water shows at host computer after the heat exchange.
Temperature display unit 15-5, the temperature sensor 14-4 at the cooling water inlet 3-1 place by heat exchanger 3 detect recirculated cooling water water temperature before the heat exchange, and signal is delivered to PLC by cable, and Temperature numerical shows at host computer.
Claims (4)
1. the cooling back installation of an alkali recycling furnace chute, it is characterized in that: it comprises bosh, variable frequency pump, heat exchanger and PLC control device;
Described bosh is provided with desalted water entrance, desalted water outlet, sewage draining exit, overfall, water sealing (sealing water) pipe and interface of the level gauge, and water sealing (sealing water) pipe inserts below the liquid level of bosh, and interface of the level gauge links to each other with fluid level transmitter;
Described bosh is located at the Stall ground location, the desalted water delivery port of bosh bottom connects circulating cooling water pipe, to be communicated with bosh and variable frequency pump, the outlet of variable frequency pump is connected to the cooling water inlet of heat exchanger by circulating cooling water pipe, the coolant outlet of heat exchanger is connected to the chute water jacket water inlet of chute water jacket lower end by circulating cooling water pipe, the chute water jacket delivery port of chute water jacket upper end is connected to the water sealing (sealing water) pipe of bosh by circulating cooling water pipe, wherein, be communicated with and contain one section vertical pipe from the entrance of water sealing (sealing water) pipe to chute water jacket water outlet height in the circulating cooling water pipe of water sealing (sealing water) pipe;
Described desalted water entrance is arranged at the top of bosh, and desalting pipe is introduced bosh by the desalted water entrance with desalted water, is provided with control valve on the desalting pipe;
Be provided with exhaust apparatus at the circulating cooling water pipe that links to each other with described chute water jacket delivery port.
2. the cooling back installation of alkali recycling furnace chute as claimed in claim 1, it is characterized in that: the top of described heat exchanger and bottom are communicated with cold water pipe and hot-water line respectively, the cold water that is used for heat exchange comes to plant area's cooling tower, introduce heat exchanger by cold water pipe, hot water after the heat exchange is delivered to plant area's cooling tower by hot-water line, be provided with control valve on the hot-water line, be respectively arranged with a temperature sensor on the circulating cooling water pipe at the cooling water inlet of heat exchanger and coolant outlet place.
3. the cooling back installation of alkali recycling furnace chute as claimed in claim 1 or 2 is characterized in that: described PLC control device is comprised of liquid level demonstration and control module, electrical conductivity demonstration and alarm unit, pressure demonstration and control module, temperature demonstration and control module and temperature display unit.
4. the cooling back installation of alkali recycling furnace chute as claimed in claim 3 is characterized in that: the control valve on described fluid level transmitter and the desalting pipe is connected to liquid level by cable respectively and shows and control module;
On the circulating cooling water pipe that joins with described chute water jacket delivery port, the next door of exhaust apparatus is provided with conductivity sensor, conductivity sensor is connected to electrical conductivity by cable and shows and alarm unit;
Be provided with pressure transmitter at the circulating cooling water pipe that joins with described chute water jacket water inlet, the frequency converter of pressure transmitter and variable frequency pump is connected to pressure by cable respectively and shows and control module;
The temperature sensor at described coolant outlet place and the control valve on the hot-water line are connected to temperature by cable respectively and show and control module;
The temperature sensor at described cooling water inlet place is connected to temperature display unit by cable.
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| CN2011101713996A CN102230292B (en) | 2011-06-23 | 2011-06-23 | Circulation cooling device for chute of soda recovery furnace |
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|---|---|---|---|
| CN2011101713996A CN102230292B (en) | 2011-06-23 | 2011-06-23 | Circulation cooling device for chute of soda recovery furnace |
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| CN102230292B true CN102230292B (en) | 2013-05-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102677077A (en) * | 2011-12-12 | 2012-09-19 | 北京星和众工设备技术股份有限公司 | Damage monitoring system for graphite heat exchanger on pickling line |
| CN102644913B (en) * | 2012-04-25 | 2014-08-20 | 武汉锅炉集团特种锅炉工程有限责任公司 | Residual heat utilization method of cooling water for black liquor recovery boiler chute and system thereof |
| CN107599261A (en) * | 2017-11-02 | 2018-01-19 | 绍兴柯桥橡胶机械厂 | A kind of double-door type rubber vulcanizing tank |
| CN112251584A (en) * | 2020-09-30 | 2021-01-22 | 张家港扬子江冷轧板有限公司 | Cooling device for high-temperature instrument in annealing furnace |
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| CN2561099Y (en) * | 2002-08-05 | 2003-07-16 | 广州市高澜水技术有限公司 | Closed circulating water cooling apparatus |
| CN2600476Y (en) * | 2002-12-29 | 2004-01-21 | 山东晨鸣纸业集团股份有限公司 | Soda recovery causticization green liquor digestion drum |
| CN1757824A (en) * | 2005-08-01 | 2006-04-12 | 冯长祯 | Practical alkali recovery furnace |
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