CN112484007B - Series connection air pressure type steam condensate continuous recovery device and condensate recovery method - Google Patents
Series connection air pressure type steam condensate continuous recovery device and condensate recovery method Download PDFInfo
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- CN112484007B CN112484007B CN202011175067.0A CN202011175067A CN112484007B CN 112484007 B CN112484007 B CN 112484007B CN 202011175067 A CN202011175067 A CN 202011175067A CN 112484007 B CN112484007 B CN 112484007B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/04—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass by drop in pressure of high-pressure hot water within pressure- reducing chambers, e.g. in accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/26—Steam-separating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/50—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers for draining or expelling water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to a serial air pressure type continuous recovery device and a condensate recovery method for steam condensate, wherein the recovery device comprises an atmospheric flash tank, a condensate buffer collection tank, a first valve, a second valve, a third valve, a pressure relief pipeline and a fourth valve; the invention cancels a condensate pump, realizes continuous recovery of steam condensate by utilizing the normal-pressure flash tank and the condensate buffer collecting tank which are connected in series from top to bottom, improves the economy and the operation flexibility of equipment, reduces noise, saves occupied area, and effectively solves the problem of discontinuous or continuous recovery of steam condensate in small flow in a chemical device; meanwhile, the mode that the normal-pressure flash tank and the condensate buffer collecting tank are arranged up and down is favorable for buffering condensate output, and the stability of condensate output is improved.
Description
Technical Field
The invention relates to a serial connection air pressure type continuous recovery device and a condensate recovery method for steam condensate.
Background
At present, the heat loss of steam heat exchange equipment and a steam pipeline of a chemical device can generate a large amount of steam condensate, and in order to meet increasingly strict energy-saving and environment-friendly requirements, the steam condensate is indispensable to be completely recycled. However, the discharge of low-pressure steam condensate in the device is often disordered and discontinuous, and the pressure level is high, which is not beneficial to primary recovery or high recovery cost.
In the prior art, the recovery of low-pressure steam condensate generally adopts normal-pressure flash evaporation to obtain condensate with the temperature close to 100 ℃, and the condensate is pressurized to about 0.6MPag by a pump and then output to a battery limit. In order to meet the requirement of continuous operation of chemical devices, two centrifugal pumps which are mutually standby are generally arranged. And because the amount of the recovered condensate is small, the recovery value is generally lower than the equipment investment and the power consumption. The invention discloses a condensate recovery system with secondary steam recycling, which is invented in the Chinese patent with the application number of 201520350416.6, and has a plurality of problems although the low-pressure steam condensate is recovered.
The following problems generally exist in the existing condensate recovery system:
1) because the steam condensate has higher temperature, the pump pumping is adopted, so that cavitation and pump body corrosion are easily caused;
2) because the discharge of the low-pressure steam condensate of the chemical device is often disordered and discontinuous, the capacity of the pump is difficult to determine, the requirement on the operating range of the pump is wide, and the type selection of the pump is difficult;
3) because equipment is more, whole lime set recovery unit takes up an area of greatly, need set up the pump house, and the civil engineering expense is high.
4) The running noise of the mobile equipment is large.
Disclosure of Invention
The invention aims to solve the first technical problem and provide a serial air pressure type continuous steam condensate recovery device which can realize continuous recovery on the basis of canceling the existing condensate pump, thereby saving energy, reducing consumption, reducing the occupied area of equipment and reducing noise.
The second technical problem to be solved by the present invention is to provide a condensate recovery method using the above-mentioned serial pneumatic steam condensate continuous recovery device, in view of the current state of the prior art.
The technical scheme adopted by the invention for solving at least one technical problem is as follows: the utility model provides a continuous recovery unit of series connection vapour-pressure type steam lime set which characterized in that: comprises that
The top of the normal-pressure flash tank is provided with a steam outlet, the bottom of the normal-pressure flash tank is provided with a first condensate output port, and the side part of the normal-pressure flash tank is provided with a steam condensate input port;
the condensate buffer collecting tank is arranged below the normal-pressure flash tank, the top of the condensate buffer collecting tank is communicated with the first condensate outlet through a communicating pipe, a pressurizing pipeline capable of inputting pressurized gas into the condensate buffer collecting tank is arranged on the side of the condensate buffer collecting tank, and a second condensate outlet is formed in the bottom of the condensate buffer collecting tank;
the first valve is arranged on the communicating pipe and used for controlling whether the communicating pipe is communicated or not;
the second valve is arranged on the condensate output pipeline and used for controlling the communication of the condensate output pipeline;
the third valve is arranged on the pressurizing pipeline and used for controlling whether the pressurizing pipeline is communicated or not;
the pressure relief pipeline is connected to the pressurization pipeline and used for relieving pressure of the condensate buffer collection tank; and
and the fourth valve is arranged on the pressure relief pipeline and is used for controlling the communication of the pressure relief pipeline.
As the improvement, normal pressure flash tank, lime set buffering collecting vessel arrange from top to bottom, just the roof of lime set buffering collecting vessel constitutes the diapire of normal pressure flash tank, the roof of lime set buffering collecting vessel is the arc of upwards arching. Adopt such structure, not only be favorable to simplifying equipment structure, be convenient for assemble between ordinary pressure flash tank and the lime set buffering collecting vessel, the lime set buffering collecting vessel adopts the top cap of arc structure moreover, is favorable to improve equipment intensity and to the supporting effect to ordinary pressure flash tank, in addition, also is convenient for be defeated toward the lime set buffering collecting vessel with the hydrops in the ordinary pressure flash tank.
Preferably, equal vertical extension of ordinary pressure flash tank, condensate buffering holding vessel, just the diameter of ordinary pressure flash tank is less than/equal to the diameter of condensate buffering holding vessel, first condensate delivery outlet is located the tangent plane in top with the arc. This structure is advantageous for improving the continuity of liquid delivery.
Preferably, be provided with the overflow pipe on the ordinary pressure flash tank, this overflow pipe passes the lateral wall at ordinary pressure flash tank middle part and arranges and outside the ordinary pressure flash tank, the edge that the vertical extension of second end edge ordinary pressure flash tank inner wall reaches the arc, the lower extreme of overflow pipe is located first lime set delivery outlet below. When the effusion is overfull to the ordinary pressure flash tank, unnecessary effusion is discharged to the accessible overflow pipe to guarantee the whole operation of equipment.
Preferably, a wire mesh demister arranged around the steam outlet is arranged on the inner top wall of the normal-pressure flash tank. To improve the gas-liquid separation efficiency.
Preferably, the pressure pipeline is provided with a pressure regulating valve which can control the pressure of the pressurized gas source to be 1-2 barg higher than the pressure of a condensate pipe network at the downstream of the condensate output pipeline. So as to improve the safety of the equipment operation.
Preferably, a silencer is arranged on the pressure relief pipeline. To reduce noise.
In the invention, the first valve, the second valve, the third valve and the fourth valve are controlled by the same control system, and the condensate buffer collecting tank is also provided with a pressure detector and a liquid level detector which are in electric signal connection with the control system.
Preferably, an anti-vortex baffle arranged around the second condensate outlet is arranged on the inner bottom wall of the condensate buffering and collecting tank. The structure is favorable for accurate liquid level control.
The condensate recovery method using the series connection air pressure type continuous steam condensate recovery device is characterized by comprising the following steps:
(1) the medium-low pressure steam condensate from a chemical device enters an atmospheric flash tank through a steam condensate inlet to carry out atmospheric flash evaporation to obtain a small amount of steam and a large amount of steam condensate at the temperature close to 100 ℃;
(2) a small amount of steam obtained in the step (1) enters an exhaust steam recycling device from a steam outlet at the top of the normal-pressure flash tank, and a large amount of steam condensate with the operation temperature close to 100 ℃ enters a condensate buffer collecting tank through a communicating pipe under the action of gravity to accumulate liquid;
at this time, the states of the valves are: the first valve and the fourth valve are opened, and the second valve and the third valve are closed;
(3) when the highest liquid level is reached in the condensate buffer collecting tank, closing the first valve and the fourth valve, simultaneously respectively opening the third valve to pressurize the condensate buffer collecting tank and opening the second valve to drain the condensate buffer collecting tank;
at the moment, the normal-pressure flash tank begins to accumulate liquid;
(4) when the liquid level in the condensate buffer collection tank is reduced to the lower limit, closing the second valve, closing the third valve, and opening the fourth valve to start pressure relief;
(5) when the pressure in the condensate buffer collection tank is reduced to the low limit, the pressure relief is finished, the process is repeated again to enter the liquid accumulation process, and the continuous collection and the intermittent delivery of the steam condensate are realized through the circular operation.
Preferably, in the step (3), after the first valve and the fourth valve are closed, delaying for 2-5 s, and then opening the third valve and the second valve; in the step (4), after the second valve is closed, the third valve is closed and the fourth valve is opened after delaying for 2-5 s. So as to improve the safety of the equipment operation.
Compared with the prior art, the invention has the advantages that: according to the invention, a condensate pump commonly used in the prior art is cancelled, and continuous recovery of steam condensate is realized by utilizing the normal-pressure flash tank and the condensate buffer collecting tank which are connected in series from top to bottom, so that the economy and the operation flexibility of equipment are improved, the noise is reduced, the floor area is saved, and the problem of discontinuous or continuous recovery of steam condensate in a chemical device at a small flow rate is effectively solved; meanwhile, the mode that the normal-pressure flash tank and the condensate buffer collecting tank are arranged up and down is favorable for buffering condensate output, and the stability of condensate output is improved.
Drawings
FIG. 1 is a flow chart of an apparatus according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following examples of the drawings.
As shown in fig. 1, the serial pneumatic vapor condensate continuous recovery device of the present embodiment includes:
the atmospheric flash tank V1 is provided with a steam outlet 11 at the top, a first condensate output port 12 at the bottom and a steam condensate input port 13 at the side part of the atmospheric flash tank 1;
the condensate buffer collecting tank V2 is arranged below the normal-pressure flash tank 1, the top of the condensate buffer collecting tank V2 is communicated with the first condensate output port 12 through a communicating pipe 3, the side part of the condensate buffer collecting tank 2 is provided with a pressurizing pipeline 4 capable of inputting pressurized gas into the condensate buffer collecting tank 2, and the bottom of the condensate buffer collecting tank V2 is provided with a second condensate output port 21; the pressurized gas is nitrogen;
first valve XV1, provided in communication pipe 3, for controlling whether communication pipe 3 is connected or not;
the second valve XV2, the second condensate outlet 21 is connected with the condensate outlet pipe 121, the second valve XV2 is arranged on the condensate outlet pipe 121 for controlling the communication of the condensate outlet pipe 121;
a third valve XV3, arranged on the pressurizing pipeline 4, for controlling the communication of the pressurizing pipeline 4;
the pressure relief pipeline 5 is vertically connected to the pressurization pipeline 4 and used for relieving pressure of the condensate buffer collection tank V2; and
and the fourth valve XV4 is arranged on the pressure relief pipeline 5 and is used for controlling the communication of the pressure relief pipeline 5.
The normal-pressure flash tank V1 and the condensate buffer collecting tank V2 are vertically arranged, the top wall of the condensate buffer collecting tank V2 forms the bottom wall of the normal-pressure flash tank V1, and the top wall of the condensate buffer collecting tank V2 is an arc-shaped plate 22 which is arched upwards. Adopt such structure, not only be favorable to simplifying the equipment structure, be convenient for assemble between ordinary pressure flash tank V1 and the condensate buffer collection tank V2, condensate buffer collection tank V2 adopts the top cap of arc structure moreover, be favorable to improving equipment intensity and to the supporting effect of ordinary pressure flash tank V1, in addition, also be convenient for carry the hydrops in the ordinary pressure flash tank V1 to in the condensate buffer collection tank V2.
Above-mentioned ordinary pressure flash tank V1, the equal vertical extension of condensate buffering collection tank V2, and the diameter of ordinary pressure flash tank V1 is less than or equal to condensate buffering collection tank V2's diameter, and first condensate delivery outlet 12 is located the tangent plane in top with arc 22, and this structure is favorable to improving the continuity that liquid carried.
In this embodiment, an overflow pipe 6 is disposed on the atmospheric flash tank V1, the overflow pipe 6 is disposed through the side wall in the middle of the atmospheric flash tank V1, the first end of the overflow pipe is located outside the atmospheric flash tank V1, the second end of the overflow pipe vertically extends to the edge of the arc plate 22 along the inner wall of the atmospheric flash tank V1, and the lower end of the overflow pipe 6 is located below the first condensate outlet 12. When the hydrops appears in ordinary pressure flash tank V1 and is overfull, unnecessary hydrops is discharged through overflow pipe 6 to guarantee the whole operation of equipment.
The inner top wall of the atmospheric flash tank V1 of the embodiment is provided with a wire mesh demister 14 arranged around the steam outlet to improve the gas-liquid separation efficiency. The pressure pipeline 4 is provided with a pressure regulating valve 41 which can control the pressure of a pressurized gas source to be 1-2 barg higher than the pressure of a condensate pipe network at the downstream of the condensate output pipeline 121, and the pressure of the pressurized gas is 5-10 barg so as to improve the operation safety of the equipment. A muffler S1 is provided on the pressure discharge duct 5 to reduce noise.
In this embodiment, the first valve XV1, the second valve XV2, the third valve XV3, and the fourth valve XV4 are controlled by the same control system, and the condensate buffer collecting tank V2 is further provided with a pressure detector 23 and a liquid level detector 24 electrically connected to the control system. Be provided with the vortex-proof baffle 25 of arranging around second lime set delivery outlet 21 on the interior diapire of lime set buffering collection tank V2, this structure is favorable to the liquid level control accuracy.
The condensate recovery method using the above-mentioned series connection pneumatic vapor condensate continuous recovery device in this embodiment is as follows:
the middle-low pressure steam condensate from the chemical device enters V1 through a first condensate outlet 12 to be subjected to normal pressure flash evaporation, a small amount of steam enters a dead steam recycling device from a steam outlet 11 at the top of V1, a large amount of steam condensate with the residual operation temperature close to 100 ℃ enters V2 through a communicating pipe 3 from V1 to V2 due to the action of gravity to be subjected to liquid accumulation, and the states of all switch valves are as follows: XV1, XV4 open, XV2, XV3 closed;
when the V2 reaches the maximum liquid Level (LSH), the program automatically closes XV1 and XV4, and simultaneously delays to open XV3 and XV2 for 2s and 5s respectively to charge and discharge the V2, and then V1 starts to accumulate liquid;
when the liquid level of V2 drops to the lower limit (LSL), the program automatically closes XV2, simultaneously delays closing XV3 for 2s, delays opening XV4 for 5s to start V2 pressure relief;
when the pressure of the V2 is reduced to a low limit (PSL), the pressure relief is finished, and the liquid accumulation step is carried out, so that the continuous collection and the intermittent delivery of the steam condensate are realized by the circulation operation.
In the process, the operation states of the steps XV1 to XV4 of V1 and V2 are as follows:
(Note: O-open, C-close, PSH, PSL-pressure high-low interlock, LSH, LSL liquid level high-low interlock)
When the V2 is used for pressurizing, draining and depressurizing, the V1 is used for buffering, so that the collection of the steam condensate is kept continuous. During design, through reasonable selection of the volumes of V1 and V2 and the sizes of related pipelines, the buffering time of V1 needs to be ensured to be longer than the time required by V2 for pressurizing, draining and depressurizing.
Claims (9)
1. The utility model provides a continuous recovery unit of series connection vapour-pressure type steam lime set which characterized in that: comprises that
The top of the normal-pressure flash tank is provided with a steam outlet, the bottom of the normal-pressure flash tank is provided with a first condensate output port, and the side part of the normal-pressure flash tank is provided with a steam condensate input port;
the condensate buffer collecting tank is arranged below the normal-pressure flash tank, the top of the condensate buffer collecting tank is communicated with the first condensate outlet through a communicating pipe, a pressurizing pipeline capable of inputting pressurized gas into the condensate buffer collecting tank is arranged on the side of the condensate buffer collecting tank, and a second condensate outlet is formed in the bottom of the condensate buffer collecting tank;
the first valve is arranged on the communicating pipe and used for controlling whether the communicating pipe is communicated or not;
the second valve is arranged on the condensate output pipeline and used for controlling the communication of the condensate output pipeline;
the third valve is arranged on the pressurizing pipeline and used for controlling whether the pressurizing pipeline is communicated or not;
the pressure relief pipeline is connected to the pressurization pipeline and used for relieving pressure of the condensate buffer collection tank; and
the fourth valve is arranged on the pressure relief pipeline and is used for controlling whether the pressure relief pipeline is communicated or not;
the normal pressure flash tank and the condensate buffering collection tank are arranged from top to bottom, the top wall of the condensate buffering collection tank forms the bottom wall of the normal pressure flash tank, and the top wall of the condensate buffering collection tank is an upwards arched arc-shaped plate.
2. The serial pneumatic vapor-liquid continuous recovery device of claim 1, wherein: the equal vertical extension of ordinary pressure flash tank, lime set buffering collecting vessel, just the diameter of ordinary pressure flash tank is less than or equal to the diameter of lime set buffering collecting vessel, first lime set delivery outlet is located the tangent plane in top with the arc.
3. The continuous recycling device of series connection pneumatic vapor-liquid condensate as claimed in claim 2, wherein: be provided with the overflow pipe on the ordinary pressure flash tank, this overflow pipe passes the lateral wall at ordinary pressure flash tank middle part and arranges and first end is located outside the ordinary pressure flash tank, the edge of vertical extension to the arc along ordinary pressure flash tank inner wall is held to the second, the lower extreme of overflow pipe is located first lime set delivery outlet below.
4. The serial pneumatic vapor-liquid continuous recovery device according to claim 1, 2 or 3, wherein: and a wire mesh demister arranged around the steam outlet is arranged on the inner top wall of the normal-pressure flash tank.
5. The serial pneumatic vapor-liquid continuous recovery device according to claim 1, 2 or 3, wherein: and the pressurizing pipeline is provided with a pressure regulating valve which can control the pressure of a pressurizing air source to be 1-2 barg higher than the pressure of a condensate pipe network at the downstream of the condensate output pipeline.
6. The serial pneumatic vapor-liquid continuous recovery device according to claim 1, 2 or 3, wherein: and a silencer is arranged on the pressure relief pipeline.
7. The serial pneumatic vapor-liquid continuous recovery device according to claim 1, 2 or 3, wherein: and an anti-vortex baffle arranged around the second condensate outlet is arranged on the inner bottom wall of the condensate buffer collecting tank.
8. The condensate recovery method using the series-connection pneumatic vapor condensate continuous recovery device as claimed in any one of claims 1 to 7 is characterized by comprising the following steps of:
(1) the medium-low pressure steam condensate from a chemical device enters an atmospheric flash tank through a steam condensate inlet to carry out atmospheric flash evaporation to obtain a small amount of steam and a large amount of steam condensate at the temperature close to 100 ℃;
(2) a small amount of steam obtained in the step (1) enters an exhaust steam recycling device from a steam outlet at the top of the normal-pressure flash tank, and a large amount of steam condensate with the operation temperature close to 100 ℃ enters a condensate buffer collecting tank through a communicating pipe under the action of gravity to accumulate liquid;
at this time, the states of the valves are: the first valve and the fourth valve are opened, and the second valve and the third valve are closed;
(3) when the highest liquid level is reached in the condensate buffer collecting tank, closing the first valve and the fourth valve, simultaneously respectively opening the third valve to pressurize the condensate buffer collecting tank and opening the second valve to drain the condensate buffer collecting tank;
at the moment, the normal-pressure flash tank begins to accumulate liquid;
(4) when the liquid level in the condensate buffer collection tank is reduced to a lower limit, closing the second valve, closing the third valve, and opening the fourth valve to start pressure relief;
(5) when the pressure in the condensate buffer collection tank is reduced to the low limit, the pressure relief is finished, the process is repeated again to enter the liquid accumulation process, and the continuous collection and the intermittent delivery of the steam condensate are realized through the circular operation.
9. The condensate recovery method according to claim 8, wherein: in the step (3), after the first valve and the fourth valve are closed, delaying for 2-5 s, and then opening the third valve and the second valve; in the step (4), after the second valve is closed, the third valve is closed and the fourth valve is opened after delaying for 2-5 s.
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| CN202011175067.0A CN112484007B (en) | 2020-10-28 | 2020-10-28 | Series connection air pressure type steam condensate continuous recovery device and condensate recovery method |
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| CN202011175067.0A CN112484007B (en) | 2020-10-28 | 2020-10-28 | Series connection air pressure type steam condensate continuous recovery device and condensate recovery method |
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| CN112484007B true CN112484007B (en) | 2022-09-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443420A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Crude oil deep vacuum distillation process and system |
| CN206315492U (en) * | 2016-12-21 | 2017-07-11 | 山西页岩气有限公司 | Device for separating sulfuric acid and reaction product |
| CN106989376A (en) * | 2017-04-19 | 2017-07-28 | 中盐安徽红四方股份有限公司 | Refine the substantially stabilized recycling system of workshop byproduct steam |
| CN108423727A (en) * | 2018-05-22 | 2018-08-21 | 中国华能集团清洁能源技术研究院有限公司 | A kind of coal gasified black water vacuum flashing device and working method |
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2020
- 2020-10-28 CN CN202011175067.0A patent/CN112484007B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443420A (en) * | 2010-10-13 | 2012-05-09 | 中国石油化工股份有限公司 | Crude oil deep vacuum distillation process and system |
| CN206315492U (en) * | 2016-12-21 | 2017-07-11 | 山西页岩气有限公司 | Device for separating sulfuric acid and reaction product |
| CN106989376A (en) * | 2017-04-19 | 2017-07-28 | 中盐安徽红四方股份有限公司 | Refine the substantially stabilized recycling system of workshop byproduct steam |
| CN108423727A (en) * | 2018-05-22 | 2018-08-21 | 中国华能集团清洁能源技术研究院有限公司 | A kind of coal gasified black water vacuum flashing device and working method |
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