CN113154352A - Efficient condensate recovery device and process - Google Patents
Efficient condensate recovery device and process Download PDFInfo
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- CN113154352A CN113154352A CN202110240232.4A CN202110240232A CN113154352A CN 113154352 A CN113154352 A CN 113154352A CN 202110240232 A CN202110240232 A CN 202110240232A CN 113154352 A CN113154352 A CN 113154352A
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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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
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Abstract
The invention relates to a condensate high-efficiency recovery device which comprises a flash tank and a drain tank, wherein the drain tank is positioned behind the flash tank, a second valve is arranged between the drain tank and the flash tank, the flash tank is communicated with a high-temperature steam condensate, a low-pressure steam pipe network and a medium-pressure steam pipe network, the drain tank is communicated with a low-pressure steam pipe network, a medium-pressure steam pipe network and a medium-pressure condensate pipe network, the low-pressure steam pipe network is connected with a low-pressure flash steam tank, the medium-pressure steam pipe network is connected with a medium-pressure flash steam tank, a fourth valve is arranged on a pipeline of the medium-pressure condensate pipe network, the steam tank is connected with a liquid level adjusting pipeline, and the liquid level adjusting pipeline is respectively communicated with the medium-pressure steam pipe network and the medium-pressure condensate pipe network. The invention adopts the modes of continuous flash evaporation and intermittent recovery, thereby not only realizing the full utilization of the energy of the steam, but also recovering the condensate. A good energy-saving effect is achieved.
Description
Technical Field
The invention relates to the technical field of condensate recovery, in particular to a high-efficiency condensate recovery device and process.
Background
The recovery of low-pressure condensate generally takes place in several ways:
(1) condensate pump
The low-pressure condensate is pressurized by a water pump and then is sent into a high-pressure condensate main pipe. The advantages are that: the method can provide the condensate according to the required pressure of the condensate, and can continuously and stably feed the condensate into the condensate mother pipe. The disadvantages are as follows: the condensate after flash evaporation is basically in a saturated water state, and when the condensate pump is used for conveying, due to the suction force of the pump, the condensate can generate a large amount of bubbles in a cavity of the pump due to micro-pressure drop. The condensate pump works in such a medium environment and cavitation may occur, resulting in a high failure rate of the condensate pump. The condensate temperature is high, the temperature change of the condensate pump is large in the using and stopping processes of the condensate pump, the sealing device of the condensate pump repeatedly expands and contracts, and the water pump is very easy to leak. Meanwhile, in the process of conveying saturated water by using the condensate pump, the efficiency of the pump is very low, and a large amount of electric energy is wasted.
(2) Power mechanical pump
Compressed air or power steam is used as the driving force of the power mechanical pump, and when the condensate amount in the power mechanical pump reaches a certain value, the compressed air or the power steam for driving drives the power mechanical pump to discharge the condensate into the condensate main pipe. The advantages are that: the power mechanical pump has small volume and is convenient to install. The disadvantages are as follows: the power mechanical pump works in a mechanical structure mode, and the mechanical structure works frequently in the water drainage process, so that the mechanical structure is easily damaged. Meanwhile, when the water is drained, the mechanical part moves quickly, so that water hammer is easily generated, and the mechanical part is easily aged and damaged. The end point of drainage of the power mechanical pump is generally closed by steam leakage, so that the drainage at the end point has a certain air leakage rate. The frequent operation of the power mechanical pump is changed, so that the air leakage rate is increased, and the energy saving is not favorable.
(3) Liquid level balance tank control
The control mode of the liquid level balancing tank is generally adopted, and an adjusting valve is arranged at the outlet of the liquid level balancing tank, so that when the liquid level reaches a certain height, the adjusting valve is opened. The condensate is discharged, and when the liquid level drops to a low level, the regulating valve is adjusted to be small or closed. The advantages are that: this way, the purpose of continuously discharging the condensate can be achieved. The disadvantages are as follows: this method requires the pressure of the condensate header to be stable due to the inability to regulate the pressure of the drain, and once the condensate header pressure becomes high, the condensate will not drain.
In the industrial production process, in order to improve the utilization rate of heat energy, the waste heat in the steam condensate needs to be fully utilized. Thus, the high-pressure condensate can be subjected to a low-pressure flash evaporation process to generate low-pressure steam for heating in process production. After the condensate is subjected to low-pressure flash evaporation, the pressure is reduced, the condensate cannot enter a condensate mother pipeline with certain pressure, and the condensate cannot be directly recovered.
Disclosure of Invention
In view of the defects in the prior art, the invention relates to a device and a process for efficiently recovering condensate, and designs a method for efficiently recovering condensate according to the problems. The utilization rate (including energy utilization and water utilization) of the steam condensate can be effectively improved. The invention adopts the modes of continuous flash evaporation and intermittent recovery, not only fully utilizes the energy of steam, but also recovers the condensate, and if the condensate is supplied to a factory or a boiler room, the condensate needs to be deoxidized, thereby preventing the safety and economic operation of the factory from being greatly influenced.
The invention relates to a condensate efficient recovery device which comprises a continuous flash evaporation part, a hydrophobic part and a condensate heat recovery part, wherein the continuous flash evaporation part keeps stable condensate input amount, the condensate after flash evaporation is fed to the hydrophobic part at the same time interval, and the condensate heat recovery part is respectively communicated with the continuous flash evaporation part and the hydrophobic part to recover heat energy.
By adopting the scheme, the heat energy utilization rate and the recovery rate of the steam condensate can be effectively improved, and the pressure of the drain tank in the drainage process is changed, so that the protective effect on the pressure-stabilizing operation of the flash tank is achieved.
Further, the continuous flash evaporation part comprises a flash tank, a PI controller connected with the side surface of the flash tank, high-temperature steam condensate communicated with the side surface of the flash tank, a condensate heat recovery part connected with the top of the flash tank and a safety valve; the drainage part comprises a drainage tank, a condensate heat recovery part communicated with the top of the drainage tank, a medium-pressure condensate pipe network communicated with the bottom of the drainage tank, and an LIC (integrated circuit) controller arranged on the side surface of the drainage tank; the condensate heat recovery part comprises a low-pressure steam pipe network communicated with the top of the flash tank and a medium-pressure steam pipe network communicated with the top of the drain tank, the low-pressure steam pipe network is communicated with the medium-pressure steam pipe network, a pipeline is communicated between the side surface of the flash tank and the side surface of the drain tank, a second valve is arranged on the pipeline, the second valve is a check valve, a fourth valve is arranged at the position, close to the drain tank, of the medium-pressure condensate pipe network, and the fourth valve is a check valve.
Through adopting above-mentioned scheme, set up the second valve between flash tank and drain pan, play the pipeline between automatic cutout and the switch-on two settings. The fourth valve can effectively prevent impact of a medium-pressure condensate pipe network, and the check valve generates action by means of self weight and medium pressure to block backflow of the medium.
Further, be provided with the liquid level control pipeline between middling pressure steam pipe network and the middling pressure lime set pipe network, be provided with first valve between middling pressure steam pipe network and the liquid level control pipeline, be provided with the third valve between middling pressure lime set pipe network and the liquid level control pipeline, the liquid level control pipeline links to each other with the LIC controller, first valve and third valve are a gate valve.
By adopting the scheme, the liquid level in the drainage tank can be displayed by the liquid level adjusting pipeline.
Furthermore, a deaerator is arranged between the connection position of the fourth valve and the bottom end of the drain tank, an oxygen-free condensate pipe network is arranged on the bottom surface of the side part of the deaerator, and the deaerator is an integrated deaerator and has double functions of deaeration and water storage.
By adopting the scheme, the integrated deaerator is provided with the arched water inlet chamber at the top of the steam space of the container, a certain number of constant-speed nozzles are arranged in the arched water inlet chamber, and condensed water is sprayed to the steam space of the water tank through the nozzles to perform spraying deaerating. The lower part of the water storage section of the deaerator is provided with a plurality of steam discharge pipes, and after heating steam is sprayed out from small holes of the discharge pipes, the primarily deaerated water storage is reheated and boiled. And the redundant gas passes out of the water surface in a bubble form and enters the space of the spraying oxygen removal section of the oxygen remover. After the water at the bottom of the water storage section is heated, the heat convection from bottom to top is carried out. When the nozzle sprays the condensed water on the water surface of the water storage section, the water firstly carries out the thermal convection of water vapor when flowing downwards, and then directly contacts and heats the water with heating steam when entering the bottom of the water storage section, so that the water at the bottom is thoroughly reboiled, the residual oxygen content in the water is removed, and the thorough deep deoxidization is carried out. After the water in the water storage section flows from bottom to top, a complete deep deoxygenation process is completed.
A process for efficiently recovering condensate comprises the following steps:
s1: boosting the pressure of the drain tank: introducing high-temperature steam condensate into a flash tank, generating low-pressure steam after flash evaporation, introducing the low-pressure flash steam into a low-pressure steam pipe network, introducing the low-pressure flash steam subjected to flash evaporation into a drain tank, slowly opening a first valve to enable medium-pressure steam to enter the drain tank when the liquid level of the condensate in the drain tank reaches a specified height, so that the pressure is increased, and automatically closing a second valve;
s2: draining the water draining tank: the third valve is slowly opened, so that the condensate which is boosted in the drainage tank is pressed into the medium-pressure condensate pipe network, the fourth valve can ensure the pressure to be stable and plays a role in protection, the counter flow is prevented, the gas in the condensate is removed through the deaerator, and the service life and the safety of the medium-pressure condensate pipe network are improved;
s3: resetting the drain tank: when the liquid level of the drain tank is reduced to a set liquid level, closing the third valve, reducing the pressure in the drain tank, automatically opening the second valve, and continuously flowing the condensate into the drain tank from the flash tank;
s4: steps S1, S2, S3 are repeated.
By using the above process, the condensate can be discharged nearly continuously into the higher pressure condensate header (so to speak, the operating conditions for the rear condensate header are less demanding). Meanwhile, because the device has few mechanical parts and no electric equipment, the device is safer and more stable in the use process, thereby achieving the final purpose of efficient dewatering.
Furthermore, the ratio of the high-pressure steam used for driving to the water transportation in the process is lower than 0.1%.
By adopting the scheme, no leakage point exists for steam, and steam leakage generated by conveying condensate is reduced. For example in the form of a power mechanical pump, which can generate steam leaks and the like during the latter stages of drainage.
Furthermore, the drain tank is linked with the first valve and the third valve through liquid level LIC and is opened and closed orderly in the draining process.
By adopting the scheme, the efficient hydrophobic process with almost zero energy consumption and zero loss is realized.
Further, the matching of the deaerator, the continuous flash of the flash tank and the intermittent recovery mode of the drain tank in the illustrated S2 make the time for the condensed water to remain in the deaerator consistent with the time interval of the continuous flash.
Through adopting above-mentioned scheme, for the traditional design of deoxidization head with the water tank, integrated oxygen-eliminating device low price has saved the weight of deoxidization head, and on-the-spot installation work load is few, only needs to transport to the scene, need not dock deoxidization head and water tank, and system control is simple.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic view of the overall connection structure of embodiment 1 of the present invention.
Fig. 2 is a schematic view of the overall connection structure of embodiment 2 of the present invention.
Reference numeral, 1, a flash tank; 11. a second valve 2 and a drain tank; 3. condensing the high-temperature steam; 4. a low pressure steam pipe network; 5. a medium pressure steam pipe network; 6. a medium-pressure condensate pipe network; 61. a fourth valve; 7. a liquid level regulating pipe; 71. a first valve; 72. a third valve; 8. a deaerator, 9 and an oxygen-free condensate pipe network.
Detailed Description
While the embodiments of the present invention will be described and illustrated in detail with reference to the accompanying drawings, it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking specific embodiments as examples with reference to the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
The embodiment 1 of the invention is shown by referring to fig. 1, and comprises a flash tank 1 and a drain tank 2, wherein a high-temperature steam condensate 3 is introduced into the flash tank 1, a pipeline into which the high-temperature steam condensate 3 enters is provided with a common valve, the flash tank 1 is also respectively connected with a PI (proportional integral), a safety valve, a low-pressure steam pipe network 4 and a medium-pressure steam pipe network 5, and the low-pressure steam pipe network 4 and the medium-pressure steam pipe network 5 are provided with gate valves. A second valve 11 is arranged between the flash tank 1 and the drain tank 2, and the second valve 11 is a check valve and is used for automatically cutting off and connecting a pipeline between the two devices. The pressure change of the drain tank 2 in the draining process plays a role in protecting the stable pressure operation of the flash tank 1. And common valves are arranged at two ends of the check valve. The check valve is directed from the flash tank 1 to the drain tank 2, and therefore the drain tank 2 is connected to the rear of the flash tank 1.
The drain tank 2 is independently arranged behind the flash tank 1 to replace an inherent water conveying system, so that the heat energy utilization rate and the recovery rate of the steam condensate can be effectively improved. The drain tank 2 is connected with medium-pressure steam pipe network 5, medium-pressure condensate pipe network 6 respectively, medium-pressure condensate pipe network 6 is connected with medium-pressure condensate storage jar, medium-pressure condensate pipe network 6 is provided with fourth valve 61 and third valve 72, fourth valve 61 and third valve 72 both sides are provided with a common valve respectively, fourth valve 61 is the check valve, can effectually prevent the impact of medium-pressure condensate pipe network 6. The third valve 72 is a gate valve, and the fourth valve 61 is directed from the drain tank 2 to the intermediate-pressure condensate storage tank. And two common valves are connected in parallel at two ends of the common valves at two sides of the third valve 72.
Be provided with first valve 71 on the middling pressure steam pipe network 5, first valve 71 is the gate valve, be provided with liquid level control pipeline 7 between first valve 71, the third valve 72, contain the LIC in the liquid level control pipeline 7. The first valve 71 and the third valve 72 are interlocked with the liquid level LIC of the drain valve 2, and are opened and closed orderly in the draining process, so that the efficient draining process with almost zero energy consumption and zero loss is realized.
The working principle and the steps of the invention are as follows:
s1: boosting the pressure of the drain tank:
introducing the high-temperature steam condensate 3 into the flash tank 1, generating low-pressure steam after flash evaporation, introducing the low-pressure flash steam into the low-pressure steam pipe network 41, introducing the low-pressure condensate after flash evaporation into the drain tank 2, slowly opening the first valve 71 to enable the medium-pressure steam to enter the drain tank 2 when the liquid level of the condensate in the drain tank 2 reaches a specified height, so that the pressure rises, automatically closing the second valve 11, isolating the drain tank 2 from the flash tank 1, and completing the boosting process of the drain tank 2.
S2: draining the water draining tank:
slowly opening third valve 72 for the condensate that steps up in the drain tank 2 is impressed middling pressure condensate pipe network 6, fourth valve 61 is used for the condensate and is impressed because middling pressure condensate pipe network 6 pressure is unstable or play the guard action when increaseing in the middling pressure condensate pipe network 6 in-process, has also prevented the refluence of condensate. The hydrophobic process of the hydrophobic tank 2 is completed.
S3: resetting the drain tank:
when the liquid level of the drain tank is reduced to the set liquid level, the third valve 72 is closed, the pressure in the drain tank 2 is reduced, the second valve 11 is automatically opened, and the condensate continuously flows into the drain tank 2 from the flash tank 1, so that the resetting process of the drain tank is completed.
S4: and repeating the steps S1, S2 and S3 to achieve the final purpose of efficient hydrophobic property.
The invention can effectively improve the utilization rate of the steam condensate, including energy utilization and water utilization. The pressure stability to the low high temperature steam condensate of front end has played fine effect, and the collection of the high temperature steam condensate of being convenient for has played fine guard action to the equipment of front end.
The ratio of the high-pressure steam to the water delivery amount for driving is less than 0.1 percent, so the ratio can be ignored. The device has no steam leakage point, reduces steam leakage generated by conveying condensate, such as the form of a power mechanical pump, and generates steam leakage in the later stage of drainage.
The condensate can be discharged nearly continuously into the higher-pressure condensate header, so to speak, with very low operating conditions for the rear-end condensate header. Meanwhile, the device has fewer mechanical parts and no electric equipment, so that the device is safer and more stable in the use process.
In the embodiment 2 of the invention, referring to fig. 2, a deaerator 8 is added on the basis of the embodiment 1, the deaerator 8 is positioned between the connection part of the fourth valve 61 and the bottom end of the drain tank 2, an oxygen-free condensate pipe network 9 is arranged on the bottom surface of the side part of the deaerator 8, and the deaerator can be used for a water supply system through the oxygen-free condensate pipe network 9, so that the safety of a power plant is improved. The deaerator 8 adopts the integrated deaerator, occupies that space is little, and the height of integrated deaerator is only for the height of former water tank, occupies that space height is about 4m less than former deaerator, can reduce the factory building height and capital construction investment.
The working principle and the steps are as follows:
s1: boosting the pressure of the drain tank: the same as S1 in example 1.
S2: draining the water draining tank: slowly open third valve 72 for the condensate that steps up in the drain tank 2 impresses medium pressure condensate pipe network 6, can guarantee through fourth valve 61 that pressure is stable and play the guard action, prevents against the current, gets rid of the gas in the condensate through oxygen-eliminating device 8, improves the life and the security of medium pressure condensate pipe network, and lets in anaerobic condensate pipe network 9 the condensate that will not contain gas and send to water supply system.
S3: resetting the drain tank: the same as S3 in example 1.
S4: the same as S4 in example 1.
The integrated deaerator 8 has the dual functions of deaerating and storing water in an independent container. An arched water inlet chamber is arranged at the top of the steam space of the container, a certain number of constant-speed nozzles are arranged in the arched water inlet chamber, and condensed water is sprayed to the steam space of the water tank through the nozzles to perform spraying and deoxygenation. The lower part of the water storage section of the deaerator is provided with a plurality of steam discharge pipes, and after heating steam is sprayed out from small holes of the discharge pipes, the primarily deaerated water storage is reheated and boiled. And the redundant gas passes out of the water surface in a bubble form and enters the space of the spraying oxygen removal section of the oxygen remover. After the water at the bottom of the water storage section is heated, the heat convection from bottom to top is carried out. When the nozzle sprays the condensed water on the water surface of the water storage section, the water firstly carries out the thermal convection of water vapor when flowing downwards, and then directly contacts and heats the water with heating steam when entering the bottom of the water storage section, so that the water at the bottom is thoroughly reboiled, the residual oxygen content in the water is removed, and the thorough deep deoxidization is carried out. After the water in the water storage section flows from bottom to top, a complete deep deoxygenation process is completed.
The upper layer in the flash tank 1 in the embodiments 1 and 2 of the present invention may be further provided with a demister, and when the gas with mist rises through the demister at a certain speed, the mist collides with the wire mesh filaments and is attached to the filament surfaces of the demister due to the inertia of the rising mist. The dispersion of the mist on the surface of the filament and the gravity sedimentation of the mist enable the mist to form larger liquid drops and flow to the junction of the two filaments along the filament. The wettability of the filament, the surface tension of the liquid and the capillary action of the filament make the droplet larger and larger until the droplet is so large that the resultant force of the rising force of the gas and the surface tension of the liquid is exceeded by the gravity generated by the droplet itself, and the droplet separates from the filament and falls. After passing through the demister screen, the gas is substantially free of mist. The mist in the gas is separated to improve the operation condition, optimize the process index, reduce the corrosion of equipment, prolong the service life of the equipment, increase the treatment capacity, recover valuable materials, protect the environment, reduce the atmospheric pollution and the like, the foam removing net has the collection efficiency of 98-99.8 percent for the mist with the particle size of more than or equal to 3-5 um, the pressure drop of the gas passing through the foam remover is only 250-500Pa, and the improvement of the production efficiency of the equipment is facilitated.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a high-efficient recovery unit of condensate which characterized in that: the continuous flash evaporation system comprises a continuous flash evaporation part, a hydrophobic part and a condensate heat recovery part, wherein the continuous flash evaporation part keeps stable condensate input, the condensate after flash evaporation is passed through the hydrophobic part at the same time interval, and the condensate heat recovery part is respectively communicated with the continuous flash evaporation part and the hydrophobic part to recover heat energy.
2. The apparatus for recovering condensate with high efficiency as claimed in claim 1, wherein: the continuous flash evaporation part comprises a flash evaporation tank, a PI controller connected with the side surface of the flash evaporation tank, high-temperature steam condensate communicated with the side surface of the flash evaporation tank, a condensate heat recovery part connected with the top of the flash evaporation tank and a safety valve; the drainage part comprises a drainage tank, a condensate heat recovery part communicated with the top of the drainage tank, a medium-pressure condensate pipe network communicated with the bottom of the drainage tank, and an LIC (integrated circuit) controller arranged on the side surface of the drainage tank; the condensate heat recovery part comprises a low-pressure steam pipe network communicated with the top of the flash tank and a medium-pressure steam pipe network communicated with the top of the drain tank, the low-pressure steam pipe network is communicated with the medium-pressure steam pipe network, a pipeline is communicated between the side surface of the flash tank and the side surface of the drain tank, a second valve is arranged on the pipeline, the second valve is a check valve, a fourth valve is arranged at the position, close to the drain tank, of the medium-pressure condensate pipe network, and the fourth valve is a check valve.
3. The apparatus for recovering condensate with high efficiency as claimed in claim 2, wherein: be provided with the liquid level control pipeline between middling pressure steam pipe network and the middling pressure lime set pipe network, be provided with first valve between middling pressure steam pipe network and the liquid level control pipeline, be provided with the third valve between middling pressure lime set pipe network and the liquid level control pipeline, the liquid level control pipeline links to each other with the LIC controller, first valve is a gate valve with the third valve.
4. A condensate high efficiency recovery apparatus as claimed in claim 3, wherein: and a deaerator is arranged between the connection part of the fourth valve and the bottom end of the drain tank, an oxygen-free condensate pipe network is arranged on the bottom surface of the side part of the deaerator, and the deaerator is an integrated deaerator and has dual functions of deaeration and water storage.
5. A high-efficiency condensate recovery process uses any one condensate high-efficiency recovery device from 1 to 4, and is characterized in that: the method comprises the following steps:
s1: boosting the pressure of the drain tank:
introducing high-temperature steam condensate into a flash tank, generating low-pressure steam after flash evaporation, introducing the low-pressure flash steam into a low-pressure steam pipe network, introducing the low-pressure flash steam subjected to flash evaporation into a drain tank, slowly opening a first valve to enable medium-pressure steam to enter the drain tank when the liquid level of the condensate in the drain tank reaches a specified height, so that the pressure is increased, and automatically closing a second valve;
s2: draining the water draining tank:
the third valve is slowly opened, so that the condensate which is boosted in the drainage tank is pressed into the medium-pressure condensate pipe network, the fourth valve can ensure the pressure to be stable and plays a role in protection, the counter flow is prevented, the gas in the condensate is removed through the deaerator, and the service life and the safety of the medium-pressure condensate pipe network are improved;
s3: resetting the drain tank:
when the liquid level of the drain tank is reduced to a set liquid level, closing the third valve, reducing the pressure in the drain tank, automatically opening the second valve, and continuously flowing the condensate into the drain tank from the flash tank;
s4: steps S1, S2, S3 are repeated.
6. The process for efficiently recycling condensate according to claim 5, wherein: the ratio of the high-pressure steam used for driving to the water delivery in the process is lower than 0.1%.
7. The process for efficiently recycling condensate as claimed in claim 6, wherein: the drain tank is interlocked with the first valve and the third valve, and is opened and closed orderly in the draining process.
8. The process for efficiently recycling condensate according to claim 5, wherein: and the matching of the deaerator, the continuous flash evaporation of the flash tank and the intermittent recovery mode of the drain tank in the S2 enables the time of the condensate water remaining in the deaerator to be consistent with the continuous flash evaporation time interval.
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| CN101251248A (en) * | 2007-12-28 | 2008-08-27 | 蓝星化工新材料股份有限公司无锡树脂厂 | Method for improving bisphenol A device steam system exchanging/accompanying heat |
| CN105366750A (en) * | 2015-12-04 | 2016-03-02 | 淮安万邦香料工业有限公司 | Steam grading system |
| CN106765005A (en) * | 2017-02-21 | 2017-05-31 | 安阳永金化工有限公司 | A kind of coal-ethylene glycol steam condensate heat recycling system and method |
| CN209639553U (en) * | 2019-02-21 | 2019-11-15 | 湖北甘宁石化新材料股份有限公司 | A kind of recycling of steam condensed water waste heat and cascade utilization device |
| CN212430810U (en) * | 2019-11-26 | 2021-01-29 | 茅台学院 | Step recovery device for steam condensate of butanone device |
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2021
- 2021-03-04 CN CN202110240232.4A patent/CN113154352B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251248A (en) * | 2007-12-28 | 2008-08-27 | 蓝星化工新材料股份有限公司无锡树脂厂 | Method for improving bisphenol A device steam system exchanging/accompanying heat |
| CN105366750A (en) * | 2015-12-04 | 2016-03-02 | 淮安万邦香料工业有限公司 | Steam grading system |
| CN106765005A (en) * | 2017-02-21 | 2017-05-31 | 安阳永金化工有限公司 | A kind of coal-ethylene glycol steam condensate heat recycling system and method |
| CN209639553U (en) * | 2019-02-21 | 2019-11-15 | 湖北甘宁石化新材料股份有限公司 | A kind of recycling of steam condensed water waste heat and cascade utilization device |
| CN212430810U (en) * | 2019-11-26 | 2021-01-29 | 茅台学院 | Step recovery device for steam condensate of butanone device |
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