CN120800012A - Steam condensate recovery unit - Google Patents
Steam condensate recovery unitInfo
- Publication number
- CN120800012A CN120800012A CN202511251526.1A CN202511251526A CN120800012A CN 120800012 A CN120800012 A CN 120800012A CN 202511251526 A CN202511251526 A CN 202511251526A CN 120800012 A CN120800012 A CN 120800012A
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- cold water
- heat exchange
- water pipe
- storage tank
- condensate
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Abstract
The invention relates to the technical field of condensate recovery, in particular to a steam condensate recovery device, which comprises a storage tank for storing condensate, an input unit for supplying condensate into the storage tank and a heat exchange structure which is positioned in the storage tank and used for heat exchange, wherein the heat exchange structure comprises a cold water pipe and an outer sleeve sleeved on the outer side of the cold water pipe, the cold water pipe is used for conveying cold water, the cold water pipe is communicated with the outer sleeve through a plurality of ports formed in the cold water pipe, flash steam is produced in a continuous flash evaporation mode, continuous recovery treatment work of the condensate can be realized, and because the condensate is only converted into the flash steam, latent heat of the flash steam can be effectively released, energy recovery rate is improved, and equipment such as matched conveying and treatment is not needed to be provided for the residual condensate, so that the structure mode is greatly simplified, and cost investment is reduced.
Description
Technical Field
The invention relates to the technical field of condensate recovery, in particular to a steam condensate recovery device.
Background
The steam system is widely applied to industries such as electric power, chemical industry, pharmacy, food processing and the like, is an important energy carrier in industrial production, and can be condensed into liquid condensate after releasing heat in the steam use process, and the condensate still has higher pressure and temperature, if the condensate is directly discharged, a large amount of energy loss can be caused, and high-temperature hazard can be brought to the environment, so that the steam system is an important aspect of modern energy optimization and utilization for recycling and utilization of the condensate.
The traditional condensate recovery mode is to generate low-pressure steam and residual condensate by utilizing a flash evaporation method, the low-pressure steam can be used for preheating, heat exchange, low-temperature drying and the like, the residual condensate is continuously recovered to a boiler for recycling, the latent heat in the condensate can be released due to the flash evaporation, the latent heat of the residual condensate cannot be released due to the fact that the temperature and the pressure are too low, energy in the residual condensate cannot be effectively released and recovered, energy waste is easily caused, and the use, the conveying and the treatment of the residual condensate can increase operation cost of a plurality of matched equipment such as a conveying pump, water quality detection equipment, filtering equipment and the like.
Disclosure of Invention
The invention provides a steam condensate recovery device which can effectively solve the problems in the background technology.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
A vapor condensate recovery apparatus comprising a storage tank for storing condensate, an input unit for supplying condensate into the storage tank, and a heat exchange structure located within the storage tank for performing heat exchange;
The heat exchange structure comprises a cold water pipe and an outer sleeve sleeved on the outer side of the cold water pipe, the cold water pipe is used for conveying cold water, the cold water pipe is communicated with the outer sleeve through a plurality of through holes formed in the cold water pipe, a flash valve for controlling fluid in the storage tank to enter the outer sleeve is arranged on the outer sleeve, and a water suction pump is arranged at the output end of the outer sleeve.
In some embodiments of the present invention, the heat exchange structure further includes a plurality of heat exchange fin groups and a second multi-way pipe, wherein the plurality of output ends of the second multi-way pipe are respectively communicated with the input ends of the plurality of heat exchange fin groups, the output ends of the plurality of heat exchange fin groups are respectively communicated with the cold water pipe, and the input end of the second multi-way pipe is used for cold water to enter.
In some embodiments of the present invention, the input end of the second multi-way pipe is provided with a pressure valve, and the pressure valve is matched with the flash valve for use.
In some embodiments of the invention, the flash valve is continuously vented or intermittently vented.
In some embodiments of the present invention, the heat exchange plate set includes a converging area, a heat exchange area and a drainage diffusion area, wherein the converging area is communicated with the cold water pipe, the heat exchange area is composed of a plurality of vertical parts which are transversely arranged in sequence and a transition part for connecting two adjacent vertical parts, the transition part is provided with a plurality of water holes, the water holes are mutually isolated from the inside of the heat exchange plate set, and the drainage diffusion area is communicated with one output end of the two multi-way pipes.
In some embodiments of the invention, the horizontal cross-sectional shape of the vertical portion is a profile for increasing the contact area.
In some embodiments of the present invention, the outer sleeve is formed of a plurality of staggered guide surfaces for guiding the fluid toward the outer wall of the cold water pipe and outer concave surfaces for receiving and guiding a portion of the fluid reflected by the outer wall of the cold water pipe.
In some embodiments of the present invention, the inner and outer walls of the cold water pipe are provided with a plurality of heat exchange grooves.
In some embodiments of the invention, a secondary chamber for accommodating the flash valve is arranged at the top of the storage tank, an expansion chamber is further arranged in the secondary chamber, and the flash valve is communicated with the outer sleeve through the expansion chamber.
In some embodiments of the present invention, the top of the expansion chamber passes through the auxiliary chamber and extends outwards, the top of the expansion chamber is opened, a piston is slidably arranged in the expansion chamber, the piston is connected with the expansion chamber through an elastomer, and the piston and the elastomer are used for buffering the air pressure in the expansion chamber.
By the technical scheme of the invention, the following technical effects can be realized:
The continuous recovery treatment of the condensate can be realized by adopting a continuous flash evaporation mode to produce flash evaporation steam, and the condensate is only converted into flash evaporation steam, so that the latent heat of the condensate can be effectively released, the energy recovery rate is improved, and equipment such as matched conveying, treatment and the like is not required to be provided for the residual condensate, so that the structural mode is greatly simplified, the cost input is reduced, the gradual heating mode of cold water can be realized by adopting the mode that the flash evaporation steam is subjected to heat exchange first and then is directly mixed into the cold water, the equipment is conveniently protected, the equipment damage caused by overlarge temperature difference variation is avoided, and meanwhile, the cold water can be directly utilized to absorb the steam, so that the cost input of independently setting a matched structure for the recovery operation of the steam is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a storage tank from another perspective in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a heat exchange structure according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of FIG. 3;
FIG. 5 is a schematic cross-sectional view of an outer sleeve according to an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of the vertical portion on the heat exchange zone in an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of an expansion chamber according to an embodiment of the invention.
Reference numerals:
100. a storage tank; 101, a control valve, 102, a collection box;
200. An input unit; 201, drainage grooves, 202, an input pump, 203, a multi-way pipe I;
300. the heat exchange structure comprises a heat exchange structure, a cold water pipe, a 302, an outer sleeve, a 303, a through hole, a 304, a flash valve, a 305, a water pump, a 306, a heat exchange plate group, a 307, a two-way pipe, a 308, a pressure valve, a 309, a water hole, a 310, a guide surface, a 311, an outer concave surface, a 312, a heat exchange groove, a 313, a confluence area, a 314, a heat exchange area, a 315, a drainage diffusion area, a 316, an auxiliary chamber, a 317, an expansion chamber, a 318, a piston, a 319 and an elastomer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 7, a vapor condensate recovery apparatus of the present invention includes a storage tank 100 for storing condensate, an input unit 200 for supplying condensate into the storage tank 100, and a heat exchange structure 300 located in the storage tank 100 and for performing heat exchange;
The heat exchange structure 300 comprises a cold water pipe 301 and an outer sleeve 302 sleeved outside the cold water pipe 301, wherein the cold water pipe 301 is used for conveying cold water, the cold water pipe 301 is communicated with the outer sleeve 302 through a plurality of through holes 303 formed in the cold water pipe 301, a flash valve 304 for controlling fluid in the storage tank 100 to enter the outer sleeve 302 is arranged on the outer sleeve 302, and a water suction pump 305 is arranged at the output end of the outer sleeve 302;
In the invention, the input unit 200 can convey the steam condensate generated by the boiler or other equipment into the storage tank 100, in the process, the input unit 200 can pressurize the condensate or only carry out conveying work, namely, according to the pressure of the condensate in the storage tank 100, the conveying pressure of the input unit 200 can be actively regulated, of course, a controller or other structures can be arranged in a matching way, if the pressure of the condensate output by the boiler or other equipment is higher, the input unit 200 can not be arranged or the energy can be reversely recovered by utilizing the action of the condensate on the input unit 200, the storage tank 100 is mainly used for storing the condensate in a high-temperature and high-pressure state, thus, a high-pressure environment can be provided for the subsequent flash evaporation work, the liquid level in the storage tank 100 is in a specified range, the heat exchange structure 300 is mainly used for carrying out heat exchange movement on both steam and cold water, the cold water is mainly used for supplementing a water source into the boiler, and the steam is flash evaporation steam, and the cold water is subjected to heat treatment through the heat exchange structure 300, so that energy is recovered;
When the cold water pump is used, the water suction pump 305 actively pumps cold water, so that a negative pressure water pumping environment is formed in the cold water pipe 301, the inside of the outer sleeve 302 is a negative pressure environment due to the arrangement of the flash valve 304, in an initial state, water in the cold water pipe 301 cannot flow into the outer sleeve 302 through the through hole 303, the input unit 200 leads high-temperature and high-pressure condensate into the storage tank 100, the inside of the outer sleeve 302 is in a high-pressure environment due to the fact that the inside of the outer sleeve 302 is in the negative pressure environment, so that as the condensate in the storage tank 100 increases and the pressure continuously increases, steam on the upper side in the storage tank 100 enters the outer sleeve 302 through the flash valve 304, namely, pressure relief work is realized, at the moment, the liquid level of the condensate in the storage tank 100 gradually drops, the condensate is flashed and new steam is formed, latent heat in the condensate is released rapidly, the cold water pipe 301 is used for heating the cold water, cold water in the outer sleeve 302 is subjected to heat exchange treatment by the cold water, and as the continuous introduction of the steam, the steam in the outer sleeve 302 flows along the length direction of the outer sleeve 302 and moves to the position of the through hole 303, the steam can directly enter the through hole 303, the heat exchange steam, the cold water pipe is directly absorbed by the water pipe 301, and the heat is directly, and the cold water is directly absorbed by the cold water in the water through the water pipe, and the heat pump, thus the heat is directly, and the cold water is directly absorbed by the water, and the heat steam is directly and the cold water in the water pump, and the water is directly treated; since condensate may be continuously introduced into the storage tank 100 through the input unit 200, a flash phenomenon may continuously occur within the outer jacket 302, whereby flash steam may be continuously generated;
In actual use, a small amount of water in the cold water pipe 301 is allowed to flow into the outer sleeve 302 through the through hole 303, and when steam in the outer sleeve 302 continuously flows into the cold water pipe 301 through the through hole 303, the flow of the steam can block the water in the cold water pipe 301 from flowing into the outer sleeve 302; the top of the cold water pipe 301 can extend out of the storage tank 100, the water suction pump 305 is arranged outside the storage tank 100 and is communicated with the cold water pipe 301, the outer sleeve 302 is positioned in the storage tank 100, the outer sleeve 302 and the cold water pipe 301 are vertically arranged, the flash valve 304 is arranged at the top of the outer sleeve 302, and the through hole 303 is formed in the side wall of the cold water pipe 301 at the lower side of the inner part of the outer sleeve 302;
The continuous recovery treatment of the condensate can be realized by adopting a continuous flash evaporation mode to produce flash evaporation steam, and the condensate is only converted into flash evaporation steam, so that the latent heat of the condensate can be effectively released, the energy recovery rate is improved, and equipment such as matched conveying, treatment and the like is not required to be provided for the residual condensate, so that the structural mode is greatly simplified, and the cost input is reduced;
It should be noted that, since the flash evaporation steam is only generated inside the storage tank 100, the condensate in the storage tank 100 does not need to be filtered, impurities in the condensate can be directly sunk, the collection of impurities can be realized by means of the control valve 101 and the collecting tank 102 installed at the bottom of the storage tank 100, of course, some floating impurities can be settled and cleaned by periodically adding flocculant, the bottom of the storage tank 100 can be tapered for convenience of impurity recovery, the input unit 200 can be a plurality of drainage tanks 201, an input pump 202 and a multi-way pipe one 203, the input end of the input pump 202 is connected with the condensate discharge port of the boiler, the input pump 202 guides the condensate into the plurality of drainage tanks 201 through the multi-way pipe one 203, the condensate is continuously supplemented into the storage tank 100 by utilizing the communication of the drainage tanks 201 and the storage tank 100, and in some embodiments, the drainage tanks 201 can be obliquely discharged into the storage tank 100 by utilizing the inclination of the drainage tanks 201, so that the aggregation and settlement of impurities in the storage tank 100 can be assisted by utilizing the flow of the condensate.
Because the condensate stored in the storage tank 100 is in a high-temperature and high-pressure state, the sensible heat temperature of the condensate is higher, in order to achieve the aim of recovering the sensible heat, a mode of additionally arranging a group of heat exchange structures in the storage tank 100 can be adopted, specifically, as shown in fig. 3, the heat exchange structure 300 further comprises a plurality of heat exchange plate groups 306 and a plurality of heat exchange plate groups 307 which are positioned in the storage tank 100, a plurality of output ends of the heat exchange plate groups 307 are respectively communicated with the input ends of the heat exchange plate groups 306, the output ends of the heat exchange plate groups 306 are communicated with the cold water pipe 301, the input ends of the heat exchange plate groups 307 are used for supplying cold water, each output end of the heat exchange plate groups 306 are arranged on the heat exchange plate groups 307, the distribution form of the heat exchange plate groups 306 in the storage tank 100 can be in a linear arrangement, a square matrix or an annular arrangement mode, and the like, and the cold water can enter the heat exchange plate groups 306 from the input ends of the heat exchange plate groups 307 and be led into the heat exchange plate groups 307, the condensate in the storage tank 100 can be directly contacted with the heat exchange plate groups 306, thereby the cold water in the heat exchange plate groups 306 is heated, the cold water in the storage tank 100 is directly, the high-temperature and the high-pressure condensate is directly subjected to heat exchange water and the cold water flow in the heat pipe 301, and the sensible heat recovery efficiency is improved, and the heat recovery efficiency is achieved, and the sensible heat recovery efficiency is achieved.
When the flash evaporation operation is continuously carried out in the storage tank 100, in order to ensure that the pressure difference at two sides of the flash evaporation valve 304 is always in a specified range, and avoid that the pressure change of condensate in the storage tank 100 affects the normal flash evaporation operation, the pressure of cold water entering the two multi-way pipe 307 can be regulated, namely the negative pressure in the cold water pipe 301 is regulated, specifically, as shown in fig. 2, the input end of the two multi-way pipe 307 is provided with a pressure valve 308, the pressure valve 308 is matched with the flash evaporation valve 304 for use, the pressure valve 308 regulates the cold water inlet pressure, and the pumping pressure of the water pump 305 can be set to be a constant value, so that the regulation operation of the pressure in the cold water pipe 301 and the external sleeve 302 can be realized by the regulation mode, and the pressure difference at two sides of the flash evaporation valve 304 is always in the specified range;
In some embodiments, the pressure differential across the flash valve 304 may also be adjusted by adjusting it.
When the flash evaporation works, the flash evaporation can be in a continuous or intermittent working mode, namely the flash evaporation valve 304 is used for continuously exhausting or intermittently exhausting, the flash evaporation mode of continuous exhausting can require the pressure difference to be always maintained in a certain range, the intermittent flash evaporation exhausting mode can enable the pressure difference to periodically fluctuate, the fluctuation can enable the pressure difference to be in a higher range when the flash evaporation starts, the pressure difference can be reduced along with the continuous exhausting work of the flash evaporation in one period, then the exhaust is stopped, the pressure difference is increased again, and therefore the energy released by latent heat can be improved, and the flash evaporation valve 304 can directly adopt an aeration valve or a pressure regulating valve or a valve structure with combined functions.
As shown in fig. 3, the heat exchange plate set 306 includes a converging area 313, a heat exchange area 314 and a drainage diffusion area 315 which are sequentially communicated, the converging area 313 is communicated with the cold water pipe 301, the heat exchange area 314 is composed of a plurality of vertical parts which are transversely and sequentially arranged and a transition part for connecting two adjacent vertical parts, a plurality of water holes 309 are formed in the transition part, the water holes 309 are mutually isolated from the inside of the heat exchange plate set 306, and the drainage diffusion area 315 is communicated with one output end of the two multi-way pipe 307;
In the present invention, several vertical parts are sequentially arranged, and the transition part can connect two adjacent vertical parts, so that the overall shape of the heat exchange area 314 can be S-shaped as shown in fig. 3, and of course, the combination of several vertical parts and the transition part can also be arranged in various manners such as ring shape, matrix shape, etc. in three-dimensional space, so long as the heat exchange effect can be achieved, the shape of the transition part can be any shape such as arc shape, linear shape, conical shape, etc., the arrangement of the drainage diffusion area 315 mainly makes the connection position between the drainage diffusion area and one output end of the two multi-way pipe 307 form a flat long opening, thereby facilitating the even introduction of cold water into the heat exchange area 314, avoiding the aggregation of cold water and the uneven heat exchange, and the confluence area 313 is mainly used for connecting the heat exchange area 314 and the cold water pipe 301, so that the cold water subjected to the heat exchange of the heat exchange area 314 directly flows into the cold water pipe 301.
In order to further improve the heat exchange effect of the heat exchange area 314, the horizontal cross section of the vertical portion is shaped like a special shape for increasing the contact area, and the special shape mentioned here is a wave shape as shown in fig. 6, or may be any shape such as a bow shape arranged in sequence, so long as the contact area can be increased, which is within the scope of protection of the present disclosure.
As shown in fig. 5, the outer sleeve 302 is composed of a plurality of guiding surfaces 310 and outer concave surfaces 311, wherein the guiding surfaces 310 are used for guiding the fluid to flow towards the outer wall of the cold water pipe 301, and the outer concave surfaces 311 are used for receiving and guiding part of the fluid reflected by the outer wall of the cold water pipe 301;
The outer sleeve 302 is generally in a straight cylindrical shape, when steam flows downwards in the outer sleeve 302, the temperature of part of steam close to the outer wall of the cold water pipe 301 is relatively low, and the temperature of part of steam far away from the outer wall of the cold water pipe 301 is relatively high, so that the heat exchange of the steam in the outer sleeve 302 is uneven, in order to avoid the phenomenon, a structure as shown in fig. 5, namely, the shape of the outer sleeve 302 is specially set, when the steam continuously passes through each guide surface 310, each guide surface 310 can guide the steam to flow towards the outer wall of the cold water pipe 301, the steam reflected by the outer wall of the cold water pipe 301 enters the outer concave 311 and continuously flows downwards, and the guide surfaces 310 adjacent to the outer concave 311 guide the steam again, so that the steam in the outer sleeve 302 flows downwards in a transverse reciprocating manner, is convenient to make the steam contact with the outer wall of the cold water pipe 301 comprehensively and uniformly, and the temperature of the steam in the cold water pipe 301 is ensured to be uniform.
When the steam in the outer sleeve 302 contacts with the outer wall of the cold water pipe 301, as shown in fig. 5, a plurality of heat exchange grooves 312 are formed in the inner wall and the outer wall of the cold water pipe 301 to increase heat exchange efficiency, so that the contact area between the cold water pipe 301 and cold water and steam can be increased, and further heat exchange efficiency is improved, in order to avoid the influence of the arrangement of the heat exchange grooves 312 on the fluid flow, the heat exchange grooves 312 can be arranged in a spiral shape, and the head end and the tail end of the spiral shape extend to the outer wall surface or the inner wall surface of the cold water pipe 301, so that the heat exchange grooves 312 can increase the contact area, and the fluid can flow towards the inner wall of the outer sleeve 302 or the middle of the cold water pipe 301 under the guiding action of the heat exchange grooves 312, so as to realize the self-mixing effect of the fluid.
As shown in fig. 2 and 7, the top of the storage tank 100 is provided with an auxiliary chamber 316 for accommodating the flash valve 304, an expansion chamber 317 is further provided in the auxiliary chamber 316, the flash valve 304 is communicated with the outer sleeve 302 through the expansion chamber 317, the expansion chamber 317 can provide a larger storage space for the steam after flash evaporation, thereby facilitating the large-area diffusion and release of the steam, avoiding the crowding of the steam and affecting the flash evaporation effect, the auxiliary chamber 316 can provide an installation space for the flash valve 304, and thus, the flash valve 304 is far away from the condensate in the storage tank 100, avoiding the condensate from directly entering the expansion chamber 317 through the flash valve 304, and meanwhile, the valve rod of the flash valve 304 can extend to the outer side of the auxiliary chamber 316, thereby facilitating the direct operation of the flash valve 304 by a worker.
Based on the above implementation, as shown in fig. 7, the top of the expansion chamber 317 passes through the auxiliary chamber 316 and extends outwards, the top of the expansion chamber 317 is opened, a piston 318 is slidably disposed in the expansion chamber 317, the piston 318 is connected with the expansion chamber 317 through an elastic body 319, the piston 318 is used for buffering the air pressure in the expansion chamber 317, the auxiliary chamber 316 and the expansion chamber 317 can be connected together through welding, the opening at the top of the expansion chamber 317 can allow the piston 318 to move up and down, the elastic body 319 can provide elastic force for the piston 318, so that when the pressure in the storage tank 100 fluctuates, the steam discharged into the expansion chamber 317 also fluctuates, and at the moment, the pressure fluctuation pushes the piston 318 to move, and the elastic body 319 deforms elastically, thereby realizing the pressure stabilizing effect and facilitating the stable flow of the steam.
The foregoing has outlined and described the basic principles, features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511251526.1A CN120800012B (en) | 2025-09-03 | A steam condensate recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511251526.1A CN120800012B (en) | 2025-09-03 | A steam condensate recovery device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN120800012A true CN120800012A (en) | 2025-10-17 |
| CN120800012B CN120800012B (en) | 2025-12-23 |
Family
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