CN112963823A - Steam heat recovery system - Google Patents
Steam heat recovery system Download PDFInfo
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- CN112963823A CN112963823A CN202110365073.0A CN202110365073A CN112963823A CN 112963823 A CN112963823 A CN 112963823A CN 202110365073 A CN202110365073 A CN 202110365073A CN 112963823 A CN112963823 A CN 112963823A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a steam heat energy recovery system, which belongs to the technical field of industrial energy conservation and solves the problems that the existing steam recovery system in the prior art is poor in recovery utilization rate, single in recycling direction, large in heat loss and easy to cause waste of steam resources; the steam condensing device comprises a heat exchanger for condensing steam, wherein a high-temperature steam inlet of the heat exchanger is connected with production equipment through a steam pipeline, and a steam compressor is arranged on the steam pipeline; the soft water tank is connected with the heat exchanger through a high-temperature water pipe, and a steam mixer is arranged on the high-temperature water pipe; the water inlet of the steam boiler is connected with the soft water tank through a pipeline, the steam outlet of the steam boiler is communicated with the production equipment through a steam circulating pipeline, the used steam is recovered, the heat energy in the steam boiler is reused in the production process, the energy loss is reduced, and the recovery utilization rate of the steam is improved.
Description
In the technical field of
The invention belongs to the technical field of industrial energy conservation, and particularly relates to a steam heat energy recovery system.
Background
In the oil industry production, because steam has pollution-free, and the heating effect is stable, the mode of high temperature steam heating is selected to most production equipment, but used steam often directly gets rid of in the middle of the air, and used steam still often has very huge heat energy, directly gets rid of in the air, can cause the waste of a large amount of heat energy on the one hand, still can aggravate global warming effect simultaneously. How to recycle the redundant large amount of steam in the grease production industry becomes a technical problem to be solved urgently by the technical personnel in the field.
The existing steam recovery system in the current market often has the problems of poor recovery rate, single recycling direction, large heat loss and easy steam resource waste.
Disclosure of Invention
In order to solve the technical problem, the invention provides a steam heat energy recovery system. The steam recycling device aims to recycle used steam, reuse heat energy in the steam in the production process, reduce energy loss and improve the recycling rate of the steam.
The technical scheme adopted by the invention is as follows:
a steam heat recovery system, comprising:
production equipment using steam as a heat source; the steam condensing device comprises a heat exchanger for condensing steam, wherein a high-temperature steam inlet of the heat exchanger is connected with production equipment through a steam pipeline, and a steam compressor is arranged on the steam pipeline; the soft water tank is connected with the heat exchanger through a high-temperature water pipe, and a steam mixer is arranged on the high-temperature water pipe; the water inlet of the steam boiler is connected with the soft water tank through a pipeline, and the steam outlet of the steam boiler is communicated with the production equipment through a steam circulating pipeline.
Furthermore, the high-temperature water pipe comprises a first high-temperature water pipe, a second high-temperature water pipe and a third high-temperature water pipe, one end of each of the first high-temperature water pipe and the second high-temperature water pipe is connected to the heat exchanger, and the other end of each of the first high-temperature water pipe and the second high-temperature water pipe is communicated with the third high-temperature water pipe through a three-way pipe.
Further, steam mixer is provided with first delivery port and second delivery port, first delivery port loops through second high temperature water pipe and third high temperature water pipe and softened water tank intercommunication, be provided with out water pump and valve an on the third high temperature water pipe, the second delivery port passes through circulating pipe intercommunication with production facility, last circulating water pump and the valve b of being provided with of circulating pipe, steam mixer lower part still is provided with hot water steam inlet, and hot water steam inlet passes through the second high temperature water pipe and is connected with the heat exchanger delivery port, is provided with valve e on the second high temperature water pipe between steam mixer and the heat exchanger.
Furthermore, a valve d is arranged on the steam circulating pipeline.
Preferably, the vapor compressor is a reciprocating compressor or a centrifugal compressor.
Furthermore, still be connected with the cooling water inlet tube on the heat exchanger, be provided with cooling water pump on the cooling water inlet tube, be provided with valve c on the first high temperature water pipe.
By adopting the technical scheme, the heat exchanger is connected with the production equipment, the secondary steam generated by the production equipment is condensed and cooled into hot water with the temperature of 70 ℃ by cooling water, the conversion rate of the condensed hot water in the heat exchanger of the high-temperature steam is not 100 percent, so a steam mixer is arranged on the second high-temperature water pipe, the low-temperature steam and the hot water are mixed and then enter the steam mixer from the hot water steam inlet at the lower part of the steam mixer through the second high-temperature water pipe, the low-temperature steam is fully mixed with the hot water in the steam mixer and then is converted into liquid water, one part of the hot water in the steam mixer is connected with the production equipment through a circulating water pipe, the production equipment converts the hot water into steam and then enters a steam circulating pipeline for circulation, the other part of the hot water enters a steam boiler through a water outlet pump and a soft water tank for reutilization, and, the steam boiler heats the warm water into first-stage steam, and the first-stage steam enters the production equipment for reutilization.
Preferably, the heat exchanger comprises a tank body, a spiral condensing pipe is arranged in the tank body, one end of a steam pipe is connected with a steam pipeline, the other end of the steam pipe is connected with a second high-temperature water pipe, a cooling water inlet is further formed in the lower portion of the tank body and is communicated with a cooling water inlet pipe, a cooling water outlet is further formed in the upper portion of the tank body and is communicated with a first high-temperature water pipe. By adopting the optimized technical scheme, the heat exchanger is externally connected with a cooling water pipe, and after low-temperature cooling water in the cooling water pipe absorbs heat in a steam pipe, the temperature rises to become hot water, and the hot water enters the steam boiler through the first high-temperature water pipe and the third high-temperature water pipe for reutilization.
Preferably, a metal heat sink is fixedly connected to a spiral portion of the steam pipe. By adopting the preferred technical scheme, the metal radiating fins are arranged on the steam pipe, because metal has good heat conductivity, heat in the steam pipe can be quickly transmitted to the metal fins, the contact area between the metal radiating fins and cooling water in the tank body is large, the heat can be quickly transmitted to the cooling water in the condensing tank, and the heat exchange efficiency is improved.
Preferably, the heat exchanger still includes temperature-sensing ware, controller and alarm device, the temperature-sensing ware sets up in the tank body and is connected with controller and alarm device, and the controller is connected with valve c and valve e, alarm device includes bee calling organ and LED light alarm. Adopt this preferred technical scheme, can make the judgement to the temperature in the condensation jar through controller and temperature-sensing ware to this control flap c and valve e, and then the temperature of control steam pipe exit reaches, and when breaking down, during the jar internal temperature was too high and not traded water, alarm device can sound, reminds the staff to overhaul.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. through setting up heat exchanger and production facility and being connected, the high-temperature steam that produces the production facility, through cooling water condensation cooling become 70 degrees hot water and partly low-temperature steam, low-temperature steam passes through the steam mixer and the hot water intensive mixing converts into liquid, partly hot water passes through circulating pipe and production facility connection in the steam mixer, realize the first utilization of steam heat energy, another part hot water gets into in the steam boiler through a water pump and a soft water tank, the effectual steam boiler that has reduced heats water into the heat energy that steam needs, steam boiler heats warm water into steam and gets into production facility recycle through steam circulation pipeline, realize the second utilization of steam heat energy.
2. The heat exchanger is externally connected with a cooling water pipe, low-temperature cooling water in the cooling water pipe absorbs heat in a steam pipe, the temperature rises to become hot water, the hot water enters the steam boiler through the first high-temperature water pipe and the third high-temperature water pipe to be recycled, and the cooling water is heated up to be used in the steam boiler through heat exchange, so that the third utilization of steam heat energy is realized.
3. Through set up the metal fin on the steam pipe, because the metal has good heat conductivity, the heat in the steam pipe can transmit to the metal fin fast, and the area of contact of metal fin and the cooling water in the jar body is very big, can transmit the heat to the cooling water of condensing jar very fast, has improved the efficiency of heat exchange.
4. Make the judgement to the temperature in the condensation jar through controller and temperature-sensing ware to this controls the purpose that reaches the water of changing to the valve, and when breaking down, the jar internal temperature is too high and when not changing water, alarm device can sound, reminds the staff to overhaul.
5. The steam heat energy recovery system provided by the invention can maximally recycle high-temperature steam generated in industrial production, has high recovery rate, abundant recycling directions of steam heat energy and small heat loss, and prevents water resource waste and environmental pollution; the whole system is simple in configuration and low in manufacturing cost, can obviously reduce the production cost of enterprises, and has extremely high market application value.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a steam heat recovery system of the present invention;
FIG. 2 is a schematic view of the structure of a heat exchanger in example 1;
FIG. 3 is a schematic view of the structure of a condenser tube in embodiment 1;
FIG. 4 is a schematic view showing the structure of a metal heat sink in example 1;
reference numerals
1-production equipment, 2-heat exchanger, 201-tank body, 202-condenser pipe, 203-cooling water inlet, 204-cooling water outlet, 205-metal radiating fin, 206-temperature sensor, 207-alarm device, 3-steam pipeline, 4-steam compressor, 5-soft water tank, 6-steam mixer, 7-steam boiler, 8-steam circulating pipeline, 9-first high-temperature water pipe, 10-second high-temperature water pipe, 11-third high-temperature water pipe, 12-water outlet pump, 13-circulating water pipe, 14-circulating water pump, 15-cooling water inlet pipe, 16-cooling water pump, valve a, valve b, valve c, valve d and valve e.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of embodiments of the present application, generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
The present invention will be described in detail with reference to fig. 1 to 4.
Example 1:
the technical scheme adopted by the invention is as follows:
a steam heat energy recovery system comprises a production device 1 which takes high-temperature steam as a heat source; a heat exchanger 2 for condensing high-temperature steam, a high-temperature steam inlet arranged at the top of the heat exchanger 2, the high-temperature steam inlet connected with a production device 1 through a steam pipeline 3, a hot water outlet correspondingly arranged at the lower part of the side wall of the heat exchanger 2, a second high-temperature water pipe 10 connected with the hot water outlet, a cooling water inlet 203 and a cooling water outlet 204 arranged on the heat exchanger 2, the cooling water inlet 203 communicated with a cooling water inlet pipe 15, a cooling water pump 16 arranged on the cooling water inlet pipe 15, the cooling water outlet 204 communicated with the first high-temperature water pipe 9, a valve c arranged on the first high-temperature water pipe 9, a valve e arranged on the second high-temperature water pipe 10 between the steam mixer 6 and the heat exchanger 2 and a steam mixer 6, a first water outlet and a second water outlet arranged on the steam mixer 6, the first water outlet communicated with the second high-temperature water pipe 10, the second, circulating pipe 13 and production facility 1 intercommunication, be provided with circulating water pump 14 and valve b on circulating pipe 13, first high temperature water pipe 9 and second high temperature water pipe 10 pass through the three-way pipe and communicate with third high temperature water pipe 11, set gradually out water pump 12, valve a, softened water tank 5 and steam boiler 7 on the third high temperature water pipe 11, steam boiler 7's steam outlet and production facility 1 pass through steam circulating pipe 8 intercommunication, be provided with valve d on the steam circulating pipe 8.
The heat exchanger 2 comprises a tank body 201, a spiral condensation pipe 202 is arranged in the tank body 201, one end of a steam pipe is connected with a steam pipeline 3, the other end of the steam pipe is connected with a second high-temperature water pipe 10, a cooling water inlet 203 is further formed in the lower portion of the side wall of the tank body 201, the cooling water inlet 203 is communicated with a cooling water inlet pipe 15, a cooling water outlet 204 is further formed in the upper portion of the side wall of the tank body 201, the cooling water outlet 204 is communicated with a first high-temperature water pipe 9, and after low-temperature cooling water in the cooling water pipe absorbs heat in the steam pipe, the temperature rises to become hot water, and the hot water enters a steam boiler 7 through the first.
Further, the metal heat sink 205 is fixedly connected to the spiral portion of the steam pipe, and the metal heat sink 205 is preferably made of copper, because copper has good thermal conductivity and low manufacturing cost, heat in the steam pipe can be rapidly transferred to the copper sheet, and the contact area between the copper sheet and the cooling water in the tank body 201 is large, heat can be rapidly transferred to the cooling water in the condensation tank, and the heat exchange efficiency is improved.
Further, heat exchanger 2 still includes temperature-sensing ware 206, controller and alarm device 207, temperature-sensing ware 206 sets up in jar 201 and is connected with controller and alarm device 207, and the controller is connected with valve c and valve e, alarm device 207 includes bee calling organ and LED light alarm. Adopt this preferred technical scheme, can make the judgement to the temperature in the condensation jar through controller and temperature-sensing ware 206 to this control flap c and valve e, and then the temperature of control steam pipe exit reaches, and when breaking down, during the jar internal temperature was too high and not traded water, alarm device 207 can sound, reminds the staff to overhaul.
Wherein, because the hot water can produce the steam to influence the life-span of the water pump 12 when being higher than 70 ℃, so there are temperature inductors 206 in the heat exchanger 2, the temperature inductor 206 is set up specifically in the steam conduit 3 water outlet, used for monitoring the temperature of cooling water and steam water outlet, valves c and e are in the normal close state, the temperature inductor 206 has temperature threshold 65 degrees and 50 degrees, when the cooling water temperature is higher than 65 degrees, the valve c opens, the cooling water inputs the flexible hose, when the cooling water temperature is lower than 50 degrees, the valve c opens and closes; the valve e is opened when the temperature of the hot water in the steam pipe 3 is higher than 65 deg.c, and is closed when the temperature of the hot water in the steam pipe 3 is lower than 50 deg.c.
Wherein the vapor compressor 4 is a reciprocating compressor or a centrifugal type.
When the device works, high-temperature steam is generated by production equipment 1, the high-temperature steam is processed into compressed steam by a steam compressor 4, the high-temperature compressed steam is input into a heat exchanger 2 through a steam pipeline 3, the high-temperature compressed steam enters a spiral condensing pipe 202 in the heat exchanger and is subjected to low-temperature cooling water heat exchange to be condensed into a part of hot water and low-temperature steam, when a temperature sensor 206 detects that the temperature of the hot water is lower than 70 ℃, a valve e is opened, the hot water and the low-temperature steam are input into a steam mixer 6 through a third high-temperature water pipe 11, the low-temperature steam and the hot water are fully mixed to be converted into liquid water, a part of the mixed hot water is input into the production equipment 1 through a circulating water pipe 13 to be used, the first utilization of steam heat energy is realized, the other part of the hot water is input into a soft water tank 5 through a water outlet, the heat exchanger 2 is provided with a cooling water inlet 203 and a cooling water outlet 204, low-temperature cooling water is input into the heat exchanger 2 from the cooling water inlet 203, the temperature rises after heat exchange, when the temperature sensor 206 detects that the temperature of the cooling water reaches 70 ℃, a valve c is opened, the cooling water is input into the soft water tank 5 through the first high-temperature water pipe 9 to be reused for the steam boiler 7, the third utilization of steam heat energy is realized, the steam boiler 7 heats the hot water into steam, the steam is input into the production equipment 1 through the steam circulation pipeline 8 to be utilized, a complete steam heat energy internal circulation system is formed, high-temperature steam generated in industrial production can be furthest utilized, the recovery utilization rate is high, the reuse direction of the steam heat energy is rich, the heat loss is small, and the waste of water resources and the environmental pollution are prevented; the whole system is simple in configuration and low in manufacturing cost, can obviously reduce the production cost of enterprises, and has extremely high market application value.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are within the protection scope of the present application.
Claims (10)
1. A steam heat recovery system, comprising:
production equipment (1) using steam as a heat source;
the steam condensation device comprises a heat exchanger (2) for condensing steam, wherein a high-temperature steam inlet of the heat exchanger (2) is connected with production equipment (1) through a steam pipeline (3), and a steam compressor (4) is arranged on the steam pipeline (3);
the water softening tank (5) is used for storing hot water, the water softening tank (5) is connected with the heat exchanger (2) through a high-temperature water pipe, and a steam mixer (6) is arranged on the high-temperature water pipe;
a water inlet of the steam boiler (7) is connected with the soft water tank (5) through a pipeline, and a steam outlet of the steam boiler (7) is communicated with the production equipment (1) through a steam circulating pipeline (8).
2. The steam heat energy recovery system according to claim 1, wherein the high-temperature water pipes comprise a first high-temperature water pipe (9), a second high-temperature water pipe (10) and a third high-temperature water pipe (11), one end of each of the first high-temperature water pipe (9) and the second high-temperature water pipe (10) is connected to the heat exchanger (2), and the other end of each of the first high-temperature water pipe and the second high-temperature water pipe is communicated with the third high-temperature water pipe (11) through a three-way pipe.
3. A steam heat recovery system according to claim 1, characterized in that the steam mixer (6) is provided with a first water outlet and a second water outlet, the first water outlet is communicated with the soft water tank (5) through a second high-temperature water pipe (10) and a third high-temperature water pipe (11) in sequence, a water outlet pump (12) and a valve a are arranged on the third high-temperature water pipe (11), the second water outlet is communicated with the production equipment (1) through a circulating water pipe (13), a circulating water pump (14) and a valve b are arranged on the circulating water pipe (13), a hot water steam inlet is also arranged at the lower part of the steam mixer (6), the hot water steam inlet is connected with the water outlet of the heat exchanger (2) through a second high-temperature water pipe (10), a valve e is arranged on the second high-temperature water pipe (10) between the steam mixer (6) and the heat exchanger (2).
4. The steam heat energy recovery system according to claim 1, wherein the heat exchanger (2) is further connected with a cooling water inlet pipe (15), the cooling water inlet pipe (15) is provided with a cooling water pump (16), and the first high-temperature water pipe (9) is provided with a valve c.
5. The steam heat energy recovery system according to claim 4, wherein the heat exchanger (2) comprises a tank body (201), a spiral condenser pipe (202) is arranged in the tank body (201), one end of the condenser pipe (202) is connected with the steam pipeline (3), the other end of the condenser pipe is connected with the second high-temperature water pipe (10), a cooling water inlet (203) is further formed in the lower portion of the tank body (201), the cooling water inlet (203) is communicated with the cooling water inlet pipe (15), a cooling water outlet (204) is further formed in the upper portion of the tank body (201), and the cooling water outlet (204) is communicated with the first high-temperature water pipe (9).
6. The steam heat recovery system according to claim 5, wherein a metal fin (205) is fixedly attached to a spiral portion of the steam pipe.
7. A steam heat energy recovery system according to claim 6, characterized in that the heat exchanger (2) further comprises a temperature sensor (206), a controller and an alarm device (207), the temperature sensor (206) is arranged in the tank (201) and connected with the controller and the alarm device (207), and the controller is connected with the valve c and the valve e.
8. A heat energy recovery device according to claim 7, characterized in that the alarm device (207) comprises a buzzer and an LED light alarm.
9. A heat energy recovery device according to claim 1, characterized in that the steam circulation pipe (8) is provided with a valve d.
10. A heat energy recovery device according to claim 1, characterized in that the vapour compressor (4) is a reciprocating compressor or a centrifugal compressor.
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| CN202110365073.0A CN112963823B (en) | 2021-03-31 | 2021-03-31 | Steam heat energy recovery system |
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| CN202110365073.0A CN112963823B (en) | 2021-03-31 | 2021-03-31 | Steam heat energy recovery system |
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| CN113739597A (en) * | 2021-08-12 | 2021-12-03 | 苏州得一鲜食品科技有限公司 | Concentrated bone soup preparation system |
| CN115772593A (en) * | 2022-12-19 | 2023-03-10 | 山东磐金锻造机械有限公司 | Gas-liquid circulating safe steel forging device |
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| 刘民科: "烟气凝结换热器传热强化与工程应用研究", 《中国优秀硕士学位论文全文数据库.工程科技Ⅱ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739597A (en) * | 2021-08-12 | 2021-12-03 | 苏州得一鲜食品科技有限公司 | Concentrated bone soup preparation system |
| CN115772593A (en) * | 2022-12-19 | 2023-03-10 | 山东磐金锻造机械有限公司 | Gas-liquid circulating safe steel forging device |
| CN115772593B (en) * | 2022-12-19 | 2024-01-23 | 山东磐金锻造机械有限公司 | Gas-liquid circulation's safe shaped steel iron forging device |
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| Publication number | Publication date |
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| CN112963823B (en) | 2022-08-19 |
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