CN217302760U - Steam kettle steam curing steam heat energy recovery device containing hydrogen and air - Google Patents
Steam kettle steam curing steam heat energy recovery device containing hydrogen and air Download PDFInfo
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- CN217302760U CN217302760U CN202221119338.5U CN202221119338U CN217302760U CN 217302760 U CN217302760 U CN 217302760U CN 202221119338 U CN202221119338 U CN 202221119338U CN 217302760 U CN217302760 U CN 217302760U
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a steam pressure cauldron that contains hydrogen and air evaporates foster steam heat recovery unit, including the pit that is used for the blowdown, pit top be equipped with and evaporate the pressure cauldron, the blowdown end and the pit intercommunication that evaporate the pressure cauldron, the drainage end that evaporates the pressure cauldron be equipped with the comdenstion water heat energy recoverer that is used for retrieving the comdenstion water heat energy, the drainage end that evaporates the pressure cauldron be connected with the input of comdenstion water heat energy recoverer, the pressure cauldron right side be equipped with steam heat energy recovery unit, the exhaust end that evaporates the pressure cauldron be connected with steam heat energy recovery unit's input. The utility model overcomes the lower problem of energy utilization in the traditional still kettle that exists among the prior art. The utility model has the advantages of long service life and high energy utilization rate.
Description
Technical Field
The utility model relates to a waste heat recovery field, more specifically say, relate to a steam pressure cauldron that contains hydrogen and air evaporates foster steam heat recovery unit.
Background
In the air-entrapping production process, the principle that aluminum powder generates hydrogen under an alkaline condition is utilized to generate gas in concrete to produce an air-entrapping concrete product. The aerated concrete product is steamed in the still kettle, and because air exists in the still kettle, hydrogen is released in the steam curing process of the aerated concrete product. Non-condensable gases such as air and hydrogen enter the steam in the steam curing process. Along with the cyclic utilization of steam, the concentration of non-condensable gases such as air, hydrogen and the like in the steam is gradually increased, and the heat exchange coefficient of the steam is gradually reduced. Along with the reduction of the heat exchange coefficient of the steam, the heat transfer efficiency of the steam to the aerated product and the heat transfer capacity in unit time are gradually reduced, so that the production efficiency is reduced, the quality defects of products, such as watermarks, raw bricks and the like, are caused, and the product yield is reduced.
In the steam curing process, although the air in the autoclave is removed by means of vacuumizing or steam evacuation, there is no good method for removing non-condensable gases such as air and hydrogen mixed in the steam curing steam which is recycled. The adjustment valve is arranged at the top of the still kettle by the manufacturer of the de-woohan air-entrapping production equipment, and the adjustment valve at the top is opened to exhaust air to the atmosphere when the temperature difference between the top of the still kettle and the saturated steam reaches a certain value. In the steam curing process, part of domestic enterprises continuously discharge a mixture of steam and condensed water at the bottom of the still kettle, so that the gas-water mixture is directly discharged into the atmosphere. The steam discharged to the atmosphere not only wastes heat energy, but also pollutes the environment.
In the steam curing process of air-added products, when the gas temperature is kept at 1.05-1.4Mpa, a calcium-silicon reaction occurs, the reaction heat is released, the pressure of the autoclave is increased, and no matter at present, after the pressure of the autoclave is increased to a certain degree at home or abroad, partial steam is discharged to the atmosphere, or partial steam is released through a safety valve, heat energy waste and environmental pollution are caused, and when partial steam is released to the atmosphere through the safety valve, the product is damaged due to quick pressure drop.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome the lower problem of energy utilization in the traditional cauldron that evaporates that exists among the prior art, provide the cauldron that evaporates that contains hydrogen and air that has higher energy utilization and evaporate steam heat recovery unit now.
The utility model discloses a steam pressure cauldron that contains hydrogen and air evaporates foster steam heat recovery unit, including the pit that is used for the blowdown, pit top be equipped with and evaporate the cauldron, the blowdown end and the pit intercommunication that evaporate the cauldron, the drainage end that evaporates the cauldron be equipped with the comdenstion water heat energy recoverer that is used for retrieving the comdenstion water heat energy, the drainage end that evaporates the cauldron be connected with the input of comdenstion water heat energy recoverer, the cauldron right side that evaporates be equipped with steam heat energy recovery unit, the exhaust end that evaporates the cauldron be connected with steam heat energy recovery unit's input.
Preferably, a drain port is arranged at the bottom of the still kettle, one end of the drain port is connected with the input end of the condensed water heat energy recoverer through a condensed water pipe, the other end of the drain port is connected with a sewage discharge pipeline, and the outlet of the sewage discharge pipeline is positioned in the pit.
Preferably, the condensate pipe is sequentially provided with a stop valve for controlling the flow rate of condensate water in the condensate pipe and a filter for filtering the condensate water in the condensate pipe along the flow direction, and the sewage discharge pipeline is provided with a sewage discharge valve for controlling the flow rate of sewage in the sewage discharge pipeline.
Preferably, the exhaust port at the top of the still kettle is connected with the input end of the steam heat energy recovery device through a kettle top exhaust recovery pipeline.
Preferably, the kettle top exhaust recovery pipeline is provided with a kettle top exhaust valve, the kettle top exhaust recovery pipeline positioned on the right side of the kettle top exhaust valve is provided with an exhaust recovery collecting main pipe, and the kettle top exhaust recovery pipeline positioned between the kettle top exhaust valve and the exhaust recovery collecting main pipe is provided with a kettle top check valve.
Preferably, the condensed water heat energy recoverer comprises a second-stage steam-water separator, the input end of the second-stage steam-water separator is connected with the output end of the kettle top exhaust recovery pipeline, a second-stage low-pressure steam heat process and a second-stage condensed water heat process are arranged beside the second-stage steam-water separator respectively, an exhaust port at the top of the second-stage steam-water separator is connected with the second-stage low-pressure steam heat process through a second-stage recovered steam outlet pipe, a liquid discharge port at the bottom of the second-stage steam-water separator is connected with the second-stage condensed water heat process through a second-stage drain pipeline, and the second-stage drain pipeline is provided with a second-stage steam trap.
Preferably, a first-stage steam-water separator, a first-stage low-pressure steam heat process and a first-stage condensate water heat process are arranged beside the condensate water heat energy recoverer respectively, an exhaust port at the top of the condensate water heat energy recoverer is connected with the input end of the first-stage steam-water separator through a kettle bottom exhaust recovery pipeline, and a liquid discharge port at the bottom of the condensate water heat energy recoverer and a liquid discharge port of the first-stage steam-water separator are connected with the input end of the first-stage condensate water heat process through a tee-joint liquid discharge pipeline.
Preferably, the kettle bottom exhaust recovery pipeline is provided with a kettle bottom exhaust valve, and the kettle bottom exhaust recovery pipeline positioned on the right side of the kettle bottom exhaust valve is provided with a kettle bottom check valve.
Preferably, the first input end of the three-way liquid discharge pipeline is connected with a liquid discharge port at the bottom of the condensed water heat energy recoverer, the second input end of the three-way liquid discharge pipeline is connected with a liquid discharge port at the bottom of the primary steam-water separator, and the output end of the three-way liquid discharge pipeline is connected with the input end of the primary condensed water heat utilization process.
Preferably, the output end of the three-way liquid drainage pipeline is provided with a first-level steam trap.
Air and hydrogen in steam curing steam of the autoclave are mixed in the steam in a mixture mode, the autoclave is in a static state at constant temperature, the air content of the steam at the lower part of the autoclave is higher, and the hydrogen content of the steam at the upper part of the autoclave is higher.
And (3) placing the aerated concrete product into a still kettle for steam curing, and closing an exhaust valve at the top of the kettle and an exhaust valve at the bottom of the kettle after the still kettle is kept at a constant temperature for a certain time. At the constant temperature stage of the steam curing process of the aerated concrete, a calcium-silicon reaction is carried out in the still kettle to gradually release reaction heat, the pressure of the still kettle is gradually increased by 0.03-0.12Mpa, simultaneously, a mixture of condensed water and steam curing steam in the still kettle is discharged from a drain hole at the bottom of the still kettle, impurities are removed through a filter, then the mixture enters a gas-water separator to carry out gas-water separation, and the separated condensed water is discharged through a primary steam trap. Steam curing steam in the still kettle respectively flows out from a kettle top exhaust valve of the still kettle and a kettle bottom exhaust valve of the primary gas-water separator, the discharged steam enters an exhaust recovery pipe through a three-way gas pipeline after passing through the kettle top exhaust valve and then is converged into an exhaust recovery collecting main pipe, and the discharged steam enters a process heating process through the exhaust recovery collecting main pipe to be used as a heating medium, so that the chemical reaction heat of the still kettle is recovered. And gradually releasing the steam curing steam in the still kettle, gradually reducing the pressure of the still kettle, and respectively closing the primary gas-water separator, the kettle bottom exhaust valve and the kettle top exhaust valve when the pressure of the still kettle is reduced to be below 0.01-0.02 Mpa. And finally, emptying the autoclave.
The air and hydrogen in the steam of the autoclave are mixed in the steam in the form of mixture. The still kettle is in a static state at constant temperature, the steam at the lower part of the still kettle contains higher proportion of air, and the hydrogen at the upper part of the still kettle contains higher proportion of hydrogen.
The method comprises the following steps of installing a first-stage gas-water separator in front of a steam trap at the bottom of the still kettle, installing a steam trap at the outlet of the first-stage gas-water separator, installing a kettle bottom exhaust valve at the top of the first-stage gas-water separator, installing a kettle top exhaust valve at the top of the still kettle, installing check valves behind the kettle bottom exhaust valve and the kettle top exhaust valve, connecting exhaust pipes behind the gas check valves, connecting the exhaust pipes of all the still kettles together to form a collection header pipe, and connecting the collection header pipe with the second-stage gas-water separator. The steam-curing steam of the still kettle is discharged through exhaust, the steam-curing steam is collected and then subjected to gas-water separation through a secondary gas-water separator, the separated condensate water is discharged through a secondary steam trap for utilization, and the separated steam enters other low-pressure heating processes for utilization, such as pouring in the production process, slurry heating, heating in a stationary room, reinforcing steel bar drying, preheating boiler water supply, heating in a pre-kettle heat-preserving kiln and the low-pressure heating process outside the process production process. The low-pressure heating process utilizes the heat energy of the steam to discharge non-condensable gas. Therefore, steam is saved, the content of non-condensable gas in steam curing steam is reduced, the heat exchange coefficient of the steam curing steam is improved, the steam curing effect is enhanced, and the production efficiency is improved.
At the constant temperature stage of the steam curing process of the aerated concrete, the calcium-silicon reaction is carried out in the autoclave, the reaction heat is gradually released, the constant temperature pressure of the autoclave is gradually increased by about 0.03-0.12Mpa, when the pressure rises to a certain value, a first-stage gas-water separator and a top exhaust valve of the still kettle are opened, the top exhaust valve is connected with exhaust pipes through check valves, the exhaust pipes of all the still kettles are connected together to form a collecting main pipe, overpressure steam enters a second-stage gas-water separator through the collecting main pipe for gas-water separation, separated condensate water is discharged through a second-stage steam trap for utilization, the separated steam enters other low-pressure heating processes for utilization, such as pouring, slurry heating, heating in a still-stop period, reinforcing steel bar drying, boiler water preheating, heating in a pre-kettle heat-preservation kiln and low-pressure heating outside the process production process, wherein the low-pressure heating process utilizes the heat energy of complete steam and releases non-condensable gas in the steam at the same time. This recovers the heat of chemical reaction. And (3) gradually releasing steam in the still kettle, and closing a primary air-water separation exhaust valve of the still kettle and an exhaust valve at the top of the still kettle when the pressure of the still kettle is reduced to a certain value.
The aerated concrete product is firstly vacuumized or evacuated in the steam curing process, then steam curing gas is added, different still kettles are in different steam curing stages, and the pressure of the still kettles is different, so that a check valve must be arranged on an exhaust valve of the still kettle to prevent the discharged steam curing steam from flowing backwards.
The first stage steam trap may be a steam trap or a self-control valve or a manual operation valve controlled by a sensor, the steam mixture of hydrogen and air is discharged through an exhaust valve and a check valve, the exhaust valve may be a self-control valve or a manual operation valve controlled by a sensor, the second stage steam trap may be a steam trap or a self-control valve or a manual operation valve controlled by a sensor, and the process heating process may be pouring, slurry heating, standing still, steel bar drying, boiler water supply preheating and pre-kettle heat preservation kiln.
The exhaust valve can be an automatic control valve controlled by a sensor or a manually operated valve, steam in the still kettle is exhausted through the exhaust valve at the bottom of the still kettle, and exhaust pipes of different still kettles are gathered together to form a gathering main pipe.
The utility model discloses following beneficial effect has: long service life and high energy utilization rate.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
A pit 1, an autoclave 2, a condensed water heat energy recoverer 3, a drain port 4, a condensed water pipe 5, a sewage discharge pipeline 6, a cut-off valve 7, a filter 8, a sewage discharge valve 9, an autoclave top exhaust recovery pipeline 10, an autoclave top exhaust valve 11, an exhaust recovery collecting main pipe 12, an autoclave top check valve 13, a secondary steam-water separator 14, a secondary low-pressure steam heat utilization process 15, a secondary condensed water heat utilization process 16, a secondary recovered steam outlet pipe 17, a secondary drain pipeline 18, a secondary steam trap 19, a primary steam-water separator 20, a primary low-pressure steam heat utilization process 21, a primary condensed water heat utilization process 22, an autoclave bottom exhaust recovery pipeline 23, a three-way liquid discharge pipeline 24, an autoclave bottom exhaust valve 25, an autoclave bottom check valve 26 and a primary steam trap 27.
Detailed Description
The technical solution of the present invention is further specifically described below by way of embodiments and with reference to the accompanying drawings.
The embodiment is as follows: the steam autoclave steam curing steam heat energy recovery device containing hydrogen and air comprises a pit 1 for discharging sewage, wherein a steam autoclave 2 is arranged above the pit 1, a sewage discharge end of the steam autoclave 2 is communicated with the pit 1, a condensate water heat energy recoverer 3 for recovering the heat energy of condensate water is arranged at a water discharge end of the steam autoclave 2, a water discharge end of the steam autoclave 2 is connected with an input end of the condensate water heat energy recoverer 3, a steam heat energy recovery device is arranged on the right side of the steam autoclave 2, and an exhaust end of the steam autoclave 2 is connected with an input end of the steam heat energy recovery device.
The bottom of the still kettle 2 is provided with a drain 4, one end of the drain 4 is connected with the input end of the condensed water heat energy recoverer 3 through a condensed water pipe 5, the other end of the drain 4 is connected with a sewage discharge pipeline 6, and the outlet of the sewage discharge pipeline 6 is positioned in the pit 1.
And an exhaust port at the top of the still kettle 2 is connected with an input end of the steam heat energy recovery device through a kettle top exhaust recovery pipeline 10.
Kettle top exhaust recovery pipeline 10 on be equipped with kettle top exhaust valve 11, be equipped with exhaust recovery set house steward 12 on the kettle top exhaust recovery pipeline 10 that is located kettle top exhaust valve 11 right side, be equipped with kettle top check valve 13 on the kettle top exhaust recovery pipeline 10 that is located between kettle top exhaust valve 11 and exhaust recovery set house steward 12.
The condensed water heat energy recoverer 3 comprises a second-stage steam-water separator 14, the input end of the second-stage steam-water separator 14 is connected with the output end of the kettle top exhaust recovery pipeline 10, a second-stage low-pressure steam heat process 15 and a second-stage condensed water heat process 16 are arranged beside the second-stage steam-water separator 14 respectively, an exhaust port at the top of the second-stage steam-water separator 14 is connected with the second-stage low-pressure steam heat process 15 through a second-stage recovered steam outlet pipe 17, a liquid discharge port at the bottom of the second-stage steam-water separator 14 is connected with the second-stage condensed water heat process 16 through a second-stage drain pipeline 18, and a second-stage drain device 19 is arranged on the second-stage drain pipeline 18.
The condensed water heat energy recoverer is characterized in that a first-stage steam-water separator 20, a first-stage low-pressure steam heat process 21 and a first-stage condensed water heat process 22 are arranged beside the condensed water heat energy recoverer 3 respectively, an exhaust port in the top of the condensed water heat energy recoverer 3 is connected with the input of the first-stage steam-water separator 20 through a kettle bottom exhaust recovery pipeline 23, and a liquid discharge port in the bottom of the condensed water heat energy recoverer 3 and a liquid discharge port of the first-stage steam-water separator 20 are connected with the input end of the first-stage condensed water heat process 22 through a tee-joint liquid discharge pipeline 24.
The kettle bottom exhaust recovery pipeline 23 is provided with a kettle bottom exhaust valve 25, and the kettle bottom exhaust recovery pipeline 23 on the right side of the kettle bottom exhaust valve 25 is provided with a kettle bottom check valve 26.
The first input end of the three-way liquid discharge pipeline 24 is connected with a liquid discharge port at the bottom of the condensed water heat energy recoverer 3, the second input end of the three-way liquid discharge pipeline 24 is connected with a liquid discharge port at the bottom of the primary steam-water separator 20, and the output end of the three-way liquid discharge pipeline 24 is connected with the input end of the primary condensed water heat utilization process 22.
The output end of the three-way drainage pipeline 24 is provided with a first-level steam trap 27.
The above description is only for the specific embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.
Claims (10)
1. The steam autoclave steam curing steam heat energy recovery device comprises a pit (1) for discharging sewage, and is characterized in that a steam autoclave (2) is arranged above the pit (1), a sewage discharge end of the steam autoclave (2) is communicated with the pit (1), a condensate water heat energy recoverer (3) is arranged below the steam autoclave (2), a water discharge end of the steam autoclave (2) is connected with an input end of the condensate water heat energy recoverer (3), a steam heat energy recovery device is arranged on the right side of the steam autoclave (2), and an exhaust end of the steam autoclave (2) is connected with an input end of the steam heat energy recovery device.
2. The recovery device of steam heat energy of autoclave steam curing containing hydrogen and air according to claim 1, characterized in that the bottom of the autoclave (2) is provided with a drain opening (4), one end of the drain opening (4) is connected with the input end of a condensed water heat energy recoverer (3) through a condensed water pipe (5), the other end of the drain opening (4) is connected with a sewage discharge pipeline (6), and the outlet of the sewage discharge pipeline (6) is positioned in the pit (1).
3. The recovery device of steam heat energy of autoclave steam containing hydrogen and air as claimed in claim 2, wherein the condensed water pipe (5) is sequentially provided with a cut-off valve (7) for controlling the flow rate of condensed water in the condensed water pipe (5) and a filter (8) for filtering the condensed water in the condensed water pipe (5) along the flow direction, and the blow-off pipe (6) is provided with a blow-off valve (9) for controlling the flow rate of sewage in the blow-off pipe (6).
4. The steam-curing steam heat energy recovery device of the autoclave containing hydrogen and air as claimed in claim 1, wherein the exhaust port at the top of the autoclave (2) is connected with the input end of the steam heat energy recovery device through an exhaust gas recovery pipeline (10) at the top of the autoclave.
5. The recovery device of steam heat energy of autoclave steam curing containing hydrogen and air according to claim 4, characterized in that the exhaust gas recovery pipeline (10) on the top of the autoclave is provided with an exhaust gas valve (11) on the top of the autoclave, the exhaust gas recovery pipeline (10) on the right side of the exhaust gas valve (11) on the top of the autoclave is provided with an exhaust gas recovery manifold (12), and the exhaust gas recovery pipeline (10) between the exhaust gas valve (11) on the top of the autoclave and the exhaust gas recovery manifold (12) is provided with a check valve (13) on the top of the autoclave.
6. The steam autoclave steam heat energy recovery device containing hydrogen and air according to claim 4, it is characterized in that the condensed water heat energy recoverer (3) comprises a secondary gas-water separator (14), the input end of the secondary gas-water separator (14) is connected with the output end of the kettle top exhaust recovery pipeline (10), a secondary low-pressure steam heat process (15) and a secondary condensed water heat process (16) are respectively arranged beside the secondary gas-water separator (14), an exhaust port at the top of the secondary gas-water separator (14) is connected with a secondary low-pressure steam heat process (15) through a secondary recovery steam outlet pipe (17), a liquid outlet at the bottom of the secondary gas-water separator (14) is connected with a secondary condensed water heat process (16) through a secondary drainage pipeline (18), and a secondary steam trap (19) is arranged on the secondary steam trap pipeline (18).
7. The steam-heating heat recovery device of the autoclave containing hydrogen and air according to claim 1, wherein a first-stage steam-water separator (20), a first-stage low-pressure steam-heating process (21) and a first-stage condensate-water-heating process (22) are respectively arranged beside the condensate-water heat-energy recoverer (3), an exhaust port at the top of the condensate-water heat-energy recoverer (3) is connected with an input of the first-stage steam-water separator (20) through a kettle bottom exhaust-gas recovery pipeline (23), and a liquid discharge port at the bottom of the condensate-water heat-energy recoverer (3) and a liquid discharge port of the first-stage steam-water separator (20) are respectively connected with an input end of the first-stage condensate-water-heating process (22) through a three-way liquid discharge pipeline (24).
8. The steam-pressure kettle steam-curing steam heat energy recovery device containing hydrogen and air as claimed in claim 7, wherein the kettle bottom exhaust gas recovery pipeline (23) is provided with a kettle bottom exhaust valve (25), and the kettle bottom exhaust gas recovery pipeline (23) positioned at the right side of the kettle bottom exhaust valve (25) is provided with a kettle bottom check valve (26).
9. The steam-pressure autoclave steam-curing steam heat energy recovery device containing hydrogen and air as claimed in claim 7, characterized in that the first input end of the three-way liquid discharge pipeline (24) is connected with the liquid discharge port at the bottom of the condensed water heat energy recoverer (3), the second input end of the three-way liquid discharge pipeline (24) is connected with the liquid discharge port at the bottom of the primary gas-water separator (20), and the output end of the three-way liquid discharge pipeline (24) is connected with the input end of the primary condensed water heat process (22).
10. The steam-pressure kettle steam-curing steam heat energy recovery device containing hydrogen and air as claimed in claim 9, characterized in that the output end of the three-way drainage pipeline (24) is provided with a primary steam trap (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221119338.5U CN217302760U (en) | 2022-05-11 | 2022-05-11 | Steam kettle steam curing steam heat energy recovery device containing hydrogen and air |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221119338.5U CN217302760U (en) | 2022-05-11 | 2022-05-11 | Steam kettle steam curing steam heat energy recovery device containing hydrogen and air |
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| CN217302760U true CN217302760U (en) | 2022-08-26 |
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| CN202221119338.5U Active CN217302760U (en) | 2022-05-11 | 2022-05-11 | Steam kettle steam curing steam heat energy recovery device containing hydrogen and air |
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| CN (1) | CN217302760U (en) |
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