Heat recovery system of autoclaved curing kettle

Abstract

The invention relates to the technical field of waste heat utilization of autoclaved curing kettles, and provides a heat recovery system of an autoclaved curing kettle. The heat exchange purification module is communicated with the kettle body through a first passage and is used for exchanging heat with dead steam in the kettle body to obtain pure first steam; the compression enthalpy increasing module is connected with the heat exchange purification module and used for performing compression enthalpy increasing on the first steam to obtain second steam; and the steam energy storage module is connected with the compression enthalpy increasing module, is connected with the kettle body through a first loop, and is used for storing the second steam and returning the second steam to the kettle body. Through the arrangement, waste steam in the kettle body can be subjected to heat exchange with saturated purified water through the heat exchange purification module to generate new impurity-free first steam, and the first steam is subjected to compression enthalpy increase through the compression enthalpy increase module and is used as heat source steam, so that heat in the kettle body can be fully recycled, and the energy consumption is reduced; meanwhile, impurities in the dead steam are removed through heat exchange, and the quality of products in subsequent production is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat utilization of an autoclave curing kettle, and in particular to a heat recovery system for an autoclave curing kettle. Background Art

[0002] Autoclaving is the main stage in which the aerated concrete body undergoes hardening reaction and strength enhancement. Under autoclaving conditions, a series of physical and chemical reactions between the various components of aerated concrete generate a variety of hydration products. This process requires both the scientific and rational use of the moist and hot conditions of autoclaving to fully carry out the hydrothermal reaction inside the aerated concrete and achieve the desired strength of the aerated concrete, and the effective avoidance of situations that may be unfavorable to the hydrothermal reaction or damage the curing effect and product quality during the autoclaving process.

[0003] After autoclaving, the exhaust steam still contains a large amount of heat. If it is discharged directly, it will inevitably cause a huge waste of energy. Therefore, in the relevant technology, an energy storage tank is generally used to recover and store the high-pressure exhaust steam so that it can be recharged into the kettle later to achieve the purpose of reusing the waste heat.

[0004] However, the above method can only recover and store high-pressure exhaust steam, resulting in incomplete heat recovery and serious waste. In addition, there are a large number of impurities in the waste steam, which may have a certain impact on the quality of the product after being refilled into the kettle. Summary of the invention

[0005] The present invention provides a heat recovery system for an autoclave curing kettle, which is used to reduce the problem in the prior art that waste steam heat recovery is not thorough enough and impurities in the waste steam may affect product quality, thereby achieving full recovery and utilization of waste heat and ensuring product quality.

[0006] The present invention provides a heat recovery system for an autoclave curing kettle, comprising:

[0007] Kettle body;

[0008] A heat exchange purification module is connected to the kettle body through a first passage, and is used for exchanging heat with the exhaust steam in the kettle body to obtain pure first steam;

[0009] A compression and enthalpy-increasing module, connected to the heat exchange and purification module, and used for compressing and enthalpy-increasing the first steam to obtain a second steam;

[0010] The steam energy storage module is connected to the compression enthalpy increasing module and is connected to the kettle body through a first loop, and is used for storing the second steam and returning the second steam to the kettle body.

[0011] According to the autoclave heat recovery system provided by the present invention, a second circuit and a second passage are connected between the heat exchange purification module and the kettle body;

[0012] The second circuit is used to supply condensed water after heat exchange in the heat exchange purification module to flow back to the kettle body;

[0013] The second passage is used to return the condensed water in the kettle body to the heat exchange purification module for heat exchange to obtain the first steam.

[0014] According to a heat recovery system for an autoclave curing kettle provided by the present invention, at least two kettle bodies are provided, and the first circuit is connected to the plurality of kettle bodies respectively through branches.

[0015] A heat recovery system for an autoclave curing kettle provided according to the present invention further includes a negative pressure member, and the negative pressure member is connected to the kettle body through a third passage.

[0016] According to a heat recovery system for an autoclave curing kettle provided by the present invention, the heat exchange purification module comprises:

[0017] An evaporator, used for exchanging heat with the heat in the kettle body and generating steam;

[0018] A first separator, connected to the evaporator, for performing gas-liquid separation on the steam generated by the evaporator;

[0019] The filter is connected to the first separator and is used to remove liquid droplets entrained in the steam to form the first steam.

[0020] According to the autoclave heat recovery system provided by the present invention, the first separator is connected to the evaporator via a third loop, which is used for the liquid phase in the first separator to flow back to the evaporator for evaporation.

[0021] According to a heat recovery system for an autoclave curing kettle provided by the present invention, the compression enthalpy increase module comprises:

[0022] A compressor, used for compressing the first steam to increase enthalpy and form the second steam;

[0023] The water spray cooling component is used for spraying and cooling the compressor.

[0024] According to a heat recovery system for an autoclave curing kettle provided by the present invention, the water spray cooling component includes a water spray tank and a water spray pump; the water spray tank is used to hold cooling water, and the water spray pump is used to extract cooling water in the water spray tank to spray the compressor.

[0025] According to a heat recovery system for an autoclave curing kettle provided by the present invention, the compressor also has a vacuum pumping function to form the negative pressure member, and the kettle body is connected to the compressor through the third passage.

[0026] According to a heat recovery system for an autoclave curing kettle provided by the present invention, the steam energy storage module comprises:

[0027] a second separator, connected to the compressor, for performing gas-liquid separation on the second steam;

[0028] A steam storage tank, whose air inlet is connected to the second separator and is used to store the second steam, and whose air outlet is connected to the kettle body through the first loop and is used to release the second steam into the kettle body.

[0029] According to the autoclave heat recovery system provided by the present invention, the second separator is connected to the water spray tank via a fourth loop, so as to allow the liquid phase separated by the second separator to flow back to the water spray tank.

[0030] According to the autoclave curing kettle heat recovery system provided by the present invention, the water spray tank is connected to the air intake port of the compressor through the fourth passage.

[0031] According to a heat recovery system for an autoclave curing kettle provided by the present invention, a coil is arranged in the spray tank, and the coil is used for allowing coolant to pass through to cool the cooling water in the spray tank.

[0032] According to a heat recovery system for an autoclave curing kettle provided by the present invention, the first separator is connected to the evaporator via a third loop, so as to allow the liquid phase separated by the first separator to flow back to the evaporator.

[0033] The present invention provides a heat recovery system for an autoclave curing kettle. The exhaust steam in the kettle body can be heat exchanged with saturated pure water through a heat exchange purification module. The saturated pure water absorbs the waste heat of the exhaust steam and its temperature rises to become a new first steam without impurities. The first steam is compressed and enthalpy increased through a compression enthalpy increase module to increase the pressure and temperature of the first steam to form a second steam. The second steam is stored through a steam energy storage module and can be reused as a heat source steam. With such a configuration, the heat in the kettle body can be fully recycled and utilized, and impurities in the exhaust steam can be removed through heat exchange, thereby ensuring the quality of products in subsequent production. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a structural schematic diagram of a heat recovery system for an autoclave curing kettle provided in an embodiment of the present invention;

[0036] Figure 2 is a schematic structural diagram of a heat exchange purification module provided in an embodiment of the present invention;

[0037] Figure 3 is a structural schematic diagram of a compression enthalpy increase module provided in an embodiment of the present invention;

[0038] Figure 4 It is a schematic structural diagram of a steam energy storage module provided in an embodiment of the present invention.

[0039] Reference numerals:

[0040] 1. Kettle body; 10. First kettle; 11. Second kettle; 2. Heat exchange purification module; 20. Evaporator; 200. First pressure detector; 201. First temperature detector; 21. First separator; 210. First liquid level gauge; 22. Filter; 23. Third circuit; 24. First water supply pipe; 240. First water supply valve; 3. Compression enthalpy increase module; 30. Compressor; 31. Water spray cooling component; 310. Water spray tank; 311. Water spray pump; 312. Second temperature detector; 313. Fourth passage; 314. Eleven valves; 32. Fourth circuit; 33. Second water supply pipe; 330. Second water supply valve; 4. Steam energy storage module; 40. Second separator; 400 , the second liquid level gauge; 41, the steam storage tank; 410, the second pressure detector; 411, the third temperature detector; 412, the pressure relief valve; 5, the first passage; 50, the first branch; 500, the first valve; 51, the second branch; 510, the second valve; 6, the first loop; 60, the first branch; 600, the third valve; 61, the second branch; 610, the fourth valve; 7, the second loop; 8, the second passage; 80, the third branch; 800, the fifth valve; 81, the fourth branch; 810, the sixth valve; 9, the third passage; 90, the fifth branch; 900, the seventh valve; 91, the sixth branch; 910, the eighth valve; 92, the heat source pipe; 920, the ninth valve; 93, the tenth valve. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In order to facilitate understanding of the autoclave heat recovery system provided by the present invention, its application background is first explained. Autoclave curing is the main stage for the hardening reaction and strength enhancement of aerated concrete blanks. After autoclave curing, the waste steam in the kettle body still contains a large amount of heat, and direct discharge will cause a huge waste of energy. Therefore, in the prior art, an energy storage tank is generally used to recycle and store high-pressure exhaust steam, and then the steam stored in the energy storage tank is refilled into the kettle body to achieve the purpose of waste heat reuse. However, the above method can only recycle high-pressure exhaust steam, and low-pressure exhaust steam will still be discharged. The heat recovery is not thorough enough and the waste is relatively serious. In addition, there are a large number of impurities in the waste steam, and directly refilling the kettle body may have a certain impact on the quality of the product.

[0043] Mechanical steam compression is an efficient energy-saving technology that uses a steam compressor to work on secondary steam to increase the pressure and temperature of the secondary steam. The heated steam can be reused as heat source steam, thereby saving the original heat source steam and achieving the purpose of energy saving. Based on the above, the present invention provides a heat recovery system for autoclave curing kettle, which can more thoroughly recover the heat in the waste steam and ensure the quality of the product.

[0044] Combine the following Figure 1-Figure 4 The autoclave heat recovery system of the present invention is described.

[0045] Reference Figure 1 A heat recovery system for an autoclave curing kettle comprises a kettle body 1, a heat exchange and purification module 2, a compression enthalpy increase module 3 and a steam energy storage module 4; wherein the kettle body 1 is a container for autoclave curing of aerated concrete blanks; the heat exchange and purification module 2 is connected to the kettle body 1 through a first passage 5. After the concrete blanks are steam-cured, the waste steam in the kettle body 1 can be discharged into the heat exchange and purification module 2 through the first passage 5 for heat exchange to obtain pure first steam; the compression enthalpy increase module 3 is connected to the heat exchange and purification module 2, and is used to compress and increase the enthalpy of the first steam to obtain a second steam; the steam energy storage module 4 is connected to the compression enthalpy increase module 3, and is connected to the kettle body 1 through a first loop 6, and is used to store the second steam, and according to actual production needs, the second steam is returned to the kettle body 1 for reuse.

[0046] In practical applications, the exhaust steam in the kettle 1 can be heat exchanged with saturated pure water through the heat exchange purification module 2. The saturated pure water absorbs the waste heat of the exhaust steam and its temperature rises to become new first steam without impurities. The first steam is compressed and enthalpy increased through the compression enthalpy increase module 3 to increase the pressure and temperature of the first steam to form second steam. The second steam is stored through the steam energy storage module 4 and can be used as heat source steam again. In this way, the heat in the kettle 1 can be fully recycled and utilized, and impurities in the exhaust steam can be removed through heat exchange, thereby ensuring the quality of products in subsequent production.

[0047] Reference Figure 1 and Figure 2 , the heat exchange purification module 2 is connected to the kettle body 1 with a second loop 7 and a second passage 8; after the exhaust steam in the kettle body 1 exchanges heat with the saturated pure water in the heat exchange purification module 2, it will condense into liquid high-temperature condensed water, and the high-temperature condensed water will flow back to the kettle body 1 through the second loop 7 for temporary storage. When the condensed water in the kettle body 1 is enriched to a certain amount, it can enter the heat exchange purification module 2 through the second passage 8 to exchange heat with the saturated pure water to obtain the above-mentioned pure first steam. The first steam is compressed to increase enthalpy and becomes the second steam and is stored in the steam energy storage module 4 for use as heat source steam. With this arrangement, the heat in the high-temperature condensed water can be recovered, so that the waste heat in the exhaust steam can be more fully and thoroughly recycled and utilized, reducing waste.

[0048] Specifically, refer to Figure 1 The kettle body 1 is provided with two, namely the first kettle 10 and the second kettle 11, the first passage 5 has two branches, one of which is the first branch 50, which is used to connect the first kettle 10 and the heat purification module 2, and the first valve 500 is provided on the first branch 50; the other branch is the second branch 51, which is used to connect the second kettle 11 and the heat exchange purification module 2, and the second branch 51 is provided with a second valve 510; by controlling the on-off and opening of the first valve 500 and the second valve 510, the waste steam in the first kettle 10 or the second kettle 11 can be discharged into the heat exchange purification module 2 at a specific discharge rate for heat exchange.

[0049] The first loop 6 has two branches, namely a first branch 60 and a second branch 61, wherein the first branch 60 is used to connect the first kettle 10 and the steam energy storage module 4, and a third valve 600 is provided on the first branch 60; the second branch 61 is used to connect the second kettle 11 and the steam energy storage module 4, and a fourth valve 610 is provided on the second branch 61. By controlling the on-off and opening of the third valve 600 and the fourth valve 610, the second steam can be discharged into the first kettle 10 or the second kettle 11 at a specific discharge rate.

[0050] Similarly, the second passage 8 has two branches, namely the third branch 80 and the fourth branch 81, wherein the third branch 80 is used to connect the first kettle 10 and the steam energy storage module 4, and the third branch 80 is provided with a fifth valve 800, and the fourth branch 81 is used to connect the second kettle 11 and the steam energy storage module 4, and the fourth branch 81 is provided with a sixth valve 810. When the condensed water in the kettle body 1 is enriched to a certain amount, by controlling the on-off and opening of the fifth valve 800 and the sixth valve 810, the high-temperature condensed water in the first kettle 10 or the second kettle 11 can be passed into the heat exchange purification module 2 at a specific rate for heat exchange.

[0051] By controlling the opening and closing and the opening degree of each valve, the first kettle 10 and the second kettle 11 are coordinated and cooperated, and the two kettle bodies 1 are used in a standby mode. For example, when the steam curing work in the first kettle 10 is completed, the first valve 500 and the fourth valve 610 can be opened, and the waste steam in the first kettle 10 is passed into the heat exchange and purification module 2 for heat exchange and purification. The first steam is compressed and enthalpy increased to obtain the second steam, and the second steam is released into the second kettle 11 as a new heat source steam to prepare for the steam curing work of the second kettle 11; conversely, the second valve 510 and the third valve 600 are opened to discharge the exhaust steam in the second kettle 11 for heat exchange, and the generated second steam is released into the first kettle 10 to prepare for the steam curing work of the first kettle 10. In this way, the waste heat steam in the process of turning over the kettle can be fully recycled and utilized, and the exhaust steam discharge time and the second steam delivery time can be adjusted by controlling the opening degree of the valve, so that the steam recovery is matched with the production process.

[0052] The heat recovery system of the autoclave curing kettle also includes a negative pressure piece, which is connected to the kettle body 1 through the third passage 9. Through the negative pressure piece, the kettle body 1 can be evacuated to achieve the effect of vacuuming and cooling. Specifically, the third passage 9 has a main passage and two branches, and the two branches are the fifth branch 90 and the sixth branch 91, wherein the fifth branch 90 is used to connect the first kettle 10 and the negative pressure piece, and the fifth branch 90 is provided with a seventh valve 900, and the sixth branch 91 is used to connect the second kettle 11 and the negative pressure piece, and the sixth branch 91 is provided with an eighth valve 910; by controlling the opening and closing of the seventh valve 900 and the eighth valve 910, the first kettle 10 or the second kettle 11 can be vacuumed and cooled.

[0053] In actual operation, before inputting steam into the kettle body 1, first open the vacuum part and the seventh valve 900 or the eighth valve 910 to evacuate the kettle body 1, then input steam to a predetermined pressure, maintain the pressure and steam for a period of time, perform the above-mentioned waste heat recovery operation, and evacuate the next kettle body 1 for the next cycle.

[0054] The kettle body 1 is connected with a heat source pipe 92 for connecting external heat source steam. When the steam demand cannot be provided by the steam energy storage module 4, sufficient steam can be provided to the kettle body 1 through the heat source pipe 92. Specifically, the heat source pipe 92 is connected with the third passage 9, and a ninth valve 920 is provided on the heat source pipe 92. The main passage of the third passage 9 is provided with a tenth valve 93. By opening the ninth valve 920, and then selectively opening the seventh valve 900 and the eighth valve 910, the first kettle 10 or the second kettle 11 can be filled with external heat source steam.

[0055] It is understandable that, according to actual production needs, the kettle body 1 can also be set to more than two, and the number of each branch, branch and valve can be increased accordingly. By controlling the opening and closing or opening degree of the valves on each branch or branch, multiple kettle bodies 1 can cooperate with each other and operate in coordination to match steam recovery with the production process.

[0056] Specifically, refer to Figure 2 The thermal purification module includes an evaporator 20, a first separator 21 and a filter 22; wherein the evaporator 20 is a mature existing technology, and its model and specifications can be selected according to actual needs. The evaporator 20 has a heating chamber and an evaporation chamber, and the first passage 5 and the second passage 8 are both connected to the heating chamber of the evaporator 20, so that the high-temperature exhaust steam and condensed water can be used as heat sources to heat the saturated pure water in the evaporation chamber and obtain pure steam; the second loop 7 is connected to the condensed water outlet of the evaporator 20, and is used to supply the condensed water back to the kettle body 1. The evaporator 20 is provided with a first pressure detector 200 and a first temperature detector 201, which are used to detect the pressure and temperature in the evaporator 20. The staff can adjust the components accordingly according to the changes in the temperature, pressure and other parameters of the evaporator 20.

[0057] The inlet of the first separator 21 is connected to the evaporator 20, and is used to perform gas-liquid separation on the steam generated by the evaporator 20. The outlet is connected to the filter 22. After gas-liquid separation by the first separator 21, the steam enters the filter 22 to further remove droplets entrained in the steam, thereby generating the above-mentioned first steam.

[0058] Specifically, the first separator 21 is connected to the evaporation chamber of the evaporator 20 through the third loop 23. The liquid phase generated after the first separator 21 separates the steam flows back to the evaporator 20 through the third loop 23 for reuse. A first water replenishment pipe 24 is provided on the first separator 21 and / or the evaporator 20. When the saturated pure water content in the evaporator 20 is insufficient, water can be replenished into the evaporator 20 through the first water replenishment pipe 24. The first water replenishment pipe 24 is provided with a first water replenishment valve 240 for controlling the on-off of the first water replenishment pipe 24.

[0059] Specifically, the first water replenishment pipe 24 is arranged on the first separator 21; the first separator 21 is connected to the first liquid level meter 210, which is used to monitor the liquid level of the liquid phase in the first separator 21. When the liquid level of the liquid phase in the first separator 21 is insufficient, the first water replenishment valve 240 can be opened to replenish water into the first separator 21, thereby ensuring the water amount in the evaporator 20.

[0060] It is understandable that the specific model, specification, operating parameters, etc. of the first separator 21 and the filter 22 can be selected according to actual needs.

[0061] Reference Figure 3 and Figure 4 , the outlet of the filter 22 is connected to the compression enthalpy increasing module 3, and the first steam enters the compression enthalpy increasing module 3 for compression. The compression enthalpy increasing module 3 includes a compressor 30 and a water spray cooling component 31; the outlet of the filter 22 is connected to the air intake of the compressor 30; the specific model and specification of the compressor 30 can be selected according to actual needs. Specifically, the selected compressor 30 can have a certain vacuuming ability, thereby forming the above-mentioned negative pressure part. The kettle body 1 is connected to the compressor 30 through the third passage 9. By reasonably controlling the opening and closing of each valve, the compressor 30 can not only compress the steam, but also vacuumize and cool the kettle body 1.

[0062] Specifically, the compressor 30 uses a single screw compressor 30 with a compression ratio of 10 times and a temperature rise of 30-80 degrees.

[0063] It is understandable that the negative pressure member may also adopt a vacuum pump or a vacuum generator to achieve a relatively better vacuuming effect.

[0064] The water spray cooling component 31 is mainly used to spray water to cool the compressor 30, so as to protect the compressor 30, prevent it from being stuck due to high temperature, and ensure the stable operation of the compressor 30. Specifically, the water spray cooling component 31 includes a water spray tank 310 and a water spray pump 311; wherein the water spray tank 310 is used to contain cooling water, and the water spray pump 311 is connected to the water spray tank 310, and is used to extract the cooling water in the water spray tank 310 to spray the compressor 30.

[0065] The steam energy storage module 4 includes a second separator 40 and a steam storage tank 41; the outlet of the compressor 30 is connected to the inlet of the second separator 40, and the second separator 40 is used to separate the second steam into gas and liquid. The obtained liquid phase flows back to the water spray tank 310 through the fourth loop 32 to replenish the water spray tank 310.

[0066] In order to reduce the influence of the refluxed water in the second separator 40 on the water temperature in the water spray tank 310, a second temperature detector 312 is provided on the water spray tank 310 for detecting the water temperature in the water spray tank 310; the water spray tank 310 is connected to the air intake port of the compressor 30 through the fourth passage 313, and an eleventh valve 314 is provided on the fourth passage 313. By controlling the opening and closing and the opening degree of the eleventh valve 314, the cooling water in the water spray tank 310 can be vacuumed and cooled. Specifically, when the water temperature rises, the opening degree of the eleventh valve 314 can be increased, and when the water temperature decreases, the opening degree of the eleventh valve 314 can be reduced. A coil is provided in the water spray tank 310, and the coil is used for the coolant to pass through. Through the heat exchange of the coil, the cooling water in the water spray tank 310 can be cooled, so that the cooling water in the water spray tank 310 maintains a suitable temperature.

[0067] A second water replenishment pipe 33 is provided on the water spray tank 310 and / or the second separator 40. When the coolant in the water spray tank 310 is insufficient, water can be replenished into the water spray tank 310 through the second water replenishment pipe 33; a second water replenishment valve 330 is provided on the second water replenishment pipe 33 for controlling the opening and closing of the second water replenishment pipe 33.

[0068] Specifically, the second water replenishment pipe 33 is arranged on the second separator 40, and the second separator 40 is connected to a second liquid level meter 400 for monitoring the liquid level of the liquid phase in the second separator 40. When the liquid phase in the second separator 40 is insufficient, the second water replenishment valve 330 can be opened to replenish water in the second separator 40, and the liquid phase flows back to the spray tank 310 through the fourth loop 32 to ensure the amount of cooling water in the spray tank 310.

[0069] The outlet of the second separator 40 is connected to the inlet of the steam storage tank 41. The second steam enters and exits the steam storage tank 41 for temporary storage after gas-liquid separation in the second separator 40; the outlet of the steam storage tank 41 is connected to the kettle body 1 through the above-mentioned first circuit 6. The steam storage tank 41 is provided with a second pressure detector 410 and a third temperature detector 411, which are used to detect the temperature and pressure in the steam storage tank 41, and control the operating status of each component through parameters such as temperature and pressure. The steam storage tank 41 is provided with a pressure relief valve 412. When the pressure in the steam storage tank 41 exceeds the preset pressure, the pressure relief valve 412 opens to relieve pressure.

[0070] Specifically, the specifications of the kettle body 1 can be selected according to actual needs. In this embodiment, the steam volume in the kettle body 1 is 120m 3 .

[0071] Specifically, the evaporator 20 is a vertical shell and tube evaporator 20 made of 304 stainless steel, and the heat exchange area of ​​the evaporator 20 is 10-15m 2 , the conductivity of saturated pure water in the evaporator 20 is 2 μS / cm.

[0072] Specifically, the axial flow velocity of steam in the first separator 21 and the second separator 40 is controlled to be below 1 m / s.

[0073] Specifically, the water spray buffer storage time of the water spray tank 310 is preferably 15-30 minutes, the flow range of the water spray pump 311 is 100-300L / H; the storage buffer time of the steam storage tank 41 is 5-20 minutes.

[0074] The novelty of the present invention is that the exhaust steam in the kettle 1 can be heat exchanged with saturated pure water through the heat exchange purification module 2, and the saturated pure water absorbs the waste heat of the exhaust steam and increases its temperature to become a new first steam without impurities. The first steam is compressed and enthalpy increased through the compression enthalpy increase module 3 to increase the pressure and temperature of the first steam to form a second steam. The second steam is stored through the steam energy storage module 4 and can be reused as a heat source steam. In this way, the heat in the kettle 1 can be fully recycled and utilized, and impurities in the exhaust steam can be removed through heat exchange, thereby ensuring the quality of the products in subsequent production.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat recovery system for autoclave curing kettle, characterized in that: include: Kettle body (1); A heat exchange purification module (2) is connected to the kettle body (1) through a first passage (5) and is used for exchanging heat with the exhaust steam in the kettle body (1) to obtain pure first steam; A compression and enthalpy-increasing module (3), connected to the heat exchange and purification module (2), and used for compressing and enthalpy-increasing the first steam to obtain a second steam; The steam energy storage module (4) is connected to the compression enthalpy increase module (3) and is connected to the kettle body (1) via a first loop (6), and is used for storing the second steam and returning the second steam to the kettle body (1).

2. The heat recovery system for autoclave curing kettle according to claim 1, characterized in that: A second circuit (7) and a second passage (8) are connected between the heat exchange purification module (2) and the kettle body (1); The second circuit (7) is used to supply condensed water after heat exchange in the heat exchange purification module (2) to flow back to the kettle body (1); The second passage (8) is used to return the condensed water in the kettle (1) to the heat exchange purification module (2) for heat exchange to obtain the first steam.

3. The heat recovery system for autoclave curing kettle according to claim 2, characterized in that: At least two kettle bodies (1) are provided, and the first circuit (6) is connected to the plurality of kettle bodies (1) respectively through branches.

4. The heat recovery system for autoclave curing kettle according to claim 3, characterized in that: The heat exchange purification module (2) comprises: an evaporator (20), used for exchanging heat with the heat in the kettle (1) and generating steam; a first separator (21), connected to the evaporator (20), and used for performing gas-liquid separation on the steam generated by the evaporator (20); The filter (22) is connected to the first separator (21) and is used to remove liquid droplets entrained in the steam to form the first steam.

5. The heat recovery system for autoclave curing kettle according to claim 4, characterized in that: The first separator (21) is connected to the evaporator (20) via a third loop (23) for allowing the liquid phase in the first separator (21) to flow back to the evaporator (20) for evaporation.

6. The autoclave heat recovery system according to any one of claims 1 to 5, characterized in that: It also comprises a negative pressure piece, which is connected to the kettle body (1) through a third passage (9).

7. The autoclave heat recovery system according to claim 6, characterized in that: The compression enthalpy increase module (3) comprises: A compressor (30) for compressing the first steam to increase enthalpy and form the second steam; A water spray cooling component (31) is used for spraying and cooling the compressor (30).

8. The heat recovery system for autoclave curing kettle according to claim 7, characterized in that: The water spray cooling component (31) comprises a water spray tank (310) and a water spray pump (311); the water spray tank (310) is used to contain cooling water, and the water spray pump (311) is used to extract cooling water in the water spray tank (310) to spray the compressor (30).

9. The autoclave heat recovery system according to claim 7, characterized in that: The compressor (30) also has an air extraction function to form the negative pressure member, and the kettle body (1) is connected to the compressor (30) through the third passage (9).

10. The heat recovery system for autoclave curing kettle according to claim 7, characterized in that: The steam energy storage module (4) comprises: a second separator (40), connected to the compressor (30), for performing gas-liquid separation on the second steam; A steam storage tank (41) has an air inlet connected to the second separator (40) for storing the second steam, and an air outlet connected to the kettle (1) through the first circuit (6) for releasing the second steam into the kettle (1).

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