White spirit brewing high-temperature cooking waste heat recovery system

Abstract

The invention relates to the technical field of high-efficiency recovery of low-temperature exhaust gas, in particular to a high-temperature cooking waste heat recovery system for white spirit brewing. The white spirit brewing high-temperature cooking waste heat recovery system comprises a cooking barrel, a compressor, an embedded plate heat exchanger, a condensate water tank and a circulating pump, a liquid inlet of the cooking barrel is communicated with one end of a water supplementing pipe, an air inlet of the compressor is communicated with a waste gas outlet of the cooking barrel, and the compressor is used for compressing steam to obtain high-temperature and high-pressure steam. A steam inlet of the embedded plate heat exchanger is communicated with an air outlet of the compressor, and a steam outlet of the embedded plate heat exchanger is communicated with a steam inlet of the cooking barrel through a steam conveying pipe. By adopting the arrangement mode, waste heat steam is utilized twice to recover heat, high-efficiency energy utilization can be realized, energy consumption and carbon emission are reduced, and meanwhile, the cooking efficiency and the grain quality are improved.

Description

Technical Field

[0001] This invention relates to the field of low-temperature gas recovery technology, and in particular to a high-temperature cooking waste heat recovery system for baijiu brewing. Background Technology

[0002] The Baijiu brewing high-temperature cooking waste heat recovery system is a waste heat recovery system based on the MVC evaporation system that recovers and utilizes a large amount of low-temperature waste heat generated during the high-temperature cooking process of Baijiu brewing to achieve energy conservation and emission reduction.

[0003] High-temperature steaming can transfer the required materials from a low-temperature environment to a high-temperature environment, causing a series of physicochemical reactions to achieve the required usage conditions. During the steaming process, a large amount of low-temperature gas is generated, which still contains a large amount of low-grade heat energy. Directly releasing it would cause great waste of energy and damage the environment and affect aesthetics. Therefore, a single-screw steam compressor is used to compress, heat up and pressurize the low-temperature gas to achieve the purpose of secondary utilization of waste heat. Summary of the Invention

[0004] This invention provides a high-temperature cooking waste heat recovery system for baijiu brewing, which solves the problems of low waste heat utilization rate and high energy consumption, high cost and environmental pollution in the traditional cooking process.

[0005] This invention provides a high-temperature cooking waste heat recovery system for baijiu brewing, comprising: A cooking tank, wherein the liquid inlet of the cooking tank is connected to one end of a water supply pipe; The compressor has an air inlet connected to the exhaust outlet of the cooking tank (1). The compressor is used to compress water vapor to obtain high-temperature and high-pressure steam. An embedded plate heat exchanger is provided, wherein the steam inlet of the embedded plate heat exchanger is connected to the air outlet of the compressor, the steam outlet of the embedded plate heat exchanger is connected to the steam inlet of the cooking tank via a steam delivery pipe, and the liquid inlet of the embedded plate heat exchanger is connected to the liquid outlet of the cooking tank via a condensate drain pipe. The embedded plate heat exchanger is used to exchange heat between the high-temperature, high-pressure steam generated by the compressor and the high-temperature condensate generated by the cooking tank, so that the high-temperature condensate is converted into high-temperature steam to heat and cook the cooking tank. A condensate tank, wherein the inlet of the condensate tank is connected to the outlet of the embedded plate heat exchanger; A circulating pump, the inlet of which is connected to the outlet of the condensate tank, and the outlet of which is connected to the other end of the water supply pipe.

[0006] The high-temperature cooking waste heat recovery system for baijiu brewing provided by the present invention further includes: A tube sheet heat exchanger is provided, wherein the exhaust gas inlet of the tube sheet heat exchanger is connected to the exhaust gas outlet of the cooking tank via a waste heat steam pipeline, and the liquid inlet of the tube sheet heat exchanger is connected to a water supply pipeline via a liquid inlet branch; the air inlet of the compressor is connected to the steam outlet of the tube sheet heat exchanger, and the tube sheet heat exchanger is used to exchange the waste heat generated by the exhaust gas from the cooking tank with high-temperature condensate or water supply to generate steam; A plate preheater, wherein the first inlet of the plate preheater is connected to the outlet of the tube sheet heat exchanger, the second inlet of the plate preheater is connected to the makeup water pipeline, the first outlet of the plate preheater is connected to the wastewater pipeline, and the second outlet of the plate preheater is connected to the other end of the makeup water pipeline and one end of the makeup water pipeline; the plate preheater is used to exchange heat between the high-temperature wastewater and the makeup water input through the makeup water pipeline to raise the temperature of the makeup water to a predetermined temperature.

[0007] The high-temperature cooking waste heat recovery system for baijiu brewing provided by the present invention further includes: A gas-liquid separator is provided, wherein the inlet of the gas-liquid separator is connected to the steam outlet of the tube sheet heat exchanger, the outlet of the gas-liquid separator is connected to the inlet of the compressor, and the liquid outlet of the gas-liquid separator is connected to the water supply pipe through a liquid drainage channel; the gas-liquid separator is used to separate liquid water from water vapor in the water vapor generated by the tube sheet heat exchanger.

[0008] The high-temperature cooking waste heat recovery system for baijiu brewing provided by the present invention further includes: A steam storage tank, wherein the inlet of the steam storage tank is connected to the outlet of the compressor, and the outlet of the steam storage tank is connected to the steam inlet of the embedded plate heat exchanger through a first pneumatic regulating valve, and the steam storage tank is used to store high-temperature and high-pressure steam.

[0009] The invention provides a high-temperature cooking waste heat recovery system for baijiu brewing according to the present invention, which further includes: A water spray pump, wherein the inlet of the water spray pump is connected to the outlet of the condensate tank, and the outlet of the water spray pump is connected to the condensate inlet of the compressor.

[0010] According to the present invention, a high-temperature cooking waste heat recovery system for baijiu brewing is provided, wherein the compressor is a single-screw steam compressor.

[0011] The high-temperature cooking waste heat recovery system for baijiu brewing provided by the present invention further includes: The second pneumatic regulating valve is connected in series on the waste heat steam pipeline.

[0012] The high-temperature cooking waste heat recovery system for baijiu brewing provided by the present invention further includes: The three-way valve has a first port connected to the second liquid outlet of the plate preheater, a second port connected to the other end of the water supply pipe, and a third port connected to one end of the water supply pipe.

[0013] The high-temperature cooking waste heat recovery system for baijiu brewing provided by the present invention further includes: The first check valve is connected in series at one end of the water supply pipe.

[0014] The high-temperature cooking waste heat recovery system for baijiu brewing provided by the present invention further includes: A second check valve is connected in series in the liquid discharge channel.

[0015] The high-temperature cooking waste heat recovery system for baijiu brewing provided by this invention involves waste heat steam generated in the cooking tank exchanging heat with preheated high-temperature makeup water in a tube sheet heat exchanger to provide a heat source for the makeup water. After heat exchange, the steam is converted into waste heat and enters a plate preheater to preheat the makeup water. The preheated high-temperature makeup water then passes through the tube sheet heat exchanger to produce a fresh vapor-liquid mixture, which is then separated in a gas-liquid separator to obtain saturated pure steam. This saturated pure steam is then compressed in a compressor to obtain high-temperature, high-pressure steam. This configuration achieves two-stage utilization of waste heat steam to recover heat, enabling high-efficiency energy utilization, reducing energy consumption and carbon emissions, while simultaneously improving cooking efficiency and grain quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is one of the structural schematic diagrams of the high-temperature cooking waste heat recovery system for liquor brewing provided by the present invention.

[0018] Figure 2 yes Figure 1 One of the magnified structural diagrams in the image.

[0019] Figure 3 yes Figure 1 The second enlarged schematic diagram of the structure.

[0020] Figure 4 yes Figure 1 The third part of the enlarged structural diagram.

[0021] Figure 5 yes Figure 1 The fourth part of the enlarged structural diagram.

[0022] Figure 6 This is the second schematic diagram of the waste heat recovery system for high-temperature cooking in liquor brewing provided by the present invention.

[0023] Figure label: 1. Cooking tank; 2. Compressor; 3. Gas-liquid separator; 4. Embedded plate heat exchanger; 5. Tube-plate heat exchanger; 6. Plate preheater; 7. Circulating pump; 8. Second pneumatic regulating valve; 9. Second check valve; 10. First check valve; 11. Steam storage tank; 12. First pneumatic regulating valve; 13. Three-way valve; 14. Water spray pump; 15. Condensate tank; 100. Water supply pipe; 101. Waste heat steam pipeline; 111. Steam delivery pipe; 112. Condensate drain pipe; 115. Wastewater pipeline; 116. Water supply pipeline; 117. Liquid inlet branch; 118. Water supply pipe; 119. Liquid drainage channel. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0027] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] like Figure 6 As shown, the high-temperature cooking waste heat recovery system for baijiu brewing includes a cooking tank 1, a compressor 2, an embedded plate heat exchanger 4, a condensate tank 15, and a circulating pump 7. The liquid inlet of the cooking tank 1 is connected to one end of a water supply pipe 100, and the air inlet of the compressor 2 is connected to the exhaust outlet of the cooking tank 1. The compressor 2 is used to compress water vapor to obtain high-temperature and high-pressure steam. The steam inlet of the embedded plate heat exchanger 4 is connected to the air outlet of the compressor 2, and the steam outlet of the embedded plate heat exchanger 4 is connected to the steam inlet of the cooking tank 1 through a steam delivery pipe 111. The liquid inlet of the embedded plate heat exchanger 4 is connected to the liquid outlet of the cooking tank 1 through a condensate drain pipe 112. The embedded plate heat exchanger 4 is used to exchange heat between the high-temperature and high-pressure steam generated by the compressor 2 and the high-temperature condensate generated by the cooking tank 1, so that the high-temperature condensate is converted into high-temperature steam to heat and cook the cooking tank 1.

[0030] The inlet of the condensate tank 15 is connected to the outlet of the embedded plate heat exchanger 4, and the inlet of the circulating pump 7 is connected to the outlet of the condensate tank 15. The outlet of the circulating pump 7 is connected to the other end of the water supply pipe 100. The high-temperature cooking waste heat recovery system for liquor brewing provided by this invention involves waste heat steam generated in the cooking tank 1 exchanging heat with preheated high-temperature makeup water in the tube sheet heat exchanger 5 to provide a heat source for the high-temperature makeup water. After heat exchange, the steam is converted into waste heat and enters the plate preheater 6 to preheat the makeup water. The preheated high-temperature makeup water then passes through the tube sheet heat exchanger 5 to generate a fresh vapor-liquid mixture, which is then separated in the gas-liquid separator 3 to obtain saturated pure steam. This steam is then compressed in the compressor 2 to obtain high-temperature, high-pressure steam. This configuration achieves two uses of waste heat steam to recover heat, saving more than 70% compared to traditional boiler cooking steam. It enables high-efficiency energy utilization, reduces energy consumption and carbon emissions, and simultaneously improves cooking efficiency and grain quality.

[0031] In one embodiment of the present invention, such as Figure 1 As shown, the exhaust gas inlet of the tube sheet heat exchanger 5 is connected to the exhaust gas outlet of the cooking tank 1 through the waste heat steam pipeline 101, and the liquid inlet of the tube sheet heat exchanger 5 is connected to the water supply pipeline 118 through the liquid inlet branch 117; the air inlet of the compressor 2 is connected to the steam outlet of the tube sheet heat exchanger 5. The tube sheet heat exchanger 5 is used to exchange heat between the waste heat (80℃ waste heat) generated by the cooking tank 1 and the high-temperature condensate (70℃ high-temperature condensate) or the water supply to generate steam (70℃ fresh steam).

[0032] The first inlet of the plate preheater 6 is connected to the outlet of the tube sheet heat exchanger 5, the second inlet of the plate preheater 6 is connected to the water supply pipeline 116, the first outlet of the plate preheater 6 is connected to the wastewater pipeline 115, and the second outlet of the plate preheater 6 is connected to the other end of the water supply pipeline 100 and one end of the water supply pipeline 118. The plate preheater 6 is used to exchange heat between the high-temperature wastewater and the water supply input through the water supply pipeline 116 to raise the temperature of the water supply to a predetermined temperature (70°C).

[0033] In one embodiment of the present invention, such as Figure 1As shown, the high-temperature cooking waste heat recovery system for baijiu brewing also includes a gas-liquid separator 3. The inlet of the gas-liquid separator 3 is connected to the steam outlet of the tube sheet heat exchanger 5, and the outlet of the gas-liquid separator 3 is connected to the inlet of the compressor 2. The outlet of the gas-liquid separator 3 is connected to the water supply pipe 118 through a liquid drainage channel 119. The condensate generated by the gas-liquid separator 3 is transported to the water supply pipe 118 through the liquid drainage channel 119. The gas-liquid separator 3 is used to separate liquid water from water vapor in the steam generated by the tube sheet heat exchanger 5. By effectively removing liquid water droplets from the water vapor through the gas-liquid separator 3, liquid droplets are prevented from entering the compressor 2 and causing liquid slugging, reducing the equipment failure rate, extending the service life of the compressor 2, and improving the compression efficiency, ensuring a stable output of subsequent high-temperature and high-pressure steam.

[0034] In one embodiment of the present invention, such as Figure 1 As shown, the high-temperature cooking waste heat recovery system for baijiu brewing also includes a steam storage tank 11. The inlet of the steam storage tank 11 is connected to the outlet of the compressor 2, and the outlet of the steam storage tank 11 is connected to the steam inlet of the embedded plate heat exchanger 4 through the first pneumatic regulating valve 12. The outlet of the circulating pump 7 is connected to the other end of the water supply pipe 118. The steam storage tank 11 is used to store high-temperature and high-pressure steam to avoid steam waste. In addition, setting up the steam storage tank 11 has the following two advantages: First, the steam storage tank 11 can buffer and store the high-temperature and high-pressure steam output by the compressor 2, and quickly release the steam when the cooking load suddenly increases, avoiding frequent start-stop of the compressor 2, ensuring continuous and stable operation of the cooking tank 1, and improving the consistency of grain quality. Second, by balancing the fluctuations in steam supply and demand through the steam storage tank 11, the compressor 2 can operate at a constant speed in the high-efficiency range, reducing loading and unloading cycles, improving the overall power saving rate by 8%–12%, and extending the service life of the compressor 2 and valves. The high-temperature and high-pressure steam output by compressor 2 is first stored in steam storage tank 11. When needed, the opening degree and duration of the first pneumatic regulating valve 12 are adjusted to control the steam flow rate that exchanges heat with the heat exchanger in the cooking tank 1, thereby achieving precise temperature control.

[0035] In one embodiment of the present invention, the high-temperature cooking waste heat recovery system for baijiu brewing further includes a condensate tank 15 and a circulating pump 7. The inlet of the condensate tank 15 is connected to the outlet of the embedded plate heat exchanger 4, and the condensate tank 15 is used to store the condensate output from the embedded plate heat exchanger 4. The inlet of the circulating pump 7 is connected to the outlet of the condensate tank 15, and the outlet of the circulating pump 7 is connected to the other end of the water supply pipe 118. The circulating pump 7 is used to transport the condensate in the condensate tank 15 to the tube sheet heat exchanger 5 to exchange heat with the waste heat steam, thereby generating water vapor. In this embodiment, the heat exchange system uses water as the working fluid, eliminating the risk of leakage and pollution.

[0036] In one embodiment of the present invention, such as Figure 1 As shown, the high-temperature cooking waste heat recovery system for baijiu brewing also includes a water spray pump 14. The inlet of the water spray pump 14 is connected to the outlet of the condensate tank 15, and the outlet of the water spray pump 14 is connected to the condensate inlet of the compressor 2. The water spray pump 14 is used to transport the condensate in the condensate tank 15 to the compressor 2 for cooling. By using the low-temperature and clean condensate in the condensate tank 15 to directly spray and cool the compressor 2, the exhaust temperature and bearing temperature of the compressor 2 are effectively reduced, preventing overheating protection shutdown and ensuring long-term stable operation of the single-screw steam compressor under high-temperature and high-load conditions.

[0037] In one embodiment of the present invention, the compressor 2 is a single-screw steam compressor. The single-screw steam compressor has low noise and vibration, high pressure ratio, and is suitable for steam compression and exhaust temperatures of 100~120℃.

[0038] In one embodiment of the present invention, such as Figure 1 As shown, the high-temperature cooking waste heat recovery system for baijiu brewing also includes a second pneumatic regulating valve 8, which is connected in series with the waste heat steam pipeline 101. The second pneumatic regulating valve 8 is used to regulate the flow rate of waste heat steam in the waste heat steam pipeline 101. By setting the second pneumatic regulating valve 8, the system can achieve precise dynamic regulation of the waste heat steam flow rate, avoiding the problems of response lag and low regulation accuracy caused by traditional fixed pipe diameter or manual valve regulation. When the cooking load fluctuates or the process parameters change, the second pneumatic regulating valve 8 can automatically adjust its opening according to the real-time monitored temperature and pressure signals, ensuring that the waste heat steam enters the tube sheet heat exchanger 5 at the optimal flow rate. This prevents the heat exchanger from being overloaded and the condensation efficiency from decreasing due to excessive steam flow, and also prevents insufficient waste heat recovery due to insufficient flow.

[0039] In one embodiment of the present invention, such as Figure 1 As shown, the high-temperature cooking waste heat recovery system for baijiu brewing also includes a three-way valve 13. The first port of the three-way valve 13 is connected to the second liquid outlet of the plate preheater 6, the second port of the three-way valve 13 is connected to the other end of the water supply pipe 100, and the third port of the three-way valve 13 is connected to one end of the water supply pipeline 118. The three-way valve 13 is used to regulate the amount of water entering the water supply pipe 100 and the amount of water entering the water supply pipeline 118, thereby stabilizing the system temperature, pressure, and liquid level.

[0040] In one embodiment of the present invention, such as Figure 1As shown, the high-temperature cooking waste heat recovery system for baijiu brewing also includes a first check valve 10, which is connected in series to one end of the water supply pipe 118. The first check valve 10 is used to prevent condensate in the water supply pipe 118 from entering the tube sheet heat exchanger 5 or the water supply pipe 100. Specifically, the one-way shut-off function of the first check valve 10 can effectively prevent high-temperature condensate from flowing back when the system is shut down or when the pressure fluctuates, avoiding condensate backflow into the tube sheet heat exchanger 5, which would cause a decrease in heat exchange efficiency or the risk of water hammer; at the same time, it prevents the water in the low-temperature water supply pipe 100 from mixing with the high-temperature condensate, ensuring stable water supply temperature and reducing thermal stress damage to the cooking tank 1 caused by sudden temperature changes.

[0041] In one embodiment of the present invention, the waste heat recovery system for high-temperature cooking in liquor brewing further includes a second check valve 9, which is connected in series with the liquid drainage channel 119. The second check valve 9 is used to prevent condensate in the water supply pipe 118 from entering the gas-liquid separator 3.

[0042] In one specific embodiment of the present invention, such as Figure 2 As shown, the water level in the cooking tank 1 during the cooking process is observed to determine whether water is added through the water supply pipe 100. The water supplied by the water supply pipe 100 is preheated by the plate preheater 6, which increases the temperature of the water and prevents the temperature fluctuation during the cooking process from being too large due to the use of low-temperature water supply.

[0043] Waste heat generated during the cooking process is discharged through waste heat steam pipe 101. The steam heat source in the heating chamber is transported to the inner liner of the cooking tank 1 via steam delivery pipe 111 for integrated side and bottom heating. The heating chamber contains a 3 / 4 level aqueous solution (excluding the aqueous solution filling the condensate drain pipe 112). During the cooking process, the steam liquefies through heat exchange, transferring heat to the cooking tank 1 to achieve a heating effect. The liquefied aqueous solution, under the pressure of the steam in the heating chamber, is forced into the condensate drain pipe 112 for circulation. High-temperature steam input from steam storage tank 11 exchanges heat with the high-temperature condensate generated in the cavity of the cooking tank 1 within the embedded plate heat exchanger 4. The liquefied high-temperature condensate enters the condensate tank 15, achieving efficient heat exchange.

[0044] In one specific embodiment of the present invention, such as Figure 3 As shown, the low-temperature steam obtained through gas-liquid separation is input into a single-screw steam compressor. After compression, the steam enthalpy is increased, resulting in high-temperature secondary steam that enters the steam storage tank 11. Excess high-temperature gas from the compression process is stored to avoid steam waste and allows for reuse. The water spray pump 14 provides water spray protection to prevent the compressor 2 from overheating. By adjusting the opening of the first pneumatic regulating valve 12, the steam flow rate for heat exchange with the heat exchanger inside the cooking tank 1 is controlled, achieving temperature and time control.

[0045] In one specific embodiment of the present invention, such as Figure 4 As shown, the waste heat generated during the cooking process enters the tube sheet heat exchanger 5 through the waste heat steam pipeline 101. It exchanges heat with the high-temperature condensate input through the liquid inlet branch 117 in the tube sheet heat exchanger 5. The latent heat of liquefaction of the waste heat generates a large amount of heat, which is transferred to the high-temperature condensate. The high-temperature condensate is converted into a gas-liquid mixture and enters the gas-liquid separator 3. The waste heat output from the liquid outlet of the tube sheet heat exchanger 5 exchanges heat with the condensate introduced through the water supply pipe 100 through the plate preheater 6, absorbing heat from the waste heat again. It is then discharged through the wastewater pipeline 115. The preheated condensate enters the water supply pipe 100 and the water supply pipeline 118 through the three-way valve 13, respectively, to replenish water for the cooking tank 1 and the water supply pipeline 118, thereby realizing the purpose of recovering heat by utilizing the waste heat steam twice.

[0046] In one specific embodiment of the present invention, such as Figure 5 As shown, the gas-liquid mixture generated by heat exchange through the tube sheet heat exchanger 5 enters the gas-liquid separator 3 for separation. The obtained saturated steam is compressed and heat exchanged by the compressor 2, while the condensate generated by liquefaction is circulated back into the tube sheet heat exchanger 5 by the circulating pump 7 to form a closed loop. The liquid separated by the gas-liquid separator 3 enters the water supply pipe 118, and is combined with the condensate transported by the circulating pump 7 and the condensate transported by the three-way valve 13 to be transported to the tube sheet heat exchanger 5 through the liquid inlet branch 117.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-temperature cooking waste heat recovery system for baijiu (Chinese liquor) brewing, characterized in that, include: A cooking tank (1), wherein the liquid inlet of the cooking tank (1) is connected to one end of a water supply pipe (100); The compressor (2) has its air inlet connected to the exhaust outlet of the cooking tank (1). The compressor (2) is used to compress water vapor to obtain high-temperature and high-pressure steam. An embedded plate heat exchanger (4) is provided. The steam inlet of the embedded plate heat exchanger (4) is connected to the outlet of the compressor (2). The steam outlet of the embedded plate heat exchanger (4) is connected to the steam inlet of the cooking tank (1) through a steam conveying pipe (111). The liquid inlet of the embedded plate heat exchanger (4) is connected to the liquid outlet of the cooking tank (1) through a condensate drain pipe (112). The embedded plate heat exchanger (4) is used to exchange heat between the high-temperature and high-pressure steam generated by the compressor (2) and the high-temperature condensate generated by the cooking tank (1), so that the high-temperature condensate is converted into high-temperature steam to heat and cook the cooking tank (1). Condensate tank (15), the inlet of the condensate tank (15) is connected to the outlet of the embedded plate heat exchanger (4); The circulation pump (7) has its inlet connected to the outlet of the condensate tank (15), and its outlet connected to the other end of the water supply pipe (100).

2. The high-temperature cooking waste heat recovery system for Baijiu brewing according to claim 1, characterized in that, Also includes: The tube sheet heat exchanger (5) has its exhaust gas inlet connected to the exhaust gas outlet of the cooking tank (1) via a waste heat steam pipeline (101), and its liquid inlet connected to a water supply pipeline (118) via a liquid inlet branch (117); the air inlet of the compressor (2) is connected to the steam outlet of the tube sheet heat exchanger (5), and the tube sheet heat exchanger (5) is used to exchange the waste heat generated by the exhaust gas from the cooking tank (1) with high-temperature condensate or water supply to generate steam. The plate preheater (6) has its first inlet connected to the outlet of the tube sheet heat exchanger (5), its second inlet connected to the water supply pipeline (116), its first outlet connected to the wastewater pipeline (115), and its second outlet connected to the other end of the water supply pipe (100) and one end of the water supply pipeline (118). The plate preheater (6) is used to exchange heat between the high-temperature wastewater and the water supply input through the water supply pipeline (116) to raise the temperature of the water supply to a predetermined temperature.

3. The high-temperature cooking waste heat recovery system for Baijiu brewing according to claim 2, characterized in that, Also includes: The gas-liquid separator (3) has an inlet connected to the steam outlet of the tube sheet heat exchanger (5), an outlet connected to the inlet of the compressor (2), and a liquid outlet connected to the water supply pipe (118) via a liquid drainage channel (119). The gas-liquid separator (3) is used to separate liquid water from water vapor in the water vapor generated by the tube sheet heat exchanger (5).

4. The high-temperature cooking waste heat recovery system for Baijiu brewing according to claim 3, characterized in that, Also includes: A steam storage tank (11) is provided. The inlet of the steam storage tank (11) is connected to the outlet of the compressor (2). The outlet of the steam storage tank (11) is connected to the steam inlet of the embedded plate heat exchanger (4) through the first pneumatic regulating valve (12). The steam storage tank (11) is used to store high-temperature and high-pressure steam. The outlet of the circulating pump (7) is connected to the other end of the water supply pipe (118).

5. The high-temperature cooking waste heat recovery system for Baijiu brewing according to claim 4, characterized in that, Also includes: The water spray pump (14) has its inlet connected to the outlet of the condensate tank (15), and its outlet connected to the condensate inlet of the compressor (2).

6. The high-temperature cooking waste heat recovery system for liquor brewing according to any one of claims 1 to 5, characterized in that, The compressor (2) is a single-screw steam compressor (2).

7. The high-temperature cooking waste heat recovery system for liquor brewing according to any one of claims 1 to 5, characterized in that, Also includes: The second pneumatic regulating valve (8) is connected in series to the waste heat steam pipeline (101).

8. The high-temperature cooking waste heat recovery system for liquor brewing according to any one of claims 1 to 5, characterized in that, Also includes: Three-way valve (13), the first port of the three-way valve (13) is connected to the second liquid outlet of the plate preheater (6), the second port of the three-way valve (13) is connected to the other end of the water supply pipe (100), and the third port of the three-way valve (13) is connected to one end of the water supply pipe (118).

9. The high-temperature cooking waste heat recovery system for Baijiu brewing according to claim 8, characterized in that, Also includes: The first check valve (10) is connected in series at one end of the water supply pipe (118).

10. The high-temperature cooking waste heat recovery system for baijiu brewing according to any one of claims 2 to 5, characterized in that, Also includes: The second check valve (9) is connected in series in the liquid discharge channel (119).

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