Grain moistening water tank utilizing grain steaming dead steam heat recovery for auxiliary heating

Abstract

The utility model discloses a grain moistening water tank utilizing grain steaming dead steam heat recovery for auxiliary heating, which comprises a tank body, a water inlet pipe, a steam inlet pipe and a steam injection pipe, the water inlet pipe and the steam inlet pipe are arranged on the tank body, the steam injection pipe is arranged in the tank body and connected with the steam inlet pipe, the steam injection pipe is provided with at least one row of steam injection holes, and a grain moistening water outlet pipe is arranged at the lower end of the tank body. A plate-shell type heat exchange device is arranged in the box body and comprises a shell and a heat exchange core installed in the shell, a plate pass flow channel is formed in the heat exchange core, and a shell pass flow channel isolated from the plate pass flow channel is formed between the heat exchange core and the shell. A plurality of heat exchange pipes which are distributed at intervals, all communicated with the shell pass flow channel and used for heating water in the box body in an auxiliary mode are arranged on the outer side of the shell, the heat exchange pipes are connected with a grain steaming dead steam heat recovery inlet pipe, a condensation pipe communicated with the shell pass flow channel is arranged on the lower side of the shell, and a medium inlet pipe and a medium outlet pipe which are communicated with the plate pass flow channel are arranged on the outer side of the shell.

Description

Technical field:

[0001] The utility model relates to the technical field of wine brewing, in particular to a grain-moistening water tank which utilizes heat recovery of exhaust steam from grain steaming for auxiliary heating. Background technology:

[0002] It is understood that the brewing process of Maotai-flavor liquor mainly consists of koji making, brewing, aging, and blending. Grain moistening is a relatively important part of the brewing process. Before steaming and cooking, the sorghum that has been appropriately crushed by the brewing masters must be moistened with grain water. After moistening, the sorghum grains expand, laying the foundation for subsequent steaming and gelatinization. Brewing masters said that grain moistening can not only allow the starch granules in the sorghum to absorb enough water, but also remove some substances that are prone to produce astringency during brewing, which plays a role in improving the quality of the wine.

[0003] Grain moistening process requirements: The temperature of the water used for moistening the grain should be ≥95~100℃. Before moistening the grain, prepare the expected amount of water for each moistening. When the water temperature is greater than 95℃, the grain can be moistened. Pour the accurately measured moistening water into the grain pile so that all the sorghum absorbs water evenly. The higher the temperature of the moistening water, the better the moistening effect.

[0004] The Chinese utility model patent with patent number CN202122617650.9 discloses a grain distribution water tank, which includes a tank body, a water inlet pipe arranged at the upper end of the tank body, a steam inlet pipe vertically arranged at the tank body, a steam injection pipe horizontally arranged inside the tank body and connected to the lower end of the steam inlet pipe, and a pressurized exhaust pipe arranged at the upper end of the tank body and a grain distribution water outlet arranged at the lower end of the tank body, the upper end of the steam inlet pipe also passes through the upper end of the tank body to extend out of the upper end surface of the tank body, and the steam injection pipe is provided with at least one row of steam injection holes for steam injection; a liquid level gauge is provided on the outside of the tank body, the upper end of the liquid level gauge is connected to the upper part of the inner cavity of the tank body, and the lower end of the liquid level gauge is connected to the lower part of the inner cavity of the tank body.

[0005] However, the above-mentioned grain water tank only uses a steam injection pipe to heat the water in the tank, which takes a long time and is not efficient. At the same time, during the winemaking process, waste steam is generated during the cooking of grain, and direct discharge of the waste steam will lead to a waste of energy. How to recover and utilize the waste steam, and use the waste steam to assist in heating the water in the grain water tank, is the main technical problem that the utility model needs to solve.

[0006] In view of this, the inventor proposes the following technical solution. Utility model content:

[0007] The utility model aims to overcome the deficiencies of the prior art and provide a grain-moistening water tank which utilizes the heat recovery of grain steam exhaust steam for auxiliary heating.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions: a grain-moistening water tank for auxiliary heating by utilizing heat recovery of exhaust steam from grain steaming comprises a tank body, a water inlet pipe and a steam inlet pipe arranged on the tank body, a steam injection pipe arranged in the tank body and connected to the steam inlet pipe, the steam injection pipe is provided with at least one row of steam injection holes for steam injection, a grain-moistening water outlet pipe is provided at the lower end of the tank body, a plate-shell heat exchange device is also provided in the tank body, the plate-shell heat exchange device comprises a shell body and a heat exchange core installed in the shell body, the heat exchange core has a plate-pass flow channel inside, A shell-side flow channel isolated from the plate-side flow channel is formed between the heat exchange core and the shell. A plurality of heat exchange tubes are arranged on the outside of the shell, which are distributed at intervals and connected to the shell-side flow channel and are used to assist in heating the water in the box. The plurality of heat exchange tubes are connected to a grain steam exhaust heat recovery inlet pipe. A condenser connected to the shell-side flow channel is arranged on the lower side of the shell. A medium inlet pipe connected to the plate-side flow channel and a medium outlet pipe for recovering hot water are also arranged on the outside of the shell. The ends of the condenser, the medium inlet pipe, the medium outlet pipe and the grain steam exhaust heat recovery inlet pipe extend out of the box.

[0009] Furthermore, in the above technical solution, an exhaust pipe connected to the shell-side flow channel and used to discharge gas is provided on the upper side of the shell, and the end of the exhaust pipe extends out of the box body, and a bent pipe is also connected to the outside of the end of the exhaust pipe, and the end of the bent pipe is also connected to the upper end face of the box body, so that the end of the exhaust pipe is also connected to the upper inner wall of the box body through the bent pipe.

[0010] Furthermore, in the above technical solution, the heat exchange tube is a corrugated tube, the inner wall of which is formed with a plurality of first annular grooves distributed at intervals, and the outside of the heat exchange tube is formed with a first annular convex portion at a position corresponding to the first annular groove.

[0011] Furthermore, in the above technical solution, a plurality of the heat exchange tubes are connected to an end shell, and the end shell is conical, and a smaller end thereof is connected to the grain steam exhaust steam heat recovery inlet pipe.

[0012] Furthermore, in the above technical solution, there are two inlet pipes for heat recovery from exhaust steam from grain steaming, which are distributed on both sides of the plate and shell heat exchange device, and each inlet pipe for heat recovery from exhaust steam from grain steaming is connected to an end shell, which is connected to a group of first heat exchange tubes, and the two groups of first heat exchange tubes are respectively connected to both sides of the shell.

[0013] Furthermore, in the above technical solution, a first support plate and a second support plate are respectively arranged on both sides of the upper end of the heat exchange core, and a third support plate and a fourth support plate are respectively arranged on both sides of the lower end of the heat exchange core. The first support plate and the second support plate, the third support plate and the fourth support plate are all connected to the inner wall of the shell, so that a gap is formed between the periphery of the heat exchange core and the shell.

[0014] Furthermore, in the above technical solution, a siphon plate is also provided in the box body, which divides the inner cavity of the box body into a conventional heating zone and a rapid heating zone through the siphon plate, and a boiling water circulation interval is provided between the upper end of the siphon plate and the upper inner wall of the box body, the conventional heating zone and the upper end of the rapid heating zone are connected through the boiling water circulation interval, and the lower end of the siphon plate is provided with a siphon port for sucking low-temperature hot water from the conventional heating zone into the rapid heating zone, the steam injection pipe is placed in both the conventional heating zone and the rapid heating zone, and the heat exchange tube is placed in the rapid heating zone.

[0015] Furthermore, in the above technical solution, the siphon plate is in an inverted L shape, which includes a vertical plate fixed in the box body and a guide plate arranged at the upper end of the vertical plate and perpendicular or inclined relative to the vertical plate, and the guide plate extends into the conventional heating zone.

[0016] Furthermore, in the above technical solution, a hot water pipe is also provided on the condenser, the hot water pipe is connected to the bottom of the box, and the hot water pipe is also provided with a first control valve for controlling whether it is connected to the condenser.

[0017] Furthermore, in the above technical solution, an L-shaped overflow pipe is also provided on the outside of the exhaust pipe, and the end of the overflow pipe extends upward to the top of the inner cavity of the box.

[0018] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: when working, the high-temperature cooking exhaust steam generated in the process of steaming grains is recovered and passed into the heat recovery inlet pipe of the steaming exhaust steam, and then enters the heat exchange tube in the plate and shell heat exchange device, and the high-temperature cooking exhaust steam directly exchanges heat with the water in the box through the heat exchange tube, so that the high-temperature cooking exhaust steam can heat the water in the box, so as to achieve the purpose of recovering the high-temperature steaming exhaust steam to assist in heating the water, so that when the steam injection pipe injects steam through the steam injection hole to heat the water in the later stage, the water can be quickly heated to 97-100°C, the heating efficiency is higher, the time is shorter, and the steam input can be saved, and the high-temperature steaming exhaust steam generated in the process of steaming grains can be recycled, which is more environmentally friendly and energy-saving; when the high-temperature steaming exhaust steam passes through the heat exchange tube, it is partially condensed into high-temperature condensed water. And enter the shell-side flow channel, at the same time, the medium inlet pipe is introduced into the cold medium (such as cold water), and the cold medium (such as cold water) enters the plate-side flow channel. At this time, the high-temperature condensed water and the uncondensed high-temperature grain steam exhaust steam are heat exchanged with the cold medium (such as cold water), so that the 25-30°C cold medium (such as cold water) is changed into a hot medium (such as hot water) with a temperature of about 70°C, and flows out from the medium outlet pipe, which can be used for showering water, etc., which can further improve the utilization rate of the high-temperature grain steam exhaust steam and increase the recycling effect; and in this process, not only the high-temperature condensed water can be changed into low-temperature condensed water, but also the uncondensed high-temperature grain steam exhaust steam can be condensed after heat exchange with the cold medium (such as cold water) to form a larger amount of low-temperature condensed water, thereby improving the condensation effect, and at the same time, it can reduce gas emissions, reduce the emission of "white smoke", and improve the environmental quality of winemaking. Description of the drawings:

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 It is a stereogram of another viewing angle of the utility model;

[0021] Figure 3 It is the internal structure diagram of the utility model;

[0022] Figure 4 It is a cross-sectional view of the utility model;

[0023] Figure 5 It is an assembly drawing of the middle plate and shell type heat exchange device of the utility model. Specific implementation method:

[0024] The utility model is further described below in conjunction with specific embodiments and drawings.

[0025] See Figure 1-5 As shown, a grain-moistening water tank is used for auxiliary heating by utilizing the heat recovery of exhaust steam from grain steaming, which is used to heat water to produce grain-moistening water that can moisten the grain.

[0026] Combination Figure 1-5 As shown, the utility model utilizes the heat recovery of exhaust steam from grain steaming to assist in heating, and comprises a grain moistening water tank 1, a water inlet pipe 11 and a steam inlet pipe 21 arranged on the box body 1, a steam injection pipe 2 arranged in the box body 1 and connected to the steam inlet pipe 21, the steam injection pipe 2 is provided with at least one row of steam injection holes 22 for steam injection, and a grain moistening water outlet pipe 12 is provided at the lower end of the box body 1. When working, water is injected into the closed box body 1 through the water inlet pipe 11, and high-temperature steam is introduced through the steam inlet pipe 21, the high-temperature steam is introduced into the steam injection pipe 2, and is ejected from the steam injection holes 22. At this time, the ejected high-temperature steam will be pressurized, and the high-temperature steam can heat the water in the closed box body 1, and heat the water to 97-100°C to form grain moistening water.

[0027] Figure 3-5 As shown, a plate-shell heat exchange device 3 is also arranged in the box body 1, and the plate-shell heat exchange device 3 includes a shell body 31 and a heat exchange core 32 installed in the shell body 31, the heat exchange core 32 has a plate-side flow channel 301 inside, and a shell-side flow channel 302 isolated from the plate-side flow channel 301 is formed between the heat exchange core 32 and the shell body 31, and a plurality of heat exchangers are arranged on the outside of the shell body 31, which are distributed at intervals and are connected to the shell-side flow channel 302 and are used to assist in heating the water in the box body 1. Heat pipe 33, multiple heat exchange pipes 33 are connected to a grain steam exhaust steam heat recovery inlet pipe 34, a condenser 35 connected to the shell side flow channel 302 is arranged on the lower side of the shell 31, and a medium inlet pipe 311 connected to the plate side flow channel 301 and a medium outlet pipe 312 for recovering hot water are also arranged on the outer side of the shell 31; the ends of the condenser 35, the medium inlet pipe 311, the medium outlet pipe 312, and the grain steam exhaust steam heat recovery inlet pipe 34 extend out of the box body 1.

[0028] In order to better recycle the high-temperature exhaust steam generated in the process of steaming grains, the high-temperature exhaust steam is directly recovered and passed into the exhaust steam heat recovery inlet pipe 34, and then enters the heat exchange tube 33 in the plate and shell heat exchange device 3. The high-temperature exhaust steam is directly heat-exchanged with the water in the box body 1 through the heat exchange tube 33, so that the high-temperature exhaust steam can heat the water in the box body 1, so as to achieve the purpose of recycling the high-temperature exhaust steam for auxiliary heating of water, so that when the steam injection pipe 2 injects steam through the steam injection hole 22 to heat the water in the later stage, the water can be quickly heated to 97-100°C, the heating efficiency is higher, the time is shorter, and the steam input can be saved. The high-temperature exhaust steam generated in the process of steaming grains can also be recycled, which is more environmentally friendly and energy-saving; when the high-temperature exhaust steam passes through the heat exchange tube 33, it is partially condensed into high-temperature condensed water and enters the shell side The flow channel 302, at the same time, the medium inlet pipe 311 is passed into the cold medium (such as cold water), and the cold medium (such as cold water) enters the plate flow channel 301. At this time, the high-temperature condensed water and the uncondensed high-temperature grain steam exhaust steam are heat exchanged with the cold medium (such as cold water), so that the 25-30°C cold medium (such as cold water) becomes a hot medium (such as hot water) with a temperature of about 70°C, and flows out from the medium outlet pipe 312, which can be used for shower water, etc., which can further improve the utilization rate of high-temperature grain steam exhaust steam and increase the recycling effect; and in this process, not only can the high-temperature condensed water be converted into low-temperature condensed water, but also the uncondensed high-temperature grain steam exhaust steam can be condensed after heat exchange with the cold medium (such as cold water) to form a larger amount of low-temperature condensed water, improve the condensation effect, and reduce gas emissions, reduce the emission of "white smoke", and improve the environmental quality of winemaking. The condensed water finally formed is discharged from the condensation pipe 35.

[0029] Combination Figure 3-5 As shown, the upper side of the shell 31 is provided with an exhaust pipe 313 which is connected with the shell-side flow channel 302 and is used to discharge the gas, and the end of the exhaust pipe 313 extends out of the box body 1. During operation, since most of the exhaust pipe 313 is placed in the box body 1, only the end of the exhaust pipe 313 extends out of the box body 1. When the high-temperature uncondensed gas is discharged upwardly out of the box body 1 through the exhaust pipe 313, it can also exchange heat with the water in the box body 1 through the exhaust pipe 313, which can further reduce gas emissions, reduce the emission of "white smoke", and improve the environmental quality of winemaking. In particular, the steam injection pipe 2 is distributed at the bottom of the inner cavity of the box body 1, so that the water heating efficiency of the upper part of the inner cavity of the box body 1 will be relatively slow, while the exhaust pipe 313 is distributed in the middle and upper part of the inner cavity of the box body 1, so that the high-temperature uncondensed gas has a better heat exchange effect with the water in the box body 1 through the exhaust pipe 313, and can further improve the effect of auxiliary heating of the water in the box body 1.

[0030] The outer side of the end of the exhaust pipe 313 is also connected to a curved pipe 314, and the end of the curved pipe 314 is also connected to the upper end surface of the box body 1, so that the end of the exhaust pipe 313 is also connected to the upper inner wall of the box body 1 through the curved pipe 314, which can achieve the effect of balancing the internal and external air pressure.

[0031] An L-shaped overflow pipe 310 is also disposed outside the exhaust pipe 313 , and a distal end of the overflow pipe 310 extends upward to the top of the inner cavity of the box body 1 .

[0032] The heat exchange tube 33 can be a straight tube, or it can be a corrugated tube. Figure 5 As shown, the inner wall is formed with a plurality of first annular grooves spaced apart, and the outer portion of the heat exchange tube 33 is formed with a first annular convex portion 331 at a position corresponding to the first annular groove. The first annular groove inside the heat exchange tube 33 creates turbulence, which can improve heat exchange efficiency, that is, improve the auxiliary heating effect.

[0033] Combination Figure 3-5 As shown, the plurality of heat exchange tubes 33 are connected to an end shell 36, which is conical, and the smaller end of which is connected to the grain steam exhaust steam heat recovery inlet pipe 34. During operation, the high-temperature grain steam exhaust steam first enters through the grain steam exhaust steam heat recovery inlet pipe 34, then passes through the end shell 36, and then enters the plurality of heat exchange tubes 33 at the same time, so as to achieve a good heat exchange effect and improve the auxiliary heating function.

[0034] Combination Figure 4 As shown, there are two inlet pipes 34 for recovering the exhaust steam from grain steam, which are distributed on both sides of the plate and shell heat exchange device 3, and each inlet pipe 34 for recovering the exhaust steam from grain steam is connected to an end shell 36, and the end shells 36 are connected to a group of first heat exchange tubes, each group of first heat exchange tubes has multiple first heat exchange tubes, and the two groups of first heat exchange tubes are respectively connected to both sides of the shell 31, so that more first heat exchange tubes are used to realize heat exchange, and the auxiliary heating effect is better.

[0035] Combination Figure 4 As shown, the first support plate 321 and the second support plate 322 are respectively provided on both sides of the upper end of the heat exchange core 32, and the third support plate 323 and the fourth support plate 324 are respectively provided on both sides of the lower end of the heat exchange core 32. The first support plate 321 and the second support plate 322, the third support plate 323 and the fourth support plate 324 are all connected to the inner wall of the shell 31, so that a gap is formed between the outer periphery of the heat exchange core 32 and the shell 31, and at the same time, it can ensure that the heat exchange core 32 is stably installed in the shell 31, and its assembly structure is stable, the quality is better, and the service life is long.

[0036] Combination Figure 3-5As shown, the utility model has another inventive point: a siphon plate 4 is also arranged in the box body 1, and the inner cavity of the box body 1 is divided into a conventional heating zone 13 and a rapid heating zone 14 by the siphon plate 4, and a boiling water circulation interval 401 is arranged between the upper end of the siphon plate 4 and the upper inner wall of the box body 1, and the upper ends of the conventional heating zone 13 and the rapid heating zone 14 are connected through the boiling water circulation interval 401, and the lower end of the siphon plate 4 is provided with a siphon port 402 for sucking low-temperature hot water in the conventional heating zone 13 into the rapid heating zone 14, the steam injection pipe 2 is placed in the conventional heating zone 13 and the rapid heating zone 14 at the same time, and the heat exchange tube 33 is placed in the rapid heating zone 14.

[0037] During operation, since the utility model divides the inner cavity of the box body 1 into a conventional heating zone 13 and a rapid heating zone 14, the heat exchange tube 33 is placed in the rapid heating zone 14. That is to say, the heating zone of the grain moistening water tank is concentrated in the middle, namely the rapid heating zone 14, and the heat exchanged by the heat exchange tube 33 is concentrated in the rapid heating zone 14, so that the water in the rapid heating zone 14 will be heated to boiling first, and the heat will be diffused to the conventional heating zone 13 in the form of boiling. At this time, due to the temperature difference, the boiling water in the rapid heating zone 14 will flow outward to the conventional heating zone 13 through the boiling water circulation interval 401, and the low-temperature water in the conventional heating zone 13 will be sucked into the rapid heating zone 14 through the siphon port 402, so that there is an advantage of uniform heating and better heating effect.

[0038] The structure and specific assembly structure of the siphon plate 4 are described in detail below:

[0039] Combination Figure 5 As shown, the siphon plate 4 is in an inverted L shape, and includes a vertical plate 41 fixed in the box body 1 and a guide plate 42 arranged at the upper end of the vertical plate 41 and perpendicular or inclined relative to the vertical plate 41, and the guide plate 42 extends into the conventional heating area 13. The siphon port 402 is arranged at the lower end of the vertical plate 41, and the lower end of the vertical plate 41 is fixedly mounted on the bottom surface of the inner cavity of the box body 1. Alternatively, the lower end of the vertical plate 41 is fixedly mounted on the bottom surface of the inner cavity of the box body 1 through a bracket.

[0040] Combination Figure 3 As shown, the condenser 35 is also provided with a hot water pipe 351, which is connected to the bottom of the box body 1, and the hot water pipe 351 is also provided with a first control valve 352 for controlling whether it is connected to the condenser 35, so as to control whether the hot water pipe 351 is connected to the condenser 35, and further control the temperature of the condensed water flowing out of the condenser 35 to meet different usage requirements.

[0041] In summary, when the utility model is working, the high-temperature cooking exhaust steam generated in the process of cooking grains is recovered and passed into the grain cooking exhaust steam heat recovery inlet pipe 34, and then enters the heat exchange tube 33 in the plate and shell heat exchange device 3. The high-temperature cooking exhaust steam directly exchanges heat with the water in the box body 1 through the heat exchange tube 33, so that the high-temperature cooking exhaust steam can heat the water in the box body 1, so as to achieve the purpose of recovering the high-temperature grain cooking exhaust steam to assist in heating the water, so that when the steam injection pipe 2 injects steam through the steam injection hole 22 to heat the water in the later stage, the water can be quickly heated to 97-100°C, the heating efficiency is higher, the time is shorter, and the steam input can be saved, and the high-temperature grain cooking exhaust steam generated in the process of cooking grains can be recycled, which is more environmentally friendly and energy-saving; when the high-temperature grain cooking exhaust steam passes through the heat exchange tube 33, it is partially condensed into high-temperature condensed water and enters the shell-side flow channel 302, at the same time, the medium inlet pipe 311 is introduced with a cold medium (such as cold water), and the cold medium (such as cold water) enters the plate flow channel 301. At this time, the high-temperature condensed water and the uncondensed high-temperature grain steam exhaust steam are heat exchanged with the cold medium (such as cold water), so that the 25-30°C cold medium (such as cold water) is changed into a hot medium (such as hot water) with a temperature of about 70°C, and flows out from the medium outlet pipe 312, which can be used for shower water, etc., which can further improve the utilization rate of the high-temperature grain steam exhaust steam and increase the recycling effect; and in this process, not only can the high-temperature condensed water be converted into low-temperature condensed water, but the uncondensed high-temperature grain steam exhaust steam can also be condensed after heat exchange with the cold medium (such as cold water) to form a larger amount of low-temperature condensed water, thereby improving the condensation effect, and at the same time, it can reduce gas emissions, reduce the emission of "white smoke", and improve the environmental quality of winemaking.

[0042] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A grain moistening water tank for auxiliary heating by utilizing heat recovery of grain steam exhaust, comprising a tank body (1), a water inlet pipe (11) and a steam inlet pipe (21) arranged on the tank body (1), a steam injection pipe (2) arranged in the tank body (1) and connected to the steam inlet pipe (21), the steam injection pipe (2) being provided with at least one row of steam injection holes (22) for steam injection, and a grain moistening water outlet pipe (12) being provided at the lower end of the tank body (1), characterized in that: A plate-and-shell heat exchange device (3) is also provided in the housing (1), the plate-and-shell heat exchange device (3) comprising a housing (31) and a heat exchange core (32) installed in the housing (31), the heat exchange core (32) having a plate-side flow channel (301) inside, and a shell-side flow channel (302) isolated from the plate-side flow channel (301) is formed between the heat exchange core (32) and the housing (31), and a plurality of heat exchange pipes are provided on the outside of the housing (31) and are distributed at intervals and are all connected to the shell-side flow channel (302) and are used to assist in heating the water in the housing (1). (33), a plurality of heat exchange tubes (33) are connected to a grain steam exhaust steam heat recovery inlet pipe (34), a condenser (35) connected to the shell side flow channel (302) is arranged on the lower side of the shell (31), and a medium inlet pipe (311) connected to the plate side flow channel (301) and a medium outlet pipe (312) for recovering hot water are also arranged on the outer side of the shell (31); the ends of the condenser (35), the medium inlet pipe (311), the medium outlet pipe (312), and the grain steam exhaust steam heat recovery inlet pipe (34) extend out of the box body (1).

2. The grain-moistening water tank utilizing heat recovery from grain steaming for auxiliary heating according to claim 1 is characterized in that: An exhaust pipe (313) is provided on the upper side of the shell (31) and is connected to the shell-side flow channel (302) and is used to exhaust gas. The end of the exhaust pipe (313) extends outside the box (1), and the outer side of the end of the exhaust pipe (313) is also connected to a bent pipe (314). The end of the bent pipe (314) is also connected to the upper end surface of the box (1), so that the end of the exhaust pipe (313) is also connected to the upper inner wall of the box (1) through the bent pipe (314).

3. The grain moistening water tank utilizing heat recovery from grain steaming for auxiliary heating according to claim 1 is characterized in that: The heat exchange tube (33) is a corrugated tube, the inner wall of which is formed with a plurality of first annular grooves distributed at intervals, and a first annular convex portion (331) is formed on the outside of the heat exchange tube (33) at a position corresponding to the first annular groove.

4. The grain moistening water tank utilizing heat recovery from grain steaming for auxiliary heating according to any one of claims 1 to 3, characterized in that: A plurality of the heat exchange tubes (33) are connected to an end shell (36). The end shell (36) is conical, and a smaller end thereof is connected to the grain steam exhaust heat recovery inlet pipe (34).

5. The grain-moistening water tank utilizing heat recovery from grain steaming for auxiliary heating according to claim 4 is characterized in that: There are two inlet pipes (34) for recovering the heat from the grain steam exhaust gas, which are distributed on both sides of the plate and shell heat exchange device (3), and each inlet pipe (34) for recovering the heat from the grain steam exhaust gas is connected to an end shell (36), and each end shell (36) is connected to a group of first heat exchange pipes, and the two groups of first heat exchange pipes are respectively connected to both sides of the shell (31).

6. The grain moistening water tank utilizing heat recovery from grain steaming for auxiliary heating according to any one of claims 1 to 3, characterized in that: A first support plate (321) and a second support plate (322) are respectively arranged on both sides of the upper end of the heat exchange core (32), and a third support plate (323) and a fourth support plate (324) are respectively arranged on both sides of the lower end of the heat exchange core (32). The first support plate (321) and the second support plate (322), the third support plate (323) and the fourth support plate (324) are all connected to the inner wall of the shell (31), so that a gap is formed between the outer periphery of the heat exchange core (32) and the shell (31).

7. The grain moistening water tank utilizing heat recovery from grain steaming for auxiliary heating according to any one of claims 1 to 3, characterized in that: A siphon plate (4) is also provided in the box body (1), and the inner cavity of the box body (1) is divided into a conventional heating zone (13) and a rapid heating zone (14) by the siphon plate (4), and a boiling water circulation interval (401) is provided between the upper end of the siphon plate (4) and the upper inner wall of the box body (1), and the upper ends of the conventional heating zone (13) and the rapid heating zone (14) are connected through the boiling water circulation interval (401), and the lower end of the siphon plate (4) is provided with a siphon port (402) for sucking low-temperature hot water from the conventional heating zone (13) into the rapid heating zone (14), and the steam injection pipe (2) is placed in both the conventional heating zone (13) and the rapid heating zone (14), and the heat exchange pipe (33) is placed in the rapid heating zone (14).

8. The grain-moistening water tank for auxiliary heating by utilizing heat recovery from grain steaming exhaust steam according to claim 7 is characterized in that: The siphon plate (4) is in an inverted L-shape, and comprises a vertical plate (41) fixed in the box body (1) and a guide plate (42) arranged at the upper end of the vertical plate (41) and perpendicular or inclined relative to the vertical plate (41), and the guide plate (42) extends into the conventional heating zone (13).

9. The grain-moistening water tank utilizing heat recovery from grain steaming for auxiliary heating according to claim 7, characterized in that: The condenser (35) is also provided with a hot water pipe (351), the hot water pipe (351) is connected to the bottom of the box (1), and the hot water pipe (351) is also provided with a first control valve (352) for controlling whether it is connected to the condenser (35).

10. The grain moistening water tank utilizing heat recovery from grain steaming for auxiliary heating according to claim 2, characterized in that: An L-shaped overflow pipe (310) is also provided on the outside of the exhaust pipe (313), and the end of the overflow pipe (310) extends upward to the top of the inner cavity of the box body (1).

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