Novel grading waste heat recovery wine distillation heat exchanger

Abstract

The utility model discloses a novel grading waste heat recovery wine distillation heat exchanger which comprises a latent heat section shell-and-tube heat exchanger and a sensible heat section winding tube heat exchanger detachably installed under the latent heat section shell-and-tube heat exchanger, and a heat exchange assembly is arranged in the latent heat section shell-and-tube heat exchanger. Distilled wine steam enters a shell of the latent heat section shell-and-tube heat exchanger from the upper part of the latent heat section shell-and-tube heat exchanger for heat exchange to form wine, and then the wine flows into the sensible heat section winding tube heat exchanger; and cooling water of the latent heat section shell-and-tube heat exchanger enters the heat exchange assembly from the upper portion to conduct heat exchange on distilled wine steam and recycle the distilled wine steam. The arrangement has the advantages that countercurrent flow heat exchange can be achieved, the outer flow channel is synchronously cooled by cooling water of the inner flow channel, and the heat exchange effect is improved; cooling water flows out from the upper end, interference with arrangement of a steam flow channel is avoided, high-temperature cooling water collected by the latent heat section of the upper half part and low-temperature cooling water collected by the sensible heat section of the lower half part are recycled and can be supplied to an evaporator side of a steam heat pump to provide a heat source, and therefore the waste heat recycling efficiency of distilled liquor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers for recovering waste heat from distilled liquor, and in particular to a novel heat exchanger for recovering waste heat from distilled liquor by grading. Background Art

[0002] Wine distillation and cooking gelatinization are important links in the production process of distilled wine production enterprises. Wine distillation is the process of converting liquid ethanol, water, aldehydes, acids, esters and other substances in the mash into gas by heating, and then condensing them into liquid, and finally separating the wine from the mash. Cooking gelatinization is the process of breaking starch to facilitate the contact between enzymes and microorganisms, and preparing suitable moisture conditions and nutrient supply for the cultivation of microorganisms. Wine distillation and cooking gelatinization require a large amount of process steam, and the used process steam needs to be condensed. The key to the steam condensation link is to continuously provide process cooling water with a temperature lower than the steam condensation temperature. After the cooling water absorbs the heat of the steam, the temperature will increase significantly (generally the temperature rise is above 40°C).

[0003] Regarding the waste heat recovery process of the winery, considering that the wine vapor produced by distillation will release a lot of heat when it is cooled into wine, this part of the waste heat can be recycled. At the same time, considering that the calorific value of latent heat when steam condenses is much greater than the calorific value of sensible heat, the waste heat can be recycled in stages, which can greatly improve the grade of recovered energy and facilitate the utilization of waste heat energy in subsequent processes. The cooling water used for condensation of existing winery distillers is often not utilized after heat exchange with wine vapor, and is a low-temperature, low-grade energy, resulting in a waste of cooling water resources. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to provide a distillation heat exchanger with high efficiency and graded waste heat recovery.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A novel graded waste heat recovery distillation heat exchanger comprises a latent heat section tube heat exchanger and a sensible heat section wound tube heat exchanger detachably mounted directly below the latent heat section tube heat exchanger, wherein a heat exchange component is arranged inside the latent heat section tube heat exchanger;

[0007] The latent heat section heat exchange: the distilled liquor vapor enters the shell of the latent heat section tube heat exchanger from the top of the latent heat section tube heat exchanger to exchange heat to form liquor, and then flows into the sensible heat section wound tube heat exchanger; the cooling water of the latent heat section tube heat exchanger enters the heat exchange component from the top to exchange heat with the distilled liquor vapor and recover it;

[0008] In the sensible heat section, the wine enters the sensible heat section from the top of the spiral wound tube heat exchanger for heat exchange and is discharged from the bottom of the spiral wound tube heat exchanger; while the cooling water of the sensible heat section spiral wound tube heat exchanger enters from the bottom, is discharged from the top and recycled.

[0009] The utility model proposes a composite tube mechanism, cooling water flows in from the top of the latent heat section tube heat exchanger, and is evenly distributed through a distributor. The cooling water in the composite tube is injected from the top and then overflows from the bottom to the top, thereby reducing the waste of water resources. The distilled wine steam enters from the top and exits from the bottom. The distilled wine steam goes through the shell side of the latent heat section tube heat exchanger, and the cooling water goes through the composite tube. The advantage of this arrangement is that countercurrent heat exchange can be achieved, and the outer flow channel is synchronously cooled by the cooling water in the inner flow channel, thereby improving the heat exchange effect; the cooling water is made to flow out from the upper end, thereby avoiding interference with the arrangement of the steam flow channel. The high-temperature cooling water collected in the upper latent heat section and the low-temperature cold water collected in the lower sensible heat section of the utility model are recycled and reused, and can be supplied to the evaporator side of the steam heat pump to provide a heat source. The low-temperature cooling water can be recycled, thereby improving the waste heat recovery efficiency of the distilled wine.

[0010] As a further solution of the utility model: the heat exchange assembly also includes a cooling water injection pipe, a distributor, a drainage pipe and a composite pipe pass, the distributor is installed in the latent heat section tube heat exchanger, and the composite pipe pass is installed below a plurality of drainage holes on the distributor;

[0011] The cooling water injection pipeline is opened at the middle position of the top of the latent heat section tube heat exchanger, and the drainage pipeline is opened on one side of the upper position of the latent heat section tube heat exchanger.

[0012] As a further solution of the utility model: the outer ring of the distributor is in close contact with the inner wall of the latent heat section shell and tube heat exchanger and is located below the cooling water injection pipe, wherein a plurality of drainage holes are opened on the distributor in a circular array, and each drainage hole corresponds to a group of composite pipe paths.

[0013] As a further solution of the utility model: the composite tube includes an outer tube and an inner tube, wherein the inner tube is higher than the outer tube, a gap is left between the bottom of the inner tube and the outer tube, and a gap also exists between the outer wall of the inner tube and the outer tube;

[0014] The top of the inner tube is connected to the corresponding drainage hole on the distributor, and the connection is sealed without gaps.

[0015] As a further solution of the utility model: the drainage pipe is located between the inner pipe and the distributor, and the cooling water overflowing from the inner pipe can enter the drainage pipe.

[0016] As a further solution of the utility model: a slope of 1-5° is arranged at the intersection where the bottom wall of the latent heat section heat exchanger is connected to the sensible heat section heat exchanger.

[0017] As a further solution of the utility model: the steam discharge pipe is in a "U"-shaped structure, wherein a steam interface is opened at the middle position of the steam discharge pipe, and two liquid outlets of the steam discharge pipe are symmetrically connected to the latent heat section shell and tube heat exchanger, and the distilled liquor vapor entering from the steam discharge pipe enters the latent heat section shell and tube heat exchanger by counter-attack.

[0018] As a further solution of the utility model: a formaldehyde discharge pipe interface is provided on the bottom side of the sensible heat section wound tube heat exchanger, the formaldehyde discharge pipe interface is connected to the formaldehyde discharge pipe through a connecting elbow, the formaldehyde discharge pipe is arranged upward, and the formaldehyde discharge pipe is connected to the latent heat section shell and tube heat exchanger through a bracket.

[0019] As a further solution of the utility model: a water inlet is provided at a lower position of the side wall of the sensible heat section spiral wound tube heat exchanger, and a water outlet is provided at an upper position.

[0020] As a further solution of the utility model: the bottom of the latent heat section tube heat exchanger is supported by an outer frame, and the sensible heat section wound tube heat exchanger is placed inside the outer frame.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] First, the utility model proposes a composite tube mechanism, cooling water flows in from the top of the latent heat section tube heat exchanger, and is evenly distributed by the distributor. The cooling water in the composite tube is injected from the top and then overflows from the bottom to the top, thereby reducing the waste of water resources. The distilled wine steam enters from the top and exits from the bottom. The distilled wine steam goes through the shell side of the latent heat section tube heat exchanger, and the cooling water goes through the composite tube. The advantage of this arrangement is that countercurrent heat exchange can be achieved, and the outer flow channel is synchronously cooled by the cooling water in the inner flow channel, thereby improving the heat exchange effect; the cooling water flows out from the upper end, thereby avoiding interference with the arrangement of the steam flow channel. The high-temperature cooling water collected in the upper latent heat section of the utility model and the low-temperature cold water collected in the lower sensible heat section are recycled and reused, and can be supplied to the evaporator side of the steam heat pump to provide a heat source. The low-temperature cooling water can be recycled, thereby improving the waste heat recovery efficiency of the distilled wine.

[0023] Second, the utility model arranges the steam discharge pipe into a "U"-shaped structure, wherein the two liquid outlets of the steam discharge pipe are symmetrically connected to the latent heat section tube heat exchanger, and the distilled liquor steam entering from the steam discharge pipe enters the latent heat section tube heat exchanger by counter-entry, so that the steam can be distributed as evenly as possible in the shell process, thereby improving the heat exchange effect;

[0024] 3. The utility model is provided with a slope of 1-5° at the intersection of the upper and lower ends between the latent heat exchanger and the sensible heat exchanger, so as to facilitate the liquid to flow into the lower heat exchanger. The slope angle can be adjusted according to the actual size to improve the liquid heat exchange efficiency;

[0025] 4. The sensible heat section of the utility model adopts a wound tube heat exchanger, which can achieve a higher heat transfer coefficient in a smaller volume compared to a shell and tube heat exchanger, reducing the volume of the overall equipment. The condensed wine and water in the wound tube heat exchanger in the sensible heat section flows through the tube side, entering from the top and exiting from the bottom, while the cooling water flows through the shell side, entering from the bottom and exiting from the top to achieve countercurrent heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a heat exchanger for recovering distilled liquor from graded waste heat according to an embodiment of the utility model;

[0027] Figure 2 A top view of a heat exchanger for recovering distilled liquor from graded waste heat according to an embodiment of the utility model;

[0028] Figure 3 It is a partial cross-sectional view of a latent heat section tube heat exchanger according to an embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the composite pipe process of an embodiment of the utility model;

[0030] Figure 5 It is a partial schematic diagram of the intersection of the latent heat section tube heat exchanger and the sensible heat section coiled tube heat exchanger of the embodiment of the utility model;

[0031] Description of reference numerals:

[0032] 1. Latent heat section shell and tube heat exchanger;

[0033] 2. Sensible heat section wound tube heat exchanger;

[0034] 31. Steam discharge pipe; 32. Steam discharge pipe;

[0035] 4. heat exchange component; 41. cooling water injection pipe; 42. drainage pipe; 43. distributor; 44. composite pipe; 441. inner pipe; 442. outer pipe;

[0036] 51. Water inlet; 52. Drainage outlet;

[0037] 6. Formaldehyde exhaust pipe;

[0038] 7. External frame. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Reference Figure 1 A novel graded waste heat recovery distillation heat exchanger includes a latent heat section tube heat exchanger 1, a sensible heat section spiral wound tube heat exchanger 2, a steam discharge pipe 31, a steam discharge pipe 32, a heat exchange component 4, a water inlet 51, a water outlet 52, a formaldehyde discharge pipe 6 and an outer frame 7, wherein the sensible heat section spiral wound tube heat exchanger 2 is detachably mounted below the latent heat section tube heat exchanger 1 by means of flange fitting bolts, and an outer frame 7 for supporting is provided below the latent heat section tube heat exchanger 1, and the sensible heat section spiral wound tube heat exchanger 2 is placed inside the outer frame 7.

[0041] Reference Figure 1 and Figure 5 A steam discharge pipe 31 is installed at an upper position on one side of the latent heat section tube-in-tube heat exchanger 1, and a pipe interface is arranged in the middle of the steam discharge pipe 31. The latent heat section tube-in-tube heat exchanger 1 is a cylindrical structure as a whole, and a connection port is arranged in the middle position of its bottom wall, and it can be detachably installed with the sensible heat section wound tube heat exchanger 2 through a flange, and a 2° slope is arranged at the intersection where the bottom wall of the latent heat section tube-in-tube heat exchanger 1 is connected with the sensible heat section heat exchanger 2. The slope design facilitates the liquid to flow into the lower heat exchanger, and the slope angle can be adjusted according to the actual size.

[0042] It should be noted that, refer to Figure 1 and Figure 2 The steam discharge pipe 31 is in a "U"-shaped structure, wherein a steam interface is provided at the middle position of the steam discharge pipe 31, and two liquid outlets of the steam discharge pipe 31 are symmetrically connected to the latent heat section tube-and-tube heat exchanger 1, respectively. The distilled liquor steam entering from the steam discharge pipe 31 enters the latent heat section tube-and-tube heat exchanger 1 by counter-attacking, so that the steam can be distributed as evenly as possible in the shell process, thereby improving the heat exchange effect.

[0043] Reference Figure 1 A formaldehyde discharge pipe interface is provided on the bottom side of the sensible heat section wound tube heat exchanger 2, and the formaldehyde discharge pipe interface is connected to the formaldehyde discharge pipe 6 through a connecting elbow. The formaldehyde discharge pipe 6 is arranged upward, and is connected to the latent heat section shell and tube heat exchanger 1 through a bracket. It should be noted that the bracket can flexibly adjust the height, so that when the winery distiller is renovated, the original structure can be changed as little as possible and the arrangement can be adapted to the height of the wine inlet.

[0044] Furthermore, a water inlet 51 is provided at a lower position of the side wall of the sensible heat section wound tube heat exchanger 2, a drain outlet 52 is provided at an upper position, and a steam exhaust pipe 32 is also provided at the bottom of the sensible heat section wound tube heat exchanger 2. It should be noted that the sensible heat section of the present application adopts a wound tube heat exchanger, which can achieve a higher heat transfer coefficient in a smaller volume compared to a shell and tube heat exchanger, thereby reducing the volume of the overall equipment. The condensed wine and water pass through the tube side of the wound tube heat exchanger, and adopts a top-in-bottom-out approach, that is, the condensed wine and water enters from the latent heat section shell and tube heat exchanger 1 to the top of the sensible heat section wound tube heat exchanger 2, passes through the tube side for heat exchange, and is finally discharged from the steam exhaust pipe 32, while the cooling water enters from the water inlet 51, passes through the shell side for refrigeration, and is finally discharged from the drain outlet 52. The cooling water enters from the bottom and exits from the top to realize countercurrent heat exchange.

[0045] Reference Figure 3 The heat exchange component 4 includes a cooling water injection pipe 41, a drainage pipe 42, a distributor 43 and a composite pipe 44, wherein the cooling water injection pipe 41 is opened at the top middle position of the latent heat section shell and tube heat exchanger 1, and the distributor 43 is placed inside and slightly above the latent heat section shell and tube heat exchanger 1. The outer ring of the distributor 43 fits and seals with the inner wall of the latent heat section shell and tube heat exchanger 1 to achieve a waterproof effect. At the same time, the distributor 43 is located directly below the cooling water injection pipe 41.

[0046] Furthermore, the distributor 43 is a disc-shaped structure as a whole, and a plurality of drainage holes are opened on the distributor 43 in a circular array. The bottom of the drainage hole is connected to the inner tube 441 in the composite pipe 44, and the connection between the inner tube 441 and the drainage hole is sealed without a gap. The number of drainage holes is the same as that of the inner tube 441, and they are also arranged in a circular array. The specific number of drainage holes and inner tubes 441 is determined according to the actual situation and the size of the latent heat section shell and tube heat exchanger 1, and this application does not limit it.

[0047] Further, refer to Figure 3 and Figure 4 The composite pipe process 44 includes an inner pipe 441 and an outer pipe 442, wherein the inner pipe 441 is higher than the outer pipe 442, a gap is left between the bottom of the inner pipe 441 and the outer pipe 442, and a gap is also present between the outer wall of the inner pipe 441 and the outer pipe 442. The cooling water injected from the cooling water injection pipe 41 enters the distributor 43, is separated by the distributor 43, and then enters each inner pipe 441, and then enters the gap between the inner pipe 441 and the outer pipe 442, and finally overflows from the outer pipe 442. It should be noted here that the drainage pipe 42 is located between the inner pipe 441 and the distributor 43, and the cooling water overflowing from the inner pipe 441 can enter the drainage pipe 42. The two liquid outlets of the steam discharge pipe 31 are located below the distributor 43, so that the distilled liquor can be directly heat exchanged when it contacts the outer pipe 442.

[0048] The specific operating principles of this application are as follows:

[0049] First, cooling water flows from the cooling water injection pipe 41 into the latent heat section tube heat exchanger 1, and the distilled wine vapor is introduced into the latent heat section tube heat exchanger 1 from the steam discharge pipe 31; wherein the cooling water enters the inner tube 441 of the composite tube 44 through the distributor 43, and then enters the gap between the inner tube 441 and the outer tube 442 from the inner tube 441 to reduce the temperature of the outer tube 442, and at this time, the distilled wine vapor can be heat exchanged; and the cooling water in the outer tube 442 flows upward, and finally overflows and is discharged from the drainage pipe 42;

[0050] The distilled wine vapor after heat exchange enters into the sensible heat section wound tube heat exchanger 2 from the bottom of the latent heat section shell and tube heat exchanger 1, and then is heat exchanged again through the sensible heat section wound tube heat exchanger 2, wherein the condensed wine vapor goes through the wound tube side, and adopts the top-in and bottom-out method, that is, it enters from the top of the sensible heat section wound tube heat exchanger 2 and is discharged from the steam discharge pipe 32 at the bottom; and the cooling water goes through the shell side, enters into the sensible heat section wound tube heat exchanger 2 from the water inlet 51 and is discharged from the water outlet 52, and countercurrent heat exchange is realized by adopting the bottom-in and top-out method. In this process, the formaldehyde exhaust pipe 6 is connected to the bottom wine outlet to discharge harmful aldehyde gases in the wine vapor.

[0051] It should be noted that the present application adopts a graded waste heat recovery method. The return temperature of the cooling water collected by the upper latent heat section drainage pipe 42 can reach 73°C, and a large flow and small temperature difference method is adopted; the return temperature of the cooling water collected by the lower sensible heat section drainage port 52 reaches 25°C, and a small flow and large temperature difference method is adopted. The high-temperature return water can be used to provide a heat source for the evaporator side of the steam heat pump, and the low-temperature cooling water can be recycled to reduce the waste of water resources.

[0052] 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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. 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 new type of graded waste heat recovery distillation heat exchanger, characterized in that: It comprises a latent heat section tube heat exchanger (1) and a sensible heat section coiled tube heat exchanger (2) which is detachably mounted directly below the latent heat section tube heat exchanger (1); a heat exchange component (4) is provided inside the latent heat section tube heat exchanger (1); The latent heat section heat exchange is as follows: the distilled liquor vapor enters the shell of the latent heat section tube heat exchanger (1) from the top to exchange heat to form liquor water, and then flows into the sensible heat section coiled tube heat exchanger (2); the cooling water of the latent heat section tube heat exchanger (1) enters the heat exchange component (4) from the top to exchange heat with the distilled liquor vapor and recover it; In the sensible heat section heat exchange, the wine enters the sensible heat section spiral wound tube heat exchanger (2) from the top for heat exchange and is discharged from the bottom of the sensible heat section spiral wound tube heat exchanger (2); and the cooling water of the sensible heat section spiral wound tube heat exchanger (2) enters from the bottom, is discharged from the top and is recovered.

2. A novel heat exchanger for recovering distilled liquor by graded waste heat according to claim 1, characterized in that: The heat exchange component (4) further comprises a cooling water injection pipe (41), a distributor (43), a drainage pipe (42) and a composite pipe pass (44); the distributor (43) is installed in the latent heat section tube heat exchanger (1); and the composite pipe pass (44) is installed below a plurality of drainage holes on the distributor (43); The cooling water injection pipe (41) is opened at the middle position of the top of the latent heat section tube heat exchanger (1), while the drainage pipe (42) is opened on one side of the upper position of the latent heat section tube heat exchanger (1).

3. A novel heat exchanger for recovering distilled liquor by graded waste heat according to claim 2, characterized in that: The outer ring of the distributor (43) is in close contact with the inner wall of the latent heat section shell and tube heat exchanger (1) and is located below the cooling water injection pipe (41), wherein the distributor (43) is provided with a plurality of drainage holes in a circular array, and each drainage hole corresponds to a group of composite pipe paths (44).

4. A novel heat exchanger for recovering distilled liquor by graded waste heat according to claim 3, characterized in that: The composite tube (44) comprises an outer tube (442) and an inner tube (441), wherein the inner tube (441) is higher than the outer tube (442), a gap is left between the bottom of the inner tube (441) and the outer tube (442), and a gap also exists between the outer wall of the inner tube (441) and the outer tube (442); The top of the inner tube (441) is connected to the corresponding drainage hole on the distributor (43), and the connection is sealed without any gap.

5. A novel heat exchanger for recovering distilled liquor by graded waste heat according to claim 4, characterized in that: The drainage pipe (42) is located between the inner pipe (441) and the distributor (43), and the cooling water overflowing from the inner pipe (441) can enter the drainage pipe (42).

6. The novel heat exchanger for recovering distilled liquor by graded waste heat according to claim 1 is characterized by: A slope of 1-5° is provided at the intersection where the bottom wall of the latent heat section tube-in-tube heat exchanger (1) and the sensible heat section coiled tube heat exchanger (2) are connected.

7. The novel heat exchanger for recovering distilled liquor by graded waste heat according to claim 1 is characterized by: A steam discharge pipe (31) is installed at an upper position on one side of the latent heat section tube-in-tube heat exchanger (1). The steam discharge pipe (31) is in a "U"-shaped structure, wherein a steam interface is provided at the middle position of the steam discharge pipe (31). Two liquid outlets of the steam discharge pipe (31) are symmetrically connected to the latent heat section tube-in-tube heat exchanger (1), and the distilled liquor steam entering from the steam discharge pipe (31) enters the latent heat section tube-in-tube heat exchanger (1) by counter-balancing.

8. The novel heat exchanger for recovering distilled liquor by graded waste heat according to claim 1 is characterized by: A formaldehyde discharge pipe interface is provided on the side of the bottom of the sensible heat section wound tube heat exchanger (2), and the formaldehyde discharge pipe interface is connected to the formaldehyde discharge pipe (6) via a connecting elbow. The formaldehyde discharge pipe (6) is arranged upward, and the formaldehyde discharge pipe (6) is connected to the latent heat section tube-in-tube heat exchanger (1) via a bracket.

9. The novel heat exchanger for recovering distilled liquor by graded waste heat according to claim 1 is characterized by: A water inlet (51) is provided at a lower position of the side wall of the sensible heat section coiled tube heat exchanger (2), and a water outlet (52) is provided at an upper position.

10. The novel heat exchanger for recovering distilled liquor by graded waste heat according to claim 1, characterized in that: The bottom of the latent heat section shell and tube heat exchanger (1) is supported by an outer frame (7), and the sensible heat section wound tube heat exchanger (2) is placed inside the outer frame (7).

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