Waste heat recovery device for steam explosion wall breaking of straw

Abstract

The utility model discloses a waste heat recovery device of a straw steam explosion wall, and relates to the technical field of waste heat recovery of the steam explosion wall, the waste heat recovery device of the straw steam explosion wall comprises a steam explosion tank and a material receiving device, the discharge port of the steam explosion tank is communicated with the feed port of the material receiving device, and the discharge port of the steam explosion tank is communicated with the feed port of the material receiving device. A steam outlet of the material receiving device is communicated with the settling chamber through a first pipeline, and a steam outlet of the settling chamber is communicated with the heat exchanger through a second pipeline. Straw in steam can be removed through the settling chamber, then the steam is cooled through the heat exchanger, cooled gas is discharged into the air, heat, lost in the heat exchanger, of the steam can be absorbed and applied by another heat exchange medium in the heat exchanger, and therefore waste heat recovery of the steam explosion wall of the straw is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery from steam explosion wall breaking, in particular to a waste heat recovery device for straw steam explosion wall breaking. Background Art

[0002] Steam explosion is recognized by agricultural experts as the most efficient straw feed processing method. The specific process is as follows: Crushed and cleaned straw is placed in a steam explosion tank, where high-temperature, high-pressure steam is introduced. Maintaining this steam at a specific pressure and temperature for a specified period of time allows the steam to penetrate the straw, killing pathogens and degrading pesticide residues. The tank is then opened, releasing the steam, and the straw is ejected through a pipe into a collection device. During this process, the high-pressure steam that penetrates the straw expands and performs work, disrupting the straw's microstructure. This separates the straw's fibers and hemicellulose from the lignin, breaking some chemical bonds, and significantly increasing the non-fibrous carbohydrate content and relative feed value of the steam-exploded straw.

[0003] like Figure 1 As shown, the process of existing straw steam explosion technology is as follows: steam and straw are ejected from the steam explosion tank through a pipe into a collection device, where the straw is trapped. The steam, mixed with a small amount of straw, is then discharged into the atmosphere. The waste heat of the steam in this existing technology is not utilized, and the straw trapped in the steam pollutes the factory environment, requiring frequent cleaning.

[0004] Therefore, there is an urgent need in this field for a waste heat recovery device for straw steam explosion wall breaking to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a waste heat recovery device for straw steam explosion wall breaking to solve the problems existing in the above-mentioned prior art. It can realize the waste heat recovery of straw steam explosion wall breaking, and the straw can also be settled without polluting the environment.

[0006] To achieve the above purpose, the present invention provides the following solutions:

[0007] The utility model discloses a waste heat recovery device for straw steam explosion wall breaking, comprising a steam explosion tank and a material receiving device, the discharge port of the steam explosion tank is connected to the feed port of the material receiving device, the steam outlet of the material receiving device is connected to a sedimentation chamber through a first pipeline, and the steam outlet of the sedimentation chamber is connected to a heat exchanger through a second pipeline.

[0008] Preferably, a fan is provided on the second pipeline.

[0009] Preferably, a filter is provided on the second pipeline.

[0010] Preferably, the settling chamber includes a chamber body, and a chamber steam inlet and a chamber steam outlet are provided on the side wall of the chamber body, the chamber steam inlet is used to connect to the first pipeline, and the chamber steam outlet is used to connect to the second pipeline.

[0011] Preferably, a plurality of partition walls are provided in the chamber body.

[0012] Preferably, a release window is provided on a side wall of the chamber body away from the chamber steam outlet.

[0013] Preferably, the chamber body is a reinforced concrete structure, and a cement mortar layer and a waterproof layer are provided on the inner wall of the chamber body.

[0014] Preferably, the inner floor of the chamber body has a slope, and a floor drain is provided on the inner floor of the chamber body.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The utility model can remove straw from steam through a settling chamber, thereby solving the environmental pollution problem caused by steam entraining straw, and then cools it using a heat exchanger, and then discharges the cooled gas into the air. The heat lost by the steam in the heat exchanger can be absorbed and utilized by another heat exchange medium in the heat exchanger, thereby realizing the waste heat recovery of the straw steam explosion wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is the flow chart of the existing steam explosion wall breaking equipment;

[0019] Figure 2 This is a flow chart of the waste heat recovery device for straw steam explosion wall breaking according to an embodiment of the utility model;

[0020] Figure 3 This is a diagram showing the internal structure of the settling chamber in the waste heat recovery device for straw steam explosion wall breaking according to an embodiment of the present utility model;

[0021] In the figure: 1-steam explosion tank; 2-material collecting device; 3-sedimentation chamber; 301-chamber body; 302-chamber steam inlet; 303-partition wall; 304-release window; 305-chamber steam outlet ； 4-Fan; 5-Filter; 6-Heat exchanger. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The purpose of the utility model is to provide a waste heat recovery device for straw steam explosion wall breaking to solve the problems existing in the above-mentioned prior art. It can realize the waste heat recovery of straw steam explosion wall breaking, and the straw can also be settled without polluting the environment.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] like Figure 2-Figure 3 As shown, this embodiment provides a waste heat recovery device for steam explosion wall breaking of straw, comprising a steam explosion tank 1 and a material receiving device 2, wherein the discharge port of the steam explosion tank 1 is connected to the feed port of the material receiving device 2. In order to further realize the waste heat recovery of steam explosion wall breaking, the steam outlet of the material receiving device 2 is connected to the sedimentation chamber 3 through a first pipeline, and the sedimentation chamber 3 is used to sediment the straw in the steam, and the steam outlet of the sedimentation chamber 3 is connected to the heat exchanger 6 through a second pipeline. The heat exchanger 6 is a prior art, wherein two heat exchange media are introduced, one of which is the steam from the sedimentation chamber 3, and the other can be selected from existing low-temperature water or low-temperature air. The steam can transfer heat to the low-temperature water or low-temperature air at the heat exchanger 6, and the low-temperature water or low-temperature air is converted into high-temperature water or high-temperature air, wherein the high-temperature water can be used for heating, and can also be used to preheat the softened water for the boiler, and the high-temperature air can be used for heating.

[0026] In actual use, the crushed and impurity-removed straw is placed in a steam explosion tank 1, and high-temperature and high-pressure steam is introduced into the steam explosion tank 1 at a certain pressure and temperature for a certain period of time. Then, the straw and steam in the steam explosion tank will enter the material receiving device 2 through a pipeline together, and complete gas-solid separation at the material receiving device 2. Most of the straw will be collected at the material receiving device 2, and the steam will flow out. The outflowing steam will enter the settling chamber 3 through the first pipeline. In the settling chamber 3, the straw in the steam will settle due to its own weight and be located at the bottom of the settling chamber 3. The steam will flow out of the settling chamber 3 through the second pipeline and enter the heat exchanger 6, providing heat for another heat exchange medium in the heat exchanger 6, thereby realizing the waste heat recovery effect of the straw steam explosion wall breaking. The steam after heat exchange will cool down and convert into water. It will enter the high-temperature air together with the steam and convert into air at a lower temperature after passing through the heat exchanger 6. Then, the water and normal temperature air are transported out together.

[0027] In this embodiment, a fan 4 is provided on the second pipeline, and the fan 4 provides power for steam transportation, so that the steam can be extracted and transported to the heat exchanger 6.

[0028] In this embodiment, a filter 5 is provided on the second pipeline, and the filter 5 can be provided before or after the fan 4. Figure 2 The filter 5 is closer to the heat exchanger 6 than the fan 4. The filter 5 may include but is not limited to an existing steam filter 5, which is used to remove some impurities in the steam, improve the purity of the steam, and reduce the impact on the heat exchange efficiency of the heat exchanger 6.

[0029] In this embodiment, the sedimentation chamber 3 includes a chamber body 301, which is a rectangular chamber structure. A chamber steam inlet 302 and a chamber steam outlet 305 are provided on the side wall of the chamber body 301, wherein the chamber steam inlet 302 is used to connect to the first pipeline, and the chamber steam outlet 305 is used to connect to the second pipeline.

[0030] In this embodiment, if Figure 3 As shown, the chamber body 301 is provided with a plurality of partition walls 303. There are two or more partition walls 303, which can be spaced apart vertically. The partition walls 303 can extend the steam path and obstruct the straw in the steam, thereby improving the straw settling efficiency. They can also collect more steam, reducing the amount of steam discharged from the release window 304 of the chamber body 301.

[0031] In this embodiment, a release window 304 is provided on a side wall of the chamber body 301, away from the chamber steam outlet 305. The purpose of providing the release window 304 is to prevent the sudden entry of steam, which could lead to a dangerous overpressure within the chamber body 301. Furthermore, as the steam enters, the release window 304 remains completely open. The window area is sufficiently large that the air originally in the settling chamber is pushed out through the release window 304 by the steam. Of course, some steam will escape from the release window 304 during this process, causing losses. However, this is a small amount of steam, so the loss is not significant.

[0032] In this embodiment, the chamber body 301 is constructed of reinforced concrete, allowing it to withstand a certain level of air pressure. Furthermore, the inner walls of the chamber body 301 are provided with a cement mortar layer and a waterproof layer. Specifically, the walls and floor of the reinforced concrete chamber body 301 are plastered with cement mortar and waterproofed, making the interior of the chamber body 301 resistant to moisture and corrosion.

[0033] In addition, the total volume within the chamber body 301 should be greater than the product of the volume of a single steam explosion tank 1 and the absolute pressure within the steam explosion tank 1 .

[0034] In this embodiment, the interior floor of chamber body 301 is sloped, and a floor drain is provided on the interior floor of chamber body 301. Water accumulated within chamber body 301 can flow along the slope toward the floor drain and out through the drain. When steam enters settling chamber 3, some of the steam condenses, and the condensed water flows downward and onto the ground. Finally, it flows from the floor of chamber body 301 into the floor drain, thereby preventing condensed water from accumulating at the bottom of settling chamber 3.

[0035] In this embodiment, the material receiving device 2 includes an existing cyclone dust collector, which is provided with a material receiving bin at the lower end and a steam outlet at the upper end. The steam outlet is connected to the sedimentation chamber 3 through a first pipeline, and a discharging device is also provided at the lower end discharge port of the material receiving bin. The discharging device includes a discharging drive (i.e., a motor and a reducer, the output shaft of the motor is connected to the input shaft of the reducer), and a push slurry plate is connected to the output shaft of the discharging drive (i.e., the output shaft of the reducer). When the discharging drive is started, the push slurry plate can be driven to rotate, thereby pushing the material at the bottom of the material receiving bin to be discharged from the discharge port at the bottom of the material receiving bin. As the specific structure of the cyclone dust collector is prior art, its structure will not be described in detail here.

[0036] Example 2

[0037] This embodiment provides a method for recovering waste heat from steam explosion of straw, based on the waste heat recovery device for steam explosion of straw disclosed in Example 1, comprising the following steps:

[0038] S1. Place the crushed and impurity-removed straw in a steam explosion tank 1 and introduce high-temperature and high-pressure steam. Maintain the steam at a set pressure and temperature for a set time. The specific pressure, temperature and time can be adjusted appropriately according to actual needs and are not limited here.

[0039] S2. Then, the discharge port of the steam explosion tank 1 is opened instantaneously, and the straw is ejected along with the high-temperature and high-pressure steam and enters the collecting device 2.

[0040] S3. The straw is intercepted in the collecting device 2, and the steam mixed with a small amount of straw enters the sedimentation chamber 3 through the first pipeline. The sedimentation chamber 3 is in the shape of a rectangular cavity with several partition walls 303 inside. The steam entering the sedimentation chamber 3 needs to pass through a longer channel before it can be discharged from the release window 304 of the sedimentation chamber 3.

[0041] S4. The steam entering the sedimentation chamber 3 is turned back through the partition wall 303 and sucked out by the fan 4. Most of the straw in the sucked-out steam has been removed by sedimentation. The extracted steam then passes through the filter 5 and enters the heat exchanger 6, transfers the heat to the heat exchange medium, and then flows out. Specifically, the steam can transfer its heat to low-temperature water or low-temperature air. The hot water after absorbing heat can be used for heating, and can also be used to preheat boiler softened water; the hot air after absorbing heat is used for heating. The steam entering the heat exchanger 6 is condensed into water and discharged from the heat exchanger 6. The air entering the heat exchanger 6 with the steam is also cooled. Most of the straw entrained in the steam entering the sedimentation chamber 3 settles on the ground of the sedimentation chamber 3, solving the environmental pollution problem caused by steam entrainment, and the straw settled on the ground of the sedimentation chamber 3 only needs to be manually cleaned regularly.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A waste heat recovery device for straw steam explosion wall breaking, comprising a steam explosion tank and a material receiving device, wherein the discharge port of the steam explosion tank is connected to the feed port of the material receiving device, characterized in that: The steam outlet of the material receiving device is connected to the settling chamber through a first pipeline, and the steam outlet of the settling chamber is connected to the heat exchanger through a second pipeline.

2. The waste heat recovery device for straw steam explosion wall breaking according to claim 1 is characterized by: The second pipeline is provided with a fan.

3. The waste heat recovery device for straw steam explosion wall breaking according to claim 1 is characterized by: A filter is provided on the second pipeline.

4. The waste heat recovery device for straw steam explosion wall breaking according to claim 1 is characterized in that: The settling chamber includes a chamber body, and a chamber steam inlet and a chamber steam outlet are provided on the side wall of the chamber body. The chamber steam inlet is used to connect to the first pipeline, and the chamber steam outlet is used to connect to the second pipeline.

5. The waste heat recovery device for straw steam explosion wall breaking according to claim 4 is characterized in that: A plurality of partition walls are arranged in the chamber body.

6. The waste heat recovery device for straw steam explosion wall breaking according to claim 4 is characterized by: A release window is provided on a side wall of the chamber body away from the chamber steam outlet.

7. The waste heat recovery device for straw steam explosion wall breaking according to claim 4 is characterized by: The chamber body is a reinforced concrete structure, and a cement mortar layer and a waterproof layer are provided on the inner wall of the chamber body.

8. The waste heat recovery device for straw steam explosion wall breaking according to claim 4 is characterized by: The inner floor of the chamber body has a slope, and a floor drain is provided on the inner floor of the chamber body.

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