Waste rubber low-temperature crushing device based on LNG cold energy

Abstract

The utility model belongs to the technical field of rubber crushing and cold energy utilization, and relates to a waste rubber low-temperature crushing device based on LNG (Liquefied Natural Gas) cold energy, which comprises an air inlet pipe, an air compression cooling purification unit, an air separation cold box, an LNG inlet pipe, an LNG heat exchange cold box, a primary crusher, a waste rubber inlet pipe, a low-temperature crushing unit and a rubber powder collecting bin, the air inlet pipe is communicated with the air separation cold box through the air compression cooling purification unit; the LNG inlet pipe is communicated with the air separation cold box through the LNG heat exchange cold box; the waste rubber inlet pipe, the primary crusher, the low-temperature crushing unit and the rubber powder collecting bin are communicated in sequence; and the air separation cold box is communicated with the low-temperature crushing unit. According to the utility model, the LNG cold energy is utilized to separate air to form liquid nitrogen, and then the liquid nitrogen is utilized to crush the waste rubber at low temperature, so that the waste rubber can be crushed into extremely small particles, the particles are easy to separate, the cold energy of the LNG is fully utilized, and the energy is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rubber crushing and cold energy utilization technical field relates to a kind of based on LNG cold energy's waste and old rubber low temperature crushing device. BACKGROUND

[0002] With the rapid development of automobile industry, a large amount of waste tires, waste rubber and other industrial waste are generated. These industrial wastes not only occupy a large area and pollute the environment, but also cause serious waste of resources if discarded. Therefore, in order to reduce environmental pollution, save resources and promote sustainable development, waste rubber needs to be recycled and converted into new products.

[0003] In the recycling of waste rubber, waste rubber is converted into rubber particles through crushing, grinding and other processes, and then used as runway, artificial turf filler. At present, waste rubber is converted into rubber particles by mechanical crushing at room temperature, for example, a rubber crusher disclosed in Chinese patent application No. CN115569692A, which includes a feeding part and a crushing part. The upper part of the rubber crusher is the feeding part, and the inside of the rubber crusher is the crushing part. The crushing of rubber is realized by the rubber crusher at room temperature. However, this crushing method has the following problems:

[0004] Because waste rubber still has good ductility, the existing crushing method is difficult to crush waste rubber into smaller particles, leading to difficult separation. Moreover, the existing crushing device is driven by electricity, which consumes a large amount of electric energy, resulting in high energy consumption. In addition, the existing crushing is mechanical crushing, which generates heat during crushing, leading to the risk of explosion of the crushed rubber particles. Therefore, it is a difficult problem to research a new waste rubber crushing device. UTILITY MODEL CONTENTS

[0005] In view of the technical problems of existing waste rubber crushing difficulty in crushing into smaller particles, leading to difficult separation and high energy consumption, the utility model provides a kind of based on LNG cold energy's waste and old rubber low temperature crushing device.

[0006] The utility model utilizes LNG cold energy to separate air to form liquid nitrogen, and then utilizes liquid nitrogen to realize low temperature crushing of waste rubber, so that waste rubber can be crushed into extremely small particles, which is easy to separate, and the cold energy of LNG is fully utilized to save energy.

[0007] In order to achieve the above purpose, the utility model adopts the technical scheme of:

[0008] The application discloses a kind of based on LNG cold energy's waste and old rubber low temperature crushing device, including air intake pipe, air compression cooling purification unit, air separation cold box, LNG inlet pipe, LNG heat exchange cold box, primary crusher, waste and old rubber inlet pipe, low temperature pulverizing unit and rubber powder collection bin;The air intake pipe is communicated with air separation cold box by air compression cooling purification unit;The LNG inlet pipe is communicated with air separation cold box by LNG heat exchange cold box;Waste and old rubber inlet pipe, primary crusher, low temperature pulverizing unit and rubber powder collection bin are sequentially communicated;Air separation cold box is communicated with low temperature pulverizing unit.

[0009] Further limit, the low temperature pulverizing unit includes sequentially communicated liquid nitrogen bath, grinding pulverizer, drying box and separator;The liquid nitrogen bath is communicated with air separation cold box and primary crusher respectively, and the separator is communicated with rubber powder collection bin.

[0010] Further limit, air separation inlet pipe, nitrogen outlet pipe, liquid nitrogen inlet pipe and liquid nitrogen outlet pipe are respectively arranged on the air separation cold box;The nitrogen outlet pipe is communicated with liquid nitrogen inlet pipe by LNG heat exchange cold box;The air separation inlet pipe is communicated with air compression cooling purification unit;The liquid nitrogen outlet pipe is communicated with liquid nitrogen bath.

[0011] Further limit, the based on LNG cold energy's waste and old rubber low temperature crushing device further includes low temperature liquid nitrogen storage tank;The liquid nitrogen outlet pipe is communicated with liquid nitrogen bath by low temperature liquid nitrogen storage tank.

[0012] Further limit, flow meter is arranged between the low temperature liquid nitrogen storage tank and liquid nitrogen bath.

[0013] Further limit, the based on LNG cold energy's waste and old rubber low temperature crushing device further includes first buffer bin between liquid nitrogen bath and primary crusher.

[0014] Further limit, the low temperature pulverizing unit is one or more;

[0015] When the low temperature pulverizing unit is multiple, multiple low temperature pulverizing units are sequentially connected in series, the liquid nitrogen bath of first low temperature pulverizing unit is communicated with first buffer bin, and the separator of last low temperature pulverizing unit is communicated with rubber powder collection bin;The liquid nitrogen bath in each low temperature pulverizing unit is communicated with low temperature liquid nitrogen storage tank.

[0016] Further limit, when the low temperature pulverizing unit is multiple, second buffer bin is further arranged between adjacent two low temperature pulverizing units.

[0017] Further limit, the air compression cooling purification unit includes air compressor, air cooler, air purification box and cooling medium tank;The air intake pipe is sequentially communicated with air separation cold box by air compressor, air cooler and air purification box;The air cooler is also communicated with cooling medium tank.

[0018] Further limited, the waste rubber low-temperature crushing device based on LNG cold energy further comprises a filter arranged between the air inlet pipe and the air compressor.

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] 1、 the utility model discloses a kind of waste rubber low-temperature crushing devices based on LNG cold energy, including air compressor, air inlet pipe, air outlet pipe, air filter, air cooler, air purification unit, air separation unit, liquid nitrogen bath, waste rubber low-temperature crushing device, air separation unit is connected to air cooler, air cooler is connected to air purification unit, air purification unit is connected to air compressor, air compressor is connected to air inlet pipe, air filter is connected to air inlet pipe, waste rubber low-temperature crushing device is connected to liquid nitrogen bath, liquid nitrogen bath is connected to air separation unit, waste rubber low-temperature crushing device is connected to air outlet pipe.

[0021] 2、 the utility model discloses a kind of waste rubber low-temperature crushing devices based on LNG cold energy, including air compressor, air inlet pipe, air outlet pipe, air filter, air cooler, air purification unit, air separation unit, liquid nitrogen bath, waste rubber low-temperature crushing device, air separation unit is connected to air cooler, air cooler is connected to air purification unit, air purification unit is connected to air compressor, air compressor is connected to air inlet pipe, air filter is connected to air inlet pipe, waste rubber low-temperature crushing device is connected to liquid nitrogen bath, liquid nitrogen bath is connected to air separation unit, waste rubber low-temperature crushing device is connected to air outlet pipe.

[0022] 3、 the utility model discloses a kind of waste rubber low-temperature crushing devices based on LNG cold energy, including air compressor, air inlet pipe, air outlet pipe, air filter, air cooler, air purification unit, air separation unit, liquid nitrogen bath, waste rubber low-temperature crushing device, air separation unit is connected to air cooler, air cooler is connected to air purification unit, air purification unit is connected to air compressor, air compressor is connected to air inlet pipe, air filter is connected to air inlet pipe, waste rubber low-temperature crushing device is connected to liquid nitrogen bath, liquid nitrogen bath is connected to air separation unit, waste rubber low-temperature crushing device is connected to air outlet pipe. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The first waste rubber low-temperature crushing processing device is provided for example 1;

[0024] Figure 2 Another waste rubber low-temperature crushing processing device is provided for example 1;

[0025] Figure 3 The waste rubber low-temperature crushing processing device is provided for example 2;

[0026] Figure 4 The structure schematic diagram of air compression cooling purification unit;

[0027] Among them:

[0028] 10-air inlet pipe; 101-filter; 20-air compression cooling purification unit; 201-air compressor; 202-air cooler; 203-air purification tank; 204-cooling medium tank; 30-air separation cold box; 301-air separation inlet pipe; 302-nitrogen outlet pipe; 303-liquid nitrogen inlet pipe; 304-liquid nitrogen outlet pipe; 40-LNG heat exchange cold box; 401-LNG inlet pipe; 402-NG outlet pipe; 50-primary crusher; 501-waste rubber inlet pipe; 60-first buffer bin; 70-low-temperature pulverizing unit; 701-liquid nitrogen bath; 702-grinding pulverizer; 703-drying box; 704-separator; 80-gel powder collecting bin; 90-low-temperature liquid nitrogen storage tank; 100-flow meter; 110-second buffer bin. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be further understood that, when the terms "comprise" and / or "include" are used in the specification, it indicates the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0031] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0032] Example 1

[0033] Referring to Figure 1The waste rubber low-temperature crushing device based on LNG cold energy provided by the embodiment comprises an air inlet pipe 10, an air compression cooling purification unit 20, an air separation cold box 30, an LNG inlet pipe 401, an LNG heat exchange cold box 40, a primary crusher 50, a waste rubber inlet pipe 501, a low-temperature crushing unit 70 and a rubber powder collecting bin 80; the air inlet pipe 10 is communicated with the air separation cold box 30 through the air compression cooling purification unit 20; the LNG inlet pipe 401 is communicated with the air separation cold box 30 through the LNG heat exchange cold box 40; the waste rubber inlet pipe 501, the primary crusher 50, the low-temperature crushing unit 70 and the rubber powder collecting bin 80 are communicated in sequence; and the air separation cold box 30 is communicated with the low-temperature crushing unit 70.

[0034] In the embodiment, the low-temperature crushing unit 70 is one, and the low-temperature crushing unit 70 comprises a liquid nitrogen bath 701, a grinding crusher 702, a drying box 703 and a separator 704 communicated in sequence; the liquid nitrogen bath 701 is communicated with the air separation cold box 30 and the primary crusher 50 respectively, and the separator 704 is communicated with the rubber powder collecting bin 80.

[0035] In the implementation, the liquid nitrogen bath 701 is used to freeze the waste rubber crushed by the primary crusher by using liquid nitrogen, so that the molecular chain of the waste rubber cannot move at low temperature and is brittle, thereby facilitating the subsequent continuous crushing and separation; compared with the normal-temperature crushing, the low-temperature crushing can crush the waste rubber into extremely small particles, so that the components are easily separated.

[0036] In the embodiment, an air separation inlet pipe 301, a nitrogen outlet pipe 302, a liquid nitrogen inlet pipe 303 and a liquid nitrogen outlet pipe 304 are arranged on the air separation cold box 30 respectively; the nitrogen outlet pipe 302 is communicated with the liquid nitrogen inlet pipe 303 through the LNG heat exchange cold box 40; the air separation inlet pipe 301 is communicated with the air compression cooling purification unit 20; and the liquid nitrogen outlet pipe 304 is communicated with the liquid nitrogen bath 701.

[0037] Referring to Figure 1 The waste rubber low-temperature crushing device based on LNG cold energy provided by the embodiment further comprises a first buffer bin 60 arranged between the liquid nitrogen bath 701 and the primary crusher 50. The first buffer bin 60 plays a buffering role on the waste rubber entering the liquid nitrogen bath 701, thereby ensuring the running stability.

[0038] Referring to Figure 2 The waste rubber low-temperature crushing device based on LNG cold energy provided by the embodiment further comprises a low-temperature liquid nitrogen storage tank 90; the liquid nitrogen outlet pipe 304 is communicated with the liquid nitrogen bath 701 through the low-temperature liquid nitrogen storage tank 90.

[0039] In implementation, a flow meter 100 is arranged between the low-temperature liquid nitrogen storage tank 90 and the liquid nitrogen bath 701, and the amount of liquid nitrogen entering the liquid nitrogen bath 701 is measured through the flow meter 100. In implementation, in order to control the amount of liquid nitrogen, a liquid nitrogen control valve is further arranged between the low-temperature liquid nitrogen storage tank 90 and the liquid nitrogen bath 701, and the opening, closing and flow rate of the liquid nitrogen are controlled through the liquid nitrogen control valve, so as to ensure that the liquid nitrogen flowing into the liquid nitrogen bath 701 meets the low-temperature freezing requirement of the waste rubber.

[0040] The working process of the waste rubber low-temperature crushing device based on LNG cold energy provided by the embodiment is as follows:

[0041] Air enters the air compression, cooling and purification unit 20 from the air inlet pipe 10, and after compression, cooling and purification, the air enters the air separation cold box 30 from the air separation inlet pipe 301 to generate nitrogen, and the nitrogen enters the LNG heat exchange cold box 40 from the nitrogen outlet pipe 302. At the same time, LNG (high-pressure low-temperature natural gas) enters the LNG heat exchange cold box 40 from the LNG inlet pipe 401, and the nitrogen and the LNG (high-pressure low-temperature natural gas) exchange heat, the LNG (high-pressure low-temperature natural gas) is warmed to form NG (high-pressure normal-temperature natural gas), which is discharged from the NG outlet pipe 402 to collect in the natural gas pipe network for utilization; the nitrogen absorbs the cold energy of the LNG to form liquid nitrogen, which reenters the air separation cold box 30 from the liquid nitrogen inlet pipe 303, and the temperature in the air separation cold box 30 is lowered, so that the air after compression, cooling and purification forms low-temperature liquid nitrogen products, which enter the low-temperature liquid nitrogen storage tank 90 from the liquid nitrogen outlet pipe 304, and then enter the liquid nitrogen bath 701 according to a certain flow rate; at the same time, the waste rubber enters the primary crusher 50 from the waste rubber inlet pipe 501, and after primary crushing, the waste rubber enters the first buffer bin 60 for storage; then the waste rubber enters the liquid nitrogen bath 701, and the low-temperature liquid nitrogen freezes the waste rubber to make the molecular chains of the waste rubber unable to move and brittle; then the brittle waste rubber enters the grinding mill 702, and in the grinding process, the large particles of metal and fiber in the brittle waste rubber are not easy to be ground into powder, and the large particles of metal and fiber can be directly separated from the grinding mill 702; the ground rubber particles enter the drying box 703 for drying; then the waste rubber enters the separator 704 for further separation of the entrained metal and fiber, and the separated rubber powder enters the rubber powder collection bin 80 for collection.

[0042] Embodiment 2

[0043] On the basis of embodiment 1, referring to Figure 3The low-temperature crushing device based on LNG cold energy provided in the embodiment comprises a low-temperature crushing unit 70, a first buffer bin 60, a low-temperature liquid nitrogen storage tank 90, a rubber powder collecting bin 80 and an air compression cooling purification unit 20.

[0044] In the implementation, each low-temperature crushing unit 70 comprises a liquid nitrogen bath 701, a grinding pulverizer 702, a drying box 703 and a separator 704 which are sequentially connected; the plurality of low-temperature crushing units 70 are sequentially connected; the separator 704 of a previous low-temperature crushing unit 70 is connected with the liquid nitrogen bath 701 of a subsequent low-temperature crushing unit 70.

[0045] In the implementation, when the low-temperature crushing unit 70 is multiple, a second buffer bin 110 is further arranged between two adjacent low-temperature crushing units 70. That is, the second buffer bin 110 is arranged between the separator 704 of a previous low-temperature crushing unit 70 and the liquid nitrogen bath 701 of a subsequent low-temperature crushing unit 70, so as to buffer the rubber powder separated by the previous low-temperature crushing unit 70 and ensure the stable operation of the whole device.

[0046] Preferably, the low-temperature crushing unit 70 is two, the liquid nitrogen bath 701 of a first low-temperature crushing unit 70 is communicated with the first buffer bin 60, the separator 704 of the first low-temperature crushing unit 70 is communicated with the liquid nitrogen bath 701 of a second low-temperature crushing unit 70 through the second buffer bin 110, and the separator 704 of the second low-temperature crushing unit 70 is communicated with the rubber powder collecting bin 80; the liquid nitrogen bath 701 in the two low-temperature crushing units 70 is communicated with the low-temperature liquid nitrogen storage tank 90.

[0047] In the embodiment, the working process of the two low-temperature crushing units 70 is referred to the embodiment 1, and two-stage low-temperature crushing is realized through the two low-temperature crushing units 70, so as to improve the crushing and separating effect of the waste and old rubber.

[0048] Embodiment 3

[0049] Referring to Figure 4 On the basis of the embodiment 1 or the embodiment 2, the low-temperature crushing device based on LNG cold energy provided in the embodiment comprises an air compression cooling purification unit 20, the air compression cooling purification unit 20 comprising an air compressor 201, an air cooler 202, an air purification box 203 and a cooling medium box 204; the air inlet pipe 10 is communicated with the air separation cooling box 30 through the air compressor 201, the air cooler 202 and the air purification box 203 in sequence; and the air cooler 202 is further communicated with the cooling medium box 204.

[0050] In the embodiment, the filter 101 is arranged between the air inlet pipe 10 and the air compressor 201, and the filter 101 filters impurities in the air.

[0051] In the implementation, the air is filtered first, then compressed by the air compressor 201, then cooled by the air cooler 202, and the compressed and cooled air is purified by the air purification tank 203 to obtain compressed and low-temperature purified air, which enters the air separation cold tank 30 through the air separation inlet pipe 301.

[0052] In the implementation, the cooling medium tank 204 contains cooling medium, and the cooling medium cools the air entering the air cooler 202.

[0053] In the implementation, the cooling medium in the cooling medium tank 204 can be cooling water or ethylene glycol.

[0054] In summary, the waste rubber low-temperature crushing device based on LNG cold energy provided by the utility model separates low-temperature liquid nitrogen products from air by using LNG cold energy, and then freezes the waste rubber by using the low-temperature liquid nitrogen products to make the rubber molecular chain brittle, so that the waste rubber is easily crushed and separated. The cold energy of LNG is used as a cold source to realize low-temperature crushing of waste rubber, replace the existing mechanical crushing, make the rubber quickly crushed into small particles, fully utilize the cold energy, save energy and protect the environment, avoid dangerous accidents, fully utilize the LNG cold energy, and save energy.

[0055] Obviously, the above-described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, any modification, equivalent replacement, improvement and the like made by the person skilled in the art without creative labor should be included in the protection scope of the utility model.

Claims

1. A waste rubber low-temperature crushing device based on LNG cold energy, characterized in that, The device comprises an air inlet pipe (10), an air compression cooling purification unit (20), an air separation cold box (30), an LNG inlet pipe (401), an LNG heat exchange cold box (40), a primary crusher (50), a waste rubber inlet pipe (501), a low-temperature crushing unit (70), and a rubber powder collection bin (80); the air inlet pipe (10) is communicated with the air separation cold box (30) through the air compression cooling purification unit (20); the LNG inlet pipe (401) is communicated with the air separation cold box (30) through the LNG heat exchange cold box (40); the waste rubber inlet pipe (501), the primary crusher (50), the low-temperature crushing unit (70), and the rubber powder collection bin (80) are communicated in sequence; and the air separation cold box (30) is communicated with the low-temperature crushing unit (70).

2. The LNG cold energy based waste rubber cryogenic shredding device according to claim 1, characterized in that, The low-temperature crushing unit (70) comprises a liquid nitrogen bath (701), a grinding crusher (702), a drying box (703), and a separator (704) communicated in sequence; the liquid nitrogen bath (701) is communicated with the air separation cold box (30) and the primary crusher (50) respectively, and the separator (704) is communicated with the rubber powder collection bin (80). 3.The waste rubber low-temperature crushing device based on LNG cold energy according to claim 2, characterized in that, The air separation cold box (30) is provided with an air separation inlet pipe (301), a nitrogen outlet pipe (302), a liquid nitrogen inlet pipe (303), and a liquid nitrogen outlet pipe (304) respectively; the nitrogen outlet pipe (302) is communicated with the liquid nitrogen inlet pipe (303) through the LNG heat exchange cold box (40); the air separation inlet pipe (301) is communicated with the air compression cooling purification unit (20); and the liquid nitrogen outlet pipe (304) is communicated with the liquid nitrogen bath (701).

4. The waste rubber low-temperature crushing device based on LNG cold energy according to claim 3, characterized in that, The waste rubber low-temperature crushing device based on LNG cold energy further comprises a low-temperature liquid nitrogen storage tank (90); the liquid nitrogen outlet pipe (304) is communicated with the liquid nitrogen bath (701) through the low-temperature liquid nitrogen storage tank (90). 5.The waste rubber cryogenic crushing device based on LNG cold energy according to claim 4, characterized in that, A flow meter (100) is arranged between the low-temperature liquid nitrogen storage tank (90) and the liquid nitrogen bath (701). 6.The waste rubber cryogenic crushing device based on LNG cold energy according to claim 5, characterized in that, The waste rubber low-temperature crushing device based on LNG cold energy further comprises a first buffer bin (60) arranged between the liquid nitrogen bath (701) and the primary crusher (50).

7. The waste rubber cryogenic crushing device based on LNG cold energy according to claim 6, characterized in that, The low-temperature crushing unit (70) is one or more; When the low-temperature crushing unit (70) is multiple, the multiple low-temperature crushing units (70) are connected in sequence, the liquid nitrogen bath (701) of the first low-temperature crushing unit (70) is communicated with the first buffer bin (60), the separator (704) of the last low-temperature crushing unit (70) is communicated with the rubber powder collection bin (80), and the liquid nitrogen bath (701) in each low-temperature crushing unit (70) is communicated with the low-temperature liquid nitrogen storage tank (90). 8.The waste rubber cryogenic crushing device based on LNG cold energy according to claim 7, characterized in that, When the low-temperature crushing unit (70) is multiple, a second buffer bin (110) is further arranged between adjacent two low-temperature crushing units (70).

9. The LNG cold energy based waste rubber cryogenic shredding device according to any one of claims 1-8, characterized in that, The air compression cooling purification unit (20) comprises an air compressor (201), an air cooler (202), an air purification box (203) and a cooling medium box (204); the air inlet pipe (10) is communicated with the air separation cooling box (30) through the air compressor (201), the air cooler (202) and the air purification box (203) in sequence; and the air cooler (202) is further communicated with the cooling medium box (204). 10.The waste rubber cryogenic crushing device based on LNG cold energy according to claim 9, characterized in that, The waste rubber low-temperature crushing device based on LNG cold energy further comprises a filter (101) arranged between the air inlet pipe (10) and the air compressor (201).

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