CN220602213U - Grate cooler with front high-temperature crusher - Google Patents

Abstract

The utility model belongs to the field of grate cooling equipment, and provides a grate cooling device with a front high-temperature crusher. The crusher is a roller crusher and is arranged in front of the grate cooler main body and used for crushing high-temperature materials; the cooling system comprises an air cooling assembly and a liquid cooling assembly; the air cooling component is respectively connected with the main shaft of the roller crusher and the grate cooler main body and provides gas for heat exchange; the liquid cooling assembly is connected with the end part of the main shaft of the roller crusher, and the flowing cooling liquid absorbs the heat of the main shaft to cool. When the grate cooler is adopted, the high-temperature spodumene materials which are roasted in the rotary kiln can be directly put into a roller crusher for crushing, and the crushed high-temperature spodumene materials enter the grate cooler for cooling treatment. The main shaft of the crusher is cooled by adopting a comprehensive cooling mode of 'middle air cooling and end liquid cooling', so that the cooling effect is better and the damage caused by leakage of cooling liquid is reduced.

Description

Grate cooler with front high-temperature crusher

Technical Field

The utility model belongs to the field of grate cooling equipment, and particularly relates to a grate cooling device with a front high-temperature crusher.

Background

Spodumene is one of the main lithium-containing minerals, has a fiber structure, and has stable heat resistance and thermal cracking property, so that the spodumene is widely applied to the industrial field, and particularly has increasingly expanded application in the aspects of ceramics, metallurgy, chemical industry and the like. The alpha spodumene in the spodumene ore is converted into beta spodumene after being calcined at 1100-1200 ℃ and converted into gamma spodumene at more than 1200 ℃. The beta-spodumene is tetragonal crystal, also called high-temperature spodumene, has thermal cracking property, can react with acid and alkali, and is most suitable for extracting lithium.

The grate cooler is widely used in the cement production field at the earliest, is introduced into the spodumene processing field, and is used as important equipment in spodumene transformation production, and the grate cooler has the main functions of cooling and crushing high-temperature spodumene materials after kiln discharge to produce spodumene material finished products.

In the prior art, grate cooling equipment for spodumene processing is mainly divided into two types. The first is to provide the cooling device in the front section of the grate cooler and the crusher in the rear section of the grate cooler. Such as: the method comprises the following steps of (1) granting China patent publication No. CN214792497U, calcining spodumene solid particles through a rotary kiln to generate calcined crystal form converted clinker, enabling high-temperature spodumene materials discharged from the kiln to enter a single-cylinder cooler first, cooling the materials through an air cooling mode, conveying the cooled materials into a roller crusher for crushing, and outputting finished products after the granularity requirements of the finished products of the materials are met. The method of cooling and crushing firstly increases the crushing difficulty and influences the production efficiency because the hardness of the spodumene material after cooling is obviously improved. Moreover, because the crushing efficiency is low, the large materials always run in the grate cooler, so that the inner wall of the grate cooler is easily scratched and blocked. The second type is to integrate the cooling system and the crusher; such as: the Chinese patent with publication number CN202555332U discloses a single-side water supply and drainage cooling device for a main shaft of a single tooth roller. When the second type of equipment is used for crushing spodumene, the high-temperature spodumene materials in a brittle state can be crushed by utilizing the thermal cracking property of the spodumene, and meanwhile, the crusher is subjected to liquid cooling through a cooling liquid channel arranged in the main shaft of the crusher, so that the crushing efficiency of the second type of equipment is higher than that of the first type of equipment. But in actual production it is found that: after the second type of equipment operates for a period of time, the main shaft is easy to damage due to long-time impact of materials, and once the main shaft is not timely replaced, cooling liquid is leaked, materials are polluted, the inside of the crusher is rusted, and the product quality and the production efficiency are reduced.

The existing grate cooling equipment for spodumene processing is analyzed, the crushing difficulty is high and the efficiency is low when the technical scheme of front section air cooling and rear section crushing is adopted, and the cooling liquid is easy to leak to pollute the inside of a material and rust crusher when the technical scheme of arranging a water cooling channel inside a main shaft is adopted. How to realize the effect of ensuring the crushing efficiency and reducing the influence of the leakage of the cooling liquid on the product quality and the production efficiency becomes the direction to be researched.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides the grate cooler with the front-mounted high-temperature crusher, wherein the front-mounted high-temperature crusher and the rear-mounted grate cooler are respectively provided with a grate cooler main body, and the roller crusher is provided with an internal air cooling and shaft end liquid cooling assembly, so that the crushing efficiency and the cooling effect are ensured, and the inside of materials or the inside of the crusher cannot be polluted even if cooling liquid leaks.

The utility model provides a grate cooler with a front high-temperature crusher, which comprises a crusher, a grate cooler main body and a cooling system;

the crusher is a roller crusher, and the roller crusher is arranged in front of the grate cooler main body and is used for crushing high-temperature materials;

the roller crusher comprises a shell, a main shaft, a tooth roller sleeve, a bearing seat and a driving assembly; the main shaft penetrates through the crushing chamber in the inner cavity of the shell, the main shaft is positioned in the middle section of the crushing chamber and is connected with the toothed roller sleeve for crushing materials, the end part of the main shaft extending out of the shell is inserted into the bearing seat for supporting, and one end of the main shaft is in transmission connection with the driving assembly; the tooth roller sleeve is made of high-carbon high-manganese steel with the weight of omega (C) of 1.0-1.3 percent and the weight of omega (Mn) of 11-14 percent.

The cooling system comprises an air cooling assembly and a liquid cooling assembly; the air cooling component is respectively connected with the main shaft of the roller crusher and the grate cooler main body and provides gas for heat exchange; meanwhile, the liquid cooling component is connected with the end part of the main shaft of the roller crusher, and the flowing cooling liquid absorbs heat of the main shaft to cool.

When the grate cooler with the front high-temperature crusher is adopted, the high-temperature spodumene materials which are roasted in the rotary kiln can be directly put into a feed inlet of a roller crusher for crushing, and the crushed high-temperature spodumene materials enter the grate cooler for cooling treatment. And the cooling system adopts a comprehensive cooling mode of 'middle air cooling and end liquid cooling' to cool the main shaft of the crusher, so that the cooling effect is better and the damage caused by leakage of cooling liquid is reduced.

Further, the liquid cooling component comprises a heat absorbing plate, a pump, a heat exchanger and a liquid cooling circulation pipeline; the heat absorbing plate is attached to the outer side of the end part of the main shaft of the roller crusher; the liquid cooling circulation pipeline returns to the hot end of the heat exchanger from the cold end of the heat exchanger through the pump and the heat absorption plate.

Further, at least one group of liquid cooling assemblies are respectively arranged at the two ends of the main shaft, and the liquid cooling assemblies are mutually independent; a group of liquid cooling assemblies are provided with a plurality of heat absorbing plates which are connected in series on a liquid cooling circulation pipeline.

Further, the liquid cooling assembly is fixed at the end part of the main shaft through the mounting frame, and the liquid cooling assembly and the main shaft follow up when the main shaft rotates.

Further, the liquid cooling assembly is fixedly installed relative to the shell, the heat absorbing plate of the liquid cooling assembly and the main shaft can move relatively, and when the main shaft rotates, the position of the heat absorbing plate is fixed.

Further, the air cooling assembly comprises a cover body and a cooling fan for providing air flow; the main shaft is provided with an air cooling channel which penetrates through the main shaft and is communicated with the inner cavity of the cover body; the cooling fan is connected into the air inlet end of the cover body, and the air outlet end of the cover body is communicated with the air inlet of the air cooling channel.

Further, the air cooling channel is arranged along the axial direction of the main shaft; the cover body of the air cooling assembly and the driving assembly are respectively arranged at the two ends of the main shaft left and right.

Further, the grate cooler main body comprises a shell and a grate bed main body arranged in the shell, and a space, below the grate bed main body, of an inner cavity of the shell is divided into a plurality of air chambers; the air cooling assembly further comprises a blower; the blower is disposed outside the housing and communicates with the plenum.

Further, the grate bed main body comprises a pushing rod, a grate plate and a hydraulic cylinder, wherein the hydraulic cylinder is in transmission connection with the pushing rod and drives the pushing rod to reciprocate on the upper surface of the grate plate; and the hydraulic cylinder is arranged in the air chamber.

Further, the pushing rod is connected with the grate plate through a pressing block-pin assembly.

Further, the driving assembly is in indirect transmission connection with the main shaft through a conveyor belt assembly.

Compared with the prior art, the utility model has the following advantages and beneficial effects.

(1) The high-temperature crusher disclosed by the utility model has the advantages that the cooling effect on the high-temperature crusher is ensured by using the cooling combination of 'middle air cooling and end air cooling', and the technical problems of leakage of cooling liquid, pollution of materials and corrosion of the inside of the crusher caused by damage of the main shaft when the high-temperature crusher works are solved.

(2) The grate cooler provided by the utility model directly crushes spodumene materials which are lower in hardness and easy to crush when the materials are still in a high-temperature state just outside the rotary kiln through the front-mounted high-temperature crusher, and then cools the spodumene materials through the cooling system, so that the cooling treatment time is optimized, the crushing difficulty is reduced, and the technical problems that the materials are hardened by cooling operation firstly, the crushing effect of the crusher is poor and the like caused by difficult crushing are solved.

Drawings

FIG. 1 is a schematic view of a grate cooler with a front high temperature crusher according to the present disclosure.

Fig. 2 is a schematic view of a partial cross-section of a roll crusher.

Fig. 3 is a schematic diagram of a connection structure between a liquid cooling assembly and a spindle.

Fig. 4 is a schematic structural diagram of an air cooling channel of the spindle.

Fig. 5 is a schematic view of the internal structure of the absorber plate.

Fig. 6 is a schematic view of the structure of the grate cooler in a partial section.

Wherein: 1. a roller crusher; 11. a housing; 12. a main shaft; 121. an air cooling channel; 13. tooth roller sleeve; 15. a crushing chamber; 16. a bearing seat; 17. a drive assembly;

311. a cover body; 312. a cooling fan; 313. a blower;

321. a heat absorbing plate; 322. a pump; 323. a heat exchanger;

2. a grate cooler body; 21. a housing; 211. a waste heat gas discharge port; 22. a grate main body; 221. pushing a material rod; 222. a grate plate; 223. a hydraulic cylinder; 23. an air chamber.

In the figure, the single arrow indicates the direction of flow of the air-cooled cooling gas. Double arrows indicate the direction of liquid-cooled coolant flow.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be further described with reference to the accompanying drawings. The following description is of a preferred one of many possible embodiments of the utility model intended to provide a basic understanding of the utility model, but not to identify key or critical elements of the utility model or to delineate the scope of the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model will be described in further detail with reference to the accompanying drawings in conjunction with specific examples, but embodiments of the utility model are not limited thereto.

Example 1:

the embodiment provides a grate cooler with a front high-temperature crusher, which comprises a crusher, a grate cooler main body 2 and a cooling system.

As shown in fig. 1, the crusher is a roller crusher 1, and the roller crusher 1 is arranged in front of the grate cooler main body 2 and is used for crushing high-temperature materials. At this time, the discharge port of the roller crusher 1 is connected with the feed port of the grate cooler main body 2. The high-temperature spodumene materials which are baked in the rotary kiln are directly put into a feed inlet of the roller crusher 1 and crushed in a high-temperature spodumene state, the crushing efficiency is high at the moment, and the high-temperature spodumene materials enter the grate cooler main body 2 for cooling treatment after the crushing is finished.

As shown in fig. 2, the roller crusher 1 comprises a shell 11, a main shaft 12, a toothed roller sleeve 13, a bearing seat 16 and a driving assembly 17; the main shaft 12 penetrates through the crushing chamber 15 in the inner cavity of the shell 11, the middle section of the main shaft 12 is positioned in the crushing chamber 15 in the shell 11 and is connected with the toothed roller sleeve 13 for crushing materials, the end part of the main shaft 12 extends out of the shell 11 and is arranged in the bearing seat 16 for supporting, and one end of the main shaft 12 is in transmission connection with the driving component 17.

The cooling system comprises an air cooling assembly and a liquid cooling assembly; the air cooling component is respectively connected with the main shaft 12 of the roller crusher 1 and the grate cooler main body 2 and provides gas for heat exchange; meanwhile, the liquid cooling component is connected with the end part of the main shaft 12 of the roller crusher 1, and the heat of the main shaft 12 is absorbed by flowing cooling liquid to cool.

Through the grate cooler with the preposed high-temperature crusher, the high-temperature spodumene materials which are lower in hardness and easy to crush when the rotary kiln is still in a high-temperature state are directly crushed through the preposed roller crusher 1, and then are cooled through the cooling system, so that the cooling treatment time is optimized, the crushing difficulty is reduced, and the technical problem of poor crushing effect caused by hard material cooling before crushing is solved.

In the embodiment, the cooling scheme of the main shaft 12 of the roller crusher 1 is air cooling and liquid cooling, and compared with single air cooling or single liquid cooling, the comprehensive cooling effect is better; the liquid-cooled heat exchange area is outside the crushing chamber 15, and the crushing chamber 15 or the material in the crushing chamber 15 is not polluted even if the cooling liquid leaks.

Example 2:

in this embodiment, a liquid cooling module will be described in detail with reference to embodiment 1.

As shown in fig. 2 and 3, the liquid cooling assembly includes a heat absorbing plate 321, a pump 322, a heat exchanger 323, and a liquid cooling circulation line; the heat absorbing plate 321 is attached to the outer side of the end of the main shaft 12 of the roller crusher 1; the liquid cooling circulation pipeline returns to the hot end of the heat exchanger 323 from the cold end of the heat exchanger 323 through the pump 322 and the heat absorbing plate 321.

The heat absorbing plate 321 is used for conducting heat of the spindle 12 and transmitting the heat to the cooling liquid; the cooling liquid is forced to circulate in the liquid cooling circulation pipeline under the action of the pump 322, so that heat is taken away; finally, heat is transferred to the air through the heat exchanger 323.

The middle section of the main shaft 12 is positioned in the crushing chamber 15 and is easy to break. In this embodiment, the liquid cooling components are intentionally disposed outside the crushing chamber 15, and the ends on both sides of the middle section of the main shaft 12 are relatively hard to break, and even if broken, the crushing chamber 15 is hard to be contaminated. Further, the cooling effect of the main shaft 12 of the crusher is improved by cooling the main shaft while cooling the main shaft by air.

In another specific embodiment, at least one group of liquid cooling components is respectively arranged at two ends of the main shaft 12, and each group of liquid cooling components is mutually independent; a plurality of heat absorbing plates 321 connected in series on the liquid cooling circulation line are provided for a group of liquid cooling modules.

The manner of connecting the heat absorbing plate 321 to the liquid cooling circulation pipeline is divided into the following ways according to the contact manner of the cooling liquid and the heat absorbing plate 321: direct contact and indirect contact.

Direct contact, such as: the inner cavity of the heat absorbing plate 321 is provided with a circulating water channel connected to the liquid cooling circulating pipeline, as shown in fig. 5. At this time, when the cooling liquid flows into the heat absorbing plate 321, the cooling liquid flows along the circulating water passage in the inner cavity of the heat absorbing plate 321, and directly contacts the heat absorbing plate 321, thereby achieving high heat exchange efficiency.

Indirect contact, such as: the water pipe in the liquid cooling circulation pipeline is directly embedded in the heat absorbing plate 321. At this time, the coolant flows through the water pipe of the liquid cooling circulation line without directly contacting the heat absorbing plate 321 when passing through the heat absorbing plate 321. The scheme of water pipe water conservancy diversion belongs to indirect contact, for the direct scheme of contacting with the heat absorption board 321 of coolant liquid, indirect contact's heat exchange efficiency is low, but because the coolant liquid is in the water pipe all the time, has reduced the joint of water pipe and circulating water passageway, and the leak protection effect is better.

The direct contact mode or the indirect contact mode can be selected according to actual conditions. The cooling pipeline connection belongs to the conventional technical means, so that the description is omitted.

In another embodiment, in order to solve the liquid cooling requirement of the spindle 12 in the rotation process under the working state, there are two main design ideas:

first kind: the liquid cooling component is fixed at the end part of the main shaft 12 through a mounting frame, and the liquid cooling component and the main shaft 12 follow up when the main shaft 12 rotates;

second kind: the liquid cooling assembly is fixedly installed relative to the housing 11, and the heat absorbing plate 321 of the liquid cooling assembly and the spindle 12 can move relatively, when the spindle 12 rotates, the position of the heat absorbing plate 321 is fixed.

Other portions of this embodiment are the same as those of embodiment 1, and thus will not be described in detail.

Example 3:

in this embodiment, an air cooling module will be described in detail based on embodiment 1.

As shown in fig. 2, the air cooling assembly includes a hood 311 and a cooling fan 312 for providing an air flow; as shown in fig. 4, the main shaft 12 is provided with an air cooling channel 121 which penetrates through the main shaft and is communicated with the inner cavity of the cover 311; the cooling fan 312 is connected to the air inlet end of the cover 311, and the air outlet end of the cover 311 is communicated with the air inlet of the air cooling channel 121.

In another specific embodiment, the air cooling channels 121 are arranged along the axial direction of the main shaft 12; the cover 311 of the air cooling assembly and the driving assembly 17 are respectively arranged at two ends of the main shaft 12 left and right.

It should be noted that, the cover 311 of the air cooling assembly and the driving assembly 17 are disposed at the same end of the main shaft 12, and still can respectively implement the functions of air cooling and driving, but in order to avoid spatial interference, the structure of the cover 311 and/or the driving assembly 17 itself, or the connection structure with the main shaft 12 will be generally complex; the cover 311 and the driving assembly 17 are respectively arranged at two ends of the main shaft 12, and the structure of each cover is relatively simple or the connection structure with the main shaft 12 is relatively simple. Of course, if the working space is limited and the size of the compression device is required, it is generally recommended to select a design in which the cover 311 and the driving assembly 17 are disposed at the same end of the main shaft 12.

In another embodiment, as shown in fig. 6, the grate cooler body 2 includes a casing 21 and a grate body 22 installed in the casing 21, and a space of the casing 21 below the grate body 22 is divided into a plurality of air chambers 23; the air cooling assembly further includes a blower 313; the blower 313 is disposed outside the cabinet 21 and communicates with the plenum 23. When the blower 313 works, gas with the temperature far lower than that of the material is fed into the air chamber 23 below the grate main body 22, so as to cool the material.

Example 4:

this embodiment will be described in detail based on embodiment 1, embodiment 2, or embodiment 3.

The embodiment provides a grate cooler with a front high-temperature crusher, which comprises a crusher, a grate cooler main body 2 and a cooling system.

The crusher is a roller crusher 1, and can be a single roller or a plurality of rollers.

As shown in fig. 1, the roller crusher 1 is arranged in front of the grate cooler main body 2 and is used for crushing high-temperature materials, and the cooling system comprises an air cooling assembly and a liquid cooling assembly; the air cooling component is respectively connected with the main shaft 12 of the roller crusher 1 and the grate cooler main body 2 and provides gas for heat exchange; meanwhile, the liquid cooling component is connected with the end part of the main shaft 12 of the roller crusher 1, and the heat of the main shaft 12 is absorbed by flowing cooling liquid to cool.

In order to realize the arrangement of the cooling system, the structures of the roller crusher 1 and the grate cooler main body 2 need to be adjusted based on the prior art.

In this embodiment, as shown in fig. 2, the roller crusher 1 includes a housing 11, a main shaft 12, a toothed roller sleeve 13, a bearing housing 16, and a driving assembly 17; the main shaft 12 penetrates through the crushing chamber 15 in the inner cavity of the shell 11, the middle section of the main shaft 12 is positioned in the crushing chamber 15 in the shell 11 and is connected with the toothed roller sleeve 13 for crushing materials, the end part of the main shaft 12 extends out of the shell 11 and is arranged in the bearing seat 16 for supporting, and one end of the main shaft 12 is in transmission connection with the driving component 17.

Further, as shown in fig. 4, the main shaft 12 is provided with an air cooling passage 121 penetrating through itself and communicating with the inner cavity of the cover 311.

Further, as shown in fig. 2, the drive assembly 17 is in indirect driving connection with the spindle 12 via a conveyor belt assembly.

Based on the roller crusher 1 with the structure, the main shaft 12 of the roller crusher 1 is cooled by the combination of middle air cooling and end air cooling, so that the cooling effect of the crusher is ensured, and the technical problems that the main shaft 12 is damaged during the working of the roller crusher 1, so that the cooling liquid leaks to pollute materials and rust the inside of the crusher are solved.

Further, in order to ensure that the toothed roller sleeve for crushing spodumene materials in a high temperature state has a good service life, the toothed roller sleeve 13 is made of high-carbon high-manganese steel with the weight of omega (C) of 1.0-1.3% and the weight of omega (Mn) of 11-14%.

In this embodiment, as shown in fig. 6, the grate cooler body 2 includes a casing 21 and a grate body 22 installed in the casing 21, and a space of the casing 21 below the grate body 22 is partitioned into a plurality of air chambers 23. The grate bed main body 22 comprises a pushing rod 221, a grate plate 222 and a hydraulic cylinder 223, wherein the hydraulic cylinder 223 is in transmission connection with the pushing rod 221 and drives the pushing rod 221 to reciprocate on the upper surface of the grate plate 222; and the hydraulic cylinder 223 is provided in the plenum 23.

Conventional grate coolers are usually electrically driven. The electric drive system is usually installed beside the grate cooler, taking up space that would otherwise be significant. In this embodiment, the hydraulic station may be placed at a place far from the grate cooler by adopting a hydraulic driving manner, and only high-pressure oil is required to be introduced into the hydraulic cylinder 223 through a hydraulic pipeline, so that space is saved, and convenience is provided for installation and maintenance. In addition, low failure rate and low noise are also important reasons for the present embodiment to use hydraulic drive as a transmission.

Further, as shown in fig. 6, the hydraulic cylinder 223 is disposed in the air chamber 23, so that the cold air blown into the air chamber 23 by the blower 313 can cool the hydraulic cylinder 223 and blow the material to the material through the grate 222.

Further, as shown in fig. 6, the housing 21 is provided with a waste heat gas discharge port 211.

In another embodiment, the pushing bar 221 is connected to the grate plate 222 by a press block-pin assembly. The press block-pin assembly includes a press block and a pin. When the pin is taken out during replacement, the pressing block is separated from the pushing rod 221, and the replacement is very convenient.

In another embodiment, an air flow regulating valve is installed at the lower part of the grate plate 222. Because the material is accumulated on the grate plate 222 to block the gas, the air flow regulating valve is automatically controlled by sensing the received wind power, and if the wind power is smaller than a set lower critical value, the valve is automatically opened; if the wind power is large enough to exceed the set upper critical value, the valve is automatically closed. The technology is the prior art, and only commercial products are purchased for use, so that the utility model is not repeated.

Other portions of this embodiment are the same as any one of embodiments 1 to 3, and thus will not be described again.

In this document, terms such as front, rear, upper, lower, etc. are defined with respect to the positions of the components in the drawings and with respect to each other, for clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can be varied in many ways depending upon the application and placement, and that the use of such orientation terms should not be taken to limit the scope of protection of the present application.

The embodiments described above and features of the embodiments herein may be combined with each other without conflict.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (9)

1. A grate cooler with a front high-temperature crusher comprises a crusher, a grate cooler main body (2) and a cooling system; the method is characterized in that: the crusher is a roller crusher (1), and the roller crusher (1) is arranged in front of the grate cooler main body (2) and is used for crushing high-temperature materials;

the roller crusher (1) comprises a shell (11), a main shaft (12), a tooth roller sleeve (13), a bearing seat (16) and a driving assembly (17); the main shaft (12) penetrates through a crushing chamber (15) in the inner cavity of the shell (11), the middle section of the main shaft (12) is positioned in the crushing chamber (15) in the shell (11) and is connected with the toothed roller sleeve (13) for crushing materials, the end part of the main shaft (12) extends out of the shell (11) and is arranged in a bearing seat (16) for supporting, and one end of the main shaft (12) is in transmission connection with the driving assembly (17);

the cooling system comprises an air cooling assembly and a liquid cooling assembly;

the air cooling assembly is respectively connected with a main shaft (12) of the roller crusher (1) and the grate cooler main body (2) to provide gas for heat exchange; meanwhile, the liquid cooling assembly is connected with the end part of the main shaft (12) of the roller crusher (1), and the heat of the main shaft (12) is absorbed by flowing cooling liquid to cool.

2. The grate cooler with a front high temperature crusher of claim 1, wherein: the liquid cooling assembly comprises a heat absorbing plate (321), a pump (322), a heat exchanger (323) and a liquid cooling circulation pipeline; the heat absorbing plate (321) is attached to the outer side of the end part of the main shaft (12) of the roller crusher (1); the liquid cooling circulation pipeline returns to the hot end of the heat exchanger (323) from the cold end of the heat exchanger (323) through a pump (322) and a heat absorption plate (321).

3. The grate cooler with a front high temperature crusher of claim 2, characterized in that: at least one group of liquid cooling assemblies are respectively arranged at two ends of the main shaft (12), and the liquid cooling assemblies are mutually independent; a plurality of heat absorbing plates (321) connected in series on the liquid cooling circulation pipeline are arranged on the liquid cooling assembly.

4. A grate cooler with a front-end high temperature crusher as claimed in claim 3, characterized in that: the liquid cooling component is fixed at the end part of the main shaft (12) through a mounting frame, and the liquid cooling component and the main shaft (12) follow up when the main shaft (12) rotates;

or, the liquid cooling assembly is fixedly installed relative to the shell (11), the heat absorbing plate (321) of the liquid cooling assembly and the main shaft (12) can move relatively, and when the main shaft (12) rotates, the position of the heat absorbing plate (321) is fixed.

5. The grate cooler with a front high temperature crusher of claim 1, wherein: the air cooling assembly comprises a cover body (311) and a cooling fan (312) for providing air flow; the main shaft (12) is provided with an air cooling channel (121) which penetrates through the main shaft and is communicated with the inner cavity of the cover body (311); the cooling fan (312) is connected into the air inlet end of the cover body (311), and the air outlet end of the cover body (311) is communicated with the air inlet of the air cooling channel (121).

6. The grate cooler with a front-end high temperature crusher of claim 5, wherein: the air cooling channel (121) is arranged along the axial direction of the main shaft (12); the cover body (311) of the air cooling assembly and the driving assembly (17) are respectively arranged at two ends of the main shaft (12).

7. The grate cooler with a front-end high temperature crusher of claim 5, wherein: the grate cooler main body (2) comprises a machine shell (21) and a grate bed main body (22) arranged in the machine shell (21), and a space, below the grate bed main body (22), of an inner cavity of the machine shell (21) is divided into a plurality of air chambers (23); the air cooling assembly further comprises a blower (313); the blower (313) is disposed outside the housing (21) and communicates with the plenum (23).

8. The grate cooler with a front high temperature crusher of claim 7, wherein: the grate bed main body (22) comprises a pushing rod (221), a grate plate (222) and a hydraulic cylinder (223), wherein the hydraulic cylinder (223) is in transmission connection with the pushing rod (221) and drives the pushing rod (221) to reciprocate on the upper surface of the grate plate (222); and the hydraulic cylinder (223) is arranged in the air chamber (23).

9. Grate cooler with a front high temperature crusher according to any one of claims 1-8, characterized in that: the driving assembly (17) is in indirect transmission connection with the main shaft (12) through a conveyor belt assembly.