阅读说明：本技术 一种多用煤液化装置及煤液化工艺 (Multipurpose coal liquefaction device and coal liquefaction process ) 是由 宋真 于 2021-01-25 设计创作，主要内容包括：本发明公开了一种多用煤液化装置及煤液化工艺,包括气化炉、灰处理装置、气体冷却装置、水汽分离装置、低温甲醇洗装置和产品加工装置,气化炉的灰尘输出端与灰处理装置的输入端通过管道连接,气化炉的混合气体输出端与气体冷却装置的输入端通过气管连接,气体冷却装置的液体输出端与水汽分离装置的输入端通过水管连接,气体冷却装置的气体输出端与低温甲醇洗装置的输入端通过气管连接,水汽分离装置与低温甲醇洗装置的液体输出端与产品加工装置连接；本发明的有益效果为甲醇喷洒更加均匀,进而提高甲醇对混合气体的物理吸收,可留有一定的时间进行缓冲吸收,提高低温甲醇洗的处理效果。(The invention discloses a multipurpose coal liquefaction device and a coal liquefaction process, which comprise a gasification furnace, an ash treatment device, a gas cooling device, a water-vapor separation device, a low-temperature methanol washing device and a product processing device, wherein the dust output end of the gasification furnace is connected with the input end of the ash treatment device through a pipeline, the mixed gas output end of the gasification furnace is connected with the input end of the gas cooling device through an air pipe, the liquid output end of the gas cooling device is connected with the input end of the water-vapor separation device through a water pipe, the gas output end of the gas cooling device is connected with the input end of the low-temperature methanol washing device through an air pipe, and the water-vapor separation device and the liquid output end of the low-; the invention has the advantages that the methanol is sprayed more uniformly, thereby improving the physical absorption of the methanol to the mixed gas, reserving a certain time for buffer absorption and improving the treatment effect of low-temperature methanol washing.)

1. The utility model provides a multi-purpose coal liquefaction device, includes gasifier (1), ash processing apparatus (2), gas cooling device (3), water vapor separator (4), low temperature methanol washing device (5) and product processingequipment (6), its characterized in that: the dust output end of the gasification furnace (1) is connected with the input end of the dust treatment device (2) through a pipeline, the mixed gas output end of the gasification furnace (1) is connected with the input end of the gas cooling device (3) through an air pipe, the liquid output end of the gas cooling device (3) is connected with the input end of the water-vapor separation device (4) through a water pipe, the gas output end of the gas cooling device (3) is connected with the input end of the low-temperature methanol washing device (5) through an air pipe, and the water-vapor separation device (4) is connected with the liquid output end of the low-temperature methanol washing device (5) and the product processing device (6);

the low-temperature methanol washing device (5) comprises a circulating conveying pipeline (51), a methanol spraying mechanism (52), a first suspension mechanism (53), a second suspension mechanism (54) and a mixed methanol circulating mechanism (55), wherein the first suspension mechanism (53) and the second suspension mechanism (54) are sleeved on the outer side of the methanol spraying mechanism (52), the methanol spraying mechanism (52) is arranged on the inner side of the conveying pipe (511), the circulating conveying pipeline (51) comprises a conveying pipe (511), a first liquid collecting cover (512), a second liquid collecting cover (513) and a liquid collecting pipe (514), the first liquid collecting cover (512) is arranged on the lower side of one end of the conveying pipe (511) and communicated with the conveying pipe (511), the second liquid collecting cover (513) is arranged on the lower side of the other end of the conveying pipe (511) and communicated with the conveying pipe (511), the lower ends of the first liquid collecting cover (512) and the second liquid collecting cover (513) are connected with the liquid collecting pipe (514), the lower end of the liquid collecting pipe (514) is connected with the input end of the mixed methanol circulating mechanism (55), and the output end of the mixed methanol circulating mechanism (55) is connected with the methanol spraying mechanism (52).

2. The multi-purpose coal liquefaction plant of claim 1, characterized by: the methanol spray mechanism (52) comprises a support shell (521), a drive rod (522), a first bearing (523) and a support rod (524), wherein a servo motor (5211) is arranged inside the support shell (521), the drive end of the servo motor (5211) is connected with one end of the drive rod (522), the other end of the drive rod (522) is connected with an inner ring of the first bearing (523), and the support rod (524) is fixedly arranged on two sides of an outer ring of the first bearing (523).

3. The multi-purpose coal liquefaction plant of claim 1, characterized by: the methanol spray mechanism (52) further comprises an air guide rod (525), a first spray head (526) and a second spray head (527), the upper end of the air guide rod (525) is fixedly connected with one side of the outer ring of the first bearing (523), the first spray head (526) is arranged at one end of the driving rod (522), and the second spray head (527) is arranged at the other end of the driving rod (522).

4. The multi-purpose coal liquefaction plant of claim 1, characterized by: the first suspension mechanism (53) and the second suspension mechanism (54) are identical in structure composition, the first suspension mechanism (53) comprises a rotating disk (531) and a fixed disk (532), the rotating disk (531) is attached to the fixed disk (532), the rotating disk (531) is fixedly arranged on the outer side of the driving rod (522), and the fixed disk (532) is fixedly arranged on the outer side of the driving rod (522).

5. The multi-purpose coal liquefaction plant of claim 4, characterized by: the rotating disc (531) comprises a rotating sheet (5311), a fixing frame (5312), a clamping sheet (5313) and a rubber pad (5314), the fixing frame (5312) is fixedly arranged on one side of the rotating sheet (5311), the clamping sheet (5313) is fixedly arranged on the outer side of the rubber pad (5314), two ends of the clamping sheet (5313) are fixedly connected with the fixing frame (5312), and the rubber pad (5314) is arranged on the inner side of the fixing frame (5312).

6. The multi-purpose coal liquefaction plant of claim 5, characterized by: the rotating plate (5311) starts to be provided with a first through hole (53111), the middle part of the fixed disc (532) is provided with a second bearing (5321), the fixed disc (532) is also provided with a second through hole (5322), and the first through hole (53111) and the second through hole (5322) have the same aperture.

7. The multi-purpose coal liquefaction plant of claim 6, characterized by: the outer side of the clamping piece (5313) protrudes out of the outer side of the fixing frame (5312), and the thickness of the surface of the second through hole (5322) opposite to the first through hole (53111) protruding forwards is the same as the protruding thickness of the clamping piece (5313).

8. A coal liquefaction process for a multi-purpose coal liquefaction plant as claimed in any of claims 1 to 7, wherein: the method comprises the following steps:

s1: adding solid coal and oxygen-containing air separation gas into a gasification furnace (1), controlling the temperature at 550-580 ℃, adding the gasified mixed gas into a gas cooling device (3), and adding ash into an ash treatment device (2);

s2: the gas cooling device (3) works, the treated liquid is injected into the water-vapor separation device (4), and the treated mixed gas is injected into the low-temperature methanol washing device (5);

s3: and (3) collecting the synthesis gas treated by the low-temperature methanol washing device (5), and processing the oil-containing product treated by the low-temperature methanol washing device (5) and the oil-containing product treated by the water-vapor separation device (4) in a product processing device (6) to generate tar or oil.

9. The coal liquefaction process of the multi-purpose coal liquefaction plant of claim 8, wherein: the specific process steps of S2 are as follows:

s21: the gas cooling device (3) discharges the mixed gas into the conveying pipe (511), the conveying pipe (511) conveys the methanol to the first spray header (526) through the gas guide rod (525) and sprays the methanol to the gas, and meanwhile, the servo motor (5211) is started to drive the driving rod (522) to rotate, so that the first spray header (526) rotates to spray, and the mixed gas is subjected to physical absorption treatment;

s22: the driving rod (522) rotates to drive the first suspension mechanism (53) to rotate, a first through hole (53111) on the first suspension mechanism (53) is opposite to a second through hole (5322), and residual gas after primary treatment enters a conveying pipe (511) where the second spray head (527) is located so as to be subjected to secondary treatment;

s23: the same working principle as that of S21-S22, the gas after methanol absorption is discharged from the second suspension mechanism (54) finally, and the low-temperature methanol washing treatment is completed preliminarily.

Technical Field

The invention relates to the technical field of coal liquefaction equipment, in particular to a multipurpose coal liquefaction device and a coal liquefaction process.

Background

Coal liquefaction is an advanced clean coal technology that converts solid coal into liquid fuels, chemical raw materials and products through a chemical processing process. According to different processing routes, coal liquefaction can be divided into two main categories of direct liquefaction and indirect liquefaction, and coal liquefaction belongs to chemical changes.

However, when the low-temperature methanol washing device of the coal liquefaction indirect treatment device physically absorbs mixed gas, methanol is sprayed and absorbed, a spraying gap easily exists, so that methanol is not uniformly absorbed, gas flows and is fixed, the gas which is not sprayed by the methanol can be directly discharged, the effect of low-temperature methanol washing is reduced, and the two problems greatly reduce the effect of coal liquefaction.

To solve the above problems. Therefore, a multipurpose coal liquefaction device and a coal liquefaction process are provided.

Disclosure of Invention

The invention aims to provide a multipurpose coal liquefaction device and a coal liquefaction process, mixed gas is discharged into a conveying pipe through a gas cooling device, methanol is conveyed to a first spray header through a gas guide rod by the conveying pipe and is sprayed to the gas, a servo motor is started to drive a driving rod to rotate at the same time, so that the first spray header rotates for spraying, the sprayed methanol can rotate and spray completely under the rotating centrifugal force of the driving rod, the state of the sprayed methanol in the conveying pipe tends to be stable after the methanol is rotated stably, the methanol is not locally different, the methanol is sprayed more uniformly, the physical absorption of the methanol to the mixed gas is improved, the driving rod rotates to drive a first temporary mechanism to rotate while the methanol is sprayed, when a first through hole is opposite to a second through hole, the gas starts to enter the conveying pipe where the second spray header is located, and performing secondary treatment, wherein when the first through hole and the second through hole are staggered, the second through hole extrudes the clamping piece, so that the second through hole is closed, the flow of the mixed gas in the conveying pipe where the conveying pipe is located is blocked, and a certain time is reserved for buffering and absorption, thereby solving the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a multi-purpose coal liquefaction device comprises a gasification furnace, an ash treatment device, a gas cooling device, a water-vapor separation device, a low-temperature methanol washing device and a product processing device, wherein a dust output end of the gasification furnace is connected with an input end of the ash treatment device through a pipeline, a mixed gas output end of the gasification furnace is connected with an input end of the gas cooling device through an air pipe, a liquid output end of the gas cooling device is connected with an input end of the water-vapor separation device through a water pipe, a gas output end of the gas cooling device is connected with an input end of the low-temperature methanol washing device through an air pipe, and the water-vapor separation device and a liquid output end of the low-;

the device is washed to low temperature methyl alcohol includes circulation pipeline, methyl alcohol sprays the mechanism, first temporary slow mechanism, the second temporary slow mechanism and mixed methyl alcohol circulation mechanism, first temporary slow mechanism and second temporary slow mechanism all overlap in the outside that methyl alcohol sprayed the mechanism, methyl alcohol sprays the inboard that the mechanism set up at the conveyer pipe, circulation pipeline includes the conveyer pipe, first collection liquid cover, second collection liquid cover and collection liquid pipe, first collection liquid cover sets up the one end downside at the conveyer pipe, and with the conveyer pipe intercommunication, second collection liquid cover sets up the other end downside at the conveyer pipe, and with the conveyer pipe intercommunication, the lower extreme of first collection liquid cover and second collection liquid cover all is connected with the collector pipe, the lower extreme of collector pipe is connected with mixed methyl alcohol circulation mechanism's input, mixed methyl alcohol circulation mechanism's output and methyl alcohol spray mechanism and be connected.

Further, the methanol spraying mechanism comprises a supporting shell, a driving rod, a first bearing and a supporting rod, a servo motor is arranged inside the supporting shell, the driving end of the servo motor is connected with one end of the driving rod, the other end of the driving rod is connected with an inner ring of the first bearing, and the supporting rod is fixedly arranged on two sides of an outer ring of the first bearing.

Further, the methanol spraying mechanism further comprises an air guide rod, a first spraying head and a second spraying head, the upper end of the air guide rod is fixedly connected with one side of the outer ring of the first bearing, the first spraying head is arranged at one end of the driving rod, and the second spraying head is arranged at the other end of the driving rod.

Further, first mechanism and the second mechanism constitution of suspending are the same, and first mechanism of suspending includes rotary disk and fixed disk, and rotary disk and fixed disk are laminated mutually, and the fixed outside that sets up at the actuating lever of rotary disk, the fixed outside that sets up at the actuating lever of fixed disk.

Furthermore, the rotary disk comprises a rotary sheet, a fixing frame, clamping sheets and a rubber pad, wherein the fixing frame is fixedly arranged on one side of the rotary sheet, the clamping sheets are fixedly arranged on the outer side of the rubber pad, two ends of the clamping sheets are fixedly connected with the fixing frame, and the rubber pad is arranged on the inner side of the fixing frame.

Furthermore, the rotating sheet starts to be provided with a first through hole, the middle part of the fixed disc is provided with a second bearing, the fixed disc is also provided with a second through hole, and the aperture of the first through hole is the same as that of the second through hole.

Furthermore, the outer side of the clamping piece protrudes out of the fixing frame, and the thickness of the forward protruding surface of the second through hole, which is opposite to the first through hole, is the same as the protruding thickness of the clamping piece.

The invention provides another technical scheme that: the coal liquefaction process of the multipurpose coal liquefaction device comprises the following steps:

s1: adding solid coal and oxygen-containing air separation gas into a gasification furnace, controlling the temperature at 550-580 ℃, adding the gasified mixed gas into a gas cooling device, and adding ash into an ash treatment device;

s2: the gas cooling device works, the treated liquid is injected into the water-vapor separation device, and the treated mixed gas is injected into the low-temperature methanol washing device;

s3: and collecting the synthesis gas treated by the low-temperature methanol washing device, and processing the oil-containing product treated by the low-temperature methanol washing device and the oil-containing product treated by the water-vapor separation device in a product processing device to generate tar or oil.

Further, the specific process steps of S2 are as follows:

s21: the gas cooling device discharges the mixed gas into a conveying pipe, the conveying pipe conveys the methanol to a first spray header through a gas guide rod and sprays the methanol to the gas, and meanwhile, a servo motor is started to drive a driving rod to rotate, so that the first spray header rotates to spray, and the mixed gas is subjected to physical absorption treatment;

s22: the driving rod rotates to drive the first buffering mechanism to rotate, a first through hole and a second through hole on the first buffering mechanism are opposite, and the primarily treated residual gas enters a conveying pipe where the second spray header is located so as to be subjected to secondary treatment;

s23: the same working principle as that of S21-S22, the gas after methanol absorption is discharged from the second suspension mechanism, and the low-temperature methanol washing treatment is completed primarily.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the multipurpose coal liquefaction device and the coal liquefaction process provided by the invention, the gas cooling device discharges mixed gas into the conveying pipe, the conveying pipe conveys methanol to the first spray header through the gas guide rod and sprays the methanol to the gas, the servo motor is started to drive the driving rod to rotate at the same time, so that the first spray header rotates to spray, the sprayed methanol can rotate and spray comprehensively under the rotating centrifugal force of the driving rod, and after the rotation is stable, the state of the sprayed methanol in the conveying pipe tends to be stable, and is not locally different, so that the methanol is sprayed more uniformly, the physical absorption of the methanol to the mixed gas is further improved, and the treatment effect of low-temperature methanol washing is improved.

2. The invention provides a multipurpose coal liquefaction device and a coal liquefaction process, wherein a driving rod rotates to drive a first temporary suspension mechanism to rotate while methanol rotary spraying is carried out, when a first through hole is opposite to a second through hole, gas starts to enter a conveying pipe where a second spray head is located to carry out secondary treatment, when the first through hole is staggered with the second through hole, the second through hole extrudes a clamping piece to enable the second through hole to be closed, at the moment, the flow of mixed gas in the conveying pipe where the conveying pipe is located is blocked, a certain time is reserved for buffer absorption, the physical absorption of the mixed gas by methanol is further improved, and the treatment effect of low-temperature methanol washing is improved.

Drawings

FIG. 1 is a schematic view of the overall process flow of the multi-purpose coal liquefaction plant of the present invention;

FIG. 2 is a schematic view of a partial three-dimensional structure of a low-temperature methanol washing device of the multipurpose coal liquefaction device according to the present invention;

fig. 3 is a schematic view of the internal three-dimensional structure of the circulation conveying pipeline of the multipurpose coal liquefaction device;

FIG. 4 is a schematic perspective view of a methanol spray mechanism of the multi-purpose coal liquefaction apparatus of the present invention;

FIG. 5 is a schematic view of a three-dimensional structure of the first and second suspending mechanisms of the multi-purpose coal liquefaction apparatus of the present invention;

fig. 6 is a schematic view of a mounting three-dimensional structure of a fixing disk of the multipurpose coal liquefaction device of the invention;

FIG. 7 is a schematic perspective view of a rotary disk of the multi-purpose coal liquefaction apparatus of the present invention;

FIG. 8 is a schematic view of the inner plane structure of the rotating disk of the multipurpose coal liquefaction device of the present invention.

In the figure: 1. a gasification furnace; 2. an ash treatment device; 3. a gas cooling device; 4. a water-vapor separation device; 5. a low-temperature methanol washing device; 51. a circulating delivery pipe; 511. a delivery pipe; 512. a first liquid collection cover; 513. a second liquid collection cover; 514. a liquid collecting pipe; 52. a methanol spraying mechanism; 521. a support housing; 5211. a servo motor; 522. a drive rod; 523. a first bearing; 524. a support rod; 525. an air guide rod; 526. a first shower head; 527. a second shower head; 53. a first buffering mechanism; 531. rotating the disc; 5311. rotating the sheet; 53111. a first through hole; 5312. a fixed mount; 5313. a clip; 5314. a rubber pad; 532. fixing the disc; 5321. a second bearing; 5322. a second through hole; 54. a second suspending mechanism; 55. a mixed methanol circulation mechanism; 6. product processing device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a multi-purpose coal liquefaction device, including gasifier 1, ash processing apparatus 2, gas cooling device 3, water vapor separation device 4, low temperature methyl alcohol washing device 5 and product processingequipment 6, the dust output of gasifier 1 passes through the pipe connection with ash processing apparatus 2's input, the mist output of gasifier 1 passes through the trachea with gas cooling device 3's input and is connected, gas cooling device 3's liquid output end and water vapor separation device 4's input lead to water piping connection, gas cooling device 3's gas output end and low temperature methyl alcohol washing device 5's input pass through the trachea and are connected, water vapor separation device 4 and low temperature methyl alcohol washing device 5's liquid output end are connected with product processingequipment 6.

Referring to fig. 2, a multi-purpose coal liquefaction device, a low-temperature methanol washing device 5 includes a circulation delivery pipe 51, a methanol spraying mechanism 52, a first suspension mechanism 53, a second suspension mechanism 54, and a mixed methanol circulation mechanism 55, the first suspension mechanism 53 and the second suspension mechanism 54 are both sleeved outside the methanol spraying mechanism 52, the methanol spraying mechanism 52 is disposed inside the delivery pipe 511, the circulation delivery pipe 51 includes a delivery pipe 511, a first liquid collecting cover 512, a second liquid collecting cover 513, and a liquid collecting pipe 514, the first liquid collecting cover 512 is disposed at a lower side of one end of the delivery pipe 511, and communicates with the delivery pipe 511, a second sump housing 513 is provided at the lower side of the other end of the delivery pipe 511, and is communicated with the delivery pipe 511, the lower ends of the first liquid collecting cover 512 and the second liquid collecting cover 513 are both connected with the liquid collecting pipe 514, the lower end of the liquid collecting pipe 514 is connected with the input end of the mixed methanol circulating mechanism 55, and the output end of the mixed methanol circulating mechanism 55 is connected with the methanol spraying mechanism 52.

Referring to fig. 3-4, in the multi-purpose coal liquefaction device, the methanol spray mechanism 52 includes a support shell 521, a drive rod 522, a first bearing 523 and a support rod 524, a servo motor 5211 is disposed inside the support shell 521, a drive end of the servo motor 5211 is connected to one end of the drive rod 522, the other end of the drive rod 522 is connected to an inner ring of the first bearing 523, and the support rod 524 is fixedly disposed at two sides of an outer ring of the first bearing 523.

The methanol spray mechanism 52 further comprises an air guide rod 525, a first spray head 526 and a second spray head 527, wherein the upper end of the air guide rod 525 is fixedly connected with one side of the outer ring of the first bearing 523, the first spray head 526 is arranged at one end of the driving rod 522, and the second spray head 527 is arranged at the other end of the driving rod 522.

Gas cooling device 3 emits the mist into conveyer pipe 511 in, conveyer pipe 511 carries first shower head 526 through leading gas pole 525 with methyl alcohol, and spray to gas, start servo motor 5211 simultaneously and drive actuating lever 522 and rotate, and then make first shower head 526 rotatory spray, under the rotatory centrifugal force of actuating lever 522, make spun methyl alcohol not only can rotate and spray comprehensively, and after the rotational stability, the state of spun methyl alcohol in conveyer pipe 511 tends towards stably, can not have local difference, make methyl alcohol spray more evenly, and then improve methyl alcohol and absorb the physics of mist, improve the treatment effect that low temperature methyl alcohol washed.

Referring to fig. 5-8, a multipurpose coal liquefaction device, the first suspension mechanism 53 and the second suspension mechanism 54 have the same structure, the first suspension mechanism 53 includes a rotating disk 531 and a fixed disk 532, the rotating disk 531 and the fixed disk 532 are attached, the rotating disk 531 is fixedly disposed at the outer side of the driving rod 522, the fixed disk 532 is fixedly disposed at the outer side of the driving rod 522, the rotating disk 531 includes a rotating plate 5311, a fixed frame 5312, a clamping plate 5313 and a rubber pad 5314, the fixed frame 5312 is fixedly disposed at one side of the rotating plate 5311, the clamping plate 5313 is fixedly disposed at the outer side of the rubber pad 5314, and both ends of the rubber pad 5314 are fixedly connected with the fixed frame 5312, the rubber pad 5314 is disposed at the inner side of the fixed frame 5312, the rotating plate 5311 starts to have a first through hole 53111, the middle portion of the fixed disk 532 is provided with a second bearing 5321, the fixed disk 532 is further provided with a second through hole 5322, the first through hole 53111 has, the thickness of the protrusion of the second through hole 5322 from the surface opposite to the first through hole 53111 is the same as the protrusion of the clip 5313.

When the methanol rotary spraying is carried out, the driving rod 522 rotates to drive the first buffering mechanism 53 to rotate, when the first through hole 53111 is opposite to the second through hole 5322, the gas starts to enter the conveying pipe 511 where the second spraying head 527 is located, secondary treatment is carried out, when the first through hole 53111 is staggered with the second through hole 5322, the second through hole 5322 extrudes the clamping piece 5313, the second through hole 5322 is closed, the flow of the mixed gas in the conveying pipe 511 where the conveying pipe 511 is located is blocked, and a certain time is reserved for buffer absorption, so that the physical absorption of the methanol on the mixed gas is further improved, and the treatment effect of low-temperature methanol washing is improved.

The invention provides another technical scheme that: the coal liquefaction process of the multipurpose coal liquefaction device comprises the following steps:

the method comprises the following steps: adding solid coal and oxygen-containing air separation gas into a gasification furnace 1, controlling the temperature at 550-580 ℃, adding the gasified mixed gas into a gas cooling device 3, and adding ash into an ash treatment device 2;

step two: the gas cooling device 3 works, the gas cooling device 3 discharges the mixed gas into the delivery pipe 511, the delivery pipe 511 delivers the methanol to the first spray header 526 through the gas guide rod 525 and sprays the methanol to the gas, and simultaneously the servo motor 5211 is started to drive the driving rod 522 to rotate, so that the first spray header 526 rotates to spray, and the mixed gas is subjected to physical absorption treatment; the driving rod 522 rotates to drive the first suspension mechanism 53 to rotate, the first through hole 53111 on the first suspension mechanism 53 is opposite to the second through hole 5322, and the primarily treated residual gas enters the conveying pipe 511 where the second spray header 527 is located, so as to perform secondary treatment; finally, the gas absorbed by the methanol is discharged from the second temporary suspension mechanism 54, and the low-temperature methanol washing treatment is completed preliminarily; injecting the treated liquid into a water-vapor separation device 4, and injecting the treated mixed gas into a low-temperature methanol washing device 5;

step three: and collecting the synthesis gas treated by the low-temperature methanol washing device 5, and processing the oil-containing product treated by the low-temperature methanol washing device 5 and the oil-containing product treated by the water-vapor separation device 4 in a product processing device 6 to generate tar or oil.

In summary, the following steps: the invention relates to a multi-purpose coal liquefaction device and a coal liquefaction process, which comprises a gasification furnace 1, an ash treatment device 2, a gas cooling device 3, a water-vapor separation device 4, a low-temperature methanol washing device 5 and a product processing device 6, wherein the gas cooling device 3 discharges mixed gas into a conveying pipe 511, the conveying pipe 511 conveys methanol to a first spray head 526 through a gas guide rod 525 and sprays the methanol to the gas, a servo motor 5211 is started to drive a driving rod 522 to rotate, so that the first spray head 526 rotates to spray, the sprayed methanol can rotate and spray completely under the rotating centrifugal force of the driving rod 522, and after the rotation is stable, the state of the sprayed methanol in the conveying pipe 511 tends to be stable without local difference, so that the methanol spraying is more uniform, the physical absorption of the methanol to the mixed gas is improved, and the treatment effect of the low-temperature methanol washing is improved, when the methanol rotary spraying is carried out, the driving rod 522 rotates to drive the first buffering mechanism 53 to rotate, when the first through hole 53111 is opposite to the second through hole 5322, the gas starts to enter the conveying pipe 511 where the second spraying head 527 is located, secondary treatment is carried out, when the first through hole 53111 is staggered with the second through hole 5322, the second through hole 5322 extrudes the clamping piece 5313, the second through hole 5322 is closed, the flow of the mixed gas in the conveying pipe 511 where the conveying pipe 511 is located is blocked, and a certain time is reserved for buffer absorption, so that the physical absorption of the methanol on the mixed gas is further improved, and the treatment effect of low-temperature methanol washing is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.