CN211595544U

CN211595544U - Coal chemical industry hydropyrolysis system

Info

Publication number: CN211595544U
Application number: CN201922426920.0U
Authority: CN
Inventors: 吕宜德; 吕元; 吕复
Original assignee: Wuhan Aojie Technology Corp
Current assignee: Wuhan Aojie Technology Corp
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-09-29
Anticipated expiration: 2029-12-28

Abstract

The utility model relates to a coal industry hydropyrolysis system, including the pyrolysis device, the pyrolysis device includes pyrolysis chamber and heat exchange tube group, heat exchange tube group sets up in the pyrolysis chamber, and heat exchange tube group is three-dimensional netted heat transfer structure. The utility model discloses the during operation flue gas mixture can directly get into from the flue gas entry at pyrolysis chamber top, realizes the heat transfer with the three-dimensional netted heat exchange tube group of pyrolysis intracavity portion, and not only heat exchange efficiency is high and more difficult deposit, and the pyrolysis device of this kind of structure does not have the middle part hollow moreover, has reduced the waste in central space.

Description

Coal chemical industry hydropyrolysis system

Technical Field

The utility model relates to a coal processing technology field, concretely relates to coal chemical industry hydropyrolysis system.

Background

Coal pyrolysis is a key step in coal conversion, and coal gasification, liquefaction, coking and combustion all undergo or undergo pyrolysis processes. Throughout the various coal pyrolysis technologies at home and abroad, especially the engineering technologies applied practically, the technical difficulties of high energy consumption, large environmental pollution, poor coal adaptability and the like are not well solved. In recent years, the coal grading conversion technology gradually becomes a hotspot of a novel coal conversion technology due to the advantages of high overall thermal efficiency, convenience in removing coal pollutants and the like. The indirect heat exchange coal pyrolysis device has a good gas-solid separation effect, and the purity and concentration of pyrolysis products are high, so that the indirect heat exchange coal pyrolysis device is widely concerned in the technical field. But the heat exchange effect is poor and is not competitive.

In patent document CN201520845732.0, a coil type coal pyrolysis apparatus is disclosed, which has the following problems: (1) the middle part is of a hollow structure, so that the central part of the equipment wastes space; (2) due to the hollow structure, the annular narrow cavity needs an inner heat insulation layer and an outer heat insulation layer for heat insulation, the usage amount of the heat insulation layer is increased, and the exposed area of the heat exchange space is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who exists among the prior art, provide a coal industry hydropyrolysis system, solve that pyrolysis device heat transfer effect is poor and the middle part is hollow structure, the problem of extravagant space and insulating layer use amount.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

the utility model provides a coal industry hydropyrolysis system, includes the pyrolysis device, the pyrolysis device includes pyrolysis chamber and heat exchange tube group, heat exchange tube group sets up in the pyrolysis chamber, and heat exchange tube group is three-dimensional netted heat transfer structure.

The utility model has the advantages that: the flue gas mixture can directly get into from the flue gas entry at pyrolysis chamber top, realizes the heat transfer with the inside three-dimensional netted heat exchange tube group in pyrolysis chamber, and not only heat exchange efficiency is high and more difficult deposit, and the pyrolysis device of this kind of structure does not have the middle part moreover and is hollow, has reduced the waste in central space.

On the basis of the technical scheme, the utility model discloses can also make following improvement.

Furthermore, the heat exchange tube group is formed by a plurality of S-shaped bent pipelines which are arranged in parallel at intervals along the horizontal direction.

Furthermore, the heat exchange tube sets are divided into two groups, and the pipelines of the two heat exchange tube sets are crossed in a staggered manner.

Furthermore, the bent part of the heat exchange tube group pipeline is arc-shaped.

Furthermore, a flue gas inlet is formed in the top of the pyrolysis cavity, and a flue gas outlet is formed in the bottom of the pyrolysis cavity.

Furthermore, the inlet of the heat exchange tube set is positioned at the lower end of the pyrolysis cavity, and the outlet of the heat exchange tube set is positioned at the upper end of the pyrolysis cavity.

Furthermore, a heat insulating layer is arranged on the inner wall of the pyrolysis cavity.

The beneficial effect of adopting the further scheme is that: the heat dissipation area is reduced, the heat exchange efficiency is improved, the usage amount of the heat insulation layer is reduced, and the cost is reduced; the pulverized coal and the high-temperature flue gas move in the reverse direction, so that the heat exchange is more sufficient, the flue gas temperature is low, and the energy consumption is low; the bent part of the heat exchange tube group is arc-shaped, so that the resistance of pulverized coal and conveying gas can be reduced.

Drawings

FIG. 1 is a schematic view of the internal structure of a pyrolysis device in a pyrolysis system according to the present invention;

fig. 2 is a schematic structural view of a three-dimensional portion of a heat exchange tube set in the pyrolysis apparatus of the present invention;

fig. 3 is a schematic view of a three-dimensional structure of a pyrolysis device in a pyrolysis system of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

10. the device comprises a pyrolysis cavity 11, a flue gas inlet 12, a flue gas outlet 13, a heat insulation layer 20 and a heat exchange tube set.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

It is to be understood that the terms "upper," "lower," "left," "right," and the like are used merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the components or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered as limiting.

Examples

As shown in fig. 1 to 3, a coal chemical industry hydropyrolysis system comprises a pyrolysis device, wherein the pyrolysis device comprises a pyrolysis cavity 10 and a heat exchange tube group 20, a flue gas inlet 11 is arranged at the top of the pyrolysis cavity 10, and a flue gas outlet 12 is arranged at the bottom of the pyrolysis cavity 10; the main heat exchange part of the heat exchange tube group 20 is arranged in the pyrolysis cavity 10, the heat exchange tube group 20 is formed by a plurality of S-shaped bent pipelines arranged in parallel at intervals along the horizontal direction, the heat exchange tube groups 20 are two in number, and the pipelines of the two heat exchange tube groups 20 are staggered and crossed, so that a three-dimensional net-shaped heat exchange structure is formed in the pyrolysis cavity 10.

Raw coal is dried and ground into pulverized coal with the granularity of less than or equal to 6mm, the environmental pressure of the pulverized coal is improved by a gas pressurizing device, and the pulverized coal and conveying gas are fully mixed in a pneumatic conveying mode. The mass ratio of the pulverized coal to the conveying gas is 18, and a mixture of the conveying gas and the pulverized coal generated in the pyrolysis process moves at a high speed of 15m/s in the heat exchange tube, so that the heat exchange efficiency is increased, and deposition is avoided. The flue gas mixture can directly get into from the flue gas entry 11 at pyrolysis chamber 10 top, realizes the heat transfer with the inside three-dimensional netted heat transfer tube bank 20 in pyrolysis chamber 10, and not only heat exchange efficiency is high and more difficult deposit, and the pyrolysis device of this kind of structure does not have the middle part hollow moreover, has reduced the waste of central space.

The inner wall of the pyrolysis chamber 10 is provided with a heat insulating layer 13. The pyrolysis cavity 10 only has heat dissipation on the outer cavity wall, so that only one heat insulation layer 13 is needed, the heat dissipation area is reduced, the heat exchange efficiency is improved, and meanwhile, the use amount of the heat insulation layer is reduced, and the cost is reduced.

Specifically, the inlet of the heat exchange tube group 20 is located at the lower end of the pyrolysis chamber 10, and the outlet of the heat exchange tube group 20 is located at the upper end of the pyrolysis chamber 10; the flue gas inlet 11 is located at the top of the pyrolysis chamber 10 and the flue gas outlet 12 is located at the bottom of the pyrolysis chamber 10. The inlet and outlet positions of the flue gas inlet 11 and the flue gas outlet 12 are opposite to the inlet and outlet positions of the heat exchange tube group 20.

The pulverized coal and the conveying gas enter from the inlet at the lower end of the heat exchange tube set 20, move and exchange heat in the heat exchange coil in a pneumatic conveying mode higher than the atmospheric pressure and accompany with the pyrolysis process, and the generated high-temperature semicoke, pyrolysis gas, tar and conveying gas are discharged from the outlet of the heat exchange tube set 20 at the upper end of the pyrolysis cavity 10 together for subsequent separation and treatment procedures. Meanwhile, high-temperature flue gas enters the pyrolysis cavity 10 from a top flue gas inlet 11 of the pyrolysis cavity 10, and exchanges heat with the heat exchange tube group 20 in the pyrolysis cavity 10; the flue gas after heat exchange and temperature reduction is discharged from a flue gas outlet 12 at the bottom of the pyrolysis cavity 10. The inlet and outlet positions of the flue gas inlet 11 and the flue gas outlet 12 are opposite to the inlet and outlet positions of the heat exchange tube group 20, so that the pulverized coal and the high-temperature flue gas move in a reverse direction, the heat exchange is more sufficient, the flue gas temperature is low, and the energy consumption is low.

The bent part of the heat exchange tube set 20 is arc-shaped, so that the resistance of pulverized coal and conveying gas can be reduced.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The coal chemical industry hydropyrolysis system comprises a pyrolysis device, wherein the pyrolysis device comprises a pyrolysis cavity (10) and a heat exchange tube set (20), and is characterized in that the heat exchange tube set (20) is arranged in the pyrolysis cavity (10), and the heat exchange tube set (20) is of a three-dimensional net-shaped heat exchange structure.

2. The coal chemical industry hydropyrolysis system according to claim 1, wherein the heat exchange tube set (20) is formed by a plurality of S-shaped bent pipes which are arranged side by side at intervals along the horizontal direction.

3. The coal chemical industry hydropyrolysis system according to claim 2, wherein the heat exchange tube sets (20) have two sets, and the tube directions of the two sets of heat exchange tube sets (20) are staggered and crossed.

4. The coal chemical industry hydropyrolysis system according to claim 3, wherein the bend of the heat exchange tube set (20) is arc-shaped.

5. The coal chemical industry hydropyrolysis system according to any one of claims 1 to 4, wherein a flue gas inlet (11) is arranged at the top of the pyrolysis chamber (10), and a flue gas outlet (12) is arranged at the bottom of the pyrolysis chamber (10).

6. The coal chemical industry hydropyrolysis system according to claim 5, wherein the inlet of the heat exchange tube set (20) is located at the lower end of the pyrolysis chamber (10), and the outlet of the heat exchange tube set (20) is located at the upper end of the pyrolysis chamber (10).

7. The coal chemical industry hydropyrolysis system according to claim 6, wherein the inner wall of the pyrolysis chamber (10) is provided with a heat insulating layer (13).