CN210915935U - Integrative stove and system of fine coal pyrolysis and semicoke activation - Google Patents
Integrative stove and system of fine coal pyrolysis and semicoke activation Download PDFInfo
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- CN210915935U CN210915935U CN201921986365.0U CN201921986365U CN210915935U CN 210915935 U CN210915935 U CN 210915935U CN 201921986365 U CN201921986365 U CN 201921986365U CN 210915935 U CN210915935 U CN 210915935U
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Abstract
The utility model provides a pulverized coal pyrolysis and semicoke activation integrated furnace and system, the pulverized coal pyrolysis and semicoke activation integrated furnace comprises a furnace body (10), a partition plate (11) is arranged in the furnace body (10), a pyrolysis reaction area (12) is formed above the partition plate (11), an activation area (13) is formed below the partition plate (11), and the pyrolysis reaction area (12) is communicated with the activation area (13) through a discharging pipe (14); a heat medium inlet (15) and a coal powder inlet (16) are arranged above the pyrolysis reaction zone (12), a crude gas outlet (17) is arranged at the upper part of the activation zone (13), an overflow pipe (18) is arranged at the middle part of the activation zone (13), and an activated gas conveying system and a slag discharge pipe (19) are arranged at the bottom of the activation zone (13). The utility model realizes the purpose of simultaneously carrying out pyrolysis and activation in a furnace body, realizes the direct production of active coke and coproduction of crude gas and tar by pulverized coal, and has short process flow.
Description
Technical Field
The utility model relates to a coal gasification field, concretely relates to integrative stove of fine coal pyrolysis and semicoke activation and system.
Background
In recent years, coal grading and quality-grading conversion becomes an important direction for realizing clean and efficient utilization of coal, and as one of coal grading and quality-grading conversion technologies, a rapid pulverized coal pyrolysis technology has the characteristics of high oil yield, simple oil product composition, high thermal efficiency and the like, and has attracted wide attention. However, a large amount of solid semicoke is generated in the process of fast pyrolysis of pulverized coal, and if the semicoke can be utilized with high added value, the economic efficiency of the technology is greatly influenced. The method for preparing the active coke by the pulverized coal through pyrolysis and activation is one of application directions for improving the high added value of the semicoke. In the traditional method, the preparation of the semicoke by the pyrolysis of the pulverized coal and the preparation of the active coke by the activation of the semicoke are two independent processes, the process flow is long, a plurality of devices are needed in the process, and the investment of the devices and the energy consumption in the production process are increased invisibly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an integrative stove and system of fine coal pyrolysis and semicoke activation to it is complicated to solve prior art fine coal pyrolysis preparation semicoke and the active burnt process of semicoke activation system, the longer problem of process flow.
In order to achieve the above object, the utility model firstly provides a pulverized coal pyrolysis and semicoke activation integrated furnace, which comprises a furnace body, wherein a partition plate is arranged in the furnace body, a pyrolysis reaction area is formed above the partition plate, an activation area is formed below the partition plate, and the pyrolysis reaction area is communicated with the activation area through a blanking pipe;
the device is characterized in that a heat medium inlet and a coal powder inlet are arranged above the pyrolysis reaction area, a crude gas outlet is arranged at the upper part of the activation area, an overflow pipe is arranged at the middle part of the activation area, and an activated gas conveying system and a slag discharge pipe are arranged at the bottom of the activation area.
Optionally, the inner wall of the furnace body is provided with a layer of filling refractory material.
Optionally, the dividing plate is conical in shape.
Optionally, a filter screen is arranged in the blanking pipe.
Optionally, the mesh size of the screen is greater than 750 mesh.
Optionally, the activation gas delivery system comprises a gas distribution plate and a central jet pipe, and the gas distribution plate and the central jet pipe are both used for delivering the activation gas to the activation area.
Optionally, the gas distribution plate is conical;
the outlet of the central jet pipe is positioned at the central position of the bottom of the activation area, and the outlet direction is vertical upwards.
Optionally, the outlet of the blanking pipe faces the outlet of the central jet pipe.
Optionally, the blanking tube is inserted below the bed of char in the activation zone.
Another aspect of the utility model provides a pulverized coal pyrolysis and semicoke activation system, which comprises a cooler and the pulverized coal pyrolysis and semicoke activation integrated furnace provided by the utility model;
the overflow pipe is communicated with the cooler, and the cooler is provided with an active coke outlet.
Through set up the partition plate in same furnace body to form pyrolysis reaction district and activation area, carry out pyrolysis reaction in the pyrolysis reaction district, activated semicoke in the activation area, thereby realized carrying out pyrolysis and activation's purpose simultaneously at a furnace body, realized that fine coal directly produces active coke and coproduction coarse coal gas and tar, the process flow is short. The upper pyrolysis reaction zone adopts an entrained flow bed form, so that the volatile component removal reaction is convenient, and the oil yield is high; the lower activation zone adopts a fluidized bed form, the activation medium is fully contacted with the semicoke, the activation time can be ensured, and the activation effect is good.
Drawings
FIG. 1 is a schematic view of an integrated furnace for pyrolysis of pulverized coal and activation of semicoke according to an embodiment of the present invention;
fig. 2 is a schematic view of a pulverized coal pyrolysis and semicoke activation system according to an embodiment of the present invention.
Reference numerals:
10-a furnace body; 11-dividing the plate; 12-a pyrolysis reaction zone; 13-an activation region; 14-a blanking pipe; 15-heat medium inlet; 16-a pulverized coal inlet; 17-a raw gas outlet; 18-an overflow pipe; 19-a slag discharge pipe; 20-filling a refractory material; 21-a filter screen; 22-a gas distribution plate; 23-a central jet pipe;
30-a cooler; 31-active coke outlet.
Detailed Description
In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are some, but not all embodiments of the invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
Referring to fig. 1, the present embodiment provides a pulverized coal pyrolysis and semicoke activation integrated furnace, including a furnace body 10, a dividing plate 11 is disposed in the furnace body 10, a pyrolysis reaction region 12 is formed above the dividing plate 11, and is in the form of an entrained flow bed; an activation zone 13 is formed below the dividing plate 11 and is in a fluidized bed form; the pyrolysis reaction zone 12 and the activation zone 13 are communicated through a feeding pipe 14; a heat medium inlet 15 and a coal powder inlet 16 are arranged above the pyrolysis reaction area 12, a crude gas outlet 17 is arranged at the upper part of the activation area 13, an overflow pipe 18 is arranged at the middle part of the activation area 13, and an activated gas conveying system and a slag discharge pipe 19 are arranged at the bottom of the activation area 13. The cutting plate 11 is arranged in the same furnace body 10 to form a pyrolysis reaction area 12 and an activation area 13, pyrolysis reaction is carried out in the pyrolysis reaction area 12, and semicoke is activated in the activation area 13, so that the aim of simultaneously carrying out pyrolysis and activation in one furnace body is fulfilled, the direct production of active coke and the coproduction of crude gas and tar by using pulverized coal are realized, and the process flow is short. The upper pyrolysis reaction zone 12 adopts an entrained flow bed form, so that the volatile component removal reaction is convenient, and the oil yield is high; the lower activation zone 13 adopts a fluidized bed form, the activation medium is fully contacted with the semicoke, the activation time can be ensured, and the activation effect is good.
In the present embodiment, a layer of the refractory filler 20 is provided on the inner wall of the furnace body 10. The filled refractory 20 has the purposes of heat preservation and furnace body strength enhancement, and the heat loss is greatly reduced.
In order to facilitate the collection of the semicoke, the dividing plate 11 is shaped like a cone, see in particular fig. 1. It is obvious to those skilled in the art that the partition plate 11 may be provided with other shapes and structures as required, for example: spherical, circular, etc.
In a specific embodiment, a filter screen 21 is arranged in the feeding pipe 14 and is used for filtering the semicoke in the raw gas, the raw gas is discharged out of the furnace body 10 through the raw gas outlet 17 through the filter screen 21 and is stored or used for other equipment, and the filtered semicoke falls into a semicoke layer for activation.
The screen 21 is located on the upper part of the fluidized semicoke layer, and the size of the screen 21 is smaller than d10 (10% corresponding to the particle size) and smaller than 20 μm, specifically: the aperture of the filter screen 21 should be larger than 750 mesh, such as 760 mesh, 770 mesh, 780 mesh, etc.
Wherein, the activating gas conveying system comprises a gas distribution plate 22 and a central jet pipe 23, and both the gas distribution plate 22 and the central jet pipe 23 are used for conveying the activating gas to the activation area 13. The gas inlet of the gas distribution plate 22 is connected to the delivery pipe of the central jet pipe 23, and branches the activated gas on the delivery pipe of the central jet pipe 23. A plurality of uniformly distributed air distribution holes are formed on the gas distribution plate 22, and the activated gas passes through the gas distribution plate 22 and then contacts with the semicoke for fluidization; the bottom central jet pipe 23 is positioned in the center of the slag discharge pipe 19, and the activated gas is ejected from the central jet pipe 23 and is used for dispersing the semicoke and preventing the semicoke from falling into the slag discharge pipe 19.
Wherein the gas distribution plate 22 is conical; the outlet of the central jet pipe 23 is located at the central position of the bottom of the activation zone 13, and the outlet direction is vertical upwards. A conical gas distribution plate 22 surrounds the central jet pipe 23.
For the length setting of the blanking pipe 14, it is preferable that the blanking pipe 14 is inserted below the semi-coke bed layer of the activation zone 13. The resistance of the semicoke bed layer is kept to be larger than that of the filter screen 21, so that the continuity of gas-solid separation is ensured.
Further, in a preferred scheme, the outlet of the blanking pipe 14 faces the outlet of the central jet pipe 23. The structural arrangement enables the semicoke falling from the outlet of the blanking pipe 14 to be directly blown by the central jet pipe 23, enhances the air flow disturbance in the activation zone 13 and enables the semicoke to be distributed more uniformly.
With reference to fig. 2, the present embodiment further provides a system for pyrolyzing and activating semi-coke of pulverized coal, which includes a cooler 30 and the integrated furnace for pyrolyzing and activating pulverized coal and semi-coke provided by the present embodiment; the overflow pipe 18 is communicated with the cooler 30, and the cooler 30 is opened with an active coke outlet 31. And the semicoke enters the cooler 30 through the overflow pipe 18 to be cooled to obtain the semicoke meeting the temperature requirement, and the semicoke is discharged from the active coke outlet 31 and stored.
To describe the scheme provided by this embodiment in more detail, the following further describes the operation process of a specific system for pyrolyzing and activating pulverized coal and semicoke, specifically as follows:
the pulverized coal and the thermal medium are fully mixed in the pyrolysis reaction zone 12 to generate pyrolysis reaction, and crude gas, semicoke and tar are generated. The heat medium may be an inert medium, synthesis gas or hydrogen, preferably hydrogen. Products generated by pyrolysis are collected at the bottom of the pyrolysis reaction zone 12 and enter the activation zone 13 through a feeding pipe 14. And in the process that the product enters the activation zone 13 through the discharge pipe 14, gas-solid separation is carried out at the position of the filter screen 21, the gas enters the upper part of the activation zone 13 through the side wall of the filter screen 21 and enters the purification unit from the crude gas outlet 17 at the upper part of the activation zone 13, and the purified gas is stored for use. The solid is intercepted by the filter screen 21 and falls into a slag discharge pipe 19 at the bottom of the activation zone 13 to be discharged, the blanking pipe 14 is inserted into the semicoke bed layer, and the resistance of the semicoke bed layer is kept to be larger than that of the screen mesh so as to ensure the continuity of gas-solid separation. Because the central axis of the central jet pipe 23 is coincident with the central axis of the blanking pipe 14 and is positioned in the slag discharge pipe 19, the semicoke falls from the blanking pipe 14 and is scattered by the gas inside the central jet pipe 23, and is dispersed into a semicoke layer, and the semicoke after being dispersed is in a fluidized state under the action of the activated gas of the gas distribution plate 22 and is subjected to semicoke activation reaction. To ensure the activation effect under certain activation conditions (namely the specific surface area of the activated coke is more than or equal to 600 m)2Per gram and specific pore volume is more than or equal to 0.1cm3/g), central jet pipe 23 andthe activating gas of the gas distribution plate 22 is water vapor or CO2Water vapor is preferred. The semicoke with larger particle size and the large-particle refractory falling from the activation region 13 fall into the slag hopper through the gap between the central jet pipe 23 and the slag discharge pipe 19. The activated active coke is conveyed to the cooler 30 from the overflow pipe 18, and is discharged to a product tank for later use after the temperature is reduced to be less than or equal to 40 ℃.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The integrated furnace for pyrolyzing the pulverized coal and activating the semicoke is characterized by comprising a furnace body (10), wherein a partition plate (11) is arranged in the furnace body (10), a pyrolysis reaction area (12) is formed above the partition plate (11), an activation area (13) is formed below the partition plate (11), and the pyrolysis reaction area (12) is communicated with the activation area (13) through a discharging pipe (14);
a heat medium inlet (15) and a coal powder inlet (16) are arranged above the pyrolysis reaction area (12), a crude gas outlet (17) is arranged on the upper portion of the activation area (13), an overflow pipe (18) is arranged in the middle of the activation area (13), and an activated gas conveying system and a slag discharge pipe (19) are arranged at the bottom of the activation area (13).
2. The integrated furnace for pulverized coal pyrolysis and semicoke activation as claimed in claim 1, wherein the inner wall of the furnace body (10) is provided with a layer of filling refractory (20).
3. The integrated furnace for pulverized coal pyrolysis and semicoke activation as claimed in claim 1, wherein the shape of the partition plate (11) is conical.
4. The integrated furnace for pulverized coal pyrolysis and semicoke activation as claimed in claim 1, wherein a screen (21) is arranged in the blanking pipe (14).
5. The integrated furnace for pulverized coal pyrolysis and semicoke activation as claimed in claim 4, wherein the aperture range of the filter screen (21) is larger than 750 meshes.
6. The pulverized coal pyrolysis and semicoke activation integrated furnace as claimed in claim 1, wherein the activation gas delivery system comprises a gas distribution plate (22) and a central jet pipe (23), and the gas distribution plate (22) and the central jet pipe (23) are used for delivering activation gas to the activation zone (13).
7. The integrated furnace for pulverized coal pyrolysis and semicoke activation as claimed in claim 6, wherein the gas distribution plate (22) is conical;
the outlet of the central jet pipe (23) is positioned at the central position of the bottom of the activation zone (13), and the outlet direction is vertical upwards.
8. The integrated furnace for pulverized coal pyrolysis and semicoke activation as claimed in claim 7, wherein an outlet of the blanking pipe (14) is directed to an outlet of the central jet pipe (23).
9. The integrated furnace for pyrolysis of pulverized coal and activation of semicoke as claimed in claim 1, wherein the feed pipe (14) is inserted below the layer of semicoke in the activation zone (13).
10. A pulverized coal pyrolysis and semicoke activation system, characterized by comprising a cooler (30) and the integrated furnace of pulverized coal pyrolysis and semicoke activation according to any one of claims 1 to 9;
the overflow pipe (18) is communicated with the cooler (30), and the cooler (30) is provided with an active coke outlet (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921986365.0U CN210915935U (en) | 2019-11-18 | 2019-11-18 | Integrative stove and system of fine coal pyrolysis and semicoke activation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921986365.0U CN210915935U (en) | 2019-11-18 | 2019-11-18 | Integrative stove and system of fine coal pyrolysis and semicoke activation |
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| CN210915935U true CN210915935U (en) | 2020-07-03 |
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| CN201921986365.0U Active CN210915935U (en) | 2019-11-18 | 2019-11-18 | Integrative stove and system of fine coal pyrolysis and semicoke activation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159674A (en) * | 2020-09-30 | 2021-01-01 | 山东大学 | Method, system and process for preparing powdery active coke in two-stage mode through pulverized coal carbonization and activation |
| CN112226241A (en) * | 2020-09-30 | 2021-01-15 | 山东大学 | System and method for co-producing coal gas and powdery active coke |
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2019
- 2019-11-18 CN CN201921986365.0U patent/CN210915935U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159674A (en) * | 2020-09-30 | 2021-01-01 | 山东大学 | Method, system and process for preparing powdery active coke in two-stage mode through pulverized coal carbonization and activation |
| CN112226241A (en) * | 2020-09-30 | 2021-01-15 | 山东大学 | System and method for co-producing coal gas and powdery active coke |
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