CN212293455U - Annular cavity structure of pressurized gasification furnace and annular cavity pressure control loop - Google Patents
Annular cavity structure of pressurized gasification furnace and annular cavity pressure control loop Download PDFInfo
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- CN212293455U CN212293455U CN202020775143.0U CN202020775143U CN212293455U CN 212293455 U CN212293455 U CN 212293455U CN 202020775143 U CN202020775143 U CN 202020775143U CN 212293455 U CN212293455 U CN 212293455U
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Abstract
The utility model provides a safe and reliable's pressure control loop of ring cavity structure and ring cavity of pressurized gasification stove. The annular cavity structure of the pressurized gasifier comprises a shell, a furnace mouth and a slag hole, wherein an annular gap gas inlet is formed in the upper portion of the shell, a water-cooled wall structure is arranged in the shell and comprises an upper water-cooled wall, a water-cooled wall and a lower water-cooled wall which are arranged from top to bottom, an annular cavity is formed between the outer wall of the water-cooled wall and the inner wall of the shell, sealing structures are arranged between the upper water-cooled wall and the shell and between the lower water-cooled wall and the shell, and an annular cavity pressure control loop is connected outside the annular cavity structure of.
Description
Technical Field
The utility model relates to a gasifier, concretely relates to ring cavity structure and ring cavity pressure control circuit of pressurized gasifier.
Background
The coal gasification technology is a core technology for high-efficiency and clean utilization of coal, wherein the pressurized coal gasification technology needs high-temperature and high-pressure reaction conditions, and in order to protect a gasification furnace shell from being damaged by high temperature and high pressure, a lining is required to be arranged in a gasification furnace, and two types of refractory bricks and water-cooled walls are commonly used. At present, both the pulverized coal furnace and the coal water slurry gasification furnace can adopt a water-cooled wall gasification furnace. In order to protect the gasification furnace shell from being influenced by high temperature, a gap is generally reserved between the water-cooled wall and the gasification furnace shell, and protective gas is continuously introduced into the annular cavity, so that on one hand, high-temperature synthetic gas of a combustion chamber of the gasification furnace is prevented from being communicated into the annular cavity to cause high temperature of the annular gap, on the other hand, radiant heat of the water-cooled wall can be taken away, and the wall temperature of the gasification furnace shell is reduced.
In the existing gasification furnace ring cavity structure, in order to increase the effective volume of a combustion chamber, the ring cavity space is very small, people cannot enter the ring cavity, the installation position of a temperature measuring point of the gasification furnace is limited, an upper end socket of the gasification furnace is generally connected by a flange, and the flange is easy to leak. Because the water wall types adopted by different furnace types are different, the upper and lower extension and sealing of the water wall are different, and the flow direction of the annular gap gas has two directions of a furnace opening and a slag opening, so that the annular gap gas is not completely circulated in the annular cavity. On the other hand, the usage amount of the protective gas of the ring cavity is larger, and the effective gas components of the gasification furnace are reduced. At present, the annular cavity pressure control method generally controls annular cavity pressure by controlling annular gap gas flow, although annular cavity pressure and combustion chamber pressure have a pressure difference display alarm, the pressure at the joint of the annular cavity and the combustion chamber is easy to be balanced in a very short time by simply adjusting the annular gap gas flow, a small amount of synthetic gas is mixed into the annular cavity, and long time is needed for replacing the high-temperature synthetic gas which is diffused in the annular cavity and then enters the combustion chamber again, so that the annular gap temperature is high.
SUMMERY OF THE UTILITY MODEL
In order to solve one of the problems existing in the prior art, the utility model provides a ring cavity structure and a ring cavity pressure control loop of a pressurized gasification furnace.
The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:
the annular cavity structure of the pressurized gasifier comprises a shell, a furnace mouth and a slag hole, wherein an annular gap gas inlet is formed in the upper portion of the shell, a water-cooled wall structure is arranged in the shell and comprises an upper water-cooled wall, a water-cooled wall and a lower water-cooled wall which are arranged from top to bottom, an annular cavity is formed between the outer wall of the water-cooled wall and the inner wall of the shell, sealing structures are arranged between the upper water-cooled wall and the shell and between the lower water-cooled wall and the shell, and an annular cavity pressure control loop is connected outside the annular cavity structure of.
On the basis of the ring cavity structure of the pressurized gasification furnace, the upper water-cooled wall is arranged at the furnace mouth and is provided with an upper cold water wall inlet and an upper cold water wall outlet, and the upper water-cooled wall is in butt joint sealing with the water-cooled wall outlet header.
On the basis of the annular cavity structure of the pressurized gasification furnace, the annular gap between the water-cooled wall outlet header and the upper water-cooled wall is filled with refractory materials.
On the basis of the annular cavity structure of the pressurized gasification furnace, the lower water-cooling wall is arranged at the slag hole through the middle partition plate and is provided with a lower water-cooling wall inlet and a lower water-cooling wall outlet.
On the basis of the annular cavity structure of the pressurized gasification furnace, the inlet and the outlet of the cold water wall are connected with the lower water cooling wall through the intermediate partition plate cylinder section, and the intermediate partition plate cylinder section is arranged on the intermediate partition plate.
On the basis of the ring cavity structure of the pressurized gasification furnace, the upper part of the water-cooled wall is suspended on the upper part of the shell through the water-cooled wall outlet header, the water-cooled wall is provided with a water-cooled wall water inlet and a water-cooled wall water outlet, the water-cooled wall water inlet is connected with the water-cooled wall inlet header, the water-cooled wall inlet header is positioned below the water-cooled wall, and the water-cooled wall inlet header is provided with a sewage discharge outlet of the water-cooled wall inlet header.
On the basis of the annular cavity structure of the pressurized gasifier, the annular gap between the water wall inlet header shell ring and the intermediate partition plate shell ring of the water wall inlet header is filled with refractory materials.
On the basis of the ring cavity structure of the pressurized gasification furnace, the diameter of the outer wall of the water-cooled wall is smaller than that of the inner wall of the shell, and a manhole is arranged on the side wall of the shell.
The utility model provides a pressure control loop of ring cavity of pressure gasification stove's ring cavity structure, connects outside the pressure gasification stove's ring cavity structure, ring cavity pressure control loop includes ring cavity pressure and combustion chamber pressure difference detecting component, annular gap gas flow control valve and annular gap gas flowmeter, ring cavity pressure and combustion chamber pressure difference detecting component are including setting up at fire and examining pressure valve I that nitrogen gas sweeps the pipeline, set up at annular gap pressure pipeline's pressure taking valve II, connect pressure taking valve I and pressure taking valve II's diaphragm differential pressure transmitter, set up at annular gap gas inlet line's annular gap gas flow control valve and annular gap gas flow, annular gap gas gets into the pipeline and connects annular gap gas import.
The utility model has the advantages that:
1. the annular space gas enters from the upper part of the gasification furnace and exits from the lower part of the water-cooled wall, and can carry away part of the radiant heat of the water-cooled wall, thereby effectively reducing the temperature of the shell, reducing the influence of high annular space temperature on the shell and ensuring the safety of the gasification furnace;
2. the top-spraying single-burner gasification furnace is adopted, the sealing surface of the furnace mouth is small, the middle partition plate is sealed by the sealing ring, the sealing gap is small, the usage amount of single-furnace annular gas can be obviously reduced, and the top-spraying single-burner gasification furnace has good economic benefit;
3. the annular air quantity is reduced, the effective air quantity of the gasification furnace is relatively increased, and the improvement of the load of the gasification furnace and the stable operation of a lower working section purification device are facilitated;
4. the utility model discloses a structure in big annular space, people can get into the annular space operation, have improved the work efficiency of overhaul of the equipments greatly, reduce cost of labor and maintenance cost.
Therefore, the utility model has the characteristics of reasonable in design, simple structure, easy processing, convenient control, a thing is multi-purpose etc, therefore, has fine popularization and use value.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of the annular cavity structure of the pressurized gasifier according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate directions
The positional or positional relationship is based on that shown in the drawings and is for convenience of description and simplicity of illustration only
Rather than indicating or implying that the device or element so referred to must have a particular orientation, be constructed and arranged in a particular orientation
Operation, and therefore should not be construed as limiting the invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A ring cavity structure of a pressurized gasifier comprises a shell 2, a furnace mouth and a slag mouth, wherein an annular gap gas inlet Na and an annular gap gas inlet b are arranged at the upper part of the shell 2, a first thermocouple connector T1a and an annular gap gas inlet b are arranged at the upper part of the shell 2, a second thermocouple connector T1c and an annular gap gas inlet d and a third thermocouple connector T2a are arranged at the middle lower part of the shell 2, a water-cooled wall structure is arranged in the shell 2 and comprises an upper water-cooled wall 1, a water-cooled wall 3 and a lower water-cooled wall 5 which are arranged from top to bottom, a ring cavity is formed by the outer wall of the water-cooled wall 3 and the inner wall of the shell, sealing structures are arranged between the upper water-cooled wall 1 and the shell 2 and between the lower water.
In this embodiment, the upper part of the water wall 3 is suspended on the upper part of the housing 2 through the water wall outlet header tank 9, the water wall 3 has a water wall water inlet N3a, b, c and a water wall water outlet N4a, b, c, the water wall water outlet N4a, b, c is connected with the water wall outlet header tank 9, the water wall water inlet N3a, b, c is connected with the water wall inlet header tank 4, and the water wall inlet header tank 4 is located below the water wall 3, and the water wall inlet header tank 4 has a water wall inlet header tank drain outlet N2.
In this embodiment, the upper water-cooled wall 1 is disposed at the furnace mouth, the upper water-cooled wall 1 is provided with an upper cold water wall inlet/outlet N5a, b, the upper water-cooled wall 1 and the water-cooled wall outlet header 9 are in butt sealing, and an annular gap between the water-cooled wall outlet header 9 and the upper water-cooled wall 1 is filled with a refractory material.
In this embodiment, the lower water-cooling wall 5 is disposed at the slag hole through the intermediate partition 6, and the lower water-cooling wall 5 has a lower water-cooling wall inlet/outlet N1a, b. The cold water wall inlet and outlet N1a, b is connected with the lower water-cooling wall 5 through the middle clapboard cylinder section 7, and the middle clapboard cylinder section 7 is arranged on the middle clapboard 6. And an annular gap between the water wall inlet header shell section 8 of the water wall inlet header 4 and the intermediate partition plate shell section 7 is filled with refractory materials.
In this embodiment, the diameter of the outer wall of the water wall is smaller than that of the inner wall of the shell 2, and a manhole M is arranged on the side wall of the shell 2.
The specific working process is as follows:
1. an annular gas flow: the annular space protection gas enters the annular cavity space of the gasification furnace through the annular space gas inlets Na and b at the upper part of the gasification furnace, and the annular space gas takes away the radiant heat of part of the water cooling wall 3 downwards along the water cooling wall 3 and enters the downcomer of the gasification furnace from the sealing structure formed by the water cooling wall lower header shell ring 8 and the middle partition plate shell ring 7.
2. And (3) sealing clearance control: the distance between the lower header shell ring 8 of the water wall and the intermediate baffle 6 is larger than the downward expansion amount of the water wall; the diameter of the water wall lower header shell section 8 is smaller than that of the intermediate diaphragm shell section 7, but the final safety clearance after thermal expansion needs to be considered, and the clearance allowance is controlled.
The annular cavity pressure control loop comprises an annular cavity pressure and combustion chamber pressure difference detection assembly, an annular gap gas flow regulating valve and an annular gap gas flowmeter, wherein the annular cavity pressure and combustion chamber pressure difference detection assembly comprises a pressure taking valve I e1 arranged on a fire detection nitrogen purging pipeline, a pressure taking valve II f1 arranged on an annular gap pressure taking pipeline f, a diaphragm differential pressure transmitter connected with the pressure taking valve I and the pressure taking valve II, an annular gap gas flow regulating valve a arranged on an annular gap gas inlet pipeline, an annular gap gas flow b and a check valve c, and the annular gap gas enters a pipeline to be connected with an annular gap gas inlet.
In the embodiment, a flame detector d is provided at the furnace mouth in use in consideration of safety.
The specific working process of annular cavity pressure control is as follows:
1. taking the value of the pressure difference: the fire detection nitrogen purging pipeline e is connected with three groups of pressure taking valves I e1, the annular gap pressure taking pipeline f is connected with three groups of pressure taking valves II f1, the three groups of pressure difference values are respectively connected with three diaphragm differential pressure transmitters, the three groups of pressure difference values are all provided with high-low alarms, and the three-medium pressure difference signals are transmitted to a flow controller of the orifice plate flowmeter 2;
2. and (3) differential pressure control: the pressure difference between the combustion chamber and the annular cavity is used as an input value of the flow controller, and the flow of the annular gas entering the gasification furnace is controlled through the annular gas flow regulating valve 1, so that the purpose of automatically controlling the pressure difference between the combustion chamber and the annular cavity is achieved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a pressure gasification stove's ring cavity structure, includes casing (2), fire door and cinder notch, casing (2) upper portion has annular space gas inlet (Na, b), its characterized in that: the water cooling wall structure is arranged in the shell (2), the water cooling wall structure comprises an upper water cooling wall (1), a water cooling wall (3) and a lower water cooling wall (5) which are arranged from top to bottom, an annular cavity is formed between the outer wall of the water cooling wall (3) and the inner wall of the shell, and sealing structures are arranged between the upper water cooling wall (1) and the shell (2) and between the lower water cooling wall (5) and the shell (2).
2. The ring cavity structure of the pressurized gasification furnace according to claim 1, wherein: the upper water-cooled wall (1) is arranged at a furnace mouth, the upper water-cooled wall (1) is provided with an upper cold water wall inlet and outlet (N5 a, b), and the upper water-cooled wall (1) and the water-cooled wall outlet header (9) are in butt joint sealing.
3. The ring cavity structure of the pressurized gasification furnace according to claim 2, wherein: and a refractory material is filled in an annular gap between the water wall outlet header (9) and the upper water wall (1).
4. The ring cavity structure of the pressurized gasification furnace according to claim 1, wherein: the lower water-cooling wall (5) is arranged at the slag hole through the middle partition plate (6), and the lower water-cooling wall (5) is provided with a lower water-cooling wall inlet and outlet (N1 a, b).
5. The ring cavity structure of the pressurized gasification furnace according to claim 4, wherein: the lower cold water wall inlet and outlet (N1 a, b) is connected with the lower cold water wall (5) through a middle partition plate cylinder section (7), and the middle partition plate cylinder section (7) is arranged on a middle partition plate (6).
6. The ring cavity structure of the pressurized gasification furnace according to claim 5, wherein: the upper part of the water cooled wall (3) is suspended on the upper part of the shell (2) through a water cooled wall outlet header (9), the water cooled wall (3) is provided with a water cooled wall water inlet (N3 a, b, c) and a water cooled wall water outlet (N4 a, b, c), the water cooled wall water inlet (N3 a, b, c) is connected with the water cooled wall inlet header (4), the water cooled wall inlet header (4) is positioned below the water cooled wall (3), and the water cooled wall inlet header (4) is provided with a water cooled wall inlet header drain outlet (N2).
7. The ring cavity structure of the pressurized gasification furnace according to claim 6, wherein: and an annular gap between a water wall inlet header shell section (8) of the water wall inlet header (4) and the intermediate partition plate shell section (7) is filled with refractory materials.
8. The ring cavity structure of the pressurized gasification furnace according to claim 1, wherein: the diameter of the outer wall of the water-cooled wall is smaller than that of the inner wall of the shell (2), and a manhole (M) is arranged on the side wall of the shell (2).
9. The utility model provides a ring chamber pressure control return circuit of ring chamber structure of pressurized gasification stove which characterized in that: the pressure control loop of the pressurized gasifier comprises a loop cavity pressure and combustion chamber pressure difference detection assembly, a loop gap gas flow regulating valve and a loop gap gas flow meter, wherein the loop cavity pressure and combustion chamber pressure difference detection assembly comprises a pressure taking valve I arranged on a fire detection nitrogen purging pipeline (e), a pressure taking valve II arranged on a loop gap pressure taking pipeline (f), a diaphragm differential pressure transmitter connected with the pressure taking valve I and the pressure taking valve II, a loop gap gas flow regulating valve arranged on a loop gap gas inlet pipeline and a loop gap gas flow, and the loop gap gas inlet pipeline is connected with a loop gap gas inlet (Na, b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020775143.0U CN212293455U (en) | 2020-05-12 | 2020-05-12 | Annular cavity structure of pressurized gasification furnace and annular cavity pressure control loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020775143.0U CN212293455U (en) | 2020-05-12 | 2020-05-12 | Annular cavity structure of pressurized gasification furnace and annular cavity pressure control loop |
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| CN212293455U true CN212293455U (en) | 2021-01-05 |
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| CN202020775143.0U Active CN212293455U (en) | 2020-05-12 | 2020-05-12 | Annular cavity structure of pressurized gasification furnace and annular cavity pressure control loop |
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