CN111503294A - Coal ash loading and unloading valve of external gasification furnace - Google Patents

Coal ash loading and unloading valve of external gasification furnace Download PDF

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Publication number
CN111503294A
CN111503294A CN202010278714.4A CN202010278714A CN111503294A CN 111503294 A CN111503294 A CN 111503294A CN 202010278714 A CN202010278714 A CN 202010278714A CN 111503294 A CN111503294 A CN 111503294A
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CN
China
Prior art keywords
valve
plate
valve plate
cover
valve body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010278714.4A
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Chinese (zh)
Inventor
张维田
孙健
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Inner Mongolia Huaxing New Energy Co ltd
Original Assignee
Inner Mongolia Huaxing New Energy Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inner Mongolia Huaxing New Energy Co ltd filed Critical Inner Mongolia Huaxing New Energy Co ltd
Priority to CN202010278714.4A priority Critical patent/CN111503294A/en
Publication of CN111503294A publication Critical patent/CN111503294A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/0227—Packings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/16—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together
    • F16K3/18—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Sliding Valves (AREA)

Abstract

The invention relates to a coal material furnace ash loading and unloading valve of an external gasification furnace, which comprises a valve body, wherein a furnace charge channel is arranged in the middle of the valve body, a furnace charge inlet and a furnace charge outlet are symmetrically arranged at two ends of the furnace charge channel, a valve cover is arranged at the upper part of the valve body, and a shield is arranged at the top of the valve cover; a valve seat is arranged in the valve body, and a valve plate is arranged in the valve seat; the upper part of the valve plate is provided with a material passing hole, the lower part of the valve plate is provided with a sealing plate, the top end of the valve plate is connected with a valve rod, and the valve rod extends through the valve cover and the shield to be connected with a transmission device; a sealing device is arranged between the valve plate and the valve seat; a valve plate seal box is arranged in the valve cover and is installed on the valve body, and a self-compensation lining mechanism is arranged in the valve plate seal box. The coal material furnace ash loading and unloading valve has a high sealing effect, and a maintainer can detach the valve cover on line, so that the valve plate and the valve plate sealing box are replaced on line, and the maintenance is very convenient.

Description

Coal ash loading and unloading valve of external gasification furnace
Technical Field
The invention relates to the technical field of coal gasification furnaces, in particular to a coal ash loading and unloading valve of an external gasification furnace.
Background
At present, the environment-friendly pressurized entrained-flow gasification technology is generally applied in China. The cooling water jacket type gasification furnaces account for a considerable portion of them. Chinese patent 201810091997.4 discloses a central oxygen supply water-cooled wall type fixed bed gasification furnace, which comprises: the device comprises a water-cooled wall shell, a gas-liquid separator, a grate system, a coal lock, an ash lock and a grading oxygen supply device. The top and the bottom of the water-cooled wall shell are respectively provided with an upper port and a lower port; the gas-liquid separator is communicated with the water-cooled wall shell through a pipeline; the grate system comprises a grate and a transmission device; the coal lock is arranged at the upper port of the water-cooled wall shell; the ash lock is arranged at the lower port of the water-cooled wall shell; the grading oxygen supply device comprises a gasification agent pipeline and a central oxygen delivery pipe. The coal lock in the patent is arranged at the upper port of the water wall shell; the ash lock is installed in the lower port of water-cooled wall shell, and coal lock and ash lock installation and maintenance are more difficult, open and close the operation comparatively loaded down with trivial details to sealing performance is not good, reveals easily. When the coal lock and the ash lock are overhauled each time, overhaul personnel are required to enter the closed material tank, and the overhaul work has great potential safety hazard because the inside of the material tank is at high temperature and is full of coal gas in the working state. Therefore, it is necessary to provide an external coal ash loading and unloading valve for the gasification furnace.
Disclosure of Invention
The invention aims to provide a coal ash loading and unloading valve of an external gasification furnace, which comprises a valve body, wherein a furnace charge channel is arranged in the middle of the valve body, a furnace charge inlet and a furnace charge outlet are symmetrically arranged at two ends of the furnace charge channel, a valve cover is arranged at the upper part of the valve body, and a shield is arranged at the top of the valve cover; a valve seat is arranged in the valve body, and a valve plate is arranged in the valve seat; the upper part of the valve plate is provided with a material passing hole, the lower part of the valve plate is provided with a sealing plate, and the top end of the valve plate is connected with a valve rod. The valve plate and the sealing device can be replaced on line only by disassembling the valve cover, and the maintenance is convenient. The self-compensating lining mechanism has excellent sealing effect.
The purpose of the invention is realized by the following technical scheme: a coal material furnace ash loading and unloading valve of an external gasification furnace is provided with a valve body, wherein a furnace charge channel is arranged in the middle of the valve body, a furnace charge inlet and a furnace charge outlet are symmetrically arranged at two ends of the furnace charge channel, a valve cover is arranged at the upper part of the valve body, and a shield is arranged at the top of the valve cover; a valve seat is arranged in the valve body, and a valve plate is arranged in the valve seat; the upper part of the valve plate is provided with a material passing hole, the lower part of the valve plate is provided with a sealing plate, the top end of the valve plate is connected with a valve rod, and the valve rod extends through the valve cover and the shield to be connected with a transmission device; a sealing device is arranged between the valve plate and the valve seat; a valve plate seal box is arranged in the valve cover and is installed on the valve body, and a self-compensation lining mechanism is arranged in the valve plate seal box.
In order to improve the stability of the valve plate, the lower part of the valve body is provided with a valve plate protection box, and the bottom of the valve plate protection box is provided with a valve plate auxiliary supporting mechanism.
In order to improve the sealing performance of the valve plate, the self-compensation lining mechanism comprises a lining plate, a compression spring and an adjusting screw, the lining plate is installed on the inner wall of the valve plate seal box, a plurality of adjusting holes are formed in the wall plate of the valve plate seal box, and the compression spring and the adjusting screw are installed in the adjusting holes.
In order to improve the self-cleaning performance of the valve plate, the bottom end of the inner lining plate is provided with an acute angle.
Compared with the prior art, the invention has the following advantages:
1. because the valve plate sealing box is externally arranged, a maintainer can disassemble the valve cover on line, and the valve plate sealing box are replaced on line, so that the maintenance is very convenient.
2. The sealing device is arranged between the valve plate and the valve seat, so that the sealing effect of the loading and unloading valve is greatly improved.
3. The self-compensating lining mechanism is arranged in the valve plate sealing box, so that the sealing effect of the valve plate sealing box can be kept unchanged in the long-term operation process.
4. The valve plate is coated with the nickel-based alloy and the tungsten carbide protective layer, so that the wear resistance of the valve plate is realized.
5. The bottom end of the lining plate is provided with an acute angle, so that the surface of the valve plate can be randomly cleaned, and the sealing effect of the loading and unloading valve is improved.
Drawings
The invention is further explained with reference to the drawings and the embodiments.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the outline structure of the present invention;
FIG. 3 is a schematic view of the valve plate structure of the present invention;
fig. 4 is a schematic structural view of the valve plate seal box in the invention.
Detailed Description
The first embodiment is as follows:
referring to the attached drawings 1 and 2 (fig. 2 is a right side view of fig. 1), the coal ash loading and unloading valve of the external gasification furnace of the invention comprises a valve body 1, a charging material channel is arranged in the middle of the valve body, a charging material inlet 2 and a charging material outlet 3 are symmetrically arranged at two ends of the charging material channel, and a channel for communicating the charging material inlet and the charging material outlet is the charging material channel; the upper part of the valve body is provided with a valve cover 4, the top of the valve cover is provided with a shield 5, and the shield is used for protecting the valve rod and necessary connecting rod pieces; a valve seat 9 is arranged in the valve body, and a valve plate 10 is arranged in the valve seat; the upper part of the valve plate is provided with a material passing hole 101, the lower part of the valve plate is provided with a sealing plate 102, the top end of the valve plate is connected with a valve rod 7, the valve rod extends upwards to penetrate through the valve cover, and the shield is connected with a transmission device 6; a sealing device 8 is arranged between the valve plate and the valve seat; a valve plate seal box 11 is arranged in the valve cover and is installed on the valve body, and a self-compensation lining mechanism 12 is arranged in the valve plate seal box.
In this embodiment, the coal ash loading and unloading valve of the external gasification furnace may be installed on the upper portion of the gasification furnace to replace the coal lock in the prior art, or may be installed on the bottom portion of the gasification furnace to replace the ash lock in the prior art. And in the process of feeding or discharging raw material coal, furnace ash and other materials in the coal gasifier, the loading and unloading valve plays a role in communication or stopping.
Referring to fig. 3, in the present embodiment, the valve plate 10 has a rectangular upper portion, a semicircular lower portion, and an upper portion connected to the valve stem by a screw. The upper part of the valve plate is provided with a material passing hole 101, the lower part of the valve plate is provided with a sealing plate 102, the diameter of the material passing hole is the same as that of a furnace charge channel in the middle of the valve body, namely the diameters of the material passing hole, the inner diameter of the valve seat and the furnace charge channel are the same, so that furnace charges can pass through without obstacles. The valve body is a cast part, the upper part of the valve body is provided with the valve cover through a plurality of bolts, the valve cover is convenient to disassemble, and the top of the valve cover is provided with the protective cover through the bolts; after the valve cover is removed, the valve plate, the valve seat and the sealing device 8 can be taken out from the valve body. The transmission device can be connected with a hand wheel, and also can be connected with an electric driver or a hydraulic driver for driving the valve plate to lift. In this embodiment, the actuator is a hydraulic actuator having a hydraulic piston ram directly connected to the valve stem. If the transmission device adopts a hand wheel, a connecting rod piece is required to be connected with the valve rod.
In the embodiment, the valve seat is designed into two parts which are positioned at two sides of the valve plate and are respectively arranged in the valve body, so that the valve seat can be conveniently detached, the inner diameter of the valve seat is the same as the diameter of the material passing hole on the valve plate, and the valve seat is rectangular in appearance; the part of the valve seat, which is contacted with the valve body, is provided with a sealing filler (the sealing filler belongs to the prior art and is not described); the valve seat can bear the pressure of the valve plate and can play a role in sealing in combination with the valve plate. In order to enhance the tightness in the moving state of the valve plate, a sealing device 8 is provided between the valve plate and the valve seat, the sealing device comprising a wear-resistant seal and a compression spring, the wear-resistant seal being held in close contact with the valve plate by virtue of the pressing force of the compression spring. The sealing device is provided with two parts, namely a valve plate and a valve cover.
Referring to fig. 4, in the embodiment, a valve plate seal box is arranged in the valve cover, the valve plate seal box is mounted on the valve body through a plurality of bolts, and a self-compensation lining mechanism is arranged in the valve plate seal box. The purpose of the valve plate seal box is to prevent dust particles from leaking out along the valve stem, damaging the valve stem and the transmission. The self-compensating lining mechanism 12 comprises a lining plate 121, a compression spring and an adjusting screw 122, wherein the lining plate is installed on the inner wall of the valve plate seal box, a plurality of adjusting holes are formed in the wall plate of the valve plate seal box, the compression spring and the adjusting screw are installed in the adjusting holes, in the embodiment, the adjusting holes are threaded holes, and the adjusting screw is installed in the adjusting holes through threads. The valve plate sealing box is a rectangular box body, two side wall plates of the box body are respectively provided with an inner lining plate 121, adjusting screws are arranged on the side wall plates of the box body, a compression spring is arranged between the adjusting screws and the inner lining plates, the pressing force can be adjusted by rotating the adjusting screws, the inner lining plates 121 and the valve plates 10 are kept in close friction contact, and gaps formed by abrasion of the inner lining plates are automatically compensated.
In this embodiment, when the coal ash loading and unloading valve is opened or closed, the furnace charge (raw coal or ash) will impact the valve plate. In order to prevent the impact force from influencing the normal operation of the valve plate, a valve plate protecting box 13 is arranged at the lower part of the valve body, and a valve plate auxiliary supporting mechanism 14 is arranged at the bottom of the valve plate protecting box. The valve plate protection box is a sealed box body and prevents dust particles from leaking to the outside during the movement of the valve plate. The auxiliary support is a positioning screw 14, and a positioning pit is arranged at the bottom of the valve plate. When the valve plate moves to the full-open position, the end of the positioning screw is locked in the positioning concave pit. The disclosure of the present embodiment also pertains to the disclosure of the present invention.
Example two:
the present embodiment is an improvement on the basis of the first embodiment, and the same contents as those in the first embodiment are understood by referring to the contents disclosed in the first embodiment, and are not repeatedly described herein; the disclosure in the first embodiment should also be regarded as the disclosure in the present embodiment.
Referring to fig. 3, in this embodiment, in order to improve the wear resistance of the valve plate, a nickel-based alloy protective layer or a tungsten carbide protective layer is disposed on the working surface of the valve plate, and an acute angle is disposed at the bottom end of the lining plate in the valve plate seal box. The protective layer may be applied by spray coating techniques, or may be otherwise formed. The bottom end of the lining plate is provided with an acute angle so as to improve the self-cleaning performance of the valve plate. The acute angle means that the included angle between the end face of the bottom end of the lining plate and the plate surface of the valve plate is less than 90 degrees.

Claims (4)

1. The utility model provides a coal charge ashes loading and unloading valve of external gasifier, has a valve body (1), its characterized in that: a furnace charge channel is arranged in the middle of the valve body, a furnace charge inlet (2) and a furnace charge outlet (3) are symmetrically arranged at two ends of the furnace charge channel, a valve cover (4) is arranged at the upper part of the valve body, and a shield (5) is arranged at the top of the valve cover; a valve seat (9) is arranged in the valve body, and a valve plate (10) is arranged in the valve seat; the upper part of the valve plate is provided with a material passing hole (101), the lower part of the valve plate is provided with a sealing plate (102), the top end of the valve plate is connected with a valve rod (7) which extends through the valve cover and the shield is connected with a transmission device (6); a sealing device (8) is arranged between the valve plate and the valve seat; a valve plate seal box (11) is arranged in the valve cover and is installed on the valve body, and a self-compensation lining mechanism (12) is arranged in the valve plate seal box.
2. A coal ash handling valve as set forth in claim 1, characterized in that: the valve plate protection box is arranged at the lower part of the valve body, and the valve plate auxiliary supporting mechanism is arranged at the bottom of the valve plate protection box.
3. The coal ash handling valve of claim 2, wherein: the self-compensation lining mechanism comprises a lining plate, a compression spring and adjusting screws, wherein the lining plate is installed on the inner wall of the valve plate seal box, a plurality of adjusting holes are formed in the wall plate of the valve plate seal box, and the compression spring and the adjusting screws are installed in the adjusting holes.
4. A coal ash handling valve as set forth in claim 3, characterized in that: the bottom end of the lining plate is provided with an acute angle.
CN202010278714.4A 2020-04-10 2020-04-10 Coal ash loading and unloading valve of external gasification furnace Pending CN111503294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010278714.4A CN111503294A (en) 2020-04-10 2020-04-10 Coal ash loading and unloading valve of external gasification furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010278714.4A CN111503294A (en) 2020-04-10 2020-04-10 Coal ash loading and unloading valve of external gasification furnace

Publications (1)

Publication Number Publication Date
CN111503294A true CN111503294A (en) 2020-08-07

Family

ID=71872736

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010278714.4A Pending CN111503294A (en) 2020-04-10 2020-04-10 Coal ash loading and unloading valve of external gasification furnace

Country Status (1)

Country Link
CN (1) CN111503294A (en)

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