WO2011043463A1 - 仕切弁 - Google Patents

仕切弁 Download PDF

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Publication number
WO2011043463A1
WO2011043463A1 PCT/JP2010/067750 JP2010067750W WO2011043463A1 WO 2011043463 A1 WO2011043463 A1 WO 2011043463A1 JP 2010067750 W JP2010067750 W JP 2010067750W WO 2011043463 A1 WO2011043463 A1 WO 2011043463A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
gas
valve body
sealing material
fluidized bed
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.)
Ceased
Application number
PCT/JP2010/067750
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
信明 伊藤
鈴木　公仁
藤本　健一郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to BR112012007797-0A priority Critical patent/BR112012007797B1/pt
Priority to IN2797DEN2012 priority patent/IN2012DN02797A/en
Priority to CN201080044735.4A priority patent/CN102686922B/zh
Priority to KR1020127008824A priority patent/KR101419143B1/ko
Publication of WO2011043463A1 publication Critical patent/WO2011043463A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • 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
    • F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
    • F16K13/08—Arrangements for cutting-off not used
    • F16K13/10—Arrangements for cutting-off not used by means of liquid or granular medium
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B27/00—Arrangements for withdrawal of the distillation gases
    • C10B27/06—Conduit details, e.g. valves
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • 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
    • F16K25/00—Details relating to contact between valve members and seats
    • F16K25/005—Particular materials for seats or closure elements
    • 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
    • F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube

Definitions

  • the present invention relates to a gate valve used in an apparatus such as a coke oven using various gases (particularly high-temperature gas).
  • coal carbonization gas (Coke Oven Gas, hereinafter referred to as COG) generated during the carbonization of coal is recovered by a collecting pipe and used as fuel.
  • COG coal carbonization gas
  • the generated COG is a high temperature of about 850 ° C. or about 900 ° C. Therefore, in principle, it is possible to recover the sensible heat of the gas to save energy.
  • COG contains tar, which is a high boiling point gas, and has a property of condensing tar in COG when the temperature of COG falls below 700 ° C. Once condensed, the tar changes in nature after condensation and often changes to a substance that does not readily evaporate when heated again.
  • COG also has the property that carbon containing hydrocarbons such as methane is decomposed at a high temperature of 700 ° C. or more and precipitated as solid carbon (soot) (this phenomenon is called coking). Since the solid carbons once precipitated are also firmly bonded to each other, they are not easily converted into hydrocarbons even if the temperature is lowered again.
  • wet COG gas from which tar has not been removed
  • the temperature of COG may be lowered in a series of coal distillation processes, and at this time, the condensate of tar contained in COG may adhere to the inner wall surface of the rising pipe, and a firm fixed layer may be formed. is there. If the operation is continued in a state where these deposits are formed, the pipe of the ascending pipe is closed. For this reason, the pipe line of the riser pipe requires a work of burning off carbon adhering to the inner face of the riser pipe every certain short period, for example, every day.
  • problems of tar adhesion and coking that occur in the riser pipe are not limited to the riser pipe, but are common problems in the pipeline system for circulating the wet COG.
  • Patent Document 2 discloses a shut-off valve for wet COG, but in this shut-off valve, both the valve seat and the valve body are kept in contact with the wet COG, and intense coking and tar condensing solidified on these surfaces. Inevitable, frequent cleaning work is required.
  • an exhaust pipe is provided in an ascending pipe, and exhaust air is recovered by heating air circulating in the air pipe by a high-temperature COG flow in the ascending pipe.
  • COG immediately condenses on the surface of the air piping as tar and solidifies to adhere to the surface of the air piping.
  • heat transfer is hindered and the riser tube is blocked.
  • the ascending pipe top lid and the dry main lid Since it is necessary to open and close the pipe also in the ascending pipe, normally, two valves, the ascending pipe top lid and the dry main lid, are provided.
  • the riser top lid is burned while releasing the residual gas in the coke oven to the atmosphere after the end of carbonization, and the gap between the riser top lid and the riser is water sealed when coal is being carbonized. .
  • a structure in which a gap is provided between the riser and the lid in advance and the COG is not completely sealed is once used.
  • the dry main lid is a pipe lid connecting the ascending pipe and the dry main, which is also sealed with water when the pipe is closed.
  • a valve structure that can contact the wet COG in the prior art a structure that is maintained at a low temperature or does not completely seal has been used.
  • a valve that can control the flow of the wet COG in a high temperature state in the COG pipe line system and open and close the pipe line is indispensable.
  • conventional valves (lids) cannot completely seal the wet COG, cause the wet COG to cool, or frequently terminate the operation (coal dry distillation) and adhere to the inner surface of the valve. This causes problems such as the need to be removed.
  • the present invention has been made in view of the above-described problems, and gas, particularly wet COG from room temperature to about 850 ° C. or about 900 ° C. can be circulated for a long time between the flow path pipes.
  • the purpose is to provide a possible gate valve.
  • a gate valve includes a granular sealing material that can flow in a temperature range from room temperature to 900 ° C .; a valve box in which the sealing material is stored at the bottom; A first flow path pipe connected to the valve box and flowing gas from the outside to the inside of the valve box; a second flow path pipe connected to the valve box and flowing gas from the valve box to the outside A flow path pipe; at least partly buried in the sealing material, lowered to a valve body lowering position that inhibits a gas flow from the first flow path pipe to the second flow path pipe, and the sealing A valve body that is disposed above the surface of the stopper and that rises from the first flow path pipe to the second flow path pipe where the gas flows into the valve body ascending position; A valve body elevating device that elevates and lowers between a position and the valve body ascending position.
  • the gate valve according to (1) further includes a fluidized bed gas supply switching mechanism having a fluidized bed gas pipe for supplying a fluidized bed gas for flowing the sealing material from the outside to the inside of the valve box.
  • the fluidized bed gas supply switching mechanism is configured such that the fluidized bed gas is supplied to the valve box through the fluidized bed gas pipe during a movement period in which the valve body moves between the valve body lowered position and the valve body raised position. The flow of the fluidized bed gas is switched so that the fluidized bed gas is not supplied into the valve box during a period other than the moving period.
  • a gate valve includes a valve box including at least a fluidized bed that enables flow of a granular sealing material with little change in physical properties in a high temperature range from room temperature to 900 ° C;
  • a hot gas outlet pipe connected to the valve box above the surface of the fluidized bed; and connected to the valve box so that an opening is disposed above the surface of the fluidized bed at least when the valve is open.
  • the sealed high-temperature gas inflow pipe; and in the closed state of the gate valve, the sealing material is used to inhibit the flow of the high-temperature gas between the high-temperature gas inflow pipe and the high-temperature gas outflow pipe.
  • valve body At the position where the valve body descends, which is a position where at least a part of the valve body is buried in the stopper, and in the open state of the gate valve, all the valve body exists above the surface of the sealing material.
  • a valve element disposed at a certain valve element ascent position; a valve element elevating device that changes the arrangement of the valve element between the valve element descending position and the valve element ascending position; mixed in the sealing material
  • a fluidized bed gas for burning carbide is supplied to the valve box.
  • the space inside the valve box includes the inside of the valve body. It is preferable to separate the first space from the other second space.
  • the sealing material pushed out by the valve body is around the valve box. Is preferably divided into a first space including the inside of the first flow path pipe and a second space including the inside of the second flow path pipe.
  • a pad to suppress scattering of the sealing material is loaded on the upper surface of the sealing material.
  • the fluidized bed gas is an oxidizing gas containing oxygen.
  • the sealing material is one or two selected from alumina, magnesia, zircon, stabilized zirconia, titanium oxide, silicon nitride, and silicon carbide. It is preferable to consist of the above.
  • the granular sealing material which can flow in the temperature range from normal temperature to the high temperature of about 850 degreeC or about 900 degreeC is stored by the bottom part of the valve box.
  • the valve body rises to the valve body ascending position, and gas flows between the first flow path pipe and the second flow path pipe.
  • the valve body is lowered to the valve body lowering position, and the gas flow between the first flow path pipe and the second flow path pipe is inhibited. At this time, even if tar or solid carbon is generated in the encapsulant, the encapsulant can flow.
  • a conventional sealing method for example, a water seal valve
  • water cannot be maintained as a liquid phase at a high temperature due to a phase change, so that the water seal valve cannot be applied.
  • solid particles in the temperature range from room temperature to 850 ° C., for example, when particles of a material that undergoes phase transformation are used, due to sudden change in density that is unavoidable when phase change occurs. Grain is gradually broken up. As a result, there is a problem that the particle size distribution of the particles cannot be maintained at an optimum constant value, so that the particles of the material that undergoes phase transformation are not suitable as the sealing material.
  • a conventional gate valve has a structure in which a working fluid is sealed by tightening a valve body to a valve seat.
  • the sealing is performed by burying the valve body in a layer of a highly mobile sealing material (for example, a depth of 30 mm or more and 1 m or less). The above problem can be avoided.
  • the sealing material since the wet COG comes into contact with the sealing material, coking and tar are condensed and solidified on the sealing material. However, since a relatively large amount of granular sealing material is used, caulking and tar do not condense and solidify, and therefore it is difficult to adversely affect the sealing performance. That is, in the gate valve of one embodiment of the present invention, since the sealing material is fluidized and stirred, even when caulking occurs in a part of the sealing material on the surface layer, the precipitated carbon is quickly dispersed throughout the layer. The Thereby, the influence of the sealing performance and fluidity deterioration of the sealing material can be reduced. In the gate valve of one embodiment of the present invention, since the sealing material can effectively polish the valve body by frequently burying the valve body in the sealing material, deposits on the surface of the valve body are removed. effective.
  • the valve body lifting device lowers the valve body, and at least a part of the valve body is buried in the sealing material, and the first flow path pipe and the second flow path pipe Block the flow of gas to and from. Further, the valve body lifting device raises the valve body, and gas flows between the first flow path pipe and the second flow path pipe.
  • the valve body lifting / lowering device the valve body can be lifted and lowered easily and reliably between the valve body lowered position and the valve body raised position.
  • the fluidized bed gas is supplied into the valve box through the fluidized bed gas pipe by the fluidized gas supply switching mechanism according to the movement of the valve element.
  • the sealing material can be efficiently converted into a fluidized bed by supplying the fluidized bed gas into the valve box.
  • the valve body when the valve body is lowered to the valve body lowered position, the valve body causes the first space including the inside of the valve body and the first space including the inside of the valve body. Since the two spaces are separated, the gas flow between the first flow path pipe and the second flow path pipe is hindered. Thereby, it can suppress that a valve body etc.
  • gas for example, gas components, such as wet COG
  • gas components for example, gas components, such as wet COG
  • the gate valve described in (5) above when the valve body is lowered to the valve body lowering position, the space around the valve box is reduced by the sealing material pushed out by the valve body. Since the first space including the interior and the second space including the interior of the second flow path pipe are separated, the gas flow between the first flow path pipe and the second flow path pipe is hindered. Thereby, it can suppress that a valve body etc. are polluted and corroded by gas (for example, gas components, such as wet COG).
  • gas for example, gas components, such as wet COG
  • FIG. 1 shows an open state of the gate valve 100
  • FIG. 2 shows a closed state of the gate valve 100
  • the arrow F shown in FIG. 1 shows the direction through which working gas (for example, gas components, such as wet COG) flows.
  • a gate valve 100 described in the present embodiment is a high-temperature furnace gas gate valve used in a high-temperature furnace.
  • the high-temperature furnace gas gate valve 100 includes a granular sealing material 5 that can flow in a temperature range from room temperature to a high temperature of 850 ° C. or about 900 ° C .; a valve box in which the sealing material 5 is stored in the bottom 1A.
  • the hot gas inflow pipe 3 has an opening 3A disposed above the surface 5A of the sealing material 5 at least when the gate valve 100 is open, and connects the inside 1B and the outside 1C of the valve box 1.
  • the hot gas inflow pipe 3 specifically extends from the bottom 1 ⁇ / b> A of the valve box 1 through the sealing material 5 and extends into the inside 1 ⁇ / b> B of the valve box 1.
  • the hot gas outflow pipe 4 is provided on the side surface 1D of the valve box 1 above the surface 5A of the sealing material 5 and connects the inside 1B and the outside 1C of the valve box 1.
  • valve body 2 is disposed above the surface 5A of the sealing material 5 when the gate valve 100 shown in FIG. 1 is opened, and allows the working gas to flow between the inflow pipe 3 and the outflow pipe 4. Ascend to the position of raising the body. Further, the inside 2A of the valve body 2 is hollow, and the inflow pipe 3 is inserted into the inside 2A of the valve body 2 when the gate valve 100 is closed.
  • valve box 1 (Structure of gate valve) As shown in FIG. 1, when the gate valve 100 is open, the hot working gas flows into the valve box 1 from the hot gas inlet pipe 3 and flows out of the hot gas outlet pipe 4. The position of the valve body 2 at this time will be referred to as a valve body raised position. As shown in FIG. 2, when the gate valve 100 is closed, the inner space 1 ⁇ / b> B of the valve box 1 is the first space on the inflow pipe 3 side by the valve body 2 whose lower end 2 ⁇ / b> B is buried in the sealing material 5.
  • the position of the valve body 2 at this time will be referred to as a valve body lowered position.
  • the first space 19 is formed by the inner wall of the valve body 2, the outer wall of the inflow pipe 3, and the surface 5 ⁇ / b> A of the sealing material 5
  • the second space 20 is the inner wall of the valve box 1 and the outer wall of the valve body 2.
  • the surface 5 ⁇ / b> A of the sealing material 5 A small amount of working gas can flow through the gap (inside) of the sealing material 5.
  • the gas resistance of the sealing material 5 is sufficiently large, so that substantial gas sealing can be realized.
  • the working gas flow rate can be 1 mm / second or less.
  • the embedment depth of the valve body 2 in the sealing material 5 can be, for example, 30 mm or more and 1 m or less.
  • the fluidized bed gas supply switching mechanism S supplies the fluidized bed gas supply source 9 and the fluidized bed gas for fluidizing the sealing material 5 to the valve boxes 1, 21, 31. , 21B, 31B and the outside 1C, 21C, 31C are provided with a fluidized bed gas pipe 11 and a fluidized bed gas valve 12.
  • the fluidized bed gas supply switching mechanism S allows the fluidized bed gas to flow through the fluidized bed gas pipe 11 during the movement period in which the valve bodies 2, 22 and 32 move between the valve body lowered position and the valve body raised position.
  • the fluidized bed gas flow is switched so that the fluidized bed gas is not supplied to the interior 1B of the valve box 1 during a period other than the moving period.
  • the fluidized bed gas supply switching mechanism S switches the gas flow rate supplied to the fluidized bed gas supply port 10 provided in the lower part 1F of the valve box 1.
  • the gas flow rate is switched directly by changing the opening degree of the fluidized bed gas valve 12.
  • the fluidized bed gas valve 12 since the fluidized bed gas supply is stopped during a period in which the valve body 2 is not raised and lowered, the fluidized bed gas valve 12 needs to have a function of closing the gas.
  • a gate valve can be used as the fluidized bed gas valve 12.
  • the fluidized bed gas valve 12 can be a flow rate adjusting valve having a shut-off function.
  • valves can be used for these gate valves and flow rate adjusting valves.
  • you may provide a flow meter separately in a pipe line, and may control a valve opening degree based on this output value.
  • the method for adjusting the valve opening may be performed manually, or may be automatically controlled by separately providing a control device and a valve actuator.
  • the fluidized bed gas piping 11 for supplying the fluidized bed gas for flowing the sealing material 5 and the fluidized bed gas for burning the carbide in the sealed material 5 to the valve box 1 may be provided separately.
  • the fluidized bed gas pipe 11 may be shared on the premise that a gas supply switching mechanism such as a three-way valve is provided for each fluidized bed gas species supply source.
  • the lid 18 that contacts the upper end of the hot gas inflow pipe 3 is It may be provided in the inside 2 ⁇ / b> A of the body 2. Since it is inevitable that deposits due to coking or tar condensation and solidification are generated on the surface of the lid 18 or the hot gas inflow pipe 3, it is possible to completely prevent the working gas from flowing out to the outflow pipe 4 with the lid 18 alone. It is generally difficult to shut off. However, when the working gas flows through the gap between the lid 18 and the upper end of the hot gas inflow pipe 3, the working gas flowing in from the inflow pipe 3 comes into contact with the lid 18, resulting in a pressure loss.
  • valve body lifting / lowering device 8 connected to the valve body 2 is operated.
  • a bellows 14 is provided between the valve body 2 and the valve box 1 to maintain the sealed state of the valve box 1. Further, the bellows 14 absorbs the influence of the relative movement amount between the valve body 2 and the valve box 1. That is, the bellows 14 has elasticity, and expands and contracts in the extending direction of the bellows 14 while maintaining the inner state of the bellows 14 in an airtight state. For this reason, even if the valve box 1 and the valve body 2 move relatively, the space inside the valve box 1 is maintained in an airtight state.
  • the sealing material 5 When the valve body 2 is moved from the valve body ascending position to the valve body descending position, if the sealing material 5 is stationary, the propulsion resistance is large, and a large and powerful propulsion device is required. Therefore, in the present embodiment, when the valve body 2 is moved up and down in the sealing material 5, the sealing material 5 stationary in the inside 1 ⁇ / b> B of the valve box 1 is flowed to form a fluidized bed. By raising and lowering the valve body 2 in the sealing material 5 that has become a fluidized bed, the force (drag) against the propulsive force is reduced. Thereafter, the fluidized bed of the sealing material 5 is stopped, and the sealing performance of the sealing material 5 is recovered.
  • valve body 2 can be stably inserted deeply into the sealing material 5 with a relatively small driving force.
  • the fluidized bed gas is caused to flow through the fluidized bed gas pipe 11, and the fluidized bed gas is supplied into the valve box 1 from the fluidized bed gas inlet 10 in the lower part 1 F of the valve box 1.
  • the fluidized bed gas supplied into the valve box 1 is dispersed by the dispersion plate 6 and fluidizes the sealing material 5 by fluid resistance when passing through the layer of the sealing material 5 disposed on the dispersion plate 6.
  • the sealing material 5 in the region R sandwiched between the inner wall 2 and the outer wall of the inflow pipe 3 may not be fluidized.
  • the sealing material 5 that is not fluidized may move upward as the valve body 2 rises, and a part of the sealing material 5 may fall into the opening 3 ⁇ / b> A of the inflow pipe 3. .
  • a flange 17 may be provided on the peripheral edge of the upper end of the inflow pipe 3 toward the outside.
  • the sealing attached to the inside of the valve body 2 before the lower end 2B of the valve body 2 is positioned above the opening 3A of the inflow pipe 3 The material 5 can be forcibly dropped. Therefore, it is possible to prevent the sealing material 5 attached to the inside of the valve body 2 from falling into the inflow pipe 3 from the opening 3A.
  • the pulling drag force when performing such pulling out is much smaller than the propulsive force required to insert the valve body 2 deeply into the stationary sealing material 5. Therefore, it is not necessary to use an extremely strong valve body lifting / lowering device 8 in order to perform such extraction.
  • the gate valve 100 when the gate valve 100 is open, the working gas flows into the valve box 1 from the hot gas inflow pipe 3 and the working gas flows out from the hot gas outflow pipe 4. Contrary to this operation, when the gate valve 100 is open, a hot working gas is allowed to flow into the valve box 1 from the hot gas outflow pipe (first flow pipe) 4 and the hot gas inflow pipe (first A flow path system that allows the working gas to flow out from the two flow path pipes 3 may be adopted. Further, in the present embodiment, the gate valve is opened and closed by using the valve body lifting device 8 to raise and lower the gate valve.
  • valve box 1 expands and contracts (absorbs the relative movement amount).
  • a bellows may be provided separately.
  • a gas capable of burning carbide as a fluidized bed gas is supplied from the fluidized bed gas inlet 10 to the valve box 1 through the fluidized bed gas pipe 11.
  • the fluidized bed gas passes through the sealing material 5 and burns and removes the carbide mixed in the sealing material 5.
  • the generated gas such as carbon dioxide is discharged out of the valve from the outflow pipe 4 together with the fluidized bed gas reaching the upper surface of the sealing material 5.
  • the fluidized bed gas is supplied without moving the valve body 2 in the sealing material 5, it is not necessary to cause the sealing material 5 to flow with the fluidized bed gas.
  • the supply amount of the fluidized bed gas can be set smaller than the flow rate at which the sealing material 5 can flow.
  • carbonized_material mixed in the sealing material 5 can be made into a suitable range by adjusting the supply amount of fluidized bed gas. For example, by setting the fluidized bed gas supply amount to be sufficiently small, it is possible to prevent excessive temperature rise in the valve due to combustion of carbides.
  • FIG. 3 shows an open state of the gate valve 200
  • FIG. 4 shows a closed state of the gate valve 200
  • the arrow F shown in FIG. 3 shows the direction through which working gas flows.
  • a part of the hot gas inflow pipe (first flow pipe) 23 is used as a valve body.
  • the hot gas inflow pipe 23 extends upward from the upper part 21D of the valve box 21 to the inside 21B and the upper part 21D of the valve box 21, and the lower end 23C side of the hot gas inflow pipe 23 is the valve box 21 side.
  • the inner end 21B is inserted, and the upper end 23B side is connected to the outer 21C.
  • the hot working gas flows from the lower end 23 ⁇ / b> C into the interior 21 ⁇ / b> B of the valve box 21 through the upper end 23 ⁇ / b> B of the hot gas inlet pipe 23.
  • valve body raised position When the gate valve 200 is closed, the lower end 23 ⁇ / b> C of the hot gas inflow pipe 23 is buried in the sealing material 5, so that the interior 21 ⁇ / b> B of the valve box 21 has a first space (valve body) on the hot gas inflow pipe 23 side. 22) and a second space 20 (including the inside of the valve box 21) on the high temperature gas outflow pipe 24 side.
  • the position of the valve body (hot gas inflow pipe 23) at this time will be referred to as a valve body lowered position.
  • the hot gas inflow pipe 23 is moved up and down by the valve body elevating device 8 connected to the hot gas inflow pipe 23.
  • the change in the relative position between the valve box 21 and the inflow pipe 23 is absorbed by the bellows 14 to ensure the sealing property of the valve box 21.
  • the amount of the valve body (hot gas inflow pipe 23) embedded in the sealing material 5 and the positional relationship between the hot gas outflow pipe 24 and the fluidized bed of the sealing material 5 are the same as those in the first embodiment.
  • the sealing material 5 in the hot gas inflow pipe 23 may not be fluidized (in particular, high temperature). This is remarkable when a difference in thermal expansion occurs between the gas inflow pipe 23 and the sealing material 5 and the sealing material 5 receives a compressive force). At this time, when the hot gas inflow pipe 23 is raised, the sealing material 5 is raised together with the hot gas inflow pipe 23 without falling. In spite of the fact that the gate valve 200 is open, the sealing material 5 remains in the interior 23D of the hot gas inflow pipe 23, causing a problem of closing the hot gas inflow pipe 23.
  • a sealing material removing device (sealing material removing member) provided in the bottom portion 21A of the valve box 21 and inserted into the inside 23D of the inflow pipe 23 at least when the gate valve 200 is closed. 15 may be provided on the dispersion plate 6.
  • the diameter of the upper end of the sealing material remover 15 is set larger than that below.
  • the sealing material 5 constrained in the hot gas inflow pipe 23 falls due to gravity, and the hot gas inflow pipe 23 can be prevented from being blocked. It is preferable that the upper end of the sealing material remover 15 is disposed above the surface 5A of the sealing material 5 when the sealing material 5 is in a stationary state where the sealing material 5 is not fluidized.
  • the flow direction of the high-temperature working gas may be reversed (a flow path system for flowing the working gas from the high-temperature gas outflow pipe 24 to the high-temperature gas inflow pipe 23). Further, there is no problem even if the valve box 1 is raised and lowered instead of the valve body (hot gas inflow pipe 23).
  • FIG. 5 shows an open state of the gate valve 300
  • FIG. 6 shows a closed state of the gate valve 300
  • an arrow F shown in FIG. 5 indicates the direction in which the working gas flows.
  • This embodiment differs from the first embodiment in the position of the hot gas inflow pipe (first flow path pipe) 33 and the form of the valve body 32. That is, as shown in FIG. 5, the inflow pipe 33 is provided on the side surface 31 ⁇ / b> E of the valve box 31. In addition, as shown in FIG. 6, the valve body 32 is buried in the sealing material 5 by moving the valve body 32 from the upper part 31 ⁇ / b> D of the valve box 31 toward the bottom part 31 ⁇ / b> A. By burying the valve body 32 in the sealing material 5, the position of the surface 5 ⁇ / b> A of the sealing material 5 rises, and the sealing material 5 flows into the inside of the inflow pipe 33 and the inside of the outflow pipe 34.
  • the opening 33A of the inflow pipe 33 and the opening 34A of the outflow pipe 34 are closed.
  • the surface 5A of the sealing material 5 has an opening 33A of the inflow pipe 33 and an opening 34A of the outflow pipe (second flow path pipe) 34. It is located so as not to flow into.
  • the gate valve 300 shown in FIG. 6 is closed, the sealing material 5 removed by the valve body 32 causes the interior 31B of the valve box 31 to be in the first space on the high temperature gas inflow tube 33 side (the high temperature gas inflow tube 33). And a second space (space including the inside of the hot gas outflow pipe 34) 20 including the inside of the hot gas outflow pipe 4.
  • the hot working gas flows into the valve box 31 from the hot gas inflow pipe 33 and flows out from the outflow pipe 34.
  • the position of the valve body 32 at this time will be referred to as a valve body raised position.
  • the gate valve 300 is closed, a part of the sealing material 5 is removed into the high temperature gas inflow pipe 33 and the high temperature gas outflow pipe 34 by the valve body 32 whose lower end 32A is buried in the sealing material 5 ( Extruded) closes the opening 33A of the hot gas inflow pipe 33 and the opening 34A of the hot gas outflow pipe 34.
  • the space around the valve box 31 is separated by the first space 19 on the high temperature gas inflow pipe 33 side and the second space 20 on the high temperature gas outflow pipe 34 side, and from the high temperature gas inflow pipe 33 to the high temperature gas outflow pipe 34.
  • the hot working gas flow is inhibited.
  • the position of the valve body at this time will be referred to as a valve body lowered position.
  • the “space around the valve box 31” is a space communicating with the valve box 31 (including the internal space of the valve box 31 itself) and means a space in which the sealing material 5 can move.
  • the space around the valve box 31 is, for example, a space in the inflow pipe 33 and the outflow pipe 34 in the present embodiment.
  • valve body 32 is lifted and lowered by the valve body lifting / lowering device 8 connected to the valve body 32.
  • the bellows 14 By providing the bellows 14, the relative position change of the valve box 31 and the valve body 32 is absorbed, and the sealing property of the valve box 31 is ensured.
  • the valve element can be operated even when the flow direction of the high-temperature working gas is reversed (the flow path system for flowing the working gas from the high-temperature gas outflow pipe 34 to the high-temperature gas inflow pipe 34). There is no problem even if the valve box 31 is raised and lowered instead of 32.
  • FIG. 7 open state
  • FIG. 8 closed state
  • the pad 121 is composed of an inner ring-shaped pad and an outer ring-shaped pad.
  • the valve body 2 can open and close the valve by passing between the inner and outer pads.
  • the pad 121 is stacked on the sealing material 5.
  • the working gas that has flowed into the valve box 1 from the inflow pipe 3 generates a violent air flow in the valve box 1.
  • this intense air current does not come into direct contact with the sealing material 5 by the pad 121, the amount of the sealing material 5 scattered by the air current in the valve box 1 can be suppressed. .
  • FIG. 9 This embodiment will be described using the apparatus shown in FIG. 9 in which the valve box 1 of the apparatus shown in FIGS. 1 and 2 is arranged in a heating furnace 124.
  • the temperature of the heating furnace 124 is set to normal temperature
  • the fan 122 is connected to the outflow pipe 4 and suction is performed.
  • the normal temperature air as the working gas is sucked from the inflow pipe 3 and introduced into the valve box 1, and then flows out from the outflow pipe 4.
  • a filter 123 is provided at the outlet of the outflow pipe 4 to collect the scattered sealing material 5.
  • the outflow pipe 4 is provided with a flow meter 125 and a pressure gauge 126.
  • suction by the fan 122 is performed with the valve closed, and the leak rate of the valve can be obtained by using the flow rate, the measured pressure value, and the pressure loss coefficient obtained above.
  • the sealing material scattering mass flow rate can be obtained by performing suction by a fan 122 for a certain period of time and taking out the weight of particles collected by the filter 123 during this period and weighing it.
  • an inflow pipe and an outflow pipe having a diameter of 80 mm are connected to a valve box having a diameter of 200 mm and a height of 600 mm, and zircon beads having a diameter of 60 to 120 ⁇ m are laid as a sealing material at a thickness of 80 mm at the bottom of the valve box.
  • the leak rate of the valve can be 0.005% or less of the valve capacity coefficient (Cv value).
  • the sealing material scattering mass flow rate can be set to 70 g / h.
  • the driving force of the valve can be obtained from the air pressure supplied to the air cylinder during the valve closing operation using the air drive as the valve drive device.
  • the propulsive force when supplying air with a pressure of 0.001 MPa as the fluidized bed gas from the fluidized bed gas pipe 11 into the valve box 1 is the minimum required for closing the valve by performing the valve closing operation under different driving force conditions.
  • Propulsive force (required propulsive force for valve closing) can be obtained.
  • the required propulsive force for closing the valve can be 10 N or less.
  • the leak rate of the valve is set to 0.1% or less of the Cv value in the open state.
  • the sealing material scattering mass flow rate can be set to 1 g / h.
  • the diameter of valve box 1,21,31 can be 100 mm or more and 1 m or less, for example.
  • the height of the valve box 1 can be 100 mm or more and 4 m or less, for example.
  • the layer thickness of the sealing material 5 can be 30 mm or more and 1 m or less, for example.
  • the opening diameters of the hot gas inflow pipes 3, 23, 33 and the hot gas outflow pipes 4, 24, 34 in the valve boxes 1, 21, 31 can be, for example, 10 mm or more and 300 mm or less.
  • a punched metal or a metal mesh can be used for the dispersion plate 6.
  • the fluidized bed gas may be supplied using a general grid tube or a porous cap.
  • the fluidized form of the fluidized bed of the sealing material 5 is preferably designed so as to achieve uniform fluidization, but it may be fluidization of bubbles that does not cause slugging. Since the purpose of fluidizing the sealing material 5 in the present embodiment is simply to reduce the resistance of the sealing material 5, fluidization may be minimized. In other words, the flow rate of the fluidized bed gas to be supplied may be set so as to be a slightly higher flow rate than the minimum fluidization rate specific to the selected sealing material 5. When the fluidized bed gas flow rate is set in this manner, the thickness of the fluidized bed when the fluidized bed gas is blown (maximum thickness of the fluidized bed) can be maintained, for example, less than twice that at rest.
  • a part of the fluidized sealing material 5 may be part of the high temperature gas outflow pipes 4, 24, 34 or the high temperature. Since it flows out into the gas inflow pipes 3, 23 and 33, it is not preferable.
  • valve lifting device When the valve body elevating device 8 is installed outside the heating furnace (above the furnace wall 16 of the heating furnace), a commercially available actuator capable of moving up and down can be used. For example, an air cylinder, a hydraulic cylinder, a rack and pinion propulsion device, a ball screw propulsion device, or a linear motor can be used. A heat-resistant actuator may be used for the valve body lifting device 8 and installed in the furnace to reduce the size of the device.
  • the method for adjusting the ascending / descending positions of the valve bodies 2, 22, and 32 may be performed manually, or may be automatically controlled by separately providing a distance meter, a load meter, and a control device.
  • the stroke of the valve body lifting / lowering device 8 can be set to, for example, 50 mm or more and 2 m or less.
  • the heating device 13 for heating the fluidized bed gas is a device for preheating the fluidized bed gas in order to prevent the valve from being cooled by the fluidized bed gas, and is selectively installed.
  • the heating device 13 may be a general fuel gas combustion type heat exchanger, or simply set the fluidized bed gas pipe flow path long and supply gas by heat input from the furnace body to the pipe line. You may heat.
  • any device can be used as long as it has the required strength, rigidity, and durability in an environment from room temperature to a high temperature of about 850 ° C. or about 900 ° C. .
  • a heat resistant stainless steel, a heat resistant cobalt alloy, a metal such as a heat resistant nickel alloy such as Inconel or Hastelloy, or a heat resistant ceramic fiber having flexibility such as a Tyranno fiber is used.
  • graphite, carbon fiber reinforced carbon composite, alumina, calcia, magnesia, silicon carbide, fused quartz, mullite, zirconia, Portland cement, alumina cement, or Silicon nitride or the like can be used.
  • materials with low oxidation resistance such as graphite are used for the members constituting the high-temperature furnace gas gate valve, these materials are applied by maintaining the inside of the furnace in a non-oxidizing atmosphere, for example, a nitrogen atmosphere. can do.
  • Encapsulant Has strength that can withstand fluidization from room temperature to high temperatures of about 850 ° C. or 900 ° C., and does not cause chemical reaction with the working gas, its own thermal decomposition, phase change, significant sintering, or phase transformation.
  • Any material can be used as long as it is a granular material.
  • fused quartz, alumina, calcia, magnesia, zircon, stabilized zirconia, titanium oxide, silicon nitride, or silicon carbide can be used.
  • a gate valve at a temperature of 800 ° C. or higher, it is preferable to use alumina, magnesia, zircon, stabilized zirconia, titanium oxide, silicon nitride, or silicon carbide from the viewpoint of particle stability.
  • the particle diameter of the sealing material is preferably 10 ⁇ m or more and 1 mm or less, more preferably 40 ⁇ m or more and 500 ⁇ m or less. Further, it is particularly preferable that the average particle diameter is 100 ⁇ m or more and 300 ⁇ m or less.
  • the particle size is smaller than 10 ⁇ m, the entire sealing material layer cannot be fluidized even if gas is supplied from the bottom of the fluidized bed because the surface force of the particles is excessive.
  • the particle diameter is larger than 1 mm in diameter, the encapsulating material 5 can be fluidized by increasing the fluidized bed gas supply flow rate, but huge bubbles are generated in the encapsulating material fluidized bed and Rupture on fluidized bed surface.
  • the shape of the sealing material is preferably a spherical shape.
  • the above-mentioned “particles with little change in physical properties” means that the sealing material has a strength that can withstand fluidization at room temperature to about 850 ° C. or about 900 ° C., and a working gas. Mainly consists of granular materials that do not cause chemical reaction, thermal decomposition, phase change, significant sintering, and phase transformation, and contain carbides (solid phase and liquid phase) derived from working gas such as COG. It shows the particles (group) in the state.
  • it has a strength that can withstand fluidization at room temperature to a high temperature of about 850 ° C. or 900 ° C., and has a chemical reaction with the working gas, its own thermal decomposition, phase change, significant sintering, and phase transformation. If carbides such as tar adhere to the surface of particles that do not occur, the physical properties of the particles will change slightly. However, it has the strength to withstand fluidization at room temperature to high temperature of about 850 ° C. or 900 ° C., and has chemical reaction with working gas, its own thermal decomposition, phase change, remarkable sintering, and phase transformation.
  • the encapsulant can withstand fluidization at a temperature from room temperature to about 850 ° C. or about 900 ° C. Has strength.
  • the sealing material is a granular material which does not cause chemical reaction with the working gas, thermal decomposition of itself, phase change, significant sintering, and phase transformation, that is, physical property change is small.
  • it is not necessary to hesitate whether or not such a contaminant is present in the encapsulant, but in the third invention, it is admixed in the encapsulant. Since it is characterized in that it burns and removes carbides that form a kind of sealing material, the sealing material is premised on the presence of such contaminants.
  • These sealing materials may be commercially available or chemically synthesized.
  • any gas can be used as long as it does not corrode or contaminate the device or the sealing material and does not cause a strong reaction with the working gas.
  • a gas such as nitrogen, carbon dioxide, helium, argon, methane, natural gas, LPG, or dry COG can be used.
  • any material can be used as long as it can be gasified by reacting with the carbide and does not corrode the device or the sealing material.
  • air, oxygen, water vapor, or the like can be used.
  • the pad is preferably a material that is stable in the operating temperature range of the valve and is lightweight so as not to hinder the flow of the sealing material.
  • porous or fibrous ceramics can be used.
  • alumina, silicon carbide and the like can be used for a wide range of working gas species.
  • Carbon can also be used when a non-oxidizing working gas is assumed.
  • the pad is thick from the viewpoint that it is not easily moved by the airflow in the valve box.
  • the thickness of the pad is preferably in the range of about 2 to 500 mm.
  • the working gas (high temperature gas) used in the present embodiment is not limited to the wet COG described so far, and the contamination and corrosion of the valve seat and the valve body due to gas components become a problem, and the temperature is from room temperature to 850 ° C.
  • the present invention is applicable to all gas types that must continue to maintain a high temperature, for example, petroleum gas containing zinc vapor or heavy oil vapor.
  • the sealing material is fluidized by the fluidized bed gas supply switching mechanism S, but instead, the valve body 2 stirs the sealing material 5 by opening and closing operations of the gate valves 100, 200, and 300. Also good.
  • the valve box 1, the valve body 2, the inflow pipe 3, the outflow pipe 4, the fluidized bed gas pipe 11, and the heating device 13 in the heating furnace.
  • the temperature difference between the components of the gate valve can be reduced.
  • a valve that circulates high-temperature gas ensures the strength and workability of the valve by keeping the inside of the valve, which is the contact portion with the high-temperature gas, at a high temperature and keeping the outside of the valve at a low temperature. ing.
  • the hot gas passing through the valve is cooled by the valve.
  • the temperature of the entire gate valve can be kept uniform and constant by arranging the gate valve in a heating furnace maintained at substantially the same temperature as the high-temperature gas (gas) passing through the valve.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sliding Valves (AREA)
  • Sealing Material Composition (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
PCT/JP2010/067750 2009-10-09 2010-10-08 仕切弁 Ceased WO2011043463A1 (ja)

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CN201080044735.4A CN102686922B (zh) 2009-10-09 2010-10-08 隔离阀
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CN103711951A (zh) * 2013-12-11 2014-04-09 天津钢研广亨特种装备股份有限公司 砂封温度补偿高温排渣阀门

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US3150680A (en) * 1961-05-20 1964-09-29 Huettenwerk Oberhausen Ag Hot-gas valve
JPS52136944U (OSRAM) * 1976-04-13 1977-10-18

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US3160680A (en) 1962-05-09 1964-12-08 Eastman Kodak Co Poly-alpha-olefin resin composition for coating copper wire and the like
JPS4221847Y1 (OSRAM) * 1964-03-30 1967-12-15
JPS452681Y1 (OSRAM) * 1969-01-10 1970-02-04
JPS587847U (ja) * 1981-07-03 1983-01-19 新日本製鐵株式会社 コ−クス炉上昇管の排熱回収装置
JPS59100834U (ja) * 1982-12-22 1984-07-07 日本鋼管株式会社 コ−クス炉の粗コ−クスガス遮断弁
CA1323339C (en) * 1985-08-01 1993-10-19 James Edward Boone Valve system
JPH0717912B2 (ja) * 1988-09-17 1995-03-01 住友金属工業株式会社 連続成型コークス炉の操業方法
JPH06136290A (ja) * 1992-10-27 1994-05-17 Seika Sangyo Kk 改質無機質粉粒体の製造法
JP4253376B2 (ja) * 1998-08-25 2009-04-08 高砂熱学工業株式会社 空気通路の流量調節装置
CN2536862Y (zh) * 2002-04-29 2003-02-19 马钢设计研究院有限责任公司 钟罩式水封三通切换装置
JP3965097B2 (ja) * 2002-09-18 2007-08-22 新日本製鐵株式会社 室式コークス炉発生ガスの吸引制御機構

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
GB567307A (en) * 1943-08-04 1945-02-07 Woodall Duckham 1920 Ltd Means for controlling the flow of gases through ducts
US3150680A (en) * 1961-05-20 1964-09-29 Huettenwerk Oberhausen Ag Hot-gas valve
JPS52136944U (OSRAM) * 1976-04-13 1977-10-18

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BR112012007797B1 (pt) 2021-02-02
JP2011099559A (ja) 2011-05-19
BR112012007797A2 (pt) 2016-08-16
CN102686922B (zh) 2014-04-16
JP5578006B2 (ja) 2014-08-27
KR101419143B1 (ko) 2014-07-11
CN102686922A (zh) 2012-09-19
KR20120079086A (ko) 2012-07-11
IN2012DN02797A (OSRAM) 2015-07-24

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