CN112984375B - High-efficient submerged combustion formula gasifier - Google Patents

High-efficient submerged combustion formula gasifier Download PDF

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Publication number
CN112984375B
CN112984375B CN202110166931.9A CN202110166931A CN112984375B CN 112984375 B CN112984375 B CN 112984375B CN 202110166931 A CN202110166931 A CN 202110166931A CN 112984375 B CN112984375 B CN 112984375B
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China
Prior art keywords
cover plate
water bath
panel
plate
heat exchange
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CN202110166931.9A
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Chinese (zh)
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CN112984375A (en
Inventor
郭宏新
高辉
刘丰
刘世平
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Jiangsu Zhongsheng Pressure Vessel Equipment Manufacturing Co ltd
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Jiangsu Zhongsheng Pressure Vessel Equipment Manufacturing Co ltd
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Publication of CN112984375A publication Critical patent/CN112984375A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
    • F24H7/025—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using fluid fuel
    • F24H7/0266—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using fluid fuel the transfer fluid being water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a high-efficiency submerged combustion gasifier, which comprises a blower, an air duct, a burner, a water bath, a heat exchange tube bundle, an alkali liquor tank, a chimney and a water bath sealing cover plate, wherein the water bath sealing cover plate comprises a panel which is formed by splicing a plurality of pattern steel plates, and connecting steel pieces are arranged below the peripheral edges of the panel to fix the cover plate on the upper edge of the wall of the water bath through the connecting steel pieces; a drainage ditch is arranged at the splicing position of two adjacent pattern steel plates; the panel is provided with a manhole, an LNG inlet pipe hole used for the LNG inlet pipe of the heat exchange pipe bundle to pass through the cover plate in the water bath pool, an NG outlet pipe hole used for the NG outlet pipe of the heat exchange pipe bundle to pass through the cover plate, a burner hole used for installing a burner and an observation hole used for observing the water bath pool. The heat exchange tube bundle can effectively improve the heat exchange efficiency; the apron can play better sealed effect, avoids the water spill apron in the water bath, also avoids external water and impurity to enter into the water bath, guarantees that equipment can even running.

Description

Efficient submerged combustion type gasifier
Technical Field
The invention belongs to the technical field of liquefied natural gas gasification, relates to a novel submerged combustion gasifier, and particularly relates to a high-efficiency heat exchange type submerged combustion gasifier convenient to mount and dismount.
Background
Submerged combustion gasifiers (SCVs) exchange heat by direct mixing of the hot gases of fuel combustion with water. The heat exchange coil for heating the LNG is immersed in a water bath, and the hot water heats and gasifies the LNG in the heat exchange coil. The SCV has fast starting speed and is suitable for the fast starting requirement of emergency or peak load regulation.
The existing submerged combustion type gasifier used in the LNG receiving station comprises a blower, an air duct, a burner, a water bath, a heat exchange tube bundle, an alkali liquor tank, a chimney, an overflow tank and the like. The air and the fuel gas are fully mixed in the combustor and then are combusted to generate high-temperature flue gas which is used for heating water in the water bath, and LNG in the hot water heating heat exchange coil pipe is gasified to generate NG to enter an external conveying pipe network. The heat exchange coil is made of 304 stainless steel, and has higher requirement on the content of chloride ions in water in the water bath. Because LNG receiving station is mostly at the seaside of high salt fog corruption, and the sealed degree of current submerged combustion formula vaporizer water bath apron is not enough, and the rainwater on the apron often can leak to the water bath in the pond, has on the apron that the water that has corrosivity leaks equipment such as heat transfer coil in the water bath, causes harm to equipment. SCV can produce a large amount of flue gases at the operation in-process, and the water bath apron is sealed inadequately, leads to the faintly acid water in the water bath to flow on the water bath apron or the wall, corrodes the water bath apron. In winter, the cover plate and the equipment are frozen, and the safety of inspection personnel is threatened.
Disclosure of Invention
The invention aims to overcome the defects of low heat exchange efficiency, poor sealing performance of a cover plate, easy leakage and poor corrosion prevention effect of the conventional submerged combustion gasifier, and provides a high-efficiency submerged combustion gasifier adopting a high-efficiency heat exchange tube bundle and a novel water bath cover plate, which obviously improves the heat exchange efficiency and has good sealing performance and good drainage performance of the novel water bath cover plate.
The purpose of the invention is realized by the following technical scheme:
a high-efficiency submerged combustion gasifier comprises a blower 9, an air duct 10, a burner 14, a water bath 2, a heat exchange tube bundle 15, an alkali liquor tank 16, a chimney 17 and a water bath sealing cover plate, wherein the water bath sealing cover plate comprises a panel 1, the panel 1 is formed by splicing a plurality of pattern steel plates, and a connecting steel piece is arranged below the peripheral edge of the panel 1 to fix the cover plate on the upper edge of the wall of the water bath through the connecting steel piece; a drainage ditch 8 is arranged at the splicing position of two adjacent pattern steel plates and used for draining the water accumulated on the cover plate; the panel 1 is provided with a manhole 3, an LNG inlet pipe hole 4 for a heat exchange pipe bundle LNG inlet pipe to pass through a cover plate in a water bath pool, an NG outlet pipe hole 7 for a heat exchange pipe bundle NG outlet pipe to pass through the cover plate, a burner hole 5 for installing a burner and an observation hole 6 for observing the water bath pool; the manhole 3 is provided with a manhole cover plate 32, the manhole cover plate 32 is connected with a sliding channel 33 arranged on the lower surface of the panel 1 in a sliding manner, the manhole cover plate 32 is provided with a handle 31, and the manhole cover plate 32 is pushed and pulled to slide along the sliding channel through the handle 31; the observation hole 6 is provided with an observation hole cover plate 61.
The heat exchange tube bundle is a high-efficiency heat exchange tube bundle formed by at least one heat exchange tube of smooth tubes or internal-corrugation external-thread tubes, corrugated tubes, high-flux tubes, pitted-surface tubes and channel tubes, can effectively improve the heat exchange efficiency, particularly enhances the disturbance of a fluid medium under the condition of low working load, and can improve the heat exchange efficiency by more than 30 percent. The heat exchange tube is made of stainless steel, titanium alloy and antirust coating carbon steel.
The panel 1 is formed by splicing 2-6 pieces of pattern steel plates. The invention selects the pattern steel plate to play a role of skid resistance; meanwhile, the area of the panel is large (generally 10m in length and 6m in width), and the panel is spliced by adopting a pattern steel plate, so that the panel is convenient to manufacture and transport.
The panel 1 and the connecting steel piece are made of carbon steel, and anticorrosive coatings are coated on the surfaces of the panel 1 and the connecting steel piece to form anticorrosive coatings.
The decorative pattern steel plate and the connecting steel piece are welded to form an integral panel 1, the panel 1 is fixed on the upper edge of the wall of the water bath pool 2 through chemical bolts 12, and a rubber gasket 13 is arranged between the connecting steel piece and the water bath pool 2 for water proofing. Civil engineering and equipment installation errors can be avoided by using the chemical bolts 12 for site construction. Rubber gasket 13 can prevent effectively that the water in the water bath 2 from revealing outside the water bath, influence equipment life, avoid freezing the injury in winter and patrol and examine personnel personal safety.
The chemical rubber pipe of the chemical bolt 12 is arranged in the wall of the water bath 2, a screw penetrates through the connecting steel piece 11 and the rubber gasket 13 and then is screwed into the chemical rubber pipe, the screw and the wall of the water bath 2 are bonded with the screw and the wall of the hole through synthetic resin mortar to form a whole, and then the screw, the wall of the water bath 2 and the panel 1 are sleeved with a gasket and screwed by a nut.
The connecting steel piece is selected from H-shaped steel, I-shaped steel, angle steel, channel steel and T-shaped steel; considering that the H-shaped steel and the I-shaped steel are beneficial to arranging the rubber gasket, the connecting steel piece is selected from the H-shaped steel and the I-shaped steel.
The drainage ditch 8 is composed of two adjacent pattern steel plates and a bottom plate 81 positioned on the lower surfaces of the pattern steel plates, a gap is reserved between the two adjacent pattern steel plates to enable the width of the drainage ditch to be 5-20 mm, the depth is determined by the thickness of the panel, and the drainage ditch 8 is lower than the surface of the panel 1; a rubber gasket is provided between the lower surface of the pattern steel plate and the bottom plate 81. Because the water bath has a certain inclination angle, the rainwater on the panel can be drained through the drainage ditch.
Preferably, the bottom plate 81 is fixed to the pattern steel plate by bolts.
The quantity of manhole 3 be 2 at least, when overhauing, open all manholes, keep the circulation of air in the water bath, avoid the oxygen content in the water bath to be low, avoid stifling.
The LNG inlet pipe hole 4 and the NG outlet pipe hole 7 have the same structure and comprise a plurality of layers of corrugated rubber pipes 44, the plurality of layers of corrugated rubber pipes 44 are 2-5 layers of zipper type corrugated pipes with the diameters gradually increasing from top to bottom, the plurality of layers of corrugated rubber pipes 44 penetrate through annular gaps between reserved holes of NG outlet pipes/LNG inlet pipes and NG outlet pipes/LNG inlet pipes 41 of the panel, pipe hoops 42 are arranged at the upper ends of the plurality of layers of corrugated rubber pipes and used for fixing the plurality of layers of corrugated rubber pipes with the NG outlet pipes/LNG inlet pipes 41, and annular pressing plates 45, rubber gaskets and water blocking plates 46 are sequentially arranged on the outer sides of the plurality of layers of expanded rubber pipes 44 from top to bottom; the pressing plate 45 is used for pressing a rubber gasket and is fixed on the panel 1 through a bolt 47, and the water baffle and the rubber gasket are used for preventing water from leaking into the water bath. The multilayer corrugated rubber pipe 44 can move left and right by 0-50mm, so that the installation error of the NG pipeline or the LNG pipeline and the cover plate is avoided.
The multi-layer corrugated rubber pipe 44 is formed by connecting two corrugated rubber semi-circular pipes through a zipper 43.
The burner hole 5 comprises a preformed hole for installing a burner on a cover plate, and a water baffle plate 51 is arranged along the preformed hole; the water-retaining weir plate 51 comprises a cylindrical water-retaining plate, wherein a first annular plate and a second annular plate are respectively arranged at the upper end and the lower end of the cylindrical water-retaining plate, the second annular plate surrounds the preformed hole and is fixed on the panel 1, the first annular plate is provided with a bolt for fixing the combustor, and a buffer rubber gasket is arranged between the first annular plate and the combustor.
The observation hole cover plate 61 is provided with two symmetrical pull latches 62 which are connected through a chain 63; the lower surface of the observation hole cover plate 61 is provided with a bolt groove 64, the bolt 62 is positioned in the bolt groove 64, the lower surface of the panel 1 is provided with a U-shaped card 65 corresponding to the bolt, the bolt 62 slides along the bolt groove until one end of the bolt extends into the U-shaped card, and the bolt is clamped by the U-shaped card. Putting down the observation hole cover plate 61, pulling the two pull latches 62 to slide oppositely until one ends of the pull latches are buckled into the U-shaped clamp 65, and fixing the observation hole cover plate on the cover plate so as to prevent water in the water bath from splashing out and leaking into the water bath; meanwhile, the chain can be tightly attached to the observation hole cover plate, and accidents of tripping inspection personnel caused by the adoption of a handle and the like are avoided. If the observation hole is to be opened, the two pull bolts are pulled to relatively slide along the pull bolt grooves, so that the pull bolts slide out of the U-shaped clamps on the cover plate, the chain 63 is lifted, the cover plate of the observation hole can be opened, and the working condition in the water bath tank can be observed.
Preferably, the lower part of the edge of the observation hole 6 extends to make the edge of the observation hole 6 in a step shape, the upper part of the edge of the observation hole cover plate 61 extends to make the observation hole cover plate in a step shape, and the observation hole cover plate 61 is lapped with the panel 1.
The invention has the following beneficial effects:
1. the heat exchange tube bundle is a high-efficiency heat exchange tube bundle, can be a smooth tube or an internal-corrugation external-thread tube, a corrugated tube, a high-flux tube, a pitted-surface tube or a channel tube, can effectively improve the heat exchange efficiency, particularly enhances the disturbance of a fluid medium under the condition of low working load, and can improve the heat exchange efficiency by more than 30 percent.
2. The panel adopts connecting steel spare, decorative pattern steel sheet welding to form to with the form of chemical bolt fastening on the water bath pool wall, can eliminate water bath civil engineering and equipment fixing error, the monoblock apron possesses the removal space. Rubber gasket's installation also plays waterproof sealing effect, avoids the water spill apron in the water bath, also avoids external water and impurity to enter into the water bath in, guarantees that equipment can even running, is applicable to various submerged combustion formula gasifiers.
3. The error of apron and heat exchanger tube bank installation can be eliminated to the structure of LNG entry tube hole and NG export tube hole, and multilayer inflation rubber tube can remove about, can avoid the gap that pipeline expend with heat and contract with cold and lead to, plays sealed effect.
4. The cover plate observation hole can be used for observing the working conditions in the water bath tank at any time.
5. The gap of the junction of the cover plate and the combustor can be avoided by the combustor hole, water leakage into the water bath pool is prevented, and water in the water bath pool is prevented from splashing on the cover plate.
6. Two manholes on the cover plate can be pushed open and closed, so that people can conveniently go in and out for maintenance.
7. The invention can drain water accumulated on the cover plate through the drainage ditch, prevent rainwater from corroding the panel and prevent icing from damaging the body of an inspector.
Drawings
FIG. 1 is a schematic view of the structure of a high efficiency submerged combustion gasifier according to the present invention.
Fig. 2 is a schematic structural view of a sealing cover plate for a water bath of a submerged combustion gasifier according to the present invention.
FIG. 3 is a schematic view of the panel of the sealing cover plate for the water bath of the submerged combustion gasifier and the water bath installation.
Fig. 4 is a schematic view showing the structure of a drain of a sealing cover plate for a water bath of a submerged combustion type gasifier.
Fig. 5 is a schematic structural view of a manhole of a sealing cover plate for a water bath of a submerged combustion type gasifier.
Fig. 6 is a schematic view of the structure of the LNG inlet/NG outlet pipe hole of the sealing cover plate for the water bath of the submerged combustion type gasifier.
Fig. 7 is a top view of fig. 6.
FIG. 8 is a schematic view of the structure of the burner holes of the sealing cover plate for the water bath of the submerged combustion gasifier.
Fig. 9 is a schematic view of the structure of a view port cover of a sealing cover for a water bath of a submerged combustion gasifier.
Fig. 10 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 9.
Detailed Description
The technical solution of the present invention is further explained with reference to the drawings and the embodiments.
Example 1
As shown in fig. 1, a high-efficiency submerged combustion gasifier comprises a blower 9, an air duct 10, a burner 14, a water bath 2, a heat exchange tube bundle 15, an alkali liquor tank 16, a chimney 17, an overflow tank 18 and a water bath sealing cover plate; the heat exchange tube bundle 15 is a high-efficiency heat exchange tube bundle composed of smooth tubes, and the heat exchange tubes are made of stainless steel.
As shown in fig. 2-9, the sealing cover plate for the water bath comprises a panel 1, wherein the panel 1 is formed by splicing 5 patterned steel plates, a gap with the width of 5-20 mm is reserved at the splicing position of two adjacent patterned steel plates, a bottom plate 81 is arranged on the lower surface of two adjacent patterned steel plates to form a drainage ditch 8, a rubber gasket is arranged between the lower surface of the patterned steel plate and the bottom plate 81, the bottom plate 82 is fixed with the patterned steel plates through bolts, and the depth of the drainage ditch 8 is determined by the thickness of the panel; the lower part of the peripheral edge of the panel 1 is welded with H-shaped steel 11, a rubber gasket 13 is arranged between the H-shaped steel 11 and the water bath 2 for water prevention, and the H-shaped steel 11 is fixed on the upper edge of the wall of the water bath by chemical bolts 11.
The panel 1 is provided with 2 personal holes 3, an LNG inlet pipe hole 4 for a heat exchange pipe bundle LNG inlet pipe to pass through a cover plate in a water bath pool, an NG outlet pipe hole 7 for a heat exchange pipe bundle NG outlet pipe to pass through a cover plate, a burner hole 5 for installing a burner and an observation hole 6 for observing the water bath pool.
The manhole 3 is provided with a manhole cover plate 32, the manhole cover plate 32 is in sliding connection with a sliding channel 33 arranged on the lower surface of the panel 1, the manhole cover plate 32 is provided with a handle 31, and the manhole cover plate 32 is pushed and pulled to slide along the sliding channel 33 through the handle 31.
The LNG inlet pipe hole 4 and the NG outlet pipe hole 7 have the same structure and comprise a plurality of layers of corrugated rubber pipes 44, the plurality of layers of corrugated rubber pipes 44 are 2-5 layers of zipper type corrugated pipes with the diameters gradually increasing from top to bottom, the plurality of layers of corrugated rubber pipes 44 penetrate through annular gaps between reserved holes of NG outlet pipes/LNG inlet pipes and NG outlet pipes/LNG inlet pipes 41 of the panel, pipe hoops 42 are arranged at the upper ends of the plurality of layers of corrugated rubber pipes and used for fixing the plurality of layers of corrugated rubber pipes with the NG outlet pipes/LNG inlet pipes 41, and annular pressing plates 45, rubber gaskets and water blocking plates 46 are sequentially arranged on the outer sides of the plurality of layers of expanded rubber pipes 44 from top to bottom; the pressing plate 45 is used for pressing the rubber gasket and is fixed on the panel 1 by a bolt 47. The multilayer corrugated rubber pipe 44 can move left and right by 0-50mm, so that the installation error of the NG pipeline or the LNG pipeline and the cover plate is avoided. And the inlet of the heat exchange tube bundle 15 is connected with the LNG inlet pipe, and the outlet of the heat exchange tube bundle 15 is connected with the NG outlet pipe.
The burner hole 5 comprises a preformed hole which is used for installing the burner 14 on the cover plate, and a water baffle plate 51 is arranged along the preformed hole; the water-retaining weir plate 51 comprises a cylindrical water-retaining plate, wherein a first annular plate and a second annular plate are respectively arranged at the upper end and the lower end of the cylindrical water-retaining plate, the second annular plate surrounds the preformed hole and is fixed on the panel 1, the first annular plate is provided with a bolt for fixing the combustor, and a buffer rubber gasket is arranged between the first annular plate and the combustor. The burner 14 is mounted in a prepared hole of the burner hole 5 and is fixed to the first annular plate by means of bolts.
The observation hole cover plate 61 is provided with two symmetrical pull latches 62 which are connected through a chain 63; the lower surface of the observation hole cover plate 61 is provided with a bolt groove 64, the bolt 62 is positioned in the bolt groove 64, the lower surface of the panel 1 is provided with a U-shaped card 65 corresponding to the bolt, the bolt 62 slides along the bolt groove until one end of the bolt extends into the U-shaped card, and the bolt is clamped by the U-shaped card. Putting down the observation hole cover plate 61, pulling the two pull latches 62 to slide oppositely until one ends of the pull latches are buckled into the U-shaped clamp 65, and fixing the observation hole cover plate on the cover plate so as to prevent water in the water bath from splashing out and leaking into the water bath; meanwhile, the chain can be tightly attached to the observation hole cover plate, and accidents of tripping inspection personnel caused by the adoption of a handle and the like are avoided. If the observation hole is to be opened, the two pull bolts are pulled to relatively slide along the pull bolt grooves, so that the pull bolts slide out of the U-shaped clamps on the cover plate, the chain 63 is lifted, the cover plate of the observation hole can be opened, and the working condition in the water bath tank can be observed.
Specifically, the panel 1 has a length of 10m and a width of 6m.
The panel 1 and the connecting steel piece 11 are made of carbon steel, and anticorrosive coatings are coated on the surfaces of the panel 1 and the connecting steel piece 11 to form anticorrosive coatings.
The multi-layer corrugated rubber pipe 44 is formed by connecting two corrugated rubber semi-circular pipes through a zipper 43.
Example 2
On the basis of example 1, the following were adjusted: the lower part of the edge of the observation hole 6 extends out to lead the edge of the observation hole 6 to be step-shaped, the upper part of the edge of the observation hole cover plate 61 extends out to lead the observation hole cover plate to be step-shaped, and the observation hole cover plate 61 is lapped with the panel 1.
Example 3
The heat exchange tube bundle is a high-efficiency heat exchange tube bundle formed by corrugated tubes, and the heat exchange tubes are made of stainless steel.
Example 4
The heat exchange tube bundle is a high-efficiency heat exchange tube bundle formed by channel tubes, and the heat exchange tubes are made of stainless steel.
The invention is not limited to the precise arrangements that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the claims that follow.

Claims (6)

1. An immersed combustion type gasifier comprises a blower, an air duct, a burner, a water bath, a heat exchange tube bundle, an alkali liquor tank, a chimney and a water bath sealing cover plate, and is characterized in that the water bath sealing cover plate comprises a panel, the panel is formed by splicing a plurality of pattern steel plates, a connecting steel piece is arranged below the peripheral edge of the panel, the pattern steel plates and the connecting steel piece are fixedly welded, the connecting steel piece is selected from H-shaped steel, I-shaped steel, angle steel, channel steel and T-shaped steel, the connecting steel piece is fixed on the upper edge of the wall of the water bath through chemical bolts, and a rubber gasket is arranged between the connecting steel piece and the water bath; a drainage ditch is arranged at the splicing position of two adjacent pattern steel plates and used for draining the water accumulated on the cover plate; the panel is provided with a manhole, an LNG inlet pipe hole used for a heat exchange pipe bundle LNG inlet pipe to pass through the cover plate in the water bath pool, an NG outlet pipe hole used for a heat exchange pipe bundle NG outlet pipe to pass through the cover plate, a burner hole used for installing a burner and an observation hole for observing the water bath pool; the LNG inlet pipe hole and the NG outlet pipe hole have the same structure and comprise a plurality of layers of corrugated rubber pipes, the plurality of layers of corrugated rubber pipes are 2-5 layers of zipper-type corrugated pipes with diameters gradually increased from top to bottom, the plurality of layers of corrugated rubber pipes penetrate through the annular gaps between the NG outlet pipe/LNG inlet pipe preformed holes of the panel and the NG outlet pipe/LNG inlet pipe, the upper ends of the plurality of layers of corrugated rubber pipes are provided with pipe hoops for fixing with the NG outlet pipe/LNG inlet pipe, and the outer sides of the plurality of layers of expanded rubber pipes are sequentially provided with annular pressing plates, rubber gaskets and water retaining plates from top to bottom; the pressing plate is fixed on the panel by bolts; the burner hole comprises a preformed hole which is used for installing the burner and arranged on the cover plate, and a water baffle weir plate is arranged along the preformed hole; the water-retaining weir plate comprises a cylindrical water-retaining plate, wherein a first annular plate and a second annular plate are respectively arranged at the upper end and the lower end of the cylindrical water-retaining plate, the second annular plate surrounds the preformed hole and is fixed on the panel, the first annular plate is provided with a bolt for fixing the combustor, and a buffer rubber gasket is arranged between the first annular plate and the combustor; the manhole is provided with a manhole cover plate, the manhole cover plate is connected with a sliding channel arranged on the lower surface of the panel in a sliding mode, the manhole cover plate is provided with a handle, and the manhole cover plate is pushed and pulled to slide along the sliding channel through the handle; the observation hole is provided with an observation hole cover plate.
2. The submerged combustion gasifier as claimed in claim 1, wherein the sealing cover plate of the water bath is easy to install and disassemble, and the panel is formed by splicing 2-6 pieces of steel plates with patterns; the panel and the connecting steel piece are made of carbon steel, and the surfaces of the panel and the connecting steel piece are coated with anticorrosive paint to form an anticorrosive coating.
3. The submerged combustion gasifier as claimed in claim 1, wherein the heat exchange tube bundle is a high efficiency heat exchange tube bundle comprising at least one of smooth tubes or internally corrugated and externally threaded tubes, corrugated tubes, high flux tubes, pitted tubes, and grooved tubes; the heat exchange tube is made of stainless steel, titanium alloy and antirust coating carbon steel.
4. The submerged combustion gasifier according to claim 1, wherein the drainage ditch is formed by two adjacent patterned steel plates and a bottom plate positioned on the lower surface of the patterned steel plate, and a gap is reserved between the two adjacent patterned steel plates to ensure that the width of the drainage ditch is 5-20 mm; a rubber gasket is arranged between the lower surface of the patterned steel plate and the bottom plate; the bottom plate is fixed with the pattern steel plate through bolts.
5. The submerged combustion gasifier as claimed in claim 1, wherein the number of manholes is at least 2.
6. The submerged combustion gasifier as claimed in claim 1, wherein the manhole cover plate is provided with two symmetrical latches, which are connected by a chain; the lower surface of the observation hole cover plate is provided with a bolt groove, the bolt is positioned in the bolt groove, the lower surface of the panel is provided with a U-shaped clamp corresponding to the bolt, and the bolt slides along the bolt groove until one end of the bolt extends into the U-shaped clamp.
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