阅读说明：本技术 全自动天然气/燃料加热整体式气化器 (Full-automatic natural gas/fuel heating integral gasifier ) 是由 王艇 帕特里克 于 2020-05-28 设计创作，主要内容包括：本发明涉及液化天然气气化系统技术领域,尤其涉及全自动天然气/燃料加热整体式气化器,包括燃烧区和换热区,燃烧区包括燃烧器和燃烧器控制系统,换热区包括水浴储罐、烟囱和循环水泵,水浴储罐内部设置有换热管束、烟气换热管和溢水管,燃烧区内还设置有通风系统和报警系统,燃烧器设置为组合式预混燃烧器,预混燃烧器内设置有锥形螺旋状的预混管,预混燃烧器上设置有导流器,烟气换热管与烟囱连接处设置有节能器,本发明通过特殊结构的预混燃烧器、换热器和节能器提高了热效率,降低了维护成本及电力成本,通过L型与U形结合的烟气换热管提高了换热效率,并且本发明还具有结构紧凑,灵活性高的优点。(The invention relates to the technical field of liquefied natural gas gasification systems, in particular to a full-automatic natural gas/fuel heating integral gasifier, which comprises a combustion area and a heat exchange area, wherein the combustion area comprises a burner and a burner control system, the heat exchange area comprises a water bath storage tank, a chimney and a circulating water pump, a heat exchange tube bundle, a flue gas heat exchange tube and an overflow tube are arranged in the water bath storage tank, a ventilation system and an alarm system are also arranged in the combustion area, the burner is a combined premix burner, a conical spiral premix tube is arranged in the premix burner, a flow director is arranged on the premix burner, and an energy saver is arranged at the joint of the flue gas heat exchange tube and the chimney. The invention also has the advantages of compact structure and high flexibility.)

1. Full-automatic natural gas/fuel heating integral gasifier, including combustion area (1) and heat transfer district (2), its characterized in that: the combustion area (1) comprises a combustor (11) and a combustor control system (12), the heat exchange area (2) comprises a water bath storage tank (21), a chimney (22) and a circulating water pump (23), the circulating water pump (23) is installed on the side of the water bath storage tank (21), and a heat exchange tube bundle (211), a flue gas heat exchange tube (212) and an overflow tube (213) are arranged inside the water bath storage tank (21); the combustion area (1) is communicated with the heat exchange area (2) through a flue gas heat exchange pipe (212), one end of the flue gas heat exchange pipe (212) is connected with the combustor (11), and the other end of the flue gas heat exchange pipe is connected with a chimney (22); the burner control system (12) is embedded in a control cabinet (218) at the end part of the water bath storage tank (21); an LNG liquid inlet (214), a natural gas outlet (215), a water inlet (216) and an overflow water outlet (217) are arranged outside the water bath storage tank (21); one end of the heat exchange tube bundle (211) is connected with the LNG liquid inlet (214), and the other end of the heat exchange tube bundle is connected with the natural gas outlet (215); one end of the overflow pipe (213) is connected with the overflow water outlet (217), and the other end is arranged inside the water bath storage tank (21).

2. The fully automated natural gas/fuel heated integrated gasifier of claim 1, wherein: the combustion area (1) is also internally provided with a ventilation system (13) and an alarm system (14), the ventilation system (13) comprises a ventilation window (131) and a ventilation opening (132), the alarm system (14) comprises an automatic combustion safety warning device (141) and a gas sensor, and the automatic combustion safety warning device (141) is internally provided with an expansion alarm for the state and fault occurrence of a combustor (11).

3. The fully automated natural gas/fuel heated integrated gasifier of claim 1, wherein: the burner (11) is set to be a combined type premixing burner (11), the premixing burner (11) comprises a premixing chamber (111), an igniter (112) and a firing ring (113), a premixing pipe (114) is arranged in the premixing chamber (111), the igniter (112) is arranged at one end, close to the firing ring (113), of the premixing chamber (111), and a fluid director (115) is arranged on the surface of the firing ring (113).

4. The fully automated natural gas/fuel heated integrated gasifier of claim 3, wherein: the premixing pipe (114) is arranged to be in a conical spiral shape, a mixing ring (116) is arranged at the bottom of the premixing pipe (114), a first air inlet pipe (117) and a second air inlet pipe (118) are arranged on two sides of the mixing ring (116), the premixing pipe (114) is fixed inside the premixing chamber (111) through the first air inlet pipe (117) and the second air inlet pipe (118), and the first air inlet pipe (117) and the second air inlet pipe (118) are fixed at one end, far away from the ignition ring (113), of the premixing chamber (111).

5. The fully automated natural gas/fuel heated integrated gasifier of claim 3, wherein: the fluid director (115) is arranged to be semicircular, a through hole (1151) is formed in the top end of the fluid director (115), an auxiliary fire hole (1152) is formed in the side face of the fluid director (115), and the through hole (1151) in the top end of the fluid director (115) and an air outlet hole (1131) in the fire ring (113) are arranged to be of a coaxial line structure.

6. The fully automated natural gas/fuel heated integrated gasifier of claim 1, wherein: an energy saver (24) is arranged at the joint of the flue gas heat exchange tube (212) and the chimney (22), a circulating water tank (241) and an air inlet cylinder (242) are arranged in the energy saver (24), a circulating water pipe (243) is arranged on the side surface of the energy saver (24), the cross section of the circulating water pipe (243) is rectangular, one end of the circulating water pipe (243) is inserted into the energy saver (24) and connected with the bottom of the circulating water tank (241), and the other end of the circulating water pipe (243) is connected with a circulating water pump (23); the circulating water tank (241) is connected with the inner wall of the energy saver (24) through a fixing block (244) arranged inside the energy saver (24), the fixing block (244) is arranged at the upper part of the outer surface of the circulating water tank (241) and is not arranged on the same surface as the circulating water pipe (243), the bottom of the circulating water tank (241) is suspended and is not contacted with any part, an air inlet cylinder (242) is arranged below the circulating water tank (241), one end of the air inlet cylinder (242) is fixedly connected with the bottom of the energy saver (24), the outer side of the lower surface of the energy saver (24) is fixedly connected with the flue gas heat exchange pipe (212) opposite to the air inlet cylinder (242), an air outlet cylinder (245) is arranged at the top of the energy saver (24), and the air outlet cylinder (245) is arranged at the outer side of the energy saver (24).

7. The fully automated natural gas/fuel heated integrated gasifier of claim 6, wherein: the air inlet cylinder (242) is of a cone frustum structure, and the diameter of one end, close to the circulating water tank (241), of the air inlet cylinder (242) is larger than that of one end, fixedly connected with the energy saver (24), of the air inlet cylinder (242).

8. The fully automated natural gas/fuel heated integrated gasifier of claim 6, wherein: the gas outlet cylinder (245) is formed by combining a plurality of arc-shaped pieces, the bottoms of the arc-shaped pieces are fixedly connected with the top of the energy saver (24), the arc length of the top of each arc-shaped piece is smaller than that of the bottom of each arc-shaped piece, and the diameter of the top of the gas outlet cylinder (245) can be changed along with the power of the flue gas discharged from the flue gas heat exchange tube (212): when the power for discharging the flue gas is the maximum, the diameter of the top of the gas outlet cylinder (245) is increased to be as large as the diameter of the bottom of the gas outlet cylinder (245), and the gas outlet cylinder is of a cylindrical structure; when the power for discharging the flue gas is minimum, the diameter of the top of the air outlet cylinder (245) is smaller than that of the bottom of the air cylinder (245), and the air outlet cylinder is of a cone frustum structure.

9. The fully automated natural gas/fuel heated integrated gasifier of claim 1, wherein: the heat exchange tube bundle (211) is arranged to be a detachable structure, and the heat exchange tube bundle (211) is made of a stainless steel U-shaped tube structure.

10. The fully automated natural gas/fuel heated integrated gasifier of claim 1, wherein: the flue gas heat exchange tube (212) is of a structure combining an L-shaped tube and a U-shaped tube, and the overflow tube (213) is of a double U-shaped tube structure.

Technical Field

The invention relates to the technical field of liquefied natural gas gasification systems, in particular to a full-automatic natural gas/fuel heating integral gasifier.

Background

The natural gas is a clean and environment-friendly high-quality energy source, almost does not contain sulfur, dust and other harmful substances, and generates carbon dioxide less than other fossil fuels when being combusted, so that the greenhouse effect is low, and the environmental quality can be fundamentally improved. Along with the rise of social environmental awareness and transformation and upgrading of economic structures in China, the optimization of energy supply structures in China is in progress, and the consumption of natural gas keeps increasing at a high speed for a long time.

LNG is an abbreviation for liquefied natural gas (liquefied natural gas). LNG is natural gas that becomes liquid after being compressed and cooled to its boiling point (-161.5 c). The LNG is colorless, tasteless, nontoxic and noncorrosive, the volume of the LNG is about 1/625 of the volume of the same amount of gaseous natural gas, the weight of the LNG is only about 45% of the same volume of water, and by utilizing the characteristics of the LNG, the LNG is usually stored in a low-temperature storage tank, transported by a special ship or a tank truck and regasified when in use. At present, LNG becomes a main gas source or a transitional gas source of a city which can not use the gas supplied by the pipe-line natural gas, and is also a supplementary gas source or a peak shaving gas source of a plurality of cities which use the gas supplied by the pipe-line natural gas. An LNG vaporization station is a satellite station that receives, stores, and distributes LNG, and is also an intermediate conditioning site for towns or gas companies to transfer LNG from a manufacturer to a customer. By virtue of the advantages of short construction period and capability of rapidly meeting the demand of a gas utilization market, the LNG gasification station is gradually built in a plurality of economically developed and energy-scarce middle and small cities in the south-east coast of China, and becomes a permanent gas supply facility or a transitional gas supply facility before arrival of pipeline natural gas.

The existing LNG gasification device occupies a large area, so that the large-scale development and application of the existing LNG gasification device are restricted, the heating type LNG gasification device is low in heat efficiency, the heat efficiency is mainly influenced by the emission temperature of flue gas, and the reduction of the exhaust gas temperature is one of the problems to be solved in the prior art.

Chinese patent CN201510609508.6 discloses a patent with the name of energy-saving submerged combustion gasifier, which has the technical key points that: an energy-saving submerged combustion gasifier comprises a blower, an air duct, a burner, a combustion chamber, a flue gas distributor, a water tank, a heat exchange tube bundle, a weir flow box, an alkali liquor tank, a chimney, a gas-liquid separator and a smoke window regulating valve; the smoke distributor comprises a collecting pipe and bubbling pipes, one end of each bubbling pipe is communicated with the collecting pipe, the bubbling pipes are positioned below the heat exchange pipe bundle, and the top of each bubbling pipe is provided with at least one row of injection holes; the weir flow box is supported by a bracket fixed at the bottom of the water tank, and the heat exchange tube bundle is suspended and supported by a suspension support structure at the top of the weir flow box and is immersed in the water bath liquid in the water tank; a gas-liquid separator is arranged in the chimney; a bypass is arranged at the lower part of the chimney and is respectively connected with the combustor and the flue gas distributor through a first branch and a second branch; it has solved area big and the not high problem of thermal efficiency, though have in this patent to be provided with the lye tank and be used for neutralizing the water bath liquid, but its maintenance cost has been higher, needs the fan of great horsepower to spout flame into aquatic in addition, has improved the electric power cost of equipment operation.

Disclosure of Invention

The invention provides a full-automatic natural gas/fuel heating integral gasifier aiming at the problems of large occupied area, high maintenance cost and electric power cost but low thermal efficiency.

In order to solve the technical problem, the invention is solved by the following technical scheme:

the full-automatic natural gas/fuel heating integral gasifier comprises a combustion area and a heat exchange area, wherein the combustion area comprises a combustor and a combustor control system, the heat exchange area comprises a water bath storage tank, a chimney and a circulating water pump, the circulating water pump is arranged on the side of the water bath storage tank, a heat exchange tube bundle, a flue gas heat exchange tube and an overflow tube are arranged in the water bath storage tank, and hot water in the water bath storage tank and the heat exchange tube bundle can effectively exchange heat in a natural convection mode through the circulating water pump in the operation process of equipment; the combustion area is communicated with the heat exchange area through a flue gas heat exchange pipe, one end of the flue gas heat exchange pipe is connected with the burner, the other end of the flue gas heat exchange pipe is connected with the chimney, flue gas generated by the burner of the device is discharged after exchanging heat with water in the water bath storage tank through the flue gas heat exchange pipe, and is not in direct contact with the water, so that high-concentration chemical wastewater cannot be generated, and the maintenance cost is reduced; the burner control system is embedded in a control cabinet at the end part of the water bath storage tank and is provided with an inlet hole door; an LNG liquid inlet, a natural gas outlet, a water inlet and an overflow water outlet are arranged outside the water bath storage tank; one end of the heat exchange tube bundle is connected with the LNG liquid inlet, and the other end of the heat exchange tube bundle is connected with the natural gas outlet; one end of the overflow pipe is connected with the overflow water outlet, and the other end of the overflow pipe is arranged in the water bath storage tank.

Preferably, a ventilation system and an alarm system are further arranged in the combustion area, the ventilation system comprises a ventilation window and a ventilation opening, the ventilation system can ensure good ventilation of the combustion chamber and can also reduce the influence of external environmental factors on main components such as a combustor and the like; the alarm system comprises an automatic combustion safety warning device and a gas sensor, wherein an expansion alarm for the state and fault occurrence of the burner is arranged in the automatic combustion safety warning device, and when the burner system is closed, the control panel can display the fault position and give out a sound alarm; the automatic safety protection system for the flame of the burner can meet the requirement of frequent on-site starting or suspension operation.

Preferably, the burner is a combined premixing burner, the nitrogen oxide emission of the selected premixing burner is lower than that of a standard burner, a flue gas recirculation system does not need to be additionally arranged on the equipment, the premixing burner comprises a premixing chamber, an igniter and an ignition ring, a premixing pipe is arranged in the premixing chamber, the igniter is arranged at one end, close to the ignition ring, of the premixing chamber, a fluid director is arranged on the surface of the ignition ring, the device can provide 100% of single burner systems, 100% of two burner systems or 50% of two burner systems, and the gasification flow can be automatically adjusted according to the actual operation condition of a project.

Preferably, the premixing pipe is arranged in a conical spiral shape, the bottom of the premixing pipe is provided with the mixing ring, a first air inlet pipe and a second air inlet pipe are arranged on two sides of the mixing ring, the premixing pipe is fixed inside the premixing chamber through the first air inlet pipe and the second air inlet pipe, and the first air inlet pipe and the second air inlet pipe are fixed at one end, far away from the ignition ring, of the premixing chamber.

Preferably, the fluid director is in a semicircular shape, the top end of the fluid director is provided with a through hole, the side surface of the fluid director is provided with an auxiliary fire hole, the through hole at the top end of the fluid director and the air outlet hole on the ignition ring are in a coaxial line structure, in order to enable fuel to be combusted more fully, most of combustible gas discharged from the air outlet hole can be discharged from the through hole at the top end of the fluid director, and the combustible gas discharged from the through hole can not circulate in the ignition ring but can be discharged from the auxiliary fire hole and ignited, so that the combustion efficiency is improved, and the water temperature is accelerated to be increased.

Preferably, an energy saver is arranged at the joint of the flue gas heat exchange tube and the chimney, a circulating water tank and an air inlet cylinder are arranged in the energy saver, a circulating water pipe is arranged on the side surface of the energy saver, the section of the circulating water pipe is rectangular, and one end of the circulating water pipe is inserted into the energy saver and connected with the bottom of the circulating water tank, so that the energy saver can play a role in water circulation and can play a certain supporting role to prevent the water tank from falling down; the other end of the circulating water pipe is connected with a circulating water pump; the circulating water tank is connected with the inner wall of the energy saver through a fixing block arranged in the energy saver, the fixing block is arranged on the upper part of the outer surface of the circulating water tank and is not arranged on the same surface as the circulating water pipe, so that the supporting force for supporting the water tank is uniformly distributed, and the situation of part strain caused by nonuniform force distribution after long-term use is prevented; the air inlet cylinder is arranged below the circulating water tank, the bottom of the circulating water tank is suspended and does not contact with any part, the circulating water tank is prevented from being damaged due to long-term high temperature, one end of the air inlet cylinder is fixedly connected with the bottom of the energy saver, the outer side of the lower surface of the energy saver is fixedly connected with the air inlet cylinder and the flue gas heat exchange tube, the top of the energy saver is provided with the air outlet cylinder, the air outlet cylinder is arranged on the outer side of the energy saver, and the energy saver can guarantee that the temperature of flue gas discharged from a chimney is controlled to be about 65-100 ℃.

As preferred, the air inlet cylinder sets up to the circular cone structure, and the diameter that the air inlet cylinder is close to circulating water tank one end is greater than the diameter of keeping away from circulating water tank one end, and circular cone structural design makes the area of contact of exhaust flue gas and circulating water tank bottom bigger to improve heat exchange efficiency.

As preferred, go out the gas cylinder and form by a plurality of arcs piece combinations, the bottom of arc piece and the top fixed connection of energy-saving appliance, arc piece top arc length is less than arc piece bottom arc length, goes out the diameter at gas cylinder top and can change along with the flue gas exhaust power size in the flue gas heat exchange tube: when the power for discharging the flue gas is the maximum, the diameter of the top of the gas outlet cylinder is increased to be as large as the diameter of the bottom of the gas outlet cylinder, and the gas outlet cylinder is of a cylindrical structure; when the power of the flue gas exhaust is the minimum, the diameter of the top of the gas outlet cylinder is smaller than that of the bottom of the gas cylinder, and the gas outlet cylinder is of a cone frustum structure.

As preferred, heat exchange tube bank sets up to detachable construction, and heat exchange tube bank is made by stainless steel U type tubular construction, and this structure has improved gasification efficiency, has low stress, low temperature resistant characteristic, has prolonged the working life of equipment.

Preferably, the flue gas heat exchange pipe is arranged to be of a structure combining an L-shaped pipe and a U-shaped pipe, the overflow pipe is arranged to be a double U-shaped pipe, the structure is efficient, the heat transfer efficiency of the fire pipe can reach more than 90%, the fuel cost can be reduced, compared with the SCV (small scale vehicle) device, a fan with larger horsepower is needed to spray flame into water (the horsepower of the fan needed by the SCV is more than 5 times higher than that of the device), and therefore the electric power cost for operating the device is increased.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that:

the invention can be assembled into a skid-mounted gasifier without external pipelines and heaters, does not need additional equipment and pipeline connection, can meet the requirement that a gasifier with larger flow is required due to limited occupied area of a customer site by a compact design, can be moved or made into a movable gasification system when necessary, and is more flexible and mobile; the heat exchange tube bank sets up the detachable construction of making into by stainless steel U type tubular construction, gasification efficiency has been improved, low stress, low temperature resistant characteristic has been had, the working life of equipment has been prolonged, the flue gas that this device's combustor produced is discharged after passing through the water heat transfer in flue gas heat exchange pipeline and the water bath storage tank, not with water direct contact, therefore can not produce the chemical waste water of high concentration, the maintenance cost is reduced, pollution is reduced, special energy-saving appliance and premixing chamber structure have improved heat exchange efficiency and combustion efficiency.

Drawings

Fig. 1 is a schematic plan view of the structure of embodiment 1 of the present invention.

Fig. 2 is a schematic view of embodiment 1 of the present invention.

FIG. 3 is a schematic view of the construction of a premix burner in example 1 of the present invention.

FIG. 4 is a schematic view showing the structure of a premix tube in example 1 of the present invention.

FIG. 5 is a schematic cross-sectional view of the fixed connection between the deflector and the ignition ring in example 1 of the present invention.

Fig. 6 is a schematic structural view of a fluid director in embodiment 1 of the present invention.

Fig. 7 is a schematic structural view of an economizer in embodiment 1 of the present invention.

Fig. 8 is a top view of fig. 7.

Fig. 9 is a schematic cross-sectional view of C-C in fig. 8.

Fig. 10 is a schematic view of the internal structure of an economizer in embodiment 1 of the present invention.

The names of the parts indicated by the numerical references in the drawings are as follows: wherein, 1-combustion area, 11-combustor, 111-premixing chamber, 112-igniter, 113-ignition ring, 1131-air outlet, 114-premixing tube, 115-deflector, 1151-through hole, 1152-auxiliary fire hole, 116-mixing ring, 117-first air inlet tube, 118-second air inlet tube, 12-combustor control system, 13-ventilation system, 131-ventilation window, 132-ventilation opening, 14-alarm system, 141-automatic combustion safety warning device, 2-heat exchange area, 21-water bath storage tank, 211-heat exchange tube bundle, 212-flue gas heat exchange tube, 213-overflow tube, 214-LNG liquid inlet, 215-natural gas outlet, 216-water inlet, 217-overflow water outlet, 218-control cabinet, 22-chimney, 23-circulating water pump, 24-energy saver, 241-circulating water tank, 242-air inlet cylinder, 243-circulating water pipe, 244-fixed block and 245-air outlet cylinder.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.