Steam composite air bath type gasification device

Abstract

The utility model discloses a steam composite air bath type gasification device which comprises a first finned tube, a second finned tube, a rear end finned tube, a first three-way valve, a second three-way valve, a water bath heater, a liquid inlet tube and a gas outlet tube. An inlet of the first finned tube is connected with the liquid inlet tube, an inlet of the second finned tube is connected with the liquid inlet tube, a heating inlet of the water bath heater is connected with the liquid inlet tube, and the second three-way valve is connected with an inlet of the first finned tube, an inlet of the second finned tube and a heating outlet of the water bath heater. Outlets of the first finned tube and the second finned tube are connected with an inlet of the rear-end finned tube, and an outlet of the rear-end finned tube is connected with the gas outlet tube. According to the utility model, the efficiency and the yield of the vaporizer can be improved, and the defrosting on the surface of the heat exchange finned tube is realized and the efficiency of the vaporizer is improved by switching the working valves under the condition that the vaporization amount of the device is not changed.

Description

Technical Field

[0001] The utility model relates to the technical field of air-bath type gasifiers, in particular to a steam compound air-bath type gasifier. Background Art

[0002] In the field of air separation and natural gas and petroleum, liquefied oxygen and nitrogen, liquefied petroleum gas and liquefied natural gas are transformed from liquid to gas under the action of decompression and gasification, and supplied to external product pipelines. The air bath vaporizer is the main device for gasification of liquid gas. It uses the flow of air to heat the liquid, obtains the maximum heat energy from the atmosphere, and realizes the process of gasification of liquid gas. It is widely used in the fields of petrochemical and air separation.

[0003] The air bath vaporizer does not require external heat supply and obtains the heat required for vaporization through the aluminum alloy finned tubes on the heat exchange device. Due to the high density of the finned tubes, the air heat exchange efficiency is not high, and the surface of the finned tubes at the front end of the liquid heat exchange is prone to frost. When the external temperature is low, the heat exchange effect of the air bath vaporizer is reduced, and the gas vaporization efficiency is low. When the gasification demand increases, it cannot provide a stable amount of gas. Utility Model Content

[0004] 1. Technical problems to be solved by the utility model

[0005] The utility model aims to solve the technical problems existing in the prior art and provide a steam compound air bath type gasification device, which can improve the efficiency and output of the gasifier and realize defrosting of the surface of the heat exchange fin tube while ensuring that the gasification amount of the device remains unchanged by switching the working valve, thereby improving the efficiency of the gasifier.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the technical solution provided by the utility model is:

[0008] A steam compound air bath type gasification device comprises a first fin tube, a second fin tube, a rear end fin tube, a first three-way valve, a second three-way valve, a water bath heater, a liquid inlet pipe and a gas outlet pipe, wherein the first three-way valve is connected to the inlet of the first fin tube, the inlet of the second fin tube and the liquid inlet pipe, the heating inlet of the water bath heater is connected to the liquid inlet pipe, the second three-way valve is connected to the inlet of the first fin tube, the inlet of the second fin tube and the heating outlet of the water bath heater, the outlets of the first fin tube and the second fin tube are both connected to the inlet of the rear end fin tube, and the outlet of the rear end fin tube is connected to the gas outlet pipe.

[0009] Optionally, a first check valve is provided between the outlet of the first fin tube and the inlet of the rear end fin tube, and a second check valve is provided between the outlet of the second fin tube and the inlet of the rear end fin tube.

[0010] Optionally, a first temperature measuring point is provided at the outlet of the first fin tube, and a second temperature measuring point is provided at the outlet of the second fin tube.

[0011] Optionally, the water bath heater comprises a water bath box, in which a heat exchange tube bundle is arranged, a heating inlet of the heat exchange tube bundle is connected to the liquid inlet pipe, and a heating outlet of the heat exchange tube bundle is connected to the second three-way valve.

[0012] Optionally, the water bath is provided with an overflow pipe.

[0013] Optionally, a steam inlet is provided on the water bath.

[0014] Optionally, a third temperature measuring point is provided at the heating outlet of the water bath heater.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0017] The steam compound air-bath gasification device is provided with two parallel fin tube channels on the outside, so that the heat exchange performance is improved. When one side of the channel is gasified and frosted, the gas heated by water bath is switched to defrost the fin tube, while the other first fin tube works normally, thus solving the problem of reduced gasification heat exchange efficiency due to frosting in some pipe sections of the air-bath gasifier.

[0018] Compared with the steam water bath vaporizer, this device has lower requirements for steam demand and stability, lower energy consumption, and no need to add an additional independent steam water bath vaporizer, thus saving equipment investment. During the operation of the equipment, channels in different working states all play a gasification role, which improves the gasification efficiency and capacity, increases the outlet gas temperature, and can better meet the needs of large-volume gasification of liquids. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a steam compound air bath type gasification device proposed in an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of process control of a steam compound air bath type gasification device proposed in an embodiment of the utility model;

[0021] 1. First fin tube; 2. Second fin tube; 3. Rear fin tube; 5. First three-way valve; 7. Overflow pipe; 8. Steam inlet; 9. Second three-way valve; 10. Water bath heater; 11. Liquid inlet pipe; 12. Gas outlet pipe; 13. Heat exchange tube bundle; 14. First check valve; 15. Second check valve; 16. First temperature measuring point; 17. Second temperature measuring point; 18. Electric control box; 19. Heating air inlet valve; 20. Heating air outlet temperature measuring point; 21. Fixed structure. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and do not limit the protection scope of the utility model.

[0023] It should be noted that when an element is referred to as being "fixed to", "disposed on", "fixed on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. Further, when an element is considered to be "fixedly connected to" another element, the two may be fixed in a detachable connection manner or in a non-detachable connection manner, such as socketing, snap-on, one-piece fixation, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] The “first” and “second” involved in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0026] Combined with Figure 1 and 2A steam compound air bath type gasification device of the present embodiment comprises a first fin tube 1, a second fin tube 2 and a rear end fin tube 3, the outlet of the first fin tube 1 is connected to a first check valve 14, the first check valve 14 is connected to an inlet of the rear end fin tube 3, the outlet of the second fin tube 2 is connected to a second check valve 15, the second check valve 15 is connected to the inlet of the rear end fin tube 3, the outlet of the rear end fin tube 3 is connected to a gas outlet pipe 12, the inlet of the first fin tube 1 and the inlet of the second fin tube 2 are connected to a first three-way valve 5, the first three-way valve 5 is connected to a liquid inlet pipe 11, and the liquid inlet pipe 11 is connected to a water bath heater 10. The heating inlet is connected, and the water bath heater 10 includes a water bath box, in which a heat exchange tube bundle 13 is arranged, one end of the heat exchange tube bundle 13 is a heating inlet and is connected to a liquid inlet pipe 11, and a heating air inlet valve 19 is arranged on the connecting section for controlling the flow rate, and the other end is a heating outlet and is connected to a second three-way valve 9, and a heating outlet temperature measuring point 20 is arranged at the heating outlet 6, and the second three-way valve 9 is respectively connected to the first fin tube 1 and the second fin tube 2, and a first temperature measuring point 16 is arranged at the outlet of the first fin tube 1, and a second temperature measuring point 17 is arranged at the outlet of the second fin tube 2, and a third temperature measuring point 20 is arranged at the heating outlet of the water bath heater 10.

[0027] When liquefied gas enters the device from the liquid inlet pipe 11, it is divided into two paths, one to the first three-way valve 5 and the other to the heating air inlet valve 19. The gas enters the heat exchange tube bundle 13 inside the water bath heater 10 from the heating inlet, and indirectly exchanges heat with the steam-heated water. It flows out from the heating outlet and enters the second three-way valve 9, and flows to the liquid of the first three-way valve 5. The electric control box controls the first three-way valve 5, and the liquid after the valve enters the first fin tube 1. At this time, the second three-way valve 9 is controlled to switch the outlet gas to the second fin tube 2 for heating and defrosting. The outlet gas of the first fin tube 1 and the second fin tube 2 both enters the rear end fin tube 3 to continue mixing and heat exchange, and finally flows out from the gas outlet pipe 12 to complete gasification. When the gasification is in progress, the heat exchange efficiency of the first fin tube 1 is very high. The first temperature measuring point 16 can feedback the corresponding changes. When a certain temperature is reached, the first three-way valve 5 is controlled to switch, and the liquefied gas enters the second fin tube 2. At the same time, the heating gas outlet three-way valve 9 is switched, and the heated gas enters the first fin tube 1, which is heated and defrosted to improve the heat exchange efficiency. The third temperature measuring point 20 arranged on the heating outlet is interlocked with the heating air inlet valve 19. When the outlet gas temperature is lowered, the heating air inlet valve 19 is adjusted to reduce the amount of gas entering the water bath heater 10. When the heat exchange efficiency of the second fin tube 2 is reduced, the second temperature measuring point 17 feedbacks information, the second three-way valve 9 and the first three-way valve 5 are switched cyclically, and the above-mentioned heating and defrosting process is repeated. This is repeated to achieve high efficiency, energy saving and stable gasification.

[0028] As an optional solution of the utility model, the first fin tube 1, the second fin tube 2 and the rear end fin tube 3 are connected to the water bath heater 10 through a fixed structure 21, and the fixed structure 21 is a supporting structure such as a column, so that the first fin tube 1, the second fin tube 2 and the rear end fin tube 3 are connected to the water bath heater 10 as a whole.

[0029] As an optional solution of the present invention, an overflow pipe 7 is provided on the water bath, and the overflow pipe 7 is installed on one side of the upper end of the water bath.

[0030] As an optional solution of the utility model, a steam inlet 8 is provided on the water bath, and the steam inlet 8 is used to add heat to the water bath to ensure the water bath heating effect. In this embodiment, the steam inlet 8 is arranged adjacent to the overflow pipe 7.

[0031] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A steam-compound air-bath type gasification device, characterized in that: It includes a first fin tube, a second fin tube, a rear end fin tube, a first three-way valve, a second three-way valve, a water bath heater, a liquid inlet pipe and a gas outlet pipe, wherein the first three-way valve is connected to the inlet of the first fin tube, the inlet of the second fin tube and the liquid inlet pipe, the heating inlet of the water bath heater is connected to the liquid inlet pipe, the second three-way valve is connected to the inlet of the first fin tube, the inlet of the second fin tube and the heating outlet of the water bath heater, the outlets of the first fin tube and the second fin tube are both connected to the inlet of the rear end fin tube, and the outlet of the rear end fin tube is connected to the gas outlet pipe.

2. The steam-compound air-bath type gasification device according to claim 1, characterized in that: A first check valve is provided between the outlet of the first fin tube and the inlet of the rear end fin tube, and a second check valve is provided between the outlet of the second fin tube and the inlet of the rear end fin tube.

3. The steam-compound air-bath type gasification device according to claim 1, characterized in that: A first temperature measuring point is provided at the outlet of the first fin tube, and a second temperature measuring point is provided at the outlet of the second fin tube.

4. A steam-compound air-bath type gasification device according to any one of claims 1 to 3, characterized in that: The water bath heater comprises a water bath box, in which a heat exchange tube bundle is arranged, a heating inlet of the heat exchange tube bundle is connected to the liquid inlet pipe, and a heating outlet of the heat exchange tube bundle is connected to the second three-way valve.

5. The steam-compound air-bath type gasification device according to claim 4, characterized in that: An overflow pipe is provided on the water bath.

6. The steam-compound air-bath type gasification device according to claim 4, characterized in that: The water bath is provided with a steam inlet.

7. A steam-compound air-bath type gasification device according to any one of claims 1 to 3, characterized in that: The heating outlet of the water bath heater is provided with a third temperature measuring point.

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