Hydrate reactor and system using the same

Abstract

The present invention discloses a hydrate reactor and a system using the reactor, the reactor comprising: a cylinder, which is a vertical pressure vessel structure, a gas-liquid mixed feed port is provided at the lower part of the cylinder, a hydrate discharge port is provided at the upper part of the cylinder, and a liquid discharge port is provided at the bottom of the cylinder; a honeycomb component is arranged in the middle part of the cylinder, the honeycomb component comprises a plurality of six-sided honeycomb channels with inclined walls, and in the process of the gas-liquid mixture passing through the honeycomb channels and generating hydrates, the inclined walls of the honeycomb channels conduct and dissipate the hydration heat. By arranging the honeycomb component in the reactor, the contact time of gas and liquid can be effectively increased, which is more conducive to the rapid conduction of the heat of hydrate formation, thereby improving the hydrate formation efficiency. The present invention arranges the honeycomb component in the reactor, which can effectively increase the contact time of gas and liquid, which is more conducive to the rapid conduction of the heat of hydrate formation, thereby improving the hydrate formation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrate preparation, and in particular to a hydrate reactor and a system using the reactor. Background Art

[0002] Hydrate is a cage-shaped crystal inclusion compound. Water molecules are combined by hydrogen bonds to form cage-shaped crystals, and gas molecules are enclosed in the crystal lattice. Carbon dioxide hydrate is a special inclusion compound formed by water and carbon dioxide under conditions of lower temperature and higher pressure. Each cubic meter of carbon dioxide hydrate can store 160 to 180 cubic meters of carbon dioxide gas. Natural gas hydrate is an ice-like substance formed when methane molecules are wrapped by water molecules, also known as combustible ice. At 0°C, only 30 atmospheres of pressure are needed to generate it. Under standard conditions, the decomposition of one unit volume of natural gas hydrate can produce up to 164 units of methane gas, making it an important potential future resource.

[0003] Hydrates have a wide range of applications, but the reaction conditions require low temperature and high pressure. Therefore, overcoming the slow formation of hydrates and increasing their formation rate are the keys to the successful application of hydrate technology. At present, the most common methods for promoting the rapid formation of hydrates in laboratories can be divided into physical methods and chemical methods. In the process of various gas hydrate formation, physical enhancement methods are the dominant promotion methods, and spraying is a method of physical enhancement methods with high reliability, strong controllability, good effect, and low energy consumption. However, the biggest disadvantage of the spraying method is that a hydrate layer is formed on the surface of the droplets during the falling process, and the heat of formation accumulates inside the droplets, inhibiting the further formation of hydrates. The hydrate reactor commonly used in the prior art forms a spray after the gas and liquid are mixed, and a metal plate is placed opposite the nozzle to transfer and diffuse the heat of formation. However, from the experimental results, the cooling effect of this method is not obvious, and the liquid drips quickly from the baffle, which makes the gas-liquid contact time short and the hydrate formation rate slow.

[0004] Chinese patent application CN104445197A discloses a carbon dioxide hydrate preparation device, which includes a reaction unit, a liquid circulation unit, an air intake unit, a rupture unit and a heat exchange unit. The liquid circulation unit is connected to the liquid inlet at the top and the liquid outlet at the bottom of the reaction unit respectively, the air intake unit is connected to the air inlet on the reaction unit, the rupture unit and the heat exchange unit are located inside the reaction unit, and the heat exchange unit is a coil heat exchanger. A rupture unit composed of a metal mesh is added above the heat exchange unit, so that the droplets collide with the metal mesh during the falling process and split into smaller droplets, and flow through the gaps in the metal mesh to the coil heat exchanger with a larger heat exchange area, which is more conducive to the effective release of the heat of formation inside the carbon dioxide hydrate and is taken away by the heat exchange unit, so that the subsequent reaction steps can be carried out more smoothly. However, this spraying method has a poor effect on gas-liquid mixing, and the release of the heat of formation mainly depends on the heat exchange unit, which increases the volume of the device.

[0005] Therefore, there is an urgent need for a hydrate reactor and a system using the reactor to overcome the problems of short gas-liquid contact time and slow heat conduction of hydrate formation in the prior art.

[0006] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] The object of the present invention is to provide a hydrate reactor and a system using the reactor. By arranging a honeycomb component in the reactor, the contact time between gas and liquid can be effectively increased, which is more conducive to the rapid conduction of hydrate formation heat, thereby improving the hydrate formation efficiency.

[0008] Another object of the present invention is to provide a hydrate reaction system, which can realize the switching of the heat exchange circuit and the flushing circuit after a period of hydration reaction, and flush the honeycomb components in the reactor through the liquid discharged from the bottom of the hydrate reactor.

[0009] To achieve the above-mentioned purpose, according to the first aspect of the present invention, there is provided a hydrate reactor, comprising: a cylinder, which is a vertical pressure vessel structure, a gas-liquid mixed feed inlet is provided at the lower part of the cylinder, a hydrate discharge outlet is provided at the upper part of the cylinder, and a liquid discharge outlet is provided at the bottom of the cylinder; a honeycomb component is arranged in the middle part of the cylinder, and the honeycomb component comprises a plurality of six-sided honeycomb channels with inclined walls, and in the process of the gas-liquid mixture passing through the honeycomb channels and generating hydrates, the inclined walls of the honeycomb channels conduct and dissipate the hydration heat.

[0010] Furthermore, in the above technical solution, the honeycomb component may include a plurality of honeycomb panels spaced from bottom to top, and each honeycomb panel is provided with the six-sided honeycomb channels.

[0011] Furthermore, in the above technical solution, the inclination directions of the honeycomb channel walls on two adjacent levels of the multi-level honeycomb panel are different, so as to form a zigzag flow direction of the gas-liquid mixture.

[0012] Furthermore, in the above technical solution, the multi-level honeycomb panel may include a primary honeycomb panel, a secondary honeycomb panel and a tertiary honeycomb panel arranged in sequence from bottom to top; the thickness of the honeycomb panel and the aperture of the honeycomb pores on the honeycomb panel increase step by step; and the inclination angle of the honeycomb pore wall decreases step by step.

[0013] Furthermore, in the above technical solution, the thickness of the primary honeycomb panel can be set to 5 to 10 cm; the inclination angle of the primary honeycomb channel wall can be set to 10° to 45°.

[0014] Furthermore, in the above technical solution, the hydrate reactor may also include: a pneumatic rotary ejector, which is arranged between the gas-liquid mixed feed port and the honeycomb assembly; the pneumatic rotary ejector is a combined structure of an impeller and a orifice plate, the impeller is driven to rotate by the gas pressure in the gas-liquid mixed feed, and the gas is spirally cut into small bubbles and formed into a jet through the orifice plate.

[0015] Furthermore, in the above technical solution, a liquid jet inlet may be provided above the honeycomb assembly. After a period of hydration reaction, the liquid jet is used to receive the pumped discharge from the bottom of the cylinder and flush the honeycomb assembly.

[0016] According to a second aspect of the present invention, the present invention provides a hydrate reaction system, comprising a hydrate reactor as described in any one of the foregoing, and further comprising: a drainage recoil unit, which pressurizes the drainage from the bottom of the hydrate reactor cylinder and pumps it to a buffer pipe, and then sprays the drainage to the honeycomb component in the cylinder through a liquid jet, so as to flush the honeycomb component after a period of hydration reaction.

[0017] Furthermore, in the above technical solution, the system also includes: a gas supply unit, which is used to provide the high-pressure gas source required for the hydration reaction; a liquid supply unit, which is used to provide a cooling water source and a hydrate promoter at the initial stage of the hydration reaction; and a gas-liquid mixing unit, which receives the high-pressure gas source, the cooling water source and the hydrate promoter, mixes them, and then sends them to the feed port of the hydrate reactor.

[0018] Furthermore, in the above technical solution, the liquid supply unit includes: a low-temperature constant temperature box, which is used to provide a circulating refrigerant for cooling the water source and the hydrate promoter; a heat exchanger, which is used to exchange heat between the refrigerant and the water source and the hydrate promoter to obtain the cooling liquid required for the hydration reaction.

[0019] Furthermore, in the above technical solution, the liquid circulation pump used in the drainage and recoil unit can selectively drive two circulation loops, which are a heat exchange circuit and a flushing circuit; wherein the heat exchange circuit is a circulation loop between the drainage port and the feed port of the cylinder, and the flushing circuit is a circulation loop between the drainage port and the inlet of the liquid flow injector.

[0020] Furthermore, in the above technical solution, the system may also include: a gas circulation pump, which is used to pump the gas after the hydration reaction from the gas outlet at the top of the hydrate reactor cylinder back to the gas supply line for gas circulation.

[0021] Furthermore, in the above technical solution, a safety valve and a pressure sensor are provided at the gas outlet to maintain the required high pressure environment in the hydrate reactor.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) The present invention conducts hydration heat through the honeycomb channels of the honeycomb component. The heat imbalance of the six-sided structure of the honeycomb channels allows the hydration heat generated on one surface to be conducted to the other four surfaces, gradually dispersing and transferring the heat. Therefore, relative to the same amount of heat, the heat exchange area with the liquid is increased, while the heat exchange per unit area per unit time is reduced, thereby improving the heat exchange efficiency;

[0024] 2) The present invention adopts a three-level honeycomb panel design, especially adopts a scheme in which the thickness of the honeycomb panel and the aperture of the honeycomb channel on the honeycomb panel are gradually increased and the inclination angle of the honeycomb channel wall is gradually decreased, so that the overall structure of the honeycomb component presents a three-level variable angle broken line shape. With such a structure, the gas in the feed first impacts the inclined wall of the first-level honeycomb panel to form a crystal nucleus, and under the impact of the gas, the small crystal nucleus is driven to collide with the inclined walls of the second-level honeycomb panel and the third-level honeycomb panel respectively and continue to climb. The contact time between the gas and liquid phases is increased by the gradually extended wall surface, so that the crystal has more sufficient growth time; the gradually increasing honeycomb inner diameter and the gradually decreasing angle with the vertical direction are conducive to the passage of the crystal, which can effectively prevent the grown crystals from blocking the channel;

[0025] 3) The pneumatic rotary ejector of the present invention uses gas pressure to drive the impeller, thereby increasing the spiral force of the gas, and then ejecting the gas in the form of small bubbles through the dispersed nozzles. Since the more intense the gas-liquid disturbance is during the hydration reaction, the faster the rate of hydrate formation is. The increase in the gas-liquid mass transfer rate can effectively shorten the induction time of the crystal nucleus; hydrate nucleation mainly occurs at the gas-liquid interface, and the high gas concentration at the interface is used to form a favorable area for gas pre-concentration. By combining the pneumatic rotary ejector of the present invention with the honeycomb assembly, the nucleation rate of hydrates can be increased by increasing the disturbance and instantaneous gas concentration, thereby further promoting the formation of hydrates. The inclined inner wall of the multi-stage honeycomb plate causes the ejected gas to form a block in this area, and the instantaneous concentration increases, which is beneficial to the nucleation of hydrates;

[0026] 4) The hydrate reaction system of the present invention can effectively flush the honeycomb component through the flushing circuit formed by the liquid discharge recoil unit; by setting the buffer tube in the liquid discharge recoil unit, the liquid can be temporarily stored to reduce the liquid level in the hydrate reactor. After the hydrate reacts for a certain period of time, the valve on the heat exchange circuit is closed, and the valve on the flushing circuit is opened to allow the liquid to enter the flushing circuit. At this time, due to the discharge of the liquid in the reactor cylinder, the internal pressure is reduced, and because the liquid is pressurized and sprayed, the temperature will be slightly increased. The liquid sprayed onto the honeycomb component will cause the hydrate attached to its surface to fall off and break in the opposite direction, thereby effectively improving the flushing efficiency and effect.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, and to make the above and other purposes, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a connection schematic diagram of the hydrate reaction system of the present invention.

[0029] Figure 2-A It is a schematic diagram of the appearance of the hydrate reactor of the present invention.

[0030] Figure 2-B It is a cross-sectional schematic diagram of the hydrate reactor of the present invention.

[0031] Figure 3-A The figure is a schematic cross-sectional view of the inlet end face of a primary honeycomb panel in the honeycomb assembly of the present invention.

[0032] Figure 3-B It is a schematic cross-sectional view of the inlet end face of the secondary honeycomb panel in the honeycomb assembly of the present invention.

[0033] Figure 3-C The figure is a schematic cross-sectional view of the inlet end face of the three-stage honeycomb panel in the honeycomb assembly of the present invention.

[0034] Figure 4 It is a partial three-dimensional schematic diagram of the honeycomb component of the present invention.

[0035] Figure 5-A It is a three-dimensional appearance diagram of the pneumatic rotary ejector of the present invention.

[0036] Figure 5-B It is a schematic internal cross-sectional view of the pneumatic rotary ejector of the present invention.

[0037] Description of main reference numerals:

[0038] 1-hydrate reactor, 100-barrel, 101-feed port, 102-hydrate discharge port, 103-liquid discharge port, 104-injector docking port, 105-gas discharge port, 106-safety valve and pressure sensor, 110-honeycomb assembly, 111-primary honeycomb plate, 1111-primary honeycomb channel, 1112-primary honeycomb channel wall, 112-secondary honeycomb plate, 1121-secondary honeycomb channel, 1122-secondary honeycomb channel wall, 113-third-level honeycomb plate, 1131-third-level honeycomb channel, 1132-third-level honeycomb channel wall, 120-pneumatic rotary injector, 121-impeller, 122-spray hole, 123-feed pipe;

[0039] 2-gas source, 3-gas-liquid mixing unit, 4-heat exchanger, 5-liquid circulation pump, 6-liquid flow ejector, 7-hydrate slurry tank, 8-liquid outlet valve, 9-flushing line valve, 10-heat exchange line valve, 11-first gas valve, 12-water pump, 13-outlet flow valve, 14-low temperature constant temperature box, 15-second gas valve, 16-gas circulation pump, 17-third gas valve, 18-buffer pipe, 19-water storage tank. DETAILED DESCRIPTION

[0040] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0041] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0042] In this document, for the convenience of description, spatial relative terms such as "below", "below", "down", "above", "above", "upper", etc. may be used to describe the relationship between one element or feature and another element or feature in the accompanying drawings. It should be understood that the spatial relative terms are intended to include different orientations of the object in use or operation in addition to the orientation depicted in the figure. For example, if the object in the figure is turned over, the element described as being "below" or "below" other elements or features will be oriented "above" the element or feature. Therefore, the exemplary term "below" can include both below and above. Objects may also have other orientations (rotated 90 degrees or other orientations) and the spatial relative terms used in this document should be interpreted accordingly.

[0043] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit a specific position or relative relationship. In other words, in some embodiments, the terms "first", "second", etc. can also be interchangeable.

[0044] Example 1

[0045] like Figure 2-A and 2-B As shown, this embodiment provides a hydrate reactor 1 for preparing hydrates of single-component gas or mixed-component gas. The hydrate reactor 1 comprises at least a cylinder 100 and a honeycomb assembly 110. The cylinder 100 is a vertical pressure vessel structure, and a gas-liquid mixed feed inlet 101 is provided at the lower part of the cylinder. A hydrate discharge port 102 is provided at the upper part of the cylinder, and the hydrate discharge port 102 is inclined downward by 5° to 15° in the horizontal direction, and is connected to an external pipeline through a neck butt-welded flange to facilitate the prepared hydrate to be discharged into the hydrate slurry tank 7 (see Figure 1 ). A drain port 103 is provided at the bottom of the cylinder, which is connected to an external pipeline through a neck butt-welded flange. A gas outlet 105 is also provided at the top of the cylinder of this embodiment, and a safety valve and a pressure sensor 106 are provided at the gas outlet 105, and the safety valve is sealed and connected by a neck butt-welded flange. The honeycomb assembly 110 is arranged in the middle of the cylinder 100 and can be welded as a whole in the cylinder. The honeycomb assembly 110 includes a plurality of six-sided honeycomb channels with inclined walls. When the gas-liquid mixture passes through the honeycomb channels and generates hydrates, the inclined walls of the honeycomb channels conduct and dissipate the hydration heat.

[0046] The present invention can effectively improve the extraction of hydration heat generated by the reaction by setting the honeycomb assembly 110 in the cylinder 100. The inventor has found through research that heat conduction through the side wall of the honeycomb structure and radiation heat exchange between the inner surfaces of the honeycomb are the main ways of heat transfer in the honeycomb. The inventor has further experimentally verified that the six-sided structure of the honeycomb has a larger contact area between metal and gas per unit space than the traditional baffle, thereby effectively dispersing the hydration heat per unit area; each face of the honeycomb is connected to the other four faces, and due to the honeycomb channels with inclined walls, the six faces are exposed to different amounts of heat, so the imbalance of heat causes the hydration heat generated on one face to be conducted to the other four faces, gradually dispersing and transferring the heat, so relative to the same amount of heat, its heat exchange area with the liquid is increased, while the heat exchange per unit area per unit time is reduced, which can improve the heat exchange efficiency.

[0047] Further Figure 2-B As shown, preferably but not restrictively, the honeycomb assembly of this embodiment includes a multi-level honeycomb panel spaced from bottom to top, and each level of honeycomb panel is provided with the six-sided honeycomb channels. The inclination direction of the honeycomb channel wall surfaces on two adjacent levels of honeycomb panels of the multi-level honeycomb panel is different (refer to Figure 4 ), used to form a broken line flow direction of the gas-liquid mixture. Further, the multi-stage honeycomb panel of this embodiment can be divided into three levels, including a primary honeycomb panel 111, a secondary honeycomb panel 112, and a tertiary honeycomb panel 113 arranged sequentially from bottom to top. Preferably, but not restrictively, the thickness of the honeycomb panel and the aperture of the honeycomb pores on the honeycomb panel increase step by step (refer to Figure 2-B as well as Figures 3-A to 3-C ); and the inclination angle of the honeycomb channel wall decreases step by step (reference Figure 4 ). Specifically, the thickness of the primary honeycomb panel can be selected to be 5 to 10 cm; the inclination angle of the primary honeycomb channel wall can be selected to be 10° to 45°.

[0048] The gas-liquid mixture of this embodiment enters from the feed port 101 at the bottom. During the hydration reaction, the liquid (i.e., the cooling water source and the hydrate promoter) has fully entered the cylinder and immersed the honeycomb assembly 110. After the hydration reaction occurs, the hydrate floats above the liquid surface and is discharged through the hydrate discharge port 102. At the same time, the feed port 101 at the lower part of the cylinder continuously enters the gas-liquid mixture to form a continuous preparation of hydrates. Through the three-stage honeycomb panel design of this embodiment, in particular, the thickness of the honeycomb panel, the aperture of the honeycomb pores on the honeycomb panel are gradually increased, and the inclination angle of the honeycomb pore wall is gradually decreased, so that the overall structure of the honeycomb assembly presents a three-stage variable angle broken line shape. With such a structure, the gas in the feed first impacts the inclined wall of the first honeycomb panel 111 to form a crystal nucleus, and under the impact of the gas, the small crystal nucleus is driven to collide with the inclined wall of the second honeycomb panel 112 and the third honeycomb panel 113 respectively and continue to climb. The contact time of the gas-liquid two phases is increased by the gradually extended wall, so that the crystal has more sufficient growth time. The gradually increasing honeycomb inner diameter and the gradually decreasing angle with the vertical direction are conducive to the passage of crystals and can effectively prevent the grown crystals from clogging the pores.

[0049] Further Figure 2-B as well as Figure 5-A , 5-B As shown, preferably but not limiting, the hydrate reactor of this embodiment may further include a pneumatic rotary ejector 120, which is arranged between the gas-liquid mixed feed port 101 and the honeycomb assembly 110. The pneumatic rotary ejector 120 is a cylindrical hollow structure as a whole, which is a combination structure of an impeller and a perforated plate. The impeller 121 is arranged inside the shell, and the pneumatic rotary ejector 120 faces Figure 2-B The upper side is a perforated plate with dispersed spray holes 122, and a feed pipe 123 is connected to the feed port 101 of the barrel 100. The impeller 121 is driven to rotate by the gas pressure in the gas-liquid mixed feed, and the gas is spirally cut into small bubbles and sprayed through the perforated plate.

[0050] The pneumatic rotary ejector of this embodiment uses gas pressure to push the impeller, increasing the spiral force of the gas, and then ejecting the gas in the form of small bubbles through dispersed nozzles. Since the more intense the gas-liquid disturbance is in the hydration reaction, the faster the rate of hydrate formation is. The increase in the gas-liquid mass transfer rate can effectively shorten the induction time of the crystal nucleus. Therefore, on the basis of the honeycomb assembly of this embodiment, the use of a pneumatic rotary ejector can increase the nucleation rate of hydrates by increasing the disturbance and instantaneous gas concentration, thereby further promoting the formation of hydrates. Hydrate nucleation mainly occurs at the gas-liquid interface. The high gas concentration at the interface is used to form a favorable area for gas pre-concentration. The inclined inner wall of the multi-stage honeycomb panel causes the ejected gas to form a blockage in this area, and the instantaneous concentration increases, which is conducive to the nucleation of hydrates.

[0051] Further Figure 2-A , 2-B As shown, a liquid jet inlet 104 can be provided on the side wall of the cylinder 100 and above the honeycomb assembly 110. After a period of hydration reaction, the liquid jet 6 (refer to Figure 1 ) is used to receive the pumped liquid from the bottom of the cylinder and flush the honeycomb assembly 110. As the liquid discharged from the bottom passes through the work of the booster pump (i.e., liquid circulation pump 5) and the liquid jet 6, the temperature will be slightly increased. Under the action of pressure, temperature increase and jet force, the hydrate attached to the surface of the honeycomb assembly 110 can be reversely detached and broken, forming a cleaning effect.

[0052] Example 2

[0053] like Figure 1 As shown, this embodiment provides a hydrate reaction system, which includes the hydrate reactor in Example 1, and also includes a drainage recoil unit, and the drainage recoil unit includes: a liquid outlet valve 8, a liquid circulation pump 5, a flushing line valve 9, a buffer pipe 18 and a liquid flow injector 6. These devices and pipelines form a circulation loop (i.e., a flushing line) with the reactor 1 cylinder. The drainage recoil unit pressurizes the drainage from the bottom of the hydrate reactor cylinder and pumps it to the buffer pipe 18, and then injects the drainage into the honeycomb assembly in the cylinder through the liquid flow injector 6, so as to flush the honeycomb assembly after a period of hydration reaction. Specifically, refer to Figure 1 , the liquid circulation pump 5 is connected to the bottom discharge port 103 of the hydrate reactor through the liquid outlet valve 8. The two ends of the buffer pipe 18 are respectively connected to the inlet of the liquid flow ejector 6 and the outlet of the liquid circulation pump 5, and a flushing line valve 9 is provided at the outlet of the liquid circulation pump. The diameter of the buffer pipe 18 can be set to 35-45 cm, and the water inlet and outlet at both ends have the same diameter, which can be used to temporarily store liquid to reduce the liquid level in the hydrate reactor 1. The outlet of the liquid flow ejector 6 is connected to the ejector docking port 104 on the side of the hydrate reactor (refer to Figure 2-A ), through the flushing line formed by the liquid drainage backwashing unit in this embodiment, the honeycomb components in the hydrate reactor can be flushed while reducing the pressure of the hydrate reactor.

[0054] Further Figure 1As shown, the system of this embodiment also includes a gas supply unit, a liquid supply unit and a gas-liquid mixing unit. Among them, the gas supply unit includes a gas source 2 and a first gas valve 11, which are used to provide a high-pressure gas source required for the hydration reaction. The gas source 2 is connected to the gas inlet of the gas-liquid mixing unit 3 through the first gas valve 11 and the pipeline to provide a gas of a certain concentration and pressure for the hydrate reactor of the present invention. The liquid supply unit includes a water storage tank 19, a water pump 12 and an outlet flow valve 13, which are used to provide a cooling water source and a hydrate promoter in the early stage of the hydration reaction. The gas-liquid mixing unit has a gas-liquid mixing chamber, and the liquid pressurized by the water pump 12 (i.e., the cooling water source and the hydrate promoter) enters the mixing chamber together with the gas to mix and is sprayed into the feed port of the hydration reactor cylinder at a high speed.

[0055] Further Figure 1 As shown, the liquid supply unit further includes a low-temperature thermostat 14 and a heat exchanger 4. Among them, the low-temperature thermostat 14 is used to provide a circulating refrigerant for cooling the water source and the hydrate promoter. The heat exchanger 4 is used to perform heat exchange between the refrigerant and the water source and the hydrate promoter to obtain the cooling liquid required for the hydration reaction. Specifically, the hot material circuit in the heat exchanger is connected to the bottom discharge port of the hydrate reactor and the liquid inlet of the gas-liquid mixing unit 3, and the cold material circuit is connected to the low-temperature thermostat 14, and the liquid in the pipeline is cooled by the circulating refrigerant. Another circulation loop (i.e., a heat exchange circuit) is formed between the discharge port and the feed port of the hydrate reactor of this embodiment. The two circulation loops formed by the heat exchange circuit and the aforementioned flushing circuit are driven by the same liquid circulation pump, and a certain circulation loop can be selectively started through the corresponding valve, that is, during the normal hydration reaction, the heat exchange circuit valve 10 is opened, and when the honeycomb component needs to be cleaned, the flushing circuit valve 9 is opened.

[0056] Further Figure 1 As shown, the system of this embodiment also includes a gas circulation pump 16, which is used to pump the gas after the hydration reaction from the gas outlet at the top of the hydrate reactor cylinder back to the gas supply line. A second gas valve 15 and a third gas valve 17 are respectively provided on the lines at both ends of the gas circulation pump 16 to control the circulation of the gas.

[0057] The system of this embodiment can effectively flush the honeycomb component through the flushing circuit formed by the liquid discharge recoil unit. By setting the buffer tube in the liquid discharge recoil unit, the liquid can be temporarily stored to reduce the liquid level in the hydrate reactor. After the hydrate reacts for a certain period of time, the valve on the heat exchange circuit is closed, and the valve on the flushing circuit is opened to allow the liquid to enter the flushing circuit. At this time, due to the discharge of the liquid in the reactor cylinder, the internal pressure is reduced, and because the liquid is pressurized and sprayed, the temperature will be slightly increased. The liquid sprayed onto the honeycomb component will cause the hydrate attached to its surface to fall off and break in the opposite direction, thereby effectively improving the flushing efficiency and effect.

[0058] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments should fall within the scope of protection of the present invention.

Claims

1. A hydrate reactor, characterized in that: include: The cylinder is a vertical pressure vessel structure, with a gas-liquid mixed feed inlet at the bottom of the cylinder, a hydrate discharge outlet at the top of the cylinder, and a liquid discharge outlet at the bottom of the cylinder; A honeycomb component is arranged in the middle of the cylinder, and comprises a plurality of six-sided honeycomb channels with inclined walls. In the process of gas-liquid mixture passing through the honeycomb channels and generating hydrates, the inclined walls of the honeycomb channels conduct and dissipate hydration heat; the honeycomb component comprises a multi-level honeycomb plate arranged at intervals from bottom to top, and each level of honeycomb plate is provided with the six-sided honeycomb channels; the inclination directions of the walls of the honeycomb channels on two adjacent levels of the multi-level honeycomb plate are different, so as to form a broken line flow direction of the gas-liquid mixture; the thickness of the honeycomb plate and the aperture of the honeycomb channels on the honeycomb plate increase step by step; and the inclination angle of the walls of the honeycomb channels decreases step by step.

2. The hydrate reactor according to claim 1, characterized in that: The multi-level honeycomb panel includes a primary honeycomb panel, a secondary honeycomb panel and a tertiary honeycomb panel which are arranged in sequence from bottom to top.

3. The hydrate reactor according to claim 2, characterized in that: The thickness of the primary honeycomb plate is 5 to 10 cm; the inclination angle of the primary honeycomb channel wall is 10° to 45°.

4. The hydrate reactor according to claim 1, characterized in that: The hydrate reactor further comprises: A pneumatic rotary ejector is arranged between the gas-liquid mixed feed port and the honeycomb component; the pneumatic rotary ejector is a combined structure of an impeller and a perforated plate, wherein the impeller is driven to rotate by the gas pressure in the gas-liquid mixed feed, and the gas is spirally cut into small bubbles and formed into a jet through the perforated plate.

5. The hydrate reactor according to claim 1, characterized in that: A liquid jet inlet is arranged on the side wall of the cylinder and above the honeycomb assembly. After a period of hydration reaction, the liquid jet is used to receive the pumped discharge from the bottom of the cylinder and flush the honeycomb assembly.

6. A hydrate reaction system, characterized in that: The hydrate reactor according to any one of claims 1 to 5, further comprising: The drainage recoil unit pressurizes the drainage from the bottom of the hydrate reactor cylinder and pumps it to the buffer pipe, and then sprays the drainage to the honeycomb component in the cylinder through a liquid jet, so as to flush the honeycomb component after a period of hydration reaction.

7. The hydrate reaction system according to claim 6, characterized in that: The system further comprises: A gas supply unit, which is used to provide a high-pressure gas source required for the hydration reaction; A liquid supply unit, which is used to provide a cooling water source and a hydrate promoter at the initial stage of the hydration reaction; A gas-liquid mixing unit receives the high-pressure gas source, the cooling water source and the hydrate promoter, mixes them and then sends them to the feed port of the hydrate reactor.

8. The hydrate reaction system according to claim 7, characterized in that: The liquid supply unit comprises: A low temperature thermostat, which is used to provide circulating refrigerant for cooling the water source and the hydrate promoter; The heat exchanger is used to perform heat exchange between the refrigerant, the water source and the hydrate promoter to obtain the cooling liquid required for the hydration reaction.

9. The hydrate reaction system according to claim 6, characterized in that: The liquid circulation pump used in the drainage recoil unit selectively drives two circulation loops, which are a heat exchange circuit and a flushing circuit. The heat exchange circuit is a circulation circuit between the drainage port and the feed port of the cylinder, and the flushing circuit is a circulation circuit between the drainage port and the inlet of the liquid jet injector.

10. The hydrate reaction system according to claim 6, characterized in that: The system further comprises: A gas circulation pump is used to pump the gas after hydration reaction from the gas outlet at the top of the hydrate reactor cylinder back to the gas supply line for gas circulation.

11. The hydrate reaction system according to claim 10, characterized in that: A safety valve and a pressure sensor are provided at the gas outlet to maintain the required high pressure environment in the hydrate reactor.

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