A hydrogen production device based on methanol steam reforming in a pressurized water reactor environment

Abstract

The invention discloses a hydrogen production device based on methanol steam reforming in a pressurized water reactor environment, which belongs to the technical field of hydrogen production technology. A steam-water separator is added to realize water circulation and methanol stock liquid circulation. A steam-liquid mixture input through a steam-liquid input pipe passes through the spiral blocking spiral part through the blocking spiral part in the steam-water separator, so that the liquid in the steam-liquid mixture adheres to the blocking spiral part and finally flows into a liquid collecting cylinder. The gas with the liquid removed flows to the next stage through the gas output cylinder. This structure disturbs the steam-liquid mixture by rotating the steam-water separation cylinder and the blocking spiral part. When the steam-liquid separation is impure, the blocking spiral part pushes the steam-liquid mixture toward the liquid collecting cylinder, reduces the flow speed of the steam-liquid mixture, and improves the separation efficiency. When the steam-liquid separation meets the standard, the steam-liquid separation is pushed toward the gas output cylinder through the blocking spiral part, the gas output speed is increased, and the output efficiency of high-temperature steam, hydrogen and carbon dioxide is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen production technology, and specifically relates to a hydrogen production device based on methanol steam reforming in a pressurized water reactor environment. Background Art

[0002] In a pressurized water reactor environment, methanol steam reforming hydrogen production technology is an effective method for hydrogen production. This technology uses methanol and water vapor to undergo a reforming reaction under the action of a catalyst to produce hydrogen and carbon dioxide. The methanol steam reforming reaction usually takes place in the temperature range of 200-300℃ and has a high hydrogen-to-carbon ratio, making it a potential method for hydrogen production.

[0003] However, in the prior art, both the high-temperature steam and the mixed gas produced by the methanol solution have portions that are not recycled, thereby reducing the efficiency of hydrogen production. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a hydrogen production device based on methanol steam reforming in a pressurized water reactor environment, which can improve the hydrogen production efficiency through a steam-water separator.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention comprises a primary circuit system, a secondary circuit system and a reforming hydrogen production system;

[0007] The primary loop system includes a coolant pump, a reactor, a pressurizer and a steam generator connected in sequence, the liquid output end of the steam generator is connected to the coolant pump, the coolant pump inputs the coolant into the reactor, and the reactor heats the water with the high-temperature coolant through the steam generator to generate high-temperature steam;

[0008] The secondary circuit system includes a steam-water separator and a condenser. The steam generator inputs high-temperature steam into the steam-water separator, the steam-water separator separates liquid and connects to the condenser, and the condenser inputs the cooled liquid into the steam generator again.

[0009] The reforming hydrogen production system comprises a methanol stock liquid tank and a solution tank. The methanol stock liquid tank transports methanol stock liquid to the solution tank. The gas-water separator of the secondary loop system inputs the separated high-temperature gas into the solution tank. Desalted water for mixing with methanol is added in the solution tank. The liquid output end of the solution tank is connected to the condenser of the secondary loop system. The gas output end of the solution tank is connected to the reforming converter, the condenser and the gas-water separator in sequence. The gas output end of the gas-water separator is connected to the hydrogen absorption tower and the carbon dioxide analysis tower in sequence. The liquid output end of the gas-water separator is connected to the solution tank.

[0010] Furthermore, the condensers in the secondary loop system and the reforming hydrogen production system are connected to the cooling tower via a circulating water pump.

[0011] Furthermore, the steam-water separators in the secondary circuit system and the reforming hydrogen production system both include a liquid collecting cylinder, a steam-water separation cylinder and a gas output cylinder. The upper end of the steam-water separation cylinder is coaxially rotatably connected to the gas output cylinder, and the lower end of the steam-water separation cylinder is coaxially rotatably connected to the liquid collecting cylinder. The liquid collecting cylinder is laterally connected to a steam-liquid input pipe, and the upper end of the gas output cylinder is connected to a gas output pipe. The inner side wall of the steam-water separation cylinder is provided with a spiral retaining spiral portion along the axis of the steam-water separation cylinder, and the outer side of the steam-water separation cylinder is coaxially fixed with a driven tooth. The rotational positions of the liquid collecting cylinder and the gas output cylinder are relatively fixed, and the gas output cylinder is fixedly connected to a motor, and the output end of the motor is provided with a driving tooth meshing with the driven tooth.

[0012] Furthermore, a plurality of V-shaped baffles are spirally distributed along the baffle spiral portion on one side of the baffle spiral portion facing the liquid collecting tube, and the concave surfaces of the V-shaped baffles face the conveying direction of the gas.

[0013] Furthermore, it also includes a recycling cylinder, the upper and lower ends of which are sealed with the liquid collecting cylinder and the gas output cylinder respectively, the steam-water separation cylinder is rotated and located inside the recycling cylinder, the spiral blades of the retaining spiral part extend from the side wall of the steam-water separation cylinder to form a spiral structure surrounding the outside of the steam-water separation cylinder, the lower end of the liquid collecting cylinder is connected to a connecting pipe, the middle section of the connecting pipe is provided with a water pump, the end of the connecting pipe is connected to the upper end of the recycling cylinder, the output port of the connecting pipe is located above the blades of the retaining spiral part exposed from the outside of the steam-water separation part, and the lower end of the recycling cylinder is connected to a liquid output pipe.

[0014] The beneficial effects of the present invention are:

[0015] The present invention

[0016] 1. The water and methanol raw liquid can be reused through the steam-water separator and condenser, saving the input of raw materials and improving the efficiency of hydrogen production.

[0017] 2. By setting a spiral retaining spiral portion, the vapor-liquid mixture input through the vapor-liquid input pipe passes through the spiral retaining spiral portion. The retaining spiral portions have a large surface area in contact with the vapor-liquid mixture, so that the liquid in the vapor-liquid mixture adheres to the retaining spiral portion and finally flows into the liquid collecting cylinder. The gas without the liquid flows to the next stage through the gas output cylinder. This structure is driven by a motor to rotate the gas-water separation cylinder and the retaining spiral portion to disturb the vapor-liquid mixture passing through the gas-water separation cylinder. When the vapor-liquid separation is impure, the retaining spiral portion pushes the vapor-liquid mixture toward the liquid collecting cylinder, reduces the flow rate of the vapor-liquid mixture, increases the contact time between the vapor-liquid mixture and the retaining spiral portion, and improves the separation efficiency. When the vapor-liquid separation meets the standard, the vapor-liquid separation is pushed to the gas output cylinder by the retaining spiral portion, thereby increasing the gas output rate and the output efficiency of high-temperature steam, hydrogen, and carbon dioxide.

[0018] 3. By extending a retaining spiral portion on the outside of the steam-water separation cylinder, the liquid flowing out of the liquid collection cylinder passes through the outer blades of the retaining spiral portion to cool the retaining spiral portion. The liquid flows downward along the retaining spiral portion to cool the retaining spiral portion in all directions. The cooled retaining spiral portion has a better gas-liquid separation effect, avoids liquid evaporation, improves gas purity, and improves the output purity of high-temperature steam, hydrogen, and carbon dioxide.

[0019] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0021] Figure 1 This is a connection diagram of a hydrogen production device according to an embodiment of the present invention;

[0022] Figure 2 It is an overall schematic diagram of a steam-water separator according to an embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view of a steam-water separator according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic structural diagram of a steam-water separation cylinder according to an embodiment of the present invention;

[0025] The markings in the attached figure are as follows: a, primary loop system; b, secondary loop system; c, reforming hydrogen production system; 01, coolant pump; 02, reactor; 03, stabilizer; 04, steam generator; 05, gas-water separator; 051, liquid collecting cylinder; 0511, connecting pipe; 052, gas-water separation cylinder; 0521, blocking spiral; 0522, V-shaped baffle; 053, gas output cylinder; 0531, gas output pipe; 054, gas-liquid input pipe; 055, driven gear; 056, motor; 057, driving gear; 058, recycling cylinder; 0581, liquid output pipe; 06, condenser; 07, solution tank; 08, methanol raw liquid tank; 09, reforming converter; 10, hydrogen absorption tower; 11, carbon dioxide analysis tower; 12, circulating water pump; 13, cooling tower; 14, water pump. DETAILED DESCRIPTION

[0026] like Figure 1As shown, the present invention discloses a methanol steam reforming hydrogen production device based on a pressurized water reactor environment, comprising a primary loop system a, a secondary loop system b and a reforming hydrogen production system c; the primary loop system a comprises a coolant pump 01, a reactor 02, a pressurizer 03 and a steam generator 04 connected in sequence, the liquid output end of the steam generator 04 is connected to the coolant pump 01, the coolant pump 01 inputs the coolant into the reactor 02, and the reactor 02 heats the high-temperature coolant through the steam generator 04 to generate high-temperature steam; the secondary loop system b comprises a steam-water separator 05 and a condenser 06, the steam generator 04 inputs the high-temperature steam into the steam-water separator The steam-water separator 05 separates the liquid and is connected to the condenser 06. The condenser 06 inputs the cooled liquid into the steam generator 04 again. The steam-water separator 05 can separate the cooling water that has not been fully heated to become water vapor, and the cooling water is fully condensed by the condenser 06 and then circulated back to the cooling tower 13; the reforming hydrogen production system c includes a methanol stock liquid tank 08 and a solution tank 07. The methanol stock liquid tank 08 transports the methanol stock liquid to the solution tank 07. The steam-water separator 05 of the secondary loop system b inputs the separated high-temperature gas into the solution tank 07. The solution tank 07 is filled with desalted water for mixing with methanol. The methanol stock liquid and the desalted water are mixed into a mixed liquid. The solution tank 0 The liquid output end of the solution tank 07 is connected to the condenser 06 of the secondary circuit system b; the gas output end of the solution tank 07 is connected to the reforming converter 09, the condenser 06 and the steam-water separator 05 in sequence, the gas output end of the steam-water separator 05 is connected to the hydrogen absorption tower 10 and the carbon dioxide analysis tower 11 in sequence, the liquid output end of the steam-water separator 05 is connected to the solution tank 07, the condenser 06 in the secondary circuit system b and the reforming hydrogen production system c are connected to the cooling tower 13 through the circulating water pump 12, and the methanol and desalted water mixed solution storage tank uses the high-temperature steam from the steam-water separator 05 of the secondary circuit system b to heat the methanol and desalted water mixed solution to produce methanol and water superheated steam Steam, reforming converter 09 is used to convert methanol and water superheated steam into H2 / CO2 / CO / methanol / water vapor and circulate the methanol solution obtained from condensation of condenser 06 back to the methanol and desalted water mixed solution storage tank, condenser 06 is used to condense high-temperature H2 / CO2 / CO / methanol / water vapor and obtain methanol solution and H2 / CO2, cooling tower 13 is used to cool high-temperature steam and provide circulating water for use, steam-water separator 05 is used to separate the cooled methanol solution and H2 / CO2, absorption tower is used to absorb CO2, desorption tower is used to release absorbed CO2, and finally CO2 and high-purity H2 can be released through regulating valve. This device can be used to simulate the environment (temperature) of pressurized water reactor, and use the generated high-temperature steam to reform methanol steam to produce hydrogen. This hydrogen production device can reuse water and methanol stock solution through steam-water separator 05 and condenser 06, save raw material input, and improve hydrogen production efficiency.

[0027] In a further solution, Figure 2 ,3 As shown in Figure 4, the steam-water separator 05 used in this scheme includes a liquid collecting cylinder 051, a steam-water separation cylinder 052 and a gas output cylinder 053. The upper end of the steam-water separation cylinder 052 is coaxially rotatably connected to the gas output cylinder 053, and the lower end of the steam-water separation cylinder 052 is coaxially rotatably connected to the liquid collecting cylinder 051. The liquid collecting cylinder 051 is laterally connected to a steam-liquid input pipe 054, and the upper end of the gas output cylinder 053 is connected to a gas output pipe 0531. The inner side wall of the steam-water separation cylinder 052 is provided with a spiral retaining spiral portion 0521 along the axis of the steam-water separation cylinder 052. The outer side of the steam-water separation cylinder 052 is coaxially fixed with a driven tooth 055. The rotation positions of the liquid collecting cylinder 051 and the gas output cylinder 053 are relatively fixed. The gas output cylinder 053 is fixedly connected to a motor 056, and the output end of the motor 056 is provided with an active tooth 057 meshing with the driven tooth 055.

[0028] This structure, by setting a spiral blocking spiral part 0521, allows the vapor-liquid mixture input through the vapor-liquid input pipe 054 to pass through the spiral blocking spiral part 0521. The blocking spiral part 0521 has a large surface area in contact with the vapor-liquid mixture, so that the liquid in the vapor-liquid mixture adheres to the blocking spiral part 0521 and finally flows into the liquid collecting cylinder 051. The gas without the liquid flows to the next stage through the gas output cylinder 053. This structure is driven by the motor 056 to rotate the vapor-water separation cylinder 052, and the blocking spiral part 0521 It rotates to disturb the gas-liquid mixture passing through the gas-water separation cylinder 052. When the gas-liquid separation is impure, the blocking spiral part 0521 pushes the gas-liquid mixture toward the liquid collecting cylinder 051, reduces the flow velocity of the gas-liquid mixture, increases the contact time between the gas-liquid mixture and the blocking spiral part 0521, and improves the separation efficiency. When the gas-liquid separation meets the standard, the gas-liquid separation is pushed toward the gas output cylinder 053 by the blocking spiral part 0521, so as to increase the gas output speed. In this hydrogen production device, the output efficiency of high-temperature steam, hydrogen and carbon dioxide is improved.

[0029] In a further solution, Figure 4 As shown, a plurality of V-shaped baffles 0522 are spirally distributed along the baffle spiral 0521 on one side of the baffle spiral 0521 facing the liquid collecting tube 051, and the concave surface of the V-shaped baffles 0522 faces the transmission direction of the gas. The V-shaped baffles 0522 increase the contact area between the gas-liquid mixture and the baffle spiral 0521, thereby improving the separation efficiency.

[0030] In a further solution, Figure 3As shown, it also includes a recycling cylinder 058, the upper and lower ends of which are sealed with the liquid collecting cylinder 051 and the gas output cylinder 053 respectively, the steam-water separation cylinder 052 is rotated and located inside the recycling cylinder 058, the spiral blades of the retaining spiral portion 0521 extend from the side wall of the steam-water separation cylinder 052 to form a spiral structure surrounding the outside of the steam-water separation cylinder 052, the lower end of the liquid collection cylinder 051 is connected to a connecting pipe 0511, the middle section of the connecting pipe 0511 is provided with a water pump 14, the end of the connecting pipe 0511 is connected to the upper end of the recycling cylinder 058, the output port of the connecting pipe 0511 is located above the blades of the retaining spiral portion 0521 exposed from the outside of the steam-water separation portion, and the lower end of the recycling cylinder 058 is connected to a liquid output pipe 0581.

[0031] In this scheme, a retaining spiral portion 0521 is extended from the outside of the steam-water separation cylinder 052, and the liquid flowing out of the liquid collecting cylinder 051 flows into the outer blades of the retaining spiral portion 0521 to cool the retaining spiral portion 0521. The liquid flows downward along the retaining spiral portion 0521, and the retaining spiral portion 0521 is cooled in all directions. The cooled retaining spiral portion 0521 has a better steam-liquid separation effect, avoids liquid evaporation, and improves gas purity. In this hydrogen production device, the output purity of high-temperature steam, hydrogen, and carbon dioxide is improved.

[0032] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A hydrogen production device based on methanol steam reforming in a pressurized water reactor environment, characterized in that: It includes a primary circuit system (a), a secondary circuit system (b) and a reforming hydrogen production system (c); The primary loop system (a) comprises a coolant pump (01), a reactor (02), a pressurizer (03) and a steam generator (04) connected in sequence, wherein a liquid output end of the steam generator (04) is connected to the coolant pump (01), the coolant pump (01) inputs coolant into the reactor (02), and the reactor (02) heats water with the high-temperature coolant through the steam generator (04) to generate high-temperature steam; The secondary circuit system (b) comprises a steam-water separator I (05b) and a condenser I (06b), the steam generator (04) inputs high-temperature steam into the steam-water separator I (05b), the steam-water separator I (05b) separates liquid and connects to the condenser I (06b), and the condenser I (06b) inputs the cooled liquid back into the steam generator (04); The reforming hydrogen production system (c) comprises a methanol raw liquid tank (08) and a solution tank (07), wherein the methanol raw liquid tank (08) transports the methanol raw liquid to the solution tank (07), and the steam-water separator I (05b) of the secondary loop system (b) inputs the separated high-temperature gas into the solution tank (07), and desalted water for mixing with methanol is added to the solution tank (07), and the liquid output end of the solution tank (07) is connected to the condenser I (06b) of the secondary loop system (b); the gas output end of the solution tank (07) is connected to the reforming converter (09), the condenser II (06c) and the steam-water separator II (05c) in sequence, and the gas output end of the steam-water separator II (05c) is connected to the hydrogen absorption tower (10) and the carbon dioxide analysis tower (11) in sequence, and the liquid output end of the steam-water separator II (05c) is connected to the solution tank (07).

2. The hydrogen production device based on methanol steam reforming in a pressurized water reactor environment according to claim 1 is characterized in that: The condenser I (06b) of the secondary loop system (b) is connected to the cooling tower I (13b) via a circulating water pump I (12b), and the condenser II (06c) in the reforming hydrogen production system (c) is connected to the cooling tower II (13c) via a circulating water pump II (12c).

3. The hydrogen production device based on methanol steam reforming in a pressurized water reactor environment according to claim 1 is characterized in that: The steam-water separators in the secondary circuit system (b) and the reforming hydrogen production system (c) both comprise a liquid collecting cylinder (051), a steam-water separation cylinder (052) and a gas output cylinder (053), wherein the upper end of the steam-water separation cylinder (052) is coaxially rotatably connected to the gas output cylinder (053), the lower end of the steam-water separation cylinder (052) is coaxially rotatably connected to the liquid collecting cylinder (051), the liquid collecting cylinder (051) is laterally connected to a steam-liquid input pipe (054), and the upper end of the gas output cylinder (053) is connected to a A gas output pipe (0531), the inner wall of the steam-water separation cylinder (052) is provided with a spiral retaining spiral portion (0521) along the axis of the steam-water separation cylinder (052), the outer side of the steam-water separation cylinder (052) is coaxially fixed with a driven tooth (055), the rotational positions of the liquid collection cylinder (051) and the gas output cylinder (053) are relatively fixed, the gas output cylinder (053) is fixedly connected to a motor (056), and the output end of the motor (056) is provided with a driving tooth (057) meshing with the driven tooth (055).

4. The hydrogen production device based on methanol steam reforming in a pressurized water reactor environment according to claim 3 is characterized in that: A plurality of V-shaped baffles (0522) are spirally distributed along the baffle spiral portion (0521) on one side of the baffle spiral portion (0521) facing the liquid collecting tube (051), and the concave surfaces of the V-shaped baffles (0522) face the conveying direction of the gas.

5. The hydrogen production device based on methanol steam reforming in a pressurized water reactor environment according to claim 4 is characterized in that: The invention also comprises a recycling cylinder (058), the upper and lower ends of which are respectively sealedly connected to the liquid collection cylinder (051) and the gas output cylinder (053); the steam-water separation cylinder (052) is rotatably located inside the recycling cylinder (058); the spiral blades of the retaining spiral portion (0521) extend from the side wall of the steam-water separation cylinder (052) to form a spiral structure surrounding the outside of the steam-water separation cylinder (052); the lower end of the liquid collection cylinder (051) is connected to a connecting pipe (0511); a water pump (14) is provided in the middle section of the connecting pipe (0511); the end of the connecting pipe (0511) is connected to the upper end of the recycling cylinder (058); the output port of the connecting pipe (0511) is located above the blades of the retaining spiral portion (0521) exposed from the outside of the steam-water separation portion; and the lower end of the recycling cylinder (058) is connected to a liquid output pipe (0581).

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