Waste heat recovery device for methanol synthesis

Abstract

The utility model relates to the technical field of chemical engineering, in particular to a waste heat recovery device for methanol synthesis, which comprises a first sealing pipe and a second sealing pipe which are matched with each other and are used in a sealing manner, and further comprises a heat exchange mechanism with two ends respectively fixed on the surfaces of the first sealing pipe and the second sealing pipe, the heat exchange mechanism comprises a fixing part fixed to the opposite sides of the first sealing pipe and the second sealing pipe, a cutting part is fixed to the position, located in the second sealing pipe, of one side of the fixing part, the first sealing pipe and the second sealing pipe are arranged and used for sealing the two sides of the barrel, waste heat generated by methanol is conveniently recycled through the heat exchange mechanism, and the heat exchange efficiency is improved. The barrel is conveniently fixed to the first sealing pipe and the second sealing pipe through the fixing part, methanol conveyed by the feeding pipe is conveniently isolated through the dividing part, methanol is conveniently subjected to heat exchange treatment through the communicating part, heat generated by methanol is conveniently recycled through the waste heat recycling pipe, and methanol is conveniently conveyed to the barrel through the feeding pipe for heat exchange.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to a waste heat recovery device for methanol synthesis. Background Art

[0002] Methanol is a colorless liquid with a pungent odor. It is a type of inorganic substance, also known as methyl methanol or wood alcohol. Waste heat recovery in the methanol synthesis process refers to the recovery of heat energy from unreacted gases produced during the methanol production process, and then using this heat energy for the next round of methanol synthesis reaction. Through the waste heat recovery device, these unreacted gases are collected and cooled for the next step of heat exchange. Through heat exchange, the heat energy of these gases is transferred to other substances being heated. Finally, the recovered waste heat is used to carry out the methanol synthesis reaction again, forming a closed cycle. This waste heat recovery method can not only effectively utilize the waste gas in the methanol production process, but also improve the methanol yield.

[0003] During the use of the existing waste heat recovery device for methanol synthesis, since the synthesis process of methanol is a highly exothermic process, a large amount of waste heat is generated in the production process. If it cannot be recovered and utilized in a timely and effective manner, the waste heat will be wasted, which in turn leads to low efficiency and poor recovery effect of methanol waste heat, thereby causing waste of energy and waste of heat energy. The waste of heat energy will further lead to environmental pollution, because the release of heat energy will produce greenhouse gases such as carbon dioxide, causing the gas to have a negative impact on the environment. Utility Model Content

[0004] The purpose of the utility model is to provide a waste heat recovery device for methanol synthesis to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste heat recovery device for methanol synthesis, comprising a first sealed tube and a second sealed tube that cooperate with each other for sealing, and also comprising: a heat exchange mechanism whose two ends are respectively fixed to the surfaces of the first sealed tube and the second sealed tube, the heat exchange mechanism comprising a fixing piece fixed to the opposite side of the first sealed tube and the second sealed tube, a dividing piece is fixed on one side of the fixing piece and located inside the second sealed tube, and a connecting piece is fixed on one side of the dividing piece and away from the second sealed tube; a waste heat recovery pipe connected to the top of the fixing piece, and a feeding pipe is connected to one side of the waste heat recovery pipe located on the outside of the second sealed tube.

[0006] Preferably, the fixing member comprises a cylinder, and a first flange and a second flange fixedly connected to the first sealing tube and the second sealing tube are respectively fixed on two sides of the cylinder.

[0007] Preferably, the dividing member comprises a tube sheet fixed to the second flange and the inside of the second sealing tube, and a partition is fixed on one side of the tube sheet and located inside the second sealing tube.

[0008] Preferably, the connecting piece comprises a baffle fixed to the inside of the cylinder, and a heat exchange tube whose two ends are respectively connected to the inside of the first sealed tube and the second sealed tube is fixed inside the baffle.

[0009] Preferably, a discharge pipe is connected to one side of the feed pipe and located at the bottom of the second sealing pipe, and a first supporting column for supporting the discharge pipe is fixed to the bottom of the discharge pipe.

[0010] Preferably, one side of the discharge pipe is connected to a three-way valve for connecting a pipeline, and a valve for controlling the liquid flow is arranged on the top of the three-way valve.

[0011] Preferably, support frames for supporting the cylinder are fixed on both sides of the bottom of the cylinder, and fixing blocks are fixed on the bottoms of the two support frames.

[0012] Preferably, both sides of the bottom of the cylinder are connected with infusion tubes, and a second supporting column for supporting the infusion tube is fixed to the bottom of the infusion tube.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model is used to seal the two sides of the cylinder by arranging the first sealing tube and the second sealing tube. The heat exchange mechanism is convenient for recycling the waste heat generated by the methanol. The fixing piece is convenient for fixing the cylinder to the first sealing tube and the second sealing tube respectively. The dividing piece is convenient for isolating the methanol transported by the feeding pipe. The connecting piece is convenient for heat exchange treatment of the methanol. The waste heat recovery pipe is convenient for recycling the heat generated by the methanol. The feeding pipe is convenient for transporting the methanol to the cylinder for heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a preferred embodiment of a waste heat recovery device for methanol synthesis provided by the utility model;

[0016] Figure 2 A schematic diagram of the heat exchange mechanism provided by the utility model;

[0017] Figure 3 A schematic diagram of the structure of the infusion tube provided by the utility model;

[0018] Figure 4 This is a cross-sectional view of the heat exchange mechanism structure provided by the utility model.

[0019] In the figure: 1. first sealing pipe; 2. heat exchange mechanism; 21. fixing part; 211. cylinder; 212. first flange; 213. second flange; 22. dividing part; 221. tube sheet; 222. partition; 23. connecting part; 231. baffle; 232. heat exchange tube; 3. second sealing pipe; 4. waste heat recovery pipe; 5. feed pipe; 6. discharge pipe; 7. three-way valve; 8. valve; 9. first support column; 10. support frame; 11. fixing block; 12. infusion tube; 13. second support column. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] See also Figure 1-4 As shown, a waste heat recovery device for methanol synthesis includes a first sealed tube 1 and a second sealed tube 3 that are used in a sealed manner in cooperation with each other, and also includes: a heat exchange mechanism 2 whose two ends are respectively fixed to the surfaces of the first sealed tube 1 and the second sealed tube 3, the heat exchange mechanism 2 includes a fixing member 21 fixed to the first sealed tube 1 and the second sealed tube 3 on one side opposite to the other, a dividing member 22 is fixed to one side of the fixing member 21 and located inside the second sealed tube 3, and a connecting member 23 is fixed to one side of the dividing member 22 and away from the second sealed tube 3; a waste heat recovery pipe 4 connected to the top of the fixing member 21, and the waste heat recovery pipe 4 is connected to the top of the fixing member 21. The feed pipe 5 is connected to the outside of the second sealing tube 3. It should be noted that: by arranging the first sealing tube 1 and the second sealing tube 3, the two sides of the cylinder 211 are sealed, and the heat exchange mechanism 2 is convenient for recovering the waste heat generated by methanol. The fixing part 21 is convenient for fixing the cylinder 211 to the first sealing tube 1 and the second sealing tube 3 respectively, the dividing part 22 is convenient for isolating the methanol transported by the feed pipe 5, the connecting part 23 is convenient for heat exchange treatment of methanol, the waste heat recovery pipe 4 is convenient for recovering the heat generated by methanol, and the feed pipe 5 is convenient for transporting methanol to the cylinder 211 for heat exchange.

[0022] See also Figure 2As shown, the fixing member 21 includes a cylinder 211, and the first flange 212 and the second flange 213 fixedly connected to the first sealed tube 1 and the second sealed tube 3 are respectively fixed on both sides of the cylinder 211; the dividing member 22 includes a tube sheet 221 fixed to the second flange 213 and the second sealed tube 3, and a partition 222 is fixed on one side of the tube sheet 221 and located inside the second sealed tube 3; the connecting member 23 includes a baffle 231 fixed to the inside of the cylinder 211, and the inside of the baffle 231 is fixed with a heat exchange tube 232 whose two ends are respectively connected to the inside of the first sealed tube 1 and the second sealed tube 3. It should be noted that: the cylinder 211 is connected to the first sealed tube 1 and the second sealed tube 3 through the first flange 212 and the second flange 213. 3 is connected and fixed, methanol enters the second sealed tube 3 through the feed pipe 5, and the second sealed tube 3 is separated by the partition 222, so that methanol flows from the upper layer into the heat exchange tube 232 fixed and supported by the tube sheet 221 and the baffle 231, the methanol in the heat exchange tube 232 reacts with the liquid in the cylinder 211, and the heat transfer effect is improved by the baffle 231, and the generated waste heat and gas are recovered and reused through the waste heat recovery pipe 4 at the top of the cylinder 211, and the methanol in the heat exchange tube 232 flows into the first sealed tube 1, and is heat exchanged again through the heat exchange tube 232 of the lower layer, and finally the methanol flows into the second sealed tube 3 through the heat exchange tube 232 of the lower layer and is located at the bottom of the partition 222.

[0023] See also Figure 3 and Figure 4 As shown, a discharge pipe 6 is connected to one side of the feed pipe 5 and is located at the bottom of the second sealing pipe 3, and a first support column 9 for supporting the discharge pipe 6 is fixed to the bottom of the discharge pipe 6; a three-way valve 7 for connecting a pipeline is connected to one side of the discharge pipe 6, and a valve 8 for controlling the liquid flow is arranged on the top of the three-way valve 7; support frames 10 for supporting the cylinder 211 are fixed on both sides of the bottom of the cylinder 211, and a fixing block 11 is fixed on the bottom of the two support frames 10; an infusion pipe 12 is connected to both sides of the bottom of the cylinder 211, and a support block 11 is fixed on the bottom of the infusion pipe 12 The second support column 13 supporting the infusion tube 12, it should be noted that: the methanol after heat exchange is transported to the three-way valve 7 through the discharge pipe 6 supported by the first support column 9, and the methanol is transported to the container for storing methanol through the control valve 8. By arranging the support frame 10 and the fixed block 11, it is convenient to support the cylinder 211 for heat exchange work and ensure the stability of the cylinder 211. By arranging the infusion tube 12, it is convenient to transport the liquid that undergoes heat exchange reaction with methanol into the cylinder 211. By arranging the second support column 13, it is convenient to support the infusion tube 12 and ensure its stability.

[0024] Working principle: When in use, the cylinder 211 is connected and fixed with the first sealing tube 1 and the second sealing tube 3 through the first flange 212 and the second flange 213. Methanol enters the second sealing tube 3 through the feed pipe 5. The second sealing tube 3 is separated by the partition 222, so that methanol flows from the upper layer into the heat exchange tube 232 fixed and supported by the tube sheet 221 and the baffle 231. The liquid that undergoes heat exchange reaction with methanol is transported to the cylinder 211 through the liquid delivery pipe 12. The methanol in the heat exchange tube 232 reacts with the liquid in the cylinder 211. The heat transfer effect is improved by the baffle 231, and the waste heat and gas generated are recovered and reused through the waste heat recovery pipe 4 on the top of the cylinder 211, and the methanol in the heat exchange tube 232 flows into the first sealed tube 1, and is heat exchanged again through the lower heat exchange tube 232. Finally, the methanol flows into the second sealed tube 3 through the lower heat exchange tube 232 and is located at the bottom of the partition 222. The methanol after heat exchange is transported to the three-way valve 7 through the discharge pipe 6 supported by the first support column 9, and the methanol is transported to the container for storing methanol through the control valve 8.

[0025] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A waste heat recovery device for methanol synthesis, comprising a first sealing tube (1) and a second sealing tube (3) which cooperate with each other for sealing, characterized in that: Also includes: A heat exchange mechanism (2) with two ends respectively fixed to the surfaces of a first sealed tube (1) and a second sealed tube (3), the heat exchange mechanism (2) comprising a fixing member (21) fixed to opposite sides of the first sealed tube (1) and the second sealed tube (3), the fixing member (21) being located inside the second sealed tube (3) and having a partition member (22) fixed thereto, and a connecting member (23) being fixed to a side of the partition member (22) facing away from the second sealed tube (3); A waste heat recovery pipe (4) is connected to the top of the fixing member (21), and one side of the waste heat recovery pipe (4) is located outside the second sealing pipe (3) and is connected to a feed pipe (5).

2. The waste heat recovery device for methanol synthesis according to claim 1, characterized in that: The fixing member (21) comprises a cylinder (211), and a first flange (212) and a second flange (213) fixedly connected to the first sealing tube (1) and the second sealing tube (3) are respectively fixed on both sides of the cylinder (211).

3. The waste heat recovery device for methanol synthesis according to claim 1, characterized in that: The partition (22) comprises a tube sheet (221) fixed to the second flange (213) and the inside of the second sealing tube (3); a partition (222) is fixed to one side of the tube sheet (221) located inside the second sealing tube (3).

4. The waste heat recovery device for methanol synthesis according to claim 1, characterized in that: The connecting piece (23) comprises a baffle (231) fixed inside the cylinder (211), and a heat exchange tube (232) whose two ends are respectively connected to the inside of the first sealed tube (1) and the second sealed tube (3) is fixed inside the baffle (231).

5. The waste heat recovery device for methanol synthesis according to claim 1, characterized in that: The feed pipe (5) is located at the bottom of the second sealing pipe (3) and is connected to the discharge pipe (6). A first support column (9) for supporting the discharge pipe (6) is fixed to the bottom of the discharge pipe (6).

6. The waste heat recovery device for methanol synthesis according to claim 5, characterized in that: One side of the discharge pipe (6) is connected to a three-way valve (7) for connecting a pipeline, and a valve (8) for controlling the flow of liquid is arranged on the top of the three-way valve (7).

7. The waste heat recovery device for methanol synthesis according to claim 2, characterized in that: Support frames (10) for supporting the cylinder (211) are fixed on both sides of the bottom of the cylinder (211), and fixing blocks (11) are fixed on the bottoms of the two support frames (10).

8. The waste heat recovery device for methanol synthesis according to claim 2, characterized in that: Both sides of the bottom of the cylinder (211) are connected to an infusion tube (12), and a second support column (13) for supporting the infusion tube (12) is fixed to the bottom of the infusion tube (12).

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