Efficient waste heat recovery energy-saving device for rectifying tower

Abstract

The utility model relates to the technical field of rectifying tower waste heat recovery devices, in particular to a rectifying tower efficient waste heat recovery energy-saving device which comprises a body, a tower top assembly is arranged at the top of the body, and a reinforcing assembly and an auxiliary assembly are arranged on the side face of the body. According to the utility model, the coupling reboiler is matched with the rectifying tower body for use, and liquid is vaporized by exchanging heat. The structure of the reboiler is similar to that of the condenser, the condenser is used for cooling, the reboiler is used for heating and vaporizing, and due to the action of static pressure difference, evaporated liquid level can be continuously supplemented to the tower bottom, so that stable operation of the system is maintained, low-temperature gas at an outlet is compressed by the compressor, condensation is not needed, the temperature and pressure of the gas are increased, and the energy consumption is reduced. The enthalpy value of the gas is increased, then the gas is used as a heat source of the reboiler to heat materials, latent heat of the gas is fully utilized, the use amount of live steam and circulating water are reduced, and the operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to distillation column waste heat recovery device technical field, specifically is a kind of distillation column high -efficient waste heat recovery energy-saving device. BACKGROUND

[0002] Distillation column is a tower type gas-liquid contactor for distillation, which utilizes the different volatility of components in a mixture, i.e., the different vapor pressures of components at the same temperature, to transfer light components in the liquid phase to the gas phase and heavy components in the gas phase to the liquid phase, thereby achieving the purpose of separation. However, when the distillation column is used, most of the heat remains, which causes resource waste and is not conducive to energy saving and environmental protection if not recycled.

[0003] The patent CN221831699U discloses a distillation column waste heat recovery device. The patent technology sets heat-conducting fins, spring tubes, recovery plates, gaskets and first insulation plates. When in use, the gas inside the distillation column enters the main condenser through the first conduit. The gas passing through the first conduit releases some heat, which is stored in the inner cavity formed by the two recovery plates. When the heat remaining in the distillation column is recycled, the heat inside the distillation column is transferred to the first conduit. Cold water is introduced into the spring tube. The heat-conducting fins outside the first conduit will conduct heat out. The cold water inside the spring tube is heated, thereby recycling heat and improving the recycling efficiency. Meanwhile, the first and second insulation plates are buckled outside the two recovery plates, which will insulate the recovery plates to avoid heat dissipation. However, the ordinary reboiler is used to recycle the waste heat of the distillation column in the above-mentioned scheme. The reboiler has poor heat recovery effect and poor heat exchange performance, which is not conducive to the recycling of the waste heat of the overhead column. Therefore, a distillation column high-efficiency waste heat recovery energy-saving device is needed to improve the above-mentioned problems. SUMMARY

[0004] To solve the problem that the ordinary reboiler is used to recycle the waste heat of the distillation column in the existing scheme, which has poor heat recovery effect and poor heat exchange performance, and is not conducive to the recycling of the waste heat of the overhead column, the purpose of the present utility model is to provide a distillation column high-efficiency waste heat recovery energy-saving device to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A distillation column high-efficiency waste heat recovery energy-saving device includes a main body, a tower top assembly is arranged at the top of the main body, and an enhanced assembly and a falling film assembly are arranged on the side of the main body.

[0007] The reinforcing assembly comprises a condensing pipe, a coupling reboiler is fixedly connected to the side of the condensing pipe, a pump body is fixedly connected to the side of the coupling reboiler, and a discharge pipe is fixedly connected to the side of the pump body.

[0008] The falling film assembly comprises a connecting pipe, a falling film evaporator is fixedly connected to the side of the connecting pipe, and a production pipe is fixedly connected to the top of the falling film evaporator.

[0009] As a preferred scheme of the present application, the top of the condensing pipe is fixedly connected with a reflux pipe, the side of the reflux pipe is fixedly connected with a light component cooling pipe and a liquid flow meter.

[0010] As a preferred scheme of the present application, the main body comprises a rectifying tower body, and the bottom of the rectifying tower body is fixedly connected with a tower bottom product connecting pipe.

[0011] As a preferred scheme of the present application, the side of the rectifying tower body is provided with a supporting frame, and the rectifying tower body is arranged inside the supporting frame.

[0012] As a preferred scheme of the present application, the top of the rectifying tower body is provided with a clamp, and the supporting frame is provided with two.

[0013] As a preferred scheme of the present application, the overhead assembly comprises a steam conveying pipe, and a total condenser is fixedly connected to the bottom of the steam conveying pipe.

[0014] As a preferred scheme of the present application, the top of the steam conveying pipe is fixedly connected with a cooler, and the bottom of the cooler is fixedly connected with a steam compressor.

[0015] As a preferred scheme of the present application, the side of the steam compressor is fixedly connected with a tower top product connecting pipe, and the steam conveying pipe and the tower top product connecting pipe are in communication.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. In the present application, the coupling reboiler and the rectifying tower body are used in cooperation to vaporize liquid by exchanging heat. The structure of the reboiler is similar to that of the condenser, the condenser is used for cooling, and the reboiler is used for heating vaporization. Due to the action of static pressure difference, the tower bottom will continuously supplement the liquid level evaporated, thereby maintaining the stable operation of the system. The low-temperature gas at the outlet is compressed by the compressor without condensation, the temperature and pressure of the gas are increased, the enthalpy of the gas is increased, and then the gas is used as a heat source for the reboiler to heat the material. The latent heat of the gas is fully utilized, the amount of live steam and circulating water is reduced, and the operation cost is reduced.

[0018] 2. The utility model discloses, through utilize falling film evaporator with heated liquid forms liquid film at the vertical pipe wall, make the heat energy in liquid through liquid film transmission to the outside, to realize the process of evaporation, falling film evaporator in the use process material is in normal pressure environment, utilize self -gravity along the inner wall of pipeline downward operation, energy -conserving, falling film evaporator has high heat transfer coefficient, compact structure, convenient installation, the residence time is short in the heating section, not easy to scale, adjust convenient, small footprint. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the whole structure schematic diagram of the utility model;

[0020] Figure 2 It is the tower top subassembly structure schematic diagram of the utility model;

[0021] Figure 3 It is the enhancement subassembly structure schematic diagram of the utility model;

[0022] Figure 4 It is the falling film subassembly structure schematic diagram of the utility model.

[0023] In the drawing: 1, main body;101, rectifying tower body;102, support frame;103, clamp;104, tower bottom product connecting pipe;2, tower top subassembly;201, steam delivery pipe;202, total condenser;203, cooler;204, steam compressor;205, tower top product connecting pipe;3, enhancement subassembly;301, condenser pipe;302, reflux pipe;303, light component cooling pipe;304, liquid flow meter;305, coupled reboiler;306, pump body;307, row pipe;4, falling film subassembly;401, link pipe;402, falling film evaporator;403, production pipe. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0025] Embodiment: please refer to Figures 1-4 The utility model discloses, through utilize falling film evaporator with heated liquid forms liquid film at the vertical pipe wall, make the heat energy in liquid through liquid film transmission to the outside, to realize the process of evaporation, falling film evaporator in the use process material is in normal pressure environment, utilize self -gravity along the inner wall of pipeline downward operation, energy -conserving, falling film evaporator has high heat transfer coefficient, compact structure, convenient installation, the residence time is short in the heating section, not easy to scale, adjust convenient, small footprint.

[0026] In the embodiment, refer to Figure 1 、 Figure 3 And Figure 4As shown, the enhanced assembly 3 includes a condenser pipe 301, the side of the condenser pipe 301 is fixedly connected with a coupled reboiler 305, the side of the coupled reboiler 305 is fixedly connected with a pump body 306, the side of the pump body 306 is fixedly connected with a discharge pipe 307, the falling film assembly 4 includes a connecting pipe 401, the side of the connecting pipe 401 is fixedly connected with a falling film evaporator 402, the top of the falling film evaporator 402 is fixedly connected with a production pipe 403, the coupled reboiler 305 is used in cooperation with the rectifying tower body 101, the heat exchange is used to vaporize the liquid, the condenser is used for cooling, and the reboiler is used for heating to vaporize, due to the action of the static pressure difference, the tower bottom continuously supplements the liquid level evaporated, so that the stable operation of the system is maintained, the low-temperature gas at the outlet is compressed by the compressor, does not need to be condensed, the temperature and pressure of the gas are increased, the enthalpy value of the gas is increased, and then the gas is used as a heat source of the reboiler to heat the material, the latent heat of the gas is fully utilized, the amount of live steam and circulating water is reduced, and the operation cost is reduced.

[0027] As shown, the top of the condenser pipe 301 is fixedly connected with a return pipe 302, the side of the return pipe 302 is fixedly connected with a light component cooling pipe 303 and a liquid flow table 304, the falling film evaporator 402 is used to form a liquid film on the vertical pipe wall by heating the liquid, so that the heat energy in the liquid is transmitted to the outside through the liquid film, to realize the evaporation process, the material of the falling film evaporator 402 is in a normal pressure environment during use, and runs along the inner wall of the pipeline under the action of its own gravity, so that energy is saved, the falling film evaporator 402 has the advantages of high heat transfer coefficient, compact structure, convenient installation, short residence time in the heating section, not easy to scale, convenient adjustment, and small occupied area.

[0028] In this embodiment, referring to Figure 1 and Figure 2 As shown, the main body 1 includes a rectifying tower body 101, the bottom of the rectifying tower body 101 is fixedly connected with a tower bottom product connecting pipe 104, the side of the rectifying tower body 101 is provided with a supporting frame 102, the rectifying tower body 101 is arranged in the inside of the supporting frame 102, the top of the rectifying tower body 101 is provided with a clamp 103, the supporting frame 102 is provided with two, the tower top assembly 2 includes a steam conveying pipe 201, the bottom of the steam conveying pipe 201 is fixedly connected with a total condenser 202, the top of the steam conveying pipe 201 is fixedly connected with a cooler 203, the bottom of the cooler 203 is fixedly connected with a steam compressor 204, the side of the steam compressor 204 is fixedly connected with a tower top product connecting pipe 205, the steam conveying pipe 201 and the tower top product connecting pipe 205 are in communication, the clamp 103 is a fixing piece for connecting the tower top pipe and the steam conveying pipe 201, the clamp 103 can improve the reliability of the connection, ensure the safe passage of the connection, and has the characteristics of high flexibility, convenient disassembly and assembly.

[0029] The energy-saving device for high-efficiency waste heat recovery of a rectifying tower in the scheme is used, mother liquor is preheated by three stages and then enters the rectifying tower, separation is realized in the rectifying tower, liquid flows into the coupled reboiler 305 from the bottom of the rectifying tower, the heat source of the coupled reboiler 305 is high-pressure gas at the outlet, the gas at the top of the rectifying tower is compressed into high-temperature and high-pressure gas by the steam compressor 204, the high-temperature and high-pressure gas enters the coupled reboiler 305 to exchange heat, after condensation, the light component part is taken out and part of the reflux, the heavy component at the bottom of the tower pot enters the preheater to exchange heat with the feed mother liquor, and then passes through the condensed liquid of the light component condensed by the reboiler, is buffered by the buffer tank, and the condenser is used for cooling.

[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency waste heat recovery energy-saving device for rectifying column, comprising a main body (1), characterized in that: The top of the main body (1) is provided with a tower top assembly (2), and the side of the main body (1) is provided with an enhanced assembly (3) and a falling film assembly (4); The enhanced assembly (3) comprises a condensing pipe (301), the side of the condensing pipe (301) is fixedly connected with a coupled reboiler (305), the side of the coupled reboiler (305) is fixedly connected with a pump body (306), and the side of the pump body (306) is fixedly connected with a discharge pipe (307). The falling film assembly (4) comprises a connecting pipe (401), the side of the connecting pipe (401) is fixedly connected with a falling film evaporator (402), and the top of the falling film evaporator (402) is fixedly connected with a production pipe (403).

2. The energy saving device for efficiently recovering waste heat of a rectifying tower according to claim 1, characterized in that: The top of the condensing pipe (301) is fixedly connected with a return pipe (302), the side of the return pipe (302) is fixedly connected with a light component cooling pipe (303) and a liquid flow table (304).

3. The energy saving device for efficiently recovering waste heat of a rectifying tower according to claim 1, characterized in that: The main body (1) comprises a rectifying tower body (101), and the bottom of the rectifying tower body (101) is fixedly connected with a tower bottom product connecting pipe (104).

4. The energy saving device for efficiently recovering waste heat of a rectifying tower according to claim 3, characterized in that: The side of the rectifying tower body (101) is provided with a supporting bracket (102), and the rectifying tower body (101) is arranged in the supporting bracket (102).

5. The energy saving device for efficiently recovering waste heat of a rectifying tower according to claim 4, characterized in that: The top of the rectifying tower body (101) is provided with a clamp (103), and the supporting bracket (102) is provided with two.

6. The energy saving device for efficiently recovering waste heat of a rectifying tower according to claim 1, characterized in that: The tower top assembly (2) comprises a steam conveying pipe (201), and the bottom of the steam conveying pipe (201) is fixedly connected with a total condenser (202).

7. The energy saving device for efficiently recovering waste heat of a rectifying tower according to claim 6, characterized in that: The top of the steam conveying pipe (201) is fixedly connected with a cooler (203), and the bottom of the cooler (203) is fixedly connected with a steam compressor (204).

8. The energy saving device for efficiently recovering waste heat of a rectifying tower according to claim 7, characterized in that: The side of the steam compressor (204) is fixedly connected with a tower top product connecting pipe (205), and the steam conveying pipe (201) communicates with the tower top product connecting pipe (205).

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