Heat exchanger for propane de-heavy tower

Abstract

The utility model discloses a heat exchanger for a propane de-heavy tower, which comprises a treatment box fixedly mounted at the top of the propane de-heavy tower, and a gas outlet pipe fixedly penetrating into the treatment box is fixedly communicated with the top of the propane de-heavy tower; and the fixed box is fixedly mounted at the top of the treatment box. By arranging a series of structures, heat exchange is facilitated, propane hot steam discharged upwards is converted into liquid propane to be collected, the phenomenon that follow-up heat exchange is unstable due to the high temperature of the Z-shaped hollow condensation pieces can be reduced by means of the mode that cold water circulation is matched with a cooling-water machine to cool cold water, and the application continuous stability of cold water is improved; the system can remotely switch to another mode for discharging and utilizing work in combination with heat energy of heat exchange, the use flexibility is improved, automatic discharging and recycling work can be conveniently carried out when the liquid level of high-purity propane collected through heat exchange conversion is high, and the use automation degree and convenience are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field, concretely is a kind of heat exchanger for propane depropanizer. BACKGROUND

[0002] Propane depropanizer is also called propane reactor, which heats propane inside to produce hot steam to form distillation purification effect. During this period, light component gas floats up and is discharged naturally through the gas outlet pipe. Heavy component products accumulate at the bottom of the tower. Heat exchanger is installed at the top of the tower to exchange heat with hot steam for cooling to condense water droplets to form high-purity propane. The existing heat exchanger at the top of the depropanizer is usually a plate heat exchanger or a condensing sheet heat exchanger.

[0003] The existing heat exchanger at the top of the propane depropanizer has the following disadvantages when in use: 1. Poor cooling stability, as the temperature of the cooling condensing sheet increases, the subsequent heat exchange stability decreases, and the heat exchange mode is single; 2. Cannot automatically discharge and recover high-purity propane collected by condensation when the liquid level is high, and needs to be operated separately. In view of this, the present application provides a heat exchanger for propane depropanizer to solve the above-mentioned problems. SUMMARY

[0004] The utility model aims at providing a kind of heat exchanger for propane depropanizer to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of heat exchanger for propane depropanizer, comprising:

[0006] A treatment box is fixedly installed at the top of the propane depropanizer. The top of the propane depropanizer is connected with a gas outlet pipe that penetrates into the treatment box.

[0007] A fixed box is fixedly installed at the top of the treatment box.

[0008] A water storage tank is fixedly installed at the top of the fixed box. The inside of the water storage tank is filled with cold water.

[0009] A PLC controller is fixedly installed at the top of the fixed box.

[0010] A water circulation heat exchange condensing assembly is fixedly installed in the treatment box and is connected with the fixed box and the water storage tank. The water circulation heat exchange condensing assembly is electrically connected with the PLC controller. When the light substance gas is floated up through the gas outlet pipe and discharged into the treatment box by heating to produce hot steam inside the propane depropanizer, the water circulation heat exchange condensing assembly uses heat absorption and water circulation auxiliary cooling to absorb heat from the hot steam and cool it to form condensate water droplets to collect high-purity propane in liquid form in the treatment box.

[0011] The water supplementing and discharging utilization assembly is installed on the water storage tank and the fixed box and is electrically connected with the PLC controller; the water supplementing and discharging utilization assembly is used for, when being controlled by the PLC controller to switch to the hot water utilization, directly discharging the collected hot water for utilization and automatically supplementing the water into the water storage tank, so as to have another mode of utilization.

[0012] The propane liquid level detection and discharging assembly is installed on the outside of the processing tank and is electrically connected with the PLC controller; the propane liquid level detection and discharging assembly is used for detecting the liquid level of the collected high-purity propane and, when the liquid level reaches the preset high liquid level, automatically discharging the collected high-purity propane for recycling work under the control of the PLC controller.

[0013] Preferably, the water circulation heat exchange condensing assembly comprises a plurality of Z-shaped hollow condensing pieces fixedly connected between the inner walls of the front and rear sides of the processing tank at equal intervals, the top and bottom of each Z-shaped hollow condensing piece is communicated and fixed with a water pipe, the top ends of the water pipes located above are communicated and fixed with the bottom of the fixed box, a guide pipe is fixedly installed on the right inner wall of the processing tank, the bottom ends of the water pipes located below are communicated and fixed with the guide pipe, a first water pump and a cold water machine are fixedly installed on the top of the fixed box, the water inlet of the first water pump is communicated and fixed with the bottom of the water storage tank, the water outlet of the first water pump is communicated and fixed with one end of the guide pipe, a first electromagnetic valve is communicated and fixed between the water inlet of the cold water machine and the top of the fixed box, the water outlet of the cold water machine is communicated and fixed with a backwater pipe, the top end of the backwater pipe extends into the water storage tank, and the first water pump, the cold water machine and the first electromagnetic valve are electrically connected with the PLC controller.

[0014] Preferably, the water supplementing and discharging utilization assembly comprises a second water pump fixedly installed on the top left side of the water storage tank and having a water outlet communicated with the inside thereof, the water inlet of the second water pump is communicated and fixed with a water supply hose, a second electromagnetic valve is communicated and fixed on the top right side of the fixed box, a water supply pipe is communicated and fixed with the top end of the second electromagnetic valve, and the second electromagnetic valve and the second water pump are electrically connected with the PLC controller.

[0015] Preferably, the propane liquid level detection and discharging assembly comprises a third electromagnetic valve communicated and fixed on the bottom right side of the processing tank, a conveying hose is communicated and fixed with the right end of the third electromagnetic valve, the bottom inner wall of the processing tank is provided as an inclined surface, a liquid level sensor is fixedly installed on the right side and the bottom right side of the processing tank, the detection ends of the two liquid level sensors extend into the processing tank, the liquid level sensor located on the right side is lower than the top end of the gas outlet pipe in height, and the two liquid level sensors and the third electromagnetic valve are electrically connected with the PLC controller.

[0016] Preferably, the top of the PLC controller is fixedly and electrically connected with a wireless remote control switch, and the wireless remote control switch is matched with an external remote controller.

[0017] Preferably, the front and rear side walls of the treatment box are fixedly installed with an arc-shaped baffle above the gas outlet pipe, and four supports are fixedly connected in a rectangular shape between the bottom of the treatment box and the top of the propane depropanizer tower.

[0018] Preferably, the water storage tank is made of copper, and a plurality of heat dissipation fins are fixedly installed on the four sides of the water storage tank.

[0019] Compared with the prior art, the propane depropanizer tower heat exchanger has the following beneficial effects:

[0020] 1. The PLC controller, the fixing box, the treatment box, the water storage tank and the water circulation heat exchange condensing assembly cooperate to convert the upwardly discharged propane hot steam into liquid propane for collection, and the cold water circulation and the cold water cooler are used to reduce the instability of subsequent heat exchange caused by high temperature of the Z-shaped hollow condensing piece, improve the application stability of the cold water, and improve the use flexibility.

[0021] 2. The PLC controller, the fixing box, the water storage tank, the water circulation heat exchange condensing assembly, the water supplementing and discharging utilization assembly and the wireless remote control switch cooperate to remotely switch to another mode for external discharge utilization work, facilitate flexible switching between external discharge utilization and water supplementing and circulating cooling, and improve the use flexibility.

[0022] 3. The PLC controller, the treatment box and the propane liquid level detection and discharge assembly cooperate to automatically discharge and recover when the high-purity propane liquid level collected by heat exchange conversion is high, without the need for separate discharge recovery operation, thereby improving the use automation degree and convenience.

[0023] The propane depropanizer tower heat exchanger has a series of structures, which can convert the upwardly discharged propane hot steam into liquid propane for collection, can use the cold water circulation and the cold water cooler to reduce the instability of subsequent heat exchange caused by high temperature of the Z-shaped hollow condensing piece, improve the application stability of the cold water, can remotely switch to another mode for external discharge utilization work, improve the use flexibility, and facilitate automatic discharge and recovery when the high-purity propane liquid level collected by heat exchange conversion is high, thereby improving the use automation degree and convenience. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 A structure diagram of the propane depropanizer tower heat exchanger is provided.

[0025] Fig. 2 A partial cross-sectional structure diagram of the propane depropanizer tower heat exchanger is provided.

[0026] Fig. 3The utility model provides a kind of fixed box, guide pipe, water pipe and Z-shaped hollow condensing piece connecting piece stereoscopic structure schematic diagram of heat exchanger for propane deheavy tower are proposed.

[0027] In the drawing: 100, gas pipe; 1, processing box; 101, arc baffle; 102, fixed box; 2, water storage tank; 3, PLC controller; 301, wireless remote control switch; 4, first water pump; 401, guide pipe; 402, Z-shaped hollow condensing piece; 403, water pipe; 404, water cooler; 405, first electromagnetic valve; 5, second water pump; 501, second electromagnetic valve; 6, liquid level sensor; 601, third electromagnetic valve. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] As Figs. 1 to 3 shown, the utility model discloses a kind of heat exchangers for propane deheavy tower, comprising:

[0030] Processing box 1 is fixedly installed at the top of propane deheavy tower, and the top of propane deheavy tower is connected with the gas pipe 100 fixedly penetrating into the processing box 1;Wherein the bottom of processing box 1 is provided with a sleeve hole fixedly connected with the outside of gas pipe 100, and the front and rear side inner walls of processing box 1 are fixedly installed with the arc baffle 101 above gas pipe 100, and the bottom of processing box 1 and the top of propane deheavy tower top are rectangularly fixedly connected with four supports;

[0031] Fixed box 102 is fixedly installed at the top of processing box 1;

[0032] Water storage tank 2 is fixedly installed at the top of fixed box 102, and the inside of water storage tank 2 is filled with cold water, wherein the top right side of water storage tank 2 is provided with aeration hole for aeration;

[0033] PLC controller 3 is fixedly installed at the top of fixed box 102;

[0034] The water circulation heat exchange condensing assembly is fixedly installed in the processing box 1 and is in communication with the fixed box 102 and the water storage tank 2, and is electrically connected with the PLC controller 3; the water circulation heat exchange condensing assembly is used for, when the hot steam is generated by heating in the propane de-heavy tower and the light substance gas is floated and discharged to the processing box 1 through the gas outlet pipe 100, using the heat absorption and water circulation auxiliary cooling mode, absorbing heat of the hot steam to form condensate water droplets to collect the liquid high-purity propane in the processing box 1;

[0035] The water circulation heat exchange condensing assembly is fixedly installed in the processing box 1 and is in communication with the fixed box 102 and the water storage tank 2, and is electrically connected with the PLC controller 3; the water circulation heat exchange condensing assembly is used for, when the hot steam is generated by heating in the propane de-heavy tower and the light substance gas is floated and discharged to the processing box 1 through the gas outlet pipe 100, using the heat absorption and water circulation auxiliary cooling mode, absorbing heat of the hot steam to form condensate water droplets to collect the liquid high-purity propane in the processing box 1;

[0036] The propane liquid level detection and discharge assembly is installed on the outside of the processing box 1 and is electrically connected with the PLC controller 3; the propane liquid level detection and discharge assembly is used for detecting the liquid level of the collected high-purity propane, and is controlled by the PLC controller 3 to automatically discharge the collected high-purity propane for recycling when the liquid level reaches a preset high liquid level.

[0037] Specifically, the water circulation heat exchange condensing assembly comprises a plurality of Z-shaped hollow condensing pieces 402 fixedly connected at equal intervals between the inner walls of the front and rear sides of the treatment box 1, the top and bottom of the Z-shaped hollow condensing piece 402 are communicated and fixed with water pipes 403, the top ends of the plurality of water pipes 403 located above are communicated and fixed with the bottom of the fixed box 102, the right inner wall of the treatment box 1 is fixedly installed with a guide pipe 401, the bottom ends of the plurality of water pipes 403 located below are communicated and fixed with the guide pipe 401, the top of the fixed box 102 is fixedly installed with a first water pump 4 and a cold water machine 404, the water inlet of the first water pump 4 is communicated and fixed with the bottom of the water storage tank 2, the water outlet of the first water pump 4 is communicated and fixed with one end of the guide pipe 401, the water inlet of the cold water machine 404 and the top of the fixed box 102 are communicated and fixed with a first electromagnetic valve 405, the water outlet of the cold water machine 404 is communicated and fixed with a return water pipe, the top end of the return water pipe extends into the water storage tank 2, the first water pump 4, the cold water machine 404 and the first electromagnetic valve 405 are electrically connected with the PLC controller 3; the Z-shaped hollow condensing piece 402, the water pipe 403, the guide pipe 401, the first water pump 4, the cold water machine 404, the first electromagnetic valve 405 and the return water pipe are matched, in use, the PLC controller 3 is operated to control the first water pump 4, the first electromagnetic valve 405 and the cold water machine 404 to be turned on, the first water pump 4 draws the cold water in the water storage tank 2 and supplies it into the plurality of Z-shaped hollow condensing pieces 402 through the guide pipe 401 and the plurality of water pipes 403 located below in turn, the cold water is discharged into the fixed box 102 through the plurality of water pipes 403 located above, and then is discharged into the cold water machine 404 through the first electromagnetic valve 405, is cooled and cooled by the cold water machine 404, and then is returned to the water storage tank 2 through the return water pipe to be drawn and used again, so that the cold water circulates and flows in the plurality of Z-shaped hollow condensing pieces 402, when the propane is heated to produce hot steam in the propane stripping tower, the plurality of Z-shaped hollow condensing pieces 402 absorb heat and cool the propane, the circulating cold water cools the plurality of Z-shaped hollow condensing pieces 402, so as to ensure stable cooling effect, the heat of the hot steam is absorbed to form condensate water droplets, so that the high-purity propane in liquid form is collected in the treatment box 1, the heat exchange is converted into liquid propane, and the application of the cold water is stable and continuous.

[0038] Further, the supplementary water utilization assembly comprises a second water pump 5 fixedly installed at the top left side of the water storage tank 2 and having a water outlet connected with the inside thereof, a water supply hose is fixedly connected with the water inlet of the second water pump 5, a second electromagnetic valve 501 is fixedly connected with the top right side of the fixed box 102, a water supply pipe is fixedly connected with the top end of the second electromagnetic valve 501, and the second electromagnetic valve 501 and the second water pump 5 are electrically connected with the PLC controller 3; the second water pump 5, the second electromagnetic valve 501 and the water supply pipe are cooperated to connect the end of the water supply pipe with an external device for warm water utilization or a water terminal for daily use, connect the water supply hose with an external cold water source, utilize the PLC controller 3 to pre-set the control of the first electromagnetic valve 405 and the cold water machine 404 to be closed and the control of the second water pump 5 and the second electromagnetic valve 501 to be opened when switching the mode, and utilize the PLC controller 3 to pre-set the control of the first electromagnetic valve 405 and the cold water machine 404 to be opened and the control of the second water pump 5 and the second electromagnetic valve 501 to be closed when switching the mode again, since the cold water will form warm water when flowing in the Z-shaped hollow condensing sheet 402 and being affected by the high-temperature hot steam to absorb heat, the water supplied into the fixed box 102 is warm water, when switching the application mode by utilizing the PLC controller 3, the PLC controller 3 controls the first electromagnetic valve 405 and the cold water machine 404 to be closed and controls the second water pump 5 and the second electromagnetic valve 501 to be opened, at this time, the warm water in the fixed box 102 is discharged in sequence through the second electromagnetic valve 501 and the water supply pipe to be utilized by the warm water utilization device or personnel, and the second water pump 5 is opened to draw the external cold water through the water supply hose to be supplemented into the water storage tank 2 to reduce the water shortage phenomenon, when switching the mode again, the PLC controller 3 controls the first electromagnetic valve 405 and the cold water machine 404 to be opened and controls the second water pump 5 and the second electromagnetic valve 501 to be closed, so that the effect of switching the heat energy combined with heat exchange to another mode utilization is realized, and the use flexibility is improved.

[0039] Further, the propane liquid level detection and discharge assembly comprises a third electromagnetic valve 601 fixedly connected to the right bottom of the treatment box 1, a conveying hose is fixedly connected to the right end of the third electromagnetic valve 601, the inner wall of the bottom of the treatment box 1 is provided as an inclined surface, a liquid level sensor 6 is fixedly installed on the right side and the bottom right side of the treatment box 1, the detection ends of the two liquid level sensors 6 extend into the treatment box 1, the height of the liquid level sensor 6 on the right side is lower than the height of the top end of the gas outlet pipe 100, and the two liquid level sensors 6 and the third electromagnetic valve 601 are electrically connected with the PLC controller 3; the third electromagnetic valve 601, the conveying hose and the liquid level sensor 6 are matched, with the collection of high-purity propane, the liquid level of the propane gradually increases, when the liquid level detected by the upper liquid level sensor 6 reaches the position of the upper liquid level sensor 6, the upper liquid level sensor 6 transmits an opening discharge signal to the PLC controller 3, at this time, the PLC controller 3 controls the third electromagnetic valve 601 to open, at this time, the collected high-purity propane is discharged in sequence through the third electromagnetic valve 601 and the conveying hose, one end of the conveying hose is connected to an external high-purity propane collection tank in advance, with the discharge of the high-purity propane, when the liquid level decreases to the position of the lower liquid level sensor 6, the lower liquid level sensor 6 transmits a stop discharge signal to the PLC controller 3, at this time, the PLC controller 3 controls the third electromagnetic valve 601 to close, and the discharge work is stopped, thereby achieving the effect that the collected high-purity propane is automatically discharged and recovered when the liquid level of the high-purity propane collected by heat exchange conversion is high.

[0040] Further, the material of the water storage tank 2 is copper, and a plurality of heat dissipation fins are fixedly installed on the four sides of the water storage tank 2, and the heat dissipation fins are arranged to further dissipate heat from the cold water through the water storage tank 2.

[0041] The use method of the embodiment is that: when the heat exchanger for the propane deheavy column is used, the PLC controller 3 is preprogrammed to set two modes of application, one mode of application is to control the first electromagnetic valve 405 and the water chiller 404 to be opened, and control the second water pump 5 and the second electromagnetic valve 501 to be closed, and when the other mode of application is switched to, the first electromagnetic valve 405 and the water chiller 404 are controlled to be closed, and the second water pump 5 and the second electromagnetic valve 501 are controlled to be opened. When used normally, the PLC controller 3 controls the first water pump 4, the first electromagnetic valve 405 and the water chiller 404 to be opened, the first water pump 4 draws the cold water in the water storage tank 2 and supplies it into the plurality of Z-shaped hollow condensing pieces 402 through the conduit 401 and the plurality of water pipes below in sequence, the cold water is discharged into the fixed box 102 through the plurality of water pipes above, and then is discharged into the water chiller 404 through the first electromagnetic valve 405, cooled and then returned to the water storage tank 2 through the water return pipe to be drawn and used again, so as to realize the effect of circulating flow of the cold water in the plurality of Z-shaped hollow condensing pieces 402. When the propane deheavy column is heated to produce hot steam to make the light substance gas float and be discharged to the treatment tank 1 through the gas outlet pipe 100, the plurality of Z-shaped hollow condensing pieces 402 absorb heat from the propane to cool it, and the circulating cold water cools the plurality of Z-shaped hollow condensing pieces 402 to ensure stable cooling effect. The heat exchange is converted into liquid propane to be collected in the treatment tank 1, and the effect of heat exchange conversion into liquid propane collection is realized. The cooling mode of the cold water circulation and the water chiller 404 is used to reduce the phenomenon of unstable subsequent heat exchange caused by high temperature of the Z-shaped hollow condensing piece 402, and improve the application stability of the cold water.

[0042] The end of the water supply pipe is connected to an external device for warm water or domestic water terminal, and the water supply hose is connected to an external cold water source. When the cold water flows in the Z-shaped hollow condensing piece 402, it is affected by the high-temperature hot steam to absorb heat and form warm water, which is supplied into the fixed box 102. When the mode needs to be switched for warm water use, the external remote controller is used to control the wireless remote switch to control the PLC controller 3 to switch to another application mode. At this time, the PLC controller 3 controls the first electromagnetic valve 405 and the water chiller 404 to be closed, and controls the second water pump 5 and the second electromagnetic valve 501 to be opened. At this time, the warm water in the fixed box 102 is discharged in sequence through the second electromagnetic valve 501 and the water supply pipe for warm water use equipment or personnel to use. When the second water pump 5 is opened, the external cold water is drawn through the water supply hose and supplemented into the water storage tank 2 to reduce the water shortage phenomenon. When the mode is switched again after application, the PLC controller 3 controls the first electromagnetic valve 405 and the water chiller 404 to be opened, and controls the second water pump 5 and the second electromagnetic valve 501 to be closed, so as to form the effect of cold water circulation and cooling of the circulating cold water again. The effect of heat energy switching to another mode for external discharge use is realized, and the use flexibility is improved.

[0043] Pre-set in the receiving high liquid level value of the upper liquid level sensor 6, the PLC controller 3 controls the third electromagnetic valve 601 to open, and set to receive the low liquid level value of the lower liquid level sensor 6, the third electromagnetic valve 601 is controlled to close, with the collection of high-purity propane, the propane liquid level gradually increases, the upper liquid level sensor 6 detects the liquid level reaches its position and transmits to the PLC controller 3 to open the drain signal, at this time the PLC controller 3 controls the third electromagnetic valve 601 to open, at this time the collected high-purity propane is discharged in turn through the third electromagnetic valve 601 and the delivery hose, the end of the delivery hose is connected to the external high-purity propane collection tank in advance, with the discharge of high-purity propane, the liquid level is lowered to the position of the lower liquid level sensor 6, the lower liquid level sensor 6 transmits to the PLC controller 3 to stop the drain signal, at this time the PLC controller 3 controls the third electromagnetic valve 601 to close, stop the drain work, realize the effect of automatic discharge and recovery when the high-purity propane liquid level collected by the heat exchange conversion is high, without additional separate operation to discharge and recover, improve the degree of automation and convenience.

[0044] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A heat exchanger for propane depropanizer column comprising a treatment box (1), characterized in that: The utility model relates to a kind of propane recovery device, including: Processing box (1) is fixedly installed at the top of propane deheavy column, the top of the propane deheavy column is connected with the outlet pipe (100) fixedly penetrated into processing box (1); Fixed box (102) is fixedly installed at the top of processing box (1); Water storage tank (2) is fixedly installed at the top of fixed box (102), the inside of the water storage tank (2) is filled with cold water; PLC controller (3) is fixedly installed at the top of fixed box (102); Water circulation heat exchange condensing assembly is fixedly installed in processing box (1) and is connected with fixed box (102) and water storage tank (2), and the water circulation heat exchange condensing assembly is electrically connected with PLC controller (3); Supplementing and draining utilization assembly is installed on water storage tank (2) and fixed box (102) and is electrically connected with PLC controller (3); Propane liquid level detection discharge assembly is installed on the outside of processing box (1) and is electrically connected with PLC controller (3).

2. A heat exchanger for a depropanizer column according to claim 1, characterized in that: The water circulation heat exchange condensing assembly includes a plurality of Z-shaped hollow condensing pieces (402) fixedly connected at equal intervals between the inner walls of the front and rear sides of processing box (1), the top and bottom of the Z-shaped hollow condensing piece (402) are connected with water pipes (403), the top ends of the upper water pipes (403) are connected with the bottom of fixed box (102), a conduit (401) is fixedly installed on the right inner wall of processing box (1), the bottom ends of the lower water pipes (403) are connected with the conduit (401), a first water pump (4) and a cold water machine (404) are fixedly installed on the top of fixed box (102), the water inlet of the first water pump (4) is connected with the bottom of water storage tank (2), the water outlet of the first water pump (4) is connected with one end of the conduit (401), the water inlet of the cold water machine (404) is connected with the top of fixed box (102) through a first electromagnetic valve (405), the water outlet of the cold water machine (404) is connected with a backwater pipe, the top end of the backwater pipe extends into water storage tank (2), the first water pump (4), the cold water machine (404) and the first electromagnetic valve (405) are electrically connected with PLC controller (3).

3. A heat exchanger for use in a depropanizer column as defined in claim 1, wherein: The supplementing and draining utilization assembly includes a second water pump (5) fixedly installed on the top left side of water storage tank (2) and connected with the inside through the water outlet, the water inlet of the second water pump (5) is connected with a water supply hose, the top right side of fixed box (102) is connected with a second electromagnetic valve (501) through a water supply pipe, the top end of the second electromagnetic valve (501) is connected with a water supply pipe, the second electromagnetic valve (501) and the second water pump (5) are electrically connected with PLC controller (3).

4. A heat exchanger for use in a depropanizer column as defined in claim 1, wherein: The propane liquid level detection discharge assembly comprises a third electromagnetic valve (601) communicated and fixed at the bottom right of the treatment box (1), a conveying hose is communicated and fixed at the right end of the third electromagnetic valve (601), the inner wall of the bottom of the treatment box (1) is provided as an inclined surface, liquid level sensors (6) are fixedly installed on the right side and the bottom right of the treatment box (1), the detection ends of the two liquid level sensors (6) extend into the treatment box (1), the height of the liquid level sensor (6) on the right side is lower than the height of the top end of the gas outlet pipe (100), and the two liquid level sensors (6) and the third electromagnetic valve (601) are electrically connected with the PLC controller (3).

5. A heat exchanger for propane depropanizer column according to claim 1, characterized in that: The top of the PLC controller (3) is fixedly connected with a wireless remote control switch (301) and is electrically connected with the wireless remote control switch (301), and the wireless remote control switch (301) is matched with an external remote controller.

6. A heat exchanger for propane depropanizer column according to claim 1, characterized in that: The arc-shaped baffle (101) located above the gas outlet pipe (100) is fixedly installed between the inner walls of the front and rear sides of the treatment box (1), and four supports are fixedly connected in a rectangular shape between the bottom of the treatment box (1) and the top of the propane de-weight tower.

7. A heat exchanger for use in a depropanizer column as defined in claim 1, wherein: The material of the water storage tank (2) is copper, and a plurality of heat dissipation fins are fixedly installed on the four sides of the water storage tank (2).

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