Triethylamine recovery equipment with waste heat utilization structure

Abstract

The utility model discloses triethylamine recovery equipment with a waste heat utilization structure, which comprises a triethylamine recovery body, the triethylamine recovery body is provided with a cooling system, the cooling system comprises an inlet and an outlet, and a waste heat collection component is communicated between the outlet and the inlet; the waste heat collecting assembly comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is communicated with the outlet, and the liquid outlet pipe is communicated with the inlet; by the adoption of the structure, waste heat of the cooling system is collected and reused, the heat utilization rate is increased, and the triethylamine recycling device is suitable for recycling triethylamine.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and particularly relates to a triethylamine recovery device with a waste heat utilization structure. Background Art

[0002] Triethylamine, an organic compound, is a colorless transparent liquid with a strong ammonia odor and slightly fumes in the air. It is soluble in water and can be soluble in ethanol and ether. The aqueous solution is weakly alkaline, flammable, and explosive. It is toxic and highly irritating. Industrially, it is mainly used as a solvent, curing agent, catalyst, polymerization inhibitor, preservative, and synthetic dye, etc.

[0003] In the prior art, in the process of preparing alkyl ketene dimer, triethylamine reacts with acyl chloride to form triethylamine hydrochloride. A quantitative amount of alkali solution is slowly added dropwise to the aqueous solution containing triethylamine hydrochloride for reaction. After the reaction is completed, it is allowed to stand for layering. The upper organic phase is the triethylamine layer, and the lower layer is the aqueous phase. After the aqueous phase is separated, an alkaline substance is added to the kettle, and then triethylamine is recovered by distillation. For example, a safety device for recovering triethylamine from triethylamine wastewater disclosed in the Chinese utility model patent authorization publication number CN221254009U, which includes a waste liquid tank system, a gas circuit system, a cooling system, a triethylamine recovery storage tank system, and a DCS control system; the waste liquid tank system includes a waste liquid tank main body and a heat medium jacket; the gas circuit system includes a heat exchange coil, a waste liquid tank bottom gas coil, and a connecting pipe; the cooling system includes a primary cooling system and a secondary cooling system for condensing triethylamine and water into a liquid; the triethylamine recovery storage tank system includes a triethylamine recovery storage tank main body communicated with the cooling system, with an exhaust pipe port at the top and a triethylamine discharge port at the bottom; the DCS control system includes a liquid level sensor, a temperature sensor, and a first pH sensor arranged in the waste liquid tank, and a second pH sensor arranged in the cooling system. Another example is a triethylamine recovery device disclosed in the Chinese utility model patent authorization publication number CN210340400U, which includes an extraction kettle and a stirring device. The top of the extraction kettle is respectively provided with a liquid feeding port and a solid feeding port. The bottom of the extraction kettle is provided with a discharge pipeline, a sight glass is arranged in the discharge pipeline, a discharge valve is arranged on the discharge pipeline, a jacket is arranged on the outer wall of the extraction kettle, the top of the extraction kettle is communicated with a steam outlet pipe, the steam outlet pipe is communicated with an inclined condensation pipe, the outside of the condensation pipe is wrapped with a cold water pipeline, and the lower end of the condensation pipe is communicated with a receiving tank. The stirring device includes a motor, a rotating rod, a spiral blade, and an arc blade. And a triethylamine recovery kettle disclosed in the Chinese utility model patent authorization publication number CN215312252U, which includes a recovery kettle inner liner, and an outer sleeve is detachably connected to the outside of the recovery kettle inner liner. The inside of the outer sleeve is a hollow structure. An opening is provided at the top of the outer sleeve and the size of the opening is the same as the diameter of the recovery kettle inner liner. The recovery kettle inner liner is inserted into the outer sleeve.

[0004] As can be seen from the above analysis, the waste heat of the cooling system in the triethylamine recovery device is not recovered and utilized, reducing the heat utilization rate. Summary of the Invention

[0005] The purpose of the present utility model is to provide a triethylamine recovery device with a waste heat utilization structure, aiming to solve the problem that the waste heat of the cooling system in the triethylamine recovery device pointed out in the background technology is not recovered and utilized, reducing the heat utilization rate.

[0006] To achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] A triethylamine recovery device with a waste heat utilization structure includes a triethylamine recovery body. The triethylamine recovery body is provided with a cooling system. The cooling system includes an inlet and an outlet, and a waste heat collection component is communicated between the outlet and the inlet. The waste heat collection component includes a liquid inlet pipe and a liquid outlet pipe. The liquid inlet pipe is communicated with the outlet, and the liquid outlet pipe is communicated with the inlet.

[0008] As a limitation, the waste heat collection component further includes a heat dissipation pipe and several recovery groups. One end of the heat dissipation pipe is communicated with the liquid inlet pipe, and the other end of the heat dissipation pipe is communicated with the liquid outlet pipe. Each of the recovery groups is arranged at intervals along the length direction of the heat dissipation pipe.

[0009] As another limitation, the recovery group includes an exchange box. A liquid collection pipe is provided at the bottom of the exchange box. A three-way switch is provided at the end of the liquid collection pipe away from the exchange box. One end of the three-way switch is communicated with the liquid collection pipe, one end of the three-way switch is communicated with a liquid supply pipe, and the other end of the three-way switch is communicated with a liquid discharge pipe.

[0010] As another limitation, the outer surface of the exchange box is coated with a heat insulation layer.

[0011] As another limitation, the recovery group further includes a heat dissipation plate and a heat conduction plate. One end of the heat conduction plate is connected to the heat dissipation pipe, the other end of the heat conduction plate is connected to the heat dissipation plate, and the end of the heat dissipation plate away from the heat conduction plate is connected to the exchange box.

[0012] As another limitation, a first temperature sensor is provided between adjacent recovery groups, and the first temperature sensor is connected to the heat dissipation pipe.

[0013] As another limitation, a second temperature sensor is provided in the exchange box.

[0014] As another limitation, a third temperature sensor is provided on the liquid inlet pipe, and a fourth temperature sensor is provided on the liquid outlet pipe.

[0015] As another limitation, a circulation pump is connected between the liquid outlet pipe and the inlet. The inlet of the circulation pump is connected to the liquid outlet pipe, and the outlet of the circulation pump is connected to the inlet.

[0016] Compared with the prior art, the technical progress achieved by the present utility model lies in:

[0017] The cold zone system of the present utility model includes an inlet and an outlet. A waste heat collection component is connected between the outlet and the inlet. The waste heat collection component includes a liquid inlet pipe and a liquid outlet pipe. The liquid inlet pipe is connected to the outlet, and the liquid outlet pipe is connected to the inlet. The waste heat collection component is used to collect waste heat for reuse, improving the heat utilization rate and solving the problem that the waste heat of the cooling system in the triethylamine recovery device pointed out in the background art is not recovered and utilized, reducing the heat utilization rate. In summary, with the above structure, the present utility model collects and reuses the waste heat of the cooling system, improves the heat utilization rate, and is applicable to triethylamine recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model.

[0019] In the drawings:

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a cross-sectional view of the liquid inlet pipe, liquid outlet pipe, exchange box and heat dissipation pipe of the embodiment of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the liquid inlet pipe, heat dissipation pipe, heat dissipation plate, heat conduction plate and liquid outlet pipe of the embodiment of the present utility model;

[0023] Figure 4 is a schematic structural diagram of the heat dissipation pipe, heat dissipation plate and heat conduction plate of the embodiment of the present utility model;

[0024] Figure 5 is a schematic structural diagram of the liquid inlet pipe, exchange box, liquid collecting pipe and three-way switch of the embodiment of the present utility model;

[0025] Figure 6 is a schematic structural diagram of the exchange box, heat dissipation pipe and heat dissipation plate of the embodiment of the present utility model;

[0026] Figure 7 is a schematic structural diagram of the liquid inlet pipe, exchange box, three-way switch, heat dissipation pipe and heat dissipation plate of the embodiment of the present utility model;

[0027] Figure 8 is a cross-sectional view of the heat insulation layer and the exchange box of the embodiment of the present utility model;

[0028] Figure 9 This is a schematic structural diagram of the thermal insulation layer, exchange box, heat dissipation pipe and heat dissipation plate in the embodiment of the present utility model.

[0029] Labeled components: 1 - waste heat collection component, 2 - liquid inlet pipe, 3 - liquid outlet pipe, 4 - heat dissipation pipe, 5 - recovery group, 501 - exchange box, 502 - liquid collection pipe, 503 - three-way switch, 504 - liquid supplement pipe, 505 - liquid discharge pipe, 506 - heat dissipation plate, 507 - heat conduction plate, 6 - thermal insulation layer, 7 - temperature sensor 1, 8 - temperature sensor 2, 9 - temperature sensor 3, 10 - temperature sensor 4, 11 - circulation pump. Specific embodiments

[0030] The following is a description of the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0031] Embodiment An ethylamine recovery device with a waste heat utilization structure

[0032] This embodiment discloses an ethylamine recovery device with a waste heat utilization structure, as Figure 1As shown, it includes a triethylamine recovery body (not shown in the figure), and the triethylamine recovery body is equipped with a cooling system (not shown in the figure). The triethylamine recovery body and the cooling system can adopt the triethylamine recovery body (waste liquid pipe system, gas path system, triethylamine recovery storage tank system, and DCS control system) and the cooling system in a safety device for recovering triethylamine from triethylamine wastewater with the Chinese Utility Model Patent Authorization Publication No. CN221254009U. It can also adopt the extraction kettle and the cold water pipe (cooling system) in a triethylamine recovery device with the Chinese Utility Model Patent Authorization Publication No. CN210340400U. It can also adopt the recovery kettle inner liner, outer sleeve, and cooling system (water inlet pipe, water outlet pipe) in a triethylamine recovery kettle with the Chinese Utility Model Patent Authorization Publication No. CN215312252U. The triethylamine recovery body and the cold zone system can also adopt devices of other existing technologies. The triethylamine recovery body and the cold zone system belong to the common knowledge of those skilled in the art and will not be described in detail. The cooling system includes an inlet and an outlet. A coolant circulates inside the cooling system. The coolant can be a liquid, and the coolant can also be a gas. The coolant absorbs heat to condense the gas into a liquid. The temperature of the coolant at the outlet is higher than that at the inlet. A waste heat collection component 1 is connected between the outlet and the inlet. The waste heat collection component 1 includes a liquid inlet pipe 2 and a liquid outlet pipe 3. The liquid inlet pipe 2 can be fixedly connected to the cold zone system by welding, and the liquid inlet pipe 2 can also be flange-connected to the cold zone system. The liquid inlet pipe 2 is connected to the outlet. The liquid outlet pipe 3 can be fixedly connected to the cold zone system by welding, and the liquid outlet pipe 3 can also be flange-connected to the cold zone system. The liquid outlet pipe 3 is connected to the inlet. The waste heat collection component 1 is used to collect the heat of the coolant, so that the temperature of the coolant flowing out of the liquid outlet pipe 3 is lower than that of the coolant in the liquid inlet pipe 2. The waste heat collection component 1 re-uses the collected heat of the coolant, improving the heat utilization rate and solving the problem that the waste heat of the cooling system in the triethylamine recovery device in the background technology is not recovered and utilized, reducing the heat utilization rate. When in use, first, the coolant in the cooling system absorbs heat and flows out from the outlet. Then, the coolant that has absorbed heat flows through the liquid inlet pipe 2 in the waste heat collection component 1, and its temperature is reduced through heat exchange. The heat is collected in the waste heat collection component 1 for re-use. Finally, the coolant with reduced temperature flows out through the liquid outlet pipe 3 and enters the cold zone system through the inlet to form a cycle. Thus, the advantage of this embodiment is that with the above settings, the heat utilization rate is improved.

[0033] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown in the figure, the waste heat collection component 1 further includes a heat dissipation pipe 4 and several recovery groups 5. The heat dissipation pipe 4 is made of a metal with good heat dissipation performance, such as copper, aluminum, silver, etc. One end of the heat dissipation pipe 4 can be fixedly connected to the liquid inlet pipe 2 by welding, and the heat dissipation pipe 4 can also be integrally formed with the liquid inlet pipe 2. The heat dissipation pipe 4 communicates with the liquid inlet pipe 2. The other end of the heat dissipation pipe 4 can be fixedly connected to the liquid outlet pipe 3 by welding, and the heat dissipation pipe 4 can also be integrally formed with the liquid outlet pipe 3. The heat dissipation pipe 4 communicates with the liquid outlet pipe 3. Each recovery group 5 is arranged at intervals along the length direction of the heat dissipation pipe 4. The arrangement of multiple recovery groups 5 can facilitate the control of the temperature of the high-temperature coolant flowing in the heat dissipation pipe 4, that is, the high-temperature coolant in the heat dissipation pipe 4 can recover heat multiple times, improving the heat utilization rate and gradually reducing the temperature of the high-temperature coolant to reach the temperature of the coolant required to enter the cooling system; The recovery group 5 includes an exchange box 501. The bottom of the exchange box 501 is fixedly connected to a liquid collecting pipe 502 by welding. The end of the liquid collecting pipe 502 away from the exchange box 501 is threadedly connected to a three-way switch 503. One end of the three-way switch 503 communicates with the liquid collecting pipe 502. One end of the three-way switch 503 is threadedly connected to a liquid supplement pipe 504. The liquid supplement pipe 504 communicates with one end of the three-way switch 503. The liquid supplement pipe 504 is externally connected to a water source through a water pump. The water pump inputs water into the exchange box 501 through the liquid supplement pipe 504. The water exchanges heat with the high-temperature coolant in the heat dissipation pipe 4 in the exchange box 501. The water absorbs the heat of the high-temperature coolant, reducing the temperature of the high-temperature coolant and increasing the temperature of the water. The other end of the three-way switch 503 is threadedly connected to a drain pipe 505. The three-way switch 503 communicates with the drain pipe 505. The drain pipe 505 is used to discharge the water with increased temperature in the exchange box 501. The water with increased temperature is reused, improving the utilization rate of waste heat. The use of the three-way switch 503 belongs to the common knowledge of those skilled in the art and will not be described in detail. The outer surface of the exchange box 501 is covered with a heat insulation layer 6. The heat insulation layer 6 can reduce heat loss and improve the heat utilization rate; The recovery group 5 further includes a heat dissipation plate 506 and a heat conduction plate 507. One end of the heat conduction plate 507 can be fixedly connected to the heat dissipation pipe 4 by welding, and the heat conduction plate 507 can also be integrally formed with the heat dissipation pipe 4. The other end of the heat conduction plate 507 can be fixedly connected to the heat dissipation plate 506 by welding, and the heat conduction plate 507 can also be integrally formed with the heat dissipation plate 506. The end of the heat dissipation plate 506 away from the heat conduction plate 507 can be fixedly connected to the exchange box 501 by welding, and the heat dissipation plate 506 can also be connected to the exchange box 501 by bolts. The settings of the heat dissipation plate 506 and the heat conduction plate 507 increase the heat dissipation area of the heat dissipation pipe 4 and the heat dissipation speed of the heat dissipation pipe 4. The connection methods between the heat dissipation plate 506, the heat conduction plate 507 and the heat dissipation pipe 4 can also adopt other connection methods in the prior art, such as clamping, plugging, etc. The corresponding connection structures belong to the common knowledge of those skilled in the art and will not be described in detail.

[0034] Such as Figure 1, Figure 2 , Figure 5 As shown in Figure 2 and Figure 5 , a first temperature sensor 7 is provided between adjacent recovery groups 5. The first temperature sensor 7 is connected to the heat dissipation pipe 4. The first temperature sensor 7 can detect the temperature of the coolant in the heat dissipation pipe 4 after being recovered by the previous recovery group 5, that is, the temperature of the coolant entering the next recovery group 5. When the temperature of the coolant entering the next recovery group 5 is higher than the temperature of the coolant entering the cold zone system, the heat of the coolant is further collected through heat exchange in the next recovery group 5 to further cool the coolant. When the temperature of the coolant entering the next recovery group 5 is equal to or lower than the temperature of the coolant entering the cooling system, the next recovery group 5 can directly flow through the heat dissipation pipe 4 in the recovery group 5 without heat exchange and enter the cooling system. The first temperature sensor 7 facilitates detecting the temperature of the coolant entering and leaving the recovery group 5; a second temperature sensor 8 is respectively provided in each exchange box 501. The second temperature sensor 8 respectively detects the temperature of the water in the corresponding exchange box 501. When the water temperature in the exchange box 501 is equal to the temperature of the coolant entering the exchange box 501, the operator connects the three-way switch 503 and the drain pipe 505 to discharge the high-temperature water in the exchange box 501 through the drain pipe 505 for reuse. The reuse is carried out according to the actual situation, such as preheating, etc. After the high-temperature water in the exchange box 501 is discharged, the operator connects the three-way switch 503 and the liquid supplement pipe 504, and pumps low-temperature water into the exchange box 501 through a water pump for waste heat collection; this setting facilitates detecting the water temperature in the exchange box 501 to facilitate timely water replacement; a third temperature sensor 9 is provided on the liquid inlet pipe 2. The third temperature sensor 9 facilitates detecting the temperature of the coolant that has absorbed heat to facilitate controlling the temperature of the water entering the exchange box 501. The initial temperature of the water in the exchange box 501 is lower than the temperature detected by the third temperature sensor 9. A fourth temperature sensor 10 is provided on the liquid outlet pipe 3. The fourth temperature sensor 10 facilitates detecting the temperature of the coolant after waste heat collection. The temperature detected by the fourth temperature sensor 10 is lower than the temperature detected by the third temperature sensor 9.

[0035] As Figure 1 , Figure 5 As shown in Figure 1 and Figure 5 , a circulation pump 11 is connected between the liquid outlet pipe 3 and the inlet. The inlet of the circulation pump 11 can be threadedly connected to the liquid outlet pipe 3, and the inlet of the circulation pump 11 can also be flange-connected to the liquid outlet pipe 3. The outlet of the circulation pump 11 can be threadedly connected to the inlet, and the outlet of the circulation pump 11 can also be flange-connected to the inlet. The circulation pump 11 is externally powered. The circulation pump provides power for the coolant flowing in the cooling system and the heat dissipation pipe 4 to enable the coolant to flow smoothly in the cold zone system and the heat dissipation pipe 4.

[0036] The working principle of the embodiment of the present utility model is as follows:

[0037] During use, first, the coolant in the cooling system absorbs heat and flows out from the outlet. After that, the coolant that has absorbed heat flows through the inlet pipe 2 in the waste heat collection component 1, and through heat exchange, the temperature of the coolant that has absorbed heat is reduced. The heat is collected in the waste heat collection component 1 for reuse. Finally, the coolant with reduced temperature flows out through the outlet pipe 3 and enters the cold zone system through the inlet to form a cycle.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A triethylamine recovery device with a waste heat utilization structure, comprising a triethylamine recovery body, wherein the triethylamine recovery body is provided with a cooling system, wherein the cooling system comprises an inlet and an outlet, and wherein: A waste heat collection component (1) is connected between the outlet and the inlet; the waste heat collection component (1) comprises a liquid inlet pipe (2) and a liquid outlet pipe (3); the liquid inlet pipe (2) is connected to the outlet, and the liquid outlet pipe (3) is connected to the inlet.

2. The triethylamine recovery equipment with a waste heat utilization structure according to claim 1, characterized in that: The waste heat collection assembly (1) further comprises a heat dissipation pipe (4) and a plurality of recovery groups (5); one end of the heat dissipation pipe (4) is connected to the liquid inlet pipe (2), and the other end of the heat dissipation pipe (4) is connected to the liquid outlet pipe (3); and the recovery groups (5) are arranged at intervals along the length direction of the heat dissipation pipe (4).

3. The triethylamine recovery device with a waste heat utilization structure according to claim 2, characterized in that: The recovery group (5) comprises an exchange box (501), a liquid collecting pipe (502) is provided at the bottom of the exchange box (501), a three-way switch (503) is provided at the end of the liquid collecting pipe (502) away from the exchange box (501), one end of the three-way switch (503) is connected to the liquid collecting pipe (502), one end of the three-way switch (503) is connected to the liquid replenishing pipe (504), and the other end of the three-way switch (503) is connected to the liquid draining pipe (505).

4. The triethylamine recovery device with a waste heat utilization structure according to claim 3, characterized in that: The outer surface of the exchange box (501) is covered with a thermal insulation layer (6).

5. The triethylamine recovery equipment with waste heat utilization structure according to claim 3 is characterized in that: The recovery group (5) further comprises a heat sink (506) and a heat conducting plate (507), one end of the heat conducting plate (507) being connected to the heat pipe (4), the other end of the heat conducting plate (507) being connected to the heat sink (506), and the end of the heat sink (506) away from the heat conducting plate (507) being connected to the exchange box (501).

6. The triethylamine recovery device with a waste heat utilization structure according to claim 2, characterized in that: A temperature sensor (7) is provided between adjacent recovery groups (5), and the temperature sensor (7) is connected to the heat dissipation pipe (4).

7. The triethylamine recovery device with a waste heat utilization structure according to claim 3, characterized in that: The exchange box (501) is provided with a second temperature sensor (8).

8. The triethylamine recovery equipment with a waste heat utilization structure according to claim 1, characterized in that: The liquid inlet pipe (2) is provided with a temperature sensor three (9), and the liquid outlet pipe (3) is provided with a temperature sensor four (10).

9. The triethylamine recovery equipment with a waste heat utilization structure according to claim 1, characterized in that: A circulation pump (11) is connected between the liquid outlet pipe (3) and the inlet, the inlet of the circulation pump (11) is connected to the liquid outlet pipe (3), and the outlet of the circulation pump (11) is connected to the inlet.

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