NMP heat exchange module

Abstract

The utility model belongs to the technical field of NMP recovery equipment, and particularly discloses an NMP heat exchange module which comprises a first gas-liquid heat exchanger and a circulation heat conduction mechanism, a condensation pipeline mechanism is installed in the first gas-liquid heat exchanger, and the two ends of the condensation pipeline mechanism both penetrate to the outside of the first gas-liquid heat exchanger. The surface of the first gas-liquid heat exchanger is fixedly connected with an integrated box; the circulating heat conduction mechanism not only can cool the NMP-containing gas in advance before the first gas-liquid heat exchanger cools the NMP-containing gas so as to reduce the burden of the first gas-liquid heat exchanger, but also can heat the NMP-containing gas by using the heated cooling water, so that the temperature difference between the NMP-containing gas and the interior of the drying oven can be reduced, the burden of the drying oven for heating the flowing gas is reduced, and the service life of the drying oven is prolonged. And therefore, a good energy-saving effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to NMP recycling equipment technical field, concretely relates to a kind of NMP heat exchange module. BACKGROUND

[0002] NMP, full name N-methyl pyrrolidone, is an organic compound, chemical formula is C5H9NO.In pole coating process, NMP solution is used to dissolve the adhesive in pole slurry, so that adhesive is evenly distributed on pole, to ensure pole quality.Currently, NMP solution after pole coating needs to be sent into oven and dried by hot air quickly.

[0003] In the process of drying NMP solution by hot air, part of NMP solvent will also evaporate, and the drying waste gas containing vaporized NMP solvent will not only pollute the surrounding environment when discharged, but also waste high-value NMP solvent.However, the existing vaporized NMP recovery equipment not only has complex gas-liquid pipeline arrangement, but also needs to occupy more space, and has high power consumption, resulting in high recovery cost of vaporized NMP. SUMMARY

[0004] The utility model aims at solving the shortcomings in the prior art, and provides a kind of NMP heat exchange module.

[0005] To achieve the above purpose, the utility model provides a kind of NMP heat exchange module, including first gas-liquid heat exchanger and circulating heat conduction mechanism, the inside of first gas-liquid heat exchanger is installed with condensing pipeline mechanism, both ends of condensing pipeline mechanism are penetrated to the outside of first gas-liquid heat exchanger, the surface of first gas-liquid heat exchanger is fixedly connected with integrated tank.

[0006] In the above technical scheme, further, the circulating heat conduction mechanism includes second gas-liquid heat exchanger and third gas-liquid heat exchanger, the second gas-liquid heat exchanger and third gas-liquid heat exchanger are symmetrically distributed on the two sides of first gas-liquid heat exchanger, both ends of condensing pipeline mechanism are penetrated out of the outside of second gas-liquid heat exchanger and third gas-liquid heat exchanger respectively, the second gas-liquid heat exchanger and third gas-liquid heat exchanger are fixedly connected and communicated with two gas guide pipes, one surface of the gas guide pipe is embedded and installed and communicated with infusion pump.

[0007] In the above technical scheme, further, the condensing pipeline mechanism includes heat conduction pipe, the heat conduction pipe is fixedly connected to one end of second gas-liquid heat exchanger, one end of heat conduction pipe is sequentially penetrated through second gas-liquid heat exchanger, first gas-liquid heat exchanger and third gas-liquid heat exchanger and extended to the outside of third gas-liquid heat exchanger, the heat conduction pipe is fixedly connected and communicated with drainage pipe at the lowest point in the inside of first gas-liquid heat exchanger, one end of drainage pipe is sequentially penetrated through first gas-liquid heat exchanger and integrated tank and extended to the outside of integrated tank.

[0008] In the above technical solution, further, the partial cross-sectional shape of the heat conduction pipe arranged inside the second gas-liquid heat exchanger, the first gas-liquid heat exchanger and the third gas-liquid heat exchanger is serpentine.

[0009] In the above technical solution, further, the drain pipe gradually inclines downward from inside the integrated box to outside the integrated box, and the lowest part of the drain pipe is arranged outside the integrated box.

[0010] In the above technical solution, further, the number of the communication parts of the drain pipe with the heat conduction pipe is not less than five, and the drain pipe is below the heat conduction pipe.

[0011] In the above technical solution, further, the surface of the drain pipe is embeddedly installed and communicated with an electric valve, and the electric valve is arranged outside the integrated box.

[0012] In the above technical solution, further, the number of the heat conduction pipes is not less than five, and the distance between two adjacent heat conduction pipes is the same.

[0013] In the above technical solution, further, the condensing pipeline mechanism further comprises two gas shunt valves fixedly connected with the integrated box, and the heat conduction pipe is fixedly connected and communicated between the two gas shunt valves.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The circulating heat conduction mechanism can not only cool the NMP-containing gas in advance before the first gas-liquid heat exchanger cools the NMP-containing gas, so as to reduce the burden of the first gas-liquid heat exchanger, but also heat the NMP-removed gas by using the heated cooling water, which can reduce the temperature difference between the NMP-removed gas and the inside of the oven, so as to reduce the burden of the oven for heating the flowing gas, thereby achieving good energy-saving effect.

[0016] The design of integrating the first gas-liquid heat exchanger, the condensing pipeline mechanism and the circulating heat conduction mechanism inside the integrated box can reduce the overall occupied space of the NMP heat exchange module, so as to meet the demand of the NMP heat exchange module operating in a narrow environment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure schematic view of the NMP heat exchange module overall structure is provided for the utility model;

[0018] Figure 2 A sectional view schematic view of the NMP heat exchange module overall structure is provided for the utility model;

[0019] Figure 3 A structure schematic view of the NMP heat exchange module local structure is provided for the utility model;

[0020] Figure 4 The utility model provides a structure schematic drawing of condensing pipeline mechanism in NMP heat exchange module.

[0021] In the drawing: 100, first gas-liquid heat exchanger; 200, condensing pipeline mechanism; 210, heat conduction pipe; 220, liquid discharge pipe; 230, electric valve; 240, gas shunt valve; 300, integrated box; 400, circulating heat conduction mechanism; 410, second gas-liquid heat exchanger; 420, third gas-liquid heat exchanger; 430, gas guide pipeline; 440, liquid delivery pump. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further described in detail below in combination with the drawings and specific embodiments.

[0023] As Figure 1 - Figure 4 The utility model provides a structure schematic drawing of condensing pipeline mechanism in NMP heat exchange module, including first gas-liquid heat exchanger 100 and circulating heat conduction mechanism 400, the inside installation of first gas-liquid heat exchanger 100 has condensing pipeline mechanism 200, and both ends of condensing pipeline mechanism 200 are penetrated to the outside of first gas-liquid heat exchanger 100, and the surface of first gas-liquid heat exchanger 100 is fixedly connected with integrated box 300;The surface of heat conduction pipe 210 is installed with air heater arranged between second gas-liquid heat exchanger 410 and gas shunt valve 240, and the air heater is fixedly connected in the inside of integrated box 300, and the opposite ends of two gas shunt valves 240 are fixedly connected and communicated with air inlet fan and air outlet fan.

[0024] As Figure 3 The utility model provides a structure schematic drawing of condensing pipeline mechanism in NMP heat exchange module, including first gas-liquid heat exchanger 100 and circulating heat conduction mechanism 400, the inside installation of first gas-liquid heat exchanger 100 has condensing pipeline mechanism 200, and both ends of condensing pipeline mechanism 200 are penetrated to the outside of first gas-liquid heat exchanger 100, and the surface of first gas-liquid heat exchanger 100 is fixedly connected with integrated box 300;The surface of heat conduction pipe 210 is installed with air heater arranged between second gas-liquid heat exchanger 410 and gas shunt valve 240, and the air heater is fixedly connected in the inside of integrated box 300, and the opposite ends of two gas shunt valves 240 are fixedly connected and communicated with air inlet fan and air outlet fan.

[0025] As Figure 3 And Figure 4As shown, the condensing pipeline mechanism 200 comprises a heat pipe 210 fixedly connected to one end of the second gas-liquid heat exchanger 410, one end of the heat pipe 210 sequentially penetrates the second gas-liquid heat exchanger 410, the first gas-liquid heat exchanger 100 and the third gas-liquid heat exchanger 420 and extends to the outside of the third gas-liquid heat exchanger 420, the heat pipe 210 is fixedly connected and communicated with a liquid discharge pipe 220 arranged at the lowest part inside the first gas-liquid heat exchanger 100, one end of the liquid discharge pipe 220 sequentially penetrates the first gas-liquid heat exchanger 100 and the integrated tank 300 and extends to the outside of the integrated tank 300;

[0026] When the gasified NMP is condensed and liquefied, the liquid NMP flows into the liquid discharge pipe 220 along the heat pipe 210, when the staff needs to collect the liquid NMP, the staff only needs to lock the control to open the electric valve 230, at this time the liquid discharge pipe 220 is communicated with the outside, and the liquid NMP flows out of the liquid discharge pipe 220 under the action of gravity.

[0027] The local cross-sectional shape of the heat pipe 210 arranged inside the second gas-liquid heat exchanger 410, the first gas-liquid heat exchanger 100 and the third gas-liquid heat exchanger 420 is serpentine, which can prolong the passing time of the gas inside the second gas-liquid heat exchanger 410, the first gas-liquid heat exchanger 100 and the third gas-liquid heat exchanger 420, and respectively improve the cooling, condensation and preheating effects of the gas.

[0028] The liquid discharge pipe 220 gradually inclines downward from the inside of the integrated tank 300 to the outside of the integrated tank 300, and the lowest part of the liquid discharge pipe 220 is arranged outside the integrated tank 300, which can ensure that the liquid NMP can flow out by itself when the liquid discharge pipe 220 is opened, thereby reducing the difficulty of the staff collecting the liquid NMP.

[0029] The communication part of the liquid discharge pipe 220 and the heat pipe 210 is not less than five, and the liquid discharge pipe 220 is below the heat pipe 210, which can accelerate the flow rate of the liquid NMP into the liquid discharge pipe 220, thereby reducing the evaporation rate of the liquid NMP under the action of the gas flow.

[0030] The surface of the liquid discharge pipe 220 is embedded and communicated with the electric valve 230, and the electric valve 230 is arranged outside the integrated tank 300, which can effectively open and close the liquid discharge pipe 220, and avoid leakage of the gas or liquid NMP from the opening of the liquid discharge pipe 220 to the outside.

[0031] The number of heat pipes 210 is not less than five, and the spacing between adjacent two heat pipes 210 is the same, which can increase the indirect contact area of the gas with the second gas-liquid heat exchanger 410, the first gas-liquid heat exchanger 100 and the third gas-liquid heat exchanger 420, thereby improving the heat exchange and separation effect of the NMP.

[0032] The condenser pipeline mechanism 200 further comprises two gas distribution valves 240 fixedly connected with the integrated box 300, and the heat conducting pipe 210 is fixedly connected and communicated between the two gas distribution valves 240, which not only can uniformly disperse the gas discharged by the air inlet fan into the corresponding heat conducting pipe 210, but also can gather the preheated gas when the preheated gas enters the air outlet fan through the heat conducting pipe 210, so that the exhaust gas is more uniform.

[0033] Working principle: Before using the NMP heat exchange module, the staff first connects the air inlet fan and the air outlet fan with the air outlet and the air inlet of the oven respectively, and then controls the air inlet fan, the air outlet fan and the first gas-liquid heat exchanger 100 to be opened at the same time. At this time, the air inlet fan transports the high-temperature waste gas containing vaporized NMP in the oven into the first gas-liquid heat exchanger 100 to be cooled to below 14℃, at which time the vaporized NMP is close to the melting point, which can quickly liquefy the vaporized NMP to separate the waste gas from the NMP, so as to solve the problem of environmental pollution and waste of vaporized NMP.

[0034] Before the high-temperature waste gas enters the first gas-liquid heat exchanger 100, the second gas-liquid heat exchanger 410 quickly cools the high-temperature waste gas to 50℃ to reduce the cooling burden of the subsequent first gas-liquid heat exchanger 100. Then the warmed cooling water of the second gas-liquid heat exchanger 410 is transported into the third gas-liquid heat exchanger 420 through the air guide pipeline 430 connected thereto, the third gas-liquid heat exchanger 420 replaces the heat of the warmed cooling water into the gas discharged from the first gas-liquid heat exchanger 100 to achieve the purpose of preheating the gas, and then the preheated gas is heated to 80℃ by the air heater and then transported back into the oven by the air outlet fan. This not only achieves the effect of energy-saving cycle drying NMP, but also forms a sealed structure with the NMP heat exchange module to prevent the waste gas containing NMP from leaking to the outside, further reducing the pollution to the outside environment and the waste of NMP.

[0035] It should be noted that the first gas-liquid heat exchanger 100, the electric valve 230, the gas distribution valve 240, the second gas-liquid heat exchanger 410, the third gas-liquid heat exchanger 420, the liquid pump 440, the air heater, the air inlet fan and the air outlet fan in the above description are all mature devices in the prior art, and the specific model can be selected according to actual needs. At the same time, the power supply of the first gas-liquid heat exchanger 100, the electric valve 230, the second gas-liquid heat exchanger 410, the third gas-liquid heat exchanger 420, the liquid pump 440, the air heater, the air inlet fan and the air outlet fan can be built-in power supply or mains power supply, and the specific power supply mode is selected as needed, which is not described here.

[0036] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. An NMP heat exchange module, comprising a first gas-liquid heat exchanger (100), a condensing pipeline mechanism (200) is internally installed in the first gas-liquid heat exchanger (100), both ends of the condensing pipeline mechanism (200) are penetrated to the outside of the first gas-liquid heat exchanger (100), characterized in that, The surface of the first gas-liquid heat exchanger (100) is fixedly connected with an integrated box (300); A circulating heat conduction mechanism (400) is arranged, the circulating heat conduction mechanism (400) comprises a second gas-liquid heat exchanger (410) and a third gas-liquid heat exchanger (420), the second gas-liquid heat exchanger (410) and the third gas-liquid heat exchanger (420) are symmetrically distributed on both sides of the first gas-liquid heat exchanger (100), both ends of the condensing pipeline mechanism (200) respectively penetrate the outside of the second gas-liquid heat exchanger (410) and the third gas-liquid heat exchanger (420), the second gas-liquid heat exchanger (410) and the third gas-liquid heat exchanger (420) are fixedly connected and communicated with two gas guide pipelines (430), and the surface of one of the gas guide pipelines (430) is embeddedly installed and communicated with a liquid delivery pump (440).

2. The NMP heat exchange module of claim 1, wherein, The condensing pipeline mechanism (200) comprises a heat conduction pipe (210), one end of the heat conduction pipe (210) is fixedly connected to the second gas-liquid heat exchanger (410), one end of the heat conduction pipe (210) penetrates the second gas-liquid heat exchanger (410), the first gas-liquid heat exchanger (100) and the third gas-liquid heat exchanger (420) in sequence and extends to the outside of the third gas-liquid heat exchanger (420), the heat conduction pipe (210) is fixedly connected and communicated with a liquid discharge pipe (220) arranged at the lowest position in the first gas-liquid heat exchanger (100), and one end of the liquid discharge pipe (220) penetrates the first gas-liquid heat exchanger (100) and the integrated box (300) in sequence and extends to the outside of the integrated box (300).

3. The NMP heat exchange module of claim 2, wherein, The heat conduction pipe (210) is arranged in the second gas-liquid heat exchanger (410), the first gas-liquid heat exchanger (100) and the third gas-liquid heat exchanger (420), and the local cross-sectional shape of the heat conduction pipe (210) is serpentine.

4. The NMP heat exchange module of claim 2, wherein, The liquid discharge pipe (220) gradually inclines downward from the inside of the integrated box (300) to the outside of the integrated box (300), and the lowest position of the liquid discharge pipe (220) is arranged outside the integrated box (300).

5. The NMP heat exchange module of claim 4, wherein, The communication position of the liquid discharge pipe (220) and the heat conduction pipe (210) is not less than five, and the liquid discharge pipe (220) is below the heat conduction pipe (210).

6. The NMP heat exchange module of claim 2, wherein, The surface of the liquid discharge pipe (220) is embeddedly installed and communicated with an electric valve (230), and the electric valve (230) is arranged outside the integrated box (300).

7. The NMP heat exchange module of claim 2, wherein, The number of the heat conduction pipes (210) is not less than five, and the distance between adjacent two heat conduction pipes (210) is the same.

8. The NMP heat exchange module of claim 7, wherein, The condensing pipeline mechanism (200) further comprises two gas shunt valves (240) fixedly connected with the integrated box (300), and the heat conduction pipes (210) are fixedly connected and communicated between the two gas shunt valves (240).

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