Low-energy-consumption NMP gas recovery tower

Abstract

The utility model discloses a low-energy-consumption NMP (N-Methyl Pyrrolidone) gas recovery tower which structurally comprises a base and a circulating water tank arranged at the bottom of the base, a connector of the circulating water tank is connected with a water inlet of a circulating pump, a recovery tower is arranged on a groove body at the top of the base, the recovery tower penetrates through the base and is connected with the water inlet at the bottom, and a spray head is arranged in the recovery tower. The spray header is fixed at the top of the cooling plate, the cooling plate is mounted at the top of a flow outlet of the gas pipe interface, the gas pipe interface is positioned at the bottom of the cooling plate, and gas flows out from a gas outlet end of the gas pipe interface after being treated by the cooling plate; the improved gas recovery tower has the beneficial effects that liquid is thinned by the cross-shaped spray header and then splashed to the surface of the cooling plate, the wavy cooling plate slows down the speed of the liquid dropping to the bottom recovery tank, the liquid is guided in the groove, the contact area of the liquid and gas is larger, part of the liquid flows out from the drainage bottom hole, and the gas recovery effect is improved. And the cooling plate entering the bottom is matched with the cross-shaped spraying head again, so that the recovery efficiency is greatly improved.

Description

Technical Field

[0001] The utility model discloses a low-energy-consuming NMP gas recovery tower, belonging to the field of gas recovery devices. Background Art

[0002] N-methylpyrrolidone (NMP for short) is an important chemical raw material and is widely used in lithium battery production. When passing through the coating machine, the used NMP will be discharged into the atmosphere in the form of organic waste gas, which not only causes great pollution to the local environment, but also causes huge economic losses and energy waste. The existing NMP gas recovery tower mostly uses a spray device to cool the waste gas to dissolve the NMP in the waste gas in water. The contact time between the spray head and the waste gas is short when the spray head sprays water for cooling, which leads to a decrease in the efficiency of NMP dissolving in water and affects its recovery effect. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model aims to provide a low-energy NMP gas recovery tower to solve the problem that the existing NMP gas recovery tower mostly uses a spray device to cool the exhaust gas to dissolve the NMP in the exhaust gas in water, and the contact time between the spray head and the exhaust gas when spraying water for cooling is short, which leads to a reduced efficiency of NMP dissolving in water and affects its recovery effect.

[0004] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a low-energy NMP gas recovery tower, whose structure includes: a base, a circulating water tank installed at the bottom of the base, the interface of the circulating water tank is connected to the water inlet of the circulating pump, the top trough of the base is provided with a recovery tower, the recovery tower penetrates the base and is connected to the water inlet at the bottom, a spray head is provided inside the recovery tower, the spray head is fixed on the top of the cooling plate, the cooling plate is installed on the top of the air pipe interface outlet, the air pipe interface is at the bottom of the cooling plate, and the gas is processed by the cooling plate and flows out from the air outlet end of the air pipe interface.

[0005] Preferably, the recovery tower further comprises: a circulation port, which is installed at the bottom of the tower body and connected to a circulation water tank.

[0006] Preferably, the spray head is of a cross structure and is combined with a cooling plate, with two groups installed inside the tower body to increase the spraying area and accelerate cooling.

[0007] Preferably, the cooling plate comprises: a plate body, a groove is provided on the surface of the plate body, the plate body is fixed inside the supporting outer ring, and a through-flow bottom hole is provided in the groove, and an air pipe interface is opened on the side wall of the tower body, and there are two air pipe interfaces, the top is an air inlet, and the bottom is an air outlet.

[0008] Preferably, protrusions are provided between the grooves of the plate body, so that the plate body forms a wave-like structure, so that the top spray head can collide with the plate body when spraying, and produce finer water droplets for reaction.

[0009] Preferably, the bottom surface of the groove is lower than the supporting outer ring, so that the groove and the adjacent ends of the supporting outer ring are in a through state, thereby increasing the cooling water flow area while avoiding internal blockage.

[0010] Preferably, the drainage bottom hole is provided at the edge of the groove adjacent to the plate body, so that the water flow in the groove can be spread out, the contact area with NMP is increased, and the reaction effect is improved.

[0011] Preferably, the plate is made of stainless steel and is corrosion-resistant. Beneficial Effects

[0012] The utility model discloses a low-energy-consuming NMP gas recovery tower, which has the following effects: after the improved gas recovery tower, the cross spray head refines the liquid and then splashes it onto the surface of the cooling plate, the wavy cooling plate slows down the speed of the liquid dripping to the bottom recovery groove, guides the liquid in the groove, makes the contact surface between the liquid and the gas larger, and part of the liquid flows out from the drainage bottom hole (flows out, enters the bottom cooling plate and cooperates with the cross spray head again, thereby greatly improving the recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 The utility model is a schematic diagram of the structure of a low-energy consumption NMP gas recovery tower.

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the practical recovery tower.

[0016] Figure 3 Schematic diagram of the top view of the cooling plate of this utility model.

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the axial side of the practical cooling plate.

[0018] In the figure: recovery tower-1, cooling water pipe-2, base-3, circulation pump-4, circulation water tank-5, sprinkler head-11, tower body-12, circulation port-13, air pipe interface-14, cooling plate-15, plate body-151, groove-152, support outer ring-153, discharge bottom hole-154. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] See also Figure 1 to Figure 2 The utility model provides a low-energy NMP gas recovery tower technical solution: its structure includes: a base 3, a circulating water tank 5 installed at the bottom of the base 3, the interface of the circulating water tank 5 is connected to the water inlet of the circulating pump 4, and is characterized in that: the top tank body of the base 3 is provided with a recovery tower 1, the recovery tower 1 penetrates the base 3 and is connected to the water inlet at the bottom, and the cooling water after the reaction is recovered, a spray head 11 is provided inside the recovery tower 1, the spray head 11 is fixed on the top of the cooling plate 15, the cooling water sprayed out can reduce the temperature of the exhaust gas, and is combined with the NMP in the exhaust gas to dissolve it in water for recovery and treatment, the cooling plate 15 is installed on the top of the outlet of the air pipe interface 14, the air pipe interface 14 is at the bottom of the cooling plate 15, the gas is processed by the cooling plate 15 and flows out from the outlet end of the air pipe interface 14, and the circulation port 13 of the recovery tower 1 is installed at the bottom of the tower body 12 and connected to the circulating water tank 5.

[0021] The spray head 11 is a cross structure and is combined with a cooling plate 15. Two groups are installed inside the tower body 12 to increase the spraying area and accelerate cooling. An air pipe interface 14 is opened on the side wall of the tower body 12. There are two air pipe interfaces 14, the top is an air inlet, and the bottom is an air outlet to guide the airflow, so as to filter the exhaust gas in real time and improve the filtering efficiency.

[0022] See also Figure 3 to Figure 4 The cooling plate 15 includes: a plate body 151, a groove 152 is provided on the surface of the plate body 151, the plate body 151 is fixed inside the support outer ring 153, and a through-flow bottom hole 154 is provided in the groove 152, and a protrusion is provided between the grooves 152 of the plate body 151, so that the plate body 151 forms a wavy structure, so that the top spray head 11 can collide with the plate body 151 when spraying, and produce finer water droplets for reaction, the bottom surface of the groove 152 is lower than the support outer ring 153, so that the adjacent ends of the groove 152 and the support outer ring 153 are in a through state, so that the cooling water flow area is increased while avoiding internal blockage, and the leakage bottom hole 154 is opened at the edge line end adjacent to the groove 152 and the plate body 151, which can spread the water flow in the groove 152, increase the contact area with NMP, and improve the reaction effect, and the plate body 151 is made of stainless steel and can resist corrosion.

[0023] Instructions for use of this utility model: The side of the tower body 12 of the recovery tower 1 is equipped with an air pipe interface 14, which is connected to the external exhaust gas and introduces the exhaust gas into the tower body 12. The circulation pump 4 draws the water of the circulating water tank 5 into the spray head 11, and the spray head 11 splashes onto the surface of the cooling plate 15.

[0024] N-methylpyrrolidone in the exhaust gas is combined with the cooling water when passing through the water curtain formed by the liquid. In order to improve the combination efficiency, the cooling plate 15 is wavy. Figure 4 When the liquid collides, it will form irregular splashes and then gather in the groove 152 of the plate body 151. The liquid surface contact area in the groove 152 becomes larger. When the liquid accumulates to the leakage bottom hole 154, it will drip down from the leakage bottom hole 154 for further dispersed cooling, and part of the liquid will flow out from the port of the groove 152, which is located at the bottom of the ring body supporting the outer ring 153.

[0025] The reaction effect is improved by the two-stage refinement of the cooling water flow, and the temperature of the cooling water can be reduced at the same time. The water flow after the reaction passes through the circulation port 13 connected to the circulation water tank 5, and the cooling water combined with NMP is output for extraction, and the water flow is circulated again after extraction.

[0026] The improved gas recovery tower 1 has a cross spray head 11 that refines the liquid and then sprays it onto the surface of the cooling plate 15. The wavy cooling plate 15 slows down the speed at which the liquid drips into the bottom recovery tank and guides the liquid in the groove 152 to increase the contact area between the liquid and the gas. Part of the liquid will flow out from the bottom leakage hole 154 and enter the bottom cooling plate 15 to cooperate with the cross spray head 11 again, thereby greatly improving the recovery efficiency.

[0027] The above only describes the basic principles and preferred implementations of the present utility model. Those skilled in the art can make many changes and improvements based on the above description, and these changes and improvements should fall within the protection scope of the present utility model.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A low-energy-consuming NMP gas recovery tower, the structure of which comprises: A base (3), a circulating water tank (5) installed at the bottom of the base (3), the interface of the circulating water tank (5) being connected to the water inlet of the circulating pump (4), characterized in that: a recovery tower (1) is provided at the top tank body of the base (3), the recovery tower (1) penetrates the base (3) and is connected to the water inlet of the bottom circulating water tank (5), a spray head (11) is provided inside the recovery tower (1), the spray head (11) is fixed on the top of the cooling plate (15), and the cooling plate (15) is installed on the top of the outlet of the air pipe interface (14); The cooling plate (15) comprises: a plate body (151), a groove (152) is provided on the surface of the plate body (151), the plate body (151) is fixed inside the supporting outer ring (153), and a through-flow bottom hole (154) is provided in the groove (152), a protrusion is provided between the grooves (152) of the plate body (151), so that the plate body (151) forms a wavy structure, and the bottom surface of the groove (152) is lower than the supporting outer ring (153), so that the adjacent ends of the groove (152) and the supporting outer ring (153) are in a through state.

2. A low-energy-consuming NMP gas recovery tower as claimed in claim 1, characterized in that: The air pipe interface (14) is located at the bottom of the cooling plate (15), and the gas is processed by the cooling plate (15) and flows out from the gas outlet end of the air pipe interface (14).

3. A low-energy-consuming NMP gas recovery tower as claimed in claim 1, characterized in that: The recovery tower (1) further comprises: a circulation port (13), wherein the circulation port (13) is installed at the bottom of the tower body (12) and connected to the circulation water tank (5).

4. A low-energy-consuming NMP gas recovery tower as claimed in claim 1, characterized in that: The spray head (11) is a cross structure and is combined with a cooling plate (15), with two groups being installed inside the tower body (12).

5. A low-energy-consuming NMP gas recovery tower as claimed in claim 3, characterized in that: The side wall of the tower body (12) is provided with an air pipe interface (14), and two air pipe interfaces (14) are provided, the top of which is an air inlet and the bottom of which is an air outlet.

6. A low-energy-consuming NMP gas recovery tower as claimed in claim 1, characterized in that: The drainage bottom hole (154) is provided at the edge line end of the groove (152) adjacent to the plate body (151).

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