Triethylamine recovery device

Abstract

The utility model relates to a triethylamine recovery device which comprises a dissolving component, a neutralizing component, a distilling component, an impurity removing component and a recovery tank, the dissolving component is used for dissolving triethylamine phosphate and forming a triethylamine phosphate solution, the liquid inlet end of the neutralizing component is communicated with the liquid outlet end of the dissolving component, and the liquid outlet end of the distilling component is communicated with the liquid outlet end of the impurity removing component. The neutralization assembly is used for receiving and adjusting the pH value of a triethylamine phosphate solution to generate a triethylamine solution, the liquid inlet end of the distillation assembly is communicated with the liquid outlet end of the neutralization assembly and used for receiving and evaporating water in the triethylamine solution, and the liquid inlet end of the impurity removal assembly is communicated with the liquid outlet end of the distillation assembly and used for removing impurities in the triethylamine solution. The impurity removal assembly is used for receiving and removing water and impurities in the triethylamine solution to form triethylamine, and the liquid inlet end of the recovery tank and the liquid outlet end of the impurity removal assembly are used for receiving and storing triethylamine; the problem that resources are wasted due to the fact that triethylamine phosphate is not recycled is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of triethylamine recovery and utilization, in particular to a triethylamine recovery device. Background Art

[0002] Triethylamine waste gas is an organic waste gas and is usually treated by phosphoric acid spray absorption method, which can effectively remove triethylamine in the waste gas and generate triethylamine phosphate.

[0003] For example, the utility model patent with application number CN201820996077.2 proposes a triethylamine waste gas purification tower, in which the triethylamine waste gas purification tower realizes the automatic acid addition function of the triethylamine waste gas purification tower by installing an acid liquid tank and an acid pump inside the tower base, installing an acid inlet pipe and a spray chamber inside the outer body of the purification chamber, and arranging a water spray pipe, an air outlet pipe, and a pH detector inside the spray chamber, thereby improving the purification degree of the triethylamine waste gas.

[0004] However, the generated triethylamine phosphate cannot be reused, resulting in a waste of resources. Utility Model Content

[0005] In view of this, it is necessary to provide a triethylamine recovery device to solve the problem that triethylamine phosphate cannot be reused, resulting in a waste of resources.

[0006] The utility model provides a triethylamine recovery device, which comprises a dissolving component, a neutralizing component, a distillation component, an impurity removal component and a recovery tank. The dissolving component is used to dissolve triethylamine phosphate and form a triethylamine phosphate solution. The liquid inlet end of the neutralizing component is connected with the liquid outlet end of the dissolving component and is used to receive and adjust the pH value of the triethylamine phosphate solution to generate a triethylamine solution. The liquid inlet end of the distillation component is connected with the liquid outlet end of the neutralizing component and is used to receive and evaporate water in the triethylamine solution. The liquid inlet end of the impurity removal component is connected with the liquid outlet end of the distillation component and is used to receive and remove water and impurities in the triethylamine solution to generate triethylamine. The liquid inlet end of the recovery tank and the liquid outlet end of the impurity removal component are used to receive and store triethylamine.

[0007] Furthermore, the dissolution component includes a dissolution kettle having a first feed port, a first steam inlet, a first water inlet, a first condensed water outlet and a first discharge port.

[0008] Furthermore, the dissolution component includes a dissolution kettle and a plate-and-frame filter press that are connected in sequence, and the plate-and-frame filter press is connected to the neutralization component.

[0009] Furthermore, the neutralization component includes a neutralization and stratification kettle connected to the dissolution component and the distillation component, and the neutralization and stratification kettle has a second feed port, an alkali addition port, a second water inlet, a first air inlet and a second discharge port.

[0010] Furthermore, the neutralization component also includes an alkali solution dripping tank installed on the top of the neutralization and stratification kettle.

[0011] Furthermore, the distillation component includes a distillation kettle connected to the neutralization component and the impurity removal component, and the distillation kettle includes a third feed port, a second steam inlet, a second air inlet, a second condensed water outlet and a third discharge port.

[0012] Furthermore, the impurity removal component includes a hydrocondenser, a receiving tank and a filter. The feed port of the hydrocondenser is connected to the distillation component to receive and cool the triethylamine solution. The hydrocondenser, the receiving tank, the filter and the recovery tank are connected in sequence.

[0013] Furthermore, the impurity removal component also includes a dehydration column, the receiving tank has a fourth discharge port and a fifth discharge port, the fourth discharge port of the receiving tank is connected to the feed port of the dehydration column, the discharge port of the dehydration column is connected to the receiving tank, and the fifth discharge port of the receiving tank is connected to the recovery tank.

[0014] Furthermore, it also includes a first valve installed at the fourth discharge port of the receiving tank and a second valve installed at the fifth discharge port, and the first valve and the second valve are opened alternately.

[0015] Furthermore, the device also includes a water supply component connected to the dissolution component and the neutralization component, the device also includes an ammonia supply component connected to the neutralization component, the distillation component, the impurity removal component and the recovery tank, and also includes a waste gas treatment component connected to the distillation component and the recovery tank.

[0016] Compared with the prior art, the method comprises the following steps: sending triethylamine phosphate and water to a dissolving component for dissolution to generate a triethylamine phosphate solution; the triethylamine phosphate solution enters a neutralizing component, and alkali is added to perform an acid-base neutralization reaction; the generated triethylamine solution is introduced into a distillation component to remove moisture; and finally, the method is passed through an impurity removal component for impurity removal and further water removal to obtain pure triethylamine, which is stored in a recovery tank, thereby completing the recovery and reuse of triethylamine in the triethylamine phosphate and improving resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of a triethylamine recovery device provided in an embodiment of the utility model;

[0018] Figure 2A schematic structural diagram of a neutralization component of a triethylamine recovery device provided in an embodiment of the present invention;

[0019] Figure 3 The present invention provides a schematic structural diagram of an impurity removal component in a triethylamine recovery device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0021] like Figure 1 As shown, the present invention provides a triethylamine recovery device, which includes a dissolving component 100, a neutralizing component 200, a distillation component 300, an impurity removal component 400 and a recovery tank 500. The dissolving component 100 is used to dissolve triethylamine phosphate and form a triethylamine phosphate solution. The liquid inlet end of the neutralizing component 200 is connected to the liquid outlet end of the dissolving component 100, and is used to receive and adjust the pH value of the triethylamine phosphate solution to generate a triethylamine solution. The liquid inlet end of the distillation component 300 is connected to the liquid outlet end of the neutralizing component 200, and is used to receive and evaporate water in the triethylamine solution. The liquid inlet end of the impurity removal component 400 is connected to the liquid outlet end of the distillation component 300, and is used to receive and remove water and impurities in the triethylamine solution to generate triethylamine. The liquid inlet end of the recovery tank 500 and the liquid outlet end of the impurity removal component 400 are used to receive and store triethylamine.

[0022] During implementation, triethylamine phosphate and water are sent to the dissolution component 100 for dissolution to generate a triethylamine phosphate solution. The triethylamine phosphate solution enters the neutralization component 200, and a base is added to perform an acid-base neutralization reaction. The generated triethylamine solution is introduced into the distillation component 300 to remove moisture. Finally, the solution is removed from the impurities and further dehydrated by the impurity removal component 400 to obtain pure triethylamine, which is stored in the recovery tank 500, thereby completing the recovery and reuse of the triethylamine in the triethylamine phosphate and improving resource utilization.

[0023] The dissolving component 100 in this embodiment is used to dissolve triethylamine phosphate and form a triethylamine phosphate solution.

[0024] In one embodiment, the dissolution assembly 100 includes a dissolution vessel 110 having a first feed inlet, a first steam inlet, a first water inlet, a first condensed water outlet, and a first discharge port. The first feed inlet facilitates the introduction of triethylamine phosphate into the dissolution vessel 110, and water is added through the first water inlet for mixing with the triethylamine phosphate. Steam enters the interlayer of the dissolution vessel 110 through the first steam inlet to heat the dissolution vessel 110, thereby accelerating the mixing of water and triethylamine phosphate. The resulting triethylamine phosphate solution is discharged through the first discharge port.

[0025] In order to prevent the undissolved triethylamine phosphate in the derived triethylamine phosphate solution from entering the subsequent process and affecting the subsequent reaction process, in this embodiment, the dissolution component 100 includes a dissolution kettle 110 and a plate and frame filter press 120 connected in sequence, and the plate and frame filter press 120 is connected to the neutralization component 200.

[0026] To extract triethylamine from the triethylamine phosphate solution, the liquid inlet of the neutralization component 200 in this embodiment is connected to the liquid outlet of the dissolution component 100 to receive and adjust the pH of the triethylamine phosphate solution to generate a triethylamine solution.

[0027] like Figure 2 As shown, in one embodiment, the neutralization component 200 includes a neutralization and layering kettle 210 connected to the dissolution component 100 and the distillation component 300. The neutralization and layering kettle 210 has a second feed inlet, an alkali addition port, a second water inlet, a first air inlet, and a second discharge port. The second feed inlet facilitates the introduction of a triethylamine phosphate solution into the neutralization and layering kettle 210. An appropriate amount of alkali is introduced through the alkali addition port to react with the triethylamine phosphate solution to produce the desired triethylamine solution.

[0028] In order to improve the accuracy of the pH value of the solution in the neutralization and stratification kettle 210, in this embodiment, the neutralization component 200 also includes an alkali solution dripping tank 220 installed on the top of the neutralization and stratification kettle 210, and alkali solution is dripped into the neutralization and stratification kettle 210 through the alkali solution dripping tank 220 to accurately adjust the pH value of the solution in the neutralization and stratification kettle 210.

[0029] The generated triethylamine solution contains a large amount of water. Therefore, in this embodiment, the liquid inlet end of the distillation component 300 is connected to the liquid outlet end of the neutralization component 200 to receive and evaporate the water in the triethylamine solution.

[0030] In one embodiment, the distillation assembly 300 includes a still connected to the neutralization assembly 200 and the impurity removal assembly 400. The still includes a third feed port, a second steam inlet, a second air inlet, a second condensed water outlet, and a third outlet. The third feed port facilitates the introduction of the triethylamine solution into the still. Steam enters the interlayer of the still through the second steam inlet to heat the still, accelerating the evaporation of water from the triethylamine solution. The resulting triethylamine solution with a reduced water content is then discharged through the third outlet.

[0031] The impurity removal assembly 400 in this embodiment is a structure for further removing water and impurities from the triethylamine solution having a relatively low water content.

[0032] like Figure 3 As shown, in one embodiment, the impurity removal component 400 includes a hydrocondenser 410, a receiving tank 420 and a filter 430. The feed port of the hydrocondenser 410 is connected to the distillation component 300 to receive and cool the triethylamine solution. The hydrocondenser 410, the receiving tank 420, the filter 430 and the recovery tank 500 are connected in sequence.

[0033] Furthermore, the impurity removal component 400 also includes a dehydration column 440. The receiving tank 420 has a fourth discharge port and a fifth discharge port. The fourth discharge port of the receiving tank 420 is connected to the feed port of the dehydration column 440, the discharge port of the dehydration column 440 is connected to the receiving tank 420, and the fifth discharge port of the receiving tank 420 is connected to the recovery tank 500. Furthermore, a first valve 441 installed at the fourth discharge port of the receiving tank 420 and a second valve 540 installed at the fifth discharge port are provided. The first valve 441 and the second valve 540 are opened alternately.

[0034] When the first valve 441 is opened and the second valve 540 is closed, the receiving tank 420, the filter 430 and the dehydration column 440 are connected in sequence, and the process of cyclic water removal and impurity removal can be realized. When the second valve 540 is opened and the first valve 441 is closed, the receiving tank 420, the filter 430 and the recovery tank 500 are connected in sequence, and the triethylamine in the cyclic water removal and impurity removal process can be introduced into the recovery tank 500 for storage.

[0035] It is understandable that the number of receiving tanks 420, filters 430 and dehydration columns 440 can be set to multiple, and a recovery pump can be used to drive the flow of solution between multiple components.

[0036] In this embodiment, the device also includes a water supply component 600 connected to the dissolution component 100 and the neutralization component 200, the device also includes an ammonia supply component 700 connected to the neutralization component 200, the distillation component 300, the impurity removal component 400 and the recovery tank 500, and also includes a waste gas treatment component 800 connected to the distillation component 300 and the recovery tank 500.

[0037] The water supply component 600 is used to increase the water content required in the recovery device, the ammonia supply component 700 is used to provide ammonia, and the waste gas treatment component 800 is used to treat the waste gas produced during the reaction process.

[0038] Example:

[0039] 1) triethylamine hydrochloride and water are introduced into a dissolution kettle 110 and dissolved by steam heating. The filter cloth in the plate and frame filter press 120 intercepts the undissolved triethylamine hydrochloride;

[0040] 2) Alkali is introduced into the alkali solution adding tank 220 for neutralization reaction at a ratio of 7:1 (alkali is 1 part). After the oil and water are separated, water is discharged from the bottom of the neutralization and delamination kettle 210, and the separated reaction liquid is extracted from the top port;

[0041] 3) The separated reaction liquid is extracted from the top port and enters the distillation kettle for high-temperature distillation to evaporate and remove water. The water vapor enters the tail gas treatment system, passes through the secondary hydrochloric acid condenser, and is sprayed with water to prevent environmental pollution;

[0042] 4) The distilled reaction liquid enters the condenser for cooling and is output to two receiving tanks 420;

[0043] 5) The reaction liquid in the receiving tank 420 is further filtered to remove impurities;

[0044] 6) Entering the dehydration column 440 for secondary water removal, the water content is to be less than 1000ppm, and entering the triethylamine recovery tank 500 for storage, and a pipeline can be set to the synthesis reactor for triethylamine reuse;

[0045] 7) The gas in the triethylamine recovery tank 500 enters the water vapor and enters the tail gas treatment system for tail gas treatment.

[0046] Compared with the prior art, triethylamine phosphate and water are sent to a dissolving component 100 for dissolution to generate a triethylamine phosphate solution, the triethylamine phosphate solution enters a neutralizing component 200, and a base is added to perform an acid-base neutralization reaction, the generated triethylamine solution is introduced into a distillation component 300 to remove water, and finally, impurities are removed and water is further discharged by an impurity removal component 400 to obtain pure triethylamine, which is stored in a recovery tank 500, thereby completing the recovery and reuse of triethylamine in the triethylamine phosphate and improving resource utilization.

[0047] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A triethylamine recovery device, characterized in that, Including dissolution components, neutralization components, distillation components, impurity removal components and recovery tanks; The dissolving component is used to dissolve triethylamine phosphate and form a triethylamine phosphate solution; The liquid inlet end of the neutralization component is connected to the liquid outlet end of the dissolution component, and is used to receive and adjust the pH of the triethylamine phosphate solution to generate a triethylamine solution; The liquid inlet end of the distillation component is connected to the liquid outlet end of the neutralization component to receive and evaporate water in the triethylamine solution; The liquid inlet end of the impurity removal component is connected to the liquid outlet end of the distillation component, and is used to receive and remove water and impurities in the triethylamine solution to form triethylamine; The liquid inlet end of the recovery tank and the liquid outlet end of the impurity removal component are used to receive and store triethylamine.

2. triethylamine recovery device according to claim 1, is characterized in that, The dissolving component includes a dissolving kettle having a first feed port, a first steam inlet, a first water inlet, a first condensed water outlet, and a first discharge port.

3. triethylamine recovery device according to claim 2, is characterized in that, The dissolving component includes a dissolving kettle and a plate-frame filter press which are connected in sequence, and the plate-frame filter press is connected to the neutralization component.

4. triethylamine recovery device according to claim 1, is characterized in that, The neutralization component includes a neutralization and layering kettle connected to the dissolution component and the distillation component. The neutralization and layering kettle has a second feed port, an alkali addition port, a second water inlet, a first air inlet and a second discharge port.

5. triethylamine recovery device according to claim 4, is characterized in that, The neutralization component also includes an alkali solution dripping tank installed on the top of the neutralization and stratification kettle.

6. triethylamine recovery device according to claim 1, is characterized in that, The distillation component includes a distillation kettle connected to the neutralization component and the impurity removal component, and the distillation kettle includes a third feed port, a second steam inlet, a second air inlet, a second condensed water outlet and a third discharge port.

7. triethylamine recovery device according to claim 1, is characterized in that, The impurity removal component includes a hydrocondenser, a receiving tank and a filter. The feed port of the hydrocondenser is connected to the distillation component to receive and cool the triethylamine solution. The hydrocondenser, the receiving tank, the filter and the recovery tank are connected in sequence.

8. triethylamine recovery device according to claim 7, is characterized in that, The impurity removal component also includes a dehydration column, and the receiving tank has a fourth discharge port and a fifth discharge port. The fourth discharge port of the receiving tank is connected to the feed port of the dehydration column, the discharge port of the dehydration column is connected to the receiving tank, and the fifth discharge port of the receiving tank is connected to the recovery tank.

9. triethylamine recovery device according to claim 8, is characterized in that, It also includes a first valve installed at the fourth discharge port of the receiving tank and a second valve installed at the fifth discharge port, and the first valve and the second valve are opened alternately.

10. The triethylamine recovery device according to claim 1, wherein The device also includes a water supply component connected to the dissolution component and the neutralization component, an ammonia supply component connected to the neutralization component, the distillation component, the impurity removal component and the recovery tank, and an exhaust gas treatment component connected to the distillation component and the recovery tank.

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