Waste liquid deamination system
By designing a waste liquid deaming system, using the heat exchange technology of the deaming tower and steam condensation module, the dimethylamine concentration is reduced and it can be refluxed and used, solving the problem of dimethylamine pollution in DMF wastewater and improving water utilization and productivity.
Patent Information
- Application Number
- CN202421091888.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In the DMF wastewater generated during the manufacturing process of the ultra-fiber leather, the dimethylamine content is high, which makes the water on the top of the tower unable to flow back to the production line and reuse, causing environmental pollution and increasing the production cost of DMF wastewater recycling.
A waste liquid deaming system is designed, including a deaminogenic tower, a steam condensation module and a heat exchange module. The dimethylamine is removed through heat exchange between water and steam on the top of the tower, and the dimethylamine concentration is controlled within 40ppm, so that it can be used to Reflow and use it, and water resources are recycled through condensate reflux and heat exchange.
It effectively reduces the environmental pollution of dimethylamine, improves the utilization rate of water, ensures the recycling and reuse of DMF wastewater, and reduces production costs.
Smart Images
Figure CN222274245U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste liquid deammoniation, in particular to a waste liquid deammoniation system. Background Art
[0002] In the manufacturing process of microfiber leather, DMF (N,N-dimethylformamide) is used as a solvent to dissolve polyurethane resin. In this process, DMF is washed out by utilizing its water-soluble property, resulting in DMF wastewater in the manufacturing process of microfiber leather. In order to achieve the purpose of energy conservation and environmental protection, DMF wastewater needs to be recycled.
[0003] At present, in the production line for recovering DMF from DMF wastewater, dimethylamine produced by the decomposition of DMF will be distilled out from the top of the tower along with water, resulting in a high content of dimethylamine in the water at the top of the tower, so that the water at the top of the tower cannot be returned to the production line for reuse. However, direct discharge will cause environmental pollution due to the high content of dimethylamine, thereby not only increasing the production cost of recovering DMF from DMF wastewater, but also causing environmental pollution. Therefore, a waste liquid deammoniation system is proposed. Utility Model Content
[0004] The purpose of the utility model is to provide a waste liquid deammoniation system to solve the problems raised in the above background technology.
[0005] To achieve the above purpose, the utility model provides the following technical solution: a waste liquid deammoniation system, comprising:
[0006] A deamination tower, wherein a tower top water input pipeline and a steam input pipeline are respectively connected to the deamination tower, wherein the tower top water input pipeline is used to transport external tower top water to the inner cavity of the deamination tower, and the steam input pipeline is used to transport external steam to the inner cavity of the deamination tower;
[0007] A deamination tower top water cooling module, wherein a tower top water output pipeline is provided between the deamination tower top water cooling module and the deamination tower, and the tower top water output pipeline is used to transport the deamination tower top water discharged from the deamination tower to the deamination tower top water cooling module;
[0008] A steam condensation module, wherein a steam discharge pipeline and a condensate return pipeline are respectively provided between the steam condensation module and the deamination tower, wherein the steam discharge pipeline is used to transport the steam discharged from the deamination tower to the steam condensation module, and the condensate return pipeline is used to transport the condensed liquid in the steam condensation module to the deamination tower;
[0009] A dimethylamine concentrated water discharge module, which is used to discharge the dimethylamine concentrated water in the steam condensation module;
[0010] A heat exchange module is connected to the deamination tower top water cooling module and the steam condensation module respectively, and is used for heat exchange between the deamination tower top water cooling module and the steam condensation water module.
[0011] Preferably, the deamination tower top water cooling module comprises:
[0012] A water cooler, wherein a water outlet port of the water cooler is connected to a cooler water outlet pipeline, and the cooler water outlet pipeline is used to discharge the cooled deamination tower top water;
[0013] A tower bottom water outlet pump, wherein the water inlet port of the tower bottom water outlet pump is connected to the tower top water output pipeline, and a cooler water inlet pipeline is connected between the water outlet port of the tower bottom water outlet pump and the water inlet port of the water cooler.
[0014] Preferably, the steam condensation module comprises:
[0015] A deamination tower condenser, wherein a water inlet port of the deamination tower condenser is connected to a condenser air inlet pipeline connected to a steam exhaust pipeline;
[0016] A deamination condensate tank, wherein a condenser water outlet pipeline is connected between the water outlet port of the deamination tower condenser and the water inlet port of the deamination condensate tank.
[0017] Preferably, the heat exchange module includes a cold water outlet pipeline and a cold water return pipeline, the cold water outlet pipeline is respectively connected to the water inlet end of the deamination tower condenser and the water cooler, and the cold water return pipeline is respectively connected to the water outlet end of the deamination tower condenser and the water cooler.
[0018] Preferably, the dimethylamine concentrated water discharge module comprises a tower top water outlet pump, the water inlet port of the tower top water outlet pump is connected to the water outlet port of the deammoniation condensate tank, and the water outlet port of the tower top water outlet pump is connected to a sewage treatment pipeline.
[0019] Preferably, a liquid tank outlet pipeline is connected between the deammoniation condensate tank and the tower top outlet pump, and a reflux pump is connected between the liquid tank outlet pipeline and the condensate reflux pipeline.
[0020] Technical effects and advantages of the utility model:
[0021] The utility model can deammoniate the tower top water, thus solving the problem that the tower top water contains high dimethylamine (DMA), the DMF wastewater recovery DMF production line cannot be reused, and the discharge pollutes the environment. After passing through the deammoniation tower, the dimethylamine content of the tower bottom water can be controlled within 40ppm, and the water can be returned to the workshop for continued use, thus solving the problem of dimethylamine pollution to the environment and greatly improving the utilization rate of water. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1This is a schematic diagram of the process structure of the waste liquid deammoniation system of the utility model.
[0023] In the figure: 100, deamination tower; 101, tower top water input pipeline; 102, steam input pipeline; 103, steam discharge pipeline; 104, tower top water output pipeline; 105, condensate reflux pipeline; 200, water cooler; 201, cooler water inlet pipeline; 202, tower bottom water outlet pump; 203, cooler water outlet pipeline; 300, deamination tower condenser; 301, condenser water outlet pipeline; 302, condenser air inlet pipeline; 400, deamination condensate tank; 401, liquid tank water outlet pipeline; 402, reflux pump; 403, sewage treatment pipeline; 404, tower top water outlet pump; 500, cold water outlet pipeline; 501, cold water return pipeline. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] The utility model provides Figure 1The waste liquid deamination system shown in the figure comprises a deamination tower 100, a deamination tower top water cooling module, a steam condensation module, a dimethylamine concentrated water discharge module and a heat exchange module. The tower top water is transported from the concentration system in the DMF wastewater recovery DMF production line to the deamination tower 100, and then the steam of the steam cylinder is used to provide heat energy. The steam flow is adjusted by the regulating valve to heat the tower top water sprayed downward in the deamination tower 100 to remove the dimethylamine (DMA) therein. The gas carrying dimethylamine enters the steam condensation module to condense into condensate, and the wastewater enters the deamination tower The top water cooling module is discharged to the tank area after heat exchange cooling, and the heat exchange module performs heat exchange on the steam condensation module and the deamination tower top water cooling module to maintain the continuous use of both; the deamination tower 100 is respectively connected with a top water input pipeline 101 and a steam input pipeline 102, the top water input pipeline 101 is used to transport external top water to the inner cavity of the deamination tower 100, and the steam input pipeline 102 is used to transport external steam to the inner cavity of the deamination tower 100, and a top water output pipeline 104 is provided between the deamination tower top water cooling module and the deamination tower 100, The top water output pipeline 104 is used to transport the top water of the deamination tower discharged from the deamination tower 100 to the deamination tower top water cooling module. A steam discharge pipeline 103 and a condensate reflux pipeline 105 are respectively provided between the steam condensation module and the deamination tower 100. The steam discharge pipeline 103 is used to transport the steam discharged from the deamination tower 100 to the steam condensation module. The condensate reflux pipeline 105 is used to transport the condensed liquid in the steam condensation module to the deamination tower 100. The dimethylamine concentrated water discharge module is used to discharge the dimethylamine concentrated water in the steam condensation module. Water is discharged, and the heat exchange module is connected to the deamination tower top water cooling module and the steam condensation module respectively. The heat exchange module is used for heat exchange in the deamination tower top water cooling module and the steam condensation water module. It should be noted that this embodiment solves the problem that the top water contains high dimethylamine (DMA), the DMF waste water recovery DMF production line cannot be reused, and the discharge pollutes the environment. After the deamine tower, the dimethylamine content in the tower bottom water can be controlled within 40ppm and can be returned to the workshop for continued use, which solves the problem of dimethylamine pollution to the environment and greatly improves the water utilization rate.
[0026] In a preferred embodiment, the deamination tower top water cooling module includes a water cooler 200 and a tower bottom water outlet pump 202, the water outlet port of the water cooler 200 is connected to a cooler water outlet pipeline 203, the cooler water outlet pipeline 203 is used to discharge the cooled deamination tower top water, the water inlet port of the tower bottom water outlet pump 202 is connected to the tower top water output pipeline 104, the cooler water inlet pipeline 201 is connected between the water outlet port of the tower bottom water outlet pump 202 and the water inlet port of the water cooler 200, the tower top water treated with deamination in the deamination tower 100 is introduced into the water cooler 200 through the tower top water output pipeline 104 and the cooler water inlet pipeline 201 by the tower bottom water outlet pump 202, and the heat exchange effect of the heat exchange module is cooperated to make the tower top water cooled in the water cooler 200 and then discharged from the cooler water outlet pipeline 203 to the external tank area for storage;
[0027] Further, the steam condensation module includes a deamination tower condenser 300 and a deamination condensate tank 400, the water inlet port of the deamination tower condenser 300 is connected to a condenser air inlet pipeline 302 connected to the steam exhaust pipeline 103, and a condenser water outlet pipeline 301 is connected between the water outlet port of the deamination tower condenser 300 and the water inlet port of the deamination condensate tank 400. In this embodiment, the steam mixed with dimethylamine enters the deamination tower condenser 300 along the steam exhaust pipeline 103 and the condenser air inlet pipeline 302, and the heat exchange function of the heat exchange module is utilized to condense the steam into liquid in the deamination tower condenser 300, and then the steam is discharged from the condenser water outlet pipeline 301 to the deamination condensate tank 400 for storage, wherein the deamination condensate tank 400 can be equipped with a detector for detecting the dimethylamine concentration in the liquid to detect whether the dimethylamine concentration in the liquid has reached saturation;
[0028] It should be noted that a liquid tank outlet pipeline 401 is connected between the deamination condensate tank 400 and the tower top outlet pump 404, and a reflux pump 402 is connected between the liquid tank outlet pipeline 401 and the condensate reflux pipeline 105. The liquid tank outlet pipeline 401 cooperates with the reflux pump 402 and the condensate reflux pipeline 105 to transport the dimethylamine saturated liquid in the deamination condensate tank 400 to the deamination tower 100 for reuse in deamination treatment. The dimethylamine concentrated water discharge module includes a tower top outlet pump 404, and the water inlet port of the tower top outlet pump 404 is connected to the water outlet port of the deamination condensate tank 400. The water outlet port of the tower top outlet pump 404 is connected to the sewage treatment pipeline 403. When the dimethylamine concentration in the deamination condensate tank 400 reaches saturation, it can be transported to an external sewage treatment system through the sewage treatment pipeline 403 by the tower top outlet pump 404 for subsequent treatment.
[0029] At the same time, the heat exchange module includes a cold water outlet pipeline 500 and a cold water return pipeline 501. The cold water outlet pipeline 500 is respectively connected to the water inlet ends of the deamination tower condenser 300 and the water cooler 200, and the cold water return pipeline 501 is respectively connected to the water outlet ends of the deamination tower condenser 300 and the water cooler 200. The water inlet end of the cold water outlet pipeline 500 and the water outlet end of the cold water return pipeline 501 are both connected to an external cold water device. The cold water flows along the cold water outlet pipeline 500 into the deamination tower condenser 300 and the water cooler 200 for heat exchange. At the same time, the hot water that has undergone heat exchange in the deamination tower condenser 300 and the water cooler 200 flows along the cold water return pipeline 501 to the external cold water equipment for recovery, thereby achieving a cold water circulation supply.
[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A waste liquid deammoniation system, characterized in that: include: A deamination tower (100), wherein a tower top water input pipeline (101) and a steam input pipeline (102) are respectively connected to the deamination tower (100), wherein the tower top water input pipeline (101) is used to transport external tower top water to the inner cavity of the deamination tower (100), and the steam input pipeline (102) is used to transport external steam to the inner cavity of the deamination tower (100); A deamination tower top water cooling module, wherein a tower top water output pipeline (104) is provided between the deamination tower top water cooling module and the deamination tower (100), and the tower top water output pipeline (104) is used to transport the deamination tower top water discharged from the deamination tower (100) to the deamination tower top water cooling module; A steam condensation module, wherein a steam discharge pipeline (103) and a condensate return pipeline (105) are respectively provided between the steam condensation module and the deamination tower (100), wherein the steam discharge pipeline (103) is used to transport the steam discharged from the deamination tower (100) to the steam condensation module, and the condensate return pipeline (105) is used to transport the liquid condensed in the steam condensation module to the deamination tower (100); A dimethylamine concentrated water discharge module, which is used to discharge the dimethylamine concentrated water in the steam condensation module; A heat exchange module is connected to the deamination tower top water cooling module and the steam condensation module respectively, and is used for heat exchange between the deamination tower top water cooling module and the steam condensation water module.
2. A waste liquid deammoniation system according to claim 1, characterized in that: The deamination tower top water cooling module comprises: A water cooler (200), wherein a water outlet port of the water cooler (200) is connected to a cooler water outlet pipeline (203), and the cooler water outlet pipeline (203) is used to discharge the cooled deamination tower top water; A tower bottom water outlet pump (202), wherein the water inlet port of the tower bottom water outlet pump (202) is connected to the tower top water output pipeline (104), and a cooler water inlet pipeline (201) is connected between the water outlet port of the tower bottom water outlet pump (202) and the water inlet port of the water cooler (200).
3. A waste liquid deammoniation system according to claim 2, characterized in that: The steam condensation module comprises: A deamination tower condenser (300), wherein a water inlet port of the deamination tower condenser (300) is connected to a condenser air inlet pipeline (302) that is in communication with a steam exhaust pipeline (103); A deamination condensate tank (400), wherein a condenser water outlet pipeline (301) is connected between the water outlet port of the deamination tower condenser (300) and the water inlet port of the deamination condensate tank (400).
4. A waste liquid deammoniation system according to claim 3, characterized in that: The heat exchange module comprises a cold water outlet pipeline (500) and a cold water return pipeline (501), wherein the cold water outlet pipeline (500) is respectively connected to the water inlet ends of the deamination tower condenser (300) and the water cooler (200), and the cold water return pipeline (501) is respectively connected to the water outlet ends of the deamination tower condenser (300) and the water cooler (200).
5. A waste liquid deammoniation system according to claim 3, characterized in that: The dimethylamine concentrated water discharge module comprises a tower top water outlet pump (404), the water inlet port of the tower top water outlet pump (404) is connected to the water outlet port of the deammoniation condensate tank (400), and the water outlet port of the tower top water outlet pump (404) is connected to a sewage treatment pipeline (403).
6. A waste liquid deammoniation system according to claim 5, characterized in that: A liquid tank outlet pipeline (401) is connected between the deammoniation condensate tank (400) and the tower top outlet pump (404), and a reflux pump (402) is connected between the liquid tank outlet pipeline (401) and the condensate reflux pipeline (105).