Wastewater treatment and recovery device

Abstract

The utility model relates to a wastewater treatment and recovery device. The wastewater treatment and recovery device comprises a first recovery assembly and a second recovery assembly, the first recovery assembly comprises a first storage tank, a second storage tank, a first connecting pipeline, a second connecting pipeline and a first reaction kettle, the first reaction kettle comprises a first reaction kettle body, the first storage tank is communicated with the first reaction kettle body through the first connecting pipeline, and the second storage tank is communicated with the first reaction kettle body through the second connecting pipeline. The second recovery assembly comprises a third connecting pipeline, a second reaction kettle and an evaporative crystallization structure, the second reaction kettle comprises a second reaction kettle body, the second reaction kettle body is communicated with the first reaction kettle body through the third connecting pipeline, and the evaporative crystallization structure is communicated with the second reaction kettle body. According to the technical scheme, the problem that in the prior art, the recycling rate of recoverable components in waste water raw materials is low is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to a wastewater treatment and recovery device. BACKGROUND

[0002] The concentrations of chloride ions and sodium ions in industrial wastewater are relatively high, which not only leads to the inability of industrial wastewater to be reused, but also causes corrosion of equipment and pipelines, threatening production safety. Discharging wastewater containing chloride ions and sodium ions also causes pollution to water bodies, threatening ecological safety and the health of residents.

[0003] In the prior art (for example: application number: 202010662260.0, name: a method for reducing chloride ions in sodium persulfate production wastewater), wastewater containing chloride ions is first stored in a temporary storage tank, the wastewater in the temporary storage tank is transported by a first delivery pump and mixed with sulfuric acid in a certain proportion, a heat exchanger is used to heat the mixed solution, and then a second delivery pump is used to transport the mixed solution to a dechlorination tower, after the removal of chloride ions, the mixed solution is discharged from the dechlorination tower by a discharge pump, so that the content of chloride ions in the mixed solution is reduced. However, other components such as sodium ions in the mixed solution are directly discharged, which not only causes harm to the environment, but also causes waste of resources. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a wastewater treatment and recovery device to solve the problem of low recovery rate of recyclable components in wastewater raw materials in the prior art.

[0005] According to the wastewater treatment and recovery device provided by the present application, the first recovery component includes a first storage tank, a second storage tank, a first connecting pipeline, a second connecting pipeline and a first reaction kettle, the first reaction kettle includes a first reaction kettle body, the first storage tank is connected to the first reaction kettle body through the first connecting pipeline, and the second storage tank is connected to the first reaction kettle body through the second connecting pipeline. The second recovery component includes a third connecting pipeline, a second reaction kettle and an evaporation and crystallization structure, the second reaction kettle includes a second reaction kettle body, the second reaction kettle body is connected to the first reaction kettle body through the third connecting pipeline, and the evaporation and crystallization structure is connected to the second reaction kettle body.

[0006] In some embodiments, the first recovery component further includes two groups of delivery pumps, the first group of delivery pumps is located between the first storage tank and the first reaction kettle, the first group of delivery pumps is connected to the first connecting pipeline, and the second group of delivery pumps is located between the second storage tank and the first reaction kettle, the second group of delivery pumps is connected to the second connecting pipeline.

[0007] In some embodiments, the first reaction kettle further comprises a first stirring motor, a first stirring shaft and a plurality of first stirring blades, the first stirring motor is arranged above the first reaction kettle body, the first stirring motor is in transmission connection with a first end of the first stirring shaft, a second end of the first stirring shaft extends into the first reaction kettle body, and the plurality of first stirring blades are arranged on the first stirring shaft and located in the first reaction kettle body.

[0008] In some embodiments, the first recovery assembly further comprises a fourth connecting pipeline, a third storage tank and a fifth connecting pipeline, the third storage tank is in communication with the first reaction kettle body through the fourth connecting pipeline, and the fifth connecting pipeline is in communication with the third storage tank.

[0009] In some embodiments, the second recovery assembly further comprises a sixth connecting pipeline, and the sixth connecting pipeline is in communication with the second reaction kettle body.

[0010] In some embodiments, the communication position of the second connecting pipeline with the first reaction kettle body is above the communication position of the first connecting pipeline with the first reaction kettle body.

[0011] In some embodiments, the evaporation crystallization structure comprises a seventh connecting pipeline, a first-effect separator, a first-effect heater, a first circulating pipeline, a second circulating pipeline, a first-effect circulating pump, a first conveying pipeline and a first-effect transfer pump, a first feeding end of the first-effect heater is in communication with the second reaction kettle body through the seventh connecting pipeline, a feeding end of the first-effect separator is in communication with a discharging end of the first-effect heater through the first circulating pipeline, a first discharging end of the first-effect separator is in communication with a second feeding end of the first-effect heater through the second circulating pipeline, the first-effect circulating pump is arranged on the second circulating pipeline, the first conveying pipeline is in communication with a second discharging end of the first-effect separator, and the first-effect transfer pump is arranged on the first conveying pipeline.

[0012] In some embodiments, the first recovery assembly further comprises a first electromagnetic valve and a first flow meter, and the first electromagnetic valve and the first flow meter are arranged on the first connecting pipeline, the second recovery assembly further comprises a second electromagnetic valve, a second flow meter, a third electromagnetic valve and a third flow meter, and the second electromagnetic valve and the second flow meter are arranged on the second connecting pipeline, and the third electromagnetic valve and the third flow meter are arranged on the third connecting pipeline.

[0013] In some embodiments, the first reaction kettle further comprises an electric heating pipe, and the electric heating pipe is sleeved on the circumferential outer wall of the first reaction kettle body.

[0014] In some embodiments, the first reaction kettle and the second reaction kettle are both enamel reaction kettles.

[0015] The application discloses a wastewater treatment and recovery device. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings incorporated in and forming a part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, those drawings can also provide other drawings based on these drawings without any creative effort for those skilled in the art.

[0018] Figure 1 A structure schematic diagram of the wastewater treatment and recovery device in the embodiment of the present application is shown;

[0019] Figure 2 A step schematic diagram of recovering chlorine ions and sodium ions in the embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram of separating products in the embodiment of the present application is shown.

[0021] In the above drawings, the following reference signs are used:

[0022] 10, first recovery assembly; 11, first storage tank; 12, second storage tank; 13, first connecting pipeline; 14, second connecting pipeline; 15, first reactor; 151, first reactor body; 152, first stirring motor; 153, first stirring shaft; 154, first stirring blade; 16, delivery pump; 17, fourth connecting pipeline; 18, third storage tank; 19, fifth connecting pipeline; 20, second recovery assembly; 21, third connecting pipeline; 22, second reactor; 221, second reactor body; 23, evaporation crystallization structure; 231, seventh connecting pipeline; 232, primary separator; 233, primary heater; 234, first circulating pipeline; 235, second circulating pipeline; 236, primary circulating pump; 237, first delivery pipeline; 238, primary transfer pump; 24, sixth connecting pipeline; 25, second electromagnetic valve; 26, second flow meter. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0025] For ease of description, spatial relative terms such as "over", "above", "upper surface", "upper", and the like can be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned at 90 degrees or in other orientations in other different ways, and the spatial relative descriptions used herein are interpreted accordingly.

[0026] As Figure 1As shown, the embodiment relates to a wastewater treatment and recovery device, comprising: a first recovery assembly 10 and a second recovery assembly 20. The first recovery assembly 10 comprises a first storage tank 11, a second storage tank 12, a first connecting pipe 13, a second connecting pipe 14 and a first reaction kettle 15, the first reaction kettle 15 comprises a first reaction kettle body 151, the first storage tank 11 is connected with the first reaction kettle body 151 through the first connecting pipe 13, and the second storage tank 12 is connected with the first reaction kettle body 151 through the second connecting pipe 14. The second recovery assembly 20 comprises a third connecting pipe 21, a second reaction kettle 22 and an evaporation crystallization structure 23, the second reaction kettle 22 comprises a second reaction kettle body 221, the second reaction kettle body 221 is connected with the first reaction kettle body 151 through the third connecting pipe 21, and the evaporation crystallization structure 23 is connected with the second reaction kettle body 221.

[0027] The technical scheme of the embodiment is applied to the wastewater treatment and recovery device, which comprises: a first recovery assembly 10 and a second recovery assembly 20. The first recovery assembly 10 is used to recover chloride ions, and the second recovery assembly 20 is used to recover sodium ions. The first recovery assembly 10 comprises a first storage tank 11, a second storage tank 12, a first connecting pipe 13, a second connecting pipe 14 and a first reaction kettle 15. The first storage tank 11 stores wastewater raw materials, the second storage tank 12 stores concentrated sulfuric acid, the first reaction kettle 15 comprises a first reaction kettle body 151, the first storage tank 11 is connected with the first reaction kettle body 151 through the first connecting pipe 13, the second storage tank 12 is connected with the first reaction kettle body 151 through the second connecting pipe 14, and the wastewater raw materials and the concentrated sulfuric acid are transported into the first reaction kettle body 151 to perform a chemical reaction, so as to recover chloride ions from the wastewater. The second recovery assembly 20 comprises a third connecting pipe 21, a second reaction kettle 22 and an evaporation crystallization structure 23, the second reaction kettle 22 comprises a second reaction kettle body 221, the second reaction kettle body 221 is connected with the first reaction kettle body 151 through the third connecting pipe 21, the wastewater (wastewater raw materials after removing chloride ions) is transported from the first reaction kettle body 151 to the second reaction kettle body 221, the evaporation crystallization structure 23 is connected with the second reaction kettle body 221, and after the wastewater performs a chemical reaction in the second reaction kettle body 221, the wastewater is transported to the evaporation crystallization structure 23 to recover sodium ions. The technical scheme of the embodiment effectively solves the problem of low recovery rate of recoverable components in the wastewater raw materials in the prior art.

[0028] As Figure 1As shown in the drawings, in some embodiments, the first recovery assembly 10 further comprises two sets of conveying pumps 16, the first set of conveying pumps 16 is located between the first storage tank 11 and the first reaction kettle 15, the first set of conveying pumps 16 is communicated with the first connecting pipeline 13, and the first set of conveying pumps 16 is used for pumping the wastewater raw material into the first reaction kettle 15. The second set of conveying pumps 16 is located between the second storage tank 12 and the first reaction kettle 15, the second set of conveying pumps 16 is communicated with the second connecting pipeline 14, and the second set of conveying pumps 16 is used for conveying concentrated sulfuric acid into the first reaction kettle 15. The second set of conveying pumps 16 is selected from a high-pressure metering pump specially used for concentrated sulfuric acid, which has corrosion-resistant performance.

[0029] As shown in the drawings, Figure 1 In some embodiments, the first reaction kettle 15 further comprises a first stirring motor 152, a first stirring shaft 153 and a plurality of first stirring blades 154, the first stirring motor 152 is arranged above the first reaction kettle body 151, the first stirring motor 152 is drivingly connected with the first end of the first stirring shaft 153, the first stirring motor 152 drives the first stirring shaft 153 to rotate, the second end of the first stirring shaft 153 extends into the first reaction kettle body 151, the plurality of first stirring blades 154 are radially arranged on the first stirring shaft 153, and the plurality of first stirring blades 154 are located in the first reaction kettle body 151, the plurality of first stirring blades 154 rotate synchronously under the driving of the first stirring shaft 153, and the mixed solution of the wastewater raw material and the concentrated sulfuric acid in the first reaction kettle body 151 is stirred.

[0030] As shown in the drawings, Figure 1 , Figure 2 and Figure 3 In some embodiments, the first recovery assembly 10 further comprises a fourth connecting pipeline 17, a third storage tank 18 and a fifth connecting pipeline 19, the third storage tank 18 is communicated with the first reaction kettle body 151 through the fourth connecting pipeline 17, and the fifth connecting pipeline 19 is communicated with the third storage tank 18. It should be noted that the main component of the wastewater raw material is sodium chloride, so the sodium ions and chlorine ions in the wastewater raw material are recovered, which can greatly reduce the cost. The concentrated sulfuric acid and the wastewater raw material are conveyed into the first reaction kettle 15, the first reaction kettle is heated to make them fully react to generate sodium sulfate and hydrogen chloride gas. The hydrogen chloride gas is conveyed from the first reaction kettle body 151 into the third storage tank 18 through the fourth connecting pipeline 17, and the fifth connecting pipeline is used for introducing water, at which time the hydrogen chloride gas is dissolved in water to form hydrochloric acid.

[0031] As shown in the drawings, Figure 1 , Figure 2 and Figure 3As shown in the figure, in some embodiments, the excess concentrated sulfuric acid from the first reactor 15 enters the second reactor 22 through the third connecting pipe 21, and the second recovery assembly 20 further comprises a sixth connecting pipe 24, which is connected to the second reactor body 221. The sixth connecting pipe 24 is used to transport sodium hydroxide, and the input amount of sodium hydroxide should be sufficient to make the reaction with concentrated sulfuric acid more complete. The sodium hydroxide and the excess concentrated sulfuric acid in the second reactor perform a neutralization reaction to generate sodium sulfate and water, and at this time the water is evaporated by the evaporation crystallization structure, and the sodium sulfate crystals are precipitated, achieving the purpose of recovering sodium ions.

[0032] It should be further pointed out that the second reactor 22 further comprises a second stirring motor, a second stirring shaft and a plurality of second stirring blades. The second stirring motor is arranged above the second reactor body 221, the second stirring motor and the second end of the second stirring shaft are in transmission connection, the second stirring motor drives the second stirring shaft to rotate, the second end of the second stirring shaft extends into the second reactor body 221, and the plurality of second stirring blades are radially arranged on the second stirring shaft and located in the second reactor body 221. The plurality of second stirring blades rotate synchronously under the driving of the second stirring shaft, and the concentrated sulfuric acid and sodium hydroxide in the second reactor body 221 are stirred.

[0033] As shown in the figure, Figure 1 In some embodiments, since the density of sulfuric acid is greater than that of the wastewater raw material, the communication position of the second connecting pipe 14 with the first reactor body 151 is above the communication position of the first connecting pipe 13 with the first reactor body 151, so that the sulfuric acid can fully react with the wastewater raw material when flowing downward in the first reactor body 151.

[0034] As shown in the figure, Figure 1As shown, in some embodiments, the evaporation crystallization structure 23 includes a seventh connecting pipe 231, a first-effect separator 232, a first-effect heater 233, a first circulation pipe 234, a second circulation pipe 235, a first-effect circulation pump 236, a first conveying pipe 237, and a first-effect transfer pump 238. The first feed end of the first-effect heater 233 is connected to the second reactor body 221 via the seventh connecting pipe 231. The sodium sulfate solution is transported from the second reactor body 221 to the first-effect heater for heating via the seventh connecting pipe 231. The feed end of the first-effect separator 232 is connected to the discharge end of the first-effect heater 233 via the first circulation pipe 234. The heated sodium sulfate solution has an increased concentration in the first-effect separator 232, causing crystals to precipitate. The first discharge end of the first-effect separator 232 is connected to the second feed end of the first-effect heater 233 via the second circulation pipe 235. The first-effect circulation pump 236 is installed on the second circulation pipe 235, allowing the sodium sulfate solution to repeatedly flow, heat, and precipitate crystals. The first conveying pipe 237 is connected to the second discharge end of the first-effect separator 232. The first-effect transfer pump 238 is installed on the first conveying pipe 237. The sodium sulfate solution with increased concentration after evaporation is output from the first conveying pipe 237.

[0035] It should be noted that the above describes the primary evaporation crystallization of sodium sulfate solution. A secondary evaporation crystallization can be achieved by connecting an eighth connecting pipe to the first conveying pipe 237, and adding a second-effect separator, a second-effect heater, a third circulation pipe, a fourth circulation pipe, a second-effect circulation pump, a second conveying pipe, and a second-effect transfer pump. The specific connection and setup methods are the same as for primary evaporation crystallization and will not be repeated here. Tertiary and quadruple evaporation crystallization can be added as needed.

[0036] It should also be noted that when crystals are precipitated after one evaporation and crystallization, they are transported to the solid-liquid separation device by a discharge pump installed on the first conveying pipe 237 for solid-liquid separation.

[0037] like Figure 1 As shown, in some embodiments, the first recovery component 10 further includes a first solenoid valve and a first flow meter. Both the first solenoid valve and the first flow meter are installed on the first connecting pipe 13. The first flow meter can detect the inflow of wastewater raw materials and control the flow rate through the first solenoid valve. The second recovery component 20 further includes a second solenoid valve 25, a second flow meter 26, a third solenoid valve, and a third flow meter. Both the second solenoid valve 25 and the second flow meter 26 are installed on the second connecting pipe 14. The second flow meter 26 can detect the inflow of concentrated sulfuric acid and control the flow rate through the second solenoid valve 25. Both the third solenoid valve and the third flow meter are installed on the third connecting pipe 21. The third flow meter can detect the flow rate of excess concentrated sulfuric acid and control the flow rate through the third solenoid valve.

[0038] It should be noted that the wastewater treatment and recovery device further comprises a PLC controller, the first electromagnetic valve, the first flow meter, the second electromagnetic valve 25, the second flow meter 26, the third electromagnetic valve and the third flow meter are electrically connected with the PLC controller, the first flow meter, the second flow meter 26 and the third flow meter perform flow signal input, and the PLC controller controls the opening degree of the first electromagnetic valve, the second electromagnetic valve 25 and the third electromagnetic valve according to the signal.

[0039] In some embodiments, the first reaction kettle 15 further comprises an electric heating pipe sleeved on the circumferential outer wall of the first reaction kettle body 151, the electric heating pipe is electrically connected with the PLC controller, and the electric heating pipe is used to maintain the required reaction temperature in the first reaction kettle body 151. The first reaction kettle 15 and the second reaction kettle 22 are both enamel reaction kettles, which have corrosion-resistant performance.

[0040] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0041] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0042] The above is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wastewater treatment and recycling device, characterized in that, include: The first recycling component (10) includes a first storage tank (11), a second storage tank (12), a first connecting pipe (13), a second connecting pipe (14), and a first reaction vessel (15). The first reaction vessel (15) includes a first reaction vessel body (151). The first storage tank (11) is connected to the first reaction vessel body (151) through the first connecting pipe (13), and the second storage tank (12) is connected to the first reaction vessel body (151) through the second connecting pipe (14). The second recovery component (20) includes a third connecting pipe (21), a second reactor (22), and an evaporation crystallization structure (23). The second reactor (22) includes a second reactor body (221), which is connected to the first reactor body (151) through the third connecting pipe (21). The evaporation crystallization structure (23) is connected to the second reactor body (221).

2. The wastewater treatment and recycling device according to claim 1, characterized in that, The first recovery assembly (10) also includes two sets of transfer pumps (16). The first set of transfer pumps (16) is located between the first storage tank (11) and the first reactor (15) and is connected to the first connecting pipe (13). The second set of transfer pumps (16) is located between the second storage tank (12) and the first reactor (15) and is connected to the second connecting pipe (14).

3. The wastewater treatment and recycling device according to claim 1, characterized in that, The first reaction vessel (15) further includes a first stirring motor (152), a first stirring shaft (153), and a plurality of first stirring blades (154). The first stirring motor (152) is disposed above the vessel body (151) of the first reaction vessel. The first stirring motor (152) and the first end of the first stirring shaft (153) are connected by a drive. The second end of the first stirring shaft (153) extends into the vessel body (151) of the first reaction vessel. The plurality of first stirring blades (154) are radially disposed on the first stirring shaft (153), and the plurality of first stirring blades (154) are all located inside the vessel body (151) of the first reaction vessel.

4. The wastewater treatment and recycling device according to claim 1, characterized in that, The first recovery assembly (10) also includes a fourth connecting pipe (17), a third storage tank (18) and a fifth connecting pipe (19). The third storage tank (18) is connected to the first reactor body (151) through the fourth connecting pipe (17), and the fifth connecting pipe (19) is connected to the third storage tank (18).

5. The wastewater treatment and recycling device according to claim 1, characterized in that, The second recovery component (20) also includes a sixth connecting pipe (24), which is connected to the second reactor body (221).

6. The wastewater treatment and recycling device according to claim 1, characterized in that, The second connecting pipe (14) is connected to the first reactor body (151) at a position above the first connecting pipe (13) connected to the first reactor body (151).

7. The wastewater treatment and recycling device according to claim 1, characterized in that, The evaporation crystallization structure (23) includes a seventh connecting pipe (231), a first-effect separator (232), a first-effect heater (233), a first circulation pipe (234), a second circulation pipe (235), a first-effect circulation pump (236), a first conveying pipe (237), and a first-effect transfer pump (238). The first feed end of the first-effect heater (233) is connected to the second reactor body (221) through the seventh connecting pipe (231). The feed end of the first-effect separator (232) is connected to the first circulation pipe (237) through the second reactor body (221). The ring pipe (234) is connected to the discharge end of the first-effect heater (233). The first discharge end of the first-effect separator (232) is connected to the second inlet end of the first-effect heater (233) through the second circulation pipe (235). The first-effect circulation pump (236) is installed on the second circulation pipe (235). The first conveying pipe (237) is connected to the second discharge end of the first-effect separator (232). The first-effect transfer pump (238) is installed on the first conveying pipe (237).

8. The wastewater treatment and recycling device according to claim 1, characterized in that, The first recovery assembly (10) further includes a first solenoid valve and a first flow meter, both of which are mounted on the first connecting pipe (13). The second recovery assembly (20) further includes a second solenoid valve (25), a second flow meter (26), a third solenoid valve, and a third flow meter, both of which are mounted on the second connecting pipe (14), and both the third solenoid valve and the third flow meter are mounted on the third connecting pipe (21).

9. The wastewater treatment and recycling device according to claim 1, characterized in that, The first reactor (15) also includes an electric heating tube, which is sleeved on the circumferential outer wall of the reactor body (151).

10. The wastewater treatment and recycling device according to claim 1, characterized in that, Both the first reactor (15) and the second reactor (22) are enamel-lined reactors.

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