Perchlorate wastewater treatment device

Abstract

The utility model discloses a perchlorate wastewater treatment device, which consists of a coagulating sedimentation unit, an oxidation reaction unit and a deep adsorption unit which are connected in sequence, and the coagulating sedimentation unit consists of a first delivery pump, a coagulating reaction tank, a buffer tank and a filter press which are connected in sequence; the oxidation reaction unit is composed of an oxidation reaction tank, a neutralization precipitation tank and a thickener which are connected in sequence, and the deep adsorption unit comprises an activated carbon filter. The utility model has the advantages that: 1, the structure is simple; 2, the up-to-standard discharge of perchlorate is realized; and 3, the method has the advantages of low cost, high efficiency, stable effluent quality and the like, and is suitable for treating a large amount of high-concentration perchlorate wastewater for a long time.

Description

Technical Field

[0001] The utility model belongs to the field of wastewater treatment, and in particular relates to a perchlorate wastewater treatment device. Background Art

[0002] Perchlorates are strong oxidants with a wide range of applications, especially in the aerospace and fireworks industries.

[0003] Because perchlorate is highly soluble, it is easily released into surface water and the atmosphere during industrial production and use, and then migrates to soil, drinking water and vegetation, causing large-scale pollution. So far, water sources in many parts of the world have been found to be contaminated with perchlorate, and even drinking water, tea, meat products, vegetables and fruits have been detected in varying concentrations of perchlorate. Perchlorate enters the human body through diet and drinking water, which can interfere with thyroid function, affect brain development, and endanger human health.

[0004] As research on perchlorate environmental pollution continues to deepen, the problem of perchloric acid pollution has attracted high attention worldwide, and relevant supervision efforts are also being strengthened, especially for pollution prevention and control of perchlorate production and fireworks manufacturing companies.

[0005] Due to the high water solubility and difficulty in degradation of perchlorate, it is difficult to effectively remove it through conventional wastewater treatment processes. Currently, the main treatment methods for perchlorate are roughly divided into physical treatment, chemical treatment and biological treatment.

[0006] Physical methods for treating perchlorate wastewater include adsorption, ion exchange, and membrane filtration. The adsorbent capacity in the adsorption method is limited, and improper disposal of the discarded adsorbent will cause secondary pollution. The membrane filtration method is expensive and difficult to put into large-scale practical applications. The resin in the ion exchange method is difficult to regenerate, and the high-concentration brine produced needs further treatment.

[0007] Chemical treatment of perchlorate wastewater requires the use of expensive catalysts and harsh reaction conditions, and there are still many problems to be solved before industrial application.

[0008] The technology of biological treatment for degrading perchlorate wastewater is suitable for treating large-scale industrial wastewater, but it has the disadvantages of long reaction cycle, harsh operating conditions and high treatment cost. Utility Model Content

[0009] Purpose of the utility model: The utility model makes improvements on the problems existing in the above-mentioned prior art, that is, the utility model discloses a perchlorate wastewater treatment device.

[0010] The utility model adopts "coagulation and sedimentation unit + oxidation reaction unit + deep adsorption unit" as the process flow, quickly removes perchlorate in the wastewater by chemical precipitation in the coagulation and sedimentation unit, then oxidizes it in the oxidation reaction unit, and finally deeply purifies it by the deep adsorption unit (activated carbon filter), so as to realize efficient treatment of perchlorate wastewater.

[0011] Technical solution: A perchlorate wastewater treatment device, consisting of a coagulation and sedimentation unit, an oxidation reaction unit and a deep adsorption unit connected in sequence, wherein:

[0012] The coagulation and sedimentation unit is composed of the following components:

[0013] The first delivery pump;

[0014] A coagulation reaction tank, wherein the liquid outlet of the first delivery pump is connected to the liquid inlet of the coagulation reaction tank through a pipeline, the liquid outlet of the first reagent dosing device is connected to the liquid inlet of the coagulation reaction tank through a first pipeline, and a first metering pump is provided in the first pipeline;

[0015] A buffer tank, wherein the liquid outlet of the coagulation reaction tank is connected to the liquid inlet of the buffer tank through a second pipeline, and the liquid outlet of the second agent dosing device is connected to the second pipeline through a third pipeline, and a second metering pump is provided in the third pipeline;

[0016] A filter press, wherein the liquid outlet of the buffer tank is connected to the liquid inlet of the filter press through a fourth pipeline;

[0017] The oxidation reaction unit is composed of the following components:

[0018] An oxidation reaction tank, wherein the liquid outlet of the filter press is connected to the liquid inlet of the oxidation reaction tank through a fifth pipeline, the liquid outlet of the third reagent dosing device is connected to the liquid inlet of the oxidation reaction tank through a sixth pipeline, a third metering pump is provided in the sixth pipeline, and a fourth reagent dosing device is connected to the liquid inlet of the oxidation reaction tank through a seventh pipeline, and a fourth metering pump is provided in the seventh pipeline;

[0019] A neutralization precipitation tank, wherein the liquid outlet of the oxidation reaction tank is connected to the liquid inlet of the neutralization precipitation tank through a pipeline, and a fifth reagent dosing device is connected to the liquid inlet of the neutralization precipitation tank through an eighth pipeline, and a fifth metering pump is provided in the eighth pipeline;

[0020] A thickener, wherein the liquid outlet of the neutralization sedimentation tank is connected to the liquid inlet of the thickener through a ninth pipeline, the liquid outlet of the sixth reagent dosing device is connected to the ninth pipeline through a tenth pipeline, a sixth metering pump is provided in the tenth pipeline, a bottom discharge valve is provided at the bottom of the thickener, and the bottom discharge valve is connected to the feed port of the filter press through a slurry discharge pipe;

[0021] The deep adsorption unit comprises an activated carbon filter, and the liquid outlet of the upper layer of the thickener is connected to the liquid inlet of the activated carbon filter through an eleventh pipeline.

[0022] Furthermore, a second delivery pump is provided in the fourth pipeline.

[0023] Furthermore, the filter press is a plate and frame filter press.

[0024] Furthermore, the fifth pipeline is provided with a first filtrate buffer tank and a third delivery pump in sequence along the flow direction of the liquid.

[0025] Furthermore, the eleventh pipeline is provided with a second filtrate buffer tank and a fourth delivery pump in sequence along the liquid flow direction.

[0026] Furthermore, the deep adsorption unit also includes a water outlet tank, and the liquid outlet of the activated carbon filter is connected to the liquid inlet of the water outlet tank.

[0027] Furthermore, the coagulation reaction tank, the buffer tank, the oxidation reaction tank, and the neutralization sedimentation tank are all provided with stirring devices.

[0028] Furthermore, the oxidation reaction tank and the neutralization precipitation tank are respectively equipped with a liquid level meter, a pH meter and an ORP meter.

[0029] Furthermore, the first medicament dosing device, the second medicament dosing device, the third medicament dosing device, the fourth medicament dosing device, the fifth medicament dosing device, and the sixth medicament dosing device are respectively provided with a stirrer and a liquid level meter.

[0030] Beneficial effects: The perchlorate wastewater treatment device disclosed in the utility model has the following beneficial effects:

[0031] 1. Simple structure;

[0032] 2. Rapid removal of perchlorate in wastewater is achieved through coagulation and sedimentation units, and perchlorate is discharged up to standard in combination with oxidation reaction units and deep adsorption units, solving the problems of complex process operation, low treatment efficiency and high equipment cost for perchlorate wastewater;

[0033] 3. The device has the advantages of low cost, high efficiency and stable effluent quality, and is suitable for treating large amounts of high-concentration perchlorate wastewater for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of a perchlorate wastewater treatment device disclosed in the utility model.

[0035] in:

[0036] 1- Coagulation reaction tank 2-Oxidation reaction tank 3-Activated carbon filter 11-First delivery pump 12-Buffer tank 13- Second delivery pump 14-Filter press 15-First filtrate buffer tank 16-First agent dosing device 17- Second agent dosing device 21- The third delivery pump 22-Neutralization sedimentation tank 23-Thickener 24-Second filtrate buffer tank 25-Third agent dosing device 26-Fourth agent dosing device 27-Fifth agent dosing device 28-Sixth Medicament Dosing Device 31-Fourth delivery pump 32-Outlet water tank 161-First metering pump 171-Second metering pump 251-Third metering pump 261-Fourth metering pump 271-Fifth metering pump 281-Sixth metering pump DETAILED DESCRIPTION

[0037] The specific implementation modes of the present utility model are described in detail below.

[0038] The "range" disclosed in the utility model is defined in the form of a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of a particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10 to 50 is listed for a specific parameter, it is understood that the range of 10 to 40 and 20 to 50 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In this application, unless otherwise specified, the range of values ​​"a to b" represents an abbreviation of any real number combination between a and b, where a and b are both real numbers. For example, the range of values ​​"0 to 5" means that all real numbers between "0 to 5" have been fully listed in this article, and "0 to 5" is only an abbreviation of these numerical combinations.

[0039] If not otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0040] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0041] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0042] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0043] Unless otherwise specified, the reaction is carried out at room temperature and pressure.

[0044] Unless otherwise specified, all parts or percentages are by weight.

[0045] In the present invention, all substances used are known substances and can be purchased or synthesized by known methods.

[0046] In the present invention, the devices or equipment used are all conventional devices or equipment known in the field and can be purchased.

[0047] like Figure 1 As shown, a perchlorate wastewater treatment device is composed of a coagulation and sedimentation unit, an oxidation reaction unit and a deep adsorption unit connected in sequence, wherein:

[0048] The coagulation and sedimentation unit is composed of the following components:

[0049] A first delivery pump 11;

[0050] The coagulation reaction tank 1, the liquid outlet of the first delivery pump 11 is connected to the liquid inlet of the coagulation reaction tank 1 through a pipeline, the liquid outlet of the first reagent dosing device 16 is connected to the liquid inlet of the coagulation reaction tank 1 through a first pipeline, and the first metering pump 161 is provided in the first pipeline;

[0051] The buffer tank 12, the liquid outlet of the coagulation reaction tank 1 is connected to the liquid inlet of the buffer tank 12 through a second pipeline, the liquid outlet of the second agent dosing device 17 is connected to the second pipeline through a third pipeline, and the third pipeline is provided with a second metering pump 171;

[0052] The filter press 14, the liquid outlet of the buffer tank 12 is connected to the liquid inlet of the filter press 14 through a fourth pipeline;

[0053] The oxidation reaction unit is composed of the following components:

[0054] The liquid outlet of the filter press 14 is connected to the liquid inlet of the oxidation reaction tank 2 through a fifth pipeline, the liquid outlet of the third agent dosing device 25 is connected to the liquid inlet of the oxidation reaction tank 2 through a sixth pipeline, a third metering pump 251 is provided in the sixth pipeline, and the fourth agent dosing device 26 is connected to the liquid inlet of the oxidation reaction tank 2 through a seventh pipeline, and a fourth metering pump 261 is provided in the seventh pipeline;

[0055] A neutralization sedimentation tank 22, wherein the liquid outlet of the oxidation reaction tank 2 is connected to the liquid inlet of the neutralization sedimentation tank 22 through a pipeline, and a fifth reagent dosing device 27 is connected to the liquid inlet of the neutralization sedimentation tank 22 through an eighth pipeline, and a fifth metering pump 271 is provided in the eighth pipeline;

[0056] The thickener 23, the liquid outlet of the neutralization sedimentation tank 22 is connected to the liquid inlet of the thickener 23 through a ninth pipeline, the liquid outlet of the sixth reagent dosing device 28 is connected to the ninth pipeline through a tenth pipeline, a sixth metering pump 281 is provided in the tenth pipeline, and a bottom discharge valve is provided at the bottom of the thickener 23, and the bottom discharge valve is connected to the feed port of the filter press 14 through a slurry discharge pipe;

[0057] The deep adsorption unit includes an activated carbon filter 3, and the thickener 23 is provided with an overflow port. The liquid outlet (overflow port) of the upper layer of the thickener 23 is connected to the liquid inlet of the activated carbon filter 3 through an eleventh pipeline.

[0058] The upper water outlet of the thickener 23 is communicated with the water inlet of the activated carbon filter 3 .

[0059] Furthermore, a second delivery pump 13 is provided in the fourth pipeline. The second delivery pump 13 supplies material to the filter press 14.

[0060] Furthermore, the filter press 14 is a plate and frame filter press.

[0061] Furthermore, the fifth pipeline is provided with a first filtrate buffer tank 15 and a third delivery pump 21 in sequence along the flow direction of the liquid. The first filtrate buffer tank 15 is used for temporarily storing the filtrate separated by the filter press 14. The third delivery pump 21 is used for feeding the oxidation reaction tank 2.

[0062] Furthermore, the eleventh pipeline is provided with a second filtrate buffer tank 24 and a fourth delivery pump 31 in sequence along the liquid flow direction. The second filtrate buffer tank 24 is used for temporarily storing the filtrate separated by the thickener 23. The fourth delivery pump 31 is used for feeding the activated carbon filter 3.

[0063] Furthermore, the deep adsorption unit further comprises a water outlet tank 32 , and the liquid outlet of the activated carbon filter 3 is connected to the liquid inlet of the water outlet tank 32 .

[0064] Furthermore, the coagulation reaction tank 1 , the buffer tank 12 , the oxidation reaction tank 2 , and the neutralization sedimentation tank 22 are all provided with stirring devices.

[0065] Furthermore, the oxidation reaction tank 2 and the neutralization precipitation tank 22 are respectively installed with a liquid level meter, a pH meter and an ORP meter.

[0066] Furthermore, the first medicament dosing device 16 , the second medicament dosing device 17 , the third medicament dosing device 25 , the fourth medicament dosing device 26 , the fifth medicament dosing device 27 , and the sixth medicament dosing device 28 are respectively provided with a stirrer and a liquid level meter.

[0067] The delivery pipelines of the first agent dosing device 16, the second agent dosing device 17, the third agent dosing device 25, the fourth agent dosing device 26, the fifth agent dosing device 27 and the sixth agent dosing device 28 are respectively provided with a first metering pump 161, a second metering pump 171, a third metering pump 251, a fourth metering pump 261, a fifth metering pump 271 and a sixth metering pump 281 for controlling the dosage and addition rate of the agents.

[0068] The implementation process of the utility model is further described in detail below:

[0069] The wastewater containing perchlorate enters the coagulation sedimentation tank 1 through the first delivery pump 11, overflows into the buffer tank 12 after coagulation reaction, and then enters the filter press 14 through the second delivery pump 13. The separated filtrate enters the first filtrate buffer tank 15 for temporary storage, and then enters the oxidation reaction tank 2 and the neutralization sedimentation tank 22 in sequence through the third delivery pump 21 to complete the oxidation reaction. After separation by the thickener 23, the filtrate enters the second filtrate buffer tank 24 for temporary storage, and then enters the activated carbon filter 3 through the fourth delivery pump 31 for deep purification. The purified filtrate is the final effluent and enters the effluent tank 32 for temporary storage.

[0070] The first agent dosing device 16 / the second agent dosing device 17 / the third agent dosing device 25 / the fourth agent dosing device 26 / the fifth agent dosing device 27 / the sixth agent dosing device 28 are respectively provided with agitators and liquid level meters. After the agents are prepared as required, they are respectively delivered to the corresponding reaction tanks via the first metering pump 161 / the second metering pump 171 / the third metering pump 251 / the fourth metering pump 261 / the fifth metering pump 271 / the sixth metering pump 281.

[0071] The above describes the implementation of the present invention in detail. However, the present invention is not limited to the above implementation, and various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A perchlorate wastewater treatment device, characterized in that: It consists of a coagulation and sedimentation unit, an oxidation reaction unit and a deep adsorption unit connected in sequence. Composition, of which: The coagulation and sedimentation unit is composed of the following components: The first delivery pump; A coagulation reaction tank, wherein the liquid outlet of the first delivery pump is connected to the liquid inlet of the coagulation reaction tank through a pipeline, the liquid outlet of the first reagent dosing device is connected to the liquid inlet of the coagulation reaction tank through a first pipeline, and a first metering pump is provided in the first pipeline; A buffer tank, wherein the liquid outlet of the coagulation reaction tank is connected to the liquid inlet of the buffer tank through a second pipeline, and the liquid outlet of the second agent dosing device is connected to the second pipeline through a third pipeline, and a second metering pump is provided in the third pipeline; A filter press, wherein the liquid outlet of the buffer tank is connected to the liquid inlet of the filter press through a fourth pipeline; The oxidation reaction unit is composed of the following components: An oxidation reaction tank, wherein the liquid outlet of the filter press is connected to the liquid inlet of the oxidation reaction tank through a fifth pipeline, the liquid outlet of the third reagent dosing device is connected to the liquid inlet of the oxidation reaction tank through a sixth pipeline, a third metering pump is provided in the sixth pipeline, and a fourth reagent dosing device is connected to the liquid inlet of the oxidation reaction tank through a seventh pipeline, and a fourth metering pump is provided in the seventh pipeline; A neutralization precipitation tank, wherein the liquid outlet of the oxidation reaction tank is connected to the liquid inlet of the neutralization precipitation tank through a pipeline, and a fifth reagent dosing device is connected to the liquid inlet of the neutralization precipitation tank through an eighth pipeline, and a fifth metering pump is provided in the eighth pipeline; A thickener, wherein the liquid outlet of the neutralization sedimentation tank is connected to the liquid inlet of the thickener through a ninth pipeline, the liquid outlet of the sixth reagent dosing device is connected to the ninth pipeline through a tenth pipeline, a sixth metering pump is provided in the tenth pipeline, a bottom discharge valve is provided at the bottom of the thickener, and the bottom discharge valve is connected to the feed port of the filter press through a slurry discharge pipe; The deep adsorption unit comprises an activated carbon filter, and the liquid outlet of the upper layer of the thickener is connected to the liquid inlet of the activated carbon filter through an eleventh pipeline.

2. A perchlorate wastewater treatment device as claimed in claim 1, characterized in that: A second delivery pump is arranged in the fourth pipeline.

3. A perchlorate wastewater treatment device as claimed in claim 1, characterized in that: The filter press is a plate and frame filter press.

4. A perchlorate wastewater treatment device as claimed in claim 1, characterized in that: The fifth pipeline is provided with a first filtrate buffer tank and a third delivery pump in sequence along the flow direction of the liquid.

5. A perchlorate wastewater treatment device as claimed in claim 1, characterized in that: The eleventh pipeline is provided with a second filtrate buffer tank and a fourth delivery pump in sequence along the liquid flow direction.

6. A perchlorate wastewater treatment device as claimed in claim 1, characterized in that: The deep adsorption unit also includes a water outlet tank, and the liquid outlet of the activated carbon filter is connected to the liquid inlet of the water outlet tank.

7. A perchlorate wastewater treatment device as claimed in claim 1, characterized in that: The coagulation reaction tank, the buffer tank, the oxidation reaction tank and the neutralization sedimentation tank are all provided with stirring devices.

8. A perchlorate wastewater treatment device as claimed in claim 1, characterized in that: The oxidation reaction tank and the neutralization precipitation tank are respectively equipped with a liquid level meter, a pH meter and an ORP meter.

9. A perchlorate wastewater treatment device as claimed in claim 1, characterized in that: The first medicament dosing device, the second medicament dosing device, the third medicament dosing device, the fourth medicament dosing device, the fifth medicament dosing device, and the sixth medicament dosing device are respectively provided with a stirrer and a liquid level meter.

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