Organic wastewater treatment device and organic contaminated soil thermal desorption remediation system

Abstract

The utility model discloses an organic wastewater treatment device and an organic polluted soil thermal desorption repair system, and the organic wastewater treatment device comprises a wastewater pretreatment unit, a Fenton reaction unit, a deep adsorption unit, an online monitoring unit and a control unit, the wastewater pretreatment unit, the Fenton reaction unit and the deep adsorption unit are sequentially connected through a pipeline, the on-line monitoring unit is arranged in the Fenton reaction unit, the signal output end of the on-line monitoring unit is connected with the signal input end of the control unit, and the on-line monitoring unit is used for monitoring working parameters of the Fenton reaction unit on line. The monitored working parameters are transmitted to the control unit; the control signal output end of the control unit is electrically connected with the Fenton reaction unit, and the control unit is used for controlling the dosage of various medicaments in the Fenton reaction unit according to the received working parameters. According to the utility model, the oxidation reaction efficiency of organic matters in the organic wastewater can be effectively improved, so that the treatment effect of the organic wastewater is better.

Description

Technical Field

[0001] The utility model relates to the technical field of soil remediation organic wastewater treatment, in particular to an organic wastewater treatment device and an organic polluted soil thermal desorption and remediation system. Background Art

[0002] At present, organic pollutants in the soil mainly include volatile organic pollutants and semi-volatile organic pollutants such as petroleum hydrocarbons, halogenated hydrocarbons, pesticides, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and phthalates. How to solve the problem of soil pollution has always been a concern of governments and responsible private enterprises.

[0003] There are many methods for land remediation against industrial pollution. Indirect thermal desorption technology is one of the mainstream technologies for soil remediation of organic contaminated sites. Indirect thermal desorption technology heats the excavated contaminated soil to above the boiling point of the target pollutant through indirect heating, and selectively vaporizes and volatilizes the pollutants by controlling the system temperature and material residence time, so that the target pollutants are separated and removed from the soil particles. During the thermal desorption process, the contaminated soil continuously releases tail gas containing organic pollutants, which are absorbed by the cooling water in the spray tower to form organic wastewater, which needs to be treated before it can be discharged or reused.

[0004] The treatment of organic wastewater generated by thermal desorption of organic contaminated soil has always been a technical difficulty. A soil remediation high-concentration organic wastewater treatment system with application number CN201911349022.8 passes the high-concentration organic wastewater generated by soil remediation into an advanced oxidation tank (Fenton oxidation tank), uses the advanced oxidation tank to adjust the pH value and then oxidizes and decomposes the organic matter. The decomposed inorganic wastewater then passes through a sedimentation tank, where the wastewater is precipitated. The supernatant after precipitation passes through a filter to filter out the suspended solids, meet the discharge standards, and avoid direct discharge causing environmental pollution.

[0005] In this patent, in the process of adjusting the pH value of organic wastewater and oxidizing and decomposing organic matter through an advanced oxidation tank (Fenton oxidation tank), the amount of hydrogen peroxide and ferrous sulfate in the advanced oxidation tank, as well as the potential change during the Fenton reaction, chemical oxygen demand (COD) and other related parameters affecting the oxidation rate and oxidation effect cannot be detected in real time, resulting in low oxidation reaction efficiency and poor effect of organic matter in organic wastewater. Utility Model Content

[0006] The purpose of the utility model is to provide an organic wastewater treatment device and an organic contaminated soil thermal desorption remediation system, which can effectively improve the efficiency of the oxidation reaction of organic matter in the organic wastewater, so that the treatment effect of the organic wastewater is better.

[0007] In order to achieve the above-mentioned purpose of the utility model, according to the first aspect of the utility model, the utility model provides an organic wastewater treatment device, comprising a wastewater pretreatment unit, a Fenton reaction unit, a deep adsorption unit, an online monitoring unit and a control unit connected in sequence, wherein:

[0008] The water inlet of the wastewater pretreatment unit is used to receive organic wastewater generated by thermal desorption of organic contaminated soil, the water outlet of the wastewater pretreatment unit is connected to the water inlet of the Fenton reaction unit through a pipeline, the water outlet of the Fenton reaction unit is connected to the water inlet of the deep adsorption unit through a pipeline, and the water outlet of the deep adsorption unit is used to discharge treated water;

[0009] The online monitoring unit is arranged in the Fenton reaction unit, the signal output end of the online monitoring unit is connected to the signal input end of the control unit, and the online monitoring unit is used to monitor the working parameters of the Fenton reaction unit online and transmit the monitored working parameters to the control unit;

[0010] The control signal output end of the control unit is electrically connected to the Fenton reaction unit, and the control unit is used to control the dosage of various reagents in the Fenton reaction unit according to the received working parameters.

[0011] Preferably, the Fenton reaction unit comprises an acid adjustment tank, a reaction tank and a base adjustment tank connected in sequence through pipelines, wherein:

[0012] The acid adjustment tank has a reagent inlet, the reagent inlet of the acid adjustment tank is connected to a first reagent box through a pipeline, a first dosing pump is installed on the pipeline between the first reagent box and the reagent inlet of the acid adjustment tank, and the first reagent box is used to store acid reagents;

[0013] The reaction tank has two reagent inlets, one of which is connected to a second reagent box via a pipeline, a second dosing pump is installed on the pipeline between the second reagent box and the reagent inlet of the reaction tank, and the second reagent box is used to store ferrous sulfate; the other reagent inlet of the reaction tank is connected to a third reagent box via a pipeline, a third dosing pump is installed on the pipeline between the third reagent box and the reagent inlet of the reaction tank, and the third reagent box is used to store hydrogen peroxide;

[0014] The alkali adjustment tank has a reagent inlet, the reagent inlet of the alkali adjustment tank is connected to a fourth reagent box through a pipeline, a fourth dosing pump is installed on the pipeline between the fourth reagent box and the reagent inlet of the alkali adjustment tank, and the fourth reagent box is used to store alkaline reagents.

[0015] Preferably, the online monitoring unit comprises a first PH online analyzer, a COD online automatic analyzer, an online oxidation-reduction potential tester and a second PH online analyzer, wherein:

[0016] The first PH online analyzer is arranged at the water outlet of the acid adjustment tank, the online oxidation-reduction potential tester is arranged in the reaction tank, the COD online automatic analyzer is arranged at the water outlet of the reaction tank, and the second PH online analyzer is arranged at the water outlet of the alkali adjustment tank;

[0017] The signal output ends of the first PH online analyzer, COD online automatic analyzer, online redox potential tester and the second PH online analyzer are respectively connected to the signal input end of the control unit, and the control signal output end of the control unit is respectively connected to the first dosing pump, the second dosing pump, the third dosing pump and the fourth dosing pump.

[0018] Preferably, the acidic agent is sulfuric acid, and the alkaline agent is sodium hydroxide.

[0019] Preferably, the deep adsorption unit comprises a first buffer water tank, a flocculation tank, a sedimentation tank, a second buffer water tank, an activated carbon filter and a clean water tank which are sequentially connected by pipelines, wherein:

[0020] The water inlet of the first buffer water tank serves as the water inlet of the deep adsorption unit and is connected to the water outlet of the Fenton reaction unit through a pipeline. The water outlet of the clean water tank serves as the water outlet of the deep adsorption unit and is connected to a drainage pipeline to discharge the treated water to the target area.

[0021] Preferably, the bottom of the sedimentation tank is connected to a sludge drying tank.

[0022] Preferably, the deep adsorption unit further comprises a pipeline mixer, a PAC agent tank, a PAM agent tank, a fifth dosing pump and a sixth dosing pump, wherein:

[0023] The pipeline mixer is arranged on the pipeline between the first buffer water tank and the flocculation tank, the drug outlet of the PAC medicine box is connected to the water inlet of the pipeline mixer through a pipeline, the fifth dosing pump is installed at the drug outlet of the PAC medicine box, the drug outlet of the PAM medicine box is connected to the dosing port of the pipeline mixer through a pipeline, and the sixth dosing pump is installed at the drug outlet of the PAM medicine box.

[0024] Preferably, the deep adsorption unit further includes a first booster pump and a second booster pump, the first booster pump is arranged on the pipeline between the first buffer water tank and the pipeline mixer, and the second booster pump is arranged on the pipeline between the second buffer water tank and the activated carbon filter.

[0025] Preferably, the wastewater pretreatment unit comprises a grid sedimentation tank.

[0026] According to a second aspect of the utility model, the utility model provides an organic contaminated soil thermal desorption remediation system, comprising the organic wastewater treatment device described in any one of the first aspects above.

[0027] It can be seen from the above technical scheme that the utility model provides an organic wastewater treatment device and an organic contaminated soil thermal desorption remediation system. By setting a wastewater pretreatment unit, a Fenton reaction unit and a deep adsorption unit connected in sequence through pipelines, the organic matter in the organic wastewater generated by the thermal desorption of organic contaminated soil is treated, so that the organic wastewater meets the emission standards after treatment, and by setting an online monitoring unit and a control unit, the working parameters of the Fenton reaction unit are monitored online through the online monitoring unit set in the Fenton reaction unit, and the dosage of various reagents in the Fenton reaction unit is controlled by the control unit according to the received working parameters, thereby effectively improving the efficiency of the oxidation reaction of organic matter in the organic wastewater, so that the treatment effect of the organic wastewater is better.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] The above additional aspects and / or advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 This is a schematic structural diagram of an organic wastewater treatment device in a preferred embodiment of the utility model;

[0032] Figure 2 This is a structural schematic diagram of an organic wastewater treatment device in another preferred embodiment of the utility model;

[0033] Figure 3 It is a structural schematic diagram of a thermal desorption remediation system for organic contaminated soil in a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0034] 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 them. Based on the embodiments of 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.

[0035] like Figure 1-2 As shown, the embodiment of the utility model provides an organic wastewater treatment device, comprising a wastewater pretreatment unit 1, a Fenton reaction unit 2, a deep adsorption unit 3, an online monitoring unit 4 and a control unit 5 connected in sequence, wherein:

[0036] The water inlet of the wastewater pretreatment unit 1 is used to receive organic wastewater generated by thermal desorption of organic contaminated soil, the water outlet of the wastewater pretreatment unit 1 is connected to the water inlet of the Fenton reaction unit 2 through a pipeline, the water outlet of the Fenton reaction unit 2 is connected to the water inlet of the deep adsorption unit 3 through a pipeline, and the water outlet of the deep adsorption unit 3 is used to discharge the treated water;

[0037] The online monitoring unit 4 is arranged in the Fenton reaction unit 2, and the signal output end of the online monitoring unit 4 is connected to the signal input end of the control unit 5. The online monitoring unit 4 is used to monitor the working parameters of the Fenton reaction unit 2 online and transmit the monitored working parameters to the control unit 5;

[0038] The control signal output end of the control unit 5 is electrically connected to the Fenton reaction unit 2 , and the control unit 5 is used to control the dosage of various reagents in the Fenton reaction unit 2 according to the received working parameters.

[0039] The working principle of the organic wastewater treatment device of the utility model is as follows:

[0040] The organic wastewater generated by thermal desorption of organic polluted soil first enters the wastewater pretreatment unit 1, which performs pretreatment such as impurity filtration on the organic wastewater. The pretreated organic wastewater enters the Fenton reaction unit 2, and the Fenton reaction unit 2 oxidizes the organic pollutants that are difficult to degrade in the organic wastewater into inorganic substances through the Fenton reagent. During the Fenton reaction in the Fenton reaction unit 2, the online monitoring unit 4 realizes online monitoring of the working parameters of the Fenton reaction unit 2 (such as the pH value of the solution, the solution potential, the chemical oxygen demand, etc.), and the control unit 5 monitors the working parameters of the Fenton reaction unit 2 according to the online monitoring unit. The working parameters monitored by element 4 control the dosage of various reagents in the Fenton reaction unit 2, thereby ensuring that the dosage of each reagent is in an optimal range, effectively improving the efficiency of the oxidation reaction of organic matter in the organic wastewater, and making the treatment effect of organic wastewater better. The Fenton reaction unit 2 treats the organic wastewater into inorganic wastewater and then transports it to the deep adsorption unit 3. The deep adsorption unit 3 performs flocculation, precipitation, filtration and other treatments on the inorganic wastewater, and then separates and filters out the inorganic matter in the inorganic wastewater, so that the water finally discharged from the outlet of the deep adsorption unit 3 meets the discharge standard.

[0041] In summary, the present embodiment provides an organic wastewater treatment device, which realizes the treatment of organic matter in organic wastewater generated by thermal desorption of organic contaminated soil by setting a wastewater pretreatment unit 1, a Fenton reaction unit 2 and a deep adsorption unit 3 connected in sequence through pipelines, so that the organic wastewater meets the discharge standard after treatment, and by setting an online monitoring unit 4 and a control unit 5, the online monitoring unit 4 set in the Fenton reaction unit 2 is used to online monitor the working parameters of the Fenton reaction unit 2, and the control unit 5 controls the dosage of various reagents in the Fenton reaction unit 2 according to the received working parameters, thereby effectively improving the efficiency of the oxidation reaction of organic matter in the organic wastewater, so that the treatment effect of the organic wastewater is better.

[0042] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the Fenton reaction unit 2 includes an acid adjustment tank 201, a reaction tank 202 and a base adjustment tank 203 connected in sequence by pipelines, wherein:

[0043] The acid adjustment tank 201 has a reagent inlet, and the reagent inlet of the acid adjustment tank 201 is connected to the first reagent box 204 through a pipeline. A first dosing pump 208 is installed on the pipeline between the first reagent box 204 and the reagent inlet of the acid adjustment tank 201. The first reagent box 204 is used to store acid reagents;

[0044] The reaction tank 202 has two reagent inlets, one of which is connected to a second reagent box 205 through a pipeline, and a second dosing pump 209 is installed on the pipeline between the second reagent box 205 and the reagent inlet of the reaction tank 202, and the second reagent box 205 is used to store ferrous sulfate; the other reagent inlet of the reaction tank 202 is connected to a third reagent box 206 through a pipeline, and a third dosing pump 210 is installed on the pipeline between the third reagent box 206 and the reagent inlet of the reaction tank 202, and the third reagent box 206 is used to store hydrogen peroxide;

[0045] The alkali adjustment tank 203 has a reagent inlet, which is connected to a fourth reagent box 207 via a pipeline. A fourth dosing pump 211 is installed on the pipeline between the fourth reagent box 207 and the reagent inlet of the alkali adjustment tank 203. The fourth reagent box 207 is used to store alkaline reagents.

[0046] In this embodiment, after the organic wastewater undergoes Fenton reaction unit 2, it first enters the acid adjustment tank 201, the first dosing pump 208 is started to add the acid reagent in the first reagent box 204 to the acid adjustment tank 201, the stirring device of the acid adjustment tank 201 stirs the mixed solution to obtain the acid-adjusted organic wastewater, and the acid-adjusted organic wastewater further enters the reaction tank 202, the second dosing pump 209 and the third dosing pump 210 respectively add the ferrous sulfate in the second reagent box 205 and the hydrogen peroxide in the third reagent box 206 to the reaction tank 202, the stirring device of the reaction tank 202 stirs the mixed solution, the organic wastewater in the reaction tank 202 and the added hydrogen peroxide and ferrous sulfate undergo Fenton reaction, and the divalent iron ions in the hydrogen peroxide and ferrous sulfate are The mixed liquid oxidizes large molecular organic matter into small molecules, and oxidizes small molecular organic matter into carbon dioxide and water. At the same time, the divalent iron ions in ferrous sulfate can be oxidized into trivalent iron ions, which have a certain flocculation effect on organic wastewater. The trivalent iron ions become ferric hydroxide, which has a certain netting effect, thereby realizing the oxidation and decomposition of organic matter in organic wastewater into inorganic matter. The inorganic wastewater obtained after the organic wastewater is treated in the reaction tank 202 flows into the alkali adjustment tank 203, and the fourth dosing pump 211 is started to add the alkaline agent in the fourth agent box 207 into the alkali adjustment tank 203. The stirring device of the acid adjustment tank 201 stirs the mixed liquid evenly, and finally the inorganic wastewater after alkali adjustment is discharged to the next treatment unit (i.e., deep adsorption unit 3) through the water outlet of the alkali adjustment tank 203.

[0047] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the online monitoring unit 4 includes a first PH online analyzer 41, a COD online automatic analyzer 42, an online oxidation-reduction potential tester 43, and a second PH online analyzer 44, wherein:

[0048] The first PH online analyzer 41 is arranged at the water outlet of the acid adjustment tank 201, the online oxidation-reduction potential tester 43 is arranged in the reaction tank 202, the COD online automatic analyzer 42 is arranged at the water outlet of the reaction tank 202, and the second PH online analyzer 44 is arranged at the water outlet of the alkali adjustment tank 203;

[0049] The signal output ends of the first PH online analyzer 41, the COD online automatic analyzer 42, the online redox potential tester 43 and the second PH online analyzer 44 are respectively connected to the signal input end of the control unit 5, and the control signal output end of the control unit 5 is respectively connected to the first dosing pump 208, the second dosing pump 209, the third dosing pump 210 and the fourth dosing pump 211.

[0050] In this embodiment, during the operation of the Fenton reaction unit 2, the pH value of the mixed liquid at the outlet of the acid adjustment tank 201, the chemical oxygen demand in the reaction tank 202, the potential of the mixed liquid at the outlet of the reaction tank 202, and the pH value of the mixed liquid at the outlet of the alkali adjustment tank 203 are detected by the first pH online analyzer 41, the COD online automatic analyzer 42, the online redox potential tester 43, and the second pH online analyzer 44, respectively. The detected parameter values ​​are transmitted to the control unit 5 in real time. The control unit 5 outputs corresponding control instructions according to the corresponding preset threshold values ​​to control the first dosing pump 208, the second dosing pump 209, the third dosing pump 210, and the fourth dosing pump 211 to work respectively, thereby realizing dynamic adjustment of the addition amount of each agent such as acidic agent, hydrogen peroxide, ferrous sulfate, and alkaline agent, so as to ensure that the reaction rate and reaction effect of the Fenton reaction are optimal, and also realize real-time monitoring and automatic control of the working state of the Fenton reaction unit 2.

[0051] Specifically, the control unit 5 may be a PLC controller or an MCU controller.

[0052] Specifically, in this embodiment, the acidic agent is sulfuric acid, and the alkaline agent is sodium hydroxide.

[0053] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the deep adsorption unit 3 includes a first buffer water tank 301, a flocculation tank 302, a sedimentation tank 303, a second buffer water tank 304, an activated carbon filter 305 and a clean water tank 306 connected in sequence by pipelines, wherein:

[0054] The water inlet of the first buffer water tank 301 serves as the water inlet of the deep adsorption unit 3 and is connected to the water outlet of the Fenton reaction unit 2 through a pipeline. The water outlet of the clean water tank 306 serves as the water outlet of the deep adsorption unit 3 and is connected to a drainage pipeline to discharge the treated water to the target area.

[0055] In this embodiment, the deep adsorption unit 3 sequentially subjects the inorganic wastewater obtained by treating the organic wastewater with the Fenton reaction unit 2 to flocculation, sedimentation and filtration treatments, thereby achieving separation and filtration treatment of inorganic matter in the inorganic wastewater, and ultimately making the discharged water of the treated organic wastewater meet the corresponding emission standards.

[0056] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the bottom of the sedimentation tank 303 is connected to a sludge drying tank 307, and the sludge at the bottom of the sedimentation tank 303 is processed by the sludge drying tank 307 to facilitate the transportation of the sludge.

[0057] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the deep adsorption unit 3 further includes a pipeline mixer 308, a PAC agent tank 309, a PAM agent tank 310, a fifth dosing pump 311 and a sixth dosing pump 312, wherein,

[0058] The pipeline mixer 308 is arranged on the pipeline between the first buffer water tank 301 and the flocculation tank 302, the drug outlet of the PAC medicine box 309 is connected to the water inlet of the pipeline mixer 308 through a pipeline, the fifth dosing pump 311 is installed at the drug outlet of the PAC medicine box 309, the drug outlet of the PAM medicine box 310 is connected to the dosing port of the pipeline mixer 308 through a pipeline, and the sixth dosing pump 312 is installed at the drug outlet of the PAM medicine box 310.

[0059] In this embodiment, when the inorganic wastewater obtained by the treatment of the organic wastewater by the Fenton reaction unit 2 flows to the flocculation tank 302 through the first buffer water tank 301, the fifth dosing pump 311 and the sixth dosing pump 312 respectively add PAC (PolyAluminum Chloride) agent and PAM (Polyacrylamide) agent to the pipeline between the first buffer water tank 301 and the flocculation tank 302 and the pipeline mixer 308. PAC agent is an inorganic polymer coagulant, which is positively charged in acidic or alkaline media, so it is very effective to flocculate and precipitate the sewage with negatively charged suspended particles in the sewage, and clarify it; PAM agent is a non-ionic polymer flocculant, which has a huge surface adsorption effect by forming larger flocs between particles. Therefore, by sequentially adding PAC agent and PAM agent in the process of inorganic wastewater flowing from the first buffer water tank 301 to the flocculation tank 302, the flocculation effect is effectively improved, and the flocculation and separation of inorganic matter in the inorganic wastewater is better achieved.

[0060] like Figure 2As shown, based on the previous embodiment, in one embodiment, the deep adsorption unit 3 also includes a first boost pump 313 and a second boost pump 314, the first boost pump 313 is arranged on the pipeline between the first buffer water tank 301 and the pipeline mixer 308, and the second boost pump 314 is arranged on the pipeline between the second buffer water tank 304 and the activated carbon filter 305.

[0061] In this embodiment, by setting a first booster pump 313 on the pipeline between the first buffer water tank 301 and the pipeline mixer 308, and setting a second booster pump 314 on the pipeline between the second buffer water tank 304 and the activated carbon filter 305, the water flow pressure in the deep adsorption unit 3 is effectively increased, thereby increasing the water flow rate per unit time, and further improving the treatment efficiency of the deep adsorption unit 3 for inorganic wastewater.

[0062] like Figure 2 As shown, based on the previous embodiment, in one embodiment, the wastewater pretreatment unit 1 includes a grid sedimentation tank 11, and the organic wastewater generated by thermal desorption of organic contaminated soil enters the grid sedimentation tank 11 through the water inlet of the grid sedimentation tank 11 for impurity filtration and precipitation pretreatment. After precipitation, the upper clear liquid of the grid sedimentation tank 11 flows into the water inlet of the Fenton reaction unit 2 through the water outlet of the grid sedimentation tank 11.

[0063] like Figure 3 As shown, an embodiment of the utility model also provides an organic contaminated soil thermal desorption remediation system, which includes a soil indirect thermal desorption system 100, a spray tower 200, a wastewater collection tank 300, a lifting pump 400 and an organic wastewater treatment device 500 in any of the above embodiments connected in sequence.

[0064] The organic contaminated soil thermal desorption remediation system of this embodiment first performs thermal desorption treatment on the organic contaminated soil through the soil indirect thermal desorption system 100 to obtain organic contaminated tail gas. The organic contaminated tail gas is cooled by cooling water in the spray tower 200 to form organic wastewater that flows into the wastewater collection tank 300. The lifting pump 400 pumps the organic wastewater in the wastewater collection tank 300 to the organic wastewater treatment device 500 for treatment before discharge, thereby realizing the full-process treatment of organic pollutants in the organic contaminated soil.

[0065] It should be understood that the use of "system", "device", "unit" and / or "module" in this application is only a method for distinguishing different components, elements, parts, parts or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

[0066] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0067] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0068] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0069] If a flow chart is used in the present application, the flow chart is used to illustrate the operations performed by the system according to the embodiment of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, each step can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a certain step or several steps of operations can be removed from these processes.

[0070] The above is a detailed introduction to an organic wastewater treatment device and an organic contaminated soil thermal desorption remediation system provided by the utility model. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An organic wastewater treatment device, characterized in that: It includes wastewater pretreatment unit, Fenton reaction unit, deep adsorption unit, online monitoring unit and control unit, among which: The water inlet of the wastewater pretreatment unit is used to receive organic wastewater generated by thermal desorption of organic contaminated soil, the water outlet of the wastewater pretreatment unit is connected to the water inlet of the Fenton reaction unit through a pipeline, the water outlet of the Fenton reaction unit is connected to the water inlet of the deep adsorption unit through a pipeline, and the water outlet of the deep adsorption unit is used to discharge treated water; The online monitoring unit is arranged in the Fenton reaction unit, the signal output end of the online monitoring unit is connected to the signal input end of the control unit, and the online monitoring unit is used to monitor the working parameters of the Fenton reaction unit online and transmit the monitored working parameters to the control unit; The control signal output end of the control unit is electrically connected to the Fenton reaction unit, and the control unit is used to control the dosage of various reagents in the Fenton reaction unit according to the received working parameters.

2. The organic wastewater treatment device according to claim 1, characterized in that: The Fenton reaction unit comprises an acid adjustment tank, a reaction tank and a base adjustment tank which are sequentially connected by pipelines, wherein: The acid adjustment tank has a reagent inlet, the reagent inlet of the acid adjustment tank is connected to a first reagent box through a pipeline, a first dosing pump is installed on the pipeline between the first reagent box and the reagent inlet of the acid adjustment tank, and the first reagent box is used to store acid reagents; The reaction tank has two reagent inlets, one of which is connected to a second reagent box via a pipeline, a second dosing pump is installed on the pipeline between the second reagent box and the reagent inlet of the reaction tank, and the second reagent box is used to store ferrous sulfate; the other reagent inlet of the reaction tank is connected to a third reagent box via a pipeline, a third dosing pump is installed on the pipeline between the third reagent box and the reagent inlet of the reaction tank, and the third reagent box is used to store hydrogen peroxide; The alkali adjustment tank has a reagent inlet, the reagent inlet of the alkali adjustment tank is connected to a fourth reagent box through a pipeline, a fourth dosing pump is installed on the pipeline between the fourth reagent box and the reagent inlet of the alkali adjustment tank, and the fourth reagent box is used to store alkaline reagents.

3. The organic wastewater treatment device according to claim 2, characterized in that: The online monitoring unit includes a first PH online analyzer, a COD online automatic analyzer, an online oxidation-reduction potential tester, and a second PH online analyzer, wherein: The first PH online analyzer is arranged at the water outlet of the acid adjustment tank, the online oxidation-reduction potential tester is arranged in the reaction tank, the COD online automatic analyzer is arranged at the water outlet of the reaction tank, and the second PH online analyzer is arranged at the water outlet of the alkali adjustment tank; The signal output ends of the first PH online analyzer, COD online automatic analyzer, online redox potential tester and the second PH online analyzer are respectively connected to the signal input end of the control unit, and the control signal output end of the control unit is respectively connected to the first dosing pump, the second dosing pump, the third dosing pump and the fourth dosing pump.

4. The organic wastewater treatment device according to claim 2, characterized in that: The acidic agent is sulfuric acid, and the alkaline agent is sodium hydroxide.

5. The organic wastewater treatment device according to any one of claims 1 to 4, characterized in that: The deep adsorption unit comprises a first buffer water tank, a flocculation tank, a sedimentation tank, a second buffer water tank, an activated carbon filter and a clean water tank which are sequentially connected by pipelines, wherein: The water inlet of the first buffer water tank serves as the water inlet of the deep adsorption unit and is connected to the water outlet of the Fenton reaction unit through a pipeline. The water outlet of the clean water tank serves as the water outlet of the deep adsorption unit and is connected to a drainage pipeline to discharge the treated water to the target area.

6. The organic wastewater treatment device according to claim 5, characterized in that: The bottom of the sedimentation tank is connected with a sludge drying tank.

7. The organic wastewater treatment device according to claim 5, characterized in that: The deep adsorption unit also includes a pipeline mixer, a PAC agent tank, a PAM agent tank, a fifth dosing pump and a sixth dosing pump, wherein: The pipeline mixer is arranged on the pipeline between the first buffer water tank and the flocculation tank, the drug outlet of the PAC medicine box is connected to the water inlet of the pipeline mixer through a pipeline, the fifth dosing pump is installed at the drug outlet of the PAC medicine box, the drug outlet of the PAM medicine box is connected to the dosing port of the pipeline mixer through a pipeline, and the sixth dosing pump is installed at the drug outlet of the PAM medicine box.

8. The organic wastewater treatment device according to claim 7, characterized in that: The deep adsorption unit also includes a first booster pump and a second booster pump, wherein the first booster pump is arranged on the pipeline between the first buffer water tank and the pipeline mixer, and the second booster pump is arranged on the pipeline between the second buffer water tank and the activated carbon filter.

9. The organic wastewater treatment device according to claim 1 or 2 or 3 or 4 or 6 or 7 or 8, characterized in that: The wastewater pretreatment unit includes a grid sedimentation tank.

10. A thermal desorption remediation system for organic contaminated soil, characterized in that: The organic wastewater treatment device comprises the organic wastewater treatment device according to any one of claims 1 to 9.

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