阅读说明：本技术 一种基于Fenton催化氧化法的甲醛废水处理参数调配系统及其应用 (Fenton catalytic oxidation method-based formaldehyde wastewater treatment parameter allocation system and application thereof ) 是由 郑芳 于 2021-07-16 设计创作，主要内容包括：本发明属于环保领域,尤其涉及一种基于Fenton催化氧化法的甲醛废水处理参数调配系统及其应用。本发明提供的系统包括：双氧水药剂罐,硫酸亚铁溶液药剂罐,甲醛废水罐,第一控温液料罐,第二控温液料罐,芬顿反应器,温度控制装置,流量控制装置,甲醛浓度在线监测装置,pH值在线监测装置。在本发明中,通过调整系统运行时的参数条件,可以研究Fenton催化氧化法处理甲醛废水的动态反应过程中双氧水浓度、硫酸亚铁溶液浓度、反应pH值、反应时间、反应温度等参数条件对甲醛脱除效率的实时影响,从而快速、准确得知Fenton催化氧化法处理甲醛废水的最适宜参数条件,为Fenton催化氧化技术的实际工程应用提供技术指导。(The invention belongs to the field of environmental protection, and particularly relates to a formaldehyde wastewater treatment parameter allocation system based on a Fenton catalytic oxidation method and application thereof. The system provided by the invention comprises: the system comprises a hydrogen peroxide solution medicament tank, a ferrous sulfate solution medicament tank, a formaldehyde waste water tank, a first temperature control liquid tank, a second temperature control liquid tank, a Fenton reactor, a temperature control device, a flow control device, a formaldehyde concentration online monitoring device and a pH value online monitoring device. In the invention, by adjusting the parameter conditions during the operation of the system, the real-time influence of the parameter conditions such as hydrogen peroxide concentration, ferrous sulfate solution concentration, reaction pH value, reaction time, reaction temperature and the like on the formaldehyde removal efficiency in the dynamic reaction process of treating the formaldehyde wastewater by the Fenton catalytic oxidation method can be researched, so that the optimum parameter conditions for treating the formaldehyde wastewater by the Fenton catalytic oxidation method can be rapidly and accurately obtained, and technical guidance is provided for the practical engineering application of the Fenton catalytic oxidation technology.)

1. A formaldehyde wastewater treatment parameter allocation system based on a Fenton catalytic oxidation method is characterized by comprising the following steps:

a hydrogen peroxide agent tank, a ferrous sulfate solution agent tank and a formaldehyde wastewater tank;

the first temperature control liquid tank is connected with the liquid outlet of the hydrogen peroxide solution tank, and a liquid outlet metering pump of the hydrogen peroxide solution tank is arranged on a connecting pipeline of the first temperature control liquid tank;

a second temperature control liquid tank connected with the liquid outlet of the ferrous sulfate solution medicament tank and the liquid outlet of the formaldehyde waste water tank respectively, wherein a ferrous sulfate solution medicament tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the ferrous sulfate solution medicament tank and the second temperature control liquid tank, and a formaldehyde waste water tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the formaldehyde waste water tank and the second temperature control liquid tank;

the Fenton reactor is respectively connected with the liquid outlet of the first temperature control liquid tank and the liquid outlet of the second temperature control liquid tank, a first temperature control liquid tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the first temperature control liquid tank and the Fenton reactor, and a second temperature control liquid tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the second temperature control liquid tank and the Fenton reactor;

the temperature control device is used for regulating and controlling the temperatures of the first temperature control liquid tank, the second temperature control liquid tank and the Fenton reactor;

the flow control device is used for regulating and controlling the flow of the hydrogen peroxide agent tank liquid outlet metering pump, the ferrous sulfate solution agent tank liquid outlet metering pump, the formaldehyde wastewater tank liquid outlet metering pump, the first temperature control liquid tank liquid outlet metering pump and the second temperature control liquid tank liquid outlet metering pump;

the formaldehyde concentration on-line monitoring device is used for monitoring the formaldehyde concentration at the liquid outlet of the formaldehyde wastewater tank and the liquid outlet of the Fenton reactor;

and the pH value on-line monitoring device is used for monitoring the pH values of the liquid outlet of the formaldehyde wastewater tank and the liquid outlet of the Fenton reactor.

2. The formaldehyde wastewater treatment parameter adjusting system according to claim 1, wherein the Fenton reactor is provided with a plurality of liquid outlets along the height direction of the Fenton reactor, and each liquid outlet is provided with a valve.

3. The formaldehyde wastewater treatment parameter adjusting system according to claim 2, wherein the plurality of liquid outlets are arranged spirally along a height direction of the Fenton reactor.

4. The formaldehyde wastewater treatment parameter allocating system according to claim 1, further comprising a waste liquid storage tank, wherein a liquid inlet of the waste liquid storage tank is connected with a liquid outlet of the Fenton reactor.

5. The formaldehyde wastewater treatment parameter blending system according to claim 1, wherein a stirring device is disposed in the Fenton reactor.

6. The formaldehyde wastewater treatment parameter adjusting system according to claim 1, wherein the Fenton reactor is provided with a scale along a height direction thereof.

7. The formaldehyde wastewater treatment parameter blending system according to claim 1, wherein a stirring device is arranged in the first temperature-control liquid tank; and a stirring device is arranged in the second temperature control liquid tank.

8. The formaldehyde wastewater treatment parameter blending system according to claim 1, wherein the first temperature-control liquid tank is provided with a graduated scale along a height direction thereof; and the second temperature control liquid tank is provided with a graduated scale along the height direction.

9. The formaldehyde wastewater treatment parameter blending system according to claim 1, wherein the hydrogen peroxide agent tank is provided with a scale along the height direction thereof; the ferrous sulfate solution medicament tank is provided with a graduated scale along the height direction; the formaldehyde wastewater tank is provided with a graduated scale along the height direction.

10. A formaldehyde wastewater treatment parameter allocation method based on a Fenton catalytic oxidation method is characterized by comprising the following steps:

treating the formaldehyde wastewater in the formaldehyde wastewater treatment parameter allocation system of any one of claims 1 to 9, and adjusting the parameter conditions during treatment to obtain the formaldehyde removal efficiency under the corresponding parameter conditions.

Technical Field

The invention belongs to the field of environmental protection, and particularly relates to a formaldehyde wastewater treatment parameter allocation system based on a Fenton catalytic oxidation method and application thereof.

Background

Formaldehyde is a colorless, strongly irritating odor gas, readily soluble in water, capable of coagulating proteins, highly toxic to humans and warm-blooded animals, affecting the immune function of humans, and has been identified by the world health organization as a carcinogenic and teratogenic substance. The formaldehyde wastewater often contains substances such as alcohol, benzene, phenols and the like, and can inhibit the growth and propagation of microorganisms when the concentration of formaldehyde is low, and can denature proteins and make the microorganisms difficult to survive when the concentration of formaldehyde is high, so that the formaldehyde wastewater is difficult to degrade by the microorganisms. At present, the treatment method of formaldehyde wastewater is mainly a chemical method, including a condensation method, a coagulation method, an oxidation method, a blow-off method, a lime method and the like, wherein the oxidation method includes Fenton (Fenton) reagent oxidation, chlorine dioxide oxidation, wet oxidation and the like. In the aspects of degradation rate and harmlessness, the Fenton catalytic oxidation method is an effective method for removing formaldehyde wastewater, in particular to high-concentration formaldehyde waste liquid.

The Fenton reagent is prepared from H₂O₂And Fe²⁺The formed strong oxidant mainly utilizes high-activity OH free radicals to oxidize and degrade organic matters in wastewater, and realizes complete degradation of the organic matters in a short time, but a reaction system of a Fenton reagent is very complicated, and the final decomposition product is H₂O、O₂And Fe³⁺A large amount of particles are continuously settled before and after the reaction, the transparency of the solution is not high, and H₂O₂Concentration, FeSO₄The concentration, pH value, reaction time, reaction temperature and the like all influence the removal efficiency of the Fenton catalytic oxidation method.

The literatures Fenton oxidation method for deeply treating formaldehyde wastewater and Fenton oxidation-biological contact oxidation process for treating formaldehyde and urotropine wastewater adopt manual methods, a water sample and a Fenton reagent are directly added into a temporarily built beaker or a conical flask for reaction, after the reaction is finished, a supernatant is statically placed, the supernatant is treated, and the reagent is added, and then the content of formaldehyde in the water sample is measured by a spectrophotometry method. However, the traditional method has the following problems in the aspect of systematically exploring the matching and the selection of the formaldehyde wastewater treatment medicament:

1) failure to accurately study H₂O₂And FeSO₄The influence of concentration, pH value, reaction temperature and reaction time on the removal efficiency. The chemical reaction is a dynamic process, reagents are added into a beaker or a conical flask at one time, the concentration, the pH value and the temperature of each reagent are changed in real time along with the reaction, and the removal efficiency corresponding to the concentration, the pH value and the temperature of a certain reagent cannot be accurately known. In actual engineering, the dosage of the reagent directly influences the operation cost; pH and temperature pair removal during reactionThe efficiency is decisively influenced; the reaction time directly affects the investment cost and the operation cost of the project, and if the influence of each influence factor on the efficiency cannot be accurately known, the application of the actual engineering cannot be effectively guided.

2) The method has the advantages of large error, large artificial interference, low automation degree, low efficiency and influence on the accuracy and the applicability of research. The conventional research method is to manually perform experiments, including manually adding reagents, manually terminating the experiments, manually sampling and testing the content of formaldehyde, and the like, and the artificial influence factors are large, so that the repeatability of the experiments is poor.

Disclosure of Invention

In view of the above, the invention aims to provide a formaldehyde wastewater treatment parameter allocation system based on a Fenton catalytic oxidation method and application thereof, and the system provided by the invention can be used for researching the real-time influence of the parameter conditions such as hydrogen peroxide concentration, ferrous sulfate solution concentration, reaction pH value, reaction time, reaction temperature and the like on formaldehyde removal efficiency in the dynamic reaction process of treating formaldehyde wastewater by the Fenton catalytic oxidation method, so as to screen out the most appropriate formaldehyde wastewater treatment parameters; the system has the advantages of high automation degree, convenience, rapidness, good stability and accuracy.

The invention provides a formaldehyde wastewater treatment parameter allocation system based on a Fenton catalytic oxidation method, which comprises the following steps:

a hydrogen peroxide agent tank, a ferrous sulfate solution agent tank and a formaldehyde wastewater tank;

the first temperature control liquid tank is connected with the liquid outlet of the hydrogen peroxide solution tank, and a liquid outlet metering pump of the hydrogen peroxide solution tank is arranged on a connecting pipeline of the first temperature control liquid tank;

a second temperature control liquid tank connected with the liquid outlet of the ferrous sulfate solution medicament tank and the liquid outlet of the formaldehyde waste water tank respectively, wherein a ferrous sulfate solution medicament tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the ferrous sulfate solution medicament tank and the second temperature control liquid tank, and a formaldehyde waste water tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the formaldehyde waste water tank and the second temperature control liquid tank;

the Fenton reactor is respectively connected with the liquid outlet of the first temperature control liquid tank and the liquid outlet of the second temperature control liquid tank, a first temperature control liquid tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the first temperature control liquid tank and the Fenton reactor, and a second temperature control liquid tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the second temperature control liquid tank and the Fenton reactor;

the temperature control device is used for regulating and controlling the temperatures of the first temperature control liquid tank, the second temperature control liquid tank and the Fenton reactor;

the flow control device is used for regulating and controlling the flow of the hydrogen peroxide agent tank liquid outlet metering pump, the ferrous sulfate solution agent tank liquid outlet metering pump, the formaldehyde wastewater tank liquid outlet metering pump, the first temperature control liquid tank liquid outlet metering pump and the second temperature control liquid tank liquid outlet metering pump;

the formaldehyde concentration on-line monitoring device is used for monitoring the formaldehyde concentration at the liquid outlet of the formaldehyde wastewater tank and the liquid outlet of the Fenton reactor;

and the pH value on-line monitoring device is used for monitoring the pH values of the liquid outlet of the formaldehyde wastewater tank and the liquid outlet of the Fenton reactor.

Preferably, the fenton reactor is provided with a plurality of liquid outlets along the height direction thereof, and each liquid outlet is provided with a valve.

Preferably, the plurality of liquid outlets are spirally arranged along the height direction of the Fenton reactor.

Preferably, still include the waste liquid holding vessel, the inlet of waste liquid holding vessel with the liquid outlet of fenton's reactor is connected.

Preferably, a stirring device is arranged in the fenton reactor.

Preferably, the fenton reactor is provided with a scale along the height direction thereof.

Preferably, a stirring device is arranged in the first temperature control liquid tank; and a stirring device is arranged in the second temperature control liquid tank.

Preferably, the first temperature control liquid tank is provided with a graduated scale along the height direction; and the second temperature control liquid tank is provided with a graduated scale along the height direction.

Preferably, the hydrogen peroxide agent tank is provided with a graduated scale along the height direction; the ferrous sulfate solution medicament tank is provided with a graduated scale along the height direction; the formaldehyde wastewater tank is provided with a graduated scale along the height direction.

The invention provides a formaldehyde wastewater treatment parameter allocation method based on a Fenton catalytic oxidation method, which comprises the following steps:

the formaldehyde wastewater is treated in the formaldehyde wastewater treatment parameter allocation system in the technical scheme, and the parameter conditions during treatment are adjusted to obtain the formaldehyde removal efficiency under the corresponding parameter conditions.

Compared with the prior art, the invention provides a formaldehyde wastewater treatment parameter allocation system based on a Fenton catalytic oxidation method and application thereof. The system provided by the invention comprises: a hydrogen peroxide agent tank, a ferrous sulfate solution agent tank and a formaldehyde wastewater tank; the first temperature control liquid tank is connected with the liquid outlet of the hydrogen peroxide solution tank, and a liquid outlet metering pump of the hydrogen peroxide solution tank is arranged on a connecting pipeline of the first temperature control liquid tank; a second temperature control liquid tank connected with the liquid outlet of the ferrous sulfate solution medicament tank and the liquid outlet of the formaldehyde waste water tank respectively, wherein a ferrous sulfate solution medicament tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the ferrous sulfate solution medicament tank and the second temperature control liquid tank, and a formaldehyde waste water tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the formaldehyde waste water tank and the second temperature control liquid tank; the Fenton reactor is respectively connected with the liquid outlet of the first temperature control liquid tank and the liquid outlet of the second temperature control liquid tank, a first temperature control liquid tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the first temperature control liquid tank and the Fenton reactor, and a second temperature control liquid tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the second temperature control liquid tank and the Fenton reactor; the temperature control device is used for regulating and controlling the temperatures of the first temperature control liquid tank, the second temperature control liquid tank and the Fenton reactor; the flow control device is used for regulating and controlling the flow of the hydrogen peroxide agent tank liquid outlet metering pump, the ferrous sulfate solution agent tank liquid outlet metering pump, the formaldehyde wastewater tank liquid outlet metering pump, the first temperature control liquid tank liquid outlet metering pump and the second temperature control liquid tank liquid outlet metering pump; the formaldehyde concentration on-line monitoring device is used for monitoring the formaldehyde concentration at the liquid outlet of the formaldehyde wastewater tank and the liquid outlet of the Fenton reactor; and the pH value on-line monitoring device is used for monitoring the pH values of the liquid outlet of the formaldehyde wastewater tank and the liquid outlet of the Fenton reactor. In the invention, by adjusting the parameter conditions during the operation of the system, the real-time influence of the parameter conditions such as hydrogen peroxide concentration, ferrous sulfate solution concentration, reaction pH value, reaction time, reaction temperature and the like on the formaldehyde removal efficiency in the dynamic reaction process of treating the formaldehyde wastewater by the Fenton catalytic oxidation method can be researched, so that the optimum parameter conditions for treating the formaldehyde wastewater by the Fenton catalytic oxidation method can be rapidly and accurately obtained, and technical guidance is provided for the practical engineering application of the Fenton catalytic oxidation technology.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of a formaldehyde wastewater treatment parameter allocation system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a formaldehyde wastewater treatment parameter allocation system based on a Fenton catalytic oxidation method, which comprises the following steps:

a hydrogen peroxide agent tank, a ferrous sulfate solution agent tank and a formaldehyde wastewater tank;

the first temperature control liquid tank is connected with the liquid outlet of the hydrogen peroxide solution tank, and a liquid outlet metering pump of the hydrogen peroxide solution tank is arranged on a connecting pipeline of the first temperature control liquid tank;

a second temperature control liquid tank connected with the liquid outlet of the ferrous sulfate solution medicament tank and the liquid outlet of the formaldehyde waste water tank respectively, wherein a ferrous sulfate solution medicament tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the ferrous sulfate solution medicament tank and the second temperature control liquid tank, and a formaldehyde waste water tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the formaldehyde waste water tank and the second temperature control liquid tank;

the Fenton reactor is respectively connected with the liquid outlet of the first temperature control liquid tank and the liquid outlet of the second temperature control liquid tank, a first temperature control liquid tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the first temperature control liquid tank and the Fenton reactor, and a second temperature control liquid tank liquid outlet metering pump is arranged on a connecting pipeline between the liquid outlet of the second temperature control liquid tank and the Fenton reactor;

the temperature control device is used for regulating and controlling the temperatures of the first temperature control liquid tank, the second temperature control liquid tank and the Fenton reactor;

the flow control device is used for regulating and controlling the flow of the hydrogen peroxide agent tank liquid outlet metering pump, the ferrous sulfate solution agent tank liquid outlet metering pump, the formaldehyde wastewater tank liquid outlet metering pump, the first temperature control liquid tank liquid outlet metering pump and the second temperature control liquid tank liquid outlet metering pump;

the formaldehyde concentration on-line monitoring device is used for monitoring the formaldehyde concentration at the liquid outlet of the formaldehyde wastewater tank and the liquid outlet of the Fenton reactor;

and the pH value on-line monitoring device is used for monitoring the pH values of the liquid outlet of the formaldehyde wastewater tank and the liquid outlet of the Fenton reactor.

Referring to fig. 1, fig. 1 is a schematic view of a formaldehyde wastewater treatment parameter allocation system according to an embodiment of the present invention. Wherein, 1-1 is a hydrogen peroxide solution medicament tank, 1-2 is a ferrous sulfate solution medicament tank, 1-3 is a formaldehyde waste water tank, 2-1 is a first temperature control liquid tank, 2-2 is a second temperature control liquid tank, 3 is a Fenton reactor, 4 is a waste liquid storage tank, 5-1 is a hydrogen peroxide solution medicament tank liquid outlet metering pump, 5-2 is a ferrous sulfate solution medicament tank liquid outlet metering pump, 5-3 is a formaldehyde waste water tank liquid outlet metering pump, 5-4 is a first temperature control liquid tank liquid outlet metering pump, 5-5 is a second temperature control liquid tank liquid outlet metering pump, 6 is a temperature and flow control device, 7 is a formaldehyde concentration online monitoring device, 8 is a pH value online monitoring device, and 9 is a waste liquid discharge pipeline.

The invention provides a formaldehyde wastewater treatment parameter allocation system, which comprises: the device comprises a hydrogen peroxide agent tank (1-1), a ferrous sulfate solution agent tank (1-2), a formaldehyde wastewater tank (1-3), a first temperature control liquid tank (2-1), a second temperature control liquid tank (2-2), a Fenton reactor (3), a temperature control device, a flow control device, a formaldehyde concentration online monitoring device (7) and a pH value online monitoring device (8).

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, a hydrogen peroxide agent tank (1-1) is used for containing hydrogen peroxide; the hydrogen peroxide agent tank (1-1) is preferably provided with a graduated scale along the height direction; the hydrogen peroxide agent tank (1-1) is preferably provided with a sealing cover to avoid the volatilization of the contents; the material of the hydrogen peroxide agent tank (1-1) is preferably acid-alkali-resistant and corrosion-resistant polytetrafluoroethylene.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, a ferrous sulfate solution medicament tank (1-2) is used for containing a ferrous sulfate solution; the ferrous sulfate solution medicament tank (1-2) is preferably provided with a graduated scale along the height direction; the ferrous sulfate solution medicament tank (1-2) is preferably provided with a sealing cover to avoid volatilization of the contents; the ferrous sulfate solution medicament tank (1-2) is preferably made of acid-base-resistant and corrosion-resistant polytetrafluoroethylene.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, a formaldehyde wastewater tank (1-3) is used for containing formaldehyde wastewater; the formaldehyde wastewater tank (1-3) is preferably provided with a graduated scale along the height direction; the formaldehyde wastewater tank (1-3) is preferably provided with a sealing cover to avoid the volatilization of the contents; the material of the formaldehyde wastewater tank (1-3) is preferably acid-alkali-resistant and corrosion-resistant polytetrafluoroethylene.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, a liquid inlet of a first temperature control liquid tank (2-1) is connected with a liquid outlet of a hydrogen peroxide agent tank (1-1), and a liquid outlet metering pump (5-1) of the hydrogen peroxide agent tank (1-1) is arranged on a connecting pipeline of the first temperature control liquid tank and the hydrogen peroxide agent tank. In the invention, the first temperature control liquid tank (2-1) has heating and heat preservation functions and is used for preheating hydrogen peroxide, so that temperature fluctuation caused when the hydrogen peroxide subsequently enters the Fenton reactor (3) is reduced, and the influence of the reaction temperature on the formaldehyde removal efficiency is accurately researched. In the invention, a stirring device is preferably arranged in the first temperature-control liquid tank (2-1); the material of the first temperature control liquid tank (2-1) is preferably acid-alkali-resistant and corrosion-resistant polytetrafluoroethylene.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, a liquid inlet of the second temperature control liquid tank (2-2) is respectively connected with a liquid outlet of the ferrous sulfate solution medicament tank (1-2) and a liquid outlet of the formaldehyde wastewater tank (1-3), wherein a ferrous sulfate solution medicament tank liquid outlet metering pump (5-2) is arranged on a connecting pipeline of the second temperature control liquid tank (2-2) and the ferrous sulfate solution medicament tank (1-2), and a formaldehyde wastewater tank liquid outlet metering pump (5-3) is arranged on a connecting pipeline of the second temperature control liquid tank (2-2) and the formaldehyde wastewater tank (1-3). In the invention, the second temperature control liquid tank (2-2) has heating and heat preservation functions and is used for premixing and preheating the ferrous sulfate solution and the formaldehyde wastewater, and the temperature fluctuation caused when the mixed solution of the ferrous sulfate solution and the formaldehyde wastewater subsequently enters the Fenton reactor (3) can be reduced through preheating, so that the influence of the reaction temperature on the formaldehyde removal efficiency can be accurately researched. In the invention, a stirring device is preferably arranged in the second temperature control liquid tank (2-2); the material of the second temperature control liquid tank (2-2) is preferably acid-alkali-resistant and corrosion-resistant polytetrafluoroethylene material.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, the Fenton reactor (3) is used as the formaldehyde wastewater and FeSO₄And H₂O₂The reaction place has heating and heat preservation functions, and a liquid inlet of the reaction place is respectively connected with a liquid outlet of the first temperature control liquid tank (2-1) and a liquid outlet of the second temperature control liquid tank (2-2), wherein a first temperature control liquid tank liquid outlet metering pump (5-4) is arranged on a connecting pipeline of the Fenton reactor (3) and the first temperature control liquid tank (2-1), and a second temperature control liquid tank liquid outlet metering pump (5-5) is arranged on a connecting pipeline of the Fenton reactor (3) and the second temperature control liquid tank (2-2). In the present invention, the Fenton reactor (3) is preferablyA plurality of liquid outlets are arranged along the height direction of the liquid outlet, and each liquid outlet is provided with a valve; because the time required for the liquid level to reach the liquid outlets at different positions in the reaction process is different, namely the reaction time is different, the reaction time can be controlled by controlling the opening and closing of the valves of the liquid outlets at different positions, and the influence of different reaction times on the formaldehyde removal efficiency can be researched. In the invention, the multiple liquid outlets on the Fenton reactor (3) are preferably arranged spirally along the height direction of the Fenton reactor (3); the design can avoid the relevant interference of all valves in the operation, is convenient to operate and is beneficial to timely discharging of liquid. In the present invention, the fenton reactor (3) is preferably provided with a stirring device; the material of the Fenton reactor (3) is preferably acid-base-resistant and corrosion-resistant polytetrafluoroethylene.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, the temperature control device is used for regulating and controlling the temperatures of the first temperature control liquid tank (2-1), the second temperature control liquid tank (2-2) and the Fenton reactor (3). In the invention, by using the temperature control device, the influence of different reaction temperatures on the formaldehyde removal efficiency can be researched.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, the flow control device is used for regulating and controlling the flow of the hydrogen peroxide solution tank (1-1) liquid outlet metering pump (5-1), the ferrous sulfate solution tank (1-2) liquid outlet metering pump (5-2), the formaldehyde wastewater tank (1-3) liquid outlet metering pump (5-3), the first temperature control liquid tank (2-1) liquid outlet metering pump (5-4) and the second temperature control liquid tank (2-2) liquid outlet metering pump (5-5). In the invention, by utilizing the flow control device, the influence of different medicament proportioning dosages on the formaldehyde removal efficiency can be researched.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, the temperature control device and the flow control device are preferably integrated together, namely the temperature and flow control device (6) shown in fig. 1.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, the formaldehyde concentration online monitoring device (7) is used for monitoring the formaldehyde concentrations of the liquid outlets of the formaldehyde wastewater tanks (1-3) and the Fenton reactor (3), so that the formaldehyde removal efficiency is calculated. In the invention, the formaldehyde detection method adopted by the formaldehyde concentration online monitoring device (7) is preferably ultraviolet spectrophotometry.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, the pH value online monitoring device (8) is used for monitoring the pH values of the liquid outlets of the formaldehyde wastewater tanks (1-3) and the liquid outlet of the Fenton reactor (3), so that the influence of different reaction pH values on formaldehyde removal efficiency is researched.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, the system preferably further comprises a waste liquid storage tank (4), wherein a liquid inlet of the waste liquid storage tank (4) is connected with a liquid outlet of the Fenton reactor (3) and is used for containing liquid after the Fenton reaction, and then the liquid is treated and discharged in a unified manner, so that the environment pollution is avoided. In the invention, a liquid outlet of the waste liquid storage tank (4) is preferably connected with a waste liquid discharge pipeline (9); in the invention, the material of the waste liquid storage tank (4) is preferably acid-alkali-resistant and corrosion-resistant polytetrafluoroethylene.

In the formaldehyde wastewater treatment parameter allocation system provided by the invention, the connecting pipelines among the devices are preferably acid-base-resistant and corrosion-resistant polytetrafluoroethylene pipes.

The invention also provides a formaldehyde wastewater treatment parameter allocation method based on the Fenton catalytic oxidation method, which comprises the following steps:

the formaldehyde wastewater is treated in the formaldehyde wastewater treatment parameter allocation system in the technical scheme, and the parameter conditions during treatment are adjusted to obtain the formaldehyde removal efficiency under the corresponding parameter conditions.

The technical scheme provided by the invention can study the real-time influence of the parameter conditions such as hydrogen peroxide concentration, ferrous sulfate solution concentration, reaction pH value, reaction time, reaction temperature and the like on formaldehyde removal efficiency in the dynamic reaction process of treating formaldehyde wastewater by the Fenton catalytic oxidation method, so that the optimum parameter conditions for treating formaldehyde wastewater by the Fenton catalytic oxidation method can be quickly and accurately obtained, and guidance is provided for the practical engineering application of the Fenton catalytic oxidation technology. More specifically, the technical scheme provided by the invention has the following advantages:

1) the influence of different reagents on the formaldehyde removal efficiency can be researched by adjusting the concentration and the flow of the raw materials;

2) the influence of different temperatures on the formaldehyde removal efficiency can be researched by adjusting the temperatures of the liquid material tank and the reactor;

3) the influence of different reaction times on the formaldehyde removal efficiency can be studied by adjusting the residence time of the materials in the reactor.

4) The method has the advantages of high automation degree, convenience, rapidness, good repeatability and reliability, and can quickly determine the appropriate formaldehyde wastewater treatment parameter conditions.

For the sake of clarity, the following examples are given in detail.

Example 1

As shown in fig. 1, the present embodiment provides a formaldehyde wastewater treatment parameter allocation system, which includes: a hydrogen peroxide agent tank (1-1), a ferrous sulfate solution agent tank (1-2), a formaldehyde wastewater tank (1-3), a first temperature control liquid tank (2-1), a second temperature control liquid tank (2-2), a Fenton reactor (3), a waste liquid storage tank (4), a hydrogen peroxide agent tank effluent metering pump (5-1), a ferrous sulfate solution agent tank effluent metering pump (5-2), a formaldehyde wastewater tank effluent metering pump (5-3), a first temperature control liquid tank effluent metering pump (5-4), a second temperature control liquid tank effluent metering pump (5-5), a temperature and flow control device (6), a formaldehyde concentration online monitoring device (7), a pH value online monitoring device (8) and a waste liquid discharge pipeline (9), wherein the specific structure, material selection and connection relation of each device is introduced in the above, and will not be described in detail herein.

The system provided by the embodiment can be used for researching the H in the process of treating the formaldehyde wastewater by the Fenton catalytic oxidation method₂O₂And FeSO₄The method comprises the following steps of determining the optimal parameter conditions according to the influence of factors such as the dosage, the pH value in the reaction process, the reaction time, the reaction temperature and the like on the formaldehyde removal efficiency, wherein the specific steps are as follows:

preparing H with a certain concentration₂O₂Solution and FeSO₄The solution is respectively filled into a hydrogen peroxide solution tank (1-1) and a ferrous sulfate solution tank (1-2), and the formaldehyde wastewater to be treated is filled into a formaldehyde wastewater tank (1-3); opening a valve at the liquid outlet of the Fenton reactor (3) with a certain height, wherein the valve is arranged on the Fenton reactor (3)His outlet valve is closed; setting the temperatures of a first temperature control liquid tank (2-1), a second temperature control liquid tank (2-2) and a Fenton reactor (3), and starting a temperature control unit of a temperature and flow control device (6); starting a formaldehyde concentration online monitoring device (7) and a pH value online monitoring device (8); starting a stirring device of the first temperature control liquid tank (2-1), the second temperature control liquid tank (2-2) and the Fenton reactor (3); setting the flow rates of the metering pumps (5-1) - (5-5) through the flow rate control units of the temperature and flow rate control device (6) respectively, and starting the Fenton reaction; during the reaction, certain flow of FeSO₄The solution and the formaldehyde wastewater enter a second temperature control liquid tank (2-2), are uniformly stirred by a stirring device and then flow into a Fenton reactor (3); h in hydrogen peroxide agent tank (1-1)₂O₂The solution flows through the first temperature control liquid tank (2-1) at a certain flow rate and then enters the Fenton reactor (3) to react with FeSO in the Fenton reactor (3)₄And CH₂Performing O reaction, wherein after the reaction is carried out for a certain time, the liquid level in the Fenton reactor (3) reaches an overflow liquid level at a certain height, the reacted waste liquid overflows into a waste liquid storage tank (4) through a liquid outlet at a corresponding height, and simultaneously, the formaldehyde concentration of the liquid outlet of the formaldehyde waste water tank (1-3) and the formaldehyde concentration of the liquid outlet of the Fenton reactor (3) are monitored in real time through a formaldehyde concentration online monitoring device (7), and the formaldehyde removal efficiency is calculated;

in the above steps provided in this example, different concentrations of H were prepared₂O₂Solution, FeSO₄Adjusting the liquid outlet flow of the hydrogen peroxide solution tank (1-1), the ferrous sulfate solution tank (1-2) and the formaldehyde waste water tank (1-3), and researching the influence of different reagent ratios on the formaldehyde waste water removal efficiency; the influence of different reaction temperatures on the formaldehyde waste liquid removal efficiency can be researched by adjusting the temperatures of the first temperature control liquid tank (2-1), the second temperature control liquid tank (2-2) and the Fenton reactor (3); the influence of different reaction times on the formaldehyde waste liquid removal efficiency can be researched by adjusting the height of the liquid outlet of the Fenton reactor (3); by monitoring the pH value in real time, the removal efficiency of the formaldehyde waste liquid at different pH values can be determined; by adjusting the parameters, the most suitable medicament ratio, pH value and reaction temperature in the process of treating the formaldehyde wastewater by the Fenton catalytic oxidation method can be quickly and accurately obtainedAnd reaction time.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.