CN204529549U - A kind of acid fracturing Waste Water Treatment - Google Patents

Abstract

The utility model discloses a kind of acid fracturing Waste Water Treatment, belong to field of industrial waste water treatment.Advanced oxidation, flocculation sediment, filtration and Adsorption Phase is utilized to combine process acidification of oil field fracturing wastewater.Described system comprises the retention basin that pipeline connects, breakdown of emulsion pond, light electrolysis-Fenton coupling reaction tank, alkalization settling tank, hay tank and adsorption tanks.The utility model Waste Water Treatment treatment scheme is simple, and processing cost is lower, easy and simple to handle, effectively reduces the impact that acid fracturing Wastewater on Ecological Environmental causes.

Description

A treatment system for acidified fracturing wastewater

technical field

The utility model belongs to the technical field of sewage treatment, in particular to an acidification fracturing wastewater treatment process flow system.

Background technique

Acid fracturing operation is one of the main measures to increase production of oil and gas wells. The wastewater discharged during the operation contains guar gum, formaldehyde, petroleum and other various additives. If it is discharged without treatment, it will pollute the surrounding environment. Acidified fracturing wastewater has the characteristics of high COD _Cr , high stability, high viscosity, etc., and it is difficult to meet the standard treatment. It has become the focus and difficulty of the environmental protection standard treatment of industrial sewage in oil and gas fields.

At present, the widely used treatment methods are mainly oxidation treatment, coagulation treatment, Fe/C micro-electrolysis biological method and combination of various treatment methods. These technologies have some defects more or less, such as complex treatment facilities; cumbersome process; expensive treatment costs; or due to high technical feasibility requirements, difficult to implement on-site and other issues and cannot be applied.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the above-mentioned prior art and provide an acidified fracturing wastewater treatment system. The utility model has reasonable design, good treatment effect, can effectively treat acidified fracturing wastewater, and the treated water can be directly discharged or recycled Note down.

In order to achieve the above object, the technical solution adopted by the utility model is: an acidified fracturing wastewater treatment system, which is characterized in that it consists of a water storage tank, a demulsification tank, a micro-electrolysis-Fenton coupling reaction tank, an alkalization sedimentation tank, a filter tank and The adsorption tank is connected by pipelines and valves in turn, among which: a constant flow pump is installed on the connecting pipeline between the water storage tank and the demulsification tank, a booster pump is installed on the connecting pipeline between the alkalization sedimentation tank and the filter tank, and the constant flow pump Metering pump A is installed on the connecting pipeline between the demulsification tank and the demulsification tank, and metering pump B is installed on the connecting pipeline between the demulsification tank and the micro-electrolysis-Fenton coupling reaction tank. There is a metering pump C on the connecting pipeline between them.

Wherein, on the connecting pipeline between the constant flow pump and the demulsification tank, the potassium persulfate in the potassium persulfate solution tank is added to the waste water through the metering pump A, and the mixed reaction is carried out with an agitator in the demulsification tank; in the demulsification tank On the connecting pipeline between the micro-electrolysis-Fenton coupling reaction tank, the hydrogen peroxide in the hydrogen peroxide tank is added to the wastewater through the metering pump B, and the oxidation reaction is carried out in the micro-electrolysis-Fenton coupling reaction tank; in the micro-electrolysis-Fenton coupling reaction tank On the connecting pipeline with the alkalization sedimentation tank, the lye in the alkali tank is added to the waste water through the metering pump C, and the coagulation and sedimentation are carried out in the alkalization sedimentation tank.

Sponge iron activated carbon mixed filler is housed in the micro-electrolysis-Fenton coupling reaction tank; Quartz sand filler is housed in the described filter tank; Activated carbon filler is housed in the described adsorption tank.

Compared with the prior art, the utility model has the following advantages:

1. The utility model reduces the viscosity of acidified fracturing wastewater through demulsification, which is convenient for subsequent treatment; the micro-electrolysis-Fenton coupling technology is used to oxidize and remove organic matter, and this technology can add an appropriate amount of H ₂ O ₂ solution to the wastewater treated by micro-electrolysis. The Fe ²⁺ produced by the reaction with micro-electrolysis constitutes Fenton’s reagent. Fe ²⁺ can not only catalyze and decompose to produce OH with strong oxidation ability, but also generate Fe ³⁺ with good flocculation and adsorption. In addition, H ₂ O ₂ is micro The catalyst for the electrolysis reaction can accelerate the micro-electrolysis reaction and improve the efficiency.

2. The utility model can form iron hydroxide flocs with micro-electrolysis-Fenton coupling technology Fe ³⁺ by adding alkali, and further remove organic matter through flocculation and precipitation; fine flocs can be removed through filter tanks; a little remaining organic matter can be removed Through the adsorption and removal of activated carbon in the adsorption tank, the effluent can be discharged up to the standard or reinjected into the ground.

3. The utility model integrates redox, flocculation adsorption, catalytic oxidation, electrodeposition and co-deposition, etc., and can realize chain breaking of macromolecular organic pollutants and further remove refractory organic matter.

4. The utility model has reasonable design and good treatment effect, and can effectively treat acidified fracturing wastewater.

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the utility model.

Labels in the figure: 1-water storage tank; 2-demulsification tank; 3-micro-electrolysis-Fenton coupling reaction tank; 4-alkaline sedimentation tank; 5-filter tank; 6-adsorption tank; 7-constant flow pump; 8- Booster pump; 9‐potassium persulfate solution tank; A10‐metering pump; B10‐metering pump; C10‐metering pump; 11‐hydrogen peroxide tank; 12‐activated carbon filler; 13‐alkali tank; 14‐quartz sand filler; 15‐ Sponge iron activated carbon mixed filler; 16‐stirrer.

Detailed ways

Below by accompanying drawing and embodiment, the utility model is described in further detail. This is to enable those skilled in the art to understand the utility model more clearly, but does not limit the protection scope of the utility model.

The acidified fracturing waste water flows into the storage tank (1) by itself, and is pumped into the demulsification tank (2) by a constant flow pump (7). During the process, the potassium persulfate solution tank (9) Potassium persulfate is added, and the demulsification of the acidified fracturing wastewater is completed through the mixing reaction of the agitator (16) in the demulsification tank (2), reducing its viscosity; then enters the micro-electrolysis-Fenton coupling reaction tank (3), and passes through Metering pump B (10) injects the hydrogen peroxide in the hydrogen peroxide tank (11), and under the joint action of hydrogen peroxide and sponge iron activated carbon mixed filler (15), the oxidation reaction is carried out to remove most of the organic matter; subsequently, the metering pump C (10 ) adding the lye (calcium hydroxide aqueous solution or sodium hydroxide aqueous solution) in the alkali tank (13) to the waste water to react to generate iron hydroxide flocs, which are precipitated in the alkalization sedimentation tank (4) to further remove organic matter; then , under the action of the booster pump (8), the wastewater enters the filter tank (5) equipped with quartz sand filler (14) to remove fine flocs, and then passes through the adsorption tank (6) equipped with activated carbon filler (12) to reach the standard discharge or re-inject into the ground.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (3)

1. an acid fracturing Waste Water Treatment, it is characterized in that by retention basin (1), breakdown of emulsion pond (2), Wei electricity Xie ?Fenton coupling reaction tank (3), alkalization settling tank (4), hay tank (5) and adsorption tanks (6) are connected to form by pipeline and valve successively, wherein: the connecting pipeline between retention basin (1) and breakdown of emulsion pond (2) is provided with constant flow pump (7), connecting pipeline between alkalization settling tank (4) and hay tank (5) is provided with topping-up pump (8), connecting pipeline between constant flow pump (7) and breakdown of emulsion pond (2) is provided with volume pump A (10), breakdown of emulsion pond (2) and Wei electricity Xie ?connecting pipeline between Fenton coupling reaction tank (3) be provided with volume pump B (10), Wei electricity Xie ?connecting pipeline between Fenton coupling reaction tank (3) and alkalization settling tank (4) be provided with volume pump C (10).

2. according to acid fracturing Waste Water Treatment according to claim 1, it is characterized in that: on the connecting pipeline between constant flow pump (7) and breakdown of emulsion pond (2), by volume pump A (10), the Potassium Persulphate in potassium persulfate solution tank (9) is added in waste water, carry out hybrid reaction at breakdown of emulsion pond (2) middle agitator (16); Breakdown of emulsion pond (2) and Wei electricity Xie ?on connecting pipeline between Fenton coupling reaction tank (3), by volume pump B (10), the hydrogen peroxide in dioxygen water pot (11) is added in waste water, separate in ?Fenton coupling reaction tank (3) at micro-electricity and carry out oxidizing reaction; Wei electricity Xie ?on connecting pipeline between Fenton coupling reaction tank (3) and alkalization settling tank (4), by volume pump C (10), the alkali lye in alkali tank (13) is added in waste water, in alkalization settling tank (4), carry out coagulating sedimentation.

3., according to acid fracturing Waste Water Treatment according to claim 1, it is characterized in that: described Wei electricity Xie ?sponge iron gac mixed fillers (15) is housed in Fenton coupling reaction tank (3); Quartz sand filler (14) is housed in described hay tank (5); Active carbon filler (12) is housed in described adsorption tanks (6).