CN205151985U - Oil drilling effluent disposal system - Google Patents

Abstract

The utility model discloses an oil drilling effluent disposal system, including the storage tank, a filte, the charge pump, evaporation plant, the concentrate circulating pump, the storage tank is used for deposiing well drilling waste water, the filter passes through the inner chamber intercommunication of pipeline and storage tank, a tiny particle impurity for filtering fall well drilling waste water, the charge pump passes through duct and filter and connects, a well drilling waste water for extracting in the storage tank, evaporation plant passes through the pipeline and is connected with the charge pump, be used for carrying out evaporative concentration to well drilling waste water, the concentrate circulating pump passes through the pipeline and is connected with evaporation plant, a concentrate for extracting among the evaporation plant, the concentrate circulating pump passes through the pipeline and is connected with the storage tank, save in being used for injecting the concentrate into storage tank. This system of utilization handles the oil drilling waste, can realize the useless evaporation of water of well drilling under the circumstances that consumes a small amount of electric energy, atmosphere pollution and underground water pollution that the sewage direct expansion that has avoided shining at present the pond again causes.

Description

Oil Drilling Wastewater Treatment System

technical field

The utility model relates to the technical field of drilling wastewater treatment, in particular to a petroleum drilling wastewater treatment system.

Background technique

Drilling wastewater is one of the main pollutants in the petroleum industry. It is mainly a multiphase stable suspension composed of clay, drilling cuttings, weighting materials, chemical additives, inorganic salts, and oil. The pH value is high, and the direct discharge will pollute the environment. Serious, and the complex and changeable components make it difficult to deal with biological and chemical methods. The method of evaporation to treat drilling wastewater has been initially applied in oil drilling sites, and the treatment effect is good. As a purely physical method, no additional chemicals are added, and the comprehensive environmental protection benefits are good.

Although the physical evaporation process is effective in treating oil drilling wastewater, it needs to consume a lot of heat or electricity, and the processing cost is very high. At present, the energy consumption of energy-saving mechanical compression evaporation process for treating one ton of drilling wastewater is also more than 50 kWh; Moreover, drilling sites, especially oil fields in remote areas and offshore oil fields, may not be able to provide enough heat or electricity, which restricts the application of physical evaporation methods in drilling wastewater treatment.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a petroleum drilling wastewater treatment system, which can realize the evaporation of the drilling wastewater while consuming a small amount of electric energy, and avoid the current drying pool Air pollution and groundwater pollution caused by direct evaporation of sewage.

The purpose of this utility model is achieved in that:

A petroleum drilling wastewater treatment system, comprising a drilling wastewater storage tank, a filter, a feed pump, an evaporator, and a concentrated liquid circulation pump, the drilling wastewater storage tank is used to settle the drilling wastewater so that large particles in the drilling wastewater Impurities settle at the bottom of the tank, and the water inlet end of the filter communicates with the inner cavity of the drilling wastewater storage tank through a pipeline to filter out small particles of impurities in the drilling wastewater. The water outlet of the filter is connected to extract the drilling wastewater in the drilling wastewater storage tank. The evaporation device is connected to the feed pump through a pipeline for evaporating and concentrating the drilling wastewater. The water inlet of the concentrated liquid circulation pump It is connected to the evaporating device through a pipeline for extracting the concentrated liquid in the evaporating device, and the outlet end of the concentrated liquid circulation pump is connected with the drilling wastewater storage tank through a pipeline for injecting the concentrated liquid into the drilling wastewater storage tank for storage.

In order to realize the evaporation and separation of drilling wastewater, preferably, the evaporation device includes an evaporation separator, a heat transfer oil circulation pump, and a solar heat collector, and the evaporation separator includes a drilling wastewater storage chamber and a heat transfer oil circulation chamber. The oil circulation chamber covers the drilling waste water holding chamber, and is used to heat the drilling waste water in the drilling waste water holding chamber. The drilling waste water holding chambers are respectively connected to the feed pump and the concentrate circulation pump through pipelines. The heat transfer oil circulation chambers are respectively The heat transfer oil circulation pump and the solar heat collector are connected through pipes, and the heat transfer oil circulation pump and the solar heat collector are connected through pipes. The solar heat collector is used to heat the passing heat transfer oil. The heat transfer oil circulation pump is used for It is used to circulate the heat transfer oil in the evaporator.

Preferably, the solar thermal collector is a trough solar thermal collector. Ordinary solar collectors use a flat-plate heat-absorbing surface. Due to heat convection and other losses between the heat-absorbing surface and the outside world, it is difficult for this type of heat collector to reach the medium and high temperature range above 150°C. Due to the small temperature difference, the evaporation heating surface required for the evaporation of wastewater The area is relatively large. In order to improve the utilization rate of solar energy, the trough solar heat collection technology is applied. The temperature of the heat transfer oil produced by it can reach 400 ℃, which meets the process requirements of wastewater evaporation, and the evaporation area is small, saving space.

In order to recover the heat energy of the steam generated by the evaporative separator, and improve the utilization rate of heat energy and the evaporation efficiency, preferably, a preheater is also included, the preheater includes a drilling waste water passage chamber and a condensation chamber, and the condensation chamber covers the drilling waste water passage chamber, It is used to preheat the drilling waste water in the drilling waste water passage chamber, the drilling waste water passage chamber is respectively connected to the feed pump and the drilling waste water holding chamber through pipelines, and the drilling waste water holding chamber of the evaporative separator is provided with a steam outlet, The steam outlet is connected to the steam inlet of the condensing cavity of the preheater through a pipeline, and the water outlet of the condensing cavity of the preheater is connected to a condensed water storage tank through a pipeline.

In order to improve the water quality of the condensed water, preferably, an oil remover is connected between the preheater and the condensed water storage tank for removing oil in the condensed water.

Due to the above-mentioned technical scheme, the utility model has the following beneficial effects:

Using this system to treat oil drilling wastewater, solar energy is used to replace the heat source of the conventional evaporation method to treat sewage, and the evaporation of sewage can be realized under the condition of consuming a small amount of electric energy, and the air pollution and groundwater pollution caused by the direct evaporation of sewage in the drying pool are avoided. , the collected condensed water meets the standards specified in the "Integrated Wastewater Discharge Standard GB8978-1996" for discharge or reuse.

Description of drawings

Fig. 1 is the structural representation of the utility model.

reference sign

In the accompanying drawings, 1. Drilling wastewater storage tank, 2. Filter, 3. Feed pump, 4. Preheater, 5. Evaporation separator, 6. Groove solar collector, 7. Heat transfer oil circulation pump, 8. Concentrate circulation pump, 9. Oil remover, 10. Condensate storage tank.

detailed description

Referring to Fig. 1, it is a kind of preferred embodiment of petroleum drilling waste water treatment system, comprises drilling waste water storage tank 1, filter 2, feed pump 3, evaporator, concentrated liquid circulation pump 8, described drilling waste water storage tank 1 is used to settle the drilling wastewater, so that the large particle impurities in the drilling wastewater are deposited at the bottom of the tank, and the water inlet end of the filter 2 is connected with the inner cavity of the drilling wastewater storage tank 1 through a pipeline, and is used to filter out the drilling wastewater Small particle impurities in the feed pump 3, the water inlet end of the feed pump 3 is connected to the outlet end of the filter 2 through a pipeline, and is used to extract the drilling wastewater in the drilling wastewater storage tank 1, and the evaporation device is connected to the feed pump through a pipeline. 3 connections, used for evaporating and concentrating the drilling waste water, the water inlet end of the concentrated liquid circulating pump 8 is connected to the evaporation device through a pipeline, and is used to extract the concentrated liquid in the evaporating device, and the water outlet end of the concentrated liquid circulating pump 8 is passed through the pipeline It is connected with the drilling waste water storage tank 1, and is used for injecting the concentrated liquid into the drilling waste water storage tank 1 for storage.

The evaporation device includes an evaporation separator 5 , a heat transfer oil circulation pump 7 , and a solar heat collector. In this embodiment, the solar heat collector is a trough-type solar heat collector 6 . The evaporative separator 5 includes a drilling waste water holding chamber and a heat transfer oil circulation chamber. The heat transfer oil circulation chamber covers the drilling waste water holding chamber and is used to heat the drilling waste water in the drilling waste water holding chamber. The drilling waste water holding chambers are respectively The feed pump 3 and the concentrated liquid circulation pump 8 are connected through pipelines, and the heat transfer oil circulation chamber is connected with the heat conduction oil circulation pump 7 and the solar heat collector through pipelines respectively, and the heat conduction oil circulation pump 7 and the solar heat collector pass through Pipeline connection, the solar heat collector is used to heat the passing heat transfer oil, and the heat transfer oil circulation pump 7 is used to circulate the heat transfer oil in the evaporation device.

It also includes a preheater 4. The preheater 4 includes a drilling waste water passing chamber and a condensation chamber. The condensation chamber covers the drilling waste water passing chamber and is used for preheating the drilling waste water in the drilling waste water passing chamber. The drilling waste water passes through the chamber. The cavities are respectively connected to the feed pump 3 and the drilling wastewater storage cavity through pipelines. The drilling wastewater storage cavity of the evaporation separator 5 is provided with a steam outlet, and the steam outlet is connected to the steam inlet of the preheater 4 condensation cavity through a pipeline. , the water outlet of the condensing chamber of the preheater 4 is connected to the condensed water storage tank 10 through a pipeline. Further, an oil remover 9 is connected between the preheater 4 and the condensed water storage tank 10 for removing oil in the condensed water.

Referring to Fig. 1, it is a method for treating oil drilling wastewater by the oil drilling wastewater treatment system. After the drilling wastewater enters the drilling wastewater storage tank 1 and settles, the large particles of silt stay in the pipe and then enter the filter 2, so that most of the solid particles are filtered To avoid deposition in the heat exchanger and evaporator, resulting in increased heat transfer resistance, or even blockage. The filtered drilling wastewater enters the preheater 4, and utilizes the vaporization latent heat and sensible heat of the steam generated by the evaporative separator 5. This step acts as a heat recovery device, recovering the heat energy of the steam and reducing the subsequent transmission of sewage and heat transfer oil. Thermal temperature difference reduces irreversible loss. The preheated drilling wastewater flows into the evaporative separator 5, and the evaporation of the drilling wastewater realizes the separation from small particle size solids, heavy hydrocarbons and colloids, and the latter is introduced into the drilling wastewater storage tank 1 as an evaporated concentrated solution for recirculation or discharge and collected. deal with. The heat of the evaporative separator 5 comes from the high-temperature heat transfer oil of the trough solar collector 6. The trough solar collector 6 uses the concentrator to track the movement of the sun, and the trough parabolic reflector reflects the incident direct sun to the installation On the heat-absorbing pipe on the focal line of the parabola, the heat-conducting oil in the heat-absorbing pipe can reach a higher temperature after absorbing heat, and then enter the steam generator to release heat to evaporate the preheated drilling wastewater, and the steam enters the preheater 4 After condensing, it enters the degreaser 9 to remove the light component oils that may be contained in the condensed water, and the condensed water meets the standards stipulated in the "Comprehensive Wastewater Discharge Standard GB8978-1996" for discharge or reuse.

Finally, it is noted that the above preferred embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in the form Various changes can be made to it in the aspects and details without departing from the scope defined by the claims of the present invention.

Claims (5)

1. A petroleum drilling waste water treatment system is characterized in that: comprise drilling waste water storage tank, filter, feed pump, evaporating device, concentrated liquid circulation pump, described drilling waste water storage tank is used for drilling waste water is deposited, make The large particles of impurities in the drilling wastewater are deposited at the bottom of the tank, and the water inlet end of the filter communicates with the inner cavity of the drilling wastewater storage tank through a pipeline to filter out the small particles of impurities in the drilling wastewater. The water inlet end is connected to the water outlet end of the filter through a pipeline, and is used to extract the drilling wastewater in the drilling wastewater storage tank. The evaporation device is connected to the feed pump through a pipeline, and is used to evaporate and concentrate the drilling wastewater. The inlet end of the circulating pump is connected to the evaporation device through a pipeline, which is used to extract the concentrated liquid in the evaporation device, and the outlet end of the concentrated liquid circulating pump is connected to the drilling wastewater storage tank through a pipeline, which is used to inject the concentrated liquid into the drilling wastewater storage tank storage. 2. The petroleum drilling wastewater treatment system according to claim 1, characterized in that: the evaporation device includes an evaporation separator, a heat conduction oil circulation pump, and a solar heat collector, and the evaporation separator includes a drilling wastewater holding chamber, a heat conduction The oil circulation cavity, the heat transfer oil circulation cavity covers the drilling wastewater storage cavity, and is used to heat the drilling wastewater in the drilling wastewater storage cavity, and the drilling wastewater storage cavity is connected to the feed pump and the concentrated liquid circulation pump respectively through pipelines, The heat-conducting oil circulation chamber is connected to the heat-conducting oil circulation pump and the solar heat collector through pipelines respectively, and the heat-conducting oil circulation pump and the solar heat collector are connected through pipelines, and the solar heat collector is used to heat the passing heat-conducting oil, The heat transfer oil circulating pump is used to circulate the heat transfer oil in the evaporation device. 3. The petroleum drilling wastewater treatment system according to claim 2, characterized in that: the solar collector is a trough solar collector. 4. The petroleum drilling wastewater treatment system according to claim 2, characterized in that: it also includes a preheater, the preheater includes a drilling wastewater passage chamber and a condensation chamber, and the condensation chamber covers the drilling waste water passage chamber for The drilling waste water is preheated through the drilling waste water in the cavity, and the drilling waste water is connected to the feed pump and the drilling waste water holding chamber through pipelines respectively, and the drilling waste water holding chamber of the evaporation separator is provided with a steam outlet, and the steam The outlet is connected to the steam inlet of the condensing cavity of the preheater through a pipeline, and the water outlet of the condensing cavity of the preheater is connected to a condensed water storage tank through a pipeline. 5. The petroleum drilling wastewater treatment system according to claim 4, characterized in that: an oil remover is connected between the preheater and the condensed water storage tank for removing oil in the condensed water.