CN201053911Y - Sewage tank sealed gas supply and pressure regulation metering device - Google Patents

Abstract

A closed gas supply and pressure regulating metering device for sewage tanks used in the sewage treatment and sewage reinjection processes of oilfield joint stations, transfer stations, and sewage treatment stations. Composed of operating pressure regulating valve, pressure regulating parallel flow, gas flowmeter, flowmeter bypass flow and device outlet, it is characterized in that gas filtration, pressure regulation and parallel flow are set before and after gas collecting manifolds; gas metering and bypass flow are set before and after Gas collection manifold; the pressure of the sewage tank is controlled by the pilot-operated pressure regulating valve; the gas flow meter is used to measure the gas supply volume of the sewage tank; the problem of sealing and oxygen isolation of the sewage tank is solved, and the sewage treatment tank is prevented from being exposed to oxygen and corroded.

Description

Sewage tank sealed gas supply and pressure regulation metering device

1. Technical field

The utility model relates to a metering device for air-tightening and pressure-regulating of sewage tanks used in oilfield sewage treatment technology.

2. Background technology

In the oil field sewage treatment system, dissolved oxygen is one of the most important factors causing corrosion. With the increase of oxygen content in sewage, the corrosion rate increases even more alarmingly, resulting in serious corrosion of sewage pipelines and sewage tanks. At present, the sewage treatment system of some oil fields is an open process, and the sewage often causes oxygen exposure during the treatment process, which accelerates the corrosion of tank walls and pipelines. Natural gas airtight oxygen barrier technology effectively solves this problem. The utility model is the key equipment for the realization of this technology. After the medium and low pressure natural gas is adjusted and metered by this device, the gas is supplied into the sewage tank, so as to ensure that the sewage tank always maintains a slight positive pressure during the operation process, and realizes sewage treatment and purification of water quality. The long-term stability of oxygen content reaches the standard, effectively reducing the corrosion rate of sewage pipelines and sewage tank walls.

3. Contents of the invention

The purpose of the utility model is to provide a closed sewage tank air supply and pressure regulating metering device, which reduces the corrosion rate of the tank wall and pipeline in the open process of sewage treatment, and eliminates the hidden danger of the sewage tank being flattened.

The technical scheme of the utility model is realized by the following methods:

The utility model is composed of a device inlet, a gas collecting manifold, a gas filter, a pilot-operated pressure regulating valve, a control valve, a gas flow meter, a flow meter bypass and a device outlet, and is characterized in that the control valve, the gas filter, The pilot-operated pressure regulating valve and control valve are installed on the gas pipeline in sequence to form a filter and pressure regulating part, and are connected in parallel to two gas collecting manifolds; the control valve, swirl flowmeter, pressure gauge, pressure transmitter The meter, temperature transmitter and control valve are installed on the gas pipeline in sequence to form the metering and monitoring part; the metering and monitoring part is connected in parallel on two gas collecting manifolds or connected in parallel with a bypass pipe with a control valve on two On the gas-gathering manifolds, one of the gas-gathering manifolds is used as a common gas-gathering manifold for two parts, and the three gas-gathering manifolds are parallel to each other, and the front and rear gas-gathering manifolds are respectively equipped with device outlets and inlets.

The filter, pressure regulating part and metering monitoring part of the utility model can also be connected in parallel on two gas collecting manifolds. A blind flange is arranged in the middle of the gas collecting manifold at the back, and a device outlet is arranged on the left side of the blind plate, and on the right side of the blind plate. importation of installations;

The pilot-operated pressure regulating valve, the precession vortex flowmeter, the pressure transmitter and the temperature transmitter provided in the utility model are provided with a remote transmission interface and connected with a computer.

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

1. The utility model has a wide range of applications and can be applied to natural gas sealing of sewage tanks in sewage treatment systems;

2. Use high-precision pressure regulating valves and gas flowmeters for pressure regulation and measurement, with high precision and good reliability;

3. High degree of automation, measurement results can be displayed locally or transmitted remotely without manual operation;

4. The utility model has the advantages of simple structure, convenient installation, low cost and small maintenance workload.

4. Description of drawings

Fig. 1, 2-schematic flow sheet of the utility model. Explanation of serial numbers in the figure:

1. Device inlet 2. Gas collecting manifold

3. Gas filter 8. Temperature transmitter

4. Pilot-operated pressure regulator 9. Bypass pipeline

Valve 10. Device outlet

5. Screw-in vortex flowmeter 11. Blind flange

6. Pressure gauge

7. Pressure transmitter

5. Embodiment

In order to further disclose the technical solution of the utility model, the following describes in detail through the embodiments in conjunction with the accompanying drawings.

As shown in Figure 1, the utility model consists of device inlet 1, gas collecting manifold 2, gas filter 3, pilot operated pressure regulating valve 4, control valve, precession vortex flowmeter 5, flowmeter bypass and device Outlet composition, which is characterized in that the control valve, gas filter 3, pilot-operated pressure regulating valve 4 and control valve are installed on the gas pipeline in sequence to form a filter and pressure regulating part, and are connected in parallel to two gas collecting manifolds 2 ;The control valve, the precession vortex flowmeter 5, the pressure gauge 6, the pressure transmitter 7, the temperature transmitter 8 and the control valve are installed on the gas pipeline in sequence to form a metering and monitoring part; the metering and monitoring parts are connected in parallel in two 2 on the gas collecting manifold or connected in parallel with a bypass pipe 9 with a control valve on two gas collecting manifolds, one of which is used as a public gas collecting Parallel to each other, the front and rear gas collecting manifolds are respectively provided with an outlet 10 and an inlet 1 of the device.

The working process of the present utility model is as follows:

The air inlet 1 of the device is connected to the natural gas pipe network, and the outlet of the device is connected to the air supply port of the sewage tank. When the water level in the sewage tank drops, the device starts to supply air. The inside of the tank is always in a slightly positive pressure state, so that the micro-pressure regulating valve set on the top of the sewage tank works above a slight positive pressure. If it works under a negative pressure working state, one is that the air enters into the detonation oxygen, and the other is that the sewage is easy to discharge. Can suffocate. The natural gas enters from the device inlet 1, controlled by the control valve, filtered by the filter 3, adjusted by the pilot-operated pressure regulating valve 4, and enters the precession vortex flowmeter 5 for measurement. The measured natural gas pressure is displayed by the pressure gauge 6 and transmitted remotely. Computer, pressure transmitter 7 remote computer. The gas temperature is transmitted to the computer remotely by the temperature transmitter 8, and calculated by the computer program, a pressure regulation range parameter is given, and the command command operation type pressure regulating valve is adjusted according to this parameter to ensure the safety of the closed sewage tank. The device can be used according to The number of air tanks needed can be used in a single set or in double sets. 11 is when using two gas-gathering manifolds, the blind flange established in the middle of the rear gas-gathering manifolds.

Claims (3)

1. A closed gas supply and pressure regulating metering device for sewage tanks used in the sewage treatment and sewage reinjection processes of oilfield joint stations, transfer stations, and sewage treatment stations. It consists of a device inlet, a gas collection manifold, a gas filter, Pilot-operated pressure regulating valve, control valve, gas flowmeter, flowmeter bypass and device outlet, characterized in that the control valve, gas filter, pilot-operated pressure regulating valve and control valve are installed in the gas pipeline in sequence On the top, it forms the filter and pressure regulating part, and is connected in parallel on the two gas collecting manifolds; the control valve, the precession vortex flowmeter, the pressure gauge, the pressure transmitter, the temperature transmitter and the control valve are installed on the gas pipeline in sequence , to form the metering and monitoring part; the metering and monitoring part is connected in parallel to two gas collecting manifolds or connected in parallel with a bypass pipe with a control valve on two gas collecting manifolds, one of which is used as two parts The common gas-gathering manifolds, the three gas-gathering manifolds are parallel to each other, and the front and rear gas-gathering manifolds are respectively equipped with device outlets and inlets. 2. The airtight air-supplementing and pressure-regulating metering device for sewage tank according to claim 1, characterized in that the filter, pressure regulating part and metering monitoring part of the utility model can also be connected in parallel on two gas-collecting manifolds, and the gas-collecting part at the back There is a blind flange in the middle of the manifold, the outlet of the device is set on the left side of the blind plate, and the inlet of the device is set on the right side of the blind plate. 3. The airtight air-supplementing and pressure-regulating metering device for sewage tanks according to claim 1, characterized in that the pilot-operated pressure-regulating valve, the precession vortex flowmeter, the pressure transmitter and the temperature transmitter are provided in the utility model Equipped with remote interface and computer networking.

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