RU2799897C1 - Device for thermal neutralization of industrial waste water - Google Patents

Abstract

FIELD: waste disposal.

SUBSTANCE: invention relates to devices for thermal neutralization of industrial effluents generated in gas, gas condensate and oil fields and can be used in the chemical, petrochemical and other sectors of the economy. The device for thermal neutralization of industrial effluents contains a system of gas and liquid supply pipelines with shut-off equipment, an industrial effluent neutralization device equipped with two horizontal burners and connected to a liquid supply pipeline through a liquid inlet pipe, and to a gas supply pipeline through a gas inlet pipe. One of the horizontal burners is an ignition burner with expanding nozzles, nozzles, and a Coanda-shaped baffle attached to the bottom of the burner and connected to the gas supply pipeline. The device for thermal neutralization of industrial effluents is equipped with an additional device for the neutralization of industrial effluents, equipped with two burners. The system of pipelines for supplying gas and liquid is additionally provided with a pipeline for the reserve supply of industrial effluents, equipped with a valve that ensures the exit of the liquid flow from the pipeline for the reserve supply of industrial effluents, an additional pipeline equipped with a valve and connecting the pipeline for the reserve supply of industrial effluents with an additional device for neutralizing industrial effluents with the possibility of supplying industrial effluent flow to expanding burner nozzles. The pipeline of the gas supply line is additionally connected to the burners of the additional device for the neutralization of industrial effluents with the possibility of supplying a gas flow to the expanding nozzles of the burners, ensuring the passage of the gas flow through the valve and the ball valve, and with the gas supply to the expanding nozzles of the burners simultaneously to the device for neutralizing industrial effluents and to additional device for the neutralization of industrial effluents.

EFFECT: improving the quality of thermal neutralization of industrial effluents due to the complete utilization of industrial effluents from the field, ensuring a safe operation of the complex gas treatment plant.

1 cl, 3 dwg, 1 ex

Description

The invention relates to devices for thermal neutralization of industrial effluents generated in gas, gas condensate and oil fields and can be used in the chemical, petrochemical and other sectors of the economy.

A device for thermal neutralization of liquid waste is known, which includes horizontally placed flare burners, a gas collector, a gas inlet pipe with a flame arrester located at the end, a liquid waste collector, a liquid waste inlet pipe, while the gas and liquid waste collectors are connected to the flare burners, equipped with a splitter in the form of a Coanda body placed on the collector, a pilot burner is installed parallel to the horizontal flare burners and in the housing x, made in the form of pipes, there is an ignition burner and a flame control sensor (RF patent No. 2460017, F23G 7/04, F23N 5/00, publ. 27.08.2012).

The disadvantage of this device is the use of a control system and a flame control sensor, namely, the impossibility of working on clusters of absorbing wells without power supply and at low temperatures in the Far North, as well as additional maintenance costs.

Known installation for the disposal of industrial effluents, which includes a housing located inside the produced water supply pipe, the position of which is stabilized by means of a support plate inside the housing, and from the ends of the housing using flange connections. From the opposite end of the housing, using a flange connection, the body of one nozzle is attached to another nozzle, while inside the other nozzle there is a formation water supply pipe with a nozzle attached to it by means of a threaded connection. To fix the nozzle inside the body, a retaining ring is installed, which is attached to the nozzle body by means of a bolted connection. A gas pipe is connected to the lower part of the housing (RF patent No. 159090, F23G 7/04, published on January 27, 2016).

The disadvantage of this device is the absence of the Coanda body and, as a result, there is no turbulence of the gas flow, which is important for more stable combustion of the external "annular" flame, thereby there is a possibility of flame failure, thereby leaking the utilized product into the atmosphere.

A horizontal flare device for neutralizing industrial effluents is known, containing a system of pipelines for supplying gas and liquid with shut-off equipment, a device for neutralizing industrial effluents, equipped with two horizontal burners and connected to the liquid supply pipeline through the liquid inlet pipe, and to the gas supply pipeline through the gas inlet pipe, one of the horizontal burners is an ignition burner with expanding nozzles, nozzles and a splitter in the form of a Coanda body attached to the bottom of the burner , and connected to the gas supply pipeline (Mamistov V.V., Kravchenko V.A. et al. Developments of Yuzhniigiprogaz for environmental protection at the facilities of gas producing enterprises. - M .: VNIIEgazprom, 1986, - Obz. inform. Ser. Natural gas and environmental protection. Issue 4, p. 33, prototype).

The disadvantage of the device is the incomplete neutralization of industrial effluents, due to the low productivity of the burner 2.5-6 m ³ /h, thereby not providing the daily volume of utilization of industrial effluents at the complex gas treatment plant.

The objective of the claimed technical solution is to create conditions for ensuring the complete utilization of industrial effluents, including industrial effluents from the field during repair work on absorbing wells.

The technical result consists in improving the quality of thermal neutralization of industrial effluents due to the complete utilization of industrial effluents from the field, ensuring a safe operation of the complex gas treatment plant.

The technical result is achieved by the fact that the device for thermal neutralization of industrial effluents contains a system of gas and liquid supply pipelines with shut-off equipment, an industrial effluent neutralization device equipped with two horizontal burners and connected to the liquid supply pipeline through the liquid inlet pipe, and to the gas supply pipeline through the gas inlet pipe, one of the horizontal burners is an ignition burner with expanding nozzles, nozzles and a splitter in the form of a Coanda body, attached from below to burner, and connected to the gas supply pipeline, it is equipped with an additional device for neutralizing industrial effluents, equipped with two burners, the system of gas and liquid supply pipelines is additionally equipped with a reserve supply pipeline for industrial effluents, equipped with a valve that ensures the exit of the liquid flow from the pipeline for the reserve supply of industrial effluents, an additional pipeline equipped with a valve and connecting the pipeline for the reserve supply of industrial effluents with an additional device for neutralizing industrial effluents with the possibility of supplying the flow of industrial effluents to the expanding nozzles of the burners, the pipeline of the gas supply line is additionally connected to burners of an additional device for the neutralization of industrial effluents with the possibility of supplying a gas flow to the expanding nozzles of the burners, ensuring the passage of the gas flow, exits through a valve and a ball valve with gas supply to the expanding nozzles of the burners simultaneously to the neutralization of industrial effluents and to the additional neutralization of industrial effluents.

The invention is illustrated by drawings, where in Fig. 1 shows a flow diagram of a device for thermal neutralization of industrial effluents, Fig. 2 is a photo of a piping system with shut-off equipment, in FIG. 3 is a photo of a barn with an industrial effluent neutralization device and an additional industrial effluent neutralization device.

The device for thermal neutralization of industrial effluents includes the following structural elements:

1 - pipeline for the reserve supply of industrial effluents from the complex gas treatment plant;

2 - valve;

3 - valve;

4 - gas supply pipeline from the complex gas treatment unit;

5 - valve;

6 - ball valve;

7 - pipeline for supplying industrial effluents from the complex gas treatment plant;

8 - valve;

9 - valve;

10 - ball valve;

11 - industrial waste neutralization device;

12 - additional device for the neutralization of industrial effluents;

13 - barn absorbing wells;

14 - additional pipeline;

15 - expanding burner nozzles.

Industrial effluents are effluents from process installations, for example, from a boiler house, from flushing and after emptying of process equipment, which, after treatment, are pumped through a pressure collector into absorption wells. This method of utilization of industrial effluents for a complex gas treatment plant is currently the main one.

In the process of long-term operation, the injectivity of absorbing wells often deteriorates, which subsequently leads to work on the overhaul of the well and the transfer of industrial wastewater to another well (if any) or disposal in a barn by burning.

The device for thermal neutralization of industrial effluents contains a system of pipelines 1, 7, 4 and 14 with shut-off equipment in the form of valves 2, 3, 5, 8 and 9 and ball valves 6 and 10, a device for neutralizing industrial effluents 11, an additional device for neutralizing industrial effluents 12 and a barn of absorption wells 13.

The piping system includes:

- a pipeline for the reserve supply of industrial effluents 1 from the complex gas treatment plant (hereinafter referred to as the "reserve line for the supply of industrial effluents"), equipped with a liquid inlet pipe and a valve 2;

- gas supply pipeline 4 from the complex gas treatment plant (hereinafter referred to as the "gas supply line"), equipped with a gas inlet pipe, ball valves 6 and 10 and a valve 5;

- pipeline for supplying industrial effluents 7 (hereinafter referred to as "industrial effluent supply line"), equipped with a liquid inlet pipe and valves 8 and 9;

- and an additional pipeline 14, equipped with a fluid inlet pipe and a valve 3.

The reserve line for supplying industrial effluents 1 is connected to an additional neutralization device for industrial effluents 12 through an additional pipeline 14, ensuring the flow of industrial effluents from the complex gas treatment plant (hereinafter referred to as "GTP") to the additional neutralization device for industrial effluents 12.

The reserve supply line of industrial effluents 1 is equipped with shut-off equipment that ensures the exit of the liquid flow from the pipeline of the reserve supply of industrial effluents 1 through the valves and the passage to the liquid inlet pipe, then to the nozzles and to the expanding nozzles 15 of the burners.

The industrial effluent neutralization device 11 is equipped with two horizontal burners with expanding nozzles 15, nozzles and a splitter in the form of a Coanda body, attached to the bottom of the burner, and connected to the reserve industrial waste supply line 1, to the industrial waste supply line 7 and the gas supply line 4, while the gas supply line 4 is connected to the burners of the industrial waste neutralization device 11.

The additional industrial waste water neutralization device 12 is equipped with two horizontal burners with expanding nozzles 15, nozzles and a splitter in the form of a Coanda body, attached to the bottom of the burner, and connected to the reserve industrial waste supply line 1, the industrial waste supply line 7 and the gas supply line 4, while the gas supply line 4 is connected to the burners of the additional industrial waste neutralization device 12.

Burners with expanding nozzles 15 are connected by nozzles to pipelines for supplying gas and liquid, equipped with shut-off equipment, while one of the burners is a horizontal pilot burner, which provides smokeless combustion and eliminates the attenuation of the gas-liquid mixture leaving the main flame from pneumatic nozzles.

The pilot burner uses gas that goes along a curved surface and goes around the Coanda body, creating a vacuum from the outside and drawing additional air into the flame for smokeless combustion and crossing with the main flame coming out of the pneumatic nozzles. The ignition burner is ignited by an external open fire - a lit tow laid on Coanda's body.

Gate valves are located:

- valve 2 is located at the outlet of the reserve supply line for industrial waste 1 from the GTP;

- the valve 3 is located on the additional pipeline 14, between the valve 2 and the additional industrial waste neutralization device 12, ensuring the flow of industrial effluents from the GTP to the additional industrial waste neutralization device 12;

- valve 5 is located at the outlet of the gas supply line 4, ensuring the flow of gas to the industrial waste neutralization device 11 and to the additional industrial waste neutralization device 12;

- valve 8 is located at the outlet from the industrial waste supply line 7, ensuring the flow of industrial effluents from the reserve industrial waste supply line 1 through the valve 2 or from the industrial waste supply line 7 to the industrial waste neutralization device 11 through the valve 9 and to the additional industrial waste neutralization device 12 through the valve 3;

- the valve 9 is located on the industrial effluent supply line 7 between the valve 8 and the industrial effluent neutralization device 11, ensuring the flow of industrial effluents from the GTP to the industrial effluent neutralization device 11.

Ball valves are located:

- ball valve 6 is located on the gas supply line 4 between the valve 5 and the additional neutralization device for industrial waste 12, ensuring the flow of gas to the additional neutralization device for industrial waste 12;

- ball valve 10 is located on the gas supply line 4 between the valve 5 and the industrial waste neutralization device 11, ensuring the flow of gas to the industrial waste neutralization device 11.

On the reserve line for supplying industrial waste 1, shut-off equipment is located that ensures the exit of the liquid flow in the form of industrial waste from the GTP from the reserve line for supplying industrial waste 1 through valves 2 and 3, the passage through the additional pipeline 14 and the liquid inlet pipe to the expanding nozzles 15 of the burners of the device for neutralizing industrial waste 11.

The gas supply line 4 is connected to the burners of the additional device for the neutralization of industrial effluents, ensuring the passage of the gas flow, and exits through the valve 5 and the ball valve 6 or 10 to the gas inlet pipe of the additional device for the neutralization of industrial effluents 12 and further to the expanding nozzles 15 of the burners and providing thermal neutralization of industrial effluents by splitting the liquid in the form of industrial effluents from the GTP into the smallest particles in the expanding nozzle 15 of the burners.

Gas with liquid droplets, leaving the expansion nozzle 15 burners, is mixed with air, forming a combustible mixture, which is ignited by the flame of the pilot burner. The pilot burner is a gas that goes along a curved surface and goes around the Coanda body, creating a vacuum from the outside and involving additional air into the burner flame for smokeless combustion and crossing with the flame coming out of the pneumatic nozzles. The pilot burner is ignited by an external open fire - a lit tow laid on Coanda's body, while the water of the combustible mixture evaporates in the flame of the main burner torch, and the remaining substances of the combustible mixture are split into neutral components under the action of high temperature.

Device for thermal neutralization of industrial effluents works as follows.

Shutoff valves in the form of valves are successively switched on the reserve line for supplying industrial wastewater 1, namely, by opening:

valve 2, located at the outlet of the reserve line for supplying industrial wastewater 1,

valve 3, located on the additional pipeline 14.

Through valves 2 and 3 from the reserve line for supplying industrial effluents 1, liquid in the form of industrial effluents is supplied through an additional pipeline 14 from the reserve line for supplying industrial effluents 1 through the valves to the nozzles and further to the expanding nozzles 15 of the burners of the additional device for neutralizing industrial effluents 12.

Shutoff valves in the form of valves on the pipeline of the gas supply line 4 from the GTP are sequentially switched, namely, by opening the valve 5 located at the outlet of the pipeline of the gas supply line 4 from the GTP, and the ball valve 6 located on the pipeline of the gas supply line 4, through which dry gas from the GTP is supplied to the additional device for neutralizing industrial effluents 12, is fed into the expanding nozzles 15 of the burners of the additional device for neutralizing industrial effluents 12 .

Leaving the expanding nozzle 15 of the burners at high speed, the combustible dry gas with liquid droplets is mixed with air, forming a combustible mixture of gas-liquid flow, which is ignited by means of an ignition burner, previously ignited by an open fire (lit tow). At the same time, water from the combustible mixture of the gas-liquid stream evaporates in the flame of the burner torch, the combustible mixture burns out, other substances of the gas-liquid stream are split into neutral components under the influence of high temperature, while ensuring complete combustion of all industrial effluents and retaining the ability to dispose of both along one line: the main 7 or reserve 1, and along both lines using an additional pipeline 14 for the reserve industrial waste supply pipeline 1, but simultaneously to both neutralization devices industrial effluents 11 and 12 to ensure the incineration of all industrial effluents from the GTP, improving the quality of liquid industrial waste neutralization.

The claimed technical solution improves the quality of thermal neutralization of industrial effluents, making it possible to completely utilize the industrial effluents of the field through the complete combustion of all industrial effluents, ensuring the safe operation of the complex gas treatment plant.

An example implementation of the proposed device

In March 2022, the proposed device was tested at the Gazprom dobycha Urengoy LLC at gas condensate field No. 5 on a pad of absorbing wells during the workover of well No. 24-P.

For this, pipelines and valves were installed:

- supply of industrial effluents and gas supply to the additional neutralization device 12;

After carrying out the installation work on connecting the reserve line for the supply of industrial effluents 1 from the GTP to an additional device for neutralizing industrial effluents 12:

- on the reserve line for supplying industrial effluents 1, they opened:

valve 2 at the outlet from the reserve line for supplying industrial effluents 1, valve 3 on the reserve line for supplying industrial effluents 1 to the additional device for neutralizing industrial effluents 12. Thus, liquid was supplied through the additional pipeline 14 from the reserve line for supplying industrial effluents 1 to the nozzles and further to the expanding nozzles 15 of the burners of the additional device for neutralizing industrial effluents 12;

- on gas supply line 4 with GTP, opened:

a valve 5 at the outlet from the gas supply line 4 from the GTP, a ball valve 6 on the gas supply line 4 to the additional industrial effluent neutralization device 12. Thus, dry gas was supplied to the expanding nozzles of the burners of the additional industrial effluent neutralization device 12.

At the outlet of the nozzle at high speed, combustible gas (dry methane) with liquid droplets mixed with air, thus forming a combustible mixture in the form of a gas-liquid mixture. Next, the gas-liquid flow was ignited. Water evaporates in the flame of the torch, the combustible mixture burns out, other substances are split into components under the action of high temperature.

In this case, industrial effluents from the GTP were neutralized, namely, treated effluents from process units, the boiler house, from washing and after emptying the process equipment.

At the outlet of the neutralization, a vapor mixture was obtained.

The claimed device improved the quality of thermal neutralization of industrial effluents, made it possible to completely utilize industrial effluents from the field by completely burning all industrial effluents, and showed its effectiveness in terms of creating conditions for the complete utilization of industrial effluents from the field, for example, during repair work on absorbing wells.

The installation of the proposed device was carried out in such a way that it was possible to dispose of only one line (main or reserve), but to both devices for neutralizing industrial effluents to ensure the combustion of all industrial effluents from the GTP.

Claims (1)

The device for thermal neutralization of industrial effluents contains a system of gas and liquid supply pipelines with shut-off equipment, an industrial effluent neutralization device equipped with two horizontal burners and connected to the liquid supply pipeline through a liquid inlet pipe, and to the gas supply pipeline through a gas inlet pipe, one of the horizontal burners is an ignition burner with expanding nozzles, nozzles and a splitter in the form of a Coanda body, attached to the bottom of the burner, and connected to the supply pipeline gas, characterized in that it is equipped with an additional device for the neutralization of industrial effluents, equipped with two burners, the system of gas and liquid supply pipelines is additionally equipped with a pipeline for the reserve supply of industrial effluents, equipped with a valve that ensures the exit of the liquid flow from the pipeline for the reserve supply of industrial effluents, an additional pipeline equipped with a valve and connecting the pipeline for the reserve supply of industrial effluents with an additional device for neutralizing industrial effluents with the possibility of supplying a stream of industrial effluents to the expanding nozzles of the burners, the pipeline of the gas supply line is additionally connected to the burners of the additional device for the neutralization of industrial effluents with the possibility of supplying a gas flow to the expanding nozzles of the burners, ensuring the passage of the gas flow through the valve and ball valve, and with the gas supply to the expanding nozzles of the burners simultaneously to the industrial effluent neutralization device and to the additional industrial effluent neutralization device.