RU2674775C1 - Modular degassing unit - Google Patents

Abstract

FIELD: mining.SUBSTANCE: invention relates to the prone to gas and geodynamic phenomena mineral deposits underground mining, and, in particular, to the coal deposits development. Modular degassing unit (MDU) is designed for methane-air mixture (MAM) pumping out from existing and already closed coal and ore mines, relates to the mining industry, and can be used in the automated ventilation systems and air conditioning in oil mines and other underground structures, including gases and dust explosion hazardous. Modular degassing unit (MDU) equipment is housed in the metal thermo-and noise-insulated modular container, ensuring that environmental conditions do not affect the equipment operating parameters, as well as preventing th operating equipment noise spreading into the surrounding space, shut-off valves with pneumatic actuators, purge pipelines, and flame arresters are installed, to create a vacuum, a dry-type vacuum pump (rotary vacuum pump) is used, which does not require water to operate, an automated degassing unit control system (ACS DU) has been developed and implemented, ensuring the MDU operation both in the automatic (without human participation) and in the manual modes, the operational information transmission about the MDU operating parameters to the mine control room, and operation within the mine AGC unified system.EFFECT: invention technical task is the methane-air mixture (MAM) effective pumping out from existing and closed (mothballed) coal and ore mines, reducing the entering the mine working and coming to the surface from the soil methane volume; the evacuated gas transportation for disposal or further use.1 cl, 7 dwg

Description

The invention relates to underground mining of mineral deposits prone to gas and geodynamic phenomena, and in particular to the development of coal deposits. The modular degassing unit (MDU) is designed to pump methane-air mixture (MVS) from existing and already closed coal mines and mines; it belongs to the mining industry and can be used in automated ventilation and air conditioning systems in oil mines and other underground structures, including explosion hazardous gases and dust.

Known degassing installation, containing interconnected via pipelines in a closed loop water-ring vacuum pump, water separator and water cooler, made in the form of two heat transfer units, the second heat exchange unit connected between the first heat transfer unit and the vacuum pump, the first heat transfer unit is made in the form a radiator with fin tubes, blown by a fan, and the second heat exchange unit is made in the form of a tank with a lid, on which a vacuum pump is installed, to which suction upstream and downstream manifolds, the latter connected to a water separator, the vacuum pump housing has respectively the first and second seals for the impeller shaft, each of which is equipped with a nozzle for draining water, two containers are introduced, placed one above the other and installed below the level of the vacuum pump , the upper tank is connected using the first and second flexible hoses with nozzles for draining water, respectively, from the first and second seals, the lower tank is equipped with a level gauge and has a first, second, third and a fourth branch pipe with valves connected respectively to the upper tank, a vacuum pump, a discharge manifold and a suction manifold, and a fifth branch pipe with a valve and an open free end. [RF patent for utility model No. 90129, M.Kl. E21F 7/00 of September 7, 2009]

A disadvantage of the known degassing installation is the low level of operational parameters due to design features that require the constant presence of maintenance personnel to control the degassing installation, the absence of a mandatory purge of the vacuum pump with fresh air before starting and stopping the degassing installation, the absence of quick shut-off valves, the absence of flame arresters, and the inability to operate at low temperatures.

The problems described above are partially solved in two models of a degassing installation.

Known mobile vacuum pump degassing installation, which includes vacuum pumps connected to a degassing well, metering devices for concentration, pressure, temperature and flow rate of the gas mixture, moisture separators, control devices and emergency protection with a system for dumping the gas mixture into the atmosphere and flame arresters installed on gas pipelines for supplying a gas mixture, emergency protection device, microcontrollers. [RF patent for utility model No. 112939, M.Kl. E21F 7/00 of 01/27/2012].

The closest in technical essence and the achieved result is a mobile vacuum-pump degassing installation, which includes vacuum pumps connected to a degassing well, metering devices for concentration, pressure, temperature and gas mixture flow rate, moisture separators, control devices and protection against emergency conditions with a system for discharging a gas mixture into the atmosphere and fire arresters installed on gas pipelines for supplying a gas mixture, automatic valves installed on gas pipelines for discharging gas howling mixture into the atmosphere, emergency protection device, microcontrollers. [RF patent for utility model No. 112938, M.Kl. E21F 7/00 of 01/27/2012].

The disadvantages of these models are the insufficient efficiency of the devices for suppressing noise propagating from vacuum pumps through gas pipelines, due to a significant distance from noise sources (vacuum pumps), the absence of measures to reduce noise propagating from operating equipment (vacuum pumps, electric motors, belt drive and etc.) into the environment, the presence of one purge pipe does not allow to start the backup vacuum pump when one vacuum pump is operating on degas The mains network and equipment layout do not allow inspection and cleaning of fire suppressors during operation of at least one vacuum pump without a complete stop of the degassing unit and the ineffective pumping of methane-air mixture (MVS) from existing and closed (mothballed) coal mines and mines, not convenient delivery and installation of the installation, as well as low safety of staff during its operation.

An object of the invention is the effective pumping of methane-air mixture (MVS) from existing and closed (mothballed) coal mines and mines, reducing the volume of methane entering the mine and leaving the surface from the soil, transporting the evacuated gas for utilization or further use by applying vacuum dry type pump (rotary vacuum pump), for the operation of which water is not required, reduction to a minimum, or the complete exclusion of the participation of maintenance personnel in managing the operation of a modular degassing installation (MDU) and reducing the likelihood of human error when operating equipment at a hazardous production facility, operation regardless of external climatic influences, transferring operational information about the operating parameters of the MDU to the mine dispatch service for operation within the framework of a unified aerogas control system (AGC) .

This goal is achieved by the fact that the equipment of a modular degassing installation (MDU) is placed in metal thermo-noise-insulated module containers, which ensure that there is no influence of external conditions on the operating parameters of the equipment, as well as preventing the propagation of noise from operating equipment into the surrounding space, one is used to create a vacuum or several dry type vacuum pumps (rotary vacuum pumps), which do not require water to operate. At the outlet of each rotary vacuum pump, a silencer and pneumatic shutters are installed, each rotary vacuum pump is connected to the purge pipe, and fire arresters are installed at the inlet and outlet, as a result of which water treatment equipment (circulation pumps, water separators, water chillers, etc. .), an automated control system for a degassing installation (ACS DU) was developed and introduced, which ensures the operation of the MRLs in both automatic (without human intervention) and in manual modes, the transmission of operational information about the operating parameters of the MRLs to the mine control room, as well as work within the framework of a unified AGK mine system. The installation is made in the form of modules for vacuum, cleaning and control. One or more rotary vacuum pumps are installed in the evacuation module, and the cleaning module is connected to the degassing well through the main and vacuum gas pipelines. The installation of the MRL includes the mandatory presence of at least one vacuum module (MB), at least one cleaning module (MO) and one control module (MU). The evacuation module is made in the form of a metal casing, acting as a thermo-noise-insulating module-container, divided into two rooms, a technological and a control system room, isolated from each other by a sealed partition. One or several pumping groups are located in the technological room, including an electric rotary vacuum pump, shut-off valves, fire arresters, a silencer at the outlet of a rotary vacuum pump, a purge pipe with a pneumatic actuator shutter, a discharge gas pipeline, a noise silencer, an exhaust gas pipeline, an air composition control system , heater, lamp, emergency ventilation fan and autonomous automatic fire extinguishing system. In the control system room, control equipment with a programmable controller is located (control cabinets, switching equipment, etc.). The cleaning module is also made in the form of a thermo-noise-insulated module-container similar to a vacuum module, divided into two rooms isolated from each other by a sealed partition, a methane-air mixture cleaning system with automatic liquid draining as the accumulator is filled is placed in the technological room, two of which are vacuum pipelines, one of which designed for clean MVS, and the vacuum gas pipeline is made with the possibility of communication with the atmosphere through a valve with a pneumatically operated outlet pipe, the collector of the MVS cleaning system, a shut-off valve with a pneumatic drive of the cleaning system, a valve with a pneumatic drive of a branch pipe and a branch pipe with a flame arrester, a room air composition control system (for example a methane sensor), heaters, lamps, emergency ventilation fan and an autonomous automatic fire extinguishing system. In the premises of the control system (CCP) there is control equipment for the cleaning module (control cabinets, switching equipment, etc.). The MDU is equipped with a system for analyzing the composition of the MVS in the main gas pipeline, as well as a system for determining the consumption of MVS in the vacuum gas pipeline of the cleaned MVS.

The invention is illustrated by drawings, where in FIG. 1. The layout of the modular degassing installation is given (Option I); in FIG. 2 shows the main equipment of the evacuation module for option I of the layout of the modular degassing installation, where (A) is a front view, (B) is a top view; in FIG. 3 shows the main equipment of the cleaning module, where (A) is a front view, (B) is a top view; in FIG. 4 shows the main equipment of the control module; in FIG. 5 shows the main equipment of the cleaning module for option I of the layout of the modular degassing unit (MDU) when combining the cleaning module and the control module, where (A) is a front view, (B) is a top view; figure 6 shows the layout of the MRL (Option II), with a cleaning system mounted in the vacuum module; in FIG. 7 shows the main equipment of the evacuation module (MB) for option II.

Structurally, a modular degassing installation (MDU) with an automated control system (ACS) consists of several metal module containers with equipment located in them.

The modular degassing unit (MDU) contains:

1 - evacuation module (MB);

2 - cleaning module (MO);

3 - control module (MU);

4 - degassing well;

5 - main gas pipeline;

6 - vacuum gas pipeline;

7 - outlet pipe;

8 - vacuum gas pipeline purified methane-air mixture (MVS);

9 - exhaust gas pipeline;

10 - rotary vacuum pump;

11 - shut-off valve with pneumatic drive of the cleaning system;

12 - a collector of a methane-air mixture purification system (MVS);

13 - methane-air mixture purification system (MVS);

14 - shut-off valve with pneumatic actuator at the inlet of a rotary vacuum pump;

15 - flame arrester at the inlet of a rotary vacuum pump;

16 - silencer at the outlet of a rotary vacuum pump;

17 - flame arrester at the outlet of a rotary vacuum pump;

18 - shut-off valve with pneumatic actuator at the outlet of a rotary vacuum pump;

19 - discharge gas pipeline;

20 - silencer noise module vacuum;

21 - a valve with a pneumatic drive of a branch pipe;

22 - flame arrester of a branch pipe;

23 - purge pipe with a shut-off valve with pneumatic actuator;

24 - metal casing of a thermo-noise-insulated module-container;

25 - sealed partition;

26 - electric rotary vacuum pump;

27 - a system for monitoring the composition of air in the technological room of the metal housing of the module;

28 - heater;

29 - lamp technological premises;

30 - emergency ventilation fan;

31 - autonomous automatic fire extinguishing system;

32 - control equipment with a programmable controller;

33 - control equipment for the cleaning module;

34 - a system for analyzing the composition of a methane-air mixture (MVS);

35 - a system for determining the consumption of methane-air mixture (MVS);

36 - metal housing thermally insulated control module (MU) - 3;

37 - operator workstation;

38 - control panel;

39 - lamp;

40 - convector;

41 - furniture;

42 - air conditioning;

43 - a bathroom;

44 - drive

Modular degassing installation works as follows.

In the suction zone, a rotary vacuum pump - 10 creates a vacuum, as a result of which the methane-air mixture from the degassing well - 4 through the main gas pipeline - 5 and the vacuum gas pipeline - 6, through the shut-off valve with the pneumatic drive of the cleaning system - 11, the collector of the methane-air mixture cleaning system - 12, methane-air mixture purification system - 13, vacuum gas pipeline - 8 purified methane-air mixture, through a shut-off valve with a pneumatic actuator - 14 and a flame arrester - 15 enters the inlet of a rotary vacuum pump - 10. Next, a new air mixture through a noise suppressor - 16 and a fire arrestor - 17 installed at the outlet of a rotary vacuum pump - 10, through a shut-off valve - 18, is discharged into the atmosphere through a discharge gas pipeline - 19 through an exhaust gas pipeline - 9 equipped with a noise silencer - 20.

In the event of a stop of the modular degassing installation, the methane-air mixture is released into the atmosphere from the degassed mine due to natural draft through the valve with the pneumatic drive of the outlet pipe - 21, the flame arrester of the outlet pipe - 22, and the outlet pipe - 7.

Before starting or stopping the rotary vacuum pump - 10 it is purged with fresh air through a purge pipe - 23 having a shut-off valve with a pneumatic actuator.

All electrical and non-electrical equipment of the technological premises of the modular degassing installation is made in explosion-proof design.

The modular degassing unit based on a rotary vacuum pump - 10 has two typical layout options.

Option I.

The modular degassing installation (Fig. 1-5) includes the obligatory presence of at least one evacuation module - 1, at least one purification module - 2 and one control module - 3 (Fig. 1 shows the solid lines of at least one evacuation module ( MB) - 1, at least one cleaning module (MO) - 2 and one control module (MU) - 3; dashed lines indicate additional modules).

The vacuum module - 1 (Fig. 2) creates a vacuum in the degassing well - 4, as a result of which the methane-air mixture starts moving from the well - 4 towards the rotary vacuum pump (s) - 10. The vacuum module - 1 is made in the form of a metal body - 24 playing the role of a thermo-noise-insulating module-container, divided into two rooms isolated from each other by a sealed partition - 25. In the first (technological) room, one or more pump groups consisting of a rotary shaft are placed of a vacuum pump - 10 with an electric drive - 26. At the inlet of a rotary vacuum pump - 10, a shut-off valve - 14 with a pneumatic drive, a purge pipe - 23 with a shut-off valve and a pneumatic drive, a flame arrester - 15, and at the output of a rotary vacuum pump - 10, after a noise muffler - 16, respectively, the flame arrester - 17, the shut-off valve - 18, the discharge gas pipeline - 19, and the exhaust gas pipeline - 9 equipped with a noise suppressor of the vacuum module - 20 are strengthened.

The modules are equipped with a life support system, including an air composition control system - 27 installed inside the metal case of the thermally-noise-insulated module container - 24, as well as a heater - 28, a technological room lamp - 29, emergency ventilation fan - 30 and an autonomous automatic fire extinguishing system - 31.

In the second room, in the control system room, control equipment with a programmable controller - 32 (control cabinets, switching equipment, etc.) is located.

The cleaning module - 2 (Fig. 3) is also made in the form of a thermo- and noise-insulated module-container - 24, similar to the vacuum module - 1, and divided into two rooms isolated from each other by a sealed partition - 25. In the first (technological) room there are MVS cleaning system - 13 with automatic drain of liquid as it is filled into the drive - 44. In the event of an MDS stop, 12 MVS cleaning systems are connected to the collector, a vacuum gas pipeline - 6 is connected through the shut-off valve with the pneumatic drive of the cleaning system - 6, which communicates with the atmosphere for unimpeded exit of the MVS under natural pressure bypassing the vacuum pump through the shutter with pneumatic drive of the outlet pipe - 21, the flame arrester of the outlet pipe - 22 of the outlet pipe itself - 7. A vacuum gas pipeline -8 of purified methane-air mixture is fixed at the outlet of the cleaning system. Inside the metal case of the module - 27, in its technological room, an air composition control system was installed (for example, a methane sensor), heaters - 28, lamps - 29, an emergency ventilation fan - 30 and an autonomous fire extinguishing system - 31. In the second room, in the control system room contains control equipment - 33 with a cleaning module - 2 (control cabinets, switching equipment, etc.).

The modular degassing unit based on rotary vacuum pumps - 10 is equipped with an analysis system - 34 of the composition of the methane-air mixture passing through the main gas pipeline - 5, as well as a system for determining its flow rate - 35 in the vacuum gas pipeline - 8 of the already purified methane-air mixture. This equipment carries out continuous monitoring of the performance of MDLs and the concentration of methane in the evacuated methane-air mixture).

The control module - 3 contains the operator’s workstation. The module is made in the form of a metal thermally insulated body - 36, with a control panel - 38, lamps - 39, convectors - 40, necessary pieces of furniture - 41, air conditioning - 42 and a bathroom - 43.

When combining the cleaning module - 2 and the control module - 3 into one cleaning module (Fig. 2), an operator’s room is added to it, separated from the technological room by a sealed partition - 25. In FIG. Figure 5 shows the option of placing the main equipment in the cleaning module - 2, combined with the control module - 3.

Option II:

The modular degassing installation (Fig. 6-7) includes the presence of at least one evacuation module - 1 and one control module - 3 (Fig. 6 shows in solid lines one combined evacuation module - 1, with one cleaning module - 2 and one control module - 3; dashed lines indicate additional integrated vacuum modules - 1).

The modular degassing installation option II differs from option I by combining in one module the equipment of the evacuation module of option I and the equipment of the cleaning module of option I and excluding from the equipment of the evacuation module of shut-off valves with pneumatic actuators - 14 and - 18, respectively, at the inlet and outlet of the rotary vacuum pump

In FIG. 7 shows the combined placement of the main equipment of the vacuum module -1 and the cleaning module - 2 in one metal case - 24 thermo-noise-insulated module container. The control module for option II of the layout of the MRL is similar to option I.

Thus, the modular degassing installation does not require water to operate, noise characteristics are reduced by installing effective noise mufflers at the outlet of the vacuum rotary pump and using a thermo-noise-insulated module container. Purge pipelines were installed for each rotary vacuum pump, which made it possible to purge one vacuum pump while another was operating, and an automated control system for the degassing installation (ACS DU) was developed and introduced, which ensures the operation of the MRL in both automatic (without human intervention) and manual modes, transfer of operational information on the operating parameters of the MRL to the mine control room, as well as work within the framework of a unified aerogas control system for the AGK mine.

Claims (2)

1. A modular degassing installation containing vacuum pumps connected to a degassing well, gas concentration, pressure, temperature and gas meter meters, control and emergency protection units with a gas mixture discharge system into the atmosphere and fire arresters installed on gas mixture supply pipelines , automatic valves installed on gas pipelines for discharging the gas mixture into the atmosphere, an emergency protection device, microcontrollers for processing data and generating control signals alov, characterized in that the installation is made in the form of evacuation, cleaning and control modules integrated into a single complex, at least one rotary vacuum pump is installed in the evacuation module, and the cleaning module is connected to the degassing well through main and vacuum gas pipelines, the installation includes mandatory presence of at least one evacuation module, at least one cleaning module and one control module, while the evacuation module is made in the form of a metal casing, representing a thermo-noise-insulating module-container, divided into two rooms: a technological room and a control system room, isolated from each other by a sealed partition, one or several pump groups are placed in the technological room, each group contains a rotary vacuum pump at the entrance of which a shut-off valve with a pneumatic actuator, a purge pipe with a shut-off valve and a pneumatic actuator and a fire arrester, and the pump itself is electrically driven, at the outlet of a rotary vacuum pump, after hl noise suppressor, a flame arrester, a shut-off valve, a discharge and exhaust gas pipelines are installed, while the exhaust gas pipeline is equipped with a noise muffler, in the second room, in the control system room, control equipment with a programmable controller is placed, the cleaning module is also made in the form of a metal thermo and noise insulated module -container similar to the evacuation module and divided into two rooms, isolated from each other by a sealed partition, are placed in the technological room with a methane-air mixture cleaning system with automatic discharge of liquid into the accumulator, a vacuum gas pipeline is connected to the collector of the methane-air mixture cleaning system through a shut-off valve with a pneumatic drive of the cleaning system, while the vacuum pipeline is made communicating with the atmosphere through a valve with a pneumatic drive of the outlet pipe, its flame arrester and the outlet pipe itself, for unhindered exit of the methane-air mixture under natural pressure, bypassing the vacuum pump in case of a stop of the modular degassing device new, a vacuum gas pipeline of purified methane-air mixture is installed at the outlet of the cleaning system, life support equipment similar to the devices of the vacuum module is installed in the technological room of the metal casing of the module, namely the air composition control system, for example, methane sensor, heaters, room lamps, emergency ventilation fan and autonomous automatic fire extinguishing system, in the control system room the control equipment of the cleaning module is located, system the topic of analysis of the composition of the methane-air mixture passing through the main gas pipeline, and a system for determining the flow rate in the vacuum gas pipeline of the purified methane-air mixture. 2. The modular degassing installation according to claim 1, characterized in that the equipment of the vacuum module and the equipment of the cleaning module are installed in one common metal case, and the rotary vacuum pump installed in the sector of the vacuum module is made without shut-off valves with pneumatic actuators at its input and output .

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