CN213012705U

CN213012705U - Coal bed gas dust removal dewatering system

Info

Publication number: CN213012705U
Application number: CN202021511735.8U
Authority: CN
Inventors: 张留瑜; 薛永攀; 齐发
Original assignee: Hefei Wanhao Energy Equipment Co ltd
Current assignee: Hefei Wanhao Energy Equipment Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-04-20
Anticipated expiration: 2030-07-27

Abstract

The utility model provides a coal bed gas dedusting and dewatering system, which comprises a fire arrester, a primary filtering device, a cold drying unit, a separating device and a secondary filtering device which are communicated in sequence, wherein the fire arrester is used for preventing open fire from entering front-end equipment when the coal bed gas is combusted; the primary filtering device is used for filtering dust particles with the particle size of more than 10 microns in the coal bed gas and discharging a small amount of water; the cold drying unit can generate chilled water for cooling the coal bed gas to condense saturated water contained in the coal bed gas; the separation device is used for separating dust particles and condensed water in the coal bed gas, and the dust particles and the condensed water are discharged from the bottom of the separator; the secondary filtering device is used for filtering dust particles with the particle size of more than 1 mu m in the coal bed gas. The utility model discloses a by spark arrester, one-level filter equipment, the dust removal dewatering system that the unit, separator and second grade filter equipment are constituteed futilely, but simple high efficiency, continuous operation's coal bed gas dust removal dehydration technology have been realized.

Description

Coal bed gas dust removal dewatering system

Technical Field

The utility model relates to a clean energy technical field, concretely relates to coal bed gas dust removal dewatering system.

Background

Coal bed gas is an important resource which can be exploited and utilized, is clean and high-quality energy and chemical raw materials which rise internationally in nearly twenty years, is stored in a coal bed, takes methane as a main component, takes hydrocarbon gas which is adsorbed on the surface of coal matrix particles as a main component and partially dissociated in coal pores or dissolved in coal bed water, is an associated mineral resource of coal, belongs to unconventional natural gas, is commonly called as 'gas', generates 2-5 times of calorific value of general coal, generates 1 cubic meter of pure coal bed gas equivalent to 1.13kg of gasoline or 1.21kg of standard coal, has the calorific value equivalent to natural gas, can be mixed and transported with the natural gas for use, is clean after combustion, hardly generates any waste gas, and is good industrial, chemical, power generation and residential life fuel.

The coal bed gas mined under the natural state contains a large amount of moisture and dust, in order to improve the utilization rate of coal bed gas resources and prevent the water and dust contained coal bed gas from causing the hidden troubles such as subsequent equipment blockage or water attack, the coal bed gas is generally required to be treated to remove the moisture and the dust in the coal bed gas, but the coal bed gas purification system under the prior art is difficult to realize continuous operation, and the efficiency of dehydration and purification of the coal bed gas is greatly influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a but continuous operation's coal bed gas dust removal dewatering system that the flow is simple, the low power dissipation, high-efficient safety to satisfy coal bed gas purification technology's demand.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a coal bed gas dust removal dewatering system, includes that communicate in proper order:

the flame arrester is used for preventing open fire from entering the front-end equipment when the coal bed gas is combusted;

the primary filtering device is used for filtering dust particles above 10 in the coal bed gas and discharging a small amount of water;

the cold drying unit can generate chilled water for cooling the coal bed gas to condense saturated water contained in the coal bed gas;

the separation device is used for separating dust particles and condensed water in the coal bed gas, and the dust particles and the condensed water are discharged from the bottom of the separator;

and the secondary filtering device is used for filtering more than 1 dust particle in the coal bed gas.

Preferably, a booster fan is arranged between the separation device and the secondary filtering device.

The utility model discloses a by spark arrester, one-level filter equipment, the dust removal dewatering system that the unit, separator and second grade filter equipment are constituteed futilely, but simple high efficiency, continuous operation's coal bed gas dust removal dehydration technology have been realized.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

in the figure: 1. a flame arrestor; 2. a primary filtration device; 3. a cold drying unit; 4. a separation device; 5. a secondary filtration device; 6. a booster fan.

Detailed Description

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The coal bed gas dedusting and dewatering system shown in fig. 1 comprises a flame arrester, a primary filtering device, a cold drying unit, a separating device and a secondary filtering device which are sequentially communicated, wherein the flame arrester is used for preventing open fire from entering front-end equipment when coal bed gas is combusted; the primary filtering device is used for filtering dust particles above 10 in the coal bed gas and discharging a small amount of water; the cold drying unit can generate chilled water for cooling the coal bed gas to condense saturated water contained in the coal bed gas; the separation device is used for separating dust particles and condensed water in the coal bed gas, and the dust particles and the condensed water are discharged from the bottom of the separator; the secondary filter device is used for filtering more than 1 dust particle in the coal bed gas.

Because coal bed gas contains a large amount of dust, and contains oxygen in some coal bed gas, set up the spark arrester before removing dust dehydration and guarantee safety, this preferred embodiment spark arrester 1 adopt water-sealed formula spark arrester for prevent that open fire from getting into front end equipment when taking place to burn, thereby protect the safety of front end equipment.

The primary filter device of the preferred embodiment adopts a mechanical filter, so that the dust particles in the coal bed gas at the outlet of the primary filter device are below 10.

The separation device 4 adopts a cyclone separator, and utilizes centrifugal force to separate dust particles and condensed water in the coal bed gas. The coal bed gas containing dust and condensed water enters the cyclone separator and then enters the cyclone separating pipe along the axial direction to generate strong rotation, and the dust and liquid drops with high density are thrown to the inner wall of the separator under the action of centrifugal force and flow to the bottom of the separator along the cylinder wall under the action of gravity. The rotary airflow flows upwards in the cylinder body to the coal bed gas chamber through the air duct and flows out from an outlet at the top of the separator.

The secondary filtering device consists of a coalescence type filter element and is used for filtering more than 1 dust particle in the coal bed gas.

In specific use, freeze-drying unit 3 can produce about 5 ℃ chilled water and cool off coal bed gas, makes the saturated water that contains in the coal bed gas condense fast, accomplishes preliminary dehydration process, and the refrigerating unit can automatic control temperature, prevents that condensing temperature from crossing excessively, causes the condensate water to freeze, reduces the dehydration effect.

The separation device and the secondary filtering device are provided with the booster fan 6 therebetween, the booster fan can realize the suction effect, ensure the stable input system of the coal bed gas, and simultaneously can also ensure the temperature return of the coal bed gas after the dehydration of the refrigerating unit, and ensure the temperature requirement of the subsequent refining treatment process.

The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a coal bed gas dust removal dewatering system which characterized in that, including communicating in proper order:

the fire arrestor (1) is used for preventing open fire from entering front-end equipment when coal bed gas is combusted;

the primary filtering device (2) is used for filtering dust particles above 10 in the coal bed gas and discharging a small amount of water;

the cooling and drying unit (3) can generate chilled water for cooling the coal bed gas to condense saturated water contained in the coal bed gas;

the separation device (4) is used for separating dust particles and condensed water in the coal bed gas, and the dust particles and the condensed water are discharged from the bottom of the separator;

and the secondary filtering device (5) is used for filtering more than 1 dust particle in the coal bed gas.

2. A coal bed gas dedusting and dewatering system according to claim 1, characterized in that a booster fan (6) is arranged between the separation device and the secondary filtering device.