CN211235147U - Coal mill gas sampling device and coal powder filter thereof - Google Patents
Coal mill gas sampling device and coal powder filter thereof Download PDFInfo
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- CN211235147U CN211235147U CN201921213294.0U CN201921213294U CN211235147U CN 211235147 U CN211235147 U CN 211235147U CN 201921213294 U CN201921213294 U CN 201921213294U CN 211235147 U CN211235147 U CN 211235147U
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Abstract
The utility model relates to a sampling equipment technical field provides a coal pulverizer gets gas sampling device and buggy filter thereof, can solve the easy problem of wearing and tearing of sampling device among the prior art. Coal pulverizer gets gas sampling device's buggy filter includes: a cylindrical filter element and a shell which is covered outside the filter element; the outer shell covers the outer side of the whole filter element and is provided with a ventilation opening for air to enter the filter element, or the outer shell covers only one section of the inner end of the filter element to shield the end part of the filter element. The shell that sets up in the filter core outside, no matter the cover is established in the whole outside of filter core or only the cover is established in the filter core inner, can both protect as the inner of weak link in the filter core, avoids the inner of buggy direct impact filter core, protects the filter core, has reduced the inner damaged possibility because of buggy impact of filter core, has improved pulverized coal filter's life.
Description
Technical Field
The utility model relates to a sampling equipment technical field, concretely relates to coal pulverizer gets gas sampling device and buggy filter thereof.
Background
The coal mill is a main device of a coal-fired unit pulverizing system of a thermal power plant, and is a power machine for grinding raw coal to meet the suspension combustion fineness of a boiler. The thinner the coal powder is, the larger the contact area between the coal powder and air is, so that the oxidation reaction of the coal powder and oxygen is intensified, CO gas is generated in the coal mill, and meanwhile, the incomplete combustion of the coal powder is caused by heat generated by friction when the coal mill works, and a large amount of CO gas is also generated. An increase in the concentration of CO gas in the coal mill can reduce the ignition point of the combustible mixture, increasing the likelihood of a fire or explosion in the coal mill, which is dangerous.
The high concentration of CO gas in the coal mill is the main reason for causing the natural explosion of the coal mill, so that a technician can judge whether the coal mill is safe or not by detecting the concentration of the CO gas in the coal mill. Among the prior art, the technical staff can get the inside gas of coal pulverizer through bayonet gas sampling device extraction earlier, gets the buggy that gas sampling device can filter in the air current, only makes during gaseous entering into the device, accomplishes filterable gas and carries out the preliminary treatment back, sends back level sensor through the gas circuit and comes the analysis and detection to the component. However, in the process of sampling gas, pulverized coal in the gas flow can wear a sampling device inserted into the coal mill, particularly the end close to the center of the gas flow in the sampling device, and after the end is worn by the pulverized coal, the pulverized coal enters the sampling device, so that the problems of gas circuit blockage, rear-stage sensor damage and the like can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a coal dust filter of a coal mill gas sampling device, which can solve the problem that the sampling device is easy to wear in the prior art; an additional object of the utility model is to provide an use this pulverized coal filter's coal pulverizer to get gas sampling device, the wearability is good, long service life.
In order to achieve the above object, the utility model provides a coal pulverizer gets gas sampling device's pulverized coal filter adopts following scheme:
coal pulverizer gets coal dust filter of gas sampling device includes:
a cylindrical filter element and a shell which is covered outside the filter element;
the shell covers the outer side of the whole filter element and is provided with a ventilation port for air to enter the filter element, or the shell only covers one section of the inner end of the filter element so as to shield the end part of the filter element.
The beneficial effects are that: the shell that sets up in the filter core outside, no matter the cover is established in the whole outside of filter core or only the cover is established in the filter core inner, can both protect as the inner of weak link in the filter core, avoids the inner of buggy direct impact filter core, protects the filter core, has reduced the inner damaged possibility because of buggy impact of filter core, has improved pulverized coal filter's life.
Furthermore, the shell is a sleeve structure arranged on the outer side of the whole filter element, one end of the shell corresponding to the outer end of the filter element is connected with a flange plate, and the filter element is arranged in a space enclosed by the shell and the flange plate.
The beneficial effects are that: the shell can cover the holistic outer peripheral face of filter core with the ring flange, has reduced the area that the filter core directly receives the buggy and has improved the support intensity of shell to the filter core, and operating personnel utilizes the ring flange to keep the filter core fixed with the coal pulverizer easily simultaneously.
Furthermore, both ends of the filter element are provided with openings, the opening at the inner end is provided with a blocking cover, and the blocking cover is fixed relative to the shell so as to press the filter element to the flange plate.
The beneficial effects are that: the blanking cover and the shell are fixed oppositely, the filter element is pressed to the flange plate by the constraint of the shell to the blanking cover, the structure is simple, and the sealing performance of openings at two ends of the filter element is ensured.
Further, the blanking cover is fixed with the housing by screws extending in the radial direction of the blanking cover.
The beneficial effects are that: the plug cover and the shell are connected by the radially arranged screws, the structure is simple, the assembly is convenient for operators, and the shell is replaced by the operators through disassembling the screws after the shell is worn.
Furthermore, the ventilation port is arranged at the middle position of the windward side and the leeward side of the shell.
The beneficial effects are that: the ventilation openings are arranged in the middle of the windward side and the leeward side, so that gas can enter and exit the filter element more intensively, and other parts of the filter element are protected by the shell, so that the area of direct impact of pulverized coal is reduced.
Further, the housing is made of a stainless steel material.
The beneficial effects are that: the shell is made of stainless steel materials, and has high strength to resist the impact of pulverized coal.
In order to achieve the above object, the utility model provides a coal pulverizer gets gas sampling device adopts following scheme:
coal pulverizer gets gas sampling device includes:
the pulverized coal filter comprises a cylindrical filter element and a shell which covers the outer side of the filter element; the shell covers the outer side of the whole filter element and is provided with a ventilation port through which gas enters the filter element, or the shell only covers one section of the inner end of the filter element so as to shield the end part of the filter element;
and one end of the sampling gas circuit is communicated with a filter element in the pulverized coal filter, and the other end of the sampling gas circuit is communicated with a detection instrument for detecting gas components to guide gas in the filter element to enter the detection instrument.
The beneficial effects are that: the shell that sets up in the filter core outside, no matter the cover is established in the whole outside of filter core or only the cover is established in the filter core inner, can both protect as the inner of weak link in the filter core, avoids the inner of buggy direct impact filter core, protects the filter core, has reduced the inner damaged possibility because of the buggy strikes of filter core, has improved the holistic life of buggy filter and coal pulverizer gas sampling device.
Furthermore, the shell is a sleeve structure arranged on the outer side of the whole filter element, one end of the shell corresponding to the outer end of the filter element is connected with a flange plate, and the filter element is arranged in a space enclosed by the shell and the flange plate.
The beneficial effects are that: the shell can cover the holistic outer peripheral face of filter core with the ring flange, has reduced the area that the filter core directly receives the buggy and has improved the support intensity of shell to the filter core, and operating personnel utilizes the ring flange to keep the filter core fixed with the coal pulverizer easily simultaneously.
Furthermore, both ends of the filter element are provided with openings, the opening at the inner end is provided with a blocking cover, and the blocking cover is fixed relative to the shell so as to press the filter element to the flange plate.
The beneficial effects are that: the blanking cover and the shell are fixed oppositely, the filter element is pressed to the flange plate by the constraint of the shell to the blanking cover, the structure is simple, and the sealing performance of openings at two ends of the filter element is ensured.
Further, the blanking cover is fixed with the housing by screws extending in the radial direction of the blanking cover.
The beneficial effects are that: the plug cover and the shell are connected by the radially arranged screws, the structure is simple, the assembly is convenient for operators, and the shell is replaced by the operators through disassembling the screws after the shell is worn.
Furthermore, the ventilation port is arranged at the middle position of the windward side and the leeward side of the shell.
The beneficial effects are that: the ventilation openings are arranged in the middle of the windward side and the leeward side, so that gas can enter and exit the filter element more intensively, and other parts of the filter element are protected by the shell, so that the area of direct impact of pulverized coal is reduced.
Further, the housing is made of a stainless steel material.
The beneficial effects are that: the shell is made of stainless steel materials, and has high strength to resist the impact of pulverized coal.
Furthermore, the sampling gas circuit is provided with a transparent section for people to observe the gas flow.
The beneficial effects are that: an operator can visually see whether the airflow contains the pulverized coal or not through the transparent section, so that whether the pulverized coal filter in the coal mill is damaged or not is judged.
Furthermore, a filter screen which is positioned at the front side of the transparent section in the gas flowing direction is arranged in the sampling gas circuit.
The beneficial effects are that: the filter screen is arranged on the front side of the transparent section, so that pulverized coal entering the gas circuit can be secondarily filtered, and the pulverized coal is prevented from flowing to a detection instrument along with gas.
Furthermore, a communicating hole communicated with the inner cavity of the filter element is arranged on the flange plate, and a joint connected with the sampling gas circuit is arranged on one outward side of the communicating hole.
The beneficial effects are that: when the flange plate is used for fixing the filter element, the flange plate is used for switching the coal powder filter and the sampling gas circuit, the structure is simple, and the arrangement of redundant structures is reduced.
Drawings
Fig. 1 is a schematic perspective view of a gas sampling device of a coal pulverizer of the present invention;
FIG. 2 is a cross-sectional view of the gas sampling device of the coal pulverizer of the present invention;
in the figure: 10-a filter element; 11-blocking cover; 12-a screw; 20-a housing; 30-sampling gas circuit; 31-copper ball valves; 32-a transparent tube; 33-a filter screen; 40-flange plate; 41-joint.
Detailed Description
The specific embodiments of the gas sampling device and the coal dust filter of the gas sampling device for the coal mill of the present invention are now described with reference to the drawings.
As shown in fig. 1, for the utility model discloses well coal pulverizer gets an embodiment of gas sampling device, the coal pulverizer gets gas sampling device mainly used draws the gas in the coal pulverizer, comes to detect the content of carbon monoxide in the gas. The coal mill gas sampling device comprises a coal powder filter mainly composed of a filter element 10 and a shell 20, and a sampling gas circuit 30 connected with the coal powder filter and used for conveying filtered gas to a detection instrument. In the pulverized coal filter, the filter element 10 is in a cylindrical shape with two open ends, when in use, one end of the air flow center in the coal mill of the filter element 10 is an inner end, and the end close to the sampling air passage 30 is an outer end. The filter element 10 is made of ceramic material, and a plug cover 11 made of stainless steel is arranged at the opening of the inner end. The casing 20 of the pulverized coal filter is a sleeve with a length slightly longer than that of the filter element 10, is made of stainless steel materials, and covers the outer side of the whole filter element 10 to prevent pulverized coal from directly impacting the filter element 10 and protect the inner end of the filter element 10 serving as a weak part.
As shown in fig. 2, when in use, the housing 20 has a windward side opposite to the airflow and a leeward side opposite to the windward side, and a large ventilation opening is respectively arranged at the middle position of the windward side and the leeward side, the ventilation opening is in an oblong shape, the airflow flows to the filter element 10, the filter element 10 can filter the pulverized coal in the airflow, and only the airflow containing the CO gas enters the filter element 10. The shell 20 is provided with a flange 40 at one end opposite to the outer end of the filter element 10, the flange 40 is provided with a counter bore for the shell 20 to insert, the shell 20 is inserted into the counter bore and fixedly connected with the flange 40 by welding, and the filter element 10 is integrally positioned in a space enclosed by the shell 20 and the flange 40.
The shell 20 is fixedly connected with the plug cover 11 positioned at the inner end of the filter element 10 through a screw 12, the screw 12 extends along the radial direction of the plug cover 11, a fastener through hole for the screw 12 to pass through is formed in the shell 20, an operator firstly puts the filter element 10 into the shell 20 during assembly, the outer end of the filter element 10 is propped against the flange plate 40, an elastic sealing ring is arranged between the two, then the plug cover 11 is placed at the opening at the inner end of the filter element 10, the elastic sealing ring is arranged between the plug cover 11 and the filter element 10, the plug cover 11 is rotated to be aligned with the fastener through hole on the shell 20, the plug cover 11 is connected with the shell 20 through the screw 12, the filter element 10 is pressed by the plug cover 11, and the filter element 10 is pressed towards the flange plate.
The flange 40 is provided with bolt holes adapted to the coal mill, and an operator can fix the flange 40 to the coal mill to stably support the filter cartridge 10 in a powder taking pipe of the coal mill. The flange 40 is provided with a communication hole for communicating the counter bore with the outside environment, the gas in the inner cavity of the filter element 10 can flow out through the communication hole on the flange, and the outward side of the communication hole is provided with a joint 41 for connecting with the sampling gas circuit 30.
Have set gradually copper ball valve 31 along the direction that gas gos forward in the sampling gas circuit 30, hyaline tube 32 and to filter screen 33, copper ball valve 31 can control sampling gas circuit 30 and pulverized coal filter's break-make, and whether operating personnel judge whether pulverized coal filter is damaged through observing whether there is pulverized coal in the hyaline tube 32, and filter screen 33 is located the front side of hyaline tube 32 on the gas flow direction, can carry out secondary filter to the pulverized coal, operating personnel is connected sampling gas circuit 30 and air pump and is bled, make the gas in the filter core 10 pumped to detecting instrument.
In other embodiments, the housing may be provided only at the inner end of the cartridge, for example by still relying on a cap to connect to the housing such that the housing covers a section of the inner end of the cartridge.
In other embodiments, the filter element made of ceramic material can be directly connected to the housing by brazing, whether by means of a housing covering the entire outside of the filter element or by means of a housing covering only the inner end of the filter element.
In other embodiments, the filter element may be a cylindrical structure with only one end open, with the filter element opening toward the flange for communication with the sampling gas path, and is not limited to the use of a double-ended opening in cooperation with an end cap.
In other embodiments, the housing covering the entire outer side of the filter element may be welded to the cap, or a thread may be provided on the housing, and a thread screwed to the housing may be provided on the cap, and both may be connected by a thread.
In other embodiments, the housing may be provided with a plurality of ventilation ports spaced apart from each other on the entire housing, and the gas can enter the filter element through positive pressure, without being limited to the ventilation ports on the windward side and the leeward side.
In other embodiments, the housing may be made of high temperature, impact resistant ceramics, plastics, etc., without limitation to stainless steel materials.
In other embodiments, the flange may be integrally formed with the housing and is not limited to the form of welding the flange to the housing.
The utility model discloses the structure of well coal pulverizer get gas sampling device's coal dust filter is the same with the structure of above-mentioned coal pulverizer get gas sampling device in the embodiment coal dust filter, and the effect that can play also corresponds the same, consequently about the utility model discloses well coal dust filter's embodiment is repeated explanation no longer.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. Coal pulverizer gets coal powder filter of gas sampling device, its characterized in that: comprises that
A cylindrical filter element and a shell which is covered outside the filter element;
the shell covers the outer side of the whole filter element and is provided with a ventilation port for air to enter the filter element, or the shell only covers one section of the inner end of the filter element so as to shield the end part of the filter element.
2. The pulverized coal filter of the coal mill gas sampling device according to claim 1, characterized in that: the shell is a sleeve structure arranged on the whole outer side of the filter element, one end of the shell corresponding to the outer end of the filter element is connected with a flange plate, and the filter element is arranged in a space enclosed by the shell and the flange plate.
3. The pulverized coal filter of the coal mill gas sampling device according to claim 2, characterized in that: the both ends of filter core all are provided with the opening, and the opening part of inner is provided with the blanking cover, and the blanking cover is through pressing the filter core to the ring flange with shell relatively fixed.
4. The pulverized coal filter of the coal mill gas sampling device according to claim 3, characterized in that: the blanking cover and the shell are fixed through screws extending along the radial direction of the blanking cover.
5. The pulverized coal filter of the coal mill gas sampling device according to any one of claims 1 to 4, characterized in that: the ventilation openings are arranged at the middle positions of the windward side and the leeward side of the shell.
6. The pulverized coal filter of the coal mill gas sampling device according to any one of claims 1 to 4, characterized in that: the housing is made of stainless steel material.
7. Coal pulverizer gets gas sampling device, its characterized in that: comprises that
The coal dust filter of the coal mill gas sampling device of any one of the claims 1-6;
and one end of the sampling gas circuit is communicated with a filter element in the pulverized coal filter, and the other end of the sampling gas circuit is communicated with a detection instrument for detecting gas components to guide gas in the filter element to enter the detection instrument.
8. The coal pulverizer gas sampling device of claim 7, wherein: the sampling gas circuit is provided with a transparent section for people to observe the gas flow.
9. The coal pulverizer gas sampling device of claim 8, wherein: and a filter screen positioned on the front side of the transparent section in the gas flowing direction is arranged in the sampling gas circuit.
10. The coal pulverizer gas sampling device of claim 7, wherein: the flange plate is provided with a communicating hole communicated with the inner cavity of the filter element, and one outward side of the communicating hole is provided with a joint connected with the sampling gas circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921213294.0U CN211235147U (en) | 2019-07-30 | 2019-07-30 | Coal mill gas sampling device and coal powder filter thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921213294.0U CN211235147U (en) | 2019-07-30 | 2019-07-30 | Coal mill gas sampling device and coal powder filter thereof |
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| Publication Number | Publication Date |
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| CN211235147U true CN211235147U (en) | 2020-08-11 |
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| CN201921213294.0U Active CN211235147U (en) | 2019-07-30 | 2019-07-30 | Coal mill gas sampling device and coal powder filter thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354284A (en) * | 2021-12-20 | 2022-04-15 | 清华大学 | Anti-blocking sampling device for coal mill outlet and installation method |
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2019
- 2019-07-30 CN CN201921213294.0U patent/CN211235147U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354284A (en) * | 2021-12-20 | 2022-04-15 | 清华大学 | Anti-blocking sampling device for coal mill outlet and installation method |
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