Pretreatment system of gas calorific value instrument

Abstract

The utility model discloses a pretreatment system of a gas calorific value instrument, which relates to the technical field of pretreatment of gas calorific value instruments and comprises a gas inlet pipe, a coarse filtering device, a steam-water separator and a fine filtering system, and one end of the gas inlet pipe is used for being communicated with a gas outlet of a heating furnace; one end of the coarse filtering device is connected and communicated with one end, far away from the heating furnace, of the coal gas inlet pipe so as to filter coarse impurities in coal gas conveyed by the coal gas inlet pipe; one end of the steam-water separator is used for being communicated with the coarse filtering device through a pipeline so as to separate water in the coal gas; one end of the fine filtration system is communicated with the steam-water separator through a pipeline, the other end of the fine filtration system is communicated with the wide and thick plate calorific value instrument through a pipeline, the fine filtration system is used for filtering tar and naphthalene in coal gas, the structure is simple, use is convenient, the measurement accuracy of the wide and thick plate calorific value instrument is effectively guaranteed, and the service life of the wide and thick plate calorific value instrument is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pretreatment of gas calorific value meters, in particular to a pretreatment system of a gas calorific value meter. Background Art

[0002] A calorimeter for thick and heavy plate is used to measure the calorific value of mixed gas combustion in a heating furnace. Its function is to adjust the furnace's air-fuel ratio based on data transmitted by the calorimeter to achieve optimal combustion. However, after nearly 20 years of use, the calorimeter was no longer functioning properly due to inaccurate display caused by air intake problems in the pretreatment system. Cleaning the existing pretreatment system was not only time-consuming but also difficult to remove tar and naphthalene from the gas. This malfunctioning pretreatment system not only caused erratic calorific value readings, but also caused damage to core components of the main unit when impurities and moisture in the gas entered the calorimeter, ultimately rendering the calorimeter useless and causing significant losses. Utility Model Content

[0003] The purpose of the utility model is to provide a gas calorific value meter pretreatment system to solve the problems existing in the above-mentioned prior art. It has a simple structure and is easy to use. It can effectively ensure the accuracy of the measurement of the wide and thick plate calorific value meter and effectively extend the service life of the wide and thick plate calorific value meter.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides a pretreatment system for a coal gas calorific value meter, comprising: a coal gas inlet pipe, a coarse filtering device, a steam-water separator and a fine filtering system, wherein one end of the coal gas inlet pipe is used to be connected to the coal gas outlet of a heating furnace; one end of the coarse filtering device is connected to and communicated with an end of the coal gas inlet pipe away from the heating furnace so as to filter coarse impurities in the coal gas transported by the coal gas inlet pipe; one end of the steam-water separator is used to be connected to the coarse filtering device through a pipeline so as to separate water from the coal gas; one end of the fine filtering system is used to be connected to the steam-water separator through a pipeline, and the other end is used to be connected to the wide and thick plate calorific value meter through a pipeline, and the fine filtering system is used to filter tar and naphthalene in the coal gas.

[0006] Preferably, the coarse filtration device includes two sets of Y-shaped coarse filters arranged in parallel.

[0007] Preferably, the fine filtration system includes a shell and an oil-dust filter layer, the shell is provided with a gas inlet and a gas outlet, the oil-dust filter layer is arranged in the middle of the shell, the gas inlet is arranged below the oil-dust filter layer, the gas inlet is connected to the steam-water separator through a pipeline, the gas outlet is arranged above the oil-dust filter layer, and the gas outlet is used to communicate with the wide and thick plate calorific value meter.

[0008] Preferably, the bottom of the shell is an oil receiver, and the oil receiver is used to collect the tar filtered out by the oil dust filter layer.

[0009] Preferably, a blocking plate is further included, and a cleaning opening is provided on the top of the shell. The blocking plate is used to be detachably fixedly connected to the top of the shell to open or close the cleaning opening.

[0010] Preferably, it further comprises an oil outlet and an oil outlet valve, wherein the oil outlet is arranged at the bottom of the shell and is connected to the oil receiver, and the oil outlet valve is arranged at the oil outlet to open or close the oil outlet.

[0011] Preferably, the oil and dust filter layer includes a circular steel plate, a stainless steel ball layer and a fiber filter cotton layer. The outer edge of the circular steel plate is used to be detachably sealed and connected to the inner wall of the shell. A plurality of oil drop holes are provided on the circular steel plate. The stainless steel ball layer is used to be placed on the circular steel plate, and the fiber filter cotton layer is used to be arranged above the stainless steel ball layer.

[0012] Preferably, it further comprises a pressure reducing valve, which is arranged on the pipeline between the steam-water separator and the fine filtration system.

[0013] Compared with the prior art, the utility model has achieved the following technical effects:

[0014] The utility model provides a pretreatment system for a coal gas calorific value meter. The coal gas of a heating furnace enters a coarse filtering device through a coal gas inlet pipe. The coarse filtering device filters coarse impurities in the coal gas. Then the coal gas enters a steam-water separator. The steam-water separator separates water in the coal gas. Then the coal gas enters a fine filtering system. The fine filtering system filters tar and naphthalene in the coal gas and then sends the coal gas to a wide and thick plate calorific value meter. Through multi-stage filtration and separation, impurities in the coal gas are effectively removed, so that the calorific value meter displays accurately, provides reliable data for adjusting the air-fuel ratio of the heating furnace, reduces damage to core components of the calorific value meter host by impurities and water vapor, reduces the risk of equipment scrapping, and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a structural cross-sectional view of the pretreatment system of the gas calorific value meter provided by the utility model;

[0017] Figure 2This is a structural diagram of the fine filtration system in the pretreatment system of the gas calorific value meter provided by the utility model;

[0018] In the figure: 1. Gas inlet pipe; 2. Y-type coarse filter; 3. Steam-water separator; 4. Fine filtration system; 5. Shell; 6. Oil receiver; 7. Round steel plate; 8. Stainless steel ball layer; 9. Fiber filter cotton layer; 10. Pressure reducing valve; 11. Gas inlet; 12. Gas outlet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The purpose of the utility model is to provide a gas calorific value meter pretreatment system to solve the problems existing in the above-mentioned prior art. It has a simple structure and is easy to use. It can effectively ensure the accuracy of the measurement of the wide and thick plate calorific value meter and effectively extend the service life of the wide and thick plate calorific value meter.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] Example 1

[0023] This embodiment provides a gas calorific value meter preprocessing system, such as Figures 1-2 As shown, it includes: a gas inlet pipe 1, a coarse filtering device, a steam-water separator 3 and a fine filtering system 4, one end of the gas inlet pipe 1 is used to communicate with the gas outlet 12 of the heating furnace; one end of the coarse filtering device is connected to and communicated with the end of the gas inlet pipe 1 away from the heating furnace to filter coarse impurities in the gas transported by the gas inlet pipe 1; one end of the steam-water separator 3 is used to communicate with the coarse filtering device through a pipeline to separate water from the gas; one end of the fine filtering system 4 is used to communicate with the steam-water separator 3 through a pipeline, and the other end is used to communicate with the wide and thick plate calorific value meter through a pipeline. The fine filtering system 4 is used to filter tar and naphthalene in the gas.

[0024] In a preferred solution of this embodiment, the coarse filtering device includes two sets of Y-shaped coarse filters 2 arranged in parallel. The Y-shaped coarse filters 2 are easy and quick to clean, thereby improving maintenance efficiency and reducing maintenance costs.

[0025] In a preferred solution of this embodiment, the fine filtration system 4 includes a shell 5 and an oil-dust filter layer. The shell 5 is provided with a gas inlet 11 and a gas outlet 12. The oil-dust filter layer is arranged in the middle of the shell 5. The gas inlet 11 is arranged below the oil-dust filter layer. The gas inlet 11 is connected to the steam-water separator 3 through a pipeline. The gas outlet 12 is arranged above the oil-dust filter layer. The gas outlet 12 is used to communicate with the wide and thick plate calorific value meter.

[0026] In a preferred solution of this embodiment, the bottom of the shell 5 is an oil receiver 6, which is used to collect tar filtered out by the oil dust filter layer.

[0027] In a preferred solution of this embodiment, the gas calorific value meter pretreatment system also includes a blocking plate, and a cleaning opening is provided on the top of the shell 5. The blocking plate is used to be detachably fixedly connected to the top of the shell 5 to open or close the cleaning opening.

[0028] In a preferred solution of this embodiment, the gas calorific value meter pretreatment system also includes an oil outlet and an oil outlet valve. The oil outlet is arranged at the bottom of the shell 5 and is connected to the oil receiver 6. The oil outlet valve is arranged at the oil outlet to open or close the oil outlet, which is convenient for maintenance: cleaning is convenient and quick, maintenance efficiency is improved, and maintenance costs are reduced.

[0029] In a preferred solution of this embodiment, the oil and dust filter layer includes a circular steel plate 7, a stainless steel ball layer 8 and a fiber filter cotton layer 9. The outer edge of the circular steel plate 7 is used to be detachably sealed and connected to the inner wall of the shell 5. A plurality of oil drop holes are provided on the circular steel plate 7. The stainless steel ball layer 8 is used to be placed on the circular steel plate 7, and the fiber filter cotton layer 9 is used to be arranged above the stainless steel ball layer 8.

[0030] In a preferred embodiment of this embodiment, the gas calorific value meter pretreatment system further includes a pressure reducing valve 10, which is disposed on the pipeline between the steam-water separator 3 and the fine filtration system 4. The following steps are performed: 1. When the gas inlet pressure is 5 kPa, the steam-water separator valve is opened to 90%, the coarse filter is opened to 60%, and the pressure reducing valve 10 is adjusted to 3 kPa. 2. When the gas inlet pressure is 8 kPa, the steam-water separator valve is opened to 80%, the coarse filter is opened to 40%, and the pressure reducing valve 10 is adjusted to 3 kPa. 3. When the gas inlet pressure is 10 kPa, the steam-water separator valve is opened to 70%, the coarse filter is opened to 30%, and the pressure reducing valve 10 is adjusted to 3 kPa. The openings of the steam-water separator valve and coarse filter, as well as the pressure of the pressure reducing valve 10, are adjusted according to different gas inlet pressures to achieve optimal system operation.

[0031] The present invention also provides a method for using the gas calorific value meter pretreatment system as described above, which is characterized by comprising the following steps:

[0032] The gas first passes through a coarse filter to remove coarse impurities, then enters the water separator 3, where the gas is separated by different specific gravities and the impurities are transferred to the water. The gas then passes through a pressure reducing system to stabilize the pressure before entering a fine filter. From bottom to top, it passes through an oil receiver 6, stainless steel balls, and fiber filter cotton, filtering out impurities such as tar and naphthalene from the gas, ensuring the proper functioning of the calorimeter.

[0033] The cleaning method of the fine filtration system 4 is as follows: remove the blocking plate, replace the fiber filter cotton, replace the stainless steel ball; open the oil drain valve to drain the tar in the oil receiver 6. The whole cleaning process takes 15 minutes. The cleaning is convenient and fast, which improves maintenance efficiency and reduces maintenance costs.

[0034] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A gas calorific value meter pretreatment system, characterized by: include: a gas inlet pipe, one end of which is connected to the gas outlet of the heating furnace; a coarse filtering device, one end of which is connected to and communicates with an end of the gas inlet pipe away from the heating furnace to filter coarse impurities in the gas transported by the gas inlet pipe; a steam-water separator, one end of which is connected to the coarse filtering device through a pipeline to separate water from the coal gas; as well as A fine filtration system, one end of which is connected to the steam-water separator through a pipeline, and the other end is connected to the wide and thick plate calorific value meter through a pipeline. The fine filtration system is used to filter tar and naphthalene in coal gas.

2. The gas calorific value meter pretreatment system according to claim 1, characterized in that: The coarse filtering device comprises two sets of Y-shaped coarse filters arranged in parallel.

3. The gas calorific value meter pretreatment system according to claim 1, characterized in that: The fine filtration system includes a shell and an oil-dust filter layer. The shell is provided with a gas inlet and a gas outlet. The oil-dust filter layer is arranged in the middle of the shell. The gas inlet is arranged below the oil-dust filter layer. The gas inlet is connected to the steam-water separator through a pipeline. The gas outlet is arranged above the oil-dust filter layer. The gas outlet is used to communicate with the wide and thick plate calorific value meter.

4. The gas calorific value meter pretreatment system according to claim 3, characterized in that: The bottom of the shell is an oil receiver, which is used to collect tar filtered out by the oil dust filter layer.

5. The gas calorific value meter pretreatment system according to claim 4, characterized in that: It also includes a blocking plate. A cleaning opening is provided on the top of the shell. The blocking plate is used to be detachably fixedly connected to the top of the shell to open or close the cleaning opening.

6. The gas calorific value meter pretreatment system according to claim 5, characterized in that: It also includes an oil outlet and an oil outlet valve. The oil outlet is arranged at the bottom of the shell and is connected to the oil receiver. The oil outlet valve is arranged at the oil outlet to open or close the oil outlet.

7. The gas calorific value meter pretreatment system according to claim 6, characterized in that: The oil and dust filter layer includes a circular steel plate, a stainless steel ball layer and a fiber filter cotton layer. The outer edge of the circular steel plate is used to be detachably sealed and connected to the inner wall of the shell. A plurality of oil drop holes are provided on the circular steel plate. The stainless steel ball layer is used to be placed on the circular steel plate, and the fiber filter cotton layer is used to be arranged above the stainless steel ball layer.

8. The gas calorific value meter pretreatment system according to claim 1, characterized in that: It also includes a pressure reducing valve, which is arranged on the pipeline between the steam-water separator and the fine filtration system.

Images