Pretreatment system of gas calorific value instrument and use method

Abstract

The invention discloses a gas calorific value instrument pretreatment system and a using method, and relates to the technical field of gas calorific value instrument pretreatment, the gas calorific value instrument pretreatment system comprises a gas inlet pipe, a coarse filtering device, a steam-water separator and a fine filtering system, 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 mixing 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 invention relates to the technical field of pretreatment of gas calorific value meters, and in particular to a pretreatment system of a gas calorific value meter and a use method thereof. Background Art

[0002] The wide and thick plate calorific value meter is an instrument used to measure the calorific value of the mixed gas combustion in the heating furnace. Its function is to adjust the air-fuel ratio of the heating furnace through the data transmitted by the calorific value meter so that the heating furnace can reach the best combustion state. The wide and thick plate calorific value meter has been used for nearly 20 years. The calorific value meter has been unable to work normally due to the difficulty of air intake in the pretreatment system and inaccurate display. The existing pretreatment system cleaning not only takes a long time but also is difficult to clean the tar and naphthalene in the gas. The abnormal operation of the pretreatment system not only makes the calorific value display abnormal, but also when the impurities and water vapor in the gas enter the calorific value meter, it will cause damage to the core components of the host, and eventually lead to the overall scrapping of the calorific value meter, causing huge losses. Summary of the invention

[0003] The purpose of the present invention is to provide a gas calorific value meter pretreatment system and use method 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 wide and thick plate calorific value meter measurement and effectively extend the service life of the wide and thick plate calorific value meter.

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

[0005] The present invention 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 and communicated with one end of the coal gas inlet pipe away from the heating furnace 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 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 separate tar and naphthalene from the coal gas.

[0006] Preferably, the coarse filtering device comprises 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 gas-water separator through a pipeline, the gas outlet is arranged above the oil-dust filter layer, and the gas outlet is used to connect to 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 communicates with 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 filtering 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 also includes a pressure reducing valve, which is arranged on the pipeline between the steam-water separator and the fine filtration system.

[0013] The present invention also provides a method for using the gas calorific value meter pretreatment system as described in any one of the above items, characterized in that it comprises the following steps:

[0014] The coal gas from the heating furnace enters the coarse filtering device through the coal gas inlet pipe, and the coarse filtering device filters the coarse impurities in the coal gas. Then the coal gas enters the steam-water separator, and the steam-water separator separates the water in the coal gas. Then the coal gas enters the fine filtering system, and the fine filtering system filters the tar and naphthalene in the coal gas and sends the coal gas to the wide and thick plate calorific value meter.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The present invention provides a coal gas calorific value meter pretreatment system and a use method. 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 a main unit of the calorific value meter caused by impurities and water vapor, reduces the risk of equipment scrapping, and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

[0018] Figure 1 A structural cross-sectional view of a pretreatment system for a gas calorific value meter provided by the present invention;

[0019] Figure 2 A structural schematic diagram of a fine filtration system in a pretreatment system of a gas calorific value meter provided by the present invention;

[0020] In the figure: 1. Gas inlet pipe; 2. Y-type coarse filter; 3. Gas-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

[0021] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0022] The purpose of the present invention is to provide a gas calorific value meter pretreatment system and use method 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 wide and thick plate calorific value meter measurement and effectively extend the service life of the wide and thick plate calorific value meter.

[0023] 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 embodiments.

[0024] Embodiment 1

[0025] This embodiment provides a gas calorific value meter preprocessing system, such as Figures 1-2As shown, it includes: a gas inlet pipe 1, a coarse filtering device, a steam-water separator 3 and a fine filtering system 4, wherein 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 and communicated with the end of the gas inlet pipe 1 away from the heating furnace to filter the 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 coal 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, and the fine filtering system 4 is used to separate tar and naphthalene from the coal gas.

[0026] In a preferred solution of the present 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, which improves maintenance efficiency and reduces maintenance costs.

[0027] In a preferred solution of the present embodiment, the fine filtering system 4 includes a shell 5 and an oil-dust filtering layer, the shell 5 is provided with a gas inlet 11 and a gas outlet 12, the oil-dust filtering layer is arranged in the middle of the shell 5, the gas inlet 11 is arranged below the oil-dust filtering 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 filtering layer, and the gas outlet 12 is used to connect to the wide and thick plate calorific value meter.

[0028] In a preferred solution of this embodiment, the bottom of the shell 5 is an oil receiver 6, and the oil receiver 6 is used to collect the tar filtered out by the oil dust filter layer.

[0029] 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.

[0030] In a preferred solution of the present 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 for easy maintenance: cleaning is convenient and quick, maintenance efficiency is improved, and maintenance costs are reduced.

[0031] In a preferred scheme of the present embodiment, the oil and dust filtering 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.

[0032] In a preferred solution of the present embodiment, the pretreatment system of the gas calorific value meter further includes a pressure reducing valve 10, which is arranged on the pipeline between the steam-water separator 3 and the fine filtering system 4. 1: when the gas inlet pressure is 5KPA, the steam-water separation valve is opened to 90%, the coarse filter is opened to 60%, and the pressure reducing valve 10 is adjusted to adjust the pressure to 3KPA; 2: when the gas inlet pressure is 8KPA, the steam-water separation valve is opened to 80%, the coarse filter is opened to 40%, and the pressure reducing valve 10 is adjusted to adjust the pressure to 3KPA; 3: when the gas inlet pressure is 10KPA, the steam-water separation valve is opened to 70%, the coarse filter is opened to 30%, and the pressure reducing valve 10 is adjusted to adjust the pressure to 3KPA. According to different gas inlet pressures, the opening of the steam-water separation valve and the coarse filter, as well as the pressure of the pressure reducing valve 10 are adjusted to make the system reach the best working state.

[0033] The present invention also provides a method for using the gas calorific value meter pretreatment system as described above, characterized in that it comprises the following steps:

[0034] The gas first passes through the coarse filter to filter out coarse impurities, and then enters the steam-water separator 3, where the gas is separated by different specific gravities and the impurities enter the water. Then the pressure is stabilized by the decompression system, and finally enters the fine filter, passing through the oil receiver 6, stainless steel balls and fiber filter cotton from bottom to top, filtering out impurities such as tar and naphthalene in the gas, so that the calorimeter can work normally.

[0035] 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 the maintenance efficiency and reduces the maintenance cost.

[0036] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A gas calorific value meter pretreatment system, characterized in that: 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 and communicated with an end of the coal gas inlet pipe away from the heating furnace to filter coarse impurities in the coal gas transported by the coal 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 remove tar and naphthalene from coal gas.

2. The gas calorific value meter pretreatment system according to claim 1 is 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 gas-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.

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

5. The gas calorific value meter pretreatment system according to claim 4 is 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 filtering 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 filtering system.

9. A method for using the gas calorific value meter pretreatment system according to any one of claims 1 to 8, characterized in that: The following steps are involved: The coal gas from the heating furnace enters the coarse filtering device through the coal gas inlet pipe, and the coarse filtering device filters the coarse impurities in the coal gas. Then the coal gas enters the steam-water separator, and the steam-water separator separates the water in the coal gas. Then the coal gas enters the fine filtering system, and the fine filtering system filters the tar and naphthalene in the coal gas and sends the coal gas to the wide and thick plate calorific value meter.

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