An online analyzer pre-treatment filter

Abstract

This utility model discloses a pretreatment filter for an online analyzer, including a coal-water slurry gasifier. A flange is installed on the top of the gasifier, and a water-gas inlet and a drain outlet are respectively provided at the bottom. A water-cooling jacket is installed on the side of the gasifier in a covered manner, with a cooling water inlet and a cooling water outlet at the top and bottom of the jacket, respectively. This utility model relates to the field of water-gas detection technology. This pretreatment filter for an online analyzer, by setting a water-cooling jacket around the gasifier and introducing flowing cooling water into the jacket, utilizes the high specific heat capacity of the cooling water to cool and lower the temperature of the water-gas entering the gasifier (down to 50-55 degrees Celsius). Furthermore, by installing a micron-sized filter element and a sprayer inside the gasifier, the filtration efficiency of the filter element can be improved.

Description

Technical Field

[0001] This utility model relates to the field of water gas detection technology, specifically to a pretreatment filter for an online analyzer. Background Technology

[0002] To continuously analyze and monitor the gas composition of the semi-water gas produced after combustion in coal-water slurry gasifiers, the industry typically installs multiple single-component or multi-component analyzers on each gasifier. The process adjusts oxygen and slurry flow rates based on the gas composition. However, the analyzers require sample gases that are dust-free, dry, and at suitable pressure and temperature; otherwise, the analyzers will be damaged and unable to properly guide process operations. Since the semi-water gas outlet temperature of the gasifier is around 180 degrees Celsius and contains a large amount of moisture and dust, it does not meet the analyzer's requirements. Currently, the analyzers are only equipped with primary dehydration, cooling, and pressure reduction treatments, leading to water contamination and coal ash blockage in the analyzed sample gas, causing analyzer damage and increasing maintenance workload for instrument technicians. This is a common problem in the industry for online monitoring and analysis of coal-water slurry gas outlets. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides an online analyzer pretreatment filter, which solves the problem that existing water gas analyzers are easily damaged due to water and ash in the sample gas.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: an online analyzer pretreatment filter, including a coal-water slurry gasifier, wherein a flange is installed on the top of the coal-water slurry gasifier, and a coal-water gas inlet and a drain outlet are respectively provided at the bottom of the coal-water slurry gasifier.

[0007] The side of the coal-water slurry gasifier is fitted with a water-cooled jacket, which has a cooling water inlet and a cooling water outlet at the top and bottom, respectively.

[0008] A filter element is installed in the middle of the inner cavity of the coal-water slurry gasifier, and a water gas outlet extending to the outside of the coal-water slurry gasifier is installed at the bottom of the filter element.

[0009] As a further preferred embodiment, the filter element is cylindrical, with an annular filter screen structure on the outer side and a hollow channel in the middle. After the water gas is filtered by the annular filter screen structure on the outer side, the filtered gas is discharged through the hollow channel and finally connected to the online analyzer through the water gas outlet.

[0010] As a further preferred embodiment, the bottom of the coal-water slurry gasifier is provided with a reflux port, a filter screen is provided at the reflux port, and multiple sets of spray pipes are provided on the inner wall of the coal-water slurry gasifier. All sets of spray pipes are connected to the reflux port through pipes, and a reflux pump is provided on the pipes.

[0011] As a further preferred embodiment, the filter element has a filter diameter of 4μm-6μm.

[0012] (III) Beneficial Effects

[0013] This invention provides a pretreatment filter for an online analyzer. It has the following advantages:

[0014] The pretreatment filter of this online analyzer uses a water-cooled jacket around the gasifier. Cooling water is introduced into the jacket, utilizing its high specific heat capacity to cool the water gas entering the gasifier (reducing the temperature to 50-55 degrees Celsius). Furthermore, the gasifier is equipped with micron-sized filter elements and sprayers inside, improving the filter efficiency and separating moisture and coal ash impurities from the water gas. The gas is discharged through the water gas outlet, while the impurities are discharged through the drain outlet, resulting in purer gas entering the analyzer and significantly reducing damage to the analyzer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0017] In the diagram: 1. Coal-water slurry gasifier; 2. Flange; 3. Coal-water gas inlet; 4. Water-cooled jacket; 5. Cooling water inlet; 6. Cooling water outlet; 7. Filter element; 8. Coal-water gas outlet; 9. Drainage outlet; 10. Pipeline; 11. Spray pipe; 12. Filter screen. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 As shown, this utility model provides a technical solution: an online analyzer pretreatment filter, including a coal-water slurry gasifier 1, with a flange 2 installed on the top of the coal-water slurry gasifier 1, and a coal-water gas inlet 3 and a drain outlet 9 respectively provided at the bottom of the coal-water slurry gasifier 1.

[0020] like Figure 1 As shown, a water-cooled jacket 4 is installed on the side of the coal-water slurry gasifier 1 in a covered manner. The top and bottom of the water-cooled jacket 4 are respectively provided with a cooling water inlet 5 and a cooling water outlet 6.

[0021] like Figure 1 As shown, a filter element 7 is installed in the middle of the inner cavity of the coal-water slurry gasifier 1. The filter element 7 has a filter diameter of 5μm and is cylindrical. An annular filter screen structure is installed on the outer side of the filter element 7. The middle part of the filter element 7 is a hollow channel. After the coal-water gas is filtered by the annular filter screen structure on the outer side, the filtered gas is discharged through the hollow channel and finally connected to the online analyzer through the coal-water gas outlet 8. A coal-water gas outlet 8 extending to the outside of the coal-water slurry gasifier 1 is installed at the bottom of the filter element 7.

[0022] Furthermore, we can also install a polymer gas-liquid separation membrane inside the filter element to prevent moisture from entering the analyzer.

[0023] like Figure 2 As shown, a reflux port is provided at the bottom of the coal-water slurry gasifier 1, and a filter screen 12 is provided at the reflux port. Multiple sets of spray pipes 11 are provided on the inner wall of the coal-water slurry gasifier 1. All sets of spray pipes 11 are connected to the reflux port through pipes 10, and a reflux pump is provided on the pipes 10.

[0024] To prevent filter element 7 from clogging, the water flowing into the bottom of gasifier 1 is drawn out by turning on the external reflux pump and sprayed out through the spray pipe 11 to act on filter element 7 and wash away the coal ash adsorbed on filter element 7.

[0025] Furthermore, an air pump or blower can be used instead of a return pump. By turning on the air pump or blower, the compressed cold air can be sprayed out through the spray pipe 11. This can reduce the internal temperature of the gasifier 1 and also wash away the impurities adsorbed on the filter element 7, achieving two goals at once.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0027] During use, water gas enters the water-coal slurry gasifier 1 through water gas inlet 3. The high-temperature water gas flows from bottom to top and comes into contact with the filter element 7. Cooling water enters the water-cooled jacket 4 through cooling water inlet 5, thereby cooling the water gas. After absorbing heat, the cooling water is discharged through cooling water outlet 6. Cooling water continuously flows in and out, carrying away heat.

[0028] After the water gas is filtered by filter element 7, the clean gas is connected to the analyzer through water gas outlet 8, while moisture and impurities are discharged through drain outlet 9.

[0029] In summary, the pretreatment filter of this online analyzer, by setting a water-cooled jacket around the gasifier and introducing flowing cooling water into the jacket, utilizes the high specific heat capacity of the cooling water to cool and lower the temperature of the water gas entering the gasifier (down to 50-55 degrees Celsius). Furthermore, by installing micron-sized filter elements and sprayers inside the gasifier, the filtration efficiency of the filter elements can be improved, separating moisture and coal ash impurities from the water gas. The gas is discharged through the water gas outlet, and the impurities are discharged through the drain outlet, thus making the gas entering the analyzer purer and greatly reducing damage to the analyzer.

[0030] It should be noted that all electrical components mentioned in this article are electrically connected to an external main controller and 220V or 380V AC mains power. The main controller can be a conventional, known device such as a computer, and its control principles, internal structure, and control switching methods are all conventional methods of existing technology. These are directly cited here without further elaboration. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pretreatment filter for an online analyzer, characterized in that: It includes a coal-water slurry gasifier (1), which has a flange (2) installed on its top and a coal-water slurry gasifier (1) with a coal-water gas inlet (3) and a drain outlet (9) respectively at its bottom. The side of the coal-water slurry gasifier (1) is covered with a water-cooled jacket (4), and the top and bottom of the water-cooled jacket (4) are respectively provided with a cooling water inlet (5) and a cooling water outlet (6). A filter element (7) is provided in the middle of the inner cavity of the coal-water slurry gasifier (1), and a water gas outlet (8) extending to the outside of the coal-water slurry gasifier (1) is installed at the bottom of the filter element (7).

2. The online analyzer pretreatment filter according to claim 1, characterized in that: The filter element (7) is cylindrical, with an annular filter screen structure on the outside and a hollow channel in the middle. After the water gas is filtered by the annular filter screen structure on the outside, the filtered gas is discharged through the hollow channel and finally connected to the online analyzer through the water gas outlet (8).

3. The online analyzer pretreatment filter according to claim 1, characterized in that: The bottom of the coal-water slurry gasifier (1) is provided with a reflux port, and a filter screen (12) is provided at the reflux port. The inner wall of the coal-water slurry gasifier (1) is provided with multiple sets of spray pipes (11), and the multiple sets of spray pipes (11) are all connected to the reflux port through pipes (10). A reflux pump is provided on the pipes (10).

4. The online analyzer pretreatment filter according to claim 2, characterized in that: The filter element (7) has a filter diameter of 4μm-6μm.

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