Denitration sampling probe filter element assembly of thermal power plant

Abstract

The utility model relates to the technical field of probe filter elements, in particular to a thermal power plant denitration sampling probe filter element assembly which comprises a filter element support, a connecting opening is formed in the left end of a connecting column in the filter element support, a left filter element frame sealing ring is fixedly arranged on the outer side of the left end of the connecting column, and a middle filter element frame sealing ring is fixedly arranged in the center of the connecting column. A right filter element frame sealing ring is fixedly arranged on the right side of the top end of the connecting column, the right side of the connecting column is connected with the left side of a connecting piece, a sleeving piece is arranged on the right side of the connecting piece, a filter element external thread connector is arranged on the left side of the sleeving piece, and a red copper sealing gasket is arranged in the center of the sleeving piece. A stainless steel outer hexagon is mounted on the right side of the sleeving piece, and a fixing mechanism is fixedly connected to the right side of the sleeving piece, so that the probability that dust enters the sampling channel is reduced, and the CEMS measurement accuracy and reliability are improved; the subsequent replacement can be carried out only by detaching the connecting ring and the metal sintered filter element, so that the efficiency is further improved and the replacement time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of probe filter elements, in particular to a denitration sampling probe filter element component for a thermal power plant. Background Art

[0002] At present, the filter element components of the flue gas online monitoring sampling probe are mostly filter elements installed at both ends. When installing the filter element, it is necessary to install fluororubber sealing rings at both ends of the filter element and then tighten them. This two-end sealing method can easily cause the sealing rings at both ends of the filter element to be subjected to uneven force, resulting in deformation and poor sealing, and dust entering the sampling channel and polluting the flue gas measurement system; since the flue gas temperature at the denitration CEMS sampling point of the thermal power plant is as high as about 320°C, the probe filter element sealing ring is often deformed in a short period of time, and smoke and dust will also enter the sampling channel, but the existing probe filter element bracket is sealed at both ends, and there are fluororubber sealing rings at both ends of the ceramic filter element, which are installed on the probe filter element top cover through a special mounting bracket. When the filter element is installed and fixed at both ends, it often happens that the filter element is subjected to uneven force at both ends and is not tightened in place, and the sealing is not strict, causing tiny dust particles to enter the collection channel. In addition, the normal working temperature limit of the fluororubber sealing rings at both ends of the filter element is about 240°C, and the flue gas temperature of the denitrification CEMS is as high as about 320°C. In actual use, the fluororubber will deform under high temperature conditions, resulting in sealing failure. Moreover, the metal sintered filter element needs to be completely disassembled before replacement, which is not only inefficient but also a waste of time. Therefore, it is urgent to design a denitrification sampling probe filter element assembly for thermal power plants to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a denitration sampling probe filter element assembly for a thermal power plant, so as to solve the problem that the filter element is fixed at both ends in the above background technology, and the filter element is often unevenly stressed and not properly tightened, resulting in poor sealing, which causes tiny dust particles to enter the collection channel. In addition, the upper limit of the normal working temperature of the fluororubber sealing rings at both ends of the filter element is about 240°C, and the flue gas temperature of the denitration CEMS is as high as about 320°C. In actual use, the fluororubber will deform under high temperature conditions, resulting in sealing failure, and the replacement of the metal sintered filter element requires complete disassembly before replacement, which is not only inefficient but also a waste of time.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a denitration sampling probe filter element assembly for a thermal power plant, comprising a filter element bracket, a connecting port is provided at the left end of a connecting column in the filter element bracket, a left filter element frame sealing ring is fixedly arranged on the outer side of the left end of the connecting column, a middle filter element frame sealing ring is fixedly arranged at the center of the connecting column, a right filter element frame sealing ring is fixedly arranged on the right side of the top end of the connecting column, the right side of the connecting column is connected to the left side of a connecting piece, a socket is provided on the right side of the connecting piece, a filter element external threaded joint is provided on the left side of the socket, a copper sealing gasket is provided at the center of the socket, a stainless steel hexagonal filter is installed on the right side of the socket, a connecting and fixing mechanism is fixedly arranged on the right side of the socket, the center of the left wall of a fixing plate in the fixing mechanism is connected to the right side of the stainless steel hexagonal filter, a fixing assembly is provided on the right outer wall of the fixing plate, and a metal sintered filter element is fixedly arranged at the center of the fixing assembly.

[0005] Preferably, an external back-blowing air inlet is provided at the right side of the left filter element holder sealing ring and at the left center of the middle filter element holder sealing ring.

[0006] Preferably, a sampling gas port is provided at the right side of the middle filter element holder sealing ring and the left center of the right filter element holder sealing ring, and an external hexagonal filter element mounting platform is fixedly provided at the right center of the connecting column.

[0007] Preferably, the left side of the mounting platform in the connecting piece is connected to the right side of the external hexagonal filter element mounting platform, an internal threaded hole is opened in the center of the mounting platform, and multiple groups of filter element external blowing holes are opened at the edge of the mounting platform, and the aperture of the filter element external blowing hole is mm in diameter.

[0008] Preferably, the left side of the external threaded joint of the filter element in the sleeve is threadedly connected to the internal threaded hole, and the left side of the copper sealing gasket is connected to the right edge of the mounting platform.

[0009] Preferably, the left side of the fixing ring in the fixing assembly is fixed to the right wall of the fixing plate, and the four sides of the right side of the fixing ring are fixedly installed with threaded sleeves, the central thread of the threaded sleeve is inserted into the bottom end of the limiting screw rod, and the bottom end of the limiting screw rod is inserted with an arc-shaped clamp, and the inner part of the arc-shaped clamp is clamped with the outer wall of the connecting ring.

[0010] Preferably, both sides of the center of the connecting ring are provided with inwardly concave circular grooves, a connecting hole is provided at the center of the inwardly concave circular groove, and the right side of the inwardly concave circular groove is threadedly connected to the left side of the metal sintered filter element.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The filter element assembly of the denitration sampling probe of a thermal power plant is changed to a single-end installation mode by setting a new probe filter element assembly, the ceramic filter element is changed to a metal sintered filter element with a single-end external thread interface, and the fluororubber sealing ring is changed to a copper sealing gasket. The single-end installation mode can avoid the sealing failure caused by uneven force at both ends. At the same time, the copper gasket is temperature-resistant to 1083°C, and the sealing failure caused by high temperature will not occur below 600°C. The maintenance cycle of the probe can be extended by more than 2 to 3 times, and the probability of dust entering the sampling channel is also reduced, thereby improving the accuracy and reliability of CEMS measurement.

[0013] The filter element assembly of the denitration sampling probe of a thermal power plant can limit the connection ring by setting a plurality of groups of threaded sleeves and limiting screw rods fixed in a fixing ring in a fixing mechanism, and is threadedly connected to a metal sintered filter element through the connection ring. Subsequent replacement only requires disassembling the connection ring and the metal sintered filter element to further improve efficiency and reduce replacement time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic side view of the utility model;

[0015] Figure 2 This is a side view schematic diagram of the filter element bracket of the utility model;

[0016] Figure 3 This is a schematic diagram of the fixing mechanism and metal sintered filter structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the fixing mechanism structure of the utility model.

[0018] In the figure: 1. Filter element bracket; 101. Connecting column; 102. Connecting port; 103. Left filter element holder sealing ring; 104. External back-blowing air inlet; 105. Middle filter element holder sealing ring; 106. Sampling gas port; 107. Right filter element holder sealing ring; 108. External hexagonal filter element mounting platform; 2. Connecting piece; 201. Mounting platform; 202. Internal threaded hole; 203. External blowing hole of filter element; 3. Connecting piece; 301. External threaded joint of filter element; 302. Copper sealing gasket; 303. External hexagonal stainless steel; 4. Fixing mechanism; 401. Fixing plate; 402. Fixing assembly; 4021. Fixing ring; 4022. Threaded sleeve; 4023. Limiting screw; 4024. Arc clamp; 4025. Connecting ring; 4026. Inner concave groove; 4027. Connecting hole; 5. Metal sintered filter element. DETAILED DESCRIPTION

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

[0020] See also Figure 1-4 , an embodiment provided by the utility model:

[0021] A denitration sampling probe filter element assembly for a thermal power plant comprises a filter element bracket 1, characterized in that: a connecting port 102 is provided at the left end of a connecting column 101 in the filter element bracket 1, a left filter element frame sealing ring 103 is fixedly arranged on the outer side of the left end of the connecting column 101, a middle filter element frame sealing ring 105 is fixedly arranged at the center of the connecting column 101, a right filter element frame sealing ring 107 is fixedly arranged on the right side of the top of the connecting column 101, the right side of the connecting column 101 is connected to the left side of a connecting member 2, a sleeve 3 is provided on the right side of the connecting member 2, a filter element external thread joint 301 is provided on the left side of the sleeve 3, a copper sealing gasket 302 is provided at the center of the sleeve 3, a stainless steel outer hexagon 303 is installed on the right side of the sleeve 3, a connecting fixing mechanism 4 is fixedly arranged on the right side of the sleeve 3, a left wall center of a fixing plate 401 in the fixing mechanism 4 is connected to the right side of the stainless steel outer hexagon 303, a fixing assembly 402 is provided on the right outer wall of the fixing plate 401, and a metal sintered filter element 5 is fixedly arranged at the center of the fixing assembly 402.

[0022] Furthermore, an external back-blowing air inlet 104 is provided at the right side of the left filter element frame sealing ring 103 and the left center of the middle filter element frame sealing ring 105, a sampling gas port 106 is provided at the right side of the middle filter element frame sealing ring 105 and the left center of the right filter element frame sealing ring 107, and an external hexagonal filter element mounting platform 108 is fixedly provided at the right center of the connecting column 101, which can avoid sealing failure caused by uneven installation force at both ends.

[0023] As a further feature of the utility model, the left side of the mounting platform 201 in the connector 2 is connected to the right side of the external hexagonal filter element mounting platform 108, an internal threaded hole 202 is provided at the center of the mounting platform 201, and a plurality of groups of filter element external blowing holes 203 are provided at the edge of the mounting platform 201, and the aperture of the filter element external blowing holes 203 is 3 mm in diameter, thereby improving the heat dissipation stability.

[0024] Furthermore, the left side of the filter element external threaded joint 301 in the socket 3 is threadedly connected to the internal threaded hole 202, and the left side of the copper sealing gasket 302 is connected to the right edge of the mounting platform 201. The copper gasket is temperature-resistant to 1083°C, and the sealing failure due to high temperature will not occur below 600°C.

[0025] As a further feature of the present invention, the left side of the fixing ring 4021 in the fixing assembly 402 is fixed to the right wall of the fixing plate 401, and the four sides of the right side of the fixing ring 4021 are fixedly installed with threaded sleeves 4022, the central thread of the threaded sleeve 4022 is inserted into the bottom end of a limiting screw rod 4023, and the bottom end of the limiting screw rod 4023 is inserted with an arc-shaped clamping plate 4024, and the inner part of the arc-shaped clamping plate 4024 is clamped with the outer wall of the connecting ring 4025, which is convenient for replacing and installing the metal sintered filter element.

[0026] Furthermore, concave circular grooves 4026 are provided on both sides of the center of the connecting ring 4025, a connecting hole 4027 is provided in the center of the concave circular groove 4026, and the right side of the concave circular groove 4026 is threadedly connected to the left side of the metal sintered filter element 5, thereby improving efficiency and reducing replacement time.

[0027] Working principle: When in use, the user first connects the left side thread of the metal sintered filter element 5 to the right side of the connecting ring 4025, and then extends the left side of the connecting ring 4025 to the inside of the fixing ring 4021, and then rotates the limiting screw rod 4023 at the top of the four sides to rotate. The rotation of the limiting screw rod 4023 can drive the arc clamping plate 4024 at the bottom to be fixed on the outer wall of the connecting ring 4025, and then the left side of the filter element external threaded joint 301 in the left side sleeve 3 of the fixing ring 4021 is threadedly connected with the internal threaded hole 202 on the right side of the installation platform 201. Then, the wrench can be used to clamp the outer side of the stainless steel hexagonal 303 to rotate and then tighten it and then fix it on the filter element bracket 1. The copper sealing gasket 302 has stable performance in high-temperature flue gas, avoiding the problem of deformation and sealing failure of fluororubber in high-temperature environment. This is the entire working principle of the present utility model.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A denitration sampling probe filter element assembly for a thermal power plant, comprising a filter element bracket (1), characterized in that: The left end of the connecting column (101) in the filter element support (1) is provided with a connecting port (102), the left end of the connecting column (101) is fixedly provided with a left filter element support sealing ring (103), the center of the connecting column (101) is fixedly provided with a middle filter element support sealing ring (105), the top right side of the connecting column (101) is fixedly provided with a right filter element support sealing ring (107), the right side of the connecting column (101) is connected to the left side of the connecting piece (2), the right side of the connecting piece (2) is provided with a sleeve connector (3), the left side of the sleeve connector (3) is provided with a A filter element external threaded joint (301) is provided, a copper sealing gasket (302) is provided at the center of the sleeve (3), a stainless steel external hexagon (303) is installed on the right side of the sleeve (3), a connecting fixing mechanism (4) is fixedly provided on the right side of the sleeve (3), the center of the left wall of a fixing plate (401) in the fixing mechanism (4) is connected to the right side of the stainless steel external hexagon (303), a fixing assembly (402) is provided on the right outer wall of the fixing plate (401), and a metal sintered filter element (5) is fixedly provided at the center of the fixing assembly (402).

2. A denitration sampling probe filter element assembly for a thermal power plant according to claim 1, characterized in that: An external back-blowing air inlet (104) is provided at the right side of the left filter element frame sealing ring (103) and at the center of the left side of the middle filter element frame sealing ring (105).

3. A denitration sampling probe filter element assembly for a thermal power plant according to claim 1, characterized in that: A sampling gas opening (106) is provided at the right side of the middle filter holder sealing ring (105) and at the left center of the right filter holder sealing ring (107), and an external hexagonal filter mounting platform (108) is fixedly provided at the right center of the connecting column (101).

4. A denitration sampling probe filter element assembly for a thermal power plant according to claim 1, characterized in that: The left side of the mounting platform (201) in the connecting member (2) is connected to the right side of the external hexagonal filter element mounting platform (108), an internal threaded hole (202) is provided at the center of the mounting platform (201), and a plurality of groups of filter element external blowing holes (203) are provided at the edge of the mounting platform (201), and the aperture of the filter element external blowing holes (203) is 3 mm in diameter.

5. The denitration sampling probe filter element assembly for a thermal power plant according to claim 1, characterized in that: The left side of the filter element external threaded joint (301) in the sleeve connector (3) is threadedly connected to the internal threaded hole (202), and the left side of the copper sealing gasket (302) is connected to the right edge of the mounting platform (201).

6. A denitration sampling probe filter element assembly for a thermal power plant according to claim 1, characterized in that: The left side of the fixing ring (4021) in the fixing assembly (402) is fixed to the right wall of the fixing plate (401), and the four sides of the right side of the fixing ring (4021) are fixedly installed with threaded sleeves (4022), the central thread of the threaded sleeve (4022) is inserted into the bottom end of the limiting screw rod (4023), and the bottom end of the limiting screw rod (4023) is inserted with an arc-shaped clamping plate (4024), and the inner part of the arc-shaped clamping plate (4024) is clamped with the outer wall of the connecting ring (4025).

7. A denitration sampling probe filter element assembly for a thermal power plant according to claim 6, characterized in that: The connecting ring (4025) is provided with concave circular grooves (4026) on both sides of the center, a connecting hole (4027) is provided at the center of the concave circular groove (4026), and the right side of the concave circular groove (4026) is threadedly connected to the left side of the metal sintered filter element (5).

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