Valve cover of converter dry dedusting explosion venting valve

Abstract

The invention relates to a valve cover of a converter dry dedusting explosion venting valve. The valve cover comprises a cover body, a first spring set, a second spring set and a third spring set. Each of the first spring group, the second spring group and the third spring group comprises a plurality of springs; the cover body is supported by a plurality of sliding rods, and the cover body can slide along the sliding rods; one ends of the first spring group, the second spring group and the third spring group all face the cover body, and the other ends are fixed with the sliding rod; the cover body is connected with a distance sensor. According to the valve cover of the converter dry dedusting explosion venting valve, the explosion venting strength can be accurately judged when explosion venting happens to an electrostatic dust collector, powerful data support is provided for later equipment improvement and optimization and technological operation adjustment through accurate explosion venting strength data, and therefore the purpose of reducing the explosion venting frequency of the electrostatic dust collector is achieved.

Description

Technical Field

[0001] The invention relates to a valve cover of a converter dry dust removal and explosion relief valve, belonging to the technical field of dust removal. Background Art

[0002] Converter dry dust removal is a new dust removal process developed in recent years. The process flow is: after the flue gas enters the vaporization cooling flue for indirect cooling, it is directly cooled by the evaporative cooler - spraying atomized water into the flue gas passing through the evaporative cooler. The amount of water sprayed should be accurately determined by the thermal enthalpy of the hot air flow generated during the steelmaking production process. After the flue gas is cooled to 150℃ to 200℃, it is introduced into the electrostatic precipitator through the gas pipeline for fine dust removal. Then it enters the gas switching station through the induced draft equipment - axial flow blower. Qualified gas enters the recovery system after further cooling, and unqualified gas is ignited and released through the release tower.

[0003] The air, waste gas and converter gas generated during converter smelting flow alternately through the electrostatic precipitator and the entire cooling and purification system. If these gases of different components are mixed before entering the electrostatic precipitator or in the electrostatic precipitator, it is very easy to explode in the electrostatic precipitator. Serious explosion-proof accidents can cause serious deformation of the internal plates of the electrostatic precipitator and reduce the sensitivity of the safety valve. At the same time, the converter automatically lifts the gun, affecting the smooth progress of production. Frequent explosion-proofing affects the life of the internal components of the electrostatic precipitator and the dust removal effect. In order to ensure the safe operation of the electrostatic precipitator, 4 safety explosion-proof valves are set at the inlet and outlet positions of the electrostatic precipitator, and each explosion-proof valve has 3 limiters to determine the closing status of the explosion-proof valve. At present, the explosion-proofing of the converter dry dust removal at home and abroad is only detected by limiters. The limiters are installed in the electrostatic precipitator to determine whether the explosion is vented. The explosion-proofing intensity level cannot be detected. Due to the impact on production and safety after the explosion-proofing, it must be checked and analyzed and improved after the explosion-proofing. Without accurate explosion-proofing intensity data, it is difficult to analyze the explosion-proofing process and causes. Therefore, if the difficulty of explosion relief intensity detection can be solved, it will be of great significance to reduce the number of explosion relief times of electrostatic precipitators and improve the internal components and dust removal effect of electrostatic precipitators. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the disadvantages of the above-mentioned technology and to provide a valve cover of an explosion relief valve which can accurately judge the explosion relief intensity level when explosion relief occurs in an electrostatic precipitator.

[0005] In order to solve the above technical problems, the technical solution proposed in the present invention is: a valve cover of a converter dry dust removal and explosion relief valve, comprising: a cover body, a first spring group, a second spring group and a third spring group; the first spring group, the second spring group and the third spring group each include a plurality of springs; the cover body is supported by a plurality of sliding rods, and the cover body can slide along the sliding rods; one end of the first spring group, the second spring group and the third spring group are all facing the cover body, and the other end is fixed to the sliding rod; the first spring group is pre-compressed, and one end of the first spring group contacts the cover body; one end of the second spring group and the third spring group are both spaced from the cover body, and the space between the second spring group and the cover body is smaller than the space between the third spring group and the cover body; when the cover body moves toward the first spring group, the second spring group and the third spring group along the sliding rod, it can contact one end of the second spring group and the third spring group in turn, and compress the second spring group and the third spring group; a distance sensor is connected to the cover body, which can measure the moving distance of the cover body.

[0006] A further improvement of the above solution is that: the first spring group includes 4 springs arranged in a circular shape.

[0007] A further improvement of the above solution is that the second spring group includes 8 springs arranged in a circular shape.

[0008] A further improvement of the above solution is that the second spring group includes 4 springs arranged in a circular shape.

[0009] A further improvement of the above solution is that the sliding rods are arranged in a circular shape.

[0010] A further improvement of the above scheme is that each spring of the first spring group, the second spring group and the third spring is sleeved with a sleeve.

[0011] The valve cover of the converter dry dust removal explosion relief valve provided by the present invention can accurately judge the explosion relief strength when the electrostatic precipitator explodes, and use the accurate explosion relief strength data to provide strong data support for the subsequent equipment improvement and optimization and process operation adjustment, thereby achieving the purpose of reducing the number of explosion relief of the electrostatic precipitator. It is of great significance to reduce the number of explosion relief of the electrostatic precipitator and improve the internal components and dust removal effect of the electrostatic precipitator. It fills the gap in the detection and judgment of the explosion relief strength of the electrostatic precipitator in the current industry, has a wide range of applications, and has a good development prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present invention.

[0013] Figure 2 for Figure 1 Schematic diagram of the side structure. Implementation

[0014] The valve cover of the converter dry dust removal explosion relief valve of this embodiment is as follows Figure 1 and Figure 2 As shown, it comprises: a cover body 1, a first spring group, a second spring group and a third spring group. The cover body 1 is supported by 7 slide bars d, and the cover body 1 can slide along the slide bars.

[0015] The first spring group includes 4 springs a; the second spring group includes 8 springs b; and the third spring group includes 4 springs c. All springs are protected by sleeves to prevent the springs from lateral movement.

[0016] One end of all springs faces the cover 1, and the other end is fixed to the slide bar 1 through the fixing frame 2. The fixing frame 2 is annular, so that the first spring group, the second spring group and the third spring group are arranged on the circumference of the cover 1, and the first spring group, the second spring group and the third spring group are arranged evenly. The slide bar d is also arranged in a circumference and evenly.

[0017] The spring of the first spring group is pre-compressed, and one end thereof contacts the cover body 1; one end of the springs of the second spring group and the third spring group are both spaced from the cover body 1, and the space between the second spring group and the cover body 1 is smaller than the space between the third spring group and the cover body 1; a distance sensor is connected to the cover body 1 to measure the moving distance of the cover body 1. The distance sensor outputs its measurement data to the server for calculation of the explosion relief strength.

[0018] The side of the cover body 1 facing away from the spring is the working surface, and a fixed base 3 is provided on the surface for connecting with the explosion relief valve.

[0019] An intelligent pressure transmitter is installed at the end of each sampling valve of all 8 backflush systems in the factory. The 8 intelligent pressure transmitters are responsible for uninterrupted monitoring of the internal pressure of the electrostatic precipitator during converter smelting, and transmit the detection implementation values ​​to the converter server, which saves the historical detection values.

[0020] In this embodiment, the first spring group has a pre-compression stroke, which can provide a basic reset function for the cover body 1. The pre-compression stroke is also the judgment threshold of the explosion relief strength, that is, the explosion relief exceeding this strength can be detected. When calculating the explosion relief strength, the intervals between the three spring groups need to be considered. That is, assuming that in the initial state, the pre-compression stroke of the first spring group is L, the distance between the second spring group and the cover body 1 is Lb, and the distance between the third spring group and the cover body 1 is Lc, then as the cover body 1 moves toward the spring, when the distance reaches Lb but not Lc, the pressure is calculated, and the force of the second spring group needs to be increased. When the cover body 1 moves toward the spring, when the distance reaches Lc, the force of the third spring group needs to be increased.

[0021] The calculation formula is as follows: F=P*S; F=K*LX ; From this we get: P = K * L X / S; where P is the explosion relief strength; K is the spring compression modulus; L X is the spring compression stroke; S is the explosion-proof valve cover area. In this embodiment, all springs are of the same model, so the K value is unified for easy calculation. X The spring compression stroke includes all spring groups that are currently compressed.

[0022] Furthermore, in order to facilitate calculation and classification, the present embodiment is set as follows: the pre-compression stroke of the first spring group is 75 mm, the distance between the second spring group and the cover body 1 is 75 mm, and the distance between the third spring group and the cover body 1 is 150 mm. In this way, when the first spring group is compressed by the cover body 1 by another 75 mm, that is, it contacts the second spring group, and the explosion relief strength at this time is set to P1; when it is further compressed by 75 mm, that is, it contacts the third spring group, and the explosion relief strength at this time is set to P2. Thus, the explosion relief strength is divided into three levels.

[0023] According to the explosion relief pressure data collected by the server, the actual trend of electrostatic precipitator pressure detection is added to the first-level screen of the steelmaking process. The pressure values ​​inside the 8 sets of explosion relief valves of the electrostatic precipitator can be intuitively seen on the trend chart. When the electrostatic precipitator is vented, the pressure transmitter is subjected to the great impact force generated by the explosion inside the electrostatic precipitator, and the pressure will increase rapidly. Thus, the detection and judgment of the analog data value of the dry dust removal explosion relief intensity is obtained. When the pressure transmitter detection value PT is P1≥PT≥0, it is judged as the first-level explosion relief; when the pressure transmitter detection value is P2≥PT>P1, it is judged as the second-level explosion relief; when the pressure transmitter detection value P2<PT, it is judged as the third-level explosion relief.

[0024] At this point, the explosion relief intensity can be displayed intuitively on the graphical interface.

[0025] The present invention is not limited to the above embodiments. Any technical solution formed by equivalent replacement falls within the protection scope required by the present invention.

Claims

1. A valve cover for a converter dry dust removal and explosion relief valve, characterized in that: include: A cover body, a first spring group, a second spring group and a third spring group; the first spring group, the second spring group and the third spring group each include a plurality of springs; the cover body is supported by a plurality of sliding rods, and the cover body can slide along the sliding rods; one end of the first spring group, the second spring group and the third spring group are all facing the cover body, and the other end is fixed to the sliding rod; the first spring group is pre-compressed, and one end of the first spring group contacts the cover body; one end of the second spring group and the third spring group are both spaced from the cover body, and the space between the second spring group and the cover body is smaller than the space between the third spring group and the cover body; when the cover body moves along the sliding rod toward the first spring group, the second spring group and the third spring group, it can contact one end of the second spring group and the third spring group in turn, and compress the second spring group and the third spring group; a distance sensor is connected to the cover body, which can measure the moving distance of the cover body.

2. The valve cover of the converter dry dust removal and explosion relief valve according to claim 1 is characterized in that: The first spring group includes four springs arranged in a circular shape.

3. The valve cover of the converter dry dust removal and explosion relief valve according to claim 1 is characterized in that: The second spring group includes 8 springs arranged in a circular shape.

4. The valve cover of the converter dry dust removal and explosion relief valve according to claim 1 is characterized in that: The second spring group includes four springs arranged in a circular shape.

5. The valve cover of the converter dry dust removal and explosion relief valve according to claim 1 is characterized in that: The slide bars are arranged in a circular shape.

6. The valve cover of the converter dry dust removal and explosion relief valve according to claim 1 is characterized in that: Each spring of the first spring group, the second spring group and the third spring is sleeved with a sleeve.

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