Anti-corrosion structure for RTO furnace lift valve

Abstract

The utility model provides an anti-corrosion structure for a lift valve of an RTO furnace. The anti-corrosion structure aims at solving the problems that in the prior art, a valve is corroded, condensate water is accumulated, and a valve seat is difficult to replace. The structure comprises a bottom bin, a top bin, an air cylinder, a lifting rod, a valve element, a sealing ring and other key components, all the main components are made of high-temperature-resistant and corrosion-resistant materials, and the stability and durability of a valve system in the high-temperature and corrosive environment are guaranteed; by arranging the communicating pipe, condensate water can be effectively guided to flow into the bottom bin, and the corrosion problem caused by condensate water accumulation is avoided; meanwhile, the replacement process of the valve seat is simple and convenient, an operator can easily complete replacement of the valve seat through an access door arranged on the bottom bin, and the maintenance time and cost are reduced; in addition, a reinforcing plate is arranged in the sealing ring, the pressure resistance of the sealing ring is enhanced, and the overall sealing performance and reliability of the valve are improved. The working efficiency of the RTO furnace lifting valve is effectively improved, the service life of equipment is prolonged, and the maintenance and operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the combustion waste gas treatment technical field, concretely relates to a kind of for RTO furnace poppet valve anticorrosion structure. BACKGROUND

[0002] RTO furnace (Regenerative Thermal Oxidizer) is a kind of equipment widely used in industrial waste gas treatment, mainly used for waste gas incineration and processing under high temperature environment, to reduce the harmful substance emission in waste gas, reach environmental protection standard.However, RTO furnace is in long time operation, often faces the corrosion problem of valve and related equipment due to corrosive component in waste gas, especially in high temperature and high humidity environment, the service life and stability of valve are often influenced.Therefore, poppet valve anticorrosion structure becomes one of the key problems to ensure the stable operation of RTO furnace.

[0003] At present, the valve of traditional RTO furnace generally adopts the mode of fixed valve seat and valve core combination in structural design, although it can meet the basic switching function, but due to the valve under the action of high temperature, corrosive gas and condensed water for a long time, valve seat is easily corroded, leading to the decline of sealing performance, influence the normal work of valve.Especially when valve seat needs to be frequently replaced, due to the complex dismounting process, maintenance cost is higher, increase the maintenance difficulty and economic burden of equipment.

[0004] Therefore, there are still some technical problems in the prior art in solving the corrosion problem of RTO furnace valve and improving the convenience of valve seat replacement.Specifically, the existing valve cannot effectively prevent the accumulation and corrosion of condensed water in design, at the same time, the replacement process of valve seat is still cumbersome, needs longer downtime and high maintenance cost.In addition, the existing poppet valve structure often cannot meet the unified requirements of corrosion resistance, sealing performance and operation convenience. UTILITY MODEL CONTENTS

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a kind of for RTO furnace poppet valve anticorrosion structure, it can realize, can effectively avoid the accumulation of condensed water, simultaneously simplify the operation of valve seat replacement, improve the corrosion resistance of valve, prolong its service life, reduce maintenance difficulty and cost.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A kind of for RTO furnace poppet valve anticorrosion structure, including bottom warehouse, the top of bottom warehouse is connected with top warehouse;

[0008] The bottom of bottom warehouse is provided with input pipe, and the two sides of top warehouse are provided with output pipe;

[0009] The isolation plate is connected between the bottom chamber and the top chamber;

[0010] A cylinder is connected to the top of the top chamber, the telescopic end of the cylinder is connected to a lifting rod, the bottom of the lifting rod is connected to a valve core, and the valve core is located in the space between the isolation plate and the bottom chamber;

[0011] A communication pipe is arranged at the center of the isolation plate;

[0012] When the valve core is in contact with the bottom of the communication pipe, the valve is in a closed state, and when the valve core is separated from the bottom of the communication pipe, the valve is in an open state.

[0013] Further, the valve core comprises a valve seat sleeved on the lifting rod and a sealing ring, and the sealing ring is fixed on the valve seat through bolts;

[0014] A first connecting hole is arranged on the upper end surface of the valve seat around the central axis at equal intervals, and a second connecting hole corresponding to the first connecting hole is arranged on the upper end surface of the sealing ring.

[0015] Further, the sealing ring is fixedly connected with a reinforcing plate inside.

[0016] Further, a maintenance door is arranged on one side of the bottom chamber, and handles are symmetrically arranged on the outer side of the maintenance door.

[0017] Further, a base is fixedly connected to the top of the top chamber, and the cylinder is installed on the base.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] Firstly, the traditional RTO furnace valve is easy to be corroded under the action of high temperature, corrosive gas and condensed water, which leads to the decline of the sealing performance of the valve and the shortening of the service life.

[0020] Secondly, in the prior art, the condensed water of the RTO furnace valve often accumulates in the bottom chamber and the top chamber, forming a corrosion source and affecting the normal operation of the valve.

[0021] In addition, the valve seat replacement process of the present application is simple. In the prior art, valve seat replacement usually takes a long time and complicated operation, increasing maintenance cost and downtime. The present application sets an access door in the bottom bin, and through simple structure design, the valve seat replacement operation becomes easier, and the operator only needs to open the access door to replace quickly, greatly simplifying the maintenance process and reducing the labor intensity during maintenance.

[0022] In addition, the present application innovates the design of the valve core, adopts the structure of the valve seat and the sealing ring sleeved on the lifting rod, which not only ensures the sealing performance of the valve, but also enhances the stability of the valve in high temperature and high pressure environment. The reinforcing plate is arranged in the sealing ring, which further enhances the pressure resistance of the sealing ring, prevents the sealing ring from deforming or damaging due to high pressure during long-term use. This improvement effectively improves the overall performance of the valve and reduces the risk of downtime caused by valve seat damage. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the present application;

[0024] Figure 2 is a structural schematic view of the internal structure of the present application;

[0025] Figure 3 is a structural schematic view of the valve core of the present application;

[0026] Figure 4 is Figure 3 is an enlarged schematic view of position A in figure 6;

[0027] Figure 5 is a structural schematic view of the valve seat of the present application;

[0028] Figure 6 is a structural schematic view of the sealing ring of the present application.

[0029] In the drawings, the components represented by each reference numeral are listed as follows:

[0030] 1, bottom bin; 11, input pipe;

[0031] 2, top bin; 21, output pipe; 22, base;

[0032] 3, cylinder; 31, lifting rod;

[0033] 4, access door; 41, handle;

[0034] 5, valve core;

[0035] 51, valve seat; 511, first connecting hole; 52, sealing ring; 521, second connecting hole; 522, reinforcing plate;

[0036] 6, Isolation plate; 61, Connecting pipe. DETAILED DESCRIPTION

[0037] In order to make the purpose and advantages of the utility model more clear and apparent, the utility model is specifically described below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model and does not strictly limit the protection scope specifically requested by the utility model.

[0038] Reference Figures 1-6 A kind of for RTO furnace poppet valve anticorrosion structure, including bottom warehouse 1, the top of bottom warehouse 1 is connected with top warehouse 2;

[0039] In the structure, bottom warehouse 1 is the basic part of entire valve system, and its main function is to accommodate waste gas inflow and form preliminary cooling space. Bottom warehouse 1 is usually made of high-temperature-resistant and corrosion-resistant materials, such as carbon steel or stainless steel (SS304 or SS316 material is recommended), to ensure sufficient strength and corrosion resistance in high-temperature and high-humidity environment. Top warehouse 2 is connected with bottom warehouse 1 through the top connection, forming the upstream part of the waste gas flow. The design of top warehouse 2 considers the guidance of waste gas and the discharge of condensed water, to ensure that the system is not blocked or corroded when waste gas flows through.

[0040] The bottom of bottom warehouse 1 is provided with an input pipe 11, and the two sides of top warehouse 2 are provided with output pipes 21.

[0041] The input pipe 11 is usually made of materials with good corrosion resistance, such as coated steel pipe or stainless steel pipe, connected to the bottom of bottom warehouse 1, mainly responsible for introducing waste gas into bottom warehouse 1; the output pipes 21 are arranged on the two sides of top warehouse 2, respectively, responsible for discharging treated waste gas. The layout design of input pipe 11 and output pipe 21 can be optimized according to the specific working conditions of RTO furnace to ensure the balance of waste gas flow and discharge efficiency.

[0042] An isolation plate 6 is connected between bottom warehouse 1 and top warehouse 2.

[0043] The isolation plate 6 is arranged between bottom warehouse 1 and top warehouse 2, which separates the cold gas and waste gas, avoids unnecessary mixing during the waste gas flow, and thus affects the treatment effect. The isolation plate 6 can be made of high-temperature-resistant and corrosion-resistant materials, such as ceramic-coated steel plate or stainless steel plate, and the thickness can be selected according to the specific use conditions, usually between 5mm and 10mm, to ensure its stability and strength under high temperature and high pressure.

[0044] The top of top warehouse 2 is connected with a cylinder 3, the telescopic end of cylinder 3 is connected with a lifting rod 31, the bottom of lifting rod 31 is connected with a valve core 5, and the valve core 5 is located in the space between isolation plate 6 and bottom warehouse 1.

[0045] The cylinder 3, as a driving device, is installed at the top of the top chamber 2 and drives the lifting rod 31 to move up and down through the telescopic action to control the opening and closing state of the valve core 5. The model of the cylinder 3 can be selected as a high-temperature cylinder that meets the requirements of the working environment of the RTO furnace, such as a cylinder with high-temperature-resistant rubber seals, to ensure stable operation in a high-temperature and corrosive gas environment. The lifting rod 31 is usually made of high-strength alloy steel material, and its size and design should ensure that it can withstand a large load and maintain sufficient oxidation resistance in a high-temperature and corrosive environment.

[0046] The valve core 5 is fixedly connected with the lifting rod 31, and the valve core 5 is located in the space between the isolation plate 6 and the bottom chamber 1. The design of the valve core 5 needs to accurately match the size and shape of the valve seat 51 to ensure the sealing performance of the valve. The valve core 5 usually uses alloy materials with excellent corrosion resistance, such as cast iron or corrosion-resistant stainless steel, which are precisely machined to ensure that the contact surface with the valve seat 51 is smooth and flat.

[0047] The isolation plate 6 is provided with a communication pipe 61 at the center thereof;

[0048] The communication pipe 61 is arranged at the center of the isolation plate 6 and is used to drain the condensed water in the bottom chamber 1 and the top chamber 2 when the valve is in the closed state. The communication pipe 61 is made of materials resistant to high temperature and corrosion, such as stainless steel or composite materials, to ensure that it will not be damaged in a high-temperature and chemical corrosion environment. The inner diameter of the communication pipe 61 is usually designed according to the flow of air and condensed water, and the common diameter is 50mm to 100mm, which ensures that the condensed water can flow smoothly and be effectively discharged.

[0049] When the valve core 5 is in contact with the bottom of the communication pipe 61, the valve is in the closed state, and when the valve core 5 is separated from the bottom of the communication pipe 61, the valve is in the open state.

[0050] When the telescopic action of the cylinder 3 drives the lifting rod 31 to move up or down, the valve core 5 will be separated from the bottom of the communication pipe 61, and the valve will enter the open state. The flue gas enters the bottom chamber 1 through the input pipe 11 and flows to the top chamber 2, and is discharged through the output pipe 21. When the valve core 5 is in contact with the bottom of the communication pipe 61, the valve is in the closed state, and the condensed water cannot flow through the communication pipe, ensuring the sealing and stability of the system. The contact part of the valve core 5 and the communication pipe 61 and the sealing ring 52 need to be precisely machined to ensure complete sealing and prevent any leakage.

[0051] Referring to Figures 3-6 , the valve core 5 includes a valve seat 51 and a sealing ring 52, and the sealing ring 52 is fixed on the valve seat 51 by bolts;

[0052] The valve seat 51 of the valve core 5 is used in cooperation with the sealing ring 52, and a plurality of connecting holes 511 are designed on the valve seat 51 for precise butt joint with the connecting holes 521 of the sealing ring 52, to ensure the sealing performance of the valve in the closed state. The valve seat 51 is made of high-strength alloy steel, and its surface may be subjected to corrosion-resistant treatment such as chrome plating or high-temperature-resistant coating to enhance its durability in high-temperature and high-corrosion environments. The sealing ring 52 is made of materials with good elasticity and corrosion resistance, such as PTFE (polytetrafluoroethylene) or graphite material, which has good sealing performance and can effectively prevent smoke leakage.

[0053] The upper end surface of the valve seat 51 is provided with first connecting holes 511 at equal intervals around the central axis; the upper end surface of the sealing ring 52 is provided with second connecting holes 521 corresponding to the first connecting holes 511.

[0054] The precise cooperation of the valve seat 51 and the sealing ring 52 is very important, and the first connecting holes 511 and the second connecting holes 521 need to be butt jointed by precise machining to ensure the firmness and sealing performance of the connection. The number and distribution of the connecting holes need to be designed according to actual needs, and they are usually distributed in an equal interval manner to ensure that the sealing ring 52 can always maintain close contact during valve operation.

[0055] Referring to Figure 6 , the sealing ring 52 is fixedly connected with a reinforcing plate 522 inside.

[0056] The sealing ring 52 is provided with a reinforcing plate 522 inside, which is used to enhance the mechanical strength and pressure resistance of the sealing ring, preventing it from deforming or breaking during long-term use. The reinforcing plate 522 is usually made of stainless steel or alloy material and is specially treated to improve its high-temperature resistance and corrosion resistance. The size and shape of the reinforcing plate 522 need to match the internal structure of the sealing ring 52 to ensure that the reinforcing plate can effectively distribute stress and improve the stability of the overall structure.

[0057] Referring to Figure 1 , the bottom bin 1 is provided with an access door 4 on one side, and the outer side of the access door 4 is symmetrically provided with handles 41.

[0058] The access door 4 provides a passage for easy maintenance and replacement of the valve seat 51 and other components. The access door 4 is usually made of high-temperature-resistant steel plate of the same material as the bottom bin 1 and is provided with a corrosion-resistant coating to avoid corrosion problems in high-temperature environments. The handles 41 are symmetrically arranged to ensure that maintenance personnel can easily operate the access door when checking the valve, reducing maintenance time and cost.

[0059] Referring to Figure 1 , the top bin 2 is fixedly connected with a base 22 at the top, and the air cylinder 3 is installed on the base 22.

[0060] The base 22 is used as a support platform of the cylinder 3, is made of high-strength steel material, and can bear the load generated by the cylinder during work. The base 22 is fixedly connected to the top of the top bin 2, and the stability of the connection is ensured by a precise welding process. When the cylinder 3 is installed on the base 22, the installation angle and position of the cylinder need to be ensured to be accurate, so that the lifting rod 31 can smoothly drive the valve core 5 to open or close.

[0061] The working principle of the utility model is as follows:

[0062] When the cylinder 3 controls the valve core 5 to move through the lifting rod 31, and the valve seat 51 is separated from the bottom of the communication pipe 61, the valve is in an open state at this time, flue gas enters the space in the bottom bin 1 and the top bin 2 through the input pipe 11, and is discharged through the output pipe 21;

[0063] In this process, the condensed water produced in the top bin 2 will flow into the bottom bin 1 through the communication pipe 61 and flow into the input pipe 11, so that the condensed water in the bottom bin 1 and the top bin 2 can be avoided to accumulate;

[0064] When it is necessary to replace the valve seat 51, only the maintenance door 4 needs to be opened, so that the operation steps of replacing the valve seat 51 can be simplified.

[0065] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements should also be regarded as the protection range of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to conventional means in the field without special description and limitation.

Claims

1. A corrosion-resistant structure for a lift valve of an RTO furnace, characterized in that: The bottom bin (1) is connected with the top bin (2) at the top thereof; The bottom bin (1) is provided with an input pipe (11) at the bottom thereof, and the top bin (2) is provided with an output pipe (21) at each side thereof; The bottom bin (1) and the top bin (2) are connected with a partition plate (6) therebetween; The top bin (2) is connected with a cylinder (3) at the top thereof, the cylinder (3) is connected with a lifting rod (31) at the telescopic end thereof, the bottom of the lifting rod (31) is connected with a valve core (5), and the valve core (5) is located in the space between the partition plate (6) and the bottom bin (1); The partition plate (6) is provided with a communication pipe (61) at the center thereof; When the valve core (5) is separated from the bottom of the communication pipe (61), the valve is in the open state.

2. A corrosion-proof structure for a lift valve of an RTO furnace according to claim 1, characterized in that: The valve core (5) comprises a valve seat (51) and a sealing ring (52), the sealing ring (52) is fixed on the valve seat (51) by bolts; The upper end surface of the valve seat (51) is provided with first connecting holes (511) at equal intervals around the central axis thereof; the upper end surface of the sealing ring (52) is provided with second connecting holes (521) corresponding to the first connecting holes (511).

3. The structure for preventing corrosion of a lift valve of an RTO furnace according to claim 2, wherein: The sealing ring (52) is fixedly connected with a reinforcing plate (522) inside.

4. The structure for preventing corrosion of a lift valve of an RTO furnace according to claim 1, wherein: One side of the bottom bin (1) is provided with an access door (4), and the outer side of the access door (4) is symmetrically provided with handles (41).

5. The structure for preventing corrosion of a lift valve for an RTO furnace according to claim 1, wherein: The top of the top bin (2) is fixedly connected with a base (22), and the cylinder (3) is installed on the base (22).

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