Structure for burner nozzle in RTO system

Abstract

The utility model relates to the technical field of industrial waste gas treatment, in particular to a structure of a burner nozzle used in an RTO system, which comprises a metal sleeve, a combustion cavity used for mixing fuel and gas is arranged in the metal sleeve, an air inlet cavity used for providing air is arranged at one end of the metal sleeve, and a nozzle used for ignition is arranged at the other end of the metal sleeve. A vector adjusting mechanism used for controlling and adjusting the opening size of the nozzle is arranged between the nozzle and the metal sleeve. The burner adopts an air single heat storage type combustion technology, so that fuel and gas in the combustion cavity are fully and uniformly mixed, a local high-temperature area in the combustion cavity is slowed down, the generation of thermal nitrogen oxides is inhibited, and the emission of nitrogen oxides in combustion products is reduced; and meanwhile, by arranging the vector adjusting mechanism, the opening size of the nozzle can be accurately adjusted according to different working conditions, the mixing proportion of fuel and air is always in the optimal state, and therefore the combustion efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to technical field especially is related to a structure for the burner nozzle in RTO system. BACKGROUND

[0002] The regenerative thermal oxidation furnace (RTO) is a kind of high-efficiency organic waste gas treatment equipment.Compared with traditional catalytic combustion, direct-fired thermal oxidation furnace (TO), it has the characteristics of high thermal efficiency, low operating cost, can handle large wind volume low concentration waste gas, etc., when concentration is slightly higher, secondary waste heat recovery can be carried out, greatly reduces the production operation cost, in RTO furnace thermal type thermal incinerator system, the burner nozzle in the combustion system equipped is the important component of combustion equipment, and its performance directly influences the efficiency and quality of waste gas treatment.The traditional burner nozzle has many problems in practical application.

[0003] Firstly, the nozzle opening size is often fixed, cannot be flexibly adjusted according to the waste gas volume, waste gas composition and combustion demand under different working conditions.This leads to the mixing ratio of fuel and air difficult to reach the best state in some cases, causes insufficient combustion, not only wastes energy, but also may lead to substandard waste gas treatment;Secondly, the existing burner nozzle is insufficient in heat insulation and heat storage function in the combustion chamber in structural design.In the high-temperature combustion process, heat is easily lost, on the one hand, reduces the combustion efficiency, on the other hand, may cause adverse effects on surrounding equipment and environment.At the same time, due to the lack of effective heat storage structure, it is difficult to quickly and stably burn when combustion condition changes, affects the stability and reliability of the system;In addition, the air inlet and fuel supply control of traditional burner is not accurate enough, cannot realize fine adjustment and control of combustion process.This makes it difficult to ensure the efficient and stable operation of the system when facing complex waste gas treatment requirements. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the technical defects proposed in the above background art, the purpose of the utility model is to provide a structure for the burner nozzle in RTO system, effectively realizes the flexible adjustment of nozzle opening size, optimizes the heat insulation and heat storage function in the combustion chamber, and accurately controls the air inlet and fuel supply, so as to improve the combustion efficiency, waste gas treatment effect and operating stability of RTO system.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The structure of a burner nozzle for RTO system comprises a metal sleeve, a combustion cavity for mixing fuel and gas in the metal sleeve, an air inlet cavity for providing air at one end of the metal sleeve, and a nozzle for ignition at the other end of the metal sleeve, a vector adjustment mechanism for controlling and adjusting the opening size of the nozzle between the nozzle and the metal sleeve, the vector adjustment mechanism comprising a movable sleeve ring on the outer wall of the metal sleeve, a telescopic pull rod for driving the movable sleeve ring to slide along the outer wall of the sleeve, and a multi-link adjustment assembly connected between the movable sleeve ring and the nozzle, the movable sleeve ring being arranged between the metal sleeve and the nozzle, the telescopic pull rod being circumferentially distributed on the metal sleeve by fixed blocks, one end of the telescopic pull rod being fixedly connected with the movable sleeve ring, and the other end being connected with a driving member, and the multi-link adjustment assembly being circumferentially arranged on the outer side of the nozzle and being connected with the telescopic pull rod and the movable sleeve ring through the movable sleeve ring.

[0007] Preferably, the nozzle is composed of a plurality of adjustment plates arranged in mutual staggered superposition and an expansion plate connected to the end of the adjustment plate, two adjacent adjustment plates being connected through a fixed member, the expansion plate and the adjustment plate being arranged in a streamline shape, one end of the expansion plate being rotatably connected with the adjustment plate through a hinge shaft, and the other end being provided with a sliding plate between the expansion plate and the movable sleeve ring, the sliding plate being fixed to the inner side of the movable sleeve ring.

[0008] Preferably, the multi-link adjustment assembly comprises a hinged seat, a first link, a second link, a third link and a fourth link, one end of the first link and the second link being hingedly connected to the hinged seat, and the other end being movably connected with the third link and the fourth link through a link joint, and one end of the third link and the fourth link being fixedly connected to the movable sleeve ring.

[0009] Preferably, a heat insulation sleeve is further arranged in the combustion cavity, the center of the heat insulation sleeve and the axis of the metal sleeve being located on the same axis, and a space for filling heat accumulators being left between the heat insulation sleeve and the metal sleeve.

[0010] Preferably, a valve plate is further arranged between the air inlet cavity and the combustion cavity, the valve plate being fixed to one end of the heat insulation sleeve, and a valve rod being connected to the valve plate, one end of the valve rod extending out of the air inlet cavity and being drivingly connected with a cylinder.

[0011] Preferably, an air pipe for providing air is further connected to the air inlet cavity, the air pipe being in communication with the air inlet cavity.

[0012] Preferably, a fuel pipe for providing fuel is further arranged on the metal sleeve, the fuel pipe being in communication with the combustion cavity.

[0013] Preferably, the metal sleeve is provided with a plurality of metal sleeves, and the plurality of metal sleeves are fixed through the connecting flanges.

[0014] In summary, the beneficial effects of the present application are:

[0015] The burner of the present application adopts air single-accumulation type combustion technology, so that the fuel and gas in the combustion chamber are fully mixed and uniform, the local high-temperature area in the combustion chamber is slowed down, the generation of "thermal type" nitrogen oxides is inhibited, the nitrogen oxides emission in the combustion products is reduced, and the vector adjusting mechanism is set, so that the nozzle opening size can be accurately adjusted according to different working conditions, the mixing ratio of fuel and air is always in the best state, the combustion efficiency is improved, energy waste is reduced, the waste gas treatment meets the standard, so that the incineration effect of the RTO system can be further improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the structure of the burner nozzle for the RTO system in the present application;

[0017] Figure 2 is a front view of the structure of the burner nozzle for the RTO system in the present application;

[0018] Figure 3 is Figure 2 the sectional view of A-A plane in the present application;

[0019] Figure 4 is Figure 2 the sectional view of B-B plane in the present application.

[0020] Explanation of reference numerals in the drawings:

[0021] 1, metal sleeve; 11, fuel chamber; 12, air inlet chamber; 13, flange; 2, nozzle; 21, adjusting plate; 22, expansion plate; 23, fixing piece; 24, sliding plate; 3, vector adjusting mechanism; 31, movable collar; 32, telescopic pull rod; 33, multi-link adjusting assembly; 331, hinged seat; 332, first link; 333, second link; 334, third link; 335, fourth link; 4, heat insulation sleeve; 5, valve plate; 6, valve rod; 7, air cylinder; 8, air connection pipe; 9, fuel pipe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0023] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0024] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0025] The following is in conjunction with the appendix Figures 1-4 The present invention provides a more detailed description of an embodiment of a burner nozzle structure for an RTO system.

[0026] Example 1

[0027] like Figure 1 As shown, this embodiment provides a structure for a burner nozzle in an RTO system, including a metal sleeve 1, within which a combustion chamber 11 is provided for mixing fuel and air. An air inlet chamber 12 is located at the left end of the metal sleeve 1, connected to an external air source via an air connector 8; a nozzle 2 is located at the right end, connected to the combustion chamber 11. The nozzle 2 consists of multiple staggered, stacked adjusting plates 21 and expansion plates 22. The adjusting plates 21 are connected by bolt fasteners 23, and the expansion plates 22 are hinged to the adjusting plates 21 via hinge shafts, forming an adjustable streamlined outlet structure, thereby effectively reducing airflow resistance and improving combustion efficiency.

[0028] Specifically, to achieve real-time adjustment of the nozzle 2 opening, a vector adjustment mechanism 3 is provided on the outer side of the metal sleeve 1, including a movable collar 31, a telescopic rod 32, and a multi-link adjustment assembly 33. The movable collar 31 is sleeved on the outer wall of the metal sleeve 1 and is driven to slide axially by three circumferentially distributed telescopic rods 32. One end of the telescopic rod 32 is fixed to a fixed block of the metal sleeve 1, and the other end is connected to a driving component, which can be a servo motor or a driving cylinder.

[0029] Among them, such as Figure 2 , 3As shown, the multi-link adjusting assembly 33 is composed of a hinged seat 331, a first link 332, a second link 333, a third link 334 and a fourth link 335, wherein the hinged seat 331 is fixed outside the adjusting plate 21, the first link 332 and the second link 333 are hinged to the hinged seat 331, the third link 334 and the fourth link 335 are fixed at one end on the movable collar 31 and are connected to the first and second links through link joints at the other end. When the servo motor drives the telescopic pull rod 32 to extend or retract, the movable collar 31 drives the third link 334 and the fourth link 335 to move, thereby controlling the first link 331 and the second link 332 on the adjusting plate 21 to move synchronously, and forcing the adjusting plate 21 and the expansion plate 22 to rotate around the hinge shaft through the multi-link adjusting assembly 33, so as to adjust the expansion angle of the nozzle 2 opening, and the expansion angle ranges from 15° to 60°.

[0030] In this embodiment, as shown, Figure 4 A ceramic fiber heat insulation sleeve 4 is arranged in the combustion chamber 11, which is coaxially arranged with the metal sleeve 1 and forms an annular space between the two to fill cordierite heat accumulators. The heat insulation sleeve 4 can effectively reduce the heat loss of the combustion chamber 11 to the outside and improve the combustion efficiency. The cordierite heat accumulators absorb and store heat during the combustion process, and release the stored heat when the combustion condition changes, which helps to quickly stabilize the combustion state and enhance the heat recovery efficiency and system stability.

[0031] In this embodiment, a valve plate 5 is arranged between the air inlet chamber 12 and the combustion chamber 11, the valve plate 5 is connected with a cylinder 7 through a valve rod 6, and the cylinder 7 drives the opening of the valve plate 5 to accurately adjust the amount of air entering the combustion chamber 11. A fuel pipe 9 is arranged on the side wall of the metal sleeve 1, which enters the combustion chamber 11 in a tangential manner to form a rotational flow mixing of fuel and air. Through accurate control of air and fuel supply, fine regulation and control of the combustion process can be realized, ensuring that the mixing ratio of fuel and air is always in the best state, improving the combustion efficiency and exhaust treatment effect,

[0032] Specifically, during operation, the fuel and air are premixed in the combustion chamber 11 and then injected into the RTO furnace through the nozzle 2. The vector adjusting mechanism 3 adjusts the opening of the nozzle 2 in real time according to the exhaust concentration to ensure that the fuel is fully burned in a low-oxygen environment and the generation of nitrogen oxides is inhibited.

[0033] In this embodiment, a plurality of metal sleeves 1 are arranged, and the plurality of metal sleeves 1 are fixed through the connecting flange plate 13. This connection method is convenient for installation and disassembly, and can flexibly adjust the length and structure of the burner nozzle according to actual needs to meet the use requirements of different scale RTO systems.

[0034] Example 2

[0035] The embodiment is different from the embodiment 1 in that the burner nozzle is modularly designed and the fuel supply mode is different.

[0036] In addition, the fuel pipe 9 adopts a double-layer sleeve structure, the inner pipe is connected with natural gas, the outer pipe is connected with hydrogen, the two fuels are mixed in layers in the combustion chamber 11, and staged combustion is realized.

[0037] The embodiment further improves the combustion stability and the adjustment precision through the modular design and the fuel staged supply, and is especially suitable for treating complex waste gas containing high-concentration VOCs.

[0038] The working principle of the utility model is as follows:

[0039] The fuel is tangentially introduced into the combustion chamber 11 through the fuel pipe 9, is mixed with the air introduced from the air inlet chamber 12, and the air flow is adjusted by the valve plate 5 through the air cylinder 7.

[0040] The embodiments of the specific embodiment are the preferred embodiments of the application, and are not limited to the protection scope of the application, wherein the same parts are indicated by the same reference numerals. Therefore, equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A structure for a burner nozzle in an RTO system, comprising a metal sleeve, characterized in that, The metal sleeve has a combustion chamber for mixing fuel and gas, and one end of the metal sleeve is provided with an air intake chamber for providing air, while the other end is provided with a nozzle for ignition. A vector adjustment mechanism for controlling and adjusting the nozzle opening size is provided between the nozzle and the metal sleeve. The vector adjustment mechanism includes a movable collar sleeved on the outer wall of the metal sleeve, a telescopic rod for driving the movable collar to slide along the outer wall of the sleeve, and a multi-link adjustment assembly connected between the movable collar and the nozzle. The movable collar is located between the metal sleeve and the nozzle. The telescopic rod is circumferentially distributed on the metal sleeve by fixed blocks, and one end of the telescopic rod is fixedly connected to the movable collar, while the other end is connected to a driving component. The multi-link adjustment assembly is circumferentially arrayed on the outer surface of the nozzle, and the multi-link adjustment assembly is linked to the telescopic rod through the movable collar.

2. The structure of the burner nozzle for an RTO system according to claim 1, characterized in that, The nozzle consists of multiple staggered and stacked adjustment plates and an expansion plate connected to the end of the adjustment plates. Adjacent adjustment plates are connected by a fixing member. The expansion plate and the adjustment plate are streamlined. One end of the expansion plate is rotatably connected to the adjustment plate by a hinge shaft, and the other end is provided with a sliding plate between it and the movable collar. The sliding plate is fixed on the inner side of the movable collar.

3. The structure of the burner nozzle for an RTO system according to claim 2, characterized in that, The multi-link adjustment assembly includes a hinge seat, a first link, a second link, a third link, and a fourth link. The hinge seat is fixed around the outer side of the adjustment plate. One end of the first link and the second link is hinged to the hinge seat, and the other end is movably connected to the third link and the fourth link through a link joint. One end of the third link and the fourth link is fixed to a movable collar.

4. The structure of the burner nozzle for an RTO system according to claim 3, characterized in that, The combustion chamber is also equipped with a heat insulation sleeve. The center of the heat insulation sleeve and the axis of the metal sleeve are on the same axis, and there is a space between the heat insulation sleeve and the metal sleeve for filling the heat storage body.

5. The structure of the burner nozzle for an RTO system according to claim 4, characterized in that, A valve plate is also provided between the air intake chamber and the combustion chamber. The valve plate is fixed to one end of the heat insulation sleeve, and a valve stem is connected to the valve plate. The end of the valve stem away from the valve plate extends out of the air intake chamber and is connected to a cylinder.

6. The structure of the burner nozzle for an RTO system according to claim 5, characterized in that, The air intake chamber is also connected to an air connector for supplying air, and the air connector is in communication with the air intake chamber.

7. The structure of the burner nozzle for an RTO system according to claim 6, characterized in that, The metal sleeve is also provided with a fuel pipe for supplying fuel, and the fuel pipe is connected to the combustion chamber.

8. The structure of the burner nozzle for an RTO system according to claim 7, characterized in that, Multiple metal sleeves are provided, and the multiple metal sleeves are fixed together by connecting flanges.

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