CN210831915U - Explosion-proof door of waste heat boiler and waste heat boiler - Google Patents
Explosion-proof door of waste heat boiler and waste heat boiler Download PDFInfo
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- CN210831915U CN210831915U CN201921624986.4U CN201921624986U CN210831915U CN 210831915 U CN210831915 U CN 210831915U CN 201921624986 U CN201921624986 U CN 201921624986U CN 210831915 U CN210831915 U CN 210831915U
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Abstract
The utility model discloses a waste heat boiler's explosion vent and waste heat boiler, wherein the explosion vent includes: explosion-proof door takeover, explosion-proof door frame, explosion-proof door body and spacing subassembly. The top of explosion vent takeover forms the portion of bending, and the tip of the portion of bending forms the top mouth of pipe. The explosion-proof door frame is connected on the bending part. The explosion-proof door body is connected to the explosion-proof door frame through a rotating shaft so as to open or close the top pipe orifice, the explosion-proof door body is inclined relative to a horizontal plane in a closed state, the center of gravity is located below the rotating shaft, and the explosion-proof door body is normally closed on the explosion-proof door frame under the action of dead weight. The limiting assembly blocks the explosion-proof door body to limit the opening angle of the explosion-proof door body. According to the utility model discloses explosion-proof door, the explosion-proof door body passes through the setting of explosion-proof door frame in top mouth of pipe department, and the explosion-proof door body is on explosion-proof door frame because of the dead weight normal close, is difficult for the air leakage in the flue. When deflagration occurs, the explosion-proof door body opens the high-temperature flue gas to be discharged outside, and the safe operation of the waste heat boiler is ensured. After pressure relief, the explosion-proof door body is quickly reset under the dead weight.
Description
Technical Field
The utility model belongs to the technical field of the boiler, specifically a waste heat boiler's explosion vent and waste heat boiler.
Background
The waste heat boiler is one of core devices in a non-ferrous metal smelting process, can recover high-temperature flue gas discharged by a metallurgical industrial furnace, and utilizes heat carried by the high-temperature flue gas to produce steam required by the process production. Because a certain amount of coal is often mixed in a metallurgical industrial furnace in the smelting process, high-temperature flue gas entering a waste heat boiler often contains a certain amount of combustible components such as hydrocarbon, carbon monoxide and tiny carbon particles, when the combustible mixtures flow through a flue which is not smooth in ventilation and is relatively closed, the deflagration phenomenon is very easy to occur once encountering a fire source, and particularly when the combustible mixtures are gathered at a certain position of the flue, the deflagration is more easy to occur when encountering the fire source, so that the pressure in the waste heat boiler or in the local area in the flue is increased suddenly, and accidents are caused.
It is therefore necessary to install explosion vents in the waste heat boiler and in the flue where combustible mixtures are easily collected. When deflagration occurs, the explosion-proof door is automatically opened to release pressure so as to reduce the impact damage of deflagration to the waste heat boiler and the flue and ensure the safe operation of the waste heat boiler.
The existing oil-fired industrial boiler, gas industrial boiler or pulverized coal industrial boiler is provided with an explosion vent, but the high-temperature flue gas flowing through the waste heat boiler has complex components, so that the adaptability of the explosion vent to the waste heat boiler is poor. If the gravity type explosion vent often appears the explosion vent and jumps frequently, the explosion vent rotates by a wide margin and can't reset, the life of explosion vent reduces. Although some explosion vents can be reset, the explosion vents are not tightly sealed after pressure relief and resetting, and air leakage is easily caused, so that harmful gas and dust in high-temperature flue gas enter the atmosphere to pollute the environment, and the operating efficiency of the boiler is reduced. In addition, the high temperature flue gas that produces after the metal smelting contains the dust content height, and when explosion vent setting area smoke temperature was higher, easy a large amount of slagging scorification led to explosion vent takeover jam, and the explosion vent became invalid.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an exhaust-heat boiler's explosion vent, exhaust-heat boiler's explosion vent can be opened repeatedly, and it is convenient quick to reset, has solved the problem of the safety problem that produces and long-time shutdown when exhaust-heat boiler moves inside superpressure or takes place deflagration.
The utility model discloses still aim at providing the exhaust-heat boiler of the explosion vent that has above-mentioned exhaust-heat boiler.
According to the utility model discloses exhaust-heat boiler's explosion vent, include: the top of the explosion door connecting pipe is provided with a bending part, and the end part of the bending part is provided with a top pipe orifice; the anti-explosion door frame is connected to the bending part; the explosion-proof door body is connected to the explosion-proof door frame through a rotating shaft so as to open or close the top pipe orifice, the explosion-proof door body is inclined relative to a horizontal plane in a closed state, the center of gravity is located below the rotating shaft, and the explosion-proof door body is normally closed on the explosion-proof door frame under the action of self weight; and the limiting assembly blocks the upper part of the anti-explosion door body so as to limit the opening angle of the anti-explosion door body.
According to the utility model discloses exhaust-heat boiler's explosion-proof door, the explosion-proof door body sets up in top mouth of pipe department through explosion-proof door frame, and the explosion-proof door body normal close is on explosion-proof door frame under the effect of dead weight, makes in the flue or exhaust-heat boiler in whole be difficult for leaking out. When the explosion phenomenon occurs inside or the internal pressure meets a certain pressure, the gravity of the explosion door is overcome, the explosion door body opens the high-temperature flue gas to be discharged outwards from the top pipe orifice, the pressure in the flue and the pressure in the waste heat boiler are kept stable for a long time, and the safe operation of the waste heat boiler is ensured. Due to the fact that the limiting assembly is arranged, when the anti-explosion door body is opened upwards, a limit opening position can be formed under the blocking of the limiting assembly, and the anti-explosion door body can reset quickly under the action of self weight after the flue gas is released, so that the internal flue of the waste heat boiler can operate continuously after pressure relief. Because the top of the explosion-proof door connecting pipe forms a bending part and the explosion-proof door body is inclined relative to the horizontal plane in a closed state, the internal part of the explosion-proof door body can be opened only when enough positive pressure is achieved, and the explosion-proof door body is effectively prevented from being opened frequently; and the volume and the weight of the explosion-proof door body can be properly reduced by arranging the bending part.
According to the utility model discloses an exhaust-heat boiler's explosion vent, the portion of bending is the straight tube, the contained angle that forms between the axis of the portion of bending and the vertical line is the acute angle.
According to the utility model discloses an exhaust-heat boiler's explosion vent, spacing subassembly includes: the limiting frame is connected to the bending part; and the limiting body is rotatably connected to the limiting frame and stops above the explosion-proof door body.
Optionally, the stopper body is formed in a wedge shape with a height gradually increasing in a direction toward the stopper frame.
Optionally, the top of the limiting body is rotatably connected to the top of the limiting frame, and the bottom of the limiting body is opened to form a hollow shell structure.
According to the utility model discloses a waste heat boiler's explosion vent, be equipped with the round sealing ring on the explosion vent frame, the explosion vent body closely cooperates when the closed condition on the sealing ring.
According to the utility model discloses a waste heat boiler's explosion vent, the inner wall outside-in that the explosion vent was taken over is equipped with heat preservation and heat-resisting layer respectively.
According to the utility model discloses a waste heat boiler's explosion vent, explosion-proof door frame with it is sealed through the asbestos sealing member between the contact surface that the explosion vent was taken over, explosion-proof door frame with it is sealed through the asbestos sealing member between the contact surface of the explosion-proof door body.
According to the utility model discloses a waste heat boiler's explosion vent still includes the cooling tube, the cooling tube is established the entry end that the explosion vent was taken over is so that get into the high temperature air current cooling that the explosion vent was taken over.
According to the utility model discloses exhaust-heat boiler, include: a flue; the explosion-proof door is the explosion-proof door of the waste heat boiler, and the explosion-proof door is installed on the flue.
According to the utility model discloses exhaust-heat boiler, explosion vent install on the flue, can prevent effectively that the inside detonation phenomenon that produces of flue lasts and endanger the safe operation of whole exhaust-heat boiler system. The deflagration flue gas in the flue is ensured to be rapidly discharged from the explosion-proof door, so that the safe operation pressure in the flue is kept. The explosion-proof door resets fast after the high-pressure flue gas is discharged, air leakage in the flue is avoided, and the waste heat boiler with the explosion-proof door is stable in operating pressure and good in safety.
Additional aspects and advantages of the invention will be set forth in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of an explosion vent according to an embodiment of the present invention installed on a flue.
Fig. 2 is a top view of an explosion vent according to an embodiment of the present invention.
Fig. 3 is a partial sectional view taken along the plane a-a in fig. 2.
Fig. 4 is a longitudinal sectional view (with a part of the structure omitted) of the explosion vent according to an embodiment of the present invention.
Fig. 5 is a longitudinal sectional view of an explosion-proof door body according to an embodiment of the present invention.
Fig. 6 is a side view of a stop assembly in accordance with an embodiment of the present invention.
Fig. 7 is a longitudinal sectional view of the explosion vent connection tube according to an embodiment of the present invention.
Reference numerals:
an explosion vent 100;
the explosion door connecting pipe 1; a bent portion 11; a top nozzle 111; a straight tube part 12;
an explosion-proof door frame 2; a seal ring 21; a fixed portion 22; a boss portion 23;
an explosion-proof door body 3; a rotating shaft 31; an annular lug 32; annular lug bolt holes 321; a fitting portion 33; a seal engaging edge 34;
a limiting component 4; a limit frame 41; a stopper body 42;
a heat-insulating layer 5;
a heat-resistant layer 6;
an asbestos seal 7;
a flue 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "middle", "longitudinal", "height", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
The explosion vent 100 of the waste heat boiler according to the embodiment of the present invention will be described with reference to the drawings attached to the specification.
According to the utility model discloses exhaust-heat boiler's explosion vent 100, as shown in FIG. 1, include: explosion-proof door takeover 1, explosion-proof door frame 2, explosion-proof door body 3 and spacing subassembly 4.
Wherein, the top of explosion vent takeover 1 forms bending 11, and the tip of bending 11 forms top mouth of pipe 111. After the high-temperature flue gas rushes into the explosion door connecting pipe 1, the high-temperature flue gas can be discharged from the top pipe orifice 111.
As shown in fig. 1, the explosion-proof door frame 2 is connected to the bent portion 11. The installation point is conveniently provided for the explosion-proof door body 3.
The explosion-proof door body 3 is connected to the explosion-proof door frame 2 through the rotating shaft 31 so as to open or close the top pipe orifice 111, the explosion-proof door body 3 is inclined relative to the horizontal plane in a closed state, the center of gravity is located below the rotating shaft 31, and the explosion-proof door body 3 is normally closed on the explosion-proof door frame 2 under the action of self weight.
The limiting assembly 4 blocks the upper part of the explosion-proof door body 3 to limit the opening angle of the explosion-proof door body 3.
According to the above structure, the utility model discloses exhaust-heat boiler's explosion vent 100, the explosion-proof door body 3 sets up in top mouth of pipe 111 department through explosion-proof door frame 2, makes the indirect connection of the explosion-proof door body 3 on 1 is taken over to the explosion vent, and explosion vent 100 is normally closed on explosion-proof door frame 2 under the effect of dead weight.
When the deflagration phenomenon appears inside or the internal pressure meets certain pressure, the gravity of the explosion-proof door body 3 is overcome, the explosion-proof door body 3 is opened by taking the rotating shaft 31 as a rotating shaft and is opened upwards and backwards, high-temperature flue gas is discharged outwards from the top pipe orifice 111, the flue gas with overpressure in the flue 200 and the waste heat boiler is ensured to be quickly discharged, the pressure is kept stable for a long time in the operation process of the waste heat boiler, and the safe operation of the waste heat boiler is ensured.
Owing to be provided with spacing subassembly 4 in this application, can form the limit opening position under spacing subassembly 4's the blockking after the explosion-proof door body 3 upwards opens to reset fast under the effect of dead weight after the flue gas release is accomplished, can continue the operation after making exhaust-heat boiler's inside flue 200 pressure release, need not the shut down.
Because the top of explosion vent takeover 1 forms bending 11 and explosion vent body 3 is relative the horizontal plane slope under the closed state, therefore inside must reach sufficient malleation, and explosion vent body 3 just can open, has prevented effectively that explosion vent body 3 from opening frequently, has reduced the rotation and the wearing and tearing of pivot 31, has prolonged the life of pivot 31.
The utility model discloses set up the portion of bending 11 after, the contained angle is formed between the gravity of the explosion-proof door body 3 (the gravity direction is vertically downward) and the central line of the portion of bending 11, carries out the atress analysis to the explosion-proof door body 3, can find that above-mentioned contained angle is less, if will make the explosion-proof door body 3 be in the closure state, the required explosion-proof door body 3 is heavier. When the included angle is reduced to 0, that is, the bending part 11 does not exist, if the explosion-proof door body 3 is ensured to be closed on the top pipe orifice 111, the required explosion-proof door body 3 is the heaviest, and meanwhile, the required volume of the explosion-proof door body 3 is the largest. Therefore, the provision of the bent portion 11 having a bent angle can appropriately reduce the volume and weight of the explosion door body 3, and save cost.
In addition, after the bending part 11 is arranged, the limiting component 4 with smaller weight can ensure the sealing fit of the explosion-proof door body 3 and the explosion-proof door frame 2 when the continuous deflagration does not occur; and ensure that the explosion-proof door body 3 is opened after being subjected to a pressure value greater than or equal to a preset pressure value when continuous explosion and detonation occurs, so that frequent jumping is avoided.
In some embodiments of the present invention, as shown in fig. 1 and 7, the bending portion 11 is a straight pipe, and an included angle formed between an axis of the bending portion 11 and a vertical line is an acute angle. From this, establish behind the tip of the portion of bending 11 when explosion-proof door frame 2 and explosion-proof door body 3, form certain acute angle contained angle between explosion-proof door body 3 and the vertical line for explosion-proof door body 3 can rely on self gravity normal close on top mouth of pipe 111. In these embodiments, the whole end surface of the bent portion 11 is perpendicular to the axis of the bent portion 11, and the axis of the bent portion 11 forms an included angle with the vertical line and also forms an included angle with the horizontal plane.
Alternatively, as shown in fig. 1, a straight tube part 12 is connected to the lower part of the bent part 11, the straight tube part 12 is vertically disposed, and the bent part 11 and the straight tube part 12 are integrally formed. In these embodiments, the straight cylinder part 12 is vertically arranged on the top of the flue 200, and the included angle formed between the bent part 11 and the straight cylinder part 12 is an acute angle.
Optionally, an included angle formed between the axis of the bending portion 11 and the vertical line is 10-80 degrees. In some specific examples, the included angle formed between the axis of the bent portion 11 and the vertical line is 35 degrees. This will make the contained angle between the back and the vertical line of explosion-proof door body 3 closure on explosion-proof door frame 2 form 55 degrees, under this angle, after the high temperature flue gas rushes to the medial surface of explosion-proof door body 3, need reach enough big impact force, could force explosion-proof door body 3 to rotate around pivot 31 and make the high temperature flue gas outwards discharge from top mouth of pipe 111.
Optionally, in some examples, the bending portion 11 is a straight pipe, an included angle formed between an end surface of the straight pipe and a vertical line is an acute angle, and when the explosion-proof door frame 2 and the explosion-proof door body 3 are closed on the end surface of the bending portion 11, an acute angle is also formed between the explosion-proof door body 3 and the vertical line. When an included angle is formed between the end face of the bending part 11 and the vertical line, the axis of the bending pipe can extend in parallel with the horizontal direction.
In some embodiments of the present invention, as shown in fig. 1 and 6, the limiting component 4 includes: a limiting frame 41 and a limiting body 42.
As shown in fig. 1 and 2, the stopper frame 41 is connected to the bent portion 11. The limiting body 42 is rotatably connected to the limiting frame 41 and is stopped above the explosion-proof door body 3. The limiting frame 41 is connected with the bending part 11, so that a rotating connection point can be provided for the limiting body 42, and the limiting body 42 can reliably limit relative to the anti-explosion door body 3.
Alternatively, as shown in fig. 6, the stopper body 42 is formed in a wedge shape gradually increasing in height in a direction toward the stopper frame 41. Through designing into wedge-shaped shape, wedge-shaped spacing body 42 is equivalent to the balancing weight that additionally sets up on the explosion-proof door body 3, can make the explosion-proof door body 3 keep on top mouth of pipe 111 better and open infrequently, can reduce the weight of the explosion-proof door body 3 to a certain extent simultaneously. Optionally, the top of the position-limiting body 42 is rotatably connected to the top of the position-limiting frame 41, and the bottom of the position-limiting body 42 is open to form a hollow structure. The rotation connection between the top of the position-limiting body 42 and the position-limiting frame 41 may be a hinge connection, a pin rotation connection, etc., and is not limited herein. The spacing body 42 plays the effect of auxiliary seal to the explosion-proof door body 3, rotates with spacing body 42 after the explosion-proof door body 3 is opened together, can increase the biggest opening angle of the explosion-proof door body 3 after spacing body 42 continues to rotate certain angle backward for inside high temperature high pressure flue gas discharges fast. Here, the bottom of the limiting body 42 is opened to form a hollow shell structure, which reduces the cost, so that the opening pressure that the explosion-proof door body 3 can bear is in a reasonable range, and the explosion-proof door body 3 is prevented from being overweight, and when the pressure in the furnace reaches the opening pressure, the explosion-proof door body 3 cannot be normally opened.
Optionally, as shown in fig. 5, an annular lifting lug bolt hole 321 is arranged at the top of the explosion-proof door body 3, and an annular lifting lug 32 is arranged in the annular lifting lug bolt hole 321. By arranging the annular lifting lug 32, the lifting or the operation is convenient when the explosion-proof door body 3 is assembled or installed. In addition, after continuous deflagration occurs, when the explosion-proof door body 3 and the limiting body 42 rotate upwards and backwards together, the annular lifting lug 32 can also be stopped against one side surface of the limiting body 42 or clamped in the limiting body 42 of the hollow shell, so that the explosion-proof door body 3 forms the maximum opening angle relative to the top pipe orifice 111.
In some embodiments of the present invention, as shown in fig. 1, fig. 3 and fig. 4, a circle of sealing ring 21 is disposed on the explosion-proof door frame 2, and the explosion-proof door body 3 is tightly fitted on the sealing ring 21 in the closed state. The sealing performance of the explosion-proof door body 3 after being closed on the explosion-proof door frame 2 is improved, so that the waste heat boiler and the flue 200 are continuously kept in a better sealing state, and the flue gas cannot be leaked when the system normally runs.
In some embodiments of the present invention, as shown in fig. 3 and 4, the inner wall of the explosion vent pipe 1 is provided with a heat insulating layer 5 and a heat resistant layer 6 from outside to inside respectively. The heat that the inside high temperature flue gas of heat preservation 5 carried takes over 1 harm to the explosion vent, and the life of 1 is taken over to the extension explosion vent, and the heat that the heat preservation 5 carried has also prevented that the high temperature flue gas from further transmitting towards the outside that 1 was taken over to the explosion vent, has reduced the calorific loss of system. The heat-resistant layer 6 is arranged on the innermost layer of the explosion-proof door connecting pipe 1, is in direct contact with high-temperature flue gas, prevents the explosion-proof door connecting pipe 1 from being ignited, reduces the flow cross section area of the explosion-proof door connecting pipe 1, increases the gas speed when the high-temperature flue gas passes through, and accelerates the smoke exhaust rate.
Optionally, the heat preservation layer 5 is a heat preservation concrete layer, the heat-resistant layer 6 is a heat-resistant concrete layer, the structure is hard, other connecting agent joints do not need to be added, the processing is easy, the relative position between the heat preservation layer 5 and the heat-resistant layer 6 is not easy to change, and the explosion-proof door frame 2 is convenient to connect. The specific connection form is as follows:
the end parts of the heat preservation concrete layer and the heat-resistant concrete layer are flush with the end part of the bending part 11, and the thickness of the heat preservation concrete layer and the heat-resistant concrete layer along the radial direction of the bending part 11 increases the installation contact surface of the explosion door connecting pipe 1.
Alternatively, as shown in fig. 3 and 4, the explosion-proof door frame 2 includes a fixing portion 22 disposed on the heat insulating layer 5 and the heat resistant layer 6, and the fixing portion 22 is fixedly connected or detachably connected with the heat insulating layer 5 and the heat resistant layer 6. Here, the fixed connection may be a screw connection, and the detachable connection may be a bolt and nut connection.
Advantageously, as shown in fig. 3, the contact surface between the explosion-proof door frame 2 and the explosion-proof door connector 1 is sealed by a asbestos seal 7. For example, the asbestos sealing element 7 can be made of round asbestos rope or triangular asbestos rope, so that the sealing performance between the explosion-proof door frame 2 and the explosion-proof door connecting pipe 1 is ensured, the asbestos rope has good high-temperature resistance and long service life, is convenient to enclose between contact surfaces, and has controllable shape.
Alternatively, as shown in fig. 3 and 4, the explosion-proof door frame 2 further includes a protruding portion 23, the protruding portion 23 is connected to the fixing portion 22, and the protruding portion 23 extends outward along the axial direction of the bent portion 11 and is formed in a ring shape, so that a certain step shape is formed between the protruding portion 23 and the fixing portion 22. The outlet formed between the annular convex parts 23 is the final outlet of high-temperature flue gas, and the explosion-proof door body 3 is tightly matched on the convex parts 23 and shields the outlet.
Advantageously, when the projection 23 is provided, the upper surface of the projection 23 is provided with a ring of sealing rings 21, and after the explosion-proof door body 3 is closed on the projection 23 and the outlet, the explosion-proof door body 3 is in contact with the sealing rings 21.
Alternatively, as shown in fig. 3, the explosion-proof door body 3 includes a sealing engagement edge 34, and when the explosion-proof door body 3 is closed on the explosion-proof door frame 2, the sealing engagement edge 34 abuts against the sealing ring 21 to form a tight contact.
Alternatively, as shown in fig. 3, the explosion-proof door body 3 includes a fitting portion 33, and after the explosion-proof door body 3 is closed on the explosion-proof door frame 2, the fitting portion 33 of the explosion-proof door body 3 is fitted into the opening in the middle of the explosion-proof door frame 2, and in some examples, the fitting portion 33 is tightly fitted on the opening formed in the middle of the protruding portion 23. The embedding part 33 increases the fit between the explosion-proof door frame 2 and the explosion-proof door body 3, so that the explosion-proof door frame 2 and the explosion-proof door body 3 are not inclined after being closed, and air leakage is not easy to occur after being closed.
Optionally, the contact surfaces between the explosion-proof door frame 2 and the explosion-proof door body 3 are also sealed by asbestos sealing pieces 7. The asbestos sealing element 7 can be sealed by an asbestos square rope, and the sealing performance of the explosion-proof door body 3 closed on the explosion-proof door frame 2 can be further enhanced. In some examples, the asbestos seal 7 is a sealing ring 21 as shown in the figures. In other examples, the asbestos seal 7 and the sealing ring 21 are two separate parts, which respectively seal the contact surface between the explosion-proof door frame 2 and the explosion-proof door body 3.
The thicknesses of the heat-insulating layer 5 and the heat-resistant layer 6 are related to the temperature of the flue gas at the installation position of the explosion-proof door 100, the thicknesses of the heat-insulating layer and the heat-resistant layer are designed to be thicker as the temperature is higher, and the thicknesses of the heat-insulating layer and the heat-resistant layer are designed to be thinner as the temperature is lower, so that the heat-insulating layer and the heat-resistant layer can be reasonably.
The utility model discloses an in some embodiments, still include the cooling tube, the cooling tube is established at the entry end of explosion vent takeover 1 so that the high temperature air current cooling that gets into explosion vent takeover 1. In some specific examples, the cooling pipe is formed into a ceiling pipe, and the ceiling pipe is arranged at the inlet of the explosion door connecting pipe 1, so that the temperature of flue gas entering the explosion door connecting pipe 1 is reduced, large-area slagging in the area of the explosion door connecting pipe 1 is effectively prevented, and the phenomenon that the explosion door body 3 cannot be normally opened due to the fact that the slagging blocks the explosion door connecting pipe 1 is avoided.
Optionally, in other examples, the cooling pipe is a water cooling pipe, and circulating water is arranged in the water cooling pipe to cool the high-temperature flue gas entering the explosion door connecting pipe 1. The temperature of the circulating water is 200-300 ℃.
The waste heat boiler of the embodiment of the present invention is described below with reference to the attached drawings.
According to the utility model discloses exhaust-heat boiler, as shown in fig. 1, include: flue 200 and vent 100. The explosion vent 100 is the explosion vent 100 of the waste heat boiler, and the structure of the explosion vent 100 is not described herein. Vent 100 is mounted on flue 200.
According to the structure, the utility model discloses exhaust-heat boiler, explosion vent 100 install on flue 200, can prevent effectively that the inside detonation phenomenon that produces of flue 200 lasts and endanger the safe operation of whole exhaust-heat boiler system. The deflagration flue gas in the flue 200 is ensured to be rapidly discharged from the explosion-proof door 100, so that the safe operation pressure in the flue 200 is kept. The explosion vent 100 can realize quick reset after high-temperature flue gas is discharged, the whole system is sealed again, no air leakage occurs in the flue 200, and the waste heat boiler with the explosion vent 100 has stable operation pressure and good safety.
Of course, the explosion vent 100 of the present invention can also be used in boilers with simpler smoke components, for preventing smoke evacuation and pressure reduction when deflagration or operating pressure increase in the boiler system.
The specific structure of the explosion vent 100 of the waste heat boiler according to the embodiment of the present invention will be described with reference to the drawings.
Examples
A explosion vent 100 of a waste heat boiler, comprising: the explosion-proof door comprises an explosion-proof door connecting pipe 1, an explosion-proof door frame 2, an explosion-proof door body 3, a limiting assembly 4, a heat insulating layer 5, a heat-resistant layer 6 and an asbestos sealing element 7.
As shown in fig. 1, the explosion vent connection pipe 1 of the present invention is integrally formed into a cylindrical structure, and is installed in a ceiling flue gas flow direction turning region of a waste heat boiler uptake flue 200. And a group of ceiling pipes are arranged at the inlet end of the explosion door connecting pipe 1 and are used as cooling pipes.
As shown in fig. 1 and 7, the explosion vent connection pipe 1 has a wall thickness of about 5mm, the explosion vent connection pipe 1 includes a cylindrical straight pipe portion 12 and a cylindrical bent portion 11, the axis of the straight pipe portion 12 coincides with the axis of the uptake duct 200, and an acute angle of 35 degrees is formed between the axis of the bent portion 11 and the axis of the straight pipe portion 12. The bent portion 11 is integrally formed with the straight tube portion 12. The end of the bend 11 forms a top spout 111. And a heat insulation concrete layer with the thickness of 50mm is sequentially added on the whole inner wall of the explosion door connecting pipe 1 from outside to inside to serve as a heat insulation layer 5, and a heat-resistant concrete layer with the thickness of 50mm serves as a heat-resistant layer 6. The top ends of the heat-insulating layer 5 and the heat-resistant layer 6 are flush with the end faces of the bent parts 11.
As shown in fig. 1, the explosion-proof door frame 2 is connected to the bent portion 11. The contact surface between the explosion-proof door frame 2 and the heat-resistant concrete layer and the heat-insulating concrete layer is sealed by an asbestos sealing element 7. The explosion-proof door frame 2 includes a fixing portion 22, a boss portion 23, and a sealing ring 21. Wherein the fixing part 22 is arranged on the heat insulation layer 5 and the heat-resistant layer 6 through a threaded nut connector, the bulge part 23 is annular and protrudes out of the surface of the fixing part 22, and the surface of the bulge part 23 is provided with a circle of sealing rings 21.
As shown in fig. 3, 4 and 5, the explosion-proof door body 3 includes a rotation shaft 31, a fitting portion 33 and a seal-fitting edge 34. The explosion-proof door body 3 is rotatably connected to one end of the explosion-proof door frame 2 through a rotating shaft 31, and the explosion-proof door body 3 can rotate on the explosion-proof door frame 2 to open or close the top pipe orifice 111. When the explosion-proof door body 3 is closed on the explosion-proof door frame 2, the embedded part 33 is tightly matched on the opening formed in the middle of the convex part 23, and the sealing matching edge 34 is stopped against the sealing ring 21.
As shown in fig. 2 and 6, the position limiting assembly 4 includes a position limiting frame 41 and a position limiting body 42, one end of the position limiting frame 41 is connected to the bending portion 11, the position limiting frame 41 has a certain height, the position limiting frame 41 extends upwards along the axial direction of the bending portion 11, and the top of the position limiting body 42 is rotatably connected to the top end of the position limiting frame 41. The detonation phenomenon does not occur in the waste heat boiler and the flue 200, and when the waste heat boiler normally operates, the free end of the limiting body 42 is in contact with the explosion-proof door body 3 to form a certain auxiliary sealing effect. After deflagration occurs in the flue 200, high-temperature and high-speed flue gas is cooled from the ceiling pipe and enters the explosion-proof door connecting pipe 1, then the flue gas impacts the explosion-proof door body 3, overcomes the dead weight to enable the explosion-proof door body 3 to rotate relative to the explosion-proof door frame 2 and open the top pipe orifice 111, and the waste heat boiler system recovers normal operation pressure after the flue gas is quickly released. Under the limit of the limit body 42, the opening and closing angle of the explosion-proof door body 3 is limited, and after pressure relief, the explosion-proof door body 3 quickly falls downwards and resets to the explosion-proof door frame 2, so that the internal operation pressure of the waste heat boiler system is kept stable, and air leakage is avoided.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
According to the explosion vent 100 of the waste heat boiler and other components of the waste heat boiler such as the structure of the waste heat boiler and the structure of the flue 200 of the present invention, the pressure and temperature changes in the flue 200 during deflagration are known to those skilled in the art, and will not be described in detail herein.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An explosion vent of a waste heat boiler, comprising:
the top of the explosion door connecting pipe is provided with a bending part, and the end part of the bending part is provided with a top pipe orifice;
the anti-explosion door frame is connected to the bending part;
the explosion-proof door body is connected to the explosion-proof door frame through a rotating shaft so as to open or close the top pipe orifice, the explosion-proof door body is inclined relative to a horizontal plane in a closed state, the center of gravity is located below the rotating shaft, and the explosion-proof door body is normally closed on the explosion-proof door frame under the action of self weight;
and the limiting assembly blocks the upper part of the anti-explosion door body so as to limit the opening angle of the anti-explosion door body.
2. The explosion vent of a waste heat boiler as recited in claim 1, wherein the bent portion is a straight tube, and an included angle formed between an axis of the bent portion and a vertical line is an acute angle.
3. The explosion vent of a waste heat boiler as set forth in claim 1, wherein the stopper assembly includes:
the limiting frame is connected to the bending part;
and the limiting body is rotatably connected to the limiting frame and stops above the explosion-proof door body.
4. An explosion vent for a waste heat boiler as set forth in claim 3, wherein the stopper body is formed in a wedge shape with a height gradually increasing in a direction toward the stopper frame.
5. The explosion vent of a waste heat boiler as recited in claim 3, wherein the top of the position-limiting body is rotatably connected to the top of the position-limiting frame, and the bottom of the position-limiting body is open to form a hollow shell structure.
6. The explosion vent of a waste heat boiler as recited in claim 1, wherein a ring of sealing rings is disposed on the explosion-proof door frame, and the explosion-proof door body is tightly fitted on the sealing rings in a closed state.
7. An explosion vent of a waste heat boiler as recited in any one of claims 1 to 6, wherein the inner wall of the explosion vent connecting pipe is provided with an insulating layer and a heat-resistant layer from outside to inside respectively.
8. The explosion vent of a waste heat boiler as recited in claim 1, wherein the contact surface between the explosion vent frame and the explosion vent connecting pipe is sealed by asbestos sealing elements, and the contact surface between the explosion vent frame and the explosion vent body is sealed by asbestos sealing elements.
9. An explosion vent of a waste heat boiler as recited in any one of claims 1 to 6, further comprising a cooling pipe provided at an inlet end of the explosion vent connection pipe to cool down the high temperature air flow entering the explosion vent connection pipe.
10. A waste heat boiler, comprising:
a flue;
an explosion vent of a waste heat boiler according to any one of claims 1 to 9, the explosion vent being mounted on the flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921624986.4U CN210831915U (en) | 2019-09-26 | 2019-09-26 | Explosion-proof door of waste heat boiler and waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921624986.4U CN210831915U (en) | 2019-09-26 | 2019-09-26 | Explosion-proof door of waste heat boiler and waste heat boiler |
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| CN210831915U true CN210831915U (en) | 2020-06-23 |
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| CN201921624986.4U Active CN210831915U (en) | 2019-09-26 | 2019-09-26 | Explosion-proof door of waste heat boiler and waste heat boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566922A (en) * | 2019-09-26 | 2019-12-13 | 中国恩菲工程技术有限公司 | Explosion-proof door of waste heat boiler and waste heat boiler |
| CN113606930A (en) * | 2021-08-20 | 2021-11-05 | 重庆大朗冶金新材料有限公司 | Supporting explosion-proof mechanism of hot stove in ore deposit |
-
2019
- 2019-09-26 CN CN201921624986.4U patent/CN210831915U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566922A (en) * | 2019-09-26 | 2019-12-13 | 中国恩菲工程技术有限公司 | Explosion-proof door of waste heat boiler and waste heat boiler |
| CN113606930A (en) * | 2021-08-20 | 2021-11-05 | 重庆大朗冶金新材料有限公司 | Supporting explosion-proof mechanism of hot stove in ore deposit |
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