Self-cooling ultrahigh temperature gate valve applied to high-temperature flue

Abstract

A kind of self-cooled ultra-high temperature gate applied to high-temperature flue, including high-temperature gate body, high-temperature gate and support, the box is formed in the high-temperature gate, the box is provided with several chimney cooling structures, the several chimney cooling structures all include inner air duct partition and inner air duct deflector, the box is provided with several air inlet and air outlet groups corresponding to chimney cooling structure, the air inlet is provided with air inlet, the air outlet is provided with air outlet, the air outlet is higher than air inlet, the cold air of the chimney cooling structure enters the box through air inlet, and the box is cooled again and discharged from air outlet, the working principle of chimney effect is fully utilized in the present application, and the box in high-temperature gate is naturally cooled by natural ventilation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coking, cement, high-temperature furnace kiln, in particular to a self-cooling ultra-high-temperature gate valve applied to a high-temperature flue. BACKGROUND

[0002] At present, the high-temperature flue pipe is generally provided with a gate and a butterfly valve as a cutting or regulating device, which is provided with a metal high-temperature gate, a water-cooled high-temperature gate, a water-cooled high-temperature butterfly valve and a high-temperature gate made of castable. The water-cooled high-temperature valve has the following disadvantages: in the case of high temperature, water leakage will cause serious consequences, and even the flue and the equipment will be scrapped. In addition, the equipment cost is high, the water quality requirement is high, and the secondary energy consumption is large. In particular, the high-temperature flue of the coke oven and the three-stage air flue of the cement basically do not use water-cooled valves, but use castable gate plates as regulating and cutting devices for high-temperature flues. In particular, the high-temperature flue of the horizontal coke oven is as high as 1400 DEG C, and the high-temperature flue of the three-stage air of the cement is about 980 DEG C. At present, the domestic castable is provided with a heat-resistant steel as a steel reinforcement dragon and a steel reinforcement cage as a support for the castable. The steel reinforcement cage is protected by a castable wear-resistant layer outside. There is also a whole frame made of heat-resistant steel frame and a castable wear-resistant layer. However, the gate plate is in the high-temperature flue for a long time. Although the castable has a heat insulation effect, the heat-resistant steel of the steel reinforcement cage will reach the temperature of the flue medium in a few hours. At present, the temperature resistance of the domestic heat-resistant stainless steel such as 06Cr25Ni20 is 1035 DEG C without oxidation skin, and the temperature resistance of the GH747 high-temperature alloy is 1200 DEG C without oxidation skin. When the alloy steel or heat-resistant stainless steel is at a high temperature of 900 DEG C, its mechanical strength is very low, and the price of the high-temperature alloy steel is very high. The thermal expansion and contraction of the metal is much larger than that of the refractory castable, so the large-diameter gate plate is very easy to crack the refractory castable. When the refractory castable gate plate is cracked, the high-temperature flue gas directly heats and corrodes the heat-resistant steel, and the whole gate plate is broken during use. SUMMARY

[0003] Therefore, the present application provides a self-cooling ultra-high-temperature gate valve applied to a high-temperature flue.

[0004] To achieve the above object, the present application provides the following technical scheme:

[0005] The utility model provides a kind of self-cooled ultrahigh temperature gate valve applied to high-temperature flue, including high-temperature gate body, high-temperature gate and support, the box is formed in the high-temperature gate, the box is provided with several chimney cooling structures, the box is provided with several chimney cooling structures, several chimney cooling structures include inner air duct partition and inner air duct guide vane, the box is provided with several air inlet and air outlet groups corresponding chimney cooling structure, the air inlet is provided with air inlet, the air outlet is provided with air outlet, the air outlet is higher than air inlet, the cold air of chimney cooling structure enters the box by air inlet, and the box is cooled again from air outlet.

[0006] Preferably, the inner air duct partition separates the box into several small chambers, the inner air duct guide vane is arranged in the small chamber, one end of the inner air duct guide vane is fixed to the top wall of the small chamber, the other end of the inner air duct guide vane and the bottom wall of the small chamber form a communication part, and the air inlet and the air outlet are arranged on both sides of the communication part, and the small chamber is provided with an atomizer.

[0007] Preferably, the high-temperature gate is provided with a U-shaped tube, the U-shaped tube is provided with a low-position tube and a high-position tube, the low-position tube and the high-position tube are communicated through a lower bend, the low-position tube is provided with an air inlet, the high-position tube is provided with an air outlet, and the air outlet of the high-position tube is higher than the low-position tube.

[0008] Preferably, the box is provided with a refractory layer, and the refractory layer is composed of a heat insulation layer and a wear-resistant layer.

[0009] Preferably, the high-temperature gate body includes a gate body upper opening and a gate body inner groove, the high-temperature gate is installed in the gate body inner groove, and a sealing tightness driving device is arranged on the gate body upper opening to seal the high-temperature gate and the gate body inner groove.

[0010] Preferably, the sealing tightness driving device includes a long sealing strip, a short sealing strip, a tightness crank and a driving device, the tightness crank is arranged between the long sealing strip and the short sealing strip, two sections of the long sealing strip are respectively provided with shaft pins one, two sections of the short sealing strip are respectively provided with shaft pins two, the long sealing strip and the short sealing strip are connected through the corresponding shaft pins one and shaft pins two at both ends of the tightness crank, the driving device is connected with the short sealing strip, long strip pre-tighteners are arranged on both sides of the long sealing strip, the long strip pre-tighteners are composed of a support block and a long strip tightness spring, the support block is arranged on the gate body upper opening, and the long strip tightness spring is arranged between the support block and the side surface of the long sealing strip.

[0011] Preferably, the air outlet is provided with a high-temperature connecting pipe at one end away from the box body, a heat exchanger is arranged at one end of the high-temperature connecting pipe away from the air outlet, the heat exchanger is communicated with the air outlet through the high-temperature connecting pipe, and a wind volume adjusting valve is arranged at the outlet of the air outlet.

[0012] Preferably, an atomizer is arranged in each small chamber.

[0013] Preferably, the inner air duct partition plate is arranged in the box body, the inner air duct partition plate is fixedly connected with the inner wall of the box body, the inner air duct guide plate is arranged at one side of the inner air duct partition plate, and the top end of the inner air duct guide plate is fixedly connected with the top wall in the box body.

[0014] The present application has the advantages that: the chimney effect working principle is fully utilized, natural ventilation is used to naturally cool the box body in the high-temperature gate, the self-cooling high-temperature gate is provided with an air outlet and an air inlet, the air outlet is higher than the air inlet, a pressure difference is formed in the metal pipe in the gate, the air flow in and out of the chamber is caused, the higher the temperature of the air in the chamber is, the faster the upward speed of the air is, and the better the heat exchange effect is, at this time, a negative pressure area is formed at the original place of the low-density air, then the cold air with low temperature and large specific gravity is sucked from the air inlet, and the air in and out of the chamber flows continuously. The natural ventilation caused by the thermal pressure is called the chimney effect. Because the chimney has a certain height, the hot gas in the chimney is affected by the atmospheric buoyancy, and the negative pressure at the bottom of the chimney is larger, that is, the suction is larger. Meanwhile, the high-temperature gas can be fully utilized, in particular, one coke oven generally needs 90 high-temperature gates, and all the high-temperature flue gas can be used for secondary utilization, so that the energy-saving and emission-reducing effect is achieved. If necessary, the high-temperature gas can be introduced into the heat exchanger through the high-temperature connecting pipe, heat exchange is performed, and the cooled gas is discharged through the induced draft fan. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0016] Figure 1 The present application is a self-cooling high-temperature gate for the prior art castable gate;

[0017] Figure 2 The present application is a self-cooling high-temperature gate for the prior art castable gate; Figure 1 The present application is a self-cooling high-temperature gate for the prior art castable gate;

[0018] Figure 3 The present application is a self-cooling high-temperature gate for the prior art castable gate;

[0019] Figure 4 for Figure 3 A sectional view;

[0020] Figure 5 This is a schematic diagram of the invention installed inside a high-temperature gate;

[0021] Figure 6 for Figure 5 A sectional view;

[0022] Figure 7 This is a cross-sectional view of a self-cooling ultra-high temperature gate.

[0023] Figure 8 for Figure 7 AA section view;

[0024] Figure 9 for Figure 7 BB section view;

[0025] Figure 10 For sealing and tightening drive device;

[0026] Figure 11 for Figure 10 A magnified view of part C;

[0027] Appendix Figure 12 This is a schematic diagram of another embodiment of the present invention.

[0028] Figure label:

[0029] 1. High-temperature gate; 2. High-temperature gate body; 3. Air outlet duct; 4. Support; 5. Drive device; 6. Air volume regulating valve; 7. High-temperature connecting pipe; 8. Heat exchanger; 9. Sealing and tightening device; 10. High-temperature flue; 11. U-shaped pipe; 101. Housing; 102. Air outlet duct; 103. Air inlet duct; 104. Small chamber; 105. Inner air duct guide plate; 106. Inner air duct partition; 107. Air outlet; 108. Air inlet; 109. Atomizer; 110. Downward air duct; 111. Side plate; 112. Bottom plate; 113. Front panel; 114. Fire-resistant layer. 115. Insulation layer; 116. Wear-resistant layer; 117. Connecting part; 201. Upper opening of gate body; 202. Inner groove of gate body; 901. Drive device; 902. Long sealing strip; 903. Short sealing strip; 904. Long strip pretensioner; 905. Tightening crank; 906. Shaft pin one; 907. Shaft pin two; 908. Short strip tension spring; 909. Support block; 910. Long strip limit block; 911. Long strip tension spring; 1101. Low position tube; 1102. High position tube; 1103. Air inlet; 1104. Air outlet; 1105. Lower bend. Detailed Implementation

[0030] 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, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0031] The present application will be further described below with reference to the drawings in the specification.

[0032] The present application provides the following technical solutions:

[0033] As shown in the accompanying Figures 5 to 12 The present application discloses a self-cooling ultrahigh-temperature gate valve applied to a high-temperature flue, which comprises a high-temperature gate body 2, a high-temperature gate plate 1 and a support 4. A box body 101 is formed in the high-temperature gate plate 1. A plurality of chimney cooling structures are arranged in the box body 101. Each of the chimney cooling structures comprises an inner air duct partition plate 106 and an inner air duct guide plate 105. A plurality of air inlet ducts 103 and air outlet ducts 102 are arranged in the box body 101 corresponding to the chimney cooling structures. The air outlet ducts 102 are higher than the air inlet ducts 103. The cold air of the chimney cooling structure enters the box body 101 through the air inlet duct 103 to cool the box body 101 and then is discharged from the air outlet duct 102. In the design, the chimney effect is fully utilized. Natural ventilation cools the box body 101 in the high-temperature gate. The air outlet duct 102 of the self-cooling high-temperature gate plate 1 is higher than the air inlet duct 103. The metal pipe in the high-temperature gate plate 1 forms a pressure difference, which causes the flow of air inside and outside the cavity. The higher the temperature of the air inside the cavity, the faster the air rises. At this time, a negative pressure area is formed in the original place of the low-density air. Then, the cold air with a relatively low temperature and a large specific gravity is sucked from the air inlet 108. The air inside and outside the cavity flows continuously. The natural ventilation caused by the thermal pressure is called the chimney effect. Because the chimney has a certain height, the hot gas in the chimney is affected by the atmospheric buoyancy, which causes a negative pressure at the bottom of the chimney. The greater the difference between the air inlet and the air outlet, the greater the suction force. The higher the temperature in the box body, the greater the suction force formed, and finally the temperature in the box body and the discharge temperature are automatically balanced. At the same time, the high-temperature gas can be fully utilized. In particular, a large number of high-temperature gates are generally required for a horizontal coke oven. The air inlet is adjusted by the air volume regulating valve (6) arranged at the outlet of the air outlet (107) to control the temperature of the discharged hot air to enter the heat exchanger for secondary heat exchange, thereby achieving the effect of energy saving and emission reduction. If necessary, the high-temperature gas can be introduced into the heat exchanger through the high-temperature connecting pipe for heat exchange. After heat exchange, the cooled gas is discharged by the induced draft fan.

[0034] The inner air duct partition plate 106 divides the box 101 into several small chambers 104, the inner air duct guide plate 105 is arranged in each small chamber 104, one end of the inner air duct guide plate 105 is fixed to the top wall of the small chamber 104, the other end of the inner air duct guide plate 105 forms a communication part 117 with the bottom wall of the small chamber 104, the air inlet duct 103 and the air outlet duct 102 are correspondingly arranged on the two sides of the communication part 117, and the atomizer 109 is arranged in each small chamber 104. Specifically, the number of atomizers 109 corresponds to the number of small chambers 104, the atomizer 109 extends into the air inlet duct 103 of the corresponding small chamber 104, atomizes the medium in the air inlet duct 103, and then makes the medium into gas and discharges from the air outlet duct 102. In the design, the atomizer 109 is arranged at the top end of the air inlet duct 103, the atomizer 109 can extend into the air inlet duct 103 from the air inlet 108, or a separate hole is opened at the top end of the air inlet duct 103 to enter the air inlet duct 103, and the atomizer 109 atomizes the medium in the air inlet duct 103, and then makes the medium discharge from the air outlet duct 102.

[0035] Reference is made to the accompanying drawings Figure 12In another embodiment, the high-temperature gate 1 is provided with a U-shaped tube 11, which is provided with a low-position tube 1101 and a high-position tube 1102. The low-position tube 1101 and the high-position tube 1102 are communicated through a lower bend tube 1105. The low-position tube 1101 is provided with an air inlet 1103, and the high-position tube 1102 is provided with an air outlet 1104. The tube opening position of the high-position tube 1102 is higher than that of the low-position tube 1101. Specifically, when the high-temperature flue 10 needs to be cut off, the high-temperature gate 1 needs to be placed in the high-temperature flue 10, and the high-temperature gate 1 is directly contacted with the high-temperature medium. The metal skeleton of the high-temperature gate 1 is basically the same as the temperature of the medium, and if the service life of the high-temperature gate needs to be ensured, the heat-resistant temperature of the metal skeleton must be much higher than the temperature of the medium, and at the same time, the metal material of the metal skeleton must still be within the allowable use temperature range. The commonly used heat-resistant stainless steel 06Cr25Ni20 has the performance of not forming an oxide skin at 1035°C. Since the metal skeleton deforms greatly under high temperature and expands and contracts greatly under heat, and the expansion coefficient of the castable is small, the castable is easily cracked under high temperature. By improving the structure of the metal skeleton, the skeleton is designed as N U-shaped tubes 11, and each U-shaped tube 11 is connected by a tube. The anchor nails required by the castable are welded on the U-shaped tube 11 and the connecting tube. Since the U-shaped tube 11 is composed of a high chimney cooling structure and a low chimney cooling structure, the higher the temperature in the tube, the faster the automatic convection, and the higher the heat exchange efficiency. Part of the heat is automatically taken away by the U-shaped tube 11 under high temperature through the chimney cooling structure, which greatly reduces the heat-resistant temperature required by the U-shaped tube 11, and also reduces the metal expansion, greatly improves the use temperature, and prolongs the service life.

[0036] The box body 101 is provided with a refractory layer 114, which is composed of a heat insulation layer 115 and a wear-resistant layer 116. Specifically, the frame body with the refractory layer and the wear-resistant layer can withstand the heat emitted from the box body 101, and avoid deformation of the frame body. The wear-resistant layer can enhance the wear resistance of the frame body, and avoid damage of the frame body caused by wear between the box body 101 and the frame body during long-term use.

[0037] The support 4 is arranged on the high-temperature gate body 2, and the sealing tightness driving device 901 is arranged on the support 4. Specifically, the sealing tightness driving device 901 is arranged on the support 4, so that the gap between the high-temperature gate plate 1 and the high-temperature gate body 2 can be sealed by the sealing tightness driving device 901 after the high-temperature gate plate 1 is installed into the high-temperature gate body 2, the sealing strip is prevented from being damaged when the gate plate moves up and down, and external air is prevented from entering the high-temperature flue 10 or high-temperature gas in the high-temperature flue 10 from leaking to the outside through the gap between the gate plate and the valve body. The sealing tightness driving device 901 comprises two long sealing strips 902 and two short sealing strips 903, the long sealing strips 902 and the short sealing strips 903 are connected to form a rectangular structure, a tightness crank 905 is arranged between the long sealing strips 902 and the short sealing strips 903, pin shafts 906 are arranged on the long sealing strips 902 and the short sealing strips 903, both ends of the tightness crank 905 are provided with rotating shaft holes corresponding to the pin shafts 906 on the long sealing strips 902 and the short sealing strips 903, the pin shafts 906 extend into the corresponding rotating shaft holes and are connected with the tightness crank 905, and the long sealing strips 902 and the short sealing strips 903 are movably connected through the tightness crank 905. The long sealing strips 902 and the short sealing strips 903 are movably connected through the tightness crank 905, so that the tightness degree between the long sealing strips 902 and the short sealing strips 903 can be adjusted through the tightness crank 905.

[0038] The long sealing strip 902 is further provided with a long strip pre-tightener 904, the long strip pre-tightener 904 comprises a support block 909, a long strip limiting block 910 and a long strip tightness spring 911, the support block 909 is arranged on one side of the long sealing strip 902, the long strip tightness spring 911 is arranged between the support block 909 and the long sealing strip 902, both ends of the long strip tightness spring 911 are connected with the support block 909 and the long sealing strip 902, the long strip limiting block 910 is arranged at the top end of the support block 909, one end of the long strip limiting block 910 is connected with the support block 909, and the other end of the long strip limiting block 910 is fixed on the long sealing strip 902.

[0039] The high-temperature connecting pipe 7 is arranged at one end of the air outlet channel 102 away from the box body 101, the heat exchanger 8 is arranged at one end of the high-temperature connecting pipe 7 away from the air outlet channel 102, the heat exchanger 8 is communicated with the air outlet channel 102 through the high-temperature connecting pipe 7, and the air volume adjusting valve 6 is arranged at the air outlet 107 of the air outlet channel 102. In the design, the atomizer 109 is arranged in the air inlet channel 103 and the air outlet channel 102, and the air volume adjusting valve 6 for adjusting the air volume entering the air inlet channel 103 is arranged in the air inlet channel 103. The air volume is adjusted through the air volume adjusting valve 6, the cold air is exchanged to reach the set temperature, and the heat exchanger is used for the second heat exchange. The heat exchanger generates hot water or steam to be delivered to the next process for use, thereby providing the energy-saving effect.

[0040] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-cooled ultra-high temperature gate valve applied to a high-temperature flue, comprising a high-temperature gate body (2), a high-temperature gate plate (1) and a support (4), characterized in that: The high-temperature gate (1) forms a box (101), and the box (101) is provided with a plurality of chimney cooling structures, each of the chimney cooling structures comprises an inner air duct partition (106) and an inner air duct guide plate (105), the box (101) is provided with an air inlet duct (103) and an air outlet duct (102) corresponding to the chimney cooling structure, the air inlet duct (103) and the air outlet duct (102) are communicated, the air inlet duct (103) is provided with an air inlet (108), the air outlet duct is provided with an air outlet (107), the air outlet (107) is higher than the air inlet (108), the cold air of the chimney cooling structure enters the box (101) through the air inlet (108), cools the box (101), and is discharged from the air outlet (107), the high-temperature gate (2) comprises a gate upper opening (201) and a gate inner groove (202), the high-temperature gate (1) is installed in the gate inner groove (202), a sealing tightness driving device (9) is arranged on the gate upper opening (201) to seal the high-temperature gate (1) and the gate inner groove (202), the sealing tightness driving device (9) comprises a long sealing strip (902), a short sealing strip (903), a tightness crank (905) and a driving device (901), the long sealing strip (902) and the short sealing strip (903) are provided with the tightness crank (905), two sections of the long sealing strip (902) are respectively provided with shaft pins (906), two sections of the short sealing strip (903) are respectively provided with shaft pins (907), the two ends of the tightness crank (905) are connected with the long sealing strip (902) and the short sealing strip (903) through the corresponding shaft pins (906) and shaft pins (907), the driving device (901) is connected with the short sealing strip (903), long strip pretighteners (904) are arranged on the two sides of the long sealing strip (902), and the long strip pretighteners (904) are composed of supporting blocks (909) and long strip tightness springs (911).

2. The self-cooled ultra-high temperature gate valve for high temperature flues according to claim 1, characterized in that: The inner air duct partition (106) divides the box (101) into a plurality of small chambers (104), the inner air duct guide plate (105) is arranged in each small chamber (104), one end of the inner air duct guide plate (105) is fixed to the top wall of the small chamber (104), the other end of the inner air duct guide plate (105) and the bottom wall of the small chamber (104) form a communication part (110), and the air inlet duct (103) and the air outlet duct (102) are arranged on the two sides of the communication part (110).

3. The self-cooled ultra-high temperature gate valve for high temperature flues according to claim 2, characterized in that: The box (101) is provided with a fire-resistant layer (114), and the fire-resistant layer (114) is composed of a heat insulation layer (115) and a wear-resistant layer (116).

4. The self-cooled ultra-high temperature gate valve for high temperature flues according to claim 1, characterized in that: The high-temperature gate plate (1) is provided with a U-shaped pipe (11), the U-shaped pipe (11) is provided with a low pipe (1101) and a high pipe (1102), the low pipe (1101) and the high pipe (1102) are communicated through a lower elbow (1105), the low pipe (1101) is provided with an air inlet (1103), the high pipe (1102) is provided with an air outlet (1104), the pipe opening position of the high pipe (1102) is higher than that of the low pipe (1101), and the U-shaped pipe (11) is externally provided with a refractory layer (114).

5. The self-cooled ultra-high temperature gate valve for high temperature flues according to claim 3, characterized in that: The high-temperature connecting pipe (7) is provided at one end of the air outlet channel (102) away from the box body (101), the heat exchanger (8) is provided at one end of the high-temperature connecting pipe (7) away from the air outlet channel (102), the heat exchanger (8) is communicated with the air outlet channel (102) through the high-temperature connecting pipe (7), and the air volume regulating valve (6) is arranged at the outlet of the air outlet (107) of the air outlet channel (102).

6. The self-cooled ultra-high temperature gate valve for high temperature flues according to claim 2, characterized in that: The small chamber (104) is provided with an atomizer (109).

7. The self-cooled ultra-high temperature gate valve for high temperature flues according to claim 1, characterized in that: The inner air channel partition plate (106) is arranged in the box body (101), the inner air channel partition plate (106) is fixedly connected with the inner wall of the box body, the inner air channel guide plate (105) is arranged on one side of the inner air channel partition plate, and the top end of the inner air channel guide plate (105) is fixedly connected with the top wall in the box body (101).

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