A heat-insulating and anti-scorching high-temperature resistant explosion relief valve, its manufacturing method and explosion relief method

Abstract

The present invention belongs to the technical field of safety equipment for coal gas purification and recovery systems, and specifically relates to an insulated and anti-scorching high-temperature resistant explosion relief valve, and a manufacturing and explosion relief method. The present invention is organically composed of a spring device, a guide rod, a spring fixing frame, an explosion relief valve cover and a valve seat; a sealing groove for accommodating a sealing and heat-insulating component is provided on the valve seat; each guide rod is fixed in the valve seat by a flange; an insulating coating, a ceramic fiber module and a guide plate are provided on the lower surface of the explosion relief valve cover from the inside to the outside; and threaded holes are preset on the lower surface of the explosion relief valve cover. In the normal sealing state, the explosion relief valve cover is closed under the action of its own weight and the compression force of the ceramic fiber module, and the nano-insulation pad blocks the heat conduction of the high-temperature medium to the sealing ring, thereby avoiding the precipitation of tar. The present invention solves the contradiction between the failure of the sealing material due to high-temperature carbonization and the blockage of the cooling pipeline due to tar condensation through the synergistic effect of the nano-insulation pad and the tungsten carbide ceramic insulation coating in the existing explosion relief valve.

Description

Technical Field

[0001] The present invention belongs to the technical field of safety equipment for coal gas purification and recovery systems, and in particular relates to a heat-insulating and anti-scorching high-temperature resistant explosion relief valve, and a manufacturing and explosion relief method. Background Art

[0002] Coal gas generated by equipment such as ironmaking blast furnaces, steelmaking converters, coke ovens, and gasifiers must undergo purification and recovery systems to meet environmental protection requirements and energy reuse needs. Electrostatic precipitators (ESPs), a key component of these systems, charge dust particles in the gas through high-voltage discharges and capture them using the electric field, significantly reducing the gas's dust content. However, ESPs face serious safety hazards in actual operation: when the oxygen content in the gas exceeds the safety threshold (typically 0.8%-1.2%) due to process fluctuations or equipment leaks, the sparks generated during the high-voltage discharge can easily trigger a gas explosion, resulting in equipment damage, production interruptions, and even casualties.

[0003] In response to this problem, some technical solutions have proposed installing an explosion relief device on the electrostatic precipitator. Since the coal gas entering the precipitator is a high-temperature medium, the supporting device must be resistant to high temperatures. The structural heat resistance of traditional high-temperature explosion relief valves mainly relies on the inherent characteristics of their sealing rings. The sealing material is easily carbonized under high temperatures for a long time and cannot meet the high-temperature resistance requirements. Later, a technology proposed to install a circulating cooling water pipeline at the bottom of the sealing ring and the abutment part of the valve plate for cooling to reduce the direct heat conduction of the high-temperature medium to the sealing ring and indirectly cool the sealing ring. However, this technology may cause the temperature of the explosion relief valve or pipeline to be lower than the tar dew point, causing the tar vapor to condense and precipitate, condense and adhere to the metal surface, form sticky deposits, and even block the explosion relief channel. Summary of the Invention

[0004] The present invention provides a heat-insulating and scorch-proof high-temperature resistant explosion relief valve, a manufacturing method and an explosion relief method. Its purpose is to provide a device and method that can effectively isolate high-temperature flue gas and prevent the precipitation of tar vapor, so as to solve the contradiction between the high-temperature carbonization failure of the sealing material of the existing explosion relief valve and the condensation and blockage of the cooling pipeline due to tar.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A heat-insulating and anti-scorching high-temperature resistant explosion-relief valve, comprising at least a spring device, a guide rod and a spring fixing frame; the spring device is connected to the spring fixing frame; a plurality of guide rods are provided, the plurality of guide rods are arranged vertically, and the upper part of each guide rod is connected to the spring fixing frame; it also comprises an explosion-relief valve cover and a valve seat; a sealing groove is provided on the valve seat, and a sealing and heat-insulating component is provided in the sealing groove; each guide rod is fixed to the valve seat by a flange; on the lower surface of the explosion-relief valve cover, a heat-insulating coating, a ceramic fiber module and a guide plate are provided in sequence from the inside to the outside; and a threaded hole is preset on the lower surface of the explosion-relief valve cover.

[0007] A self-lubricating guide sleeve is sleeved on the outer wall of the guide rod, and the self-lubricating guide sleeve is fixedly connected to the explosion relief valve cover. When the explosion is relieved, the self-lubricating guide sleeve slides along the guide rod as the explosion relief valve cover opens; one end of the guide rod is fixed on the valve seat, and the other end is fixed on the spring fixing frame.

[0008] Anchors for fixing the ceramic fiber module to the explosion relief valve cover and the guide plate are provided in the ceramic fiber module to avoid metal heat conduction; the guide plate and the ceramic fiber module are elastically matched.

[0009] The ceramic fiber module is a prefabricated folding module of a ceramic fiber needle-punched blanket. After elastic compression, it can deform and release airflow during explosion relief, and automatically reset and seal after pressure relief. The internal pre-compression amount is 15%-20% of the initial thickness.

[0010] The sealing and heat-insulating assembly comprises a nano-heat-insulating pad and a sealing ring; the nano-heat-insulating pad is bonded to the outer layer of the sealing ring through high-temperature silicone adhesive.

[0011] The nano thermal insulation pad is a composite of nano aerogel and ceramic fiber composite material; the nano aerogel is silicon dioxide nano aerogel, aluminum oxide nano aerogel or silicon carbide nano aerogel; the ceramic fiber composite material is mullite fiber, high-purity aluminum silicate fiber or zirconium oxide fiber.

[0012] The thickness of the nano thermal insulation pad is 3-5 mm.

[0013] The thermal insulation coating is a high-temperature resistant tungsten carbide ceramic thermal insulation coating; the thickness of the tungsten carbide ceramic thermal insulation coating is 0.3-0.5 mm.

[0014] A method for manufacturing a heat-insulating, scorch-proof, high-temperature resistant explosion relief valve, using the heat-insulating, scorch-proof, high-temperature resistant explosion relief valve, comprising the following steps:

[0015] Step 1: Prepare and connect the sealing and thermal insulation components;

[0016] Cut the nano thermal insulation pad into a ring shape, overlap it with the sealing ring, and then embed it into the sealing groove set on the valve seat. Use high-temperature silicone adhesive to bond them together. The curing temperature is 190-210℃ and the curing time is 2h.

[0017] Step 2: Processing into ceramic fiber modules;

[0018] Prefabricate into folding modules according to preset structure and size; during processing, maintain 15%-20% compression of initial thickness;

[0019] Step 3: spraying tungsten carbide ceramic insulation coating on the explosion relief valve cover;

[0020] The surface of the explosion relief valve cover is sandblasted, and then a tungsten carbide ceramic insulation coating is sprayed using thermal spraying technology, covering the surface of the explosion relief valve cover with a thickness of not less than 1mm;

[0021] Step 4: Connect the ceramic fiber module;

[0022] Attach the pre-compressed ceramic fiber module to the lower surface of the explosion relief valve cover; use anchors to penetrate the pre-buried threaded holes on the explosion relief valve cover from the inside of the ceramic fiber module, and control the torque to 8-10N·m.

[0023] A method for venting an explosion of a heat-insulating and scorch-proof high-temperature resistant explosion-relief valve, using a heat-insulating and scorch-proof high-temperature resistant explosion-relief valve, the specific method is as follows:

[0024] When the system pressure exceeds the threshold, the impact of the explosion causes the ceramic fiber module to be compressed and deformed, and the airflow is guided by the guide plate to quickly relieve the pressure and discharge. After the pressure is relieved, the ceramic fiber module elastically recovers to its initial compressed state and re-forms the seal. When the threshold is further over-pressured, the airflow will first push the valve cover upward along the guide rod, pushing the spring device upward, causing the airflow to quickly release and the air pressure in the equipment to drop.

[0025] Beneficial effects:

[0026] 1. When the present invention is in a normal sealing state, the explosion relief valve cover is closed under the action of its own weight and the compression force of the ceramic fiber module. The nano thermal insulation pad blocks the heat conduction from the high-temperature medium to the sealing ring. The sealing surface temperature is ≤200°C, preventing tar precipitation.

[0027] 2. The ceramic fiber module of the present invention maintains a compression amount of 15%-20% of the initial thickness and fills the internal space of the valve cavity, forming a thicker thermal insulation layer to protect the internal metal structure and spring device, providing excellent thermal insulation, high temperature resistance and thermal shock resistance.

[0028] 3. The high-temperature resistant tungsten carbide ceramic insulation coating of the present invention is coated on the metal surface of the explosion relief valve cover directly exposed to the high-temperature coal gas in the furnace, providing a hard, wear-resistant, high-temperature oxidation-resistant and coal gas corrosion-resistant protective layer, significantly reducing the temperature of the base metal and extending the life of the component.

[0029] 4. The anchor used in the present invention is set in the ceramic fiber module. It penetrates from the inside of the ceramic fiber module into the pre-buried threaded hole of the explosion relief valve cover. The torque is controlled at 8-10N·m to avoid damage to the module caused by excessive compression.

[0030] 5. Compared with traditional thermal insulation materials, the thermal insulation performance of the sealed thermal insulation component of the present invention can be improved by several to ten times at the same thickness. It can strongly block heat radiation and conduction, and significantly reduce the heat transferred to the spring device and external structure.

[0031] 6. The pre-compression of the ceramic fiber module in the present invention can eliminate cold voids, improve thermal conductivity, and effectively protect the spring from high-temperature creep. At the same time, it solves the interference caused by thermal expansion of traditional insulation materials on the spring system, thereby significantly improving the stability of spring performance, movement accuracy and service life.

[0032] 7. The ceramic fiber module of the present invention automatically resets after elastic explosion relief, which simplifies the maintenance operation process.

[0033] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 It is the front view of the present invention;

[0036] Figure 2 A top view of the present invention;

[0037] Figure 3 It is a production flow chart of the present invention.

[0038] In the figure: 1. Spring device; 2. Guide rod; 3. Spring fixing bracket; 4. Explosion relief valve cover; 5. Self-lubricating guide sleeve; 6. Valve seat; 7. Sealing ring; 8. Nano thermal insulation pad; 9. Thermal insulation coating; 10. Ceramic fiber module; 11. Guide plate; 12. Anchor; 13. Sealing groove. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] Example 1:

[0041] according to Figure 1-Figure 3 The illustrated embodiment of an insulated, anti-scorching, high-temperature resistant explosion-relief valve comprises at least a spring device 1, a guide rod 2 and a spring fixing frame 3; the spring device 1 is connected to the spring fixing frame 3; a plurality of guide rods 2 are provided, the plurality of guide rods 2 are arranged vertically, and the upper part of each guide rod 2 is connected to the spring fixing frame 3; the embodiment also comprises an explosion-relief valve cover 4 and a valve seat 6; a sealing groove 13 is provided on the valve seat 6, and a sealing and heat-insulating component is provided in the sealing groove 13; each guide rod 2 is fixed in the valve seat 6 by a flange; on the lower surface of the explosion-relief valve cover 4, an insulating coating 9, a ceramic fiber module 10 and a guide plate 11 are provided in sequence from the inside to the outside; a threaded hole for connecting with the ceramic fiber module 10 is preset on the lower surface of the explosion-relief valve cover 4.

[0042] In actual use, in the normal sealing state, the explosion relief valve cover 4 closes under the action of its own weight and the compression force of the ceramic fiber module 10. The sealing and thermal insulation components block heat conduction, and the sealing surface temperature is ≤200°C, preventing tar precipitation. During explosion relief, the explosion relief valve faces upward, forming a channel between the explosion relief valve cover 4 and the valve seat 6. The exposed surface on the upper part of the valve seat 6 serves as the sealing surface.

[0043] When the system pressure exceeds the threshold, the impact of the explosion causes the ceramic fiber module 10 to be compressed and deformed, and the airflow is guided by the guide plate 11 to quickly release the pressure and discharge; after the pressure is released, the ceramic fiber module 10 elastically recovers to its initial compressed state and re-forms the seal; when the threshold is further exceeded, the airflow will first push the explosion relief valve cover 4 upward along the guide rod 2, pushing the spring device 1 upward, causing the airflow to be quickly released and the air pressure in the equipment to drop.

[0044] The guide rods 2 in this embodiment are made of stainless steel, and there are 8 guide rods in total.

[0045] The spring fixing frame 3 in this embodiment is of prior art and is annular, so that the guide rods 2 can be conveniently arranged in an annular shape.

[0046] In some embodiments, a self-lubricating guide sleeve 5 is sleeved on the outer wall of the guide rod 2, and the self-lubricating guide sleeve 5 is fixedly connected to the explosion-relief valve cover 4. When the explosion is released, the self-lubricating guide sleeve 5 slides along the guide rod 2 as the explosion-relief valve cover 4 opens; one end of the guide rod 2 is fixed on the valve seat 6, and the other end is fixed to the spring fixing frame 3 with a high-strength nut.

[0047] In some embodiments, the ceramic fiber module 10 is provided with an anchor 12 for passing through the thermal insulation coating 9 to fix the ceramic fiber module 10 to the explosion relief valve cover 4 and the guide plate 11 to avoid metal heat conduction; the guide plate 11 and the ceramic fiber module 10 are elastically matched.

[0048] Furthermore, the ceramic fiber module 10 is a prefabricated folding module of a ceramic fiber needle-punched blanket, which can be deformed to release airflow during explosion after elastic compression, and automatically reset and seal after pressure relief; the internal pre-compression amount is 15%-20% of the initial thickness.

[0049] In actual use, during the explosion relief process, when system pressure exceeds a threshold, the explosive force compresses and deforms the ceramic fiber module 10, causing the airflow to rapidly release pressure through the deflector 11. After pressure relief, the ceramic fiber module 10 elastically returns to its initial compressed state, re-establishing a seal. If the threshold pressure exceeds the threshold further, the airflow will first push the explosion relief valve cover 4 upward along the guide rod 2, pushing the spring assembly 1 upward, causing the airflow to rapidly release and the air pressure within the device to drop.

[0050] The ceramic fiber module 10 fills the inner space of the valve cavity to form a thicker thermal insulation layer, protecting the internal metal structure and spring area, and providing excellent thermal insulation, high temperature resistance and thermal shock resistance.

[0051] The guide plate 11 in this embodiment adopts the existing technology.

[0052] In some embodiments, the nano thermal insulation pad 8 is a composite of nano aerogel and ceramic fiber composite material; the nano aerogel is made of silica nano aerogel, alumina nano aerogel or silicon carbide nano aerogel; the ceramic fiber composite material is made of mullite fiber, high-purity aluminum silicate fiber or zirconium oxide fiber; the nano thermal insulation pad 8 is bonded to the outer layer of the sealing ring 7 by high-temperature silicone glue.

[0053] Furthermore, the thickness of the nano thermal insulation pad 8 is 3-5 mm.

[0054] The present invention adds a layer of nano thermal insulation pad 8 to the outer layer of the sealing ring 7, which effectively isolates the direct heat conduction of the high-temperature medium to the sealing ring 7, thereby improving its high-temperature resistance and reliable sealing performance.

[0055] The sealing assembly in the present invention is a nano-insulation pad 8 cut into a ring shape, superimposed with a sealing ring 7, and then embedded in a sealing groove 13 provided on the valve seat 6. The pad is bonded using high-temperature silicone adhesive, with a curing temperature of approximately 200°C for 2 hours. The nano-insulation pad 8 is made of a composite material of nano-aerogel and ceramic fiber, with a thickness of approximately 3-5mm. Compared to traditional insulation materials, the nano-insulation pad 8 can improve thermal insulation performance by several to ten times at the same thickness. It can effectively block thermal radiation and conduction, significantly reducing the amount of heat transferred to the spring assembly and external structure.

[0056] In some embodiments, the thermal insulation coating 9 is a high-temperature resistant tungsten carbide ceramic thermal insulation coating; the thickness of the tungsten carbide ceramic thermal insulation coating is 0.3 to 0.5 mm.

[0057] In actual use, the function of the thermal insulation coating 9 is to isolate high temperature and corrosive environment, so the larger the thickness, the better. However, since the material used in the tungsten carbide ceramic thermal insulation coating is relatively expensive, its thickness can only meet the requirements of high temperature isolation and corrosion resistance.

[0058] Example 2:

[0059] Reference Figure 1-Figure 3 A method for manufacturing a heat-insulating, scorch-proof, high-temperature resistant explosion relief valve, using the heat-insulating, scorch-proof, high-temperature resistant explosion relief valve, comprising the following steps:

[0060] Step 1: Prepare and connect the sealing and thermal insulation components;

[0061] Cut the nano thermal insulation pad 8 into a ring shape, overlap it with the sealing ring 7, and then embed it into the sealing groove 13 provided on the valve seat 6. Use high-temperature silicone adhesive to bond them together. The curing temperature is 190-210℃ and the curing time is 2h.

[0062] Step 2: Processing into ceramic fiber module 10;

[0063] Prefabricate into folding modules according to preset structure and size; during processing, maintain 15%-20% compression of initial thickness;

[0064] Step 3: spraying tungsten carbide ceramic insulation coating on the explosion relief valve cover 4;

[0065] The surface of the explosion relief valve cover 4 is sandblasted, and then a tungsten carbide ceramic thermal insulation coating is sprayed using a thermal spraying technique to cover the surface of the explosion relief valve cover 4. The thickness of the tungsten carbide ceramic thermal insulation coating is 0.3 to 0.5 mm.

[0066] Step 4: Connect the ceramic fiber module 10;

[0067] The pre-compressed ceramic fiber module 10 is attached to the lower surface of the explosion relief valve cover 4; the anchor 12 is passed from the inside of the ceramic fiber module 10 into the pre-buried threaded hole on the explosion relief valve cover 4, and the torque is controlled at 8-10 N·m.

[0068] The ceramic fiber module 10 maintains a certain percentage of compression during the processing, which makes it have excellent elasticity in the compression direction. When a gas explosion occurs in the equipment, the hot gas pushes upward against the guide plate 11 made of stainless steel, and the ceramic fiber module 10 is compressed, causing the airflow to escape quickly. After the explosion relief valve releases pressure, the air pressure in the equipment drops, and the ceramic fiber module 10 quickly falls back to its original pre-tightened state, continuing to maintain a reliable sealing effect. Through the synergistic effect of thermal insulation and elastic compensation, the metal fatigue phenomenon of the explosion relief valve cover 4 is reduced, while the reliability and stability of the sealing performance can also be guaranteed, simplifying the structure of the explosion relief valve, reducing costs and maintenance difficulties.

[0069] The pre-compression of the ceramic fiber module 10 of the present invention can eliminate cold voids, improve thermal conductivity, and effectively protect the spring in the spring device 1 from high-temperature creep. At the same time, it solves the interference caused by thermal expansion of traditional insulation materials on the spring system, thereby significantly improving the stability of spring performance, movement accuracy and service life.

[0070] The sandblasting and thermal spraying techniques used in this embodiment are both existing technologies.

[0071] Example 3:

[0072] Reference Figure 1-Figure 3 , a method for venting an explosion of an adiabatic and scorch-proof high-temperature resistant explosion relief valve, using an adiabatic and scorch-proof high-temperature resistant explosion relief valve, the specific method is as follows:

[0073] When system pressure exceeds the threshold, the impact of the explosion compresses and deforms the ceramic fiber module 10, directing the airflow through the guide plate 11 for rapid pressure relief. After pressure relief, the ceramic fiber module 10 elastically returns to its initial compressed state, re-establishing a seal. When the threshold pressure exceeds the threshold further, the airflow first pushes the explosion relief valve cover 4 upward along the guide rod 2, pushing the spring device 1 upward, rapidly releasing the airflow and reducing the air pressure within the device. In the normal sealing state, the explosion relief valve cover 4 closes under the action of its own weight and the compression force of the ceramic fiber module 10. The nano-insulation pad 8 blocks heat transfer from the high-temperature medium to the sealing ring 7, maintaining a sealing surface temperature of ≤200°C and preventing tar precipitation.

[0074] During the explosion relief process, the guide plate 11 made of stainless steel can guide the direction of the airflow when the high-pressure and high-temperature gas is ejected at high speed, preventing the high-speed dust-laden airflow from directly impacting the ceramic fiber module 10, anchor 12, guide rod 2, self-lubricating guide sleeve 5 and other key components on the insulated and anti-scorching high-temperature explosion relief valve, preventing erosion damage, and at the same time may help to form a smooth discharge channel.

[0075] Example 4:

[0076] Control experiment.

[0077] The thermal insulation effect of Nano Thermal Insulation Pad 8 was tested using a control method (Group A with nano-insulation pads on the surface, Group B without). The surface of the media was heated using a flame spray gun to simulate high-temperature flue gas, and the surface temperature was measured in real time. The results showed that when the surface of the media was heated for the same time, the surface temperature of Group A reached approximately 350°C, while that of Group B was approximately 150°C. This demonstrates that Nano Thermal Insulation Pad 8 has excellent thermal insulation properties, effectively slowing the aging of sealed media, extending service life, improving sealing performance, and preventing tar precipitation.

[0078] In the absence of conflicts, those skilled in the art may combine the relevant technical features in the above examples according to actual circumstances to achieve corresponding technical effects. Specific descriptions of various combinations are omitted here.

[0079] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0080] The above descriptions are merely preferred embodiments of the present invention. The present invention is not limited to these embodiments, but is intended to conform to the broadest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A heat-insulating, anti-scorching, high-temperature resistant explosion relief valve, comprising at least a spring device (1), a guide rod (2) and a spring fixing frame (3); the spring device (1) is connected to the spring fixing frame (3); a plurality of guide rods (2) are provided, the plurality of guide rods (2) are arranged vertically, and the upper portion of each guide rod (2) is connected to the spring fixing frame (3); the characteristics are: It also includes an explosion relief valve cover (4) and a valve seat (6); a sealing groove (13) is provided on the valve seat (6), and a sealing heat insulation component is provided in the sealing groove (13); each guide rod (2) is fixed in the valve seat (6) through a flange; a heat insulation coating (9), a ceramic fiber module (10) and a guide plate (11) are provided on the lower surface of the explosion relief valve cover (4) from the inside to the outside; a threaded hole is preset on the lower surface of the explosion relief valve cover (4); An anchor (12) for fixing the ceramic fiber module (10) to the explosion relief valve cover (4) and the guide plate (11) is provided in the ceramic fiber module (10) to avoid metal heat conduction; the guide plate (11) and the ceramic fiber module (10) are elastically matched; The ceramic fiber module (10) is a prefabricated folding module of a ceramic fiber needle-punched blanket, which can be deformed and release airflow during explosion relief after elastic compression, and automatically reset and seal after pressure relief; the internal pre-compression amount is 15%-20% of the initial thickness; after deformation and release of airflow during explosion relief, it elastically recovers to the initial compressed state; The sealing and heat-insulating assembly comprises a nano-insulation pad (8) and a sealing ring (7); the nano-insulation pad (8) is bonded to the outer layer of the sealing ring (7) by means of high-temperature silicone adhesive.

2. The heat-insulating, anti-scorching, high-temperature resistant explosion relief valve according to claim 1, characterized in that: A self-lubricating guide sleeve (5) is sleeved on the outer wall of the guide rod (2), and the self-lubricating guide sleeve (5) is fixedly connected to the explosion relief valve cover (4); when the explosion relief valve cover (4) is opened, the self-lubricating guide sleeve (5) slides along the guide rod (2); one end of the guide rod (2) is fixed on the valve seat (6), and the other end is fixed on the spring fixing frame (3).

3. The heat-insulating, anti-scorching, high-temperature resistant explosion relief valve according to claim 1, characterized in that: The nano thermal insulation pad (8) is a composite of nano aerogel and ceramic fiber composite material; the nano aerogel is silicon dioxide nano aerogel, aluminum oxide nano aerogel, or silicon carbide nano aerogel; the ceramic fiber composite material is mullite fiber, high-purity aluminum silicate fiber, or zirconium oxide fiber.

4. The heat-insulating, anti-scorching, high-temperature resistant explosion relief valve according to claim 1 or 3, characterized in that: The thickness of the nano thermal insulation pad (8) is 3-5 mm.

5. The heat-insulating and anti-scorching high-temperature resistant explosion relief valve according to claim 1, characterized in that: The thermal insulation coating (9) is a high-temperature resistant tungsten carbide ceramic thermal insulation coating; the thickness of the tungsten carbide ceramic thermal insulation coating (9) is 0.3-0.5 mm.

6. A method for manufacturing a heat-insulating and anti-scorching high-temperature resistant explosion relief valve, characterized by: The method of using the heat-insulating and anti-scorching high-temperature explosion-proof valve according to any one of claims 1 to 5 comprises the following steps: Step 1: Prepare and connect the sealing and thermal insulation components; The nano thermal insulation pad (8) is cut into a ring shape, overlapped with the sealing ring (7), and then embedded into the sealing groove (13) provided on the valve seat (6). The nano thermal insulation pad (8) is bonded using high-temperature silicone adhesive with a curing temperature of 190-210°C and a curing time of 2 hours. Step 2: Processing into a ceramic fiber module (10); Prefabricate into folding modules according to preset structure and size; during processing, maintain 15%-20% compression of initial thickness; Step 3: spraying a tungsten carbide ceramic thermal insulation coating (9) on the explosion relief valve cover (4); The surface of the explosion relief valve cover (4) is sandblasted, and then a tungsten carbide ceramic thermal insulation coating (9) is sprayed using a thermal spraying technique, covering the surface of the explosion relief valve cover (4) with a thickness of not less than 1 mm; Step 4: Connect the ceramic fiber module (10); The pre-compressed ceramic fiber module (10) is attached to the lower surface of the explosion relief valve cover (4); and an anchoring piece (12) is used to penetrate the pre-buried threaded hole on the explosion relief valve cover (4) from the inside of the ceramic fiber module (10), with the torque being controlled at 8-10 N·m.

7. An explosion relief method for a heat-insulating and anti-scorching high-temperature resistant explosion relief valve, characterized by: The specific method of using the heat-insulating and anti-scorching high-temperature explosion-proof valve as described in claims 1-5 is as follows: When the system pressure exceeds the threshold, the impact of the explosion causes the ceramic fiber module (10) to be compressed and deformed, and the airflow is guided by the guide plate (11) to quickly release the pressure and discharge the air; after the pressure is released, the ceramic fiber module (10) elastically recovers to the initial compressed state and re-forms the seal; when the threshold is further over-pressured, the airflow will first push the explosion relief valve cover (4) along the guide rod (2) to push the spring device (1) upward, so that the airflow is quickly released and the air pressure in the equipment drops.

Images