Sand seal

Abstract

The utility model discloses a sand seal cover belongs to jar type calcinator technical field, the utility model discloses a cover body is equipped with the clear furnace guide pipe, the cover body is located the clear furnace guide pipe side part is equipped with the mounting hole of the penetration cover body, one -way valve and flame arrester are installed in proper order to the mounting hole, the utility model discloses realized the sealing of jar type calcinator tank top overflow outlet and the gas guide function when the clear furnace operation, also have the discharge high temperature high pressure flame flow and the flame function of extinguishing, have effectively reduced the security hidden danger that high temperature high pressure flame flow brought to the temperature personnel and equipment, guarantee safe production, the beneficial effect of cost -effective.

Description

Technical Field

[0001] This utility model relates to the field of tank calcining furnace technology, and in particular to a sand seal cover for sealing the overflow port of the tank top of a tank calcining furnace. Background Technology

[0002] Traditional sand seal covers can only seal the overflow outlet at the top of the calcining furnace. In the era of manual furnace cleaning, the sand seal cover is manually opened during furnace cleaning operations, and the furnace cleaning air pipe is inserted into the overflow outlet for cleaning. At the same time, the high-temperature and high-pressure flame is discharged from the overflow outlet.

[0003] Currently, automatic furnace cleaning systems are relatively mature, and most tank-type calcining furnaces have adopted them. However, drawbacks still exist. Existing automatic furnace cleaning systems use sand seals that only provide sealing and venting during cleaning operations, lacking the function of discharging high-temperature, high-pressure flames and extinguishing flames. This results in the high-temperature, high-pressure flames not being discharged at the overflow port during cleaning, but instead being ejected from the first-level temperature control port. These flames reach temperatures exceeding 1000℃ and lengths of approximately 1 meter. The first level of the tank-type calcining furnace is the inspection passage for temperature control personnel and is equipped with numerous temperature control devices. The randomly ejected high-temperature, high-pressure flames pose a significant safety hazard to temperature control personnel and equipment. Therefore, effectively eliminating the safety hazards caused by high-temperature, high-pressure flames has become a crucial problem that urgently needs to be solved by those skilled in the art.

[0004] A new type of sand seal cover that combines the functions of sealing the overflow outlet of the tank-type calcining furnace and guiding gas during furnace cleaning, as well as discharging high-temperature and high-pressure flames and extinguishing flames. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the existing technology and provide a new type of sand seal cover that has both the function of sealing the overflow port of the tank-type calcining furnace and guiding gas during furnace cleaning, as well as the function of discharging high-temperature and high-pressure flame and extinguishing flame.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The sand seal cap disclosed in this utility model includes:

[0008] Cover with furnace cleaning guide pipe installed;

[0009] The cover has a through-hole on the side of the furnace cleaning guide tube, and a one-way valve and a flame suppressor are installed in sequence in the through-hole.

[0010] Furthermore, the flame suppressor is an expanded perforated flame suppressor structure.

[0011] Furthermore, the flame suppressor is a circular tube with an inner diameter larger than the diameter of the mounting hole, and the sidewall of the circular tube has a plurality of first through holes evenly arranged.

[0012] Furthermore, the flame suppressor has a top wall with a second through hole, the second through hole being smaller than the inner diameter of the flame suppressor.

[0013] Furthermore, the check valve is a ball-type check valve.

[0014] Furthermore, the one-way valve includes a valve body, and a valve disc with a hollow ball structure is installed inside the valve body.

[0015] Furthermore, the valve body has a conical tube structure, and the end of the valve body with a larger diameter is fixedly connected to the flame suppressor.

[0016] Furthermore, the cover is made of cast iron.

[0017] In the above technical solution, the sand seal cap provided by this utility model has the following advantages:

[0018] The sand seal cover designed in this utility model has a through mounting hole on its body. A one-way valve and a flame suppressor are installed sequentially through the mounting hole on the outside of the cover body. Thus, the sand seal cover has the functions of guiding gas, discharging high-temperature and high-pressure flames, and suppressing flames during furnace cleaning operations. The sand seal cover has the following beneficial effects:

[0019] The high-temperature, high-pressure flame is discharged through a one-way valve and a flame suppressor installed on the sand seal cover of the overflow outlet at the top of the calcining furnace. This eliminates the possibility of the high-temperature, high-pressure flame being ejected from the first-layer temperature control port during furnace cleaning operations, effectively reducing the safety hazards to temperature control personnel and equipment caused by the high-temperature, high-pressure flame, ensuring safe production, and saving costs. In addition, the flame suppressor effectively reduces the flame velocity and length, further reducing safety hazards. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the sand seal cover disclosed in this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Cover body; 2. Cleaning guide pipe; 3. Valve disc; 4. One-way valve; 5. Flame extinguisher; 6. First through hole; 7. Second through hole. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] See Figure 1 As shown;

[0026] A utility model sand seal cover includes: a cover body 1; a furnace cleaning guide pipe 2; a one-way valve 4; and a flame suppressor 5.

[0027] The cover body 1 is the main structure of the sand seal cover, made of cast iron. The cover body 1 seals the overflow port of the top of the calcining furnace by its own weight, preventing external air from entering the furnace body through the overflow port, and also supports the installation and fixing of other components.

[0028] The furnace cleaning guide 2 penetrates the cover body 1. One end of the furnace cleaning guide 2 is connected to an external high-pressure air source. During the furnace cleaning operation, high-pressure air enters the furnace body of the tank calcining furnace through the furnace cleaning guide 2 to purge the accumulated combustion residues in the furnace body. The furnace cleaning guide 2 can be made of cast iron pipe, cast steel pipe or seamless steel pipe, etc. The furnace cleaning guide 2 and the cover body 1 can be fixedly connected by welding, interference fit or flange using bolts, etc.

[0029] Among them, the cover 1 has a through mounting hole on the side of the furnace cleaning guide tube 2, and a one-way valve 4 is fixed to the outside of the cover 1. The end of the one-way valve 4 away from the cover 1 is connected to a flame suppressor 5.

[0030] The one-way valve 4 is a ball-type one-way valve. The one-way valve 4 includes a valve disc 3 and a valve body. The valve body has a conical tube structure. The end of the valve body with a larger diameter is fixedly connected to the flame suppressor 5. The valve disc 3 with a hollow ball structure is installed in the valve body. The diameter of the valve disc 3 is larger than the smaller diameter end of the conical valve body and smaller than the larger diameter end. When it is open, the high temperature and high pressure flame will push the valve disc 3 upward, and the one-way valve 4 will open. When it is closed, after the high temperature and high pressure flame disappears, the valve disc 3 loses its thrust. Then, its own gravity will cause the valve disc 3 to fall down and block the valve body, and the one-way valve 4 will close.

[0031] During normal operation, the one-way valve 4 closes the mounting hole on the sealing cover 1. During furnace cleaning, it is opened to discharge high-temperature and high-pressure flame. The valve body and the cover 1 are fixedly connected by bolts through a flange. The one-way valve 4 can also be other types of one-way valves. In this embodiment, a ball-type one-way valve is used as an example.

[0032] The flame suppressor 5 is an expanded open-hole type flame suppressor structure, which can effectively reduce the length of high-temperature and high-pressure flame flow. The flame suppressor 5 is connected to the one-way valve 4 and is fixed to the top of the valve body of the one-way valve 4 by bolts. Specifically, the flame suppressor 5 is a round tube with an inner diameter larger than the diameter of the mounting hole. Several first through holes 6 are evenly arrayed on the side wall of the round tube. The flame suppressor 5 has a top wall with a second through hole 7. The second through hole 7 is smaller than the inner diameter of the flame suppressor 5, thus forming an expanded open-hole type flame suppressor structure.

[0033] Specific implementation examples:

[0034] The cover body 1 is made of cast iron and is formed by casting. The outer diameter of the cover body 1 is [missing information]. Inner diameter is Total height is 50, cap thickness is 15, and cap opening is [missing information]. and Each has one mounting hole for installing the furnace cleaning guide pipe 2 and the one-way valve 4, respectively;

[0035] The furnace cleaning guide pipe 2 is made of carbon steel pipe using a welding process, and the outer diameter of the steel pipe is [missing information]. The wall thickness is 2, and it is connected to the cover body 1 by a welded flange.

[0036] The one-way valve 4 has a valve body made of carbon steel using a machining process, and the outer diameter of the bottom of the valve body is [missing information]. Top outer diameter is The wall thickness is 2mm, and the mounting holes on the valve body and cover 1 are connected by threads; the valve disc 3 of the one-way valve 4 is a hollow stainless steel ball, and the outer diameter of the valve disc 3 is... The wall thickness is 1.

[0037] Flame suppressor 5 is made of carbon steel pipe and manufactured through welding and machining processes. The outer diameter of flame suppressor 5 is [missing information]. The wall thickness is 2, and the outer diameter of the top port is Inner diameter is The thickness is 2, and the diameter of the circumferential opening of the flame suppressor is 5. There are 60 units, evenly distributed. The bottom end of the flame suppressor 5 is fixedly connected to the top end of the valve body of the one-way valve 4 by a thread. The top end of the flame suppressor 5 has a top wall, and the top wall has a through hole with a diameter smaller than the inner diameter of the flame suppressor 5.

[0038] The application effect is good. During the furnace cleaning operation, the high temperature and high pressure flame is discharged through the sand seal cover one-way valve 4 and flame suppressor 5, and no longer sprayed out through the first layer temperature control port. The flame length is reduced to about 20cm.

[0039] In the above technical solution, the sand seal cap provided by this utility model has the following advantages:

[0040] 1) First, the high-temperature and high-pressure flame is discharged through the one-way valve and flame suppressor installed on the sand seal cover of the overflow port on the top of the calciner, which eliminates the occurrence of the high-temperature and high-pressure flame being ejected from the first-layer temperature control port during furnace cleaning operations, effectively reducing the safety hazards to temperature control personnel and equipment caused by the high-temperature and high-pressure flame.

[0041] 2) Secondly, the flame suppressor effectively reduces the flame velocity and length, further reducing safety hazards.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. Sand seal cap, including: The cover (1) equipped with a furnace cleaning guide pipe (2) is characterized in that: The cover (1) has an installation hole that penetrates the cover on the side of the furnace cleaning guide tube (2), and a one-way valve (4) and a flame suppressor (5) are installed in sequence in the installation hole.

2. The sand seal cap according to claim 1, characterized in that: The flame suppressor (5) is an expanded open-hole type flame suppressor structure.

3. The sand seal cap according to claim 2, characterized in that: The flame suppressor (5) is a round tube with an inner diameter larger than the diameter of the mounting hole, and the sidewall of the round tube has a number of first through holes (6) arranged in a uniform array.

4. The sand seal cap according to claim 3, characterized in that: The flame suppressor (5) has a top wall with a second through hole (7) provided in the top wall. The second through hole (7) is smaller than the inner diameter of the flame suppressor (5).

5. The sand seal cap according to claim 2, characterized in that: The one-way valve (4) is a ball-type one-way valve.

6. The sand seal cap according to claim 5, characterized in that: The one-way valve (4) includes a valve body, and a valve disc (3) with a hollow ball structure is installed in the valve body.

7. The sand seal cap according to claim 6, characterized in that: The valve body is a conical tube structure, and the end of the valve body with a larger diameter is fixedly connected to the flame suppressor (5).

8. The sand seal cap according to any one of claims 1-7, characterized in that: The cover (1) is made of cast iron.

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