Wear-resistant and temperature-resistant coke tank

Abstract

The utility model discloses a kind of wear-resistant temperature-resistant coke cans, including tank body and bottom gate (1), the tank body is divided into upper section (2), straight section (3) and taper section (4) from top to bottom, the upper section (2), straight section (3), taper section (4) and bottom gate (1) are all by shell layer and inner lining layer constitute;Upper section shell layer is welded with the shell layer of straight section, the shell layer of straight section is welded with the shell layer of taper section, the shell layer of taper section is hinged with bottom gate shell layer;The inner lining layer of upper section and the inner lining layer of bottom gate are made of high-temperature wear-resistant lining plate;The inner lining layer of straight section and the inner lining layer of taper section are made of high-temperature erosion-resistant castable.The utility model discloses a kind of wear-resistant temperature-resistant coke cans, simple structure, good stability, high reliability, shell temperature control is within 200 ℃, shell will not occur red deformation, crack and burn loss, inner lining will not crack and fall off, upper section will not appear refractory lining of refractory lining fall off, bottom gate place will not leave coke and occur coke problem.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical coking technology, specifically relating to a wear-resistant and temperature-resistant coke pot. Background Technology

[0002] Dry quenching, as opposed to wet quenching, refers to a quenching method that uses inert gas to cool red-hot coke. In the dry quenching process, red-hot coke is loaded into the dry quenching furnace from the top. Low-temperature inert gas is blown into the red-hot coke layer in the cooling section of the furnace by a circulating fan, absorbing the sensible heat of the coke. The cooled coke is discharged from the bottom of the furnace. High-temperature inert gas exiting the furnace's annular flue flows through the dry quenching boiler for heat exchange, generating steam. The cooled inert gas is then blown back into the furnace by the circulating fan, thus circulating the inert gas within a closed system. Dry quenching is superior to wet quenching in terms of energy saving, environmental protection, and improved coke quality.

[0003] The dry quenching coke equipment system mainly consists of red coke charging equipment, cold coke discharge equipment, gas circulation equipment, dry quenching furnace, and dry quenching boiler equipment.

[0004] Coke cans are used to transport red coke pushed out of the carbonization chamber. The coke cans are transported to the dry quenching hoisting shaft by electric locomotives and coke can trolleys, and the red coke is loaded into the dry quenching furnace by the hoisting device.

[0005] Refractory coke cans consist of two parts: the can body and the bottom gate. The can body is further divided into three sections: the upper section, the straight section, and the conical section. Traditional coke cans use metal liners for the bottom gate, upper section, straight section, and conical section. However, this is costly, and the straight and conical sections, being in direct contact with high-temperature coke, have a shorter service life. To address these issues, newer coke cans use refractory linings instead of metal linings. While refractory materials have high high-temperature strength, they are susceptible to erosion and wear, and are not resistant to impacts and vibrations. This can lead to lining cracking, detachment, and high outer shell temperatures (typically 350°C), red-hot discoloration, deformation, cracking, and burning. During hoisting, collisions between the coke can and its lid can cause the upper refractory lining to detach, affecting its service life. Furthermore, after prolonged use, the bottom gate refractory lining may wear and dent, resulting in coke residue during unloading, a phenomenon known as "coke residue." This "coke retention" phenomenon can cause coke to get stuck between the coke pot and the bottom gate, posing a safety hazard to production.

[0006] Utility model application CN202320061178.1 discloses a "coke jar with wear-resistant and high-temperature resistant castable material", including a jar body, a jar opening at the upper end of the jar body, and a conical body at the lower end of the jar body. An inner refractory castable layer is provided on the inner wall of the jar body, the jar opening, and the conical body. An inner refractory sheet layer is provided on the inner wall of the inner refractory castable layer. An outer refractory castable layer is provided on the outer wall of the jar body, the jar opening, and the conical body. By providing the inner and outer refractory castable layers, the refractory sheets can be firmly and closely bonded to the coke jar, giving the refractory and wear-resistant layer on the coke jar good integrity and filling the gaps between the refractory sheets, thus giving the coke jar better high-temperature resistance and wear resistance. The inner and outer refractory sheet layers allow for individual replacement of damaged refractory sheets when they are damaged, reducing the maintenance cost of the coke jar.

[0007] Utility model application CN202223542428.8 discloses "a refractory material coke oven", in which the inner side of the upper conical part of the upper part of the coke oven body is fitted with a metal liner through hooks and bolts; the inner side of the straight section in the middle of the coke oven body is fitted with a low-density refractory precast block; the inner side of the lower conical part of the coke oven body is fitted with a high-density refractory precast block; lightweight heat-insulating castable is filled between the coke oven body and the low-density refractory precast block and between the coke oven body and the high-density refractory precast block to play a role in heat insulation; the transition part between the straight section and the lower conical part inside the coke oven body, the bottom of the lower conical part, and the upper part of the bottom gate of the coke oven body are all filled with high-density castable; and a bottom gate outer ring liner made of heat-resistant cast steel is installed on the bottom gate of the coke oven.

[0008] Utility model application CN 201922108361.9 discloses "a dry-quenched coke refractory and heat-insulating coke tank", which includes a coke tank body formed of steel structure and a refractory and heat-insulating layer disposed within the coke tank body; the coke tank body includes a tank mouth section, a cylindrical section and a conical section arranged sequentially from top to bottom, and a gate made of heat-resistant stainless steel is fixed to the bottom of the conical section; the refractory and heat-insulating layer includes a pressure-bearing heat-insulating layer fixed to the inner wall of the tank mouth section, a wear-resistant heat-insulating layer fixed to the inner wall of the cylindrical section, an impact-resistant heat-insulating layer fixed to the inner wall of the conical section and a high-impact-resistant heat-insulating layer fixed to the inner wall of the gate. Utility Model Content

[0009] To solve the above problems, this utility model provides a wear-resistant and temperature-resistant coke can, the specific technical solution of which is as follows:

[0010] A wear-resistant and temperature-resistant coke tank includes a tank body and a bottom gate 1. The tank body is divided into an upper opening section 2, a straight section 3 and a conical section 4 from top to bottom. The upper opening section 2, the straight section 3, the conical section 4 and the bottom gate 1 are all composed of an outer shell layer and an inner lining layer.

[0011] The outer shell layer of the upper section is welded to the outer shell layer of the straight section, the outer shell layer of the straight section is welded to the outer shell layer of the conical section, and the outer shell layer of the conical section is hinged to the outer shell layer of the bottom gate.

[0012] The inner lining of the upper section and the inner lining of the bottom gate are made of high-temperature resistant and wear-resistant lining plates;

[0013] The inner lining of the straight section and the inner lining of the conical section are made of high-temperature resistant and erosion-resistant castable.

[0014] Furthermore,

[0015] The outer shell of the upper section is made of heat-resistant steel plate rolled and welded;

[0016] The outer shell of the straight section is made of heat-resistant steel plate rolled and welded;

[0017] The outer shell of the cone segment is made of heat-resistant steel plate rolled and welded;

[0018] The outer shell of the bottom gate is formed by welding heat-resistant steel plates.

[0019] Furthermore,

[0020] The vertical welds of the upper section of the outer shell are not aligned with the vertical welds of the straight section of the outer shell.

[0021] The vertical welds of the straight section outer shell layer and the vertical welds of the tapered section outer shell layer are not on the same straight line.

[0022] Furthermore,

[0023] A heat insulation layer made of heat insulation cotton is provided between the outer shell layer of the upper section and the inner lining layer of the upper section;

[0024] A heat insulation layer made of heat insulation cotton is provided between the outer shell layer and the inner lining layer of the bottom gate.

[0025] Furthermore,

[0026] The inner lining and the insulation layer of the upper section are anchored to the inner surface of the outer shell of the upper section.

[0027] The inner lining and insulation layer of the bottom gate are anchored to the inner surface of the outer shell of the bottom gate.

[0028] Furthermore,

[0029] An insulation layer made of polymer-bonded insulation blanket is provided between the outer shell layer and the inner lining layer of the straight section;

[0030] An insulation layer made of polymer-bonded insulation blanket is placed between the outer shell layer and the inner lining layer of the cone segment.

[0031] Furthermore,

[0032] Anchors are uniformly installed on the inner surfaces of the outer shell layer of the straight section and the outer shell layer of the tapered section.

[0033] Furthermore,

[0034] The anchor is a straight anchor.

[0035] Furthermore,

[0036] The anchors are arranged with a circumferential interval of 120mm and an axial interval of 100mm.

[0037] Furthermore,

[0038] The anchor is made of ceramic fiber wrapped around its entire body.

[0039] Furthermore,

[0040] Radial ribs are evenly distributed on the outer surface of the outer shell layer in the upper section;

[0041] Radial ribs are evenly distributed on the outer surface of the outer shell layer of the conical segment;

[0042] At least two annular reinforcing bars are provided at equal intervals along the height direction on the outer surface of the shell layer of the straight section.

[0043] Furthermore,

[0044] The high-temperature resistant and erosion-resistant castable is a low-cement castable with high-alumina material, cordierite, and mullite as the base materials, and is cast to form a casting thickness of 80mm-120mm.

[0045] This utility model discloses a wear-resistant and temperature-resistant coke tank with a simple structure, good stability, and high reliability. The outer shell temperature is controlled below 200℃, preventing it from reddening, deforming, cracking, or burning. The inner lining will not crack or detach. There will be no refractory material detachment at the top opening. There will be no coke residue or jamming at the bottom gate. It is safe, reliable, operates stably, is not easily damaged, and has a long service life. Attached Figure Description

[0046] Figure 1 This is a half-section view of the present invention.

[0047] In the picture,

[0048] 1-Bottom gate;

[0049] 2-Upper stage;

[0050] 3-Straight segment;

[0051] 4-Cone segment. Detailed Implementation

[0052] The wear-resistant and temperature-resistant coke pot of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] To address the wear-resistance issues of the existing upper section and bottom gate's refractory materials and improve the overall service life of the coke tank, this technical solution improves the structures of the bottom gate 1, upper section 2, straight section 3, and conical section 4, as follows: Figure 1 As shown.

[0054] All of the above-mentioned gates, whether it be the bottom gate 1, the upper section 2, the straight section 3, or the conical section 4, adopt the existing outer shell + inner lining structure. The corresponding technical improvements are as follows:

[0055] The outer shell of the upper section is made of high-temperature resistant steel plate directly rolled, and the vertical joint is welded;

[0056] The outer shell of the straight section is made of high-temperature resistant steel plate directly rolled, and the vertical joint is welded;

[0057] The outer shell of the conical section is made of high-temperature resistant steel plate directly rolled, and the vertical joint is welded;

[0058] Meanwhile, in order to reduce stress concentration, the vertical welding line of the upper section is not on the same straight line as the vertical welding line of the straight section. Correspondingly, the vertical welding line of the straight section is not on the same straight line as the vertical welding line of the tapered section.

[0059] Meanwhile, to enhance stability, radial ribs (similar to the ribs on the inner surface of an umbrella) are provided on the outer surface of the outer shell of the upper section; radial ribs are provided on the outer surface of the outer shell of the conical section; and at least two annular hoops are provided at equal intervals along the height direction on the outer surface of the outer shell of the straight section, preferably three annular hoops are provided at equal intervals.

[0060] The inner lining of the upper section and the inner lining of the bottom gate are made of high-temperature resistant and wear-resistant lining plates;

[0061] The inner lining of the straight section and the inner lining of the conical section are made of high-temperature resistant and erosion-resistant castable.

[0062] To enhance high-temperature resistance, a heat insulation layer made of heat-insulating cotton is installed between the outer shell layer and the inner lining layer of the upper section, with the inner lining layer and the heat insulation layer anchored to the outer shell layer of the upper section. Similarly, a heat insulation layer made of heat-insulating cotton is installed between the outer shell layer and the inner lining layer of the bottom gate, with the outer shell layer and the heat insulation layer anchored to the outer shell layer of the bottom gate. A heat insulation layer made of polymer-bonded insulation blanket is installed between the outer shell layer and the inner lining layer of the straight section; a heat insulation layer made of polymer-bonded insulation blanket is installed between the outer shell layer and the inner lining layer of the conical section.

[0063] Since the outer shell and inner lining of the straight section and the conical section are made of different materials and have different coefficients of thermal expansion, in order to balance the overall thermal deformation and thermal stress, anchors are uniformly set on the inner surface of the outer shell of the straight section and the outer shell of the conical section. The anchors are straight anchors, arranged in a manner with a circumferential interval of 120mm and an axial interval of 100mm, and wrapped with ceramic fibers all around.

[0064] The high-temperature resistant and erosion-resistant castable used to make the inner lining layer of the straight section and the inner lining layer of the conical section is a low-cement castable with high alumina material + cordierite + mullite as the base material, and is cast to form a casting thickness of 80mm-120mm.

[0065] The overall overview of the wear-resistant and temperature-resistant coke tank described above is as follows:

[0066] A wear-resistant and temperature-resistant coke tank includes a tank body and a bottom gate. The bottom gate is hinged to the tank body at the bottom of the conical section of the tank body to achieve opening and closing functions. The outer shell of the tank body is made of steel plate and consists of three parts: an upper opening, a straight section, and a conical section, which are welded together. The upper opening, straight section, and conical section are each rolled from a single piece of plate, and the weld seams at the joints are staggered during assembly. Radial ribs are welded to the outer surface of the upper opening and the conical section. Three reinforcing hoops are added to the outer height of the straight section of the tank body, evenly distributed along the height direction.

[0067] The upper outer shell layer is provided with a heat insulation layer of heat insulation cotton and an inner lining layer made of high temperature resistant steel plate in sequence. The heat insulation layer and the inner lining layer are anchored to the outer shell layer by bolts.

[0068] The bottom gate outer shell layer is provided with a heat insulation layer of heat insulation cotton and an inner lining layer made of high temperature resistant steel plate in sequence. The heat insulation layer and the inner lining layer are anchored to the outer shell layer by bolts.

[0069] The straight and tapered sections consist of an insulation layer, anchors, and refractory material. The inner surfaces of the straight and tapered sections are made of straight metal anchors (machined from 6mm diameter round steel), and 4mm of ceramic fiber is wrapped around the anchors.

[0070] For the inner lining of the straight and conical sections, a low-cement castable based on high-alumina material, cordierite, and mullite is used to form a casting thickness of 80mm-120mm, preferably 100mm. Then, an anchoring structure is used to connect it to the outer shell layer. After this setup, when the furnace temperature is 800℃ and 1000℃ respectively, the temperature of the outer wall of the furnace shell at the anchoring structure can be controlled within the range of 200-230℃.

[0071] To further reduce the temperature of the coke oven shell, a layer of polymer-bonded insulating fiber blanket is added between the coke oven body and the inner lining castable. Using this insulation layer can effectively reduce the temperature of the coke oven shell, keeping it below 200℃ (actually around 160-170℃), thus meeting the requirements for use under operating conditions.

[0072] The straight metal anchors are welded to the inner surfaces of the straight and conical sections with an upper and lower spacing of 100mm and an annular spacing of 120mm, and then 100mm of castable refractory is poured in.

Claims

1. A wear-resistant and temperature-resistant coke tank, comprising a tank body and a bottom gate (1), wherein the tank body is divided from top to bottom into an upper opening section (2), a straight section (3), and a conical section (4), characterized in that: The upper section (2), straight section (3), conical section (4) and bottom gate (1) are all composed of an outer shell and an inner lining. The outer shell layer of the upper section is welded to the outer shell layer of the straight section, the outer shell layer of the straight section is welded to the outer shell layer of the conical section, and the outer shell layer of the conical section is hinged to the outer shell layer of the bottom gate. The inner lining of the upper section and the inner lining of the bottom gate are made of high-temperature resistant and wear-resistant lining plates; The inner lining of the straight section and the inner lining of the conical section are made of high-temperature resistant and erosion-resistant castable.

2. The wear-resistant and temperature-resistant coke can according to claim 1, characterized in that: The outer shell of the upper section is made of heat-resistant steel plate rolled and welded; The outer shell of the straight section is made of heat-resistant steel plate rolled and welded; The outer shell of the cone segment is made of heat-resistant steel plate rolled and welded; The outer shell of the bottom gate is formed by welding heat-resistant steel plates.

3. The wear-resistant and temperature-resistant coke can according to claim 2, characterized in that: The vertical welds of the upper section of the outer shell are not aligned with the vertical welds of the straight section of the outer shell. The vertical welds of the straight section outer shell layer and the vertical welds of the tapered section outer shell layer are not on the same straight line.

4. The wear-resistant and temperature-resistant coke can according to claim 1, characterized in that: A heat insulation layer made of heat insulation cotton is provided between the outer shell layer of the upper section and the inner lining layer of the upper section; A heat insulation layer made of heat insulation cotton is provided between the outer shell layer and the inner lining layer of the bottom gate.

5. A wear-resistant and temperature-resistant coke can according to claim 4, characterized in that: The inner lining and the insulation layer of the upper section are anchored to the inner surface of the outer shell of the upper section. The inner lining and insulation layer of the bottom gate are anchored to the inner surface of the outer shell of the bottom gate.

6. The wear-resistant and temperature-resistant coke can according to claim 1, characterized in that: An insulation layer made of polymer-bonded insulation blanket is provided between the outer shell layer and the inner lining layer of the straight section; An insulation layer made of polymer-bonded insulation blanket is placed between the outer shell layer and the inner lining layer of the cone segment.

7. A wear-resistant and temperature-resistant coke can according to claim 2, characterized in that: Anchors are uniformly installed on the inner surfaces of the outer shell layer of the straight section and the outer shell layer of the tapered section.

8. A wear-resistant and temperature-resistant coke can according to claim 7, characterized in that: The anchor is a straight anchor.

9. A wear-resistant and temperature-resistant coke can according to claim 7, characterized in that: The anchors are arranged with a circumferential interval of 120mm and an axial interval of 100mm.

10. A wear-resistant and temperature-resistant coke can according to claim 7, characterized in that: The anchor is made of ceramic fiber wrapped around its entire body.

11. A wear-resistant and temperature-resistant coke can according to claim 1, characterized in that: Radial ribs are evenly distributed on the outer surface of the outer shell layer in the upper section; Radial ribs are evenly distributed on the outer surface of the outer shell layer of the conical segment; At least two annular reinforcing bars are provided at equal intervals along the height direction on the outer surface of the shell layer of the straight section.

12. A wear-resistant and temperature-resistant coke can according to claim 1, characterized in that: The high-temperature resistant and erosion-resistant castable is a low-cement castable with high-alumina material, cordierite, and mullite as the base materials, and is cast to form a casting thickness of 80mm-120mm.

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