Lining protection mechanism for high-chlorine compound fertilizer granulation kiln

Abstract

A high-chlorine compound fertilizer granulation kiln lining protection mechanism comprises a horizontally-arranged granulation kiln outer cylinder, a plurality of steam nozzles arranged at intervals in the axial direction of the outer cylinder are arranged in the outer cylinder, the steam nozzles extend to the position close to the outer cylinder in the radial direction of the outer cylinder, and the inner wall of the outer cylinder is covered with a rubber lining. Annular ribs made of stainless steel are arranged at the positions, corresponding to the steam nozzles, of the inner wall of the outer barrel, the annular ribs are arranged in the circumferential direction of the inner wall of the outer barrel, the sides, close to the shaft core, of the annular ribs in the radial direction are inner, the sides, away from the shaft core, of the annular ribs are outer, and the inner sides of the annular ribs exceed the rubber lining; the inner side of each annular rib is provided with a stainless steel extension portion extending along the two axial sides of the outer cylinder, the inner side face of each annular rib and the inner side faces of the extension portions on the two sides jointly form an annular check ring, and the outer sides of the extension portions are attached to the rubber lining. The lining of the granulation kiln can be effectively protected, and the service life of the lining of the granulation kiln can be prolonged.

Description

Technical Field

[0001] The utility model relates to a lining protection mechanism for a high-chlorine compound fertilizer granulation kiln. Background Art

[0002] The granulation process of compound fertilizer production is carried out in a granulation kiln. The granulation kiln for compound fertilizer production includes a horizontal cylinder, and a plurality of material inlets and a plurality of steam nozzles are arranged in the cylinder. The steam nozzles extend radially along the granulation kiln to the outer cylinder of the granulation kiln, and the general spacing is about 13 cm. For the structure of the granulation kiln, please refer to the Chinese patent: CN216174501U. The inner wall of the traditional granulation kiln is provided with a rubber lining. The high-temperature and high-pressure steam sprayed by the steam nozzle will damage the rubber lining. According to the estimation of compound fertilizer manufacturers, the life of the granulation kiln lining is generally only about half a year, and replacing the granulation kiln lining will not only affect production, but also incur a lot of expenses. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-chlorine compound fertilizer granulation kiln lining protection mechanism, which can effectively protect the granulation kiln lining and extend the service life of the granulation kiln lining.

[0004] In order to solve the above technical problems, the utility model provides a lining protection mechanism for a high-chlorine compound fertilizer granulation kiln, comprising a horizontally arranged outer cylinder of the granulation kiln, a plurality of steam nozzles arranged at intervals along the axial direction of the outer cylinder are provided in the outer cylinder, the steam nozzles all extend radially along the outer cylinder to close to the outer cylinder, the inner wall of the outer cylinder is covered with a rubber lining, and an annular ridge made of stainless steel is provided at a position on the inner wall of the outer cylinder corresponding to each steam nozzle, the annular ridges are arranged circumferentially along the inner wall of the outer cylinder, the side of the annular ridge close to the shaft core along the radial direction is the inner side, and the side away from the shaft core is the outer side, the inner side of the annular ridge exceeds the rubber lining, and the inner side of each annular ridge is provided with a stainless steel extension extending along both sides of the axial direction of the outer cylinder, the inner side surface of the annular ridge and the inner side surfaces of the extensions on both sides jointly form an annular retaining ring, and the outer side of the extension is in contact with the rubber lining.

[0005] For the purpose of simple explanation, the high-chlorine compound fertilizer granulation kiln lining protection mechanism described in the utility model is referred to as this mechanism below.

[0006] Advantages of this mechanism: The annular retaining ring in this mechanism can effectively block the high-temperature and high-pressure steam ejected from the steam nozzle to prevent it from directly contacting the lining of the granulation kiln, and transfer the heat to the outer cylinder to dissipate heat in time, thereby extending the service life of the lining of the granulation kiln, improving production efficiency and reducing production costs.

[0007] In order to achieve better use effect of this mechanism, the preferred scheme is as follows:

[0008] Preferably, the portion where the annular ridge and the extension contact the rubber lining is provided with a heat insulating cushion layer.

[0009] The heat insulating pad layer can prevent the annular ridge and the extension portion from conducting heat to the rubber lining, thereby preventing the rubber lining from being damaged by heat.

[0010] Preferably, a plurality of outwardly protruding heat dissipation fins are provided on the outer circumference of the outer cylinder, and the heat dissipation fins are arranged at equal intervals along the axial direction of the outer cylinder.

[0011] The heat absorbed by the annular convex ridge is transferred to the outer cylinder, and the heat dissipation fins on the outer cylinder can increase the contact area between the outer cylinder and the air, thereby increasing the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of this organization.

[0013] Figure 2 yes Figure 1 A partial large picture of part A in the middle.

[0014] Figure 3 yes Figure 2 BB cross-sectional view. DETAILED DESCRIPTION

[0015] High-chlorine compound fertilizer, including the following components in parts by weight: 10.8 parts of urea, 27 parts of monoammonium phosphate, 25 parts of potassium chloride, 28 parts of ammonium chloride, 7 parts of magnesium sulfate monohydrate, 0.3 parts of zinc sulfate monohydrate, 0.9 parts of borax, 0.3 parts of anti-caking agent, 0.5 parts of concentrated sulfuric acid, and 0.5 parts of liquid ammonia;

[0016] Among them, the content of effective ingredients of nitrogen, phosphorus and potassium is: N 15 parts, P2O5 13 parts, K2O 15 parts;

[0017] The processing technology of high-chlorine compound fertilizer includes the following steps:

[0018] Step 1: Mix magnesium sulfate monohydrate, zinc sulfate monohydrate and borax in proportion to obtain medium-trace powder;

[0019] Step 2: Urea, monoammonium phosphate, potassium chloride, ammonium chloride and medium and trace powders are transported to the pulverizer in proportion through different metering belt scales, and after being fully crushed, they are transported to the granulation kiln for granulation, and then sieved, dried and cooled to obtain coarse particles;

[0020] Step 3: transport the coarse particles from step 2 into the coating kiln for coating, and then pack them to obtain high-chlorine compound fertilizer 15-13-15+2MgO.

[0021] See also Figure 1-Figure 3A high-chlorine compound fertilizer granulation kiln lining protection mechanism comprises a horizontally arranged granulation kiln outer cylinder 1, wherein the outer cylinder 1 is provided with a plurality of steam nozzles 2 arranged at intervals along the axial direction of the outer cylinder 1 (there are other material inlets in the outer cylinder, such as acid inlet, ammonia inlet, etc., which are conventional technologies, and are not described in detail in this embodiment), wherein the steam nozzles 2 extend radially along the outer cylinder 1 to a position close to the outer cylinder 1, and the inner wall of the outer cylinder 1 is covered with a rubber lining 12, and the inner wall of the outer cylinder 1 corresponds to each The steam nozzle 2 is provided with an annular ridge 3 made of stainless steel, which is arranged circumferentially along the inner wall of the outer cylinder 1, with the side of the annular ridge 3 close to the shaft core along the radial direction as the inner side and the side away from the shaft core as the outer side. The inner side of the annular ridge 3 exceeds the rubber lining 12, and the inner side of each annular ridge 3 is provided with a stainless steel extension part 31 extending along both sides of the axial direction of the outer cylinder 1. The inner side surface of the annular ridge 3 and the inner side surfaces of the extension parts 31 on both sides jointly form an annular retaining ring, and the outer side of the extension part 31 is in contact with the rubber lining 12.

[0022] The portion where the annular ridge 3 and the extension portion 31 contact the rubber lining 12 is provided with a heat insulating cushion layer 32 .

[0023] A plurality of outwardly protruding heat dissipation fins 11 are disposed on the outer circumference of the outer cylinder 1 , and the heat dissipation fins 11 are arranged at equal intervals along the axial direction of the outer cylinder 1 .

[0024] Advantages of this mechanism: The annular retaining ring in this mechanism can effectively block the high-temperature and high-pressure steam sprayed from the steam nozzle 2 to prevent it from directly contacting the lining of the granulation kiln, and transfer the heat to the outer cylinder 1 for timely heat dissipation, thereby extending the service life of the lining of the granulation kiln, improving production efficiency and reducing production costs.

[0025] The heat insulating pad layer 32 can prevent the annular ridge 3 and the extension portion 31 from transferring heat to the rubber lining 12 , thereby preventing the rubber lining 12 from being damaged by heat.

[0026] The heat absorbed by the annular convex ridge 3 is transferred to the outer cylinder 1 , and the heat dissipation fins 11 on the outer cylinder 1 can increase the contact area between the outer cylinder 1 and the air, thereby increasing the heat dissipation effect.

Claims

1. A lining protection mechanism for a high-chlorine compound fertilizer granulation kiln, comprising a horizontally arranged outer cylinder of a granulation kiln, a plurality of steam nozzles arranged at intervals along the axial direction of the outer cylinder are arranged in the outer cylinder, the steam nozzles all extend radially along the outer cylinder to near the outer cylinder, the inner wall of the outer cylinder is covered with a rubber lining, characterized in that: An annular ridge made of stainless steel is provided on the inner wall of the outer cylinder at a position corresponding to each steam nozzle. The annular ridges are arranged circumferentially along the inner wall of the outer cylinder. The side of the annular ridge close to the shaft core along the radial direction is the inner side, and the side away from the shaft core is the outer side. The inner side of the annular ridge exceeds the rubber lining. The inner side of each annular ridge is provided with a stainless steel extension portion extending along both sides of the axial direction of the outer cylinder. The inner side surface of the annular ridge and the inner side surfaces of the extension portions on both sides jointly form an annular retaining ring, and the outer side of the extension portion is in contact with the rubber lining.

2. The high-chlorine compound fertilizer granulation kiln lining protection mechanism according to claim 1 is characterized in that: The portion where the annular ridge and the extension part contact the rubber liner is provided with a heat insulating cushion layer.

3. The high-chlorine compound fertilizer granulation kiln lining protection mechanism according to claim 1 is characterized in that: A plurality of outwardly protruding heat dissipation fins are arranged on the outer circumference of the outer cylinder, and the heat dissipation fins are arranged at equal intervals along the axial direction of the outer cylinder.

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