White cement bleaching machine with circulating cooling

Abstract

The utility model discloses a white cement bleaching machine water spraying device with circulating cooling, which comprises three coaxially nested pipes: an inner cooling water delivery pipe, a middle atomized water delivery pipe and an outer cooling cavity sleeve pipe. The atomized water delivery pipe is provided with multiple nozzles along the length direction. The cooling cavity sleeve pipe is connected with the cooling water delivery pipe to form an annular cooling cavity. The cooling water circulates in the cavity and cools the atomized water delivery pipe and the nozzles. The three-pipe nested structure separates the cooling and atomizing functions. The outer sleeve pipe provides rigid support to resist the impact of high-temperature clinker. The annular cooling cavity uniformly dissipates heat to prevent the gun body from overheating and softening, ensuring stable atomizing pressure. The device effectively solves the problems of traditional straight pipe type spray gun, such as easy deformation, insufficient cooling, uneven atomization and frequent maintenance, improving the stability and continuity of the white cement clinker rapid cooling process.

Description

Technical Field

[0001] This utility model relates to a water spraying device for a white cement bleaching machine with circulating cooling. Background Technology

[0002] In white cement production, the clinker discharged after calcination in the rotary kiln reaches a temperature as high as 1450℃. It needs to enter the cooling kiln and be rapidly cooled by high-pressure atomized water spray. This step is the core process to inhibit the oxidation of iron and ensure the whiteness (≥87 degrees) and strength of the clinker. If the cooling is not timely or uniform, it will cause Fe²+ to be converted into Fe³+ and form black spots, while also affecting the stability of the glassy structure of the clinker.

[0003] Currently, the industry generally uses traditional straight-tube atomizing spray guns with a length of 3-4 meters for water spraying. This spray gun has a single-layer steel pipe structure, with multiple atomizing nozzles fixedly installed along the length of the pipe. It has an internal cooling water channel to reduce the temperature of the pipe body. High-pressure atomized water is transported to each nozzle through the pipe body, and after atomization, it is sprayed onto the high-temperature clinker to achieve rapid cooling.

[0004] However, the aforementioned existing technologies have significant drawbacks under the harsh conditions of a cooling kiln at 1450°C and continuous impact from clinker particles: Poor structural stability and easy deformation and failure: The 3-4 meter long straight pipe lacks rigidity. Under high temperature environment, the thermal expansion and contraction are uneven. Coupled with the continuous impact of clinker particles, the pipe body will bend in a short period of time, causing the nozzle to deviate from the preset cooling area and the atomization coverage to be misaligned.

[0005] Insufficient cooling efficiency and easy overheating of the gun body: Although the cooling water channel is built in, the straight pipe structure causes the heat to concentrate at the front end near the material. The cooling water cannot quickly remove the local heat, which often results in softening of the front end of the gun body and leakage at the nozzle interface, further deteriorating the atomization effect.

[0006] Uneven atomization coverage and the existence of cooling dead zones: The nozzle shifts due to the deformation of the pipe body, and the atomizing water pressure is easily affected by leakage, resulting in increased atomization particle size, uneven coverage, and large temperature difference in the cooling area, which affects the rapid cooling effect of clinker.

[0007] High maintenance costs affect production continuity: the gun body needs to be completely disassembled and replaced after deformation or nozzle blockage. Frequent downtime affects production efficiency and increases spare parts and labor costs.

[0008] Therefore, there is an urgent need to develop a new type of atomizing water spray device adapted to this working condition in order to solve the above-mentioned technical problems. Summary of the Invention

[0009] This utility model aims to provide a water spraying device for a white cement bleaching machine with circulating cooling, which solves the problems of easy structural deformation, insufficient cooling, uneven atomization, and frequent maintenance of existing straight-tube atomizing spray guns under high temperature and high impact conditions, improves the stability of the device, extends its service life, and ensures the quality of rapid cooling of clinker.

[0010] The technical solutions adopted in this utility model are as follows: A water spraying device for a white cement bleaching machine with circulating cooling, comprising: The cooling water delivery pipe, which is the inner layer pipe, is used to transport cooling water; The atomizing water delivery pipe is an intermediate layer pipe, coaxially nested outside the cooling water delivery pipe. Multiple nozzles are provided along the length of the pipe body for independently delivering atomized water. The cooling chamber outer sleeve is an outer tube that is coaxially nested outside the atomizing water delivery pipe, and its inner wall forms an annular cooling chamber with the outer wall of the atomizing water delivery pipe. The cooling water delivery pipe is connected to the annular cooling chamber. Cooling water enters the annular cooling chamber from the cooling water delivery pipe and circulates, providing surround cooling for the atomizing water delivery pipe and nozzle.

[0011] Furthermore, the cooling water delivery pipe and the cooling chamber outer sleeve are both made of 310S heat-resistant stainless steel, and the atomizing water delivery pipe is made of 304 stainless steel.

[0012] Furthermore, the sidewall of the atomizing water delivery pipe is uniformly provided with multiple atomizing nozzle interfaces along its length.

[0013] Furthermore, the atomizing nozzle interface is adapted to a 90° fan-shaped atomizing nozzle.

[0014] Furthermore, the atomized water delivery pipe is provided with a water inlet.

[0015] Furthermore, the cooling chamber outer sleeve is welded to the atomizing water delivery pipe on the left side, and a drain hole is provided on the left side for the cooling water to be discharged.

[0016] Furthermore, it also includes atomizing water sub-connector, used to connect the interfaces of each atomizing nozzle of the atomizing water delivery pipe.

[0017] Furthermore, it also includes an atomizing connector, which is disposed at the atomizing nozzle interface of the atomizing water delivery pipe.

[0018] This utility model has the following beneficial effects: (1) The three-tube coaxial nested structure is adopted. The outer cooling chamber jacket is used as a rigid support to form a stable overall frame. Its bending and impact resistance is better than that of traditional single-layer straight pipe. It can effectively resist the continuous impact of high-temperature clinker and reduce the problems of gun body deformation and nozzle deviation.

[0019] (2) The cooling chamber outer sleeve is connected to the cooling water delivery pipe to form an annular cooling chamber. After the cooling water fills the chamber, it surrounds the atomizing water delivery pipe in all directions to achieve uniform cooling in a surrounding manner, avoid softening and deformation of the atomizing pipe and nozzle area due to local overheating, and eliminate the risk of leakage at the nozzle interface.

[0020] (3) The atomizing water delivery pipe is independently nested in the cooling chamber and is not affected by structural deformation. With multiple nozzles evenly distributed along the length of the pipe, it can ensure stable atomizing water pressure and consistent atomization effect of each nozzle, eliminate cooling dead zones, and improve the temperature uniformity of clinker rapid cooling.

[0021] (4) The three-tube nested structure improves overall reliability and reduces the frequency of failures caused by gun body deformation or overheating; at the same time, the structural layout facilitates local maintenance and component replacement, reduces the downtime of the cooling kiln, and improves production continuity. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the present utility model.

[0023] Figure 2 This is a cross-sectional view of the present invention.

[0024] The components include: 1. Cooling water delivery pipe, 2. Atomizing water delivery pipe, 3. Cooling chamber outer sleeve, 4. Atomizing water sub-connector, and 5. Atomizing connector. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1 and Figure 2 This implementation method is adapted to the high-temperature clinker quenching process in white cement production. Specifically, it is applied to a cooling kiln with specifications of Φ3.5-4.0m×14-16m (the mainstream cooling kiln specifications in the industry). It is used to perform high-pressure atomized water spray quenching on the 1450℃ high-temperature clinker discharged from the rotary kiln. The core objective is to inhibit the oxidation of iron (Fe²⁺) in the clinker to Fe³⁺ (to avoid the formation of black spots), stabilize the glassy structure of the clinker, and ultimately ensure that the whiteness of the clinker is ≥87 degrees (meeting the core quality requirements for white cement production) and mechanical strength.

[0027] This device is assembled according to a coaxial nesting logic of "inner layer - middle layer - outer layer". The selection, size and connection method of each component correspond to the features in the claims, as detailed below: A cooling water delivery pipe 1 made of 310S heat-resistant stainless steel was selected as the inner pipe. Its outer diameter is 60mm, wall thickness is 5mm, and total length is 3.2m, which is compatible with the length from the feed end of the cooling kiln to the quench zone. The left end of the cooling water delivery pipe 1 is the cooling water inlet, which is compatible with the existing circulating cooling water pipeline in the factory. The right end is connected to the annular cooling chamber to ensure that the cooling water can flow smoothly into the cooling chamber.

[0028] A 304 stainless steel atomizing water delivery pipe 2 is used as an intermediate layer pipe and is coaxially nested outside the cooling water delivery pipe 1. The atomizing water delivery pipe 2 has an outer diameter of 200mm, a wall thickness of 8mm, and a total length of 3m. Thirteen atomizing nozzle interfaces are evenly opened along the length of the pipe body side wall, with an interface spacing of 200mm and an orifice diameter of Φ30mm. A Φ28mm high-pressure water inlet interface is welded to the left end of the atomizing water delivery pipe 2 as the atomizing water inlet, which is connected to the factory's high-pressure water pump station. The two sides of the pipe body are sealed and welded to the cooling water delivery pipe 1 to prevent media leakage.

[0029] The cooling chamber outer sleeve 3, made of 310S heat-resistant stainless steel, is used as the outer tube and is coaxially nested outside the atomizing water delivery pipe 2. The cooling chamber outer sleeve 3 has an outer diameter of 310mm, a wall thickness of 10mm, and a total length of 3.1m. Its inner wall and the outer wall of the atomizing water delivery pipe 2 enclose an annular cooling chamber. The cooling chamber outer sleeve 3 and the atomizing water delivery pipe 2 are welded and fixed on the left side, and the left side of the cooling chamber outer sleeve 3 has a pre-set drain hole as a cooling water outlet for discharging the circulating cooling water after heat absorption.

[0030] Connect the atomizing water sub-connector 4 to each atomizing nozzle interface of the atomizing water delivery pipe 2 to ensure that the atomizing water can be evenly distributed to each nozzle position.

[0031] Atomizing connectors 5 are installed at each atomizing nozzle interface of the atomizing water delivery pipe 2. The atomizing connectors 5 are adapted to 90° fan-shaped atomizing nozzles to ensure that the atomized water can cover the 90° range of the cross-section of the cooling kiln laterally after being sprayed out, so as to achieve uniform spraying.

[0032] The device operates as follows: Cooling water circulation: Low-temperature cooling water enters from the cooling water inlet at the left end of the cooling water delivery pipe 1, flows along the pipe cavity of the cooling water delivery pipe 1 to the right end, and then enters the annular cooling chamber enclosed by the cooling chamber outer sleeve 3 and the atomizing water delivery pipe 2. After the cooling water fills the entire annular cooling chamber, it completely surrounds the atomizing water delivery pipe 2 and the atomizing connector 5, achieving circumferential cooling. After absorbing heat, the cooling water is discharged from the cooling water outlet on the left side of the cooling chamber outer sleeve 3, completing the circulating cooling.

[0033] Atomized water spraying: High-pressure atomized water enters from the atomized water inlet at the left end of the atomized water delivery pipe 2, flows along the pipe cavity of the atomized water delivery pipe 2, and is distributed to each atomization connector 5 through the atomized water sub-connector 4. After being atomized by the 90° fan-shaped atomizing nozzle, it forms a fine water mist with a particle size of 50-100μm, which is sprayed onto the 1450℃ high-temperature clinker in the cooling kiln to achieve rapid and uniform cooling.

[0034] Through the above assembly and operation methods, the cooling chamber outer sleeve 3 provides rigid support for the entire device, resisting the continuous impact of clinker with a particle size of 20-50mm; the surrounding cooling of the annular cooling chamber keeps the maximum temperature of the atomizing water delivery pipe 2 and the atomizing connector 5 below 120℃, avoiding softening and leakage; the independent setting of the atomizing water delivery pipe 2 and the evenly distributed nozzles ensure stable atomizing water pressure and coverage without dead corners, meeting the requirements of GB / T 2015-2017 "White Silicate Cement" standard for clinker rapid cooling process.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A water spraying device for a white cement bleaching machine with circulating cooling, characterized in that: include: Cooling water delivery pipe (1) is an inner layer pipe used to deliver cooling water; The atomizing water delivery pipe (2) is an intermediate layer pipe, coaxially nested outside the cooling water delivery pipe (1). Its pipe body is provided with multiple nozzles along the length direction for independently delivering atomizing water. The cooling chamber outer sleeve (3) is an outer tube that is coaxially nested outside the atomizing water delivery pipe (2), and its inner wall forms an annular cooling chamber with the outer wall of the atomizing water delivery pipe (2); The cooling water delivery pipe (1) is connected to the annular cooling chamber. Cooling water enters the annular cooling chamber from the cooling water delivery pipe (1) and circulates, providing circumferential cooling to the atomizing water delivery pipe (2) and the nozzle.

2. The water spraying device for a white cement bleaching machine with circulating cooling as described in claim 1, characterized in that: The cooling water delivery pipe (1) and the cooling chamber outer sleeve (3) are both made of 310S heat-resistant stainless steel, and the atomizing water delivery pipe (2) is made of 304 stainless steel.

3. The water spraying device for a white cement bleaching machine with circulating cooling as described in claim 1, characterized in that: The atomizing water delivery pipe (2) has multiple atomizing nozzle interfaces evenly opened along its length on the side wall of the pipe body.

4. The water spraying device for a white cement bleaching machine with circulating cooling as described in claim 3, characterized in that: The atomizing nozzle interface is adapted to a 90° fan-shaped atomizing nozzle.

5. The water spraying device for a white cement bleaching machine with circulating cooling as described in claim 1, characterized in that: The atomized water delivery pipe (2) is provided with a water inlet.

6. The water spraying device for a white cement bleaching machine with circulating cooling as described in claim 1, characterized in that: The cooling chamber outer sleeve (3) is welded to the atomizing water delivery pipe (2) on the left side, and a drain hole is provided on the left side for the cooling water to be discharged.

7. The water spraying device for a white cement bleaching machine with circulating cooling as described in claim 1, characterized in that: It also includes atomizing water sub-connector (4), used to connect the interfaces of each atomizing nozzle of the atomizing water delivery pipe (2).

8. The water spraying device for a white cement bleaching machine with circulating cooling as described in claim 1, characterized in that: It also includes an atomizing connector (5), which is located at the atomizing nozzle interface of the atomizing water delivery pipe (2).

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