A rigid spray gun for cleaning a titanium chloride white heat exchanger

Abstract

This utility model discloses a rigid spray gun for cleaning titanium dioxide heat exchangers, belonging to the field of titanium dioxide heat exchanger cleaning technology. It solves the problems of incomplete cleaning and high cleaning costs associated with existing rigid spray guns. Specifically, the rigid spray gun includes a high-pressure pipe connector, a stainless steel pipe, and a nozzle. One end of the high-pressure pipe connector is connected to a high-pressure hose, and the other end is connected to the stainless steel pipe. The end of the stainless steel pipe furthest from the high-pressure pipe connector is connected to the nozzle. In this utility model, a rigid spray gun is made by connecting one end of a stainless steel pipe to a high-pressure hose via the high-pressure pipe connector and the other end to the nozzle, replacing the traditional rigid spray gun for cleaning. The length of the stainless steel pipe can be arbitrarily cut according to cleaning requirements, thus achieving thorough cleaning of a 9000mm long titanium dioxide heat exchanger tube in one pass. This thorough cleaning improves work efficiency and saves a significant amount of time. Furthermore, the stainless steel pipe is inexpensive and readily available, reducing procurement costs.

Description

Technical Field

[0001] This utility model relates to the field of cleaning technology for titanium dioxide chlorination heat exchangers, and in particular to a rigid spray gun for cleaning titanium dioxide chlorination heat exchangers. Background Technology

[0002] During the production of titanium dioxide using the chloride process, a hard scale layer containing titanium chloride easily accumulates inside the heat exchanger tube bundle. This scale layer hydrolyzes instantly upon contact with water, generating a large amount of water mist and highly corrosive hypochlorous acid, which causes severe corrosion to conventional high-pressure water jet rigid spray guns (hereinafter referred to as "rigid spray guns") made of carbon steel or brass.

[0003] Currently, the longest rigid spray gun in the industrial cleaning industry is 7500mm, while the length of a titanium dioxide shell-and-tube heat exchanger is 9000mm. Therefore, to thoroughly clean this heat exchanger, cleaning needs to be done from both ends, which not only roughly doubles the workload but also prolongs the cleaning time. Furthermore, due to the corrosive effect of hypochlorous acid, an imported rigid spray gun, worth approximately 6000 yuan, becomes unusable due to corrosion before the cleaning work is even completed. According to conventional cleaning procedures, cleaning a 200m... 2 The shell and tube heat exchanger requires three rigid spray guns, with a direct cost of about 20,000 yuan, making the cleaning cost too high. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a rigid spray gun for cleaning titanium dioxide chlorination heat exchangers, solving the problems of incomplete cleaning and high cleaning costs associated with existing rigid spray guns.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rigid spray gun for cleaning titanium dioxide heat exchangers includes a high-pressure pipe connector, a stainless steel pipe, and a nozzle; one end of the high-pressure pipe connector is connected to a high-pressure hose, the other end of the high-pressure pipe connector is connected to the stainless steel pipe, and the end of the stainless steel pipe away from the high-pressure pipe connector is connected to the nozzle.

[0006] In this solution, a rigid spray gun is made by connecting one end of a stainless steel pipe to a high-pressure hose via a high-pressure pipe connector and the other end to a gun head, replacing the traditional rigid spray gun for cleaning. The length of the stainless steel pipe can be arbitrarily cut according to the cleaning requirements, thereby achieving a thorough cleaning of the 9000mm long titanium dioxide chlorination heat exchanger tubes in one pass. This thorough cleaning improves work efficiency and saves a lot of time. At the same time, the stainless steel pipe is inexpensive and readily available, reducing procurement costs.

[0007] Furthermore, the high-pressure pipe connector has a through hole drilled inside, and a stainless steel pipe is inserted from one end of the through hole. The connection is made by welding. The end of the high-pressure pipe connector that connects to the high-pressure hose has an external thread, and the high-pressure hose is threaded onto the external thread.

[0008] In this solution, the threads of the high-pressure pipe connector and the high-pressure hose are matched to enable quick replacement, facilitating the rapid replacement of the rigid spray gun after the stainless steel pipe is corroded during the cleaning process.

[0009] Furthermore, the joints between the stainless steel pipes and the high-pressure pipe fittings are welded using a 30° V-groove full penetration weld structure.

[0010] In this design, the weld structure ensures weld strength and corrosion resistance under high-pressure conditions.

[0011] Furthermore, one end of the gun head has several spray holes; the other end of the gun head is inserted into a stainless steel tube and connected by continuous circumferential welding using manual arc welding.

[0012] In this solution, during cleaning, high-pressure water is ejected from the nozzle at the end of the nozzle to form a high-speed jet, which directly washes away and peels off the scale layer on the inner wall of the heat exchanger tube bundle.

[0013] Furthermore, the stainless steel pipe is a seamless stainless steel pipe with a diameter of φ12mm × 3mm.

[0014] Furthermore, there are multiple stainless steel pipes, which are welded together sequentially.

[0015] Furthermore, when welding two adjacent stainless steel pipes, a 30° V-shaped bevel is opened at the joint, a 2mm blunt edge is left at the root, and the weld is fully penetrated inside and out after welding, with a weld reinforcement height of ≤1mm.

[0016] In this solution, when the length of the stainless steel pipe needs to be extended, the number of stainless steel pipes is increased directly, and the ends are welded together sequentially; this makes it convenient to extend the length of the stainless steel pipe according to cleaning requirements.

[0017] The beneficial effects of this utility model are: This utility model provides a rigid spray gun for cleaning titanium dioxide chlorination heat exchangers. It utilizes two φ12mm×3m×5000mm 304 stainless steel pipes welded together to form a long rigid spray gun with a diameter of φ12mm×3mm×9000mm. This allows for thorough cleaning of the titanium dioxide chlorination heat exchanger tubes in a single pass, significantly improving cleaning efficiency by over 30% compared to traditional rigid spray gun cleaning methods. This rigid spray gun is particularly suitable for applications involving pipes containing toxic or harmful gases, as well as high-temperature and highly corrosive environments. A single pass effectively prevents workers from prolonged exposure to toxic or harmful gases.

[0018] The direct cost of cleaning a single large heat exchanger using three self-made spray guns (joint processing fee 300 yuan + welding labor fee 300 yuan + material cost 1000 yuan) totals 1600 yuan, saving 92% on material costs compared to before. This cost-saving approach also ensures on-time completion of the project. The rigid spray gun has a simple structure and is easy to manufacture; joints can be machined using a standard lathe, and assembly can be completed by manual arc welding, requiring no specialized equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a rigid spray gun for cleaning a titanium dioxide chlorination heat exchanger according to the present invention. Figure 2 This is a partial structural diagram of a rigid spray gun for cleaning titanium dioxide heat exchangers according to the present invention, near the gun head.

[0020] Figure label: 1. High-pressure pipe connector; 2. Stainless steel pipe; 3. Nozzle; 31. Spray hole; 4. High-pressure hose; Detailed Implementation The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0021] like Figure 1 As shown, this embodiment provides a rigid spray gun for cleaning titanium dioxide chlorination heat exchangers, solving the problems of incomplete cleaning and high cleaning costs associated with existing rigid spray guns. The rigid spray gun for cleaning titanium dioxide chlorination heat exchangers specifically includes: High-pressure pipe connector 1, stainless steel pipe 2, and nozzle 3; The high-pressure pipe connector 1 is connected to a high-pressure hose 4 at one end and a stainless steel pipe 2 at the other end. The end of the stainless steel pipe 2 away from the high-pressure pipe connector 1 is connected to the nozzle 3. The length of the stainless steel pipe 2 can be arbitrarily cut according to the cleaning requirements, thereby enabling the titanium dioxide chlorination heat exchanger tubes to be thoroughly cleaned in one pass, improving work efficiency and reducing procurement costs.

[0022] A φ12mm through hole is drilled inside the high-pressure pipe connector 1. The stainless steel pipe 2 is inserted into one end of the through hole, and the connection is made by welding. The end of the high-pressure pipe connector 1 that connects to the high-pressure hose 4 is tapped with an M24×1.5 external thread. The connector thread of the high-pressure hose 4 is connected to the external thread, which allows for quick replacement and facilitates the rapid replacement of the rigid spray gun after the stainless steel pipe 2 is corroded during the cleaning process.

[0023] The joint between the stainless steel pipe 2 and the high-pressure pipe joint 1 is welded with a 30° V-shaped bevel full penetration structure. This welding structure ensures the weld strength and corrosion resistance under high pressure conditions.

[0024] like Figure 2 As shown, one end of the gun head 3 has several nozzles 31; the other end of the gun head 3 is inserted into the stainless steel tube 2 and connected by continuous circumferential welding using manual electric arc welding. After welding, the entire tube is annealed to relieve stress. During cleaning, high-pressure water is ejected from the nozzles 31 at the end of the gun head 3 to form a high-speed jet, which directly washes away and peels off the scale layer on the inner wall of the heat exchanger tube bundle.

[0025] As a preferred embodiment, the stainless steel pipe 2 is a seamless stainless steel pipe with a diameter of φ12mm × 3mm.

[0026] In this preferred embodiment, the number of stainless steel pipes 2 is two. Two φ12mm×3m×5000mm 304 stainless steel pipes 2 are welded to form a long rigid spray gun with a diameter of φ12mm×3mm×9000mm. During welding, a 30° V-shaped bevel is made at the joint, and a 2mm blunt edge is left at the root. After welding, the weld is fully penetrated inside and out, and the weld reinforcement is ≤1mm.

[0027] When it is necessary to extend the length of stainless steel pipe 2, simply increase the number of stainless steel pipes 2 and weld them end to end in sequence; this makes it convenient to extend the length of stainless steel pipe 2 according to cleaning requirements.

[0028] The working principle of this embodiment is as follows: During the cleaning operation, the high-pressure equipment first outputs high-pressure water, which is then transported through a dedicated high-pressure pipeline to the high-pressure connector 1 of the rigid spray gun. Subsequently, the high-pressure water flows from the high-pressure connector 1 through the stainless steel pipe 2 to the nozzle 3, where it is ejected as a powerful jet of high-pressure water through the nozzle 31. Thanks to the intense cutting action of the high-pressure water jet, the hard scale layer in the heat exchanger is effectively removed, ensuring the cleanliness and efficient operation of the heat exchanger.

[0029] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this invention, and should be understood that the scope of protection of this invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed in this invention without departing from the essence of this invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A rigid spray gun for cleaning titanium dioxide chlorination heat exchangers, characterized in that: It includes a high-pressure pipe connector (1), a stainless steel pipe (2) and a nozzle (3); one end of the high-pressure pipe connector (1) is connected to a high-pressure hose (4), the other end of the high-pressure pipe connector (1) is connected to a stainless steel pipe (2), and the end of the stainless steel pipe (2) away from the high-pressure pipe connector (1) is connected to the nozzle (3).

2. The rigid spray gun for cleaning titanium dioxide heat exchangers according to claim 1, characterized in that: The high-pressure pipe connector (1) has a through hole drilled inside, and the stainless steel pipe (2) is inserted from one end of the through hole and connected by welding at the connection point; the high-pressure pipe connector (1) has an external thread tapped at one end connected to the high-pressure hose (4), and the high-pressure hose (4) is threaded onto the external thread.

3. The rigid spray gun for cleaning titanium dioxide heat exchangers according to claim 2, characterized in that: The joint between the stainless steel pipe (2) and the high-pressure pipe joint (1) is welded with a 30° V-shaped bevel full penetration structure.

4. The rigid spray gun for cleaning titanium dioxide heat exchangers according to claim 2, characterized in that: The gun head (3) has several spray holes (31) at one end; the other end of the gun head (3) is inserted into the stainless steel tube (2) and connected by continuous circumferential welding by manual arc welding.

5. The rigid spray gun for cleaning titanium dioxide heat exchangers according to claim 2, characterized in that: The stainless steel pipe (2) is a seamless stainless steel pipe with a diameter of φ12mm×3mm.

6. The rigid spray gun for cleaning titanium dioxide heat exchangers according to any one of claims 1 to 5, characterized in that: The number of stainless steel pipes (2) is multiple, and the multiple stainless steel pipes (2) are welded in sequence.

7. The rigid spray gun for cleaning titanium dioxide heat exchangers according to claim 6, characterized in that: When welding two adjacent stainless steel pipes (2), a 30° V-shaped bevel is opened at the joint, and a 2mm blunt edge is left at the root. After welding, the inside and outside are fully penetrated, and the weld height is ≤1mm.

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