Novel anti-corrosion reaction kettle for producing urea products

Abstract

The utility model discloses a novel anti-corrosion reaction kettle for producing urea products, which comprises a kettle cover and a kettle body which are arranged up and down, the lower end of the kettle cover and the upper end of the kettle body are respectively provided with a connecting flange, an anti-corrosion protection lining is arranged in the kettle body, the lower end of the anti-corrosion protection lining is just positioned above a liquid phase part in the reaction kettle, and the lower end of the anti-corrosion protection lining is connected with the kettle body. The upper end of the anti-corrosion protection lining is provided with a flanging flange which is placed on a kettle cover connecting flange, and an anti-corrosion tightening assembly which is used for enabling the anti-corrosion protection lining to be tightly attached to the interior of the reaction kettle is arranged at the position, close to the lower end, of the anti-corrosion protection lining. The anti-corrosion protection lining is arranged above the liquid phase part in the reaction kettle, and meanwhile, the anti-corrosion protection lining is tightly attached to the interior of the reaction kettle through the anti-corrosion tightening assembly, so that corrosive liquid formed by acid gas entrained with water can be effectively separated from the reaction kettle, the reaction kettle is prevented from being corroded, the service life of equipment is prolonged, and the service life of the equipment is prolonged. And the equipment maintenance or replacement frequency is reduced, so that the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and specifically relates to a new type of anti-corrosion reaction kettle for producing urea products. Background Art

[0002] At present, in the production process of urea products in the chemical industry, the reactor is one of the commonly used equipment. The traditional urea product reactor is made of carbon steel or fully glass-lined material. The reaction carried out in the reactor is the reaction of the main raw material after adding the acylating agent under the condition of dilute alkali solution. At this time, the liquid phase in the reactor is alkaline, and acidic gas is generated in the part above the liquid phase. The acidic gas easily entrains water to form a strong acid to corrode the reactor above the liquid phase. Among them, the carbon steel reactor is very easy to be corroded and leaked, and the fully glass-lined reactor is not alkali-resistant. During use, the glass lining gradually starts to be damaged from the part below the liquid phase material until the part above the liquid phase material is completely damaged, resulting in the life of the reactor being less than one year, so the equipment needs to be repaired or replaced. In order to solve this problem, the reactor needs to be upgraded with anti-corrosion treatment. Existing anti-corrosion technologies mainly include coating anti-corrosion and the use of special materials, but these methods have problems such as unsatisfactory anti-corrosion effect and high cost. Utility Model Content

[0003] The utility model aims to provide a novel anti-corrosion reactor for producing urea products in view of the problems existing in the prior art, thereby ensuring the anti-corrosion ability of the reactor, extending the service life of the reactor and reducing the frequency of equipment maintenance and replacement.

[0004] To this end, the technical solution adopted by the utility model is: a new type of anti-corrosion reactor for producing urea products, comprising a reactor cover and a reactor body arranged upper and lower, the lower end of the reactor cover and the upper end of the reactor body are both provided with connecting flanges, an anti-corrosion protective lining is provided in the reactor body, the lower end of the anti-corrosion protective lining is just located above the liquid phase part in the reactor, the upper end of the anti-corrosion protective lining is provided with a flanged flange for being placed on the reactor cover connecting flange, and a corrosion-resistant tightening component for making the anti-corrosion protective lining close to the lower end is provided on the anti-corrosion protective lining.

[0005] As a preferred embodiment of the above scheme, the anti-corrosion tightening assembly includes an inner hoop with a tension adjustment function, and the inner hoop is fixed to the inner side of the anti-corrosion protective lining by at least two fixing strips arranged at circumferential intervals.

[0006] Further preferably, the inner hoop ring includes at least two inner hoop arc rings that can form a circular ring, both ends of each inner hoop arc ring are provided with mounting ears extending inward, the mounting ears of adjacent inner hoop arc rings are connected by a bolt assembly that can adjust the distance between the inner hoop arc rings, and each inner hoop arc ring is fixed to the inner side of the anti-corrosion protective lining by at least two spaced-apart fixing strips.

[0007] Further preferably, the anti-corrosion protection lining is made of PTFE material, the kettle cover is made of glass lining, and the inner hoop is made of a steel ring with F40 anti-corrosion coating.

[0008] The beneficial effects of the utility model are as follows: by arranging an anti-corrosion protective lining above the liquid phase part in the reactor, and the anti-corrosion protective lining is tightly attached to the reactor through an anti-corrosion tightening component, the corrosive liquid formed by acidic gas entrained with water can be effectively separated from the reactor, preventing the reactor from being corroded, thereby extending the service life of the equipment, reducing the frequency of equipment maintenance or replacement, and further reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the utility model. DETAILED DESCRIPTION

[0010] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0011] like Figure 1 As shown, a new type of anti-corrosion reactor for producing urea products is mainly composed of a reactor cover 1, a reactor body 2, an anti-corrosion protective lining 3 and an anti-corrosion tightening assembly, wherein the reactor cover 1 and the reactor body 2 are arranged up and down. To facilitate the installation of the reactor cover and the reactor body, the lower end of the reactor cover 1 and the upper end of the reactor body 2 are bent outward to form a connecting flange a. The anti-corrosion protective lining 3 is arranged in the reactor body 2, and the lower end of the anti-corrosion protective lining 3 is just above the liquid phase in the reactor. To facilitate the installation of the anti-corrosion protective lining 3, a flanged flange 3a for being placed on the connecting flange of the reactor cover is arranged at the upper end of the anti-corrosion protective lining 3. During installation, the flanged flange is placed on the connecting flange of the reactor body, and then the two connecting flanges and the flanged flange are connected by a bolt assembly.

[0012] In order to ensure that the anti-corrosion protective lining can fit tightly inside the kettle body and to isolate the corrosive liquid formed by acidic gas entrained with water from the kettle body, an anti-corrosion tightening component is provided near the lower end of the anti-corrosion protective lining 3 to make the anti-corrosion protective lining fit tightly inside the reactor. The anti-corrosion tightening component prevents acidic gas from entering between the kettle body and the anti-corrosion protective lining during the rising process, and also prevents the anti-corrosion protective lining from delamination and bulging.

[0013] The anticorrosion tightening assembly specifically includes an inner hoop 4 with a tension adjustment function, and the inner hoop 4 is fixed on the inner side of the anticorrosion protection lining 3 by at least two fixing strips 5 arranged at intervals in the circumferential direction. In the specific implementation, the upper and lower ends of the fixing strips are directly glued to the anticorrosion protection lining. In order to realize the tension adjustment function of the inner hoop, the inner hoop 4 includes at least two inner hoop arc rings that can form a circular ring, and both ends of each inner hoop arc ring are provided with mounting ears extending inward, and the mounting ears of adjacent inner hoop arc rings are connected by a bolt assembly (not shown in the figure) that can adjust the distance between the inner hoop arc rings, wherein the bolt assembly includes a bolt and a nut located on both sides of each mounting ear, and the distance between adjacent inner hoop arc rings is adjusted by changing the distance between the nuts located between the two mounting ears, thereby realizing the tension adjustment of the inner hoop, so that it can better press the anticorrosion protection lining on the kettle body. Preferably, each inner hoop arc ring is fixed on the inner side of the anticorrosion protection lining 3 by at least two fixing strips 5 arranged at intervals.

[0014] Furthermore, the anti-corrosion protection lining 3 is made of PTFE material, the kettle cover 1 is made of glass lining, and the inner hoop 4 is made of a steel ring with F40 anti-corrosion coating.

Claims

1. A novel anti-corrosion reactor for producing urea products, comprising a reactor cover (1) and a reactor body (2) arranged above and below, wherein the lower end of the reactor cover (1) and the upper end of the reactor body (2) are both provided with connecting flanges (a), characterized in that: An anti-corrosion protective lining (3) is arranged in the kettle body (2), the lower end of the anti-corrosion protective lining (3) is just located above the liquid phase in the reactor, the upper end of the anti-corrosion protective lining (3) is provided with a flanged flange (3a) for being placed on the kettle cover connecting flange, and an anti-corrosion tightening component for making the anti-corrosion protective lining tightly fit in the reactor is arranged near the lower end of the anti-corrosion protective lining (3).

2. The novel anti-corrosion reactor for producing urea products according to claim 1, characterized in that: The anti-corrosion tightening assembly comprises an inner hoop (4) with a tension adjustment function, and the inner hoop (4) is fixed on the inner side of the anti-corrosion protective lining (3) by at least two fixing strips (5) arranged at intervals in the circumferential direction.

3. The novel anti-corrosion reactor for producing urea products according to claim 2 is characterized in that: The inner hoop ring (4) comprises at least two inner hoop arc rings that can form a circular ring, and both ends of each inner hoop arc ring are provided with mounting ears extending inward, and the mounting ears of adjacent inner hoop arc rings are connected by a bolt assembly that can adjust the distance between the inner hoop arc rings, and each inner hoop arc ring is fixed to the inner side of the anti-corrosion protective lining (3) by at least two fixing strips (5) arranged at intervals.

4. The novel anti-corrosion reactor for producing urea products according to claim 2 is characterized in that: The anti-corrosion protection lining (3) is made of PTFE material, the kettle cover (1) is made of glass lining, and the inner hoop (4) is made of a steel ring with F40 anti-corrosion coating.

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