Crystallizer liquid level meter flushing equipment

Abstract

The utility model relates to a crystallizer liquid level meter flushing device which comprises a crystallizer provided with an upper liquid level meter lead-out port and a lower liquid level meter lead-out port. And a lower liquid level instrument outlet is provided with a device wall flange, an annular gasket, a lower pressure guide flange and a lower pressure guide diaphragm capsule. The lower pressure guiding diaphragm capsule is fixed on the lower pressure guiding flange, the lower pressure guiding flange and the device wall flange are installed in a matched mode, and the lower pressure guiding diaphragm capsule is inserted into a liquid level meter sleeve of a lower liquid level meter guiding outlet. The annular gasket is installed between the lower pressure guiding flange and the device wall flange, the annular gasket is provided with a small flushing water hole, the small flushing water hole is connected with a flushing water pipeline, and a forward annular flushing channel is formed between the lower pressure guiding diaphragm capsule and the liquid level meter sleeve. According to the utility model, the flushing water is changed into buffering forward annular flushing from outside to inside, so that the hidden danger of damage to the stirrer caused by scabbing and the problem of liquid level failure are eliminated, and the running cycle of the crystallizer is favorably prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial production equipment and relates to a crystallizer auxiliary device, in particular to a crystallizer liquid level gauge flushing device. Background Art

[0002] The rearrangement crystallization device uses cyclohexanone oxime as raw material, the target product is crude amide oil, and the by-product is ammonium sulfate. The DTB type (draft tube baffle) crystallizer is the core equipment of the device and the basis of the ammonium sulfate crystallization device. The upstream intermediate product rearrangement reaction liquid (containing liquid sulfuric acid, caprolactam and other substances) enters the crystallizer, where it reacts chemically with ammonia gas and sulfuric acid directly to generate ammonium sulfate crystals and separate the amide oil. In order to prevent the positive pressure side diaphragm box of the liquid level gauge from being blocked and malfunctioning due to the coverage of ammonium sulfate crystals, a flushing pipe is designed. The flushing pipe is perpendicular to the wall and protrudes 60 cm before turning 180° to directly point to the diaphragm box. The following two problems often occur during operation: ① Ammonium sulfate crystals are easy to precipitate on the surface of the protruding pipeline, and the surface of the flushing pipeline and the wall surface of the nearby equipment are severely scarred. After the large scar blocks fall off, they directly hit the blades of the agitator at the bottom of the crystallizer, damaging the blades and causing unplanned shutdowns. ② Abnormal indication of the crystallizer liquid level instrument: Long-term direct flushing with 700kPa pressure flushing water caused damage to the pressure-inducing diaphragm box under the on-site instrument and silicone oil leakage, which in turn caused abnormal indication of the crystallizer liquid level instrument, seriously affecting the normal production and production safety of the device. Utility Model Content

[0003] The utility model aims to provide a crystallizer liquid level gauge flushing device, optimize the structure of the liquid level gauge flushing water outlet, ensure the normal indication of the liquid level indicator, extend the service life of the positive pressure side diaphragm box of the instrument, avoid the hidden danger of large scar blocks falling off after scarring and causing damage to the agitator, and extend the operation cycle of the crystallizer.

[0004] The technical solution of the utility model is: a crystallizer liquid level gauge flushing device, comprising a crystallizer, wherein the crystallizer is provided with an upper liquid level instrument outlet and a lower liquid level instrument outlet. The lower liquid level instrument outlet is provided with a vessel wall flange, an annular gasket, a lower pressure-inducing flange and a lower pressure-inducing diaphragm box. The lower pressure-inducing diaphragm box is fixed on the lower pressure-inducing flange, the lower pressure-inducing flange is installed in cooperation with the vessel wall flange, and the lower pressure-inducing diaphragm box is inserted into the liquid level gauge casing of the lower liquid level instrument outlet. The annular gasket is installed between the lower pressure-inducing flange and the vessel wall flange, the annular gasket is provided with a flushing water hole, the flushing water hole is connected to the flushing water pipeline, and a forward annular flushing channel is formed between the lower pressure-inducing diaphragm box and the liquid level gauge casing.

[0005] The ring gasket is made of stainless steel. The flushing water hole has a diameter of 15 mm.

[0006] The utility model of the crystallizer liquid level gauge flushing equipment optimizes the structure of the liquid level gauge flushing equipment by changing the flushing water direct flushing mode from inside to outside to buffered forward annular flushing from outside to inside. Its beneficial effects are: ① It eliminates the hidden danger of damage to the agitator caused by the falling of large scar blocks after scarring, avoids unplanned shutdown of the device, and is conducive to extending the operation cycle of the crystallizer. ② The flushing water enters the small hole of the annular gasket for buffered annular flushing, eliminating the problem of liquid level failure. ③ The flushing water does not directly flush the pressure-inducing diaphragm box, avoiding damage to the diaphragm box, which is conducive to extending the life of the pressure-inducing diaphragm box. ④ It reduces the frequency of operators adjusting the flushing volume and reduces labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a structural schematic diagram of the crystallizer liquid level gauge flushing device of the utility model;

[0008] Figure 2 is a schematic diagram of the structure of the annular gasket;

[0009] Figure 3 for Figure 2 A top view of

[0010] Figure 4 It is a schematic diagram of a flushing port of a liquid level gauge in the prior art;

[0011] Among them: 1-crystallizer, 2-agitator blades, 3-lower pressure flange, 4-annular gasket, 5-wall flange, 6-flushing water hole, 7-flushing water pipeline, 8-lower liquid level instrument outlet, 9-flushing elbow, 10-lower pressure diaphragm box, 11-liquid level meter casing, 12-scar. DETAILED DESCRIPTION

[0012] The utility model is described in detail below with reference to the embodiments and drawings. The protection scope of the utility model is not limited to the embodiments, and any changes made by those skilled in the art within the scope defined by the claims also fall within the protection scope of the utility model.

[0013] The utility model crystallizer liquid level gauge flushing device is as follows Figure 1 As shown, it includes a crystallizer 1, which is provided with an upper liquid level instrument outlet and a lower liquid level instrument outlet. The lower liquid level instrument outlet is equipped with a wall flange 5, an annular gasket 4, a lower pressure-inducing flange 3 and a lower pressure-inducing membrane box 10. The lower pressure-inducing membrane box is fixed on the lower pressure-inducing flange, and the lower pressure-inducing flange is installed in conjunction with the wall flange. The lower pressure-inducing membrane box is inserted into the level gauge sleeve 11 of the lower liquid level instrument outlet, and the annular gasket is installed between the lower pressure-inducing flange and the wall flange. Figure 2 , Figure 3As shown, the annular gasket is provided with a flushing water hole 6, the annular gasket 4 is made of stainless steel, and the flushing water hole has a diameter of 15 mm. The flushing water hole is connected to the flushing water pipeline 7, forming a forward annular flushing channel between the lower pressure-inducing membrane box and the level gauge casing.

[0014] During the production and operation of the crystallizer, the flushing water in the flushing water pipeline enters the flushing channel between the pressure-inducing diaphragm box and the level gauge sleeve through the flushing water holes 6 on the annular gasket 4 to form a forward annular flushing. The flushing water is buffered at the sleeve, reducing the impact on the diaphragm box and ensuring the service life of the diaphragm box. In addition, there will be no scarring, eliminating the hidden danger of large scar blocks falling off and causing damage to the agitator blades, avoiding unplanned shutdowns, and helping to extend the crystallizer operation cycle.

[0015] The utility model is also applicable to the modification of the existing device crystallizer liquid level gauge flushing equipment. Figure 4 , the scarring around the flushing elbow is serious. During the technical transformation, the flushing elbow is first removed, and the inner surface of the crystallizer wall is welded, flattened and polished. Figure 1 Just install the crystallizer liquid level gauge flushing device of the utility model as shown.

Claims

1. A crystallizer level gauge flushing device, characterized by: The device comprises a crystallizer (1), on which an upper liquid level meter outlet and a lower liquid level meter outlet (8) are provided; the lower liquid level meter outlet is provided with a wall flange (5 ) , Ring gasket (4 ) , the lower pressure-inducing flange (3) and the lower pressure-inducing membrane box (10 ) The lower pressure-inducing diaphragm box is fixed on the lower pressure-inducing flange, and the lower pressure-inducing flange is installed in cooperation with the vessel wall flange; the lower pressure-inducing diaphragm box is inserted into the level gauge sleeve (11) of the lower liquid level instrument outlet, and the annular gasket is installed between the lower pressure-inducing flange and the vessel wall flange; the annular gasket is provided with a flushing water hole (6), and the flushing water hole is connected to the flushing water pipeline (7), so as to form a forward annular flushing channel between the lower pressure-inducing diaphragm box and the level gauge sleeve.

2. The crystallizer level gauge flushing device according to claim 1 is characterized in that: The material of the annular gasket (4) is stainless steel.

3. The crystallizer liquid level gauge flushing device according to claim 1 is characterized in that: The diameter of the flushing water hole (6) is 15 mm.

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