CN217663370U

CN217663370U - Tubular reactor feeding premixing structure

Info

Publication number: CN217663370U
Application number: CN202221360463.5U
Authority: CN
Inventors: 高向南; 孙睿; 周少华; 杨兵; 古超群; 郭翔宇
Original assignee: Tongling Guoxing Chemical Co ltd
Current assignee: Tongling Guoxing Chemical Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-10-28
Anticipated expiration: 2032-06-01

Abstract

The utility model belongs to the technical field of tubular reactor, especially, tubular reactor feeding mixes structure in advance. The utility model comprises a reactant introducing area and a reaction area which are arranged in sequence, wherein the reactant introducing area comprises a first pipe section and a second pipe section for introducing phosphoric acid, and a liquid outlet of the first pipe section is connected with the reaction area; the first pipe section is vertically connected with the second pipe section, the first pipe section and the second pipe section are of a three-way pipe type structure, a lining pipeline for introducing washing liquid is arranged in the second pipe section, and the distance between the liquid outlet of the lining pipeline and the reaction area is smaller than the distance between the liquid outlet of the second pipe section and the reaction area. The utility model discloses with two fluids along same direction operation for resistance each other reduces greatly, and the fluid contains impurity and is difficult for deposiing the scar in the pipeline.

Description

Tubular reactor feeding premixing structure

Technical Field

The utility model belongs to the technical field of tubular reactor, especially, relate to a tubular reactor feeding premix structure.

Background

The spraying granulation of a tubular reactor is a commonly used granulation process for producing compound fertilizers. According to the design of the tubular reactor, phosphoric acid and washing liquid are mixed in advance before entering the tubular reactor and then enter the tubular reactor to react with other liquid raw materials.

Since phosphoric acid contains a large amount of impurities, the scrubbing liquid for scrubbing the off-gas also contains impurities. When two kinds of fluids are pressed and mixed at the tee joint at a right angle, resistance is formed between the two fluids, the flow rate of the two fluids is reduced, and impurities contained in the two fluids are precipitated and scaled at the tee joint due to the reduction of the flow rate. When water flows into a hole of suitable size, it is deflected to the right by the force of the rotational deflection, so that the water flow develops a counter-clockwise vortex at the orifice. Under the conditions that the viscosity of fluid is large, a moving object is small and slow, the resistance is in direct proportion to the moving speed, the cross section area and the viscosity, phosphoric acid belongs to liquid with large viscosity, and impurities can be quickly deposited and attached after vortex is generated. The pipe diameter of the three-way pipeline is gradually reduced due to excessive scaling, the leakage at the position of the interface flange is caused by overlarge pressure in the three-way pipeline, even the three-way pipeline is completely blocked, and phosphoric acid and washing liquid cannot be normally added. Generally, according to the scabbing degree, the parking, dismounting and cleaning are carried out for 30 minutes to 1 hour, so that the stable operation of the system is influenced, and the labor intensity of production personnel is increased.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a tubular reactor feeding premixing structure. The utility model discloses can avoid phosphoric acid and washing liquid mixed department to appear deposiing the scale deposit.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a tubular reactor feeding premixing structure comprises a reactant introduction area and a reaction area which are sequentially arranged, wherein the reactant introduction area comprises a first pipe section and a second pipe section for introducing phosphoric acid, and a liquid outlet of the first pipe section is connected with the reaction area; the first pipe section is vertically connected with the second pipe section, the first pipe section and the second pipe section are of a three-way pipe type structure, a lining pipeline for introducing washing liquid is arranged in the first pipe section, and the distance between the liquid outlet of the lining pipeline and the reaction area is smaller than the distance between the liquid outlet of the second pipe section and the reaction area.

Preferably, the lining pipe is arranged coaxially with the first pipe section.

Preferably, the distance between the outer wall of the lining pipe and the inner wall of the first pipe section is 1mm.

Preferably, the lined pipe is a teflon lined pipe.

Preferably, an annular sealing element is arranged in the first pipe section; a seal is located between the liner conduit and the first pipe segment for a gap between the liner conduit and the first pipe segment.

Preferably, the tubular reactor is provided with a steam purging device.

The utility model has the advantages of:

(1) The utility model discloses with two fluids along same direction operation for resistance each other reduces greatly, and the fluid contains impurity and is difficult for deposiing the scar in the pipeline.

(2) The utility model discloses an increase the inside lining sleeve pipe and will move the phosphoric acid of mixing in tee bend department originally and mix to the washing liquid mixes to the mixed structure rear end, can prevent phosphoric acid and washing liquid and reduce the condition that leads to two fluid to contain impurity at tee bend department deposit the scab because of the velocity of flow when tee bend department mixes to reduce this department and scar clearance number of times, reduce intensity of labour, improve the rate of driving.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of a conventional structure.

The notations in the figures have the following meanings:

1-reactant introduction zone, 11-first pipe section, 12-second pipe section, 13-lining pipe, 2-reaction zone, 3-sealing element.

Detailed Description

As shown in fig. 1-2, a tubular reactor feed premixing structure comprises a reactant introducing area 1 and a reaction area 2 which are sequentially arranged, wherein the reactant introducing area 1 comprises a first tube section 11 and a second tube section 12 for introducing phosphoric acid, and a liquid outlet of the first tube section 11 is connected with the reaction area 2; the first pipe section 11 is vertically connected with the second pipe section 12, the first pipe section 11 and the second pipe section 12 are of a three-way pipe structure, a lining pipeline 13 for introducing washing liquid is arranged in the first pipe section 11, and the distance between the liquid outlet of the lining pipeline 13 and the reaction area 2 is smaller than the distance between the liquid outlet of the second pipe section 12 and the reaction area 2.

The lining pipe 13 is arranged coaxially with the second pipe section 12. The distance between the outer wall of the lining pipeline 13 and the inner wall of the first pipe section 11 is 1mm, so that contact mixing between phosphoric acid and washing liquid is avoided. Because the lined tetrafluoro pipeline is corrosion resistant and ageing resistant, the lined tetrafluoro pipeline is selected as the lined pipeline 13. An annular sealing element 3 is arranged in the first pipe section 11; the seal 3 is located between the lining pipe 13 and the first pipe segment 11 for the gap between the lining pipe 13 and the first pipe segment 11 to prevent phosphoric acid from flowing into the inlet end of the first pipe segment 11.

It should be noted that, when phosphoric acid gets into first pipeline section 11 from second pipeline section 12, can collide with first pipeline section 11, though there is a small amount of impurity to deposit after the collision, this deposit is less than the deposit that traditional tubular reactor design produced far away, and because phosphoric acid pump pressure is higher, still set up steam purge device in the tubular reactor simultaneously, can be with pipeline section purge intraductal impurity, guarantee the operating duration of reactor, therefore this impurity can be neglected.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. The tubular reactor feed premixing structure is characterized by comprising a reactant introducing area (1) and a reaction area (2) which are sequentially arranged, wherein the reactant introducing area (1) comprises a first pipe section (11) and a second pipe section (12) for introducing phosphoric acid, and a liquid outlet of the first pipe section (11) is connected with the reaction area (2); the liquid outlet of second pipeline section (12) is connected with first pipeline section (11), and first pipeline section (11) is tee bend tubular structure with second pipeline section (12), be equipped with in first pipeline section (11) and introduce inside lining pipeline (13) of washing liquid, the distance of the liquid outlet of inside lining pipeline (13) and reaction area (2) is less than the distance of the liquid outlet of second pipeline section (12) and reaction area (2).

2. The tubular reactor feed premixing structure of claim 1, wherein: the lining pipeline (13) is arranged coaxially with the first pipe section (11).

3. The tubular reactor feed premixing structure of claim 1, wherein: the distance between the outer wall of the lining pipeline (13) and the inner wall of the first pipe section (11) is 1mm.

4. The tubular reactor feed premixing structure of claim 1, wherein: the lining pipeline (13) is a polytetrafluoroethylene lining pipeline.

5. The tubular reactor feed premixing structure of claim 1, wherein: an annular sealing element (3) is arranged in the first pipe section (11); the seal (3) is located between the lining pipe (13) and the first pipe section (11) for a gap between the lining pipe (13) and the first pipe section (11).

6. The tubular reactor feed premixing structure of claim 1, wherein: a steam purging device is arranged in the tubular reactor.