CN201921644U

CN201921644U - Anti-siphon jet pumping device for ammonium nitrate solution storage tank

Info

Publication number: CN201921644U
Application number: CN2010206809746U
Authority: CN
Inventors: 苏明阳; 周荣光; 马丽玲; 徐建
Original assignee: FUJIAN HAIXIA TECHNOLOGY Co Ltd
Current assignee: FUJIAN HAIXIA TECHNOLOGY Co Ltd
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2011-08-10
Anticipated expiration: 2020-12-27

Abstract

An anti-siphon jet pumping device for an ammonium nitrate solution storage tank relates to a chemical solution jet stir pumping device, comprises a tank body, a work pump, a material discharge pipe, an out-tank return pipe, an in-tank return pipe and a jet spray nozzle, and is characterized in that a through hole with aperture theta ranging from 6 to 8 mm is formed on a pipe wall above the highest liquid level which is set after the in-tank return pipe stretches into the storage tank. The anti-siphon jet pumping device has the following advantages: the small through hole, which remains in the flowing or evacuated state of the solution, is free from crystallization clogging, and can effectively act as a vacuum breaker to prevent siphon phenomenon from happening; the anti-siphon jet pumping device is simple and convenient to process and install, requires no valve in any form, and can save the valve cost and maintenance cost; and the anti-siphon jet pumping device is easy in principle and reliable in operation, can be controlled without a PLC (Programmable Logic Controller), and requires no manual operation.

Description

A kind of ammonium nitrate solution storage tank is prevented the siphon jet pumping installations

Technical field:

The utility model relates to a kind of device that prevents the solution siphon in the jet stirring pumping device of chemical industry solutions jet stirring pumping device, particularly ammonium nitrate solution.

Background technology:

The common insulation of the raw material ammonium nitrate solution (more than 110 ℃) that present commercial explosive is used is stored in the big volume storage tank standby, according to storage safe and technological requirement, must carry out intermittence and stir.Consider ammonium nitrate solution high temperature, be easy to characteristics such as crystallization and storage tank tank body size are bigger, adopt the jet alr mode to carry out intermittence usually and stir.

Traditional jet stirs the pipe-line system of partly being made of a sealing working barrel, return duct, drainage conduit, jet nozzle etc., liquid is by the drainage conduit working barrel of flowing through in the storage tank, be pumped into a jar exteenal reflux pipe by working barrel again, enter the jet nozzle that is immersed in jar interior return duct end in the storage tank solution in the storage tank and spray at a high speed, make the interior solution of storage tank effectively mix stirring.Wherein working barrel, return duct, drainage conduit are the pumping installations of jet stirring system.

In order in time to understand the liquid level of the solution in the storage tank, so that grasp solution material stock situation in the storage tank, the solution tank designs becomes vertical form usually.And working barrel is in low level usually in the pumping installations of jet stirring system, is convenient to liquid in the solution storage tank and flows automatically to and carry out pumping in the working barrel.So the liquid in the return duct begins up to deliver to the storage tank tank deck from the working barrel of low level, down send into again and stir solution in the storage tank, carry out jet and stir.So a whole set of return duct shape looks like down " U " font, the solution of the lower outside storage tank in tank deck inserts jar.Behind the pumping end-of-job, when closing working barrel, the solution emptying downwards under the effect of deadweight in the jar exteenal reflux pipe of outer this side of working barrel of storage tank is owing to exist siphonage, this moment very easily with the solution siphon of the high temperature corrosion in the storage tank to storage tank, cause unsafe factor.

Chinese patent " a kind of ammonium nitrate solution jet stirs the pumping installations of the usefulness " (patent No.: ZL201020162764.8), after preventing the system closing submerged pump, solution in the storage tank flows backward in the return tank and the siphonage that produces, in the eminence of return duct the vacuum breaker device has been installed.This vacuum breaker device is made up of a magnetic valve, and the switching circuit of magnetic valve is connected with the PLC control system.After finishing the jet stirring that once circulates, open magnetic valve by control system, return line is carried out emptying, make its vacuum breaker, avoid the generation of siphonage.

Because ammonium nitrate solution is easy to crystallization, when using this vacuum breaker device, there is following defective: the one, in the jet whipping process, be full of ammonium nitrate solution in the return duct all the time, these solution also can be full of in the magnetic valve of vacuum breaker device.The time that jet stirs if once circulate is longer, and when particularly temperature was low, these solution can be lowered the temperature, crystallization is in magnetic valve, magnetic valve can't be moved, cause the vacuum breaker failure of apparatus, the solution in the storage tank will flow backward in the return tank continuously, have major safety risks.The 2nd, magnetic valve is installed in eminence, and after crystallization was stopped up, it was bigger to deal with difficulty.

Summary of the invention:

The purpose of this utility model is to overcome above-mentioned defective, provides a kind of ammonium nitrate solution storage tank to prevent the siphon jet pumping installations.

Scheme of the present utility model is: comprise tank body, working barrel, drainage conduit, jar exteenal reflux pipe, jar in return duct, jet nozzle, it is characterized in that: return duct stretches into the through hole of offering an aperture Φ 6mm-8mm on the tube wall above the high liquid level (HLL) of setting behind the storage tank in jar.

Advantage of the present utility model is:

One, because aperture is in the flow regime or the emptying state of solution all the time, the crystallization clogging can not take place, can effectively bring into play the vacuum breaker effect, prevent the generation of siphonage;

Two, this method processing, install simple and conveniently, need not use any type of valve, can save the cost and the maintenance cost of valve;

Three, this method principle is simple, reliable, need not control by PLC, also need not manually-operated.

Description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 is the tank body cross-sectional schematic.

Fig. 3 is the A-A cutaway view of Fig. 2.

The specific embodiment:

Structure of the present utility model comprise tank body 2, working barrel 5, drainage conduit 4, jar exteenal reflux pipe 1, jar in return duct 3, jet nozzle, it is characterized in that: return duct 3 stretches into the through hole 6 of offering an aperture Φ 6mm-8mm on the tube wall above the high liquid level (HLL) of setting behind the storage tank in jar.

Implementation process should be noted that following some: one, because jet when stirring, the solution in the return duct can be spouting from this aperture under the effect of working barrel 5, so this aperture must be out in storage tank; Two, the aperture position must be in storage tank high liquid level (HLL) above, guarantee not submerged by solution; Three, the aperture of this vacuum breaker aperture must be suitable, should be between Φ 6mm-8mm.Excessive flow and the pressure that then influences solution in the return duct influences mixing effect; Too smallly then stopped up by solution crystallization easily, cause vacuum breaker to lose efficacy.

Finish the jet stirring that once circulates, after working barrel 5 quit work, the outer air of return duct can enter return duct by the vacuum breaker aperture, to carrying out vacuum breaker in the return duct.Flow of solution in the return duct is to both sides, and the solution in the return duct of the storage tank outside flows to working barrel 5 ends under the effect of deadweight, and the solution in the storage tank in the return duct 3 flows in the storage tank under the effect of deadweight.Return duct can be in emptying state automatically like this, siphonage can not occur.

Claims

1. an ammonium nitrate solution storage tank is prevented the siphon jet pumping installations, comprise tank body (2), working barrel (5), drainage conduit (4), jar exteenal reflux pipe (1), jar in return duct (3), jet nozzle, it is characterized in that: return duct in jar (3) stretches into the through hole (6) of offering an aperture Φ 6mm-8mm on the tube wall of the high liquid level (HLL) top of setting behind the storage tank.