CN201722316U - Feeding device - Google Patents

Abstract

The utility model relates to a feeding device for adding initiators at polymerization stage of nitrile butadiene rubber, which comprises a meter. A discharge pipe of the meter is connected to the upper portion of a reactor, a first valve is serially connected onto the discharge pipe close to the meter, a bypass pipe is connected to a downstream position of the first valve on the discharge pipe, and the other end of the bypass pipe is connected with a nitrogen stripping device. The first valve is opened to extract materials in the meter by aid of vacuity in the reactor, and is closed according to metering of the meter, then the nitrogen stripping device is used to blow nitrogen into the discharge pipe to blow the residual materials in the pipe into the reactor, thereby addition of the materials is approximately matched with the metering of the meter, addition of the materials can be more accurately controlled, and also the discharge pipe is cleared and blockage of the pipe by the materials is avoided.

Description

Feeding device

Technical field

The utility model relates to the feeding device that uses in a kind of Chemical Manufacture, is specifically related to a kind of feeding device that adds initiator at the paracril polymerization stage.

Background technology

In the paracril polymerization process, need to add the polyreaction between initiator initiation divinyl and the vinyl cyanide.Existing initiator feeding device comprises gauger, and the discharge pipe of gauger is connected to reactor top, and valve pilot piping break-make is set on the pipeline; When need adding initiator, open the valve on the discharge pipe of gauger, then the reactor inner chamber is vacuumized, utilize vacuum tightness to provide power that the initiator in the gauger is drawn in the reactor; The add-on of initiator is measured by gauger.

But, after the gauger metering shows that the initiator add-on is enough, valve on the pipeline is closed, must have residual initiator so in the pipeline can not be added in the reactor, bring error so not only for the metering of initiator, influence technic index, and remain in the also easy blocking pipe of initiator in the pipeline, be not easy to repeat to feed in raw material, influence is produced and is carried out smoothly.

Summary of the invention

The purpose of this utility model just provides a kind of metering feeding device more accurately.

The technical scheme that is adopted is: a kind of feeding device, comprise gauger, the discharge nozzle of gauger is connected to reactor top, on the discharge nozzle near the position of gauger first valve of connecting, the downstream position of first valve connects bypass pipe on the described discharge nozzle, and the other end of bypass pipe is connected with nitrogen stripping device.

As shown from the above technical solution: when using feeding device reinforced, extract material by the vacuum tightness in the reactor earlier, close first valve according to the metering of gauger, use nitrogen stripping device nitrogen blowing in discharge nozzle then, material residual in the pipeline is blown in the reactor, so not only make the add-on of material and the metering of gauger be tending towards identical, the add-on of material is controlled more accurately; And clear and coherent discharge nozzle, avoid pipeline to be stopped up by material.

Description of drawings

Fig. 1 is a synoptic diagram of the present utility model.

Embodiment

Referring to Fig. 1, feeding device of the present utility model, comprise gauger 1, the discharge nozzle of gauger 1 is connected to reactor 2 tops, connect first valve 3 on this discharge nozzle, be used for the pilot piping break-make, the downstream position of first valve 3 connects bypass pipe, the other end of bypass pipe is connected with nitrogen stripping device 5, is blown into nitrogen during 5 work of nitrogen stripping device in bypass pipe and discharge nozzle.

During use, extract initiator or other similar material by the vacuum tightness in the reactor 2 earlier, metering result according to gauger 1 closes first valve 3 in good time, use nitrogen stripping device 5 nitrogen blowing in discharge nozzle then, material residual in the pipeline can be blown in the reactor 2, make that not only the metering of the add-on of material and gauger 1 is more identical, make material proportion more meet processing requirement; And the stripping process clear and coherent discharge nozzle, avoid pipeline to be stopped up by material add material so that reuse feeding device.Obviously, can be long more on the discharge nozzle of gauger 1 by the pipeline of stripping, then the outflow of the material in the discharge nozzle is clean more, and discharge nozzle also is difficult for blocked more; So just need first valve 3 as far as possible near gauger 1, the connection section of bypass pipe and discharge nozzle is as far as possible near first valve 3.

When nitrogen stripping device 5 is not worked, bypass pipe is similar to one section blind pipe, material in the discharge nozzle is difficult to enter bypass pipe usually, but unobstructed in order to ensure bypass pipe, had better be connected nitrogen valve 6 with the junction of discharge nozzle by close its on bypass pipe, so that during 5 work of nitrogen stripping device, nitrogen valve 6 is opened, discharge nozzle is by after clear and coherent, close nitrogen valve 6, so just can guarantee that material can't enter bypass pipe all the time, guarantee that not only bypass pipe is unobstructed, avoid a small amount of material to enter the bypass pipe condensation simultaneously, crystallization enters influence production in the reactor 2 then.

Better, can also connect strainer 7 on the discharge nozzle of described gauger 1, strainer 7 is arranged between first valve 3 and the bypass pipe, second valve 8 of correspondingly connecting on the discharge nozzle between strainer 7 and the bypass pipe; Strainer 7 is used for the impurity of filter material, mainly be exactly crystal or the caking thing that material forms when stopping in gauger 1, the strainer 7 and second valve 8 are positioned at the upstream position of bypass pipe on the discharge nozzle, purpose is exactly when 5 work of nitrogen stripping device, close second valve 8, in order to avoid the screen cloth of nitrogen impact filter 7, and damage this screen cloth.Under this structure, the connection section of aforesaid bypass pipe and discharge nozzle is near first valve 3 in fact just: on the discharging pipeline of gauger 1, first valve 3 is near the discharge port of gauger 1, strainer 7 is near first valve 3, second valve 8 is near strainer 7, and bypass pipe is near second valve 8; Just still make it possible to the longest by the length of the discharge nozzle of nitrogen stripping.

Because the material that is added often is a mixture, so for the ease of the allotment material, feeding device of the present utility model preferably also comprises blender loader 9, blender loader 9 can be the container an of jar or bucket and so on, its bottom is provided with bleeder valve 10, bleeder valve 10 usefulness pipelines are communicated to gauger 1 inner chamber by gauger 1 upper end, like this blender loader 9 are arranged in the position that is higher than gauger 1, open bleeder valve 10 after material prepares and material can be put into gauger 1; The use of whole like this device is just convenient.Further, the position that is higher than reactor 2 with the location arrangements of gauger 1, the discharge nozzle of gauger 1 extends downwards, its lower end is connected reactor 2 upper ends, avoid materials in the reactor 2 when being stirred, to be splashed in the discharge nozzle like this and blocking pipe also more helps all outflows naturally of material in the discharge nozzle; Can also be on discharge nozzle near the position of reactor 2 the 3rd valve 4 of connecting, close this valve 4 after the material emptying in the pipeline, just realized the isolated of discharge nozzle inner chamber and reactor 2 inner chambers, the possibility of having avoided reactor 2 interior materials to enter feed-pipe fully.

Such feeding device, the material add-on can accurately be controlled, and good reliability is not only applicable to add materials such as initiator in rubber production, can be used for food, medicine or other chemical industry yet and become the product field to be used to add material.

Claims (4)

1. feeding device, comprise gauger (1), the discharge nozzle of gauger (1) is connected to reactor (2) top, connect first valve (3) on this discharge nozzle, it is characterized in that: the downstream position of first valve (3) on the described discharge nozzle connects bypass pipe, and the other end of bypass pipe is connected with nitrogen stripping device (5).

2. feeding device according to claim 1, it is characterized in that: the position near discharge nozzle on the described bypass pipe connects nitrogen valve (6), described first valve (3) is near gauger (1), and the connection section of described bypass pipe and discharge nozzle is near first valve (3).

3. feeding device according to claim 1, it is characterized in that: connect strainer (7) on the described discharge nozzle, strainer (7) is positioned between first valve (3) and the bypass pipe, second valve (8) of connecting on the discharge nozzle between strainer (7) and the bypass pipe.

4. feeding device according to claim 2, it is characterized in that: described feeding device comprises blender loader (9), between blender loader (9) and the gauger (1) pipeline is set, this pipeline extends downwards, and bleeder valve (10) lower end of pipeline upper end connection blender loader (9) is connected the upper end of gauger (1); The discharge nozzle of described gauger (1) extends downwards, and its lower end is connected reactor (2) upper end, on the discharge nozzle near the position of reactor (2) the 3rd valve (4) of connecting.