CN205850808U - Catalyst injection device - Google Patents

Abstract

The utility model provides a catalyst injection device. The catalyst injection device includes: a reactor, a catalyst feeding pipeline and a mineral oil flushing pipeline, the reactor has a nozzle; the catalyst feeding pipeline is connected to the nozzle; the mineral oil flushing pipeline is connected to the nozzle. By adding a mineral oil flushing line connected to the nozzle of the reactor, since the mineral oil entering the reactor has no effect on the polymerization reaction and product quality, it can be realized that when the catalyst injected into the catalyst feed line blocks the nozzle or the nozzle feed is abnormal When the production is affected, the mineral oil from the mineral oil flushing pipeline is used to flush the nozzles online in time, and the nozzles can be used normally after dredging, so as to avoid the economic loss caused by the shutdown of the reaction caused by nozzle blockage and improve the efficiency of the reaction device. operation stability.

Description

Catalyst injection device

technical field

The utility model relates to the field of polypropylene production equipment, in particular to a catalyst injection device.

Background technique

The catalyst injection process in the existing Innovene polypropylene unit is shown in Figure 1. The Innovene polypropylene reactor 10' has 4 nozzles 11' in all, 2 for use and 2 for standby, and the liquid propylene flushing pipeline 60' is for the nozzle 11' to flush propylene to prevent the backup nozzle 11' from clogging. The catalyst feed line 20' is used to inject catalyst into the nozzle 11'. When the nozzle 11' in use is blocked, only the spare nozzle 11' can be used, and the blocked nozzle 11' can only be cleared when the reactor is shut down. , once the four nozzles 11' are all blocked, the reactor can only be stopped, which will cause serious economic losses to the enterprise.

Utility model content

The main purpose of the utility model is to provide a catalyst injection device to solve the problem in the prior art that the production efficiency of the enterprise is affected when the catalyst injection nozzle is blocked.

In order to achieve the above object, the utility model provides a catalyst injection device, the catalyst injection device includes: a reactor, a catalyst feed line and a mineral oil flushing line, the reactor has a nozzle; the catalyst feed line is connected to the nozzle; The oil flushing line communicates with the nozzle.

Further, the catalyst injection device further includes: a mineral oil storage tank, and the mineral oil storage tank is communicated with the nozzle through a mineral oil flushing pipeline.

Further, a mineral oil pump is also arranged on the mineral oil flushing pipeline.

Further, a one-way valve is also arranged on the mineral oil flushing pipeline, and the one-way valve is arranged downstream of the mineral oil pump along the flow direction of the mineral oil.

Further, a pressure gauge is also arranged on the mineral oil flushing pipeline, and the pressure gauge is arranged between the mineral oil pump and the one-way valve.

Further, a flow meter is also arranged on the mineral oil flushing pipeline, and the flow meter is arranged between the mineral oil pump and the one-way valve.

Further, the catalyst injection device further includes: a liquid propylene flushing pipeline, which is connected to the nozzle.

Further, the catalyst injection device further includes: a catalyst delivery main pipe, a catalyst feed line, a mineral oil flushing line, and a liquid propylene flushing line respectively connected to the nozzle through the catalyst delivery main pipe.

Further, a feed valve is set on the catalyst feed pipeline.

Further, a flushing valve is arranged on the liquid propylene flushing pipeline.

Applying the technical scheme of the utility model, by adding a mineral oil flushing pipeline connected with the nozzle of the reactor, since the mineral oil entering the reactor has no influence on the polymerization reaction and product quality, it can be realized that when the catalyst feed pipeline injects the catalyst When the nozzle is clogged or the feeding of the nozzle is abnormal and the production is affected, the mineral oil from the mineral oil flushing pipeline is used to flush the nozzle online in time. economic loss and improve the operational stability of the reactor.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Figure 1 shows a schematic diagram of the catalyst injection device in the production of Innovene polypropylene in the prior art; and,

Fig. 2 shows a schematic diagram of the catalyst injection device in the production of Innovene polypropylene in a preferred embodiment of the present invention.

Wherein, the above-mentioned accompanying drawing 1 includes the following reference signs:

10', reactor; 11', nozzle; 20', catalyst feed line; 60', liquid propylene flushing line;

Above-mentioned accompanying drawing 2 includes following reference signs:

10. Reactor; 11. Nozzle; 20. Catalyst feeding pipeline; 40. Mineral oil flushing pipeline; 60. Liquid propylene flushing pipeline; 80. Catalyst delivery main pipe;

41. Mineral oil storage tank; 42. Mineral oil pump; 43. Pressure gauge; 44. Flow meter; 45. One-way valve.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As mentioned in the background technology, there is a problem of nozzle clogging in the Innovene polypropylene plant in the prior art, and the clogged nozzles can only be cleaned when they are shut down. When all 4 nozzles are blocked, the reactor can only be shut down. , causing serious economic losses to the enterprise. In order to improve this situation, in a typical implementation of the utility model, as shown in Figure 2, a catalyst injection device is provided, the catalyst injection device includes: reactor 10, catalyst feed line 20 and mineral oil flushing A pipeline 40, wherein the reactor 10 includes a nozzle 11; the catalyst feed line 20 communicates with the nozzle 11; the mineral oil flushing pipeline 40 communicates with the nozzle 11.

The above catalyst injection device of the present utility model, by adding the mineral oil flushing pipeline 40 connected with the nozzle 11 of the reactor 10, since the mineral oil entering the reactor 10 has no influence on the polymerization reaction and product quality, it can be realized when the catalyst enters When the catalyst injected into the feed line 20 blocks the nozzle 11 or the feeding of the nozzle 11 is abnormal and affects production, the mineral oil from the mineral oil flushing line 40 is used to flush the nozzle 11 online in time, and the nozzle 11 can be used normally after dredging, thereby avoiding The economic loss caused by the stoppage of the reaction caused by the blockage of the nozzle 11 improves the operation stability of the reaction device.

Preferably, the above-mentioned catalyst injection device further includes: a mineral oil storage tank 41 , the mineral oil storage tank 41 communicates with the nozzle 11 through the mineral oil flushing line 40 , so as to ensure the stability of the mineral oil supply.

In order to flush the nozzle 11 more easily, in a preferred embodiment of the present invention, along the flow direction of the mineral oil, a mineral oil pump 42 is also arranged on the mineral oil flushing pipeline 40 . The mineral oil pump 42 can pressurize the mineral oil, and the clogged nozzles 11 can be washed away more easily with the pressurized mineral oil.

Preferably, in the above-mentioned catalyst injection device, a one-way valve 45 is further provided on the mineral oil flushing line 40 , and the one-way valve 45 is provided downstream of the mineral oil pump 42 along the flow direction of the mineral oil. A check valve 45 is added to the mineral oil flushing pipeline 40 to prevent materials in other pipelines communicating with the mineral oil flushing pipeline 40 (such as the catalyst in the catalyst feed pipeline 20 ) from back-sequencing into the mineral oil flushing pipeline 40 .

In order to more accurately control the pressure of the mineral oil pumped out by the mineral oil pump 42, in a preferred embodiment of the present utility model, a pressure gauge 43 is also arranged on the mineral oil flushing pipeline 40, and the pressure gauge 43 is along the flow direction of the mineral oil It is installed between the mineral oil pump 42 and the one-way valve 45 .

Preferably, a flow meter 44 is further arranged on the mineral oil flushing pipeline 40, and the flow meter 44 is arranged between the mineral oil pump 42 and the one-way valve 45 along the flow direction of the mineral oil. The flow meter 44 can monitor the state of the pumped mineral oil in real time, so as to adjust the pressure pumped out by the mineral oil pump 42 in real time. The above-mentioned pressure gauge 43 and flowmeter 44 can also be arranged between the mineral oil pump 42 and the one-way valve 45 at the same time, and are used to monitor the state of the mineral oil pumped out in real time. The positions of the pressure gauge 43 and the flowmeter 44 can be swap each other.

The above-mentioned catalyst injection device is preferably obtained by improving existing devices. When the nozzle 11 is blocked by the catalyst in the existing device, it is realized by flushing the liquid propylene in the liquid propylene flushing line 60 . Therefore, in a preferred embodiment of the present utility model, the above-mentioned catalyst injection device further includes: a liquid propylene flushing pipeline 60 , and the liquid propylene flushing pipeline 60 communicates with the nozzle 11 . Retaining the liquid propylene flushing pipeline 60 makes the flushing methods for the clogged nozzle 11 more diverse and flexible.

Preferably, the catalyst injection device further includes: a catalyst delivery main pipe 80 , the catalyst feed line 20 , the mineral oil flushing line 40 , and the liquid propylene flushing line 60 communicate with the nozzle 11 through the catalyst delivery main pipe 80 . By setting the catalyst conveying main pipe 80 in communication with the nozzle 11 and other pipelines in communication with the catalyst conveying main pipe 80, it is more convenient to flexibly set the catalyst feeding pipeline 20, the mineral oil flushing pipeline 40 and the liquid propylene flushing pipeline 60.

Preferably, a feed valve is provided on the catalyst feed line 20 to facilitate the supply and delivery of the catalyst according to actual needs.

Preferably, a flushing valve is provided on the liquid propylene flushing pipeline 60, so as to open or close the liquid propylene in the flushing nozzle 11 according to actual needs.

In a most preferred embodiment of the present utility model, as shown in Figure 2, on the basis of the original catalyst feed line 20 and liquid propylene flushing line 60, an additional mineral oil flushing line 40 is connected with the nozzle 11 to drain the mineral oil The oil is pumped out from the mineral oil storage tank 41, and the mineral oil pump 42 pressurizes the mineral oil, and the blocked nozzle 11 is washed away with the pressurized mineral oil, and the mineral oil entering the reactor 10 has no influence on the polymerization reaction and product quality. A pressure gauge 43 and a flow meter 44 are provided at the outlet of the mineral oil pump 42 to display the state of the mineral oil at the pump outlet. A one-way valve 45 is added to the mineral oil flushing pipeline 40 to prevent liquid propylene and catalysts from entering the mineral oil flushing pipeline 40 in reverse. The online cleaning method of the nozzle 11 is: (1) when the nozzle 11 is blocked, immediately start the mineral oil pump 42, and the outlet pressure is set to 3-8Mpa; (2) when the flow meter 44 suddenly shows a flow rate, turn off the mineral oil pump 42 (An appropriate amount of mineral oil has no effect on the reaction and product quality, but the mineral oil cannot be added too much, and adding too much may increase the ash content in the product. Therefore, when the flow meter 44 shows a flow, it means that the mineral oil has been added to the reactor In 10, the clogged nozzle 11 has been flushed open, and now there is no need to add mineral oil, so the mineral oil pump 42 is closed in time). (3) Check whether the feed of the catalyst feed line 20 is normal (mainly judged by the liquid propylene flushing flow rate. If the nozzle is blocked, the propylene flushing flow rate will be interrupted. After the nozzle is unblocked, the propylene flushing flow rate will resume). If it is not normal, it means that the nozzle 11 is still If there is blockage, continue to repeat the above steps until the nozzle 11 is completely flushed.

From the above description, it can be seen that the above-mentioned embodiments of the utility model have achieved the following technical effects: by adding a mineral oil flushing pipeline connected with the nozzle of the reactor, since the mineral oil enters the reactor, the polymerization reaction and the product There is no impact on the quality, so it can be realized that when the catalyst injected into the catalyst feed line blocks the nozzle or the nozzle feed is abnormal and affects production, the mineral oil from the mineral oil flushing line can be used to flush the nozzle online in time, and the nozzle after dredging can be normal In this way, the economic loss caused by the stoppage of the reaction caused by the blockage of the nozzle is avoided, and the operation stability of the reaction device is improved.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A catalyst injection device, characterized in that, said catalyst injection device comprises: A reactor (10) with a nozzle (11); Catalyst feed line (20), communicated with said nozzle (11); A mineral oil flushing pipeline (40), the mineral oil flushing pipeline (40) is in communication with the nozzle (11). 2. The catalyst injection device according to claim 1, wherein the catalyst injection device further comprises: A mineral oil storage tank (41), the mineral oil storage tank (41) communicates with the nozzle (11) through the mineral oil flushing line (40). 3. The catalyst injection device according to claim 2, characterized in that a mineral oil pump (42) is also provided on the mineral oil flushing line (40). 4. The catalyst injection device according to claim 3, characterized in that, the mineral oil flushing line (40) is also provided with a one-way valve (45), and the one-way valve (45) runs along the The flow direction of is set downstream of the mineral oil pump (42). 5. The catalyst injection device according to claim 4, characterized in that, the mineral oil flushing line (40) is also provided with a pressure gauge (43), and the pressure gauge (43) is arranged on the mineral oil pump ( 42) and the check valve (45). 6. The catalyst injection device according to claim 4, characterized in that, the mineral oil flushing line (40) is also provided with a flow meter (44), and the flow meter (44) is arranged on the mineral oil pump ( 42) and the check valve (45). 7. The catalyst injection device according to any one of claims 1 to 6, wherein the catalyst injection device further comprises: A liquid propylene flushing line (60), the liquid propylene flushing line (60) communicating with the nozzle (11). 8. The catalyst injection device according to claim 7, wherein the catalyst injection device further comprises: The catalyst delivery main pipe (80), the catalyst feeding pipeline (20), the mineral oil flushing pipeline (40), and the liquid propylene flushing pipeline (60) respectively pass through the catalyst delivery main pipe (80) and the nozzle (11) connected. 9. The catalyst injection device according to claim 1, characterized in that a feed valve is arranged on the catalyst feed line (20). 10. The catalyst injection device according to claim 7, characterized in that a flushing valve is arranged on the liquid propylene flushing line (60).