CN219282046U - Conveying pump for styrene extractive distillation - Google Patents

Abstract

The utility model relates to a conveying pump for styrene extractive distillation, which comprises a pump body and a pump head, wherein the pump body is connected with the pump head, one side of the pump head, which is far away from the pump body, is provided with a feed inlet, the feed inlet is connected with a first flange, the first flange is connected with a condensing assembly, the condensing assembly comprises a conveying pipe and a condensing pipe, the condensing pipe is arranged in the conveying pipe, two ends of the condensing pipe penetrate through the conveying pipe and are connected with a water tank, and the condensing pipe is arranged to cool C8 fraction after hydrogenation before conveying by the conveying pump, so that the loss of the conveying pump is reduced, and the energy consumption of a heat exchanger is reduced.

Description

Conveying pump for styrene extractive distillation

Technical Field

The utility model relates to the technical field of conveying pumps, in particular to a conveying pump for styrene extractive distillation.

Background

The raw materials of the styrene extractive distillation come from the hydrogenated C8 fraction from the hydrogenation device, the hydrogenated C8 fraction is conveyed to the middle part of the extractive distillation tower through the conveying pump, the feeding temperature of the hydrogenated C8 fraction can influence the selectivity of styrene extraction, the feeding temperature of the hydrogenated C8 fraction needs to be strictly controlled, heat exchange is generally carried out through a heat exchanger before feeding, but the temperature of the hydrogenated C8 fraction from the hydrogenation device is higher, the conveying pump is easy to damage after long-time conveying, and the hydrogenated C8 fraction is directly conveyed to the heat exchanger for carrying out, so that the heat exchanger has high energy consumption and low heat exchange effect, and the extraction effect of styrene is influenced.

Disclosure of Invention

The utility model aims to design a conveying pump for styrene extractive distillation, which can reduce the temperature of C8 fraction after hydrogenation before conveying by the conveying pump, reduce the loss of the conveying pump and reduce the energy consumption of a heat exchanger.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a styrene is extracted and is distilled and is used delivery pump, includes the pump body and pump head, the pump body with the pump head is connected, the discharge gate has been seted up to the upper end of pump head, the pump head keep away from the feed inlet has been seted up to one side of pump body, the feed inlet is connected with first flange, first flange coupling has condensation subassembly, condensation subassembly includes conveyer pipe and condenser pipe, the both ends of conveyer pipe are connected with second flange and third flange respectively, the second flange pass through first bolt with first flange coupling; the condenser pipe is installed the inside of conveyer pipe, the both ends of condenser pipe are all run through the conveyer pipe is connected with the water tank, the condenser pipe is located the part of the inside of conveyer pipe is the heliciform.

Further, gaskets are arranged between the first flange and the second flange and between the third flange and the fourth flange.

Further, a plurality of buckles are arranged at two ends of the conveying pipe, and the buckles are circumferentially arrayed on the conveying pipe by taking the conveying pipe as a circle center.

Further, one end of the conveying pipe, which is close to the third flange, is provided with a first filter screen, one end of the conveying pipe, which is close to the second flange, is provided with a second filter screen, the first filter screen and the second filter screen are respectively installed on the buckles, and the aperture of the first filter screen is larger than that of the second filter screen.

Further, the outer side of the conveying pipe is sleeved with a heat-insulating film; the second flange is provided with a first fixing ring, the third flange is provided with a second fixing ring, a gap is reserved between the first fixing ring and the conveying pipe, and the gap is matched with the heat preservation film.

Further, one side of the discharge hole is communicated with a water inlet pipe; the lower extreme intercommunication of the pump body has the outlet pipe, on the inlet tube with on the outlet pipe all install the stop valve.

Compared with the prior art, the utility model has the beneficial effects that:

when the utility model works, the conveying pipe is fixedly connected to the conveying pump by arranging the connection of the first flange and the second flange; through setting up the condenser pipe for after the hydrogenation C8 fraction carries out the cooling before carrying through the delivery pump, and then reduces the loss of delivery pump, reduces the energy consumption of heat exchanger.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of the present utility model;

fig. 2 is a cross-sectional view of the condensing assembly of the present utility model.

The names of the components marked in the figures are as follows:

1. a pump body; 2. a pump head; 3. a discharge port; 4. a feed inlet; 5. a first flange; 6. a second flange; 7. a third flange; 8. a delivery tube; 9. a condensing tube; 10. a first filter screen; 11. a second filter screen; 12. a thermal insulation film; 13. a first fixing ring; 14. a second fixing ring; 15. a water inlet pipe; 16. a water outlet pipe; 17. and a stop valve.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present utility model with reference to the accompanying drawings and preferred embodiments.

Examples: referring to fig. 1-2, a conveying pump for styrene extractive distillation comprises a pump body 1, a pump head 2, a discharge port 3, a feed port 4, a water inlet pipe 15, a water outlet, a water inlet pipe and a water outlet, wherein the pump body 1 is connected with the pump head 2; the lower extreme intercommunication of pump body 1 has outlet pipe 16, all install stop valve 17 on inlet tube 15 and the outlet pipe 16, the delivery pump is when using, stop valve 17 on inlet tube 15 and the outlet pipe 16 all keep closed state, when the delivery pump is not used for a long time, need wash the inside of pump head 2, open the stop valve 17 of inlet tube 15, water is carried in pump head 2 from inlet tube 15, wash the inside of pump head 2, open the stop valve 17 of outlet pipe 16 after the washing is accomplished, sewage in the pump head 2 flows out through outlet pipe 16, carry the sewage treatment jar and handle, avoid remaining hydrogenation back C8 fraction to stay for a long time can to the inside corruption of pump head 2. The feeding port 4 is connected with a first flange 5, the first flange 5 is connected with a condensing assembly, the condensing assembly comprises a conveying pipe 8 and a condensing pipe 9, two ends of the conveying pipe 8 are respectively connected with a second flange 6 and a third flange 7, the second flange 6 is connected with the first flange 5 through a first bolt, the third flange 7 is connected with a fourth flange through a second bolt, the fourth flange is connected with a raw material conveying pipe, gaskets are arranged between the first flange 5 and the second flange 6 and between the third flange 7 and the fourth flange, after the first bolt and the second bolt fasten the first flange 5, the second flange 6, the third flange 7 and the fourth flange through nuts, the specific pressure on the surfaces of the gaskets is deformed after reaching a certain value, and the uneven parts of sealing surfaces are filled, so that the flanges are tightly sealed, and the C8 fraction after hydrogenation is conveyed is ensured not to leak out from the flanges; the condenser pipe 9 is installed in the inside of conveyer pipe 8, conveyer pipe 8 and water tank are all run through at the both ends of condenser pipe 9, the water tank is the refrigeration water tank, the comdenstion water of condenser pipe 9 comes out from the water tank, carry the inside of conveyer pipe 8, carry out abundant heat transfer with the hydrogenation back C8 fraction, the comdenstion water after the heat transfer flows back to the water tank, form the comdenstion water return circuit, the condenser pipe 9 is the heliciform in the inside of conveyer pipe 8, the heat exchange area has been increased, the hydrogenation back C8 fraction can fully carry out the heat exchange with the comdenstion water in the condenser pipe 9, reduce the temperature of hydrogenation back C8 fraction, reduce high temperature to the delivery pump influence, alleviate the loss to the delivery pump, simultaneously reduce the energy consumption of heat exchanger. The heat preservation film 12 is sleeved on the outer side of the conveying pipe 8, and the heat preservation film 12 can prevent the condensation pipe 9 from being affected by weather in hot weather, so that the condensation effect is poor; the second flange 6 is provided with the first fixing ring 13, the third flange 7 is provided with the second fixing ring 14, gaps are reserved between the first fixing ring 13 and the conveying pipe 8 and between the second fixing ring 14 and the conveying pipe 8, the gaps are matched with the heat-insulating film 12, the heat-insulating film 12 can be clamped in and fixed in the gaps, after the heat-insulating film 12 is used for a long time, the heat-insulating effect is deteriorated, when the heat-insulating film 12 is replaced, the old heat-insulating film 12 can be directly pulled out, and the new heat-insulating film 12 is clamped in the gaps between the first fixing ring 13 and the conveying pipe 8 and the gaps between the second fixing ring 14 and the conveying pipe 8 for fixing.

Four buckles are arranged at two ends of the conveying pipe 8, the buckles are circumferentially arrayed on the conveying pipe 8 by taking the conveying pipe 8 as a circle center, a first filter screen 10 is arranged at one end, close to the third flange 7, of the conveying pipe 8, a second filter screen 11 is arranged at one end, close to the second flange 6, of the conveying pipe 8, the first filter screen 10 and the second filter screen 11 are respectively arranged on the buckles, the first filter screen 10 and the second filter screen 11 are convenient to detach and clean, the aperture of the first filter screen 10 is larger than that of the second filter screen 11, C8 fractions after hydrogenation are subjected to primary filtration through the first filter screen 10, impurities are subjected to primary filtration, C8 fractions after primary filtration are subjected to secondary filtration after being cooled through the condenser pipe 9, the impurities are subjected to secondary filtration, excessive impurities of the C8 fractions after hydrogenation conveyed to the extraction distillation tower are avoided, and the quality of styrene finished products is poor.

The working principle of the embodiment is as follows: one end of a conveying pipe 8 is connected with a conveying pump through a first flange 5 and a second flange 6, the other end of the conveying pipe 8 is connected with a raw material conveying pipe through a third flange 7 and a fourth flange, condensed water is introduced into a condensing pipe 9 in a condensing assembly, a heat preservation film 12 is sleeved outside the conveying pipe 8, a first fixing ring 13 and a second fixing ring 14 clamp the heat preservation film 12, when C8 fraction after hydrogenation is conveyed, the C8 fraction after hydrogenation exchanges heat with the condensing pipe 9 through the conveying pipe 8, and the cooled C8 fraction after hydrogenation is conveyed to an extraction distillation tower through the conveying pump; when the delivery pump is not used for a long time, the stop valve of the water inlet pipe 15 is opened, water is delivered into the pump head 2 from the water inlet pipe 15, the interior of the pump head 2 is cleaned, after the cleaning is finished, the stop valve of the water outlet pipe 16 is opened, and sewage in the pump head 2 flows out through the water outlet pipe 16 and is delivered to the sewage treatment tank for treatment.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper," "lower," "left," "right," "front," "back," and the like are used herein for illustrative purposes only.

The present utility model is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (6)

1. The utility model provides a delivery pump for styrene extractive distillation, includes pump body (1) and pump head (2), pump body (1) with pump head (2) are connected, discharge gate (3) have been seted up to the upper end of pump head (2), keep away from of pump head (2) feed inlet (4) have been seted up in one side of pump body (1), its characterized in that: the feeding port (4) is connected with a first flange (5), the first flange (5) is connected with a condensing assembly, the condensing assembly comprises a conveying pipe (8) and a condensing pipe (9), two ends of the conveying pipe (8) are respectively connected with a second flange (6) and a third flange (7), and the second flange (6) is connected with the first flange (5) through a first bolt; the condenser pipe (9) is installed inside conveyer pipe (8), the both ends of condenser pipe (9) are all run through conveyer pipe (8) are connected with the water tank, the part that condenser pipe (9) are located inside conveyer pipe (8) is the heliciform.

2. The transfer pump for extractive distillation of styrene according to claim 1, wherein: a gasket is arranged between the first flange (5) and the second flange (6).

3. The transfer pump for extractive distillation of styrene according to claim 1, wherein: the two ends of the conveying pipe (8) are provided with a plurality of buckles, and the buckles are circumferentially arrayed on the conveying pipe (8) by taking the conveying pipe (8) as a circle center.

4. A transfer pump for extractive distillation of styrene according to claim 3, wherein: the one end that conveyer pipe (8) is close to third flange (7) is equipped with first filter screen (10), the one end that conveyer pipe (8) is close to second flange (6) is equipped with second filter screen (11), first filter screen (10) with second filter screen (11) are installed respectively on the buckle, the aperture ratio of first filter screen (10) the aperture of second filter screen (11) is big.

5. The transfer pump for extractive distillation of styrene according to claim 1, wherein: the outer side of the conveying pipe (8) is sleeved with a heat-insulating film (12); be equipped with first solid fixed ring (13) on second flange (6), be equipped with second solid fixed ring (14) on third flange (7), first solid fixed ring (13) with leave the space between second solid fixed ring (14) all with conveyer pipe (8), the space with heat preservation membrane (12) cooperation.

6. The transfer pump for extractive distillation of styrene according to claim 1, wherein: one side of the discharge hole (3) is communicated with a water inlet pipe (15); the lower extreme of the pump body (1) is communicated with a water outlet pipe (16), and stop valves (17) are arranged on the water inlet pipe (15) and the water outlet pipe (16).

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