CN217857860U - Tank wall caking washing unit of PTA mother liquor extraction tank - Google Patents

Abstract

The utility model belongs to the technical field of the PTA processing technique and specifically relates to a PTA mother liquor draws jar wall knot material washing unit of jar, draw out the jar including the mother liquor, be provided with the mother liquor output tube in the bottom that the jar was drawn out to the mother liquor, be provided with the delivery pump on the mother liquor output tube, be provided with the back flow on the mother liquor output tube in delivery direction the place ahead of delivery pump, the back flow extends to the mother liquor and takes out jar inside, is provided with the backward flow valve on the back flow, and the lower extreme that draws out the jar at the mother liquor is provided with a plurality of liquid outlet nozzle, the back flow is connected with liquid outlet nozzle, the mother liquor that liquid outlet nozzle exported is taken out jar interior along clockwise or counter-clockwise motion at the mother liquor. The utility model provides a PTA mother liquor takes out jar wall knot material washing unit can utilize the mother liquor of backward flow to take out jar interior mother liquor to the mother liquor and strike, makes it take place to flow to avoid its impurity knot material that appears to make the mother liquor output more smoothly stable on the jar wall of jar is taken out to the mother liquor, with the quality of guaranteeing PTA production.

Description

Tank wall caking washing unit of PTA mother liquor extraction tank

Technical Field

The utility model belongs to the technical field of the PTA processing technique and specifically relates to a PTA mother liquor draws out jar wall knot material washing unit of jar.

Background

In the prior art, in order to ensure the qualified and stable quality of finished products of the PTA device, circulating mother liquor needs to be continuously conveyed to a mother liquor extraction tank according to a certain proportion, so that the impurity content in the mother liquor is not overproof, and the mother liquor in the mother liquor extraction tank is conveyed from the bottom to a downstream catalyst recovery unit for treatment. However, in the long-period operation, the mother liquor in the tank is evaporated, impurities are separated layer by layer to cause serious material caking on the wall of the tank, and finally the normal pumping amount of an output pump at the bottom is difficult to ensure, so that the production quality of the PTA device is influenced.

At present, when an output pipeline falls into after the material is deposited on the wall of a tank to block an output pump, in order to ensure the normal pumping amount of mother liquor, auxiliary materials such as condensate or steam need to be frequently used for carrying out blocking and dredging operation on an inlet pipeline, but the effect is not ideal and the problem of material wall deposition cannot be fundamentally solved. The blocking operation has certain danger, and can cause the gas phase pipeline and the overflow pipeline of the mother liquor extraction tank to jump into blocky materials, thereby influencing other equipment and causing the fluctuation of a mother liquor production system.

Therefore, a device capable of effectively preventing the mother liquor from caking on the wall of the extraction tank is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned technique not enough and provide a PTA mother liquor and take out jar wall knot material washing unit, can make and take out the interior mother liquor of jar and flow and avoid it to knot the material at jar wall.

The utility model discloses a PTA mother liquor draws out jar wall knot material washing unit, draw out the jar including the mother liquor, be provided with the mother liquor output tube in the bottom that the jar was drawn out to the mother liquor, be provided with the delivery pump on the mother liquor output tube, be provided with the back flow on the mother liquor output tube in delivery direction the place ahead of delivery pump, the back flow extends to the mother liquor and takes out jar inside, is provided with the backward flow valve on the back flow, and the lower extreme that draws out the jar at the mother liquor is provided with a plurality of liquid outlet nozzle, the back flow is connected with liquid outlet nozzle, the mother liquor that liquid outlet nozzle exported takes out jar interior clockwise or counter-clockwise motion in the mother liquor.

Wherein mother liquor at mother liquor output tube department is provided with broken whirlpool ware in taking out the jar, broken whirlpool ware is used for preventing the mother liquor to produce the vortex in the bottom that the mother liquor was taken out the jar to avoid the mother liquor to produce the swirl and smuggle gas entering delivery pump secretly.

In the scheme, a mother liquor input pipe connected with the exchanger, an overflow pipe for overflowing, an emptying pipe for emptying, a liquid discharge pipe for discharging condensed liquid of the jacket and a gas phase pipe for keeping pressure balance are further arranged on the mother liquor extraction tank; certainly, a liquid level meter is also arranged on the mother liquor extracting tank.

The method comprises the following specific work: mother liquor in the mother liquor pumping tank is conveyed outwards through the conveying pump and the mother liquor output pipe, in the conveying process, partial mother liquor flows back to the inside of the mother liquor pumping tank through the return pipe and is sprayed out through the liquor outlet spray head, and the liquor outlet direction consistency of the liquor outlet spray head can promote the mother liquor in the mother liquor pumping tank to flow along one direction, namely clockwise or anticlockwise rotation is carried out, and the mother liquor can not produce caking on the tank wall of the mother liquor pumping tank in the continuous rotating process. Even if at long period operation in-process, the mother liquor evaporation and when causing impurity to appear, under the mother liquor effect that flows, impurity can merge into the mother liquor, can not adhere to on the jar wall of mother liquor extraction jar, and impurity also can not accumulate and be bulky, can not cause the condition of jam to the output of mother liquor, and then guarantee the stability of mother liquor output and the quality of PTA production.

In addition, the backflow flow valve can be adjusted according to actual requirements, so that the flow rate of mother liquor sprayed by the liquid outlet nozzle is changed, and the flow rate of the mother liquor in the mother liquor pumping tank is changed adaptively. If the mother liquor amount in the mother liquor extraction tank is large, the backflow flow valve of the backflow pipe is adjusted to be large, and therefore the flow speed of the mother liquor in the mother liquor extraction tank can meet the requirement.

The included angle between the projection of the liquid outlet direction of the liquid outlet nozzle in the horizontal plane and the radius of the mother liquid extracting tank where the liquid outlet nozzle is located is 30-60 degrees. The design of angle can make the mother liquor take out the interior mother liquor of jar and flow more smoothly, and it can also have certain impact force to the jar wall that the mother liquor was taken out the jar, and the jar wall knot material of the impurity that further can avoid appearing at the mother liquor extraction jar.

The liquid outlet direction of the liquid outlet nozzle is inclined upwards, and the included angle between the liquid outlet direction and the horizontal direction is 20-45 degrees. The liquid outlet spray head inclines upwards, so that the mother liquid in the whole mother liquid extraction tank can have rotating power, and the mother liquid moves more comprehensively.

The bottom of the mother liquor extraction tank is fixed with crossed pipelines through a support, the pipelines are communicated with a return pipe, the number of the liquid outlet spray heads is four, and the four liquid outlet spray heads are respectively arranged at four end parts of the pipelines.

The liquid outlet nozzle is structurally characterized in that: the device comprises a liquid outlet pipe and a circulating cover, wherein the liquid outlet pipe comprises a mother liquid input end and a mother liquid output end, the mother liquid input end is connected with a backflow pipe, the diameter of the liquid outlet pipe is gradually reduced from the mother liquid input end to the mother liquid output end, and the liquid outlet pipe is transited through a cambered surface; the circulation cover cup joints on the drain pipe, just inside the mother liquor output end of drain pipe was located the circulation cover, sealing connection between the mother liquor input of circulation cover and drain pipe, the circulation cover tip that corresponds the department at the mother liquor output set up out the liquid hole, and the diameter in play liquid hole is greater than the mother liquor output end diameter of drain pipe, is provided with back the liquid hole on two relative lateral walls of circulation cover.

Go out the rational design of liquid shower nozzle, adopt the drain pipe to dwindle gradually to the diameter of mother liquor output by the mother liquor input, and adopt the cambered surface transition, can effectively realize the velocity of flow increase of the mother liquor of liquid shower nozzle output, and then make the mother liquor take out the faster flow of the mother liquor velocity in jar, the design of cover is circulated simultaneously, when the drain pipe outwards carries the mother liquor, can supply its mother liquor on every side, avoid causing the resistance to drain pipe spun mother liquor, thereby can effectively promote the mother liquor and take out the flow rate of the mother liquor in jar.

The utility model provides a PTA mother liquor takes out jar wall knot material washing unit of jar can utilize the mother liquor of backward flow to take out jar interior mother liquor to the mother liquor and strike, makes it take place to flow to avoid its impurity knot material that appears to make mother liquor output more smoothly stable on the jar wall of jar is taken out to the mother liquor, with the assurance PTA production quality.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the liquid outlet nozzle of the present invention;

fig. 3 is a schematic structural view of the liquid outlet nozzle of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description is given to the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.

Example 1:

as shown in fig. 1, the utility model discloses a PTA mother liquor takes out jar wall knot material washing unit of jar, take out jar 1 including the mother liquor, be provided with mother liquor output tube 2 in the bottom that jar 1 was taken out to the mother liquor, be provided with delivery pump 3 on mother liquor output tube 2, be provided with back flow 4 on mother liquor output tube 2 in delivery pump 3's output direction the place ahead, inside back flow 4 extended to the mother liquor and taken out jar 1, be provided with backward flow valve 5 on back flow 4, be provided with 4 liquid shower nozzles 6 at the lower extreme that jar 1 was taken out to the mother liquor, back flow 4 is connected with liquid shower nozzle 6, the mother liquor that liquid shower nozzle 6 exported takes out jar 1 interior clockwise motion along the mother liquor. The direction of the liquid outlet spray head 6 is arranged as shown in figure 2.

Wherein be provided with vortex breaker 14 in the mother liquor extraction tank 1 of mother liquor output tube 2 department, vortex breaker 14 is used for preventing the mother liquor from producing the vortex at the bottom of mother liquor extraction tank 1 to avoid the mother liquor to produce the swirl and smuggle gas entering transfer pump 3 secretly. The concrete structure of the vortex device 14 can be a plate body arranged at the bottom of the mother liquor extraction tank 1, the plate body is vertically arranged, and the plate body is positioned at the mother liquor output pipe 2. The specific position to the plate body can have certain deviation, and of course it can be in mother liquor output tank 1 department of mother liquor output tube 2 corresponding department, and the plate body is divided into two with the inlet of mother liquor output tube 2, and its effect is better.

The mother liquor extraction tank 1 is also provided with a mother liquor input pipe 8 connected with the exchanger, an overflow pipe 9 for overflow, an emptying pipe 11 for emptying, a liquid discharge pipe 13 for discharging condensed liquid of the jacket and a gas phase pipe 12 for keeping pressure balance; certainly, the mother liquor extracting tank 1 is also provided with a liquid level meter, the mother liquor extracting tank 1 is also provided with a steam pipe 10, a jacket is arranged outside the mother liquor extracting tank 1, and the steam pipe 10 is used for introducing steam into the jacket to keep the temperature of the jacket stable.

The included angle between the projection of the liquid outlet direction of the liquid outlet nozzle 6 in the horizontal plane and the radius of the mother liquid extraction tank 1 where the liquid outlet nozzle 6 is positioned is 45 degrees. The design of angle can make the mother liquor in the mother liquor extraction jar 1 flow more smoothly, and it can also have certain impact force to the jar wall of mother liquor extraction jar 1, further can avoid the impurity that separates out to consolidate at the jar wall of mother liquor extraction jar 1.

The liquid outlet direction of the liquid outlet spray head 6 is inclined upwards, and the included angle between the liquid outlet direction and the horizontal direction is 30 degrees. The liquid outlet spray head 6 inclines upwards, so that the mother liquid in the whole mother liquid pumping tank 1 can have rotating power, and the mother liquid moves more comprehensively.

Crossed pipelines are fixed at the bottom of the mother liquor extracting tank 1 through a support 7, the pipelines are communicated with the return pipe 4, the number of the liquid outlet spray heads 6 is four, and the four liquid outlet spray heads 6 are respectively arranged at four end parts of the pipelines. Of course, in other embodiments, the bottom of the mother liquor extracting tank 1 may also be provided with an annular pipeline, the return pipe 4 is connected with the annular pipeline, and the liquid outlet nozzle 6 is arranged on the annular pipeline.

As shown in fig. 3, the liquid outlet nozzle 6 has the following structure: the device comprises a liquid outlet pipe 61 and a circulating cover 64, wherein the liquid outlet pipe 61 comprises a mother liquid input end 62 and a mother liquid output end 63, the mother liquid input end 62 is connected with a return pipe 4, the diameter of the liquid outlet pipe 61 is gradually reduced from the mother liquid input end 62 to the mother liquid output end 63, and the liquid outlet pipe is transited through a cambered surface; circulation cover 64 cup joints on drain pipe 61, just the mother liquor output 63 of drain pipe 61 is located inside circulation cover 64, sealing connection between circulation cover 64 and the mother liquor input 62 of drain pipe 61, and circulation cover 64 tip that corresponds the department at mother liquor output 63 sets up drain hole 65, and the diameter of drain hole 65 is greater than the diameter of the mother liquor output 63 of drain pipe 61, is provided with back liquid hole 66 on two relative lateral walls of circulation cover 64.

Go out liquid shower nozzle 6's rational design, adopt drain pipe 61 to dwindle gradually to the diameter of mother liquor output 63 by mother liquor input 62, and adopt the cambered surface transition, can effectively realize the velocity of flow increase of the mother liquor of going out liquid shower nozzle 6 output, and then make the faster flow of mother liquor velocity in the mother liquor extraction jar 1, the design of circulation cover 64 simultaneously, when outside carrying the mother liquor in drain pipe 61, can supply its mother liquor on every side, avoid causing the resistance to drain pipe 61 spun mother liquor, thereby can effectively promote the flow rate of the mother liquor in the mother liquor extraction jar 1.

The method specifically works as follows: the mother liquor in the mother liquor pumping tank 1 is conveyed outwards through the conveying pump 3 and the mother liquor output pipe 2, in the conveying process, partial mother liquor flows back to the inside of the mother liquor pumping tank 1 through the return pipe 4 and is sprayed out through the liquid outlet spray head 6, and the liquid outlet direction consistency of the liquid outlet spray head 6 is designed, so that the mother liquor in the mother liquor pumping tank 1 can flow along one direction, namely clockwise or anticlockwise rotation is carried out, and the mother liquor can not produce caking on the tank wall of the mother liquor pumping tank 1 in the continuous rotation process. Even if at long period operation in-process, when the mother liquor evaporation caused impurity to separate out, under mobile mother liquor effect, impurity can be fused into the mother liquor, can not adhere to on the jar wall of mother liquor extraction jar 1, and impurity also can not accumulate and be the bulky, can not cause the condition of jam to the output of mother liquor, and then guarantee the stability of mother liquor output and the quality of PTA production.

In addition, the reflux flow valve 5 can be adjusted according to actual requirements, so that the flow rate of the mother liquor sprayed by the liquid outlet nozzle 6 is changed, and the flow rate of the mother liquor pumped out of the tank 1 is changed adaptively. If the mother liquor in the mother liquor extracting tank 1 is large in quantity, the reflux flow valve 5 of the reflux pipe 4 is adjusted to be large in flow, and therefore the flow rate of the mother liquor in the mother liquor extracting tank 1 is ensured to meet the requirement.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be a mechanical connection; they may be directly connected or indirectly connected through intervening media, or may be in the interactive relationship of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention.

Claims (5)

1. The utility model provides a PTA mother liquor draws out jar wall knot material washing unit, includes that the mother liquor draws out jar, is provided with the mother liquor output tube in the bottom that the mother liquor was drawn out jar, is provided with delivery pump, characterized by on the mother liquor output tube: be provided with the back flow on the mother liquor output tube in delivery pump's output direction the place ahead, the back flow extends to the mother liquor and takes out jar inside, is provided with the backward flow valve on the back flow, is provided with a plurality of liquid shower nozzles at the lower extreme that the jar was taken out to the mother liquor, the back flow is connected with liquid shower nozzle, the mother liquor of going out liquid shower nozzle output takes out jar interior along clockwise or anticlockwise motion at the mother liquor.

2. The apparatus as claimed in claim 1, wherein the apparatus comprises: the included angle between the projection of the liquid outlet direction of the liquid outlet nozzle in the horizontal plane and the radius of the mother liquid extracting tank where the liquid outlet nozzle is located is 30-60 degrees.

3. The apparatus as claimed in claim 2, wherein the apparatus comprises: the liquid outlet direction of the liquid outlet nozzle is inclined upwards, and the included angle between the liquid outlet direction and the horizontal direction is 20-45 degrees.

4. The apparatus as claimed in claim 1, 2 or 3, wherein the apparatus comprises: the bottom of the mother liquor extraction tank is fixed with a cross pipeline through a support, the pipeline is communicated with a return pipe, the number of the liquid outlet spray heads is four, and the four liquid outlet spray heads are respectively arranged at the four end parts of the pipeline.

5. The apparatus as claimed in claim 1, 2 or 3, wherein the apparatus comprises: the liquid outlet nozzle is structurally characterized in that: the device comprises a liquid outlet pipe and a circulating cover, wherein the liquid outlet pipe comprises a mother liquid input end and a mother liquid output end, the mother liquid input end is connected with a backflow pipe, the diameter of the liquid outlet pipe is gradually reduced from the mother liquid input end to the mother liquid output end, and the liquid outlet pipe is transited through a cambered surface; the circulation cover cup joints on the drain pipe, just inside the mother liquor output end of drain pipe was located the circulation cover, sealing connection between the mother liquor input of circulation cover and drain pipe, the circulation cover tip that corresponds the department at the mother liquor output set up out the liquid hole, and the diameter in play liquid hole is greater than the mother liquor output end diameter of drain pipe, is provided with back the liquid hole on two relative lateral walls of circulation cover.

Images