Cooling and deslagging device for ethylene glycol injection pump

Abstract

The utility model discloses an ethylene glycol injection pump cooling and deslagging device which comprises a first storage container, a first filtering centrifugal pump assembly, a heat exchanger, a second storage container and a second filtering centrifugal pump assembly, the first storage container is used for storing ethylene glycol, and the first filtering centrifugal pump assembly is used for filtering the ethylene glycol in the first storage container. The first storage container is communicated with the first filtering centrifugal pump assembly, the heat exchanger is used for condensing ethylene glycol and communicated with the first filtering centrifugal pump assembly, the first filtering centrifugal pump assembly is used for pumping ethylene glycol in the first storage container into the heat exchanger, the second storage container is used for storing ethylene glycol, and the heat exchanger is communicated with the second storage container. The second filtering centrifugal pump assembly is used for filtering ethylene glycol in the second storage container, and a third filter is arranged between the second filtering centrifugal pump assembly and the first-stage injection pump. The device provided by the utility model solves the technical problems that the pipeline is easy to scale and the pipeline and the nozzle are blocked.

Description

TECHNICAL FIELD

[0001] The utility model relates to the polyester production technical field especially relates to a glycol injection pump cooling and deslagging device. BACKGROUND

[0002] At present, the process adopted by many polyester production enterprises involves a vacuum system, high vacuum is needed to drive the reaction to proceed in the positive direction in the polycondensation stage of polyester, and glycol and some low molecular substances are produced in the polycondensation reaction process.

[0003] The glycol enters the first-stage injection pump, the second-stage injection pump and the third-stage injection pump for spraying, the first-stage injection pump needs to spray after the glycol is cooled, the second-stage injection pump and the third-stage injection pump do not need to cool the glycol, the glycol enters the liquid seal tank through the downcomer of the first-stage injection pump, and the dissolved substances in the glycol are gradually condensed and separated out in the cooling process of the glycol in the liquid seal tank by the heat exchanger, causing the switching period of the heat exchanger to be short, the pipe wall of the spraying pipeline to be scaled, the nozzle to be blocked, and the downcomer pipeline of the first-stage injector to be blocked. After being blocked, only high-temperature glycol vapor can be used to flush, the dirt on the pipe wall is dissolved and loosened by the high temperature and taken away into the liquid seal tank, since the pipeline that needs to be flushed by heat is long, the flushing needs to be performed for a long time for multiple times, each time causes the vacuum to fluctuate, the product parameters to fluctuate, and if the vacuum system is blocked after being flushed by heat, the final result is that the machine needs to be stopped. Therefore, a new technical scheme is needed to solve at least one of the above technical problems. SUMMARY

[0004] In view of the above-mentioned deficiencies, the utility model aims at providing a glycol injection pump cooling and deslagging device, which is provided with two storage containers, the liquid seal of the glycol is completed by the first storage container, then the glycol is pumped into the heat exchanger for cooling, the dissolved substances in the glycol are condensed and separated out, then the glycol enters the second storage container for precipitation, and the glycol is filtered and deslagged in multiple stages, thereby solving the technical problems of easy scaling of the pipeline, blocking of the pipeline and the nozzle.

[0005] In order to achieve the above technical purposes and meet the above technical requirements, the utility model adopts the following technical scheme:

[0006] A glycol injection pump cooling and deslagging device, characterized in that it comprises:

[0007] a first storage container for storing glycol,

[0008] at least one first filter centrifugal pump assembly for filtering the glycol in the first storage container, the first storage container being in communication with the first filter centrifugal pump assembly;

[0009] at least one heat exchanger for condensing the ethylene glycol, the heat exchanger being in communication with the first filtration centrifugal pump assembly for pumping the ethylene glycol in the first storage container into the heat exchanger;

[0010] a second storage container for storing the ethylene glycol, the heat exchanger being in communication with the second storage container;

[0011] at least one second filtration centrifugal pump assembly for filtering and pumping the ethylene glycol in the second storage container into the first stage jet pump, the second filtration centrifugal pump assembly being provided with a third filter between the second filtration centrifugal pump assembly and the first stage jet pump.

[0012] As a preferred technical solution, the number of heat exchangers is two, which are a first heat exchanger and a second heat exchanger, and the first heat exchanger and the second heat exchanger are arranged in parallel.

[0013] As a preferred technical solution, the second heat exchanger outlet is provided with a first stage condensation branch, and the first stage condensation branch is in communication with the first stage jet pump.

[0014] As a preferred technical solution, the first filtration centrifugal pump assembly comprises a first filter in communication with the first storage container and a first centrifugal pump in communication with the first heat exchanger and the second heat exchanger, which are sequentially communicated.

[0015] As a preferred technical solution, the number of first filtration centrifugal pump assemblies is two, and the two first filtration centrifugal pump assemblies are arranged in parallel.

[0016] As a preferred technical solution, the number of second filtration centrifugal pump assemblies is two, and the two second filtration centrifugal pump assemblies are arranged in parallel, and the second filtration centrifugal pump assembly comprises a second filter in communication with the second storage container and a second centrifugal pump in communication with the third filter, which are sequentially communicated.

[0017] As a preferred technical solution, the first storage container is communicated with a first residue filter, and the second storage container is communicated with a second residue filter.

[0018] As a preferred technical solution, the heat exchanger is a plate heat exchanger.

[0019] As a preferred technical solution, the first filter and the second filter are basket filters, and the third filter is a candle filter.

[0020] As a preferred technical solution, a second stage condensation branch is arranged between the first centrifugal pump outlet and the first heat exchanger inlet.

[0021] Compared with the prior art, the utility model discloses the beneficial effects are:

[0022] 1)、It is provided with two storage containers, and the liquid sealing of ethylene glycol is completed by the first storage container, then is pumped to the heat exchanger and is cooled, and the dissolved material in ethylene glycol is condensed and is precipitated, then enters the second storage container and is precipitated, and the ethylene glycol is filtered and is removed residue in multiple stages, solve the technical problem that pipeline is easy to scale, pipeline and nozzle are blocked;

[0023] 2)、2 two heat exchangers improve heat exchange efficiency, and wherein 1 heat exchanger is damaged, also can not influence system operation;

[0024] 3)、When the second storage container precipitates more impurities and needs to be cleaned, the ethylene glycol in the first storage container can be sprayed into the first stage jet pump, and after cleaning is completed, the second storage container is reconnected, and system operation is not affected;

[0025] 4)、2 two first filter centrifugal pump assemblies are arranged in parallel, improve filtering effect and pumping efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structure diagram of the device provided for an embodiment of the utility model is provided;

[0027] Figure 2 The partial structure diagram of the device provided for an embodiment of the utility model is provided;

[0028] Figure 3 Another partial structure diagram of the device provided for an embodiment of the utility model is provided;

[0029] In Figures 1-3 , 1, first storage container;2, first heat exchanger;3, second heat exchanger;4, second storage container;5, first filter;6, first centrifugal pump;7, second filter;8, second centrifugal pump;9, third filter;10, first residue filter;11, second residue filter;12, first condensation branch;13, second condensation branch;14, first pneumatic regulating valve;15, second pneumatic regulating valve;16, first stage jet pump;17, first liquid down pipe;18, second liquid down pipe;19, third liquid down pipe;20, evaporation branch;21, ethylene glycol evaporator;22, liquid level meter;23, thermometer;24, second stage jet pump;25, third stage jet pump;26, first water storage tank;27, second water storage tank. DETAILED DESCRIPTION

[0030] The utility model is further described below in connection with the drawings.

[0031] The same or similar reference signs in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that, if the terms "top", "bottom", "left", "right", "front", "back", "inner", "outer" and the like appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing the positional relationship in the drawings are only used for exemplary description, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0032] Please refer to Figures 1-3 The present application provides a kind of ethylene glycol injection pump cooling slag removal device, including first storage container 1, at least 1 first filter centrifugal pump assembly, at least 1 heat exchanger, second storage container 4, at least 1 second filter centrifugal pump assembly, first storage container 1 is used to store ethylene glycol, first filter centrifugal pump assembly is used to filter the ethylene glycol in the first storage container 1, the first storage container 1 with the first filter centrifugal pump assembly communication, heat exchanger is used to condense ethylene glycol, the heat exchanger with the first filter centrifugal pump assembly communication, the first filter centrifugal pump assembly is used to pump the ethylene glycol in the first storage container 1 into the heat exchanger, second storage container 4 is used to store ethylene glycol, the heat exchanger with the second storage container 4 communication, second filter centrifugal pump assembly is used to filter the ethylene glycol in the second storage container 4, and pump the ethylene glycol in the second storage container 4 into first stage injection pump 16, the second filter centrifugal pump assembly with first stage injection pump 16 between being provided with third filter 9.

[0033] First stage injection pump 16 has first lower liquid pipe 17, second stage injection pump 24 has second lower liquid pipe 18, third stage injection pump 25 has third lower liquid pipe 19, first storage container 1 is communicated first lower liquid pipe 17, second lower liquid pipe 18 and third lower liquid pipe 19 respectively, ethylene glycol enters first storage container 1 from lower liquid pipe and is deposited with liquid seal, then is filtered by first filter centrifugal pump assembly, and is pumped to first heat exchanger 2 and is condensed and cooled, dissolved material in ethylene glycol is condensed and separated out, then enters second storage container 4 and is deposited for the second time, then is filtered by second filter centrifugal pump assembly, and is pumped to first stage injection pump 16 and is sprayed, and ethylene glycol is filtered and slag removed in multiple stages, solve the technical problem that pipeline is easy to scale, pipeline and nozzle are blocked, prolong the service life of system, reduce maintenance cost.

[0034] As Figures 1-3As shown, the number of heat exchangers is 2, which are the first heat exchanger 2 and the second heat exchanger 3, the first heat exchanger 2 and the second heat exchanger 3 are arranged in parallel, the first filtering centrifugal pump assembly sends the ethylene glycol into the first heat exchanger 2 and the second heat exchanger 3 respectively for heat exchange and condensation, then the outlet of the first heat exchanger 2 and the outlet of the second heat exchanger 3 are connected in parallel and enter the second storage container 4, the two heat exchangers improve the heat exchange efficiency, and even if one of the heat exchangers is damaged, it will not affect the system operation.

[0035] The condensed water in the first water storage tank 26 enters the first heat exchanger 2 and the second heat exchanger 3, the condensed water after heat exchange enters the second water storage tank 27 for storage, then after cooling it can also be used as condensed water and enter the first water storage tank 26, forming a circulation, the flow direction and flow rate of the condensed water are controlled by the first pneumatic regulating valve 14.

[0036] Further, as shown in Figures 1-3 The heat exchanger has two outlets, which are the condensed ethylene glycol outlet and the condensed water outlet, and two inlets, which are the to-be-condensed ethylene glycol inlet and the condensed water inlet, the condensed ethylene glycol outlet, the condensed water outlet, the to-be-condensed ethylene glycol inlet and the condensed water inlet are all controlled by valves to open and close, the condensed ethylene glycol outlet of the second heat exchanger 3 is provided with a first condensation branch 12, the first condensation branch 12 communicates with the first-stage jet pump 16, that is, the outlet of the first heat exchanger 2 and the outlet of the second heat exchanger 3 are connected in parallel, which can also send ethylene glycol into the first condensation branch 12, the third filter 9 has two, the two third filters 9 are connected in series, when the second storage container 4 precipitates more impurities and needs to be cleaned, the ethylene glycol in the first storage container 1 can be filtered through the two third filters 9 first, then sprayed into the first-stage jet pump 16, after the cleaning is completed, the second storage container 4 is reconnected, which does not affect the system operation, the ethylene glycol in the second storage container 4 flows out from the second centrifugal pump 8 and is filtered through the third filter 9, and before the ethylene glycol flows into the second storage container 4, the flow rate and flow direction are controlled by the second pneumatic regulating valve 15.

[0037] As shown in Figures 1-3 The first filtering centrifugal pump assembly includes a first filter 5 and a first centrifugal pump 6 which are sequentially connected in communication, the first filter 5 communicates with the first storage container 1, and the first centrifugal pump 6 communicates with the first heat exchanger 2 and the second heat exchanger 3, specifically, the number of the first filtering centrifugal pump assembly is 2, and the two first filtering centrifugal pump assemblies are arranged in parallel, which improves the filtering effect and the pumping efficiency.

[0038] As shown in Figures 1-3As shown, the number of the second filter centrifugal pump assemblies is 2, the two second filter centrifugal pump assemblies are arranged in parallel, the second filter centrifugal pump assembly comprises a second filter 7 and a second centrifugal pump 8 which are sequentially communicated, the second storage container 4 is communicated with the second filter 7, the second centrifugal pump 8 is communicated with the third filter 9, the third filter 9 is communicated with the first-stage jet pump 16, the two second filter centrifugal pump assemblies are arranged in parallel, the filtering effect and the pumping efficiency are improved, the second centrifugal pump 8 pumps the ethylene glycol in the second storage container 4 into the third filter 9 for filtering, and then enters the first-stage jet pump 16 for spraying.

[0039] The first filter centrifugal pump assembly and the second filter centrifugal pump assembly control the flow and the flow direction through the valve combination, which will not be repeated here.

[0040] As shown in the figure, Figures 1-3 The first storage container 1 is communicated with a first residue filter 10, and the second storage container 4 is communicated with a second residue filter 11. The first storage container 1 is a liquid seal tank, and the second storage container 4 is a storage tank. Generally, the inside of the liquid seal tank is divided into an inner chamber and an outer chamber by a partition plate. The inner chamber is provided with an inner chamber residue removal device for residue removal, and then the residue enters the residue filter for further filtering. Similarly, the inside of the storage tank is also provided with an inner chamber residue removal device, and the residue in the storage tank enters the second residue filter 11 for further filtering, thereby reducing pollution. The ethylene glycol can be filtered and removed from the residue for five times, and the residue removal effect is good.

[0041] The first storage container 1 and the second storage container 4 are respectively provided with a liquid level gauge 22 to indicate the liquid level in the storage container. The pipeline after the first heat exchanger 2 and the second heat exchanger 3 is provided with a thermometer 23 to indicate the temperature of the condensed ethylene glycol, and is linked with a pneumatic control valve for controlling the condensate water, thereby controlling the flow of the condensate water and making the temperature of the ethylene glycol meet the requirements of the first-stage jet pump 16.

[0042] As shown in the figure, Figures 1-3 The first filter 5 and the second filter 7 are basket filters, the filter screen of the basket filter is 100 meshes, the third filter 9 is a candle filter, and the filtering precision is 3 μm, so that the filtering effect is good.

[0043] As shown in the figure, Figures 1-3As shown, the first centrifugal pump 6 outlet and the first heat exchanger 2 to be condensed glycol inlet between the two level condensation branch 13, the first storage container 1 of glycol into the second stage jet pump 24 and the third stage jet pump 25 for spraying, the second stage jet pump 24 and the third stage jet pump 25 using is not cooling glycol, and the flow is small, the temperature is high, generally does not exist cooling precipitation pipe blockage problem, so it is not necessary to pass through the second storage cooling slag, the first centrifugal pump 6 outlet and the first heat exchanger 2 between the inlet and the evaporation branch 20, glycol into the glycol evaporator 21.

[0044] Any numerical values recited herein include all values from the lower value to the upper value in increments of one unit, provided that there is a separation of at least 2 units between any lower value and any higher value. As an example, if a numerical value is recited as from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that values such as 15 to 85, 22 to 68, 43 to 51, and 30 to 32 are expressly enumerated. For values which are less than one, one unit is considered to be 0.0001, 0.001, 0.01, 0.1, or the like, as appropriate. These are only examples of what is specifically enumerated herein, and are intended to be cumulative for use in connection with the description of various examples herein.

[0045] Unless otherwise stated, all ranges include endpoints and all numbers between the endpoints. "Approximately" or "about" as applied to any numerical value means + / - 10% of the numerical value, unless otherwise indicated. "Approximately" or "about" as applied to a range means that the range is within 10% of the recited range, unless otherwise indicated.

[0046] All articles and references, including patents and publications, cited herein are hereby incorporated by reference for all purposes. The term "consisting essentially of to describe a combination shall include the elements, ingredients, components or steps identified, and such other elements ingredients, components or steps that do not materially affect the basic and novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, ingredients, components or steps herein also is taken to mean that other elements, ingredients, components or steps that do not materially affect the basic and novel characteristics of the combinations are optionally present. The use of the term "may" to describe any aspect of this application indicates that any aspect described in connection with the use of the term is optional.

[0047] Plural elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step might be divided into separate plural elements, components, parts, or steps. To the extent that the disclosure of elements, components, parts, or steps is expressed in terms of "containing," "comprising," "including," or "having," it should be understood that the elements, components, parts, or steps can also "consist essentially of or "consist of the recited elements, components, parts, or steps.

[0048] It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the technology should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated by reference for the purpose of the present disclosure. The omission of any aspect of the subject matter disclosed herein does not preclude coverage of such aspect, nor does it relinquish any right to such subject matter as may be set forth in the foregoing or subsequent disclosure.

Claims

1. A cooling and deslagging device for a glycol jet pump, characterized in that, include: The first storage container is used to store ethylene glycol. At least one first filter centrifugal pump assembly is used to filter ethylene glycol in the first storage container, and the first storage container is connected to the first filter centrifugal pump assembly; At least one heat exchanger is provided for condensing ethylene glycol, the heat exchanger being connected to the first filter centrifugal pump assembly, the first filter centrifugal pump assembly being used to pump ethylene glycol from the first storage container into the heat exchanger. A second storage container is used to store ethylene glycol, and the heat exchanger is connected to the second storage container; At least one second filter centrifugal pump assembly is provided for filtering ethylene glycol in the second storage container and pumping ethylene glycol in the second storage container into a first-stage jet pump, and a third filter is provided between the second filter centrifugal pump assembly and the first-stage jet pump.

2. The ethylene glycol jet pump cooling and de-slugging device of claim 1, wherein, The number of heat exchangers is two, namely a first heat exchanger and a second heat exchanger, which are connected in parallel.

3. The ethylene glycol jet pump cooling and de-slugging device of claim 2, wherein, The outlet of the second heat exchanger is provided with a primary condensation branch, which is connected to the first-stage jet pump.

4. The ethylene glycol jet pump cooling and de-slugging device of claim 3, wherein, The first filter centrifugal pump assembly includes a first filter and a first centrifugal pump connected in sequence. The first filter is connected to the first storage container, and the first centrifugal pump is connected to the first heat exchanger and the second heat exchanger.

5. The ethylene glycol jet pump cooling and de-slugging device of claim 4, wherein, The number of the first filter centrifugal pump assembly is 2, and the two first filter centrifugal pump assemblies are arranged in parallel.

6. The ethylene glycol jet pump cooling and de-slugging device of claim 5, wherein, The number of the second filter centrifugal pump assembly is two, and the two second filter centrifugal pump assemblies are arranged in parallel. The second filter centrifugal pump assembly includes a second filter and a second centrifugal pump connected in sequence. The second storage container is connected to the second filter, the second centrifugal pump is connected to the third filter, and the third filter is connected to the first stage jet pump.

7. The ethylene glycol jet pump cooling and de-slugging device of claim 1, wherein, The first storage container is connected to a first residue filter, and the second storage container is connected to a second residue filter.

8. The ethylene glycol jet pump cooling and de-slugging device of claim 1, wherein, The heat exchanger is a plate heat exchanger, the first storage container is a liquid seal tank, and the second storage container is a storage tank.

9. The ethylene glycol jet pump cooling and de-slugging device of claim 6, wherein, The first and second filters are basket filters, and the third filter is a candle filter.

10. The ethylene glycol jet pump cooling and de-slugging device of claim 4, wherein, A secondary condensation branch is provided between the outlet of the first centrifugal pump and the inlet of the first heat exchanger.

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