CN216170569U

CN216170569U - Pressure filtration system

Info

Publication number: CN216170569U
Application number: CN202122403052.1U
Authority: CN
Inventors: 潘俊鹏; 杨占东; 谢凯捷
Original assignee: Fujian Fuhaichuang Petrochemical Co ltd
Current assignee: Fujian Fuhaichuang Petrochemical Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-04-05
Anticipated expiration: 2031-09-30

Abstract

The utility model provides a pressure filtration system, which comprises a flash evaporation steam tank, a pressure filter, a washing tower and a recovery device which are sequentially communicated. The pressure filtering system of the utility model utilizes redundant steam to provide power for the pressure filter, and simultaneously, the steam discharged outside is recycled, thus saving energy; in addition, after the steam is used for the pressure filter, the steam has high purity and is easier to be reused.

Description

Pressure filtration system

Technical Field

The utility model relates to the technical field of chemical equipment, in particular to a pressure filtering system.

Background

PTA is the acronym of its English name Purified Terephthalic Acid, which is white powder at normal temperature, low in toxicity, flammable and explosive. The application of PTA is concentrated, more than 90% of PTA in the world is used for producing polyester, China is the biggest PTA producing country in the world, China enters the rapid development stage of PTA industry since 2010, and the technological process of PTA production can be divided into an oxidation unit and a hydrofining unit. The raw material p-xylene takes acetic acid as a solvent, is oxidized under the action of a catalyst to form crude terephthalic acid, and is crystallized, filtered and dried to form a crude product; the crude terephthalic acid is hydrogenated to remove impurities, and then is crystallized, centrifugally separated and dried to obtain a PTA finished product.

In the prior art, in a PTA hydrofining unit, a pressure filter uses nitrogen as power, the recovery value is low after discharge, the investment ratio is not economical, and in addition, with the increase of the starting time of the device, steam which cannot be consumed is discharged outside in a recovery device, so that energy and water resources are wasted.

How to utilize new technology, new patent to reform transform the upgrading device, reduce the consumption of device energy and material, become the technical problem who awaits solution urgently.

In view of the above, the present invention is particularly proposed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pressure filtering system, which utilizes redundant steam to provide power for a pressure filter, simultaneously recycles the externally discharged steam, and saves energy.

In order to solve the technical problem, the utility model provides a pressure filtration system which comprises a flash evaporation steam tank, a pressure filter, a washing tower and a recovery device which are sequentially communicated.

Further, the flash evaporation steam tank comprises one or two of a crystallizer and a condensate tank.

Further, the crystallizer and the condensate tank are connected in parallel, the crystallizer and the condensate tank are both provided with flash steam outlets, and the flash steam outlets are both communicated with the pressure filter.

Further, the washing tower is provided with a recovery steam outlet, and the recovery steam outlet is communicated with a recovery device.

Further, the recovery device comprises one or two of a preheater and a generator.

Further, the preheater and the generator are arranged in parallel, and the inlet of the preheater and the inlet of the generator are communicated with the recovered steam outlet.

Furthermore, a first steam regulating valve is arranged on a pipeline between a flash evaporation steam outlet of the crystallizer and the pressure filter.

Furthermore, a first steam regulating valve is arranged on a pipeline between a flash evaporation steam outlet of the condensate tank and the pressure filter.

Furthermore, a second steam regulating valve is arranged on a pipeline between the recovered steam outlet and the inlet of the preheater.

Furthermore, a second steam regulating valve is arranged on a pipeline between the recovered steam outlet and the inlet of the generator.

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

the pressure filtering system of the utility model utilizes redundant steam to provide power for the pressure filter, and simultaneously, the steam discharged outside is recycled, thus saving energy; in addition, after the steam is used for the pressure filter, the purity of the steam is high, and the steam is easier to reuse.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a pressure filtration system according to the present invention;

description of reference numerals:

1-a pressure filter; 2-a washing tower;

31-a crystallizer; 32-a condensate tank;

301-flash steam outlet; 401-a first steam regulating valve;

201-a recovered vapor outlet; 51-a preheater;

52-a generator; 501-second steam regulating valve.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, 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, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the pressure filtration system provided by the utility model comprises a flash steam tank, a pressure filter 1, a washing tower 2 and a recovery device which are sequentially communicated, flash steam enters the pressure filter 1 to provide power for the pressure filter 1 and simultaneously carry out solid-liquid separation, the separated steam is also carried with fixed particles, and then enters the washing tower 2 to be washed and separated out of the fixed particles and then enters the recovery device to be recovered.

Specifically, the flash vapor tank includes one or both of a crystallizer 31 and a condensate tank 32. In this embodiment, crystallizer 31 and the parallelly connected setting of lime set 32, crystallizer 31 and lime set 32 all are provided with flash steam outlet 301, and flash steam outlet 301 all communicates with the entry of pressure filter 1, and flash steam that the flash steam that crystallizer 31 came out and the flash steam that lime set 32 came out get into pressure filter 1 simultaneously, unnecessary steam that can make full use of whole device production. Preferably, a first steam regulating valve 401 is arranged on a pipeline between the flash steam outlet 301 of the crystallizer 31 and the pressure filter 1, a first steam regulating valve 401 is arranged on a pipeline between the flash steam outlet 301 of the condensate tank 32 and the pressure filter 1, and the first steam regulating valve 401 can regulate the steam flow on the two pipelines.

The washing tower 2 is provided with a recovered steam outlet 201, the recovered steam outlet 201 is communicated with a recovery device, the recovery device comprises one or two of a preheater 51 and a generator 52, and the recovered steam enters the preheater for preheating and then enters a subsequent process for recycling, or can be directly connected with the generator for waste heat power generation. In this embodiment, the preheater 51 and the generator 52 are arranged in parallel, and both the inlet of the preheater 51 and the inlet of the generator 52 are communicated with the recovered steam outlet 201. Preferably, a second steam control valve 501 is provided in a pipeline between the recovered steam outlet 201 and the inlet of the preheater 51, and a second steam control valve 501 is provided in a pipeline between the recovered steam outlet 201 and the inlet of the generator 52. The second steam control valve 501 can control the steam flow on the two recovery lines.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure filtration system is characterized by comprising a flash evaporation steam tank, a pressure filter, a washing tower and a recovery device which are sequentially communicated;

the flash evaporation steam tank comprises one or two of a crystallizer and a condensate tank;

the crystallizer and the condensate tank are arranged in parallel, flash steam outlets are formed in the crystallizer and the condensate tank and communicated with the pressure filter.

2. A pressure filtration system according to claim 1, wherein the scrubber tower is provided with a recovery vapor outlet, the recovery vapor outlet being in communication with a recovery device.

3. A pressure filtration system as claimed in claim 2, wherein the recovery means comprises one or both of a preheater and a generator.

4. A pressure filtration system according to claim 3, wherein the preheater and generator are arranged in parallel, the inlet of the preheater and the inlet of the generator both being in communication with the recovery steam outlet.

5. A pressure filtration system according to claim 4, wherein a first steam regulating valve is provided in the conduit between the flash steam outlet of the crystallizer and the pressure filter.

6. A pressure filtration system as claimed in claim 5 wherein a first steam control valve is provided in the conduit between the flash steam outlet of the condensate tank and the pressure filter.

7. The pressure filtration system of claim 6, wherein a second steam adjustment valve is disposed in the line between the recovery steam outlet and the inlet of the preheater.

8. The pressure filtration system of claim 7, wherein a second steam adjustment valve is disposed in the conduit between the recovered steam outlet and the inlet of the generator.