CN216497560U

CN216497560U - Improved PBT byproduct purification and recovery device

Info

Publication number: CN216497560U
Application number: CN202123034555.2U
Authority: CN
Inventors: 蒋兴; 李建民; 吴固越; 苏鑫
Original assignee: Wuxi Xingsheng New Material Science & Technology Co ltd
Current assignee: Wuxi Xingsheng New Material Science & Technology Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-05-13
Anticipated expiration: 2031-12-06

Abstract

The utility model provides an improved PBT byproduct purification and recovery device, which relates to the technical field of purification and recovery and solves the problems that the existing PBT byproduct purification device has a simpler structure and is wasted in the purification process, and comprises a base, wherein an extraction separation tower is arranged at the top of the base, a feeding pipe is vertically arranged at the top of the extraction separation tower, a spiral heat exchanger is arranged at one side of the extraction separation tower, a tubular condenser is arranged at the other side of the extraction separation tower, one side of the top of the extraction separation tower is connected with the tubular condenser through a high-pressure pipe, one side of the tubular condenser is connected with a first rectifying tower through a high-pressure pipe, one side of the bottom of the first rectifying tower is connected with a second rectifying tower through a high-pressure pipe, one side of the bottom of the second rectifying tower is connected with a third rectifying tower through a high-pressure pipe, one side of the third rectifying tower is connected with a finished product tank through a high-pressure pipe, and the bottom end of the finished product tank is provided with a discharge pipe. The device enables byproducts to be purified to the maximum extent through the design of a multilayer rectifying tower.

Description

Improved PBT byproduct purification and recovery device

Technical Field

The utility model belongs to the technical field of purification and recovery, and particularly relates to an improved PBT byproduct purification and recovery device.

Background

Chinese patent CN201420698950.1 discloses a THF product device is retrieved in purification of flexibility this patent it includes first rectifying column and second rectifying column, first rectifying column bottom links to each other through first discharging pipe and second inlet pipe and second rectifying column one side middle part, second rectifying column top passes through the second discharging pipe and links to each other with condenser upper portion, first rectifying column bottom links to each other with plate heat exchanger one side through first discharging pipe and heat exchanger inlet pipe, is equipped with the export of heat exchanger cooling water with one side plate heat exchanger opposite side upper portion is equipped with the second finished product discharge gate, is equipped with heat exchanger cooling water inlet with one side lower part be equipped with first governing valve on the second inlet pipe be equipped with the second governing valve on the heat exchanger inlet pipe. The utility model reduces the energy consumption cost of THF, can simultaneously produce THF products with two specifications, and improves the flexibility of the device.

Based on the above, the present inventors found that the following problems exist: the purification device has a simple structure, wastes are generated in the purification process, and the waste liquid generated in the purification process is not subjected to centralized treatment.

Therefore, in view of the above, research and improvement are made for the existing structure and defects, and an improved PBT byproduct purification and recovery device is provided to achieve the purpose of higher practical value.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides an improved PBT byproduct purifying and recycling device, which aims to solve the problems that the existing PBT byproduct purifying device is simple in structure and wastes in the purifying process.

The purpose and the effect of the improved PBT byproduct purification and recovery device are achieved by the following specific technical means:

the utility model provides a modified PBT by-product purification recovery unit, includes the base, the top of base is installed and is drawed the knockout tower, just the inside of base is equipped with the waste liquid and retrieves the cavity, draw the top of knockout tower and install the inlet pipe perpendicularly, one side of drawing the knockout tower is equipped with spiral heat exchanger, just the opposite side of drawing the knockout tower is equipped with the tube condenser, the top one side of drawing the knockout tower is connected with the tube condenser through the high-pressure pipe, there is first rectifying column one side of tube condenser through high-pressure union coupling, there is the second rectifying column bottom one side of first rectifying column through high-pressure union coupling, there is the third rectifying column bottom one side of second rectifying column through high-pressure union coupling, there is the finished product jar one side of third rectifying column through high-pressure union coupling, just the bottom of finished product jar is equipped with the discharging pipe.

Furthermore, a waste liquid collecting tank is arranged below the second rectifying tower and the third rectifying tower, and the bottom ends of the second rectifying tower and the third rectifying tower are connected with the surface of the waste liquid collecting tank through a high-pressure pipe.

Further, the inside of waste liquid collection tank is equipped with the filter, the one end of waste liquid collection tank is connected with bottom one side of drawing the knockout tower through the high-pressure pipe.

Further, the top of the spiral heat exchanger is connected with the top of the extraction and separation tower through a high-pressure pipe, and one side of the bottom end of the spiral heat exchanger is connected with the bottom of the extraction and separation tower through a high-pressure pipe.

Furthermore, a second circulating pump is sleeved on the high-pressure pipes of the first rectifying tower and the second rectifying tower, and a first circulating pump is sleeved on the high-pressure pipes of the third rectifying tower and the finished product tank.

Further, the internal air pressure value of the first rectifying tower is greater than the internal air pressure value of the second rectifying tower, and the second rectifying tower is a normal air pressure value.

Furthermore, a plurality of heaters are arranged inside the extraction separation tower, and the temperature inside the extraction separation tower is gradually increased from top to bottom.

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

according to the sectional rectification design of the first rectification tower, the second rectification tower and the third rectification tower, most of moisture, low-boiling-point substances and high-boiling-point substances in the PBT gas can be effectively cleaned, so that the concentration of PBT byproducts is improved, and then the PBT gas which initially enters the extraction separation tower can be initially separated by optimizing the temperature contrast reflux form at the tower top, so that the later-stage purification efficiency and purification concentration are improved.

Drawings

FIG. 1 is a schematic diagram of an improved PBT byproduct purification and recovery device.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a base; 2. an extraction separation column; 3. a spiral heat exchanger; 4. a feed pipe; 5. a tubular condenser; 6. a first rectification column; 7. a second rectification column; 8. a third rectifying column; 9. a waste liquid collection tank; 10. a finished product tank; 11. a first circulation pump; 12. and a second circulation pump.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figure 1:

the utility model provides an improved PBT byproduct purification and recovery device, which comprises a base 1, wherein an extraction separation tower 2 is arranged at the top of the base 1, a waste liquid recovery chamber is arranged in the base 1, a feeding pipe 4 is vertically arranged at the top of the extraction separation tower 2, a spiral heat exchanger 3 is arranged at one side of the extraction separation tower 2, a tubular condenser 5 is arranged at the other side of the extraction separation tower 2, one side of the top of the extraction separation tower 2 is connected with the tubular condenser 5 through a high-pressure pipe, one side of the tubular condenser 5 is connected with a first rectifying tower 6 through a high-pressure pipe, one side of the bottom of the first rectifying tower 6 is connected with a second rectifying tower 7 through a high-pressure pipe, one side of the bottom of the second rectifying tower 7 is connected with a third rectifying tower 8 through a high-pressure pipe, one side of the third rectifying tower 8 is connected with a finished product tank 10 through a high-pressure pipe, and the bottom of the finished product tank 10 is provided with a discharge pipe, PBT gas can be treated and separated through the design of the extraction separation tower 2, moisture is removed through the first rectifying tower 6, low-boiling-point substances in the PBT gas can be removed through the second rectifying tower 7, high-boiling-point substances in the PBT can be removed through the third rectifying tower 8, and thus a PBT byproduct with higher concentration can be obtained.

Wherein, the below of second rectifying column 7 and third rectifying column 8 is equipped with waste liquid collecting tank 9, just the bottom of second rectifying column 7 and third rectifying column 8 is connected with waste liquid collecting tank 9's surface through the high-pressure pipe, and wherein waste liquid collecting tank 9 can collect the processing with the waste liquid that produces in second rectifying column 7 and the third rectifying column 8 to carry to extracting knockout tower 2 in through the high-pressure pipe, concentrate the recovery through the garbage recovery equipment that is equipped with in the base 1, prevent waste liquid polluted environment.

Wherein, the inside of waste liquid collection tank 9 is equipped with the filter, the one end of waste liquid collection tank 9 is connected with bottom one side of extracting and separating tower 2 through the high-pressure pipe.

Wherein, the top of spiral heat exchanger 3 is connected with the top of extracting knockout tower 2 through the high-pressure pipe, just bottom one side of spiral heat exchanger 3 is connected with the bottom of extracting knockout tower 2 through the high-pressure pipe.

Wherein, the cover is equipped with second circulating pump 12 on the high-pressure tube of first rectifying column 6 and second rectifying column 7, the cover is equipped with first circulating pump 11 on the high-pressure tube of third rectifying column 8 and finished product jar 10.

Wherein, the inside atmospheric pressure numerical value of first rectifying column 6 is greater than the atmospheric pressure numerical value of the inside of second rectifying column 7, and second rectifying column 7 is normal atmospheric pressure numerical value, through the settlement of different atmospheric pressure numerical values, can carry out different degrees purification separation to the material that gets into in the rectifying column, clears up most moisture content and the low boiling thing in the material.

Wherein, draw the inside a plurality of heaters that are equipped with of knockout tower 2, just temperature top-down progressively increases in the tower of knockout tower 2, through the design of different temperatures, can carry out preliminary separation with the coarse fodder that gets into in the knockout tower 2 to improve the purification effect and the efficiency in later stage.

The specific use mode and function of the embodiment are as follows:

in the utility model, before the device is used, PBT gas is conveyed into an extraction separation tower 2 through a feed pipe 4, different heaters in the extraction separation tower 2 enable the temperature in the tower to be different temperature spaces from top to bottom, further PBT gas entering the tower can be subjected to primary crude separation, the separated gas enters a first rectifying tower 6 after being pressurized and cooled through a tubular condenser 5, most of moisture in the gas can be removed by the first rectifying tower 6, the removed gas enters a second rectifying tower 7 to remove low-boiling-point substances in the gas, the removed gas enters a third rectifying tower 8 to remove high-boiling-point substances in the gas, the final finished product is conveyed into a finished product tank 10 through a high-pressure pipe, discharge holes are formed in the bottom ends of the first rectifying tower 6 and the second rectifying tower 7, the PBT primary product can be collected, wherein a spiral heat exchanger 3 can heat waste liquid separated in the extraction separation tower 2, and is conveyed to the extraction separation tower 2 again through a high-pressure pipe for secondary extraction, thereby improving the utilization rate of the PBT byproduct.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a modified PBT accessory substance purification recovery unit which characterized in that: comprises a base (1), an extraction separation tower (2) is installed at the top of the base (1), a waste liquid recovery cavity is arranged inside the base (1), an inlet pipe (4) is vertically installed at the top of the extraction separation tower (2), a spiral heat exchanger (3) is arranged at one side of the extraction separation tower (2), a tubular condenser (5) is arranged at the other side of the extraction separation tower (2), one side of the top of the extraction separation tower (2) is connected with the tubular condenser (5) through a high-pressure pipe, one side of the tubular condenser (5) is connected with a first rectifying tower (6) through a high-pressure pipe, one side of the bottom of the first rectifying tower (6) is connected with a second rectifying tower (7) through a high-pressure pipe, one side of the bottom of the second rectifying tower (7) is connected with a third rectifying tower (8) through a high-pressure pipe, one side of the third rectifying tower (8) is connected with a finished product tank (10) through a high-pressure pipe, and a discharge pipe is arranged at the bottom end of the finished product tank (10).

2. The improved PBT byproduct purifying and recycling device of claim 1, wherein: the lower part of second rectifying column (7) and third rectifying column (8) is equipped with waste liquid collecting tank (9), just the bottom of second rectifying column (7) and third rectifying column (8) is connected with the surface of waste liquid collecting tank (9) through the high-pressure pipe.

3. The improved PBT byproduct purifying and recycling device of claim 2, wherein: the inside of waste liquid collection tank (9) is equipped with the filter, the one end of waste liquid collection tank (9) is connected with bottom one side of drawing knockout tower (2) through the high-pressure pipe.

4. The improved PBT byproduct purifying and recycling device of claim 1, wherein: the top of the spiral heat exchanger (3) is connected with the top of the extraction and separation tower (2) through a high-pressure pipe, and one side of the bottom end of the spiral heat exchanger (3) is connected with the bottom of the extraction and separation tower (2) through the high-pressure pipe.

5. The improved PBT byproduct purifying and recycling device of claim 1, wherein: the second circulating pump (12) is sleeved on the high-pressure pipes of the first rectifying tower (6) and the second rectifying tower (7), and the first circulating pump (11) is sleeved on the high-pressure pipes of the third rectifying tower (8) and the finished product tank (10).

6. The improved PBT byproduct purifying and recycling device of claim 1, wherein: the internal air pressure value of the first rectifying tower (6) is larger than the internal air pressure value of the second rectifying tower (7), and the second rectifying tower (7) is a normal air pressure value.

7. The improved PBT byproduct purifying and recycling device of claim 1, wherein: a plurality of heaters are arranged in the extraction separation tower (2), and the temperature in the extraction separation tower (2) is gradually increased from top to bottom.