High-purity anthraquinone collecting device and using method thereof

Abstract

The invention relates to the technical field of anthraquinone collection, in particular to a high-purity anthraquinone collection device and a use method thereof. The device comprises a hot melting box, a liquid anthraquinone collector, a rectifying tower, a light component treatment system and a condensation cooling system, the outlet end of the hot melting box is communicated with the inlet end of the liquid anthraquinone collector, the outlet end of the liquid anthraquinone collector is communicated with the bottom inlet end of the rectifying tower, the inlet end of the light component treatment system is communicated with the top outlet end of the rectifying tower, and the condensation cooling system is communicated with the bottom outlet end of the rectifying tower. An automatic collecting system is adopted, the problem that a traditional thin-wall cooler needs to be shut down for cleaning is solved, continuous and stable operation of a production line is achieved, the production efficiency is greatly improved, and meanwhile the manual operation frequency and the labor intensity are reduced. The production efficiency, the product quality and the economic benefits are improved, meanwhile, environmental protection and resource recycling are considered, and the industrial application value is remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of anthraquinone collection, and more specifically, to a collection device for high-purity anthraquinone and its usage method. Background Art

[0002] As an important chemical intermediate, anthraquinone is widely used in fields such as dyes, papermaking, and pharmaceuticals. The collection process during its production directly affects product quality and production efficiency. Currently, in industry, thin-wall cooling method and sublimation cooling method are mainly used for anthraquinone collection, but both of these traditional methods have obvious technical defects.

[0003] In the thin-wall cooler method, anthraquinone is deposited on the wall of the cooler through natural cooling. However, this method requires frequent shutdown for cleaning, which not only affects production continuity but also brings potential safety hazards due to manual operation. Although the sublimation cooling method can achieve continuous operation, the spraying process results in the product being in a fine powder form and having a relatively high water content, increasing the difficulty of use for downstream customers. In addition, the purity of anthraquinone collected by these two methods is generally low, and additional refining treatment is required subsequently, significantly increasing the production cost.

[0004] With the continuous improvement of the industry's requirements for efficient, safe, and environmentally friendly production, developing a new collection technology that can operate continuously, produce high-purity granular anthraquinone with low water content has become a key issue that urgently needs to be broken through in this field. An ideal solution needs to take into account production efficiency, product quality, and operation safety, while reducing resource waste and environmental pollution to meet the needs of modern chemical production. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, an object of one aspect of the present invention is to provide a collection device for high-purity anthraquinone. The device includes a hot melt tank, a liquid anthraquinone collector, a rectification column, a light component treatment system, and a condensation and cooling system; the outlet end of the hot melt tank is communicated with the inlet end of the liquid anthraquinone collector, the outlet end of the liquid anthraquinone collector is communicated with the bottom inlet end of the rectification column, the inlet end of the light component treatment system is communicated with the top outlet end of the rectification column, the condensation and cooling system is communicated with the bottom outlet end of the rectification column, and the outlet end of the light component treatment system is communicated with the top inlet end of the rectification column.

[0006] Preferably, the light component treatment system includes a condensation and cooler, a reflux pump, and a flow meter. The first outlet end of the condensation and cooler is communicated with the top inlet end of the rectification column through the reflux pump and the flow meter.

[0007] Preferably, the light component treatment system further includes a component product tank. The second outlet end of the condensation and cooler is communicated with the inlet end of the light component product tank.

[0008] Preferably, the condensation and cooling system includes a shell-and-tube cooler, a liquid anthraquinone tank, and a flaker. The bottom outlet end of the rectification column is communicated with the inlet end of the shell-and-tube cooler, the outlet end of the shell-and-tube cooler is communicated with the inlet end of the liquid anthraquinone tank, and the outlet end of the liquid anthraquinone tank is communicated with the inlet end of the flaker.

[0009] Preferably, the device further includes an anthraquinone pump, and the liquid anthraquinone collector is communicated with the rectification column through the anthraquinone pump.

[0010] Another object of the present invention is to provide a method for using a high-purity anthraquinone collection device. The specific steps of the method are as follows: S1. Introduce the gaseous mixture of anthraquinone and air into the hot-melt box, crystallize through heat transfer oil heat exchange, and then reheat and liquefy it into liquid anthraquinone; S2. Collect the liquid anthraquinone into the liquid anthraquinone collector; S3. The liquid anthraquinone collector draws out liquid anthraquinone through an anthraquinone pump, enters the rectification column through the bottom inlet of the rectification column, and divides the liquid anthraquinone into gaseous light components and concentrated liquid anthraquinone through distillation. The gaseous light components enter the condensation and cooler, and the concentrated liquid anthraquinone enters the shell-and-tube cooler; S4. The gaseous light components are transformed into liquid products through the condensation and cooler. Part of them enters the rectification column through the top inlet of the rectification column after passing through the reflux pump and flowmeter, and the other part enters the light component product tank; S5. The concentrated liquid anthraquinone enters the shell-and-tube cooler to be cooled down and then enters the liquid anthraquinone tank. The concentrated liquid anthraquinone in the tank enters the flaker to form granular anthraquinone products.

[0011] Preferably, the heating temperature of the hot-melt box in S1 is 300°C - 310°C.

[0012] Preferably, in S3, the rectification column is under negative pressure distillation, the pressure is 80 kPa - 85 kPa, the distillation temperature at the top of the rectification column is 285°C - 290°C, and the distillation temperature at the bottom of the rectification column is 310°C - 320°C.

[0013] Preferably, the outlet temperature of the shell-and-tube cooler in S3 is 290°C - 300°C.

[0014] Preferably, the outlet temperature of the condensation and cooler in S4 is 240°C - 260°C.

[0015] The beneficial effects of the present invention are as follows: Continuous and efficient production: An automated collection system is adopted, avoiding the problem of the need to stop the machine for cleaning in the traditional thin-wall cooler, realizing the continuous and stable operation of the production line, greatly improving the production efficiency, and at the same time reducing the manual operation frequency and labor intensity.

[0016] Improving product quality: The collected anthraquinone is in the form of uniform granules with good fluidity, facilitating transportation and subsequent processing. At the same time, the product has a low moisture content, reducing the drying process and meeting the demand of downstream customers for high-quality anthraquinone.

[0017] High purity and low cost: The optimized condensation and separation process can effectively reduce the mixing of impurities, improve the purity of anthraquinone, lower the subsequent refining cost, and enhance market competitiveness.

[0018] Green environmental protection: The system adopts a closed-loop circulation design, without waste gas emissions, reducing environmental pollution. At the same time, the light-component liquid generated during the production process is subjected to secondary distillation and recovery, improving resource utilization rate and meeting the requirements of sustainable development.

[0019] While improving production efficiency, product quality and economic benefits, the present invention takes into account environmental protection and resource recycling, and has significant industrial application value.

[0020] The additional aspects and advantages of the present invention will become apparent in the following description or be understood through the practice of the present invention. Description of the Drawings

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein: Figure 1 is the equipment flow chart of the present invention; Wherein, Figure 1 The corresponding relationship between the reference numerals in the drawings and the component names is as follows: 1 is a hot melt tank, 2 is a liquid anthraquinone collector, 3 is an anthraquinone pump, 4 is a rectifying column, 5 is a shell-and-tube cooler, 6 is a liquid anthraquinone tank, 7 is a flaker, 8 is a condensation cooler, 9 is a reflux pump, 10 is a flow meter, and 11 is a light-component product tank. Detailed Embodiments

[0022] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0024] The present invention provides a device for collecting high-purity anthraquinone, which includes a hot-melting box 1, a liquid anthraquinone collector 2, an anthraquinone pump 3, a rectifying column 4, a shell-and-tube cooler 5, a liquid anthraquinone tank 6, a flaker 7, a condensation cooler 8, a reflux pump 9, a flowmeter 10 and a light-component product tank 11.

[0025] The outlet end of the hot-melting box 1 is communicated with the inlet end of the liquid anthraquinone collector 2. The outlet end of the liquid anthraquinone collector 2 is communicated with the bottom inlet end of the rectifying column 4 through the anthraquinone pump 3. The inlet end of the condensation cooler 8 is communicated with the top outlet end of the rectifying column 4. The first outlet end of the condensation cooler 8 is communicated with the top inlet end of the rectifying column 4 through the reflux pump 9 and the flowmeter 10. The second outlet end of the condensation cooler 8 is communicated with the inlet end of the light-component product tank 11. The bottom outlet end of the rectifying column 4 is communicated with the inlet end of the shell-and-tube cooler 5. The outlet end of the shell-and-tube cooler 5 is communicated with the inlet end of the liquid anthraquinone tank 6. The outlet end of the liquid anthraquinone tank 6 is communicated with the inlet end of the flaker 7.

[0026] Example 1 S1. Introduce the gaseous mixture of anthraquinone and air into the hot-melting box 1, crystallize it through heat transfer oil heat exchange and then reheat it to be liquefied into liquid anthraquinone, and the heating temperature is 310 °C. S2. Collect the liquid anthraquinone into the liquid anthraquinone collector 2. S3. The liquid anthraquinone is led out from the liquid anthraquinone collector through the anthraquinone pump 3 and enters the rectifying column 4 through the bottom inlet of the rectifying column 4. The rectifying column 4 is under vacuum distillation, and the pressure is 80 kPa. The top distillation temperature of the rectifying column 4 is 285 °C, and the bottom distillation temperature of the rectifying column 4 is 310 °C. The liquid anthraquinone is separated into gaseous light components and concentrated liquid anthraquinone through distillation. The gaseous light components enter the condensation cooler 8, and the concentrated liquid anthraquinone enters the shell-and-tube cooler 5. S4. The gaseous light components are transformed into liquid products through the condensation cooler 8. The outlet temperature of the condensation cooler 8 is 250 °C. One part enters the rectifying column 4 from the top inlet of the rectifying column 4 after passing through the reflux pump 9 and the flowmeter 10, and the other part enters the light-component product tank 11. S5. The concentrated liquid anthraquinone enters the shell-and-tube cooler 5 to be cooled down and then enters the liquid anthraquinone tank 6. The outlet temperature of the shell-and-tube cooler 5 is 295 °C. The concentrated liquid anthraquinone in the tank 6 enters the flaker 7 to form granular anthraquinone products.

[0027] The flaked anthraquinone produced by this example has a purity of 99.80% measured by chemical method and a purity of 99.20% measured by gas chromatograph. The initial melting point of the dry product is 284.3 °C, meeting the national standard for first-class products. The measured pouring density is 404 kg / m 3 , effectively reducing the transportation cost and improving the performance of the product at the same time.

[0028] Example 2 S1. Introduce the gaseous mixture of anthraquinone and air into the hot melt tank 1, crystallize it through heat exchange with heat transfer oil and then reheat and liquefy it into liquid anthraquinone, with the heating temperature being 300 °C; S2. Collect the liquid anthraquinone into the liquid anthraquinone collector 2; S3. The liquid anthraquinone collector draws out liquid anthraquinone through the anthraquinone pump 3 and enters the distillation column 4 through the bottom inlet of the distillation column 4. The distillation column 4 is under negative pressure distillation, with the pressure being 80 kPa. The top distillation temperature of the distillation column 4 is 290 °C and the bottom distillation temperature of the distillation column 4 is 320 °C. The liquid anthraquinone is divided into gaseous light components and concentrated liquid anthraquinone through distillation. The gaseous light components enter the condensation cooler 8, and the concentrated liquid anthraquinone enters the shell-and-tube cooler 5; S4. The gaseous light components are transformed into liquid products through the condensation cooler 8. The outlet temperature of the condensation cooler 8 is 260 °C. Part of it enters the distillation column 4 through the top inlet of the distillation column 4 after passing through the reflux pump 9 and the flowmeter 10, and the other part enters the light component product tank 11; S5. The concentrated liquid anthraquinone enters the shell-and-tube cooler 5 to cool down and then enters the liquid anthraquinone tank 6. The outlet temperature of the shell-and-tube cooler 5 is 300 °C. The concentrated liquid anthraquinone in the tank 6 enters the flaker 7 to form granular anthraquinone products.

[0029] For the flaked anthraquinone produced by this embodiment, the purity measured by chemical method is 99.76%, the purity measured by gas chromatograph is 99.23%, the initial melting point of the dry product is 284.4 °C, meeting the national standard excellent product standard. The measured pouring density is 412 kg / m 3 , effectively reducing the transportation cost and at the same time improving the use performance of the product.

[0030] The following Table 1 shows the data comparison between the embodiment and the existing method: Table 1. Data Comparison The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, various modifications and changes can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for collecting high-purity anthraquinone, characterized in that: The device comprises a hot melt box (1), a liquid anthraquinone collector (2), a distillation tower (4), a light component processing system and a condensation cooling system; the outlet end of the hot melt box (1) is connected to the inlet end of the liquid anthraquinone collector (2), the outlet end of the liquid anthraquinone collector (2) is connected to the bottom inlet end of the distillation tower (4), the inlet end of the light component processing system is connected to the top outlet end of the distillation tower (4), the condensation cooling system is connected to the bottom outlet end of the distillation tower (4), and the outlet end of the light component processing system is connected to the top inlet end of the distillation tower (4).

2. A high-purity anthraquinone collection device according to claim 1, characterized in that: The light component processing system comprises a condenser cooler (8), a reflux pump (9) and a flow meter (10); the first outlet end of the condenser cooler (8) is connected to the top inlet end of the distillation tower (4) through the reflux pump (9) and the flow meter (10).

3. The high-purity anthraquinone collection device according to claim 1, characterized in that: The light component processing system further comprises a component product tank (11), and the second outlet end of the condenser cooler (8) is connected to the inlet end of the light component product tank (11).

4. The high-purity anthraquinone collection device according to claim 1, characterized in that: The condensation cooling system comprises a tube cooler (5), a liquid anthraquinone tank (6) and a flaker (7); the bottom outlet of the rectification tower (4) is connected to the inlet of the tube cooler (5); the outlet of the tube cooler (5) is connected to the inlet of the liquid anthraquinone tank (6); and the outlet of the liquid anthraquinone tank (6) is connected to the inlet of the flaker (7).

5. The high-purity anthraquinone collection device according to claim 1, characterized in that: The device further comprises an anthraquinone pump 3, and the liquid anthraquinone collector (2) is connected to the distillation tower (4) via the anthraquinone pump (3).

6. The method for using the high-purity anthraquinone collection device according to claim 1, characterized in that: The specific steps of the method of use are: S1. A gaseous mixture of anthraquinone and air is introduced into a hot melt box (1), and then heated and liquefied into liquid anthraquinone after crystallization through heat transfer oil; S2. collecting the liquid anthraquinone into the liquid anthraquinone collector (2); S3. The liquid anthraquinone collector draws out liquid anthraquinone through the anthraquinone pump (3), and enters the distillation tower (4) through the bottom inlet of the distillation tower (4). The liquid anthraquinone is separated into a gaseous light component and concentrated liquid anthraquinone by distillation. The gaseous light component enters the condenser cooler (8), and the concentrated liquid anthraquinone enters the tube cooler (5); S4. The gaseous light component is converted into a liquid product through a condenser cooler (8), a part of which enters the distillation tower (4) from the top inlet of the distillation tower (4) through a reflux pump (9) and a flow meter (10), and the other part enters the light component product tank (11); S5. The concentrated liquid anthraquinone enters the tube cooler (5) for cooling and then enters the liquid anthraquinone tank (6). The concentrated liquid anthraquinone in the tank (6) enters the flake forming machine (7) to form a granular anthraquinone product.

7. The method for using a high-purity anthraquinone collection device according to claim 1, characterized in that: The heating temperature of the hot melt box (1) in S1 is 300°C-310°C.

8. The method for using the high-purity anthraquinone collection device according to claim 1, characterized in that: The distillation tower (4) in S3 is a negative pressure distillation tower with a pressure of 80 kPa-85 kPa. The distillation temperature at the top of the distillation tower (4) is 285°C-290°C, and the distillation temperature at the bottom of the distillation tower (4) is 310°C-320°C.

9. The method for using the high-purity anthraquinone collection device according to claim 1, characterized in that: The outlet temperature of the tube cooler (5) in S3 is 290°C-300°C.

10. The method for using the high-purity anthraquinone collection device according to claim 1, characterized in that: The outlet temperature of the condenser cooler (8) in S4 is 240°C-260°C.

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