TWI421247B - Online process for rejubenating whole stream of contaminated lean sulfolane in an extraction system - Google Patents

Description

Regeneration equipment and method for regenerating polluted cyclobutyl hydrazine solvent

An apparatus and method for regenerating contaminated cyclobutyl hydrazine solvent on-line, and more particularly to an apparatus and method for maintaining the quality of a cyclobutyl hydrazine solvent in an aromatic hydrocarbon extraction system, thereby reducing the consumption of the cyclobutyl hydrazine solvent.

Sulfolane, C ₄ H ₈ O ₂ S is also known as 1-tetrahydrothiophene and tetramethylene sulfone. Cyclobutanthine is widely used as a solvent for extraction and reaction. It is obtained by extracting aromatic hydrocarbon products such as benzene, toluene and xylene from a solution containing non-aromatic hydrocarbons such as alkanes and cycloalkanes. It is also used to separate n-propanol and isobutanol. It is also used to extract natural gas or to separate fatty acids into saturated and unsaturated components.

The cyclobutyl fluorene unit is usually installed in an aromatic hydrocarbon production system, and is derived from a reformate or a pyrolysis gasoline to separate high-purity products such as benzene, toluene and xylene. In current aromatic hydrocarbon production systems, the cyclobutylene unit is typically installed behind the media oil fractionation column.

In the cyclobutane extraction column, the aromatic hydrocarbon is dissolved in the cyclobutane solvent to form an extract layer (at the bottom of the column), and the residual non-aromatic hydrocarbon component is continuously countercurrently contacted with the cyclobutyl hydrazine solvent to contain the aromatic hydrocarbon. The extract is cleaned and extracted into the remaining oil and taken out from the top of the tower. In order to improve the extraction efficiency, the extraction plate can be equipped with a rotary baffle to form an RDC (ie, a rotary turret).

The top ring of the sulfonium solvent can be passed through a coalescer and then recovered from the raffinate via a clean water scrubber. Finally, the clean raffinate oil can be used as a gasoline component and blended into a finished gasoline product.

In the cyclobutylene system, there are often serious corrosion problems. Commonly contaminated cyclopentane The areas where the agent is corroded include a rich solvent line, an extraction oil stripper, a reboiler, a transfer line, a solvent recovery column, and a reboiler for the solvent recovery column. As corrosion increases, equipment may penetrate through, causing small holes that cause safety and hazards.

The root cause of corrosion is the accumulation of solvents in the circulation of acidic pollutants. The contaminated cyclobutyl hydrazine solvent changes from colorless to black, the viscosity increases to a gel, the acidity increases (the pH decreases to 4 or lower), and the corrosivity also increases. The four major causes of corrosion of the cyclohexane solvent extraction unit are: 1. Oxygen in the equipment (into the equipment or follow-up with the feed), 2. Oxygen in the circulating solvent, 3. Accumulated solvent aging in the equipment, 4. The high temperature of the reboiler.

The aged and corrosive substances of the solvent are viscose, have an odor and are difficult and unacceptable to handle. After years of operation, these aging materials and corrosives will accumulate, resulting in system blockage, increased pressure difference of activated carbon adsorption bed, and more importantly, the heat transfer coefficient of the heat exchanger is reduced, resulting in reduced operating efficiency. Not only that, these pollutants accumulated in the system are often corrosive substances, a catalyst that accelerates the aging of the solvent and forms more aging materials. The easiest way to control corrosion is to add monoethanolamine to neutralize its acidity, but it causes more solvent contamination. From the operational experience, the extraction system must be thoroughly removed after a period of operation to operate smoothly. When a commercial extraction equipment was removed, 10 to 15 m ³ (about 10 to 15 metric tons) of dirt was taken out. Thorough removal of the cyclohexane solvent extraction system is indeed a difficult task.

Keep the cyclohexane solvent extraction cycle system clean, the following methods:

1. Install a filter bed or cartridge on the lean cyclohexane solvent transfer line to filter out aged materials and corrosives. The problem is that the filter bed or filter is quickly filled with a large amount of aging and corrosive impact. mostly Commercial extraction workshops are equipped with such filters, but because of the difficulty of operation and the short operating cycle, they are often bypassed and rendered useless.

2. Install a two-seat activated carbon adsorption tower to adsorb aged materials and corrosives. However, operating experience has shown that such an adsorption tower is not practical because the adsorption tower is quickly clogged and difficult to clean, and it is difficult to replace the new adsorbent.

3. Recycling and recycling of contaminated cyclobutyl hydrazine solvent: From the circulation system, a small amount of lean butyl hydrazine solvent containing aging materials and corrosive substances is proposed and driven into a vacuum distillation tower. The overhead product is a clean cyclobutyl hydrazine solvent. And return it to the recycling system for reuse. The bottoms of the tower are aged and corrosive and waste, which are discarded after proper treatment. The cleaning method of such a cyclobutyl hydrazine solvent is inefficient because only a small amount of the contaminated cyclobutyl hydrazine solvent is subjected to regeneration treatment. Not only that, but the amount of waste generated is also considerable and very difficult to handle and discard.

4. Use cation and anion ion exchange resins to remove the acid, including sulfonic acids, fatty acids and hydrochloric acid. U.S. Patent No. 5,053,137 to Lal and Bhat utilizes two columns in series to purify and regenerate the cyclobutane solvent containing contaminants. The first column contains a cationic resin and the second column has an anionic resin. Liu and Li pointed out that the acidic substances contained in the aged materials and corrosives can be effectively absorbed by the cationic ion exchange resin to obtain the effect of the purified cyclobutyl hydrazine solvent (Liu Lingchi and Li Dong-sheng, Petrochemical Design, 2002, 19) (2) 31-33), a cationic ion exchange resin containing an acid is regenerated with an aqueous sodium hydroxide solution. In this method, only a small amount of the contaminated cyclobutyl hydrazine solvent is subjected to ion exchange treatment, so the improvement of the quality of the cyclobutyl hydrazine solvent in the system is quite limited. This method is messy and produces a lot of waste.

In order to control the corrosion rate, the acidic substance contained in the solvent can be neutralized with an ammonium such as ammonium glycolamine. However, the aging materials and corrosives remain in the system, circulate in the heat exchanger to reduce the heat transfer coefficient, and block the system to increase the pressure differential of the system. In addition, accumulated aging materials and corrosives are also autocatalyzed to accelerate the aging of the cyclobutyl hydrazine solvent and the corrosion rate of the system, thus forming a vicious circle. Therefore, the system must often exclude significant contaminating solvents to maintain an acceptable level of cyclobutanic solvent quality.

Previous techniques have included the following disadvantages in controlling the corrosive and regenerative circulation systems of cyclohexane solvents:

1. The corrosion rate of the system is high, because the accumulation of aging materials and corrosives accelerates the aging of the cyclobutyl hydrazine solvent, and accelerates the corrosion rate and the accumulation of corrosive substances, resulting in a vicious circle.

2. The accumulation rate of aging and corrosive substances is accelerated by its autocatalysis.

3. The removal or replacement of filters or adsorbents is cumbersome and dangerous.

4. When the quality of the solvent is not maintained at the necessary level, the operation volume and efficiency of the system are reduced, resulting in economic loss.

5. Since only a small amount of contaminated cyclohexane solvent is treated, the regeneration effect of the cyclobutyl hydrazine solvent is insufficient.

6. System operation and maintenance costs are high.

Clearly, the industry is eager to have an efficient, safe and economical way to regenerate contaminated cyclobutyl hydrazine solvent for efficient, safe, high throughput and low operating and maintenance aromatic hydrocarbon extraction systems.

The present invention provides a regenerating apparatus and method for regenerating contaminated cyclobutyl hydrazine solvent on a line to regenerate the cyclobutyl hydrazine solvent in the aromatic hydrocarbon extraction system to maintain its quality at a level of fresh solvent, in particular, the invention uses a novel regeneration Equipment to remove the aging and corrosives contained in the contaminated cyclohexane solvent in the full cycle system to maintain high throughput and high efficiency of the aromatics extraction system.

In accordance with the present invention, a novel solvent regeneration apparatus is installed in the circulation system to remove the aged and corrosive materials contained in the contaminated cyclobutyl sulfonate solvent in the system. The regeneration equipment is preferably placed in the lean loop solvent line and after the cooler and before entering the extraction column. The two regenerative devices use parallel devices to switch at any time to remove accumulated artifacts and corrosives to clean any of the regenerative devices. Specifically, the regeneration apparatus includes a high pressure vessel, a movable cover, and a toroidal frame in the container having a plurality of vertical stainless steel tubes. A magnetic bar is mounted in each of the stainless steel tubes. A filter cylinder is mounted outside the circular frame of the stainless steel tube. When the contaminated cyclobutyl hydrazine solvent flows through the regeneration equipment, the regeneration equipment adsorbs the contaminants contained in the cyclobutyl hydrazine solvent. When the dirt is full, the regeneration equipment is unwound to remove the accumulated dirt.

When the contaminated cyclobutyl hydrazine solvent enters the regeneration equipment, the aged matter and corrosive substances contained therein are adsorbed by the vertical stainless steel tube containing the magnetic rod and separated from the cyclobutyl hydrazine solvent.

The installation of the internal filter cartridge enhances the ability of the magnetic bar to remove aged and corrosive materials. This ability to enhance the removal of aged materials and corrosives is even more important when maintaining the highest level of solvent quality in the ring. After the internal filter cartridge, the regenerated cleaned loop of the solvent is removed from the regeneration equipment and returned to the extraction column for extraction. After a period of operation, for example, two weeks later, the regeneration equipment adsorbs a lot of aged materials and corrosives, and the pressure difference of the regeneration equipment is thus increased. When this pressure difference is increased to a certain extent, for example 2 kg/cm ² , the circulating solvent is cut into the standby regeneration device to continue the operation. Open the regeneration equipment that absorbs many of the aged materials and corrosives, and take out the ring frame and the stainless steel tube and the magnetic rods contained thereon. Place it in another container and remove the magnetic rod from the stainless steel tube. As soon as the magnetic bar is removed, the aged and corrosive substances adhering to the stainless steel pipe are dropped from the stainless steel pipe due to the disappearance of the magnetic force, and the waste is collected in the container. The regenerative equipment is characterized by high efficiency in removing dirt, simple structure, and low operation and maintenance costs.

The purpose and advantages of the present invention are summarized as follows:

1. Low corrosion rate: because it can effectively remove aging and corrosive substances.

2. Low accumulation of aging and corrosives: automatic catalysis due to effective removal of aging materials.

3. No cumbersome, dangerous and expensive system cleaning work or replacement of filters and adsorbents.

4. Stable operation and efficiency: because the solvent in the system can be kept at almost the level of fresh cyclohexane solvent.

5. Highly efficient regenerative contamination of cyclobutane solvent: all contaminated solvents due to renewable systems.

6. Low operating and maintenance costs.

Further objects and advantages will become more apparent from the following description and illustration.

The regenerative apparatus and design of the present invention is based on the unexpected discovery of properties of aged materials and corrosives. It is generally believed that the aged and corrosive substances accumulated in the contaminated cyclohexane solvent are:

1. Acids formed by the oxidation of a solvent such as sulfonic acid and sulfuric acid.

2. An acid from chlorine, such as hydrochloric acid.

3. A polymer derived from the oxidative condensation of a cyclic butyl sulfonate solvent and its aging.

These products are acidic, have a low pH, are black, are sticky and tend to accumulate in pipelines, filters and heat exchangers, resulting in reduced handling and efficiency. These products are difficult to remove from the circulation system and process equipment. Removal of these products and cleaning system equipment from solvent systems is a research topic in the world's petroleum and petrochemical industries.

In the study, we accidentally found that these viscose materials contained very fine, black fine-grained solids. Further physical studies have shown that these products are paramagnetic and easily adsorbed by magnets. Therefore, the contaminants of these cyclobutyl hydrazine solvents can be removed by using a magnet to whiten, clean, and restore the quality and properties of the black cyclobutyl hydrazine solvent. We believe that during operation, the device is corroded by acidic materials to release iron ions. These iron ions are further reacted with sulfuric acid, oxygen and water to form paramagnetic iron sulfide, iron oxide and iron hydroxide particles. It is these particles that turn the cyclobutane solvent into black. These fine paramagnetic particles are further entrapped by organic ageing materials to cause the overall aged and corrosive substances to become paramagnetic. Therefore, the use of magnetic rods can magically remove aged and corrosive substances from contaminated cyclobutyl hydrazine solvent.

In order to achieve the purpose of regenerating the contaminated solvent. The present invention provides an apparatus and method for regenerating contaminated cyclobutyl hydrazine solvent on-line, wherein the method comprises the following steps: 1. Providing a regeneration device, wherein the regeneration device has a high pressure vessel and a movable covering the opening of the high pressure vessel a cover, a plurality of stainless steel tubes housed in the high-pressure vessel, and a magnetic rod installed in the stainless steel tube; 2. the regeneration device is arranged in a circulation line of a solvent-poor solvent; 3. The solvent is introduced into the regeneration device; 4. The solvent flowing out of the regeneration device is recovered and sent to an extraction column installed in the lean loop catalyst solvent circulation line. According to the method, the embodiment comprises: introducing the lean-lean solvent containing contaminants in the system into the regeneration device of the invention to continuously remove the aged materials and corrosive substances to regenerate and maintain the system. The quality of the solvent in the middle ring is about the same as that of the fresh cyclohexane solvent. The above-described reproducing apparatus is a technical focus of the present invention, and the installation and operation of the reproducing apparatus of the present invention are also very important.

Please refer to Figure 1, Figure 2 and Figure 3 for the structure of the regeneration equipment. The regeneration unit 30 is a high pressure vessel 37 comprising a movable lid 36 and resistant to the pressure of the aromatic hydrocarbon extraction system. The regeneration device 30 has an oil inlet 31 and an oil outlet 32. The high pressure vessel 37 is provided with a structure in which at least one ring frame 33, 34, 35, a plurality of stainless steel pipes 40, a plurality of magnetic bars 60, and a screen cylinder 80 are disposed. The movable cover 36 covers an opening of the high pressure container 37, and the plurality of stainless steel tubes 40 are fixed on the circular frame 33, 34, 35, and a magnetic bar 60 is mounted in each stainless steel tube 40. The ring frames 33, 34, 35 in the high pressure container 37 are installed in the center of the screen cylinder 80. The mesh of the filter cylinder 80 may be between 1 and 200, preferably between 10 and 100. In the preferred embodiment shown in the figures, the circular frames 33, 34, 35 are attached with 12 vertical stainless steel tubes 40. As for the number of stainless steel tubes 40, there may be 2 to 30, or more. A magnetic bar 60 is mounted in each of the stainless steel tubes 40. The lean butyl sulfonate solvent 22 is directed from the oil feed inlet 31 to the regeneration unit 30 and flows down through the stainless steel tube 40 containing the magnetic rod 60 and finally out through the bottom oil outlet 32. The filter cartridge 80 in the regeneration device 30 is used to prevent short circuiting when the lean butyl solvent 22 is circulated to the regeneration device 30. If there is no filter cartridge 80, the main flow state of the poor butyl sulfonate solvent 22 It will flow through the regeneration equipment 30 at the shortest and fastest distance, so that all the surfaces of the whole magnetic rod 60 can not achieve the adsorption effect (that is, some places have a fast flow rate, some places are very slow, if there is a filter screen) , the flow rate from the filter hole will be more average).

Please refer to FIG. 4 again. FIG. 4 is an aromatic hydrocarbon extraction system to which the above-described regeneration device 30 is applied, and illustrates the flow of extraction. An aromatic hydrocarbon light oil 11 is introduced into an extraction tower 10. The lean butyl sulfonate solvent 22 is introduced into the extraction column 10 from the top, and a raffinate oil 13 is taken from the top of the column. An extraction oil 12 is taken from the bottom of the column and sent to the fractionation column 20 to distill off the aromatic hydrocarbon product oil 21, and the remaining solvent of the fractionation column 20 is a cyclopentane solvent 22. The recovered lean butyl sulfonate solvent 22 is returned to the extraction column 10 for reuse. Prior to the recovery of the extraction column 10, the lean butyl sulfonate solvent 22 is cooled by a heat exchanger 23 and then treated by the regeneration unit 30. The heat exchanger 23 can be liquid cooled or air cooled.

It is important for the regeneration of the contaminated lean sulfonium solvent 22 to promote efficient and high efficiency of the regeneration equipment 30. In order to achieve this, we have found that the best way is to treat the entire strand of contaminated LeCrust solvent 22, rather than just a small split. Therefore, the regeneration apparatus 30 is to be installed on the circulation system to treat the lean-lean solvent 22 in the entire cycle.

In order to make the regeneration operation truly continuous, when the system performs the regeneration process, the two regeneration devices 30a and 30b can be simultaneously mounted in parallel on the circulation line (as shown in FIG. 4) so that when one regeneration device 30a is operated, the other The spare regeneration device 30b can be used to clean the spare. When the operation time of the regenerating apparatus 30a or 30b is increased, the aged matter and the corrosive material continue to be adsorbed and accumulated on the stainless steel tube 40 containing the magnetic bar 60. The pressure difference of the regeneration device 30 will thus continue to increase. When this pressure difference is increased to some extent, the regeneration device 30 is disassembled for cleaning. In order to increase the efficiency of the entire system, a cleaning step is performed when the operating pressure drop of the regenerating apparatus 30 is increased to 1 to 5 kg/cm 2 , and the cleaning period of the regenerating apparatus 30 is about 2 according to the degree of cleaning of the cyclohexane solvent system. Up to 30 days or longer.

When the regenerating apparatus 30a is to be cleaned, the lean butyl sulfonate solvent 22 is transferred to the regenerating apparatus 30b to continuously regenerate the operation of the lean butyl sulfonate solvent 22. When cleaning the regeneration device 30a, the movable cover 36 shown in Fig. 1 is first opened, and then the ring shown in Fig. 2 is opened. The shelves 33, 34, 35 together with the stainless steel tube 40 and the contained magnetic bar 60 are removed from the regeneration device 30a. At this time, the space between the surface of the stainless steel pipe 40 and the stainless steel pipe 40 is filled with aged materials and corrosives. When the magnetic bar 60 is removed, the aged matter and the corrosive material adhering to the surface of the stainless steel pipe 40 are dropped by gravity. After cleaning, the magnetic bar 60 is placed back into the stainless steel tube 40, and the ring frames 33, 34, 35 are loaded into the regeneration device 30a for reuse.

The regeneration device 30 can be used at the operating temperature of the extraction system. However, too high a temperature will cause the magnetic rod 60 to lose its magnetic properties, and the viscosity of the aged material and the corrosive substance will increase at a too low temperature to lose its adhesion to the stainless steel tube 40 and the performance of the regenerating apparatus 30. Therefore, a feasible operating temperature range is 10 to 200 ° C, and 20 to 150 ° C is most suitable. After considering this optimum temperature range, we believe that the regeneration unit 30 is preferably installed on the recycle line of the lean loop solvent 22 between the heat exchanger 23 and the extraction column 10.

To make the operation effective, the spatial flow rate (based on the volume of the regeneration device 30) flowing through the regeneration device 30 ranges from 100 to 10,000 v/v/Hr, and is preferably 50 to 5,000 v/v/Hr.

The pressure difference of the regeneration device 30 is an indicator of its cleanliness and remaining operating capacity. When this pressure difference is increased to 2 kg/cm ² or higher, the regeneration apparatus 30 is cleaned in accordance with the above steps to restore its operational capacity.

The above is the description made with the drawing, and the actual measured data is as follows.

Example of actual measurement: Two tests were constructed to verify the effectiveness of the invention. It measures 33 cm in diameter, 65 cm in height and 55 liters in volume. A stainless steel tube is placed on the steel frame, and a total of 12 magnetic rods are placed. The mesh of the filter cylinder is 80 mesh, and the two regeneration equipment is installed on the circulation line of the lean-butane solvent between the cooler and the inlet of the extraction tower.

The second regeneration equipment was tested at the refinery's aromatics extraction system. The extraction system has been in operation for 3 years, so the solvent is poor, black, corrosive and contains a lot of adhesive ageing and corrosion. Things. The size of the extraction column is 3,600 mm in inner diameter and 42,000 mm in height. The feed medium oil flow rate was 42,531 kg/hr (i.e., 53.1 m3/hr). The flow rate of the contaminated lean butyl hydrazine solvent circulation system was 138,602 kg/hr (107 m3/hr). Therefore, the volume ratio of solvent to feed is about 2. The regeneration equipment is operated until the pressure drop rises to 2 kg/cm 2 and is cleaned. At the beginning of the test, since the original cyclohexane solvent was too dirty, the regeneration equipment could only be operated for one week and stopped because the pressure drop reached 2 kg/cm 2 for cleaning. The cyclobutane solvent in the system is getting cleaner as the test time increases, so the operating cycle of the regeneration equipment has increased from one week to two weeks, three weeks, four weeks or even three months. When the tested regenerative equipment is opened for cleaning, the surface of the stainless steel tube and the space between it are filled with black and sticky aged and corrosive materials. When the magnetic bar is removed from the stainless steel tube, the aged objects and corrosives fall off.

The advantages of the regenerative apparatus of the present invention can be demonstrated by analyzing the characteristics of the cyclobutanol solvent before and after the test. The methods for analyzing these characteristics are:

1. Residue of cyclobutanol solvent to 290 ° C. Since the boiling point of the cyclobutyl hydrazine solvent is 285 ° C, the residual amount distilled to 290 ° C represents the amount of the aged product and the corrosive substance contained therein, that is, the smaller the residual amount, the cleaner the cyclobutyl hydrazine solvent.

2. The color of the solvent of the poor butyl sulfonate: Because the color of the aging product and the corrosive substance itself is very dark, the lighter the color of the butyl sulfonate solvent, the cleaner it is.

3. The rate of addition of ammonium (MEA): Since the acidity is due to the aging of the cyclobutanol solvent, the less the amount of ammonium used to neutralize the acid, the smaller the ring. The cleaner the solvent, the cleaner.

4. Replenishing amount of cyclobutyl hydrazine solvent: Since the cyclobutyl hydrazine solvent gradually ages in the extraction column, it is necessary to discard the cyclobutyl hydrazine solvent in the circulation system and replenish fresh cyclobutyl hydrazine solvent to ensure The quality of the cyclobutyl hydrazine solvent. Therefore, the less the amount of cyclobutyrate solvent replenished, the cleaner the cyclobutyrene solvent in the system.

The test results are listed in Table 1: The distillation residue according to the ASTM86 method was 1.0 and 0.4% in each of the samples before and after the regeneration three months later. We noticed that the extraction system before regeneration was very dirty and loaded with a large amount of aging and corrosive substances. The sample taken does not necessarily contain all of the aged and corrosive materials. Therefore, the distillation residue of the sample before regeneration may be much higher than 1% shown in Table 1. The sample regenerated after three months is surprisingly clean, and the distillation residue is only 0.4%.

The above results show that the regenerating apparatus of the present invention is very effective for regenerating contaminated cyclobutyl hydrazine solvent.

Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. The foregoing cleaning step is used interchangeably in two parallel regenerative devices, but may be regenerated in a system using a single regenerative device. Equipment extraction The cleaning step is carried out, but in order to take into account the continuity of the system operation, the regeneration equipment for the equipment is preferred. Any modification and refinement made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be included in the present invention. Therefore, the scope of the present invention is defined by the scope of the appended claims. Prevail.

In summary, the present invention enhances the above-mentioned effects in comparison with the conventional creations, and should fully comply with the novelty and progressive statutory innovation patent requirements, and submit an application according to law, and invites you to approve the invention patent application to encourage creation. Feeling the virtues.

10‧‧‧ Extraction tower

11‧‧‧Aromatic hydrocarbon light oil

12‧‧‧Extractive oil

13‧‧‧ raffinate oil

20‧‧‧ fractionation tower

21‧‧‧Aromatic hydrocarbon product oil

22‧‧‧Poor cyclohexane solvent

23‧‧‧ heat exchanger

30‧‧‧Recycling equipment

31‧‧‧ Oil inlet

32‧‧‧Oil exports

33, 34, 35‧‧‧ ring rack

36‧‧‧Removable cover

37‧‧‧High pressure container

40‧‧‧Stainless steel tube

60‧‧‧Magnetic rod

80‧‧‧Filter cylinder

30a, 30b‧‧‧Recycling equipment

Figure 1 is a schematic cross-sectional view showing a preferred embodiment of the reproducing apparatus of the present invention.

Figure 2 is an exploded view of the main components of the regenerative apparatus.

Figure 3 is a cross-sectional view of the reproducing apparatus A-A.

4 is a block diagram of an extraction system including the regeneration apparatus.

30‧‧‧Recycling equipment

31‧‧‧ Oil inlet

32‧‧‧Oil exports

33, 34, 35‧‧‧ ring rack

36‧‧‧Removable cover

37‧‧‧High pressure container

40‧‧‧Stainless steel tube

60‧‧‧Magnetic rod

80‧‧‧Filter cylinder

Claims (35)

An apparatus for regenerating contaminated cyclobutyl hydrazine solvent on-line comprises: a high pressure vessel having a movable cover; at least one ring frame mounted on the high pressure vessel, having a plurality of stainless steel pipes thereon, a magnetic rod is arranged in each of the stainless steel tubes; a filter cylinder is installed in the center of the high pressure container via a circular frame in the high pressure container, and the filter cylinder surrounds and surrounds the lower portions of the stainless steel tubes a portion of an oil inlet and an oil outlet disposed on each side of the high pressure vessel, wherein the oil inlet is located above a top edge of the screen cylinder, the oil outlet is located below a top edge of the screen cylinder, and the filter cylinder Between the lower portion of the stainless steel tube and the oil outlet, the lean butyl hydrazine solvent enters the high pressure container from the oil inlet, directly contacts the stainless steel tubes containing the magnetic rods, and flows downwards The stainless steel tubes flow out through the filter holes of the filter cylinder to the oil outlet. The apparatus for recycling a regenerated contaminated cyclobutyl hydrazine solvent according to the first aspect of the invention, wherein the number of the stainless steel tubes and the magnetic rod is between 2 and 30. The apparatus for recycling a regenerated contaminated cyclobutyl hydrazine solvent according to the first aspect of the invention, wherein the filter cartridge has a pore size of between 1 and 200. The apparatus for recycling a regenerated contaminated cyclobutyl hydrazine solvent according to claim 3, wherein the filter cartridge has a pore size of between 10 and 100. A method for regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system comprises the steps of: (a) constructing a closed lean butyl hydrazine solvent circulation line comprising at least one extraction column and one fractionation column, one of which contains An aromatic hydrocarbon light oil of an aromatic hydrocarbon component and an aromatic hydrocarbon component is introduced into one of the first positions of the extraction column, and a lean cyclohexane solvent containing a cyclobutylene component is introduced into a second position of the extraction column to borrow Producing a raffinate oil containing the non-aromatic hydrocarbon component and containing the aromatic hydrocarbon component from the extraction tower And the extracting oil of the cyclodextrin component, and the extracting oil is introduced into the fractionating column to generate an aromatic hydrocarbon product oil and a polluting deuterium sulfonate solvent by the fractionating tower, and the polluted deuterium The paramagnetic particles are generated in the solvent by the release of iron ions, and the paramagnetic particles are surrounded by the aged material and the corrosive material, so that the aged product and the corrosive substance become paramagnetic; (b) providing an oily material a high pressure vessel at the inlet and the oil outlet is disposed in the closed lean loop solvent loop, wherein the high pressure vessel is provided with a plurality of magnetic rods for the aged material to be paramagnetic and the corrosion is contaminated by the corrosion (c) maintaining the contaminated deuterium sulfonate solvent at an operating temperature, and the contaminated deuterium sulfonate solvent has the aging product and the corrosive substance; (d) The contaminated lean butyl hydrazine solvent is introduced into the high pressure vessel through the oil inlet, such that the aging material and the corrosion product are adsorbed and adhered to the magnetic rods; and (e) the regeneration of the oil outlet is recovered and a clean ring of butyl sulfonate solvent, Sulfolane as its sulfone lean solvent is fed to the extraction column. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 5, wherein in the step (c), the operating temperature ranges from 10 ° C to 200 ° C. The method for regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system according to claim 5, wherein in the step (b), the method comprises: using a solvent regeneration device, comprising: the high pressure container having one a movable cover; at least one ring frame mounted on the high-pressure container, having a plurality of stainless steel pipes, the magnetic bar being installed in each of the stainless steel pipes; and a filter cylinder passing through the ring in the high-pressure container The rack is installed in the center of the filter cylinder, and surrounds and surrounds a part of the stainless steel tubes; the oil inlet is used to guide the contaminated lean butyl solvent to the oil inlet Into the high-pressure vessel, the contaminated cyclohexane solvent is directly contacted with the stainless steel tubes containing the magnetic rods without passing through the filter cylinder; and the oil outlet, wherein the filter cylinder is interposed between the stainless steel tubes Between the tube and the oil outlet, the obtained clean ring butyl hydrazine solvent flows out of the high pressure container through the filter mesh hole of the filter cylinder and the oil outlet. A method for regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 7, wherein each of the magnetic rods is removed from the stainless steel tube to cause an aged material attached to the stainless steel and the corrosive material Dropped from the stainless steel tube. A method for regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 5, wherein in step (b), a method for using the aging product and the corrosive material to be contaminated by the contamination is included A system for removing cyclodextrin solvent, comprising: the high pressure vessel having a movable lid and an inner region through which the contaminated lean butyl sulfonate solvent is introduced into the inner region and through the oil outlet The clean ring butyl hydrazine solvent is removed from the inner region; a plurality of stainless steel tubes are disposed in the inner space, and the magnetic rod is disposed in each of the stainless steel tubes; and a screen cylinder is interposed between the stainless steel tube and the oil outlet, wherein The contaminated deuterium sulfonate solvent is directly in contact with the stainless steel tubes containing the magnetic rods, and the stainless steel tubes adsorb the aged material and the corrosive material, so that the aged product and the corrosive substance adhere to the stainless steel tube Obtaining the clean loop butyl hydrazine solvent through the filter mesh hole of the filter cylinder and the oil outlet, wherein each of the magnetic rods can be taken out from the stainless steel tube, so that the aged material attached to the stainless steel and The corrosive material falls from the stainless steel tube. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 9, wherein the filter cylinder surrounds a portion of the stainless steel tubes. The method for regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system according to claim 10, wherein the filter cartridge comprises a hollow interior, wherein the stainless steel conduits are fixed to a circular frame, and the The ring frame is located above the top edge of the filter cylinder. The lower portion of the stainless steel tubes is positioned inside the hollow interior. The method for regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system according to claim 5, wherein the cyclobutyl hydrazine solvent is circulated in the closed lean butyl hydrazine solvent circulation line, and a fresh ring is added according to the demand. The hydrazine solvent is in the lean loop butyl hydrazine solvent circulation line. A method for regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 5, wherein the contaminated cyclamate solvent is cooled prior to being introduced into the high pressure vessel via the oil inlet. Lean ring butyl sulfonate solvent. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 5, wherein the number of the stainless steel tubes is between 2 and 30. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 7, wherein the filter cartridge has a pore size of between 1 and 200. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 15 wherein the filter cartridge has a pore size of between 10 and 200. The method for regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system according to claim 7, wherein the stainless steel tubes are longitudinally disposed and divided into an upper portion and a lower portion, wherein the stainless steel tubes The lower section is surrounded by the screen cylinder, and the upper section of the stainless steel tubes is not surrounded by the screen cylinder. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 17, wherein the oil feed inlet is located above the high pressure vessel and the oil outlet is located below the high pressure vessel. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 9 wherein the number of the stainless steel tubes and the magnetic rod is between 2 and 30. Regenerating contaminated cyclobutyl hydrazine in an extraction system as described in claim 9 The method of the agent, wherein the filter cylinder encloses a portion of the stainless steel tubes. The method for regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system according to claim 20, wherein the filter cartridge comprises a hollow interior, wherein the stainless steel conduits are fixed to a circular frame, and the The ring frame is located above the top edge of the screen cylinder such that the lower portion of the stainless steel tubes is located inside the hollow. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 21, wherein the top edge of the filter cylinder is placed for the torus. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 22, wherein the sieve cylinder is cylindrical. A method of regenerating a contaminated cyclobutyl hydrazine solvent in an extraction system as described in claim 23, wherein the ring frame has a circular periphery. A method for removing organic contaminants from a contaminated solvent containing acid and acid by-products, wherein the contaminating solvent flows through a system, and the system includes a device for contacting the contaminating solvent, the method comprising the steps of: (a) contacting the acid and acid by-products in the contaminating solvent containing organic contaminants with the apparatus such that the apparatus releases iron ions in the contaminating solvent, resulting in corrosive corrosive substances in the contaminating solvent; (b) Maintaining the contaminating solvent in a state such that the paramagnetic corrosive material is plugged with the organic contaminant; and (c) contacting the contaminating solvent with a magnet to adsorb from the contaminating solvent by the magnet And removing the organic contaminant plugged with the paramagnetic corrosive material to obtain a clean solvent. A method of removing organic contaminants from a contaminated solvent containing acid and acid by-products as described in claim 25, wherein the organic contaminant comprises an organic aged product. A contaminating solvent from an acid-containing and acid by-product as described in claim 25 A method of removing organic contaminants, wherein the iron ions react with sulfur, oxygen, and/or water to produce paramagnetic particles. A method of removing organic contaminants from a contaminated solvent containing acid and acid by-products as described in claim 27, wherein the paramagnetic particles are selected from the group consisting of iron sulfide, iron oxide, and iron hydroxide, and combinations thereof. A method of removing organic contaminants from a contaminated solvent containing acid and acid by-products as described in claim 25, wherein the contaminating solvent comprises an organic solvent. A method for removing organic contaminants from a contaminated solvent containing acid and acid by-products as described in claim 25, wherein in step (c), a solvent regeneration apparatus comprising: a high pressure vessel is used The utility model has a movable cover; at least one ring frame mounted on the high-pressure container, wherein a plurality of stainless steel pipes are arranged, a magnetic bar is arranged in each of the stainless steel pipes; and a filter cylinder is passed through the high-pressure container a ring frame is installed in the center of the filter cylinder, the filter cylinder surrounds and covers a part of the stainless steel pipes; an oil inlet to introduce the polluting solvent into the high pressure container via the oil inlet, so that The contaminating solvent does not need to pass through the filter cylinder to directly contact the stainless steel tubes containing the magnetic rods; and an oil outlet, wherein the filter cylinder is interposed between the stainless steel tube and the oil outlet, so that the obtained The clean solvent flows out of the high pressure vessel through the filter mesh of the filter cartridge and the oil outlet. A method for removing organic contaminants from a contaminated solvent containing acid and acid by-products as described in claim 30, wherein each of the magnetic rods is removed from the stainless steel tube so as to be attached to the stainless steel tube The organic contaminant and the corrosive material are dropped from the stainless steel tube. A method for removing organic contaminants from a contaminated solvent containing acid and acid by-products as described in claim 25, wherein in step (c), a device is used To remove the organic contaminant from the contaminating solvent, the apparatus comprises: a container having a movable cover and an inner region, the contaminating solvent is introduced into the inner region via an oil inlet, and the oil is discharged via an oil outlet a clean solvent leaves the inner region; a plurality of stainless steel tubes are disposed in the inner space, and each of the stainless steel tubes is provided with a magnetic rod; and a filter cylinder is interposed between the stainless steel tube and the oil outlet, wherein the contaminated solvent is directly Contacting the stainless steel tubes with the magnetic rods, the stainless steel tubes adsorbing the aged material and the corrosive material, and adhering the organic pollutants and the corrosive substances to the stainless steel tube to obtain the clean solvent. The filter mesh of the filter cartridge and the oil outlet exit, wherein each of the magnetic rods can be taken out of the stainless steel tube, so that the organic contaminant attached to the stainless steel tube and the corrosive material fall from the stainless steel tube. A method of removing organic contaminants from a contaminated solvent containing acid and acid by-products as described in claim 32, wherein the screen cylinder encloses a portion of the stainless steel tubes. A method for removing organic contaminants from a contaminated solvent containing acid and acid by-products as described in claim 33, wherein the filter cartridge comprises a hollow interior, wherein the stainless steel conduits are fixed to a ring And the circular frame is located above the top edge of the filter cylinder such that the lower portion of the stainless steel tubes is located inside the hollow. A method of removing polymeric contaminants from an organic solvent circuit, wherein the organic solvent circuit comprises a treatment device that is subject to corrosion by acid and acid by-products, the method comprising the steps of: (a) passing an organic solvent through the processing device such that An acid and an acid by-product in the organic solvent contact the processing apparatus, and the processing apparatus releases paramagnetic iron ions in the organic solvent, thereby causing the iron ion to react with sulfur, oxygen, and/or water in the organic solvent to generate Paramagnetically corroding the particles; (b) maintaining the solvent in a state such that the paramagnetic corrosive particles are plugged together with the polymeric contaminants in the organic solvent, and the organic solvent is produced in the organic solvent a magnetic polymeric contaminant; and (c) providing one or more magnets in the organic solvent circuit such that the paramagnetic polymeric contaminant is adsorbed by the magnet and attached to the magnet, thereby removing the organic solvent A paramagnetic polymeric contaminant.