2-ethyl anthraquinone crude product rectification vacuum system

Abstract

The utility model discloses a 2-ethyl anthraquinone crude product rectification vacuum system, which comprises a screw vacuum pump, an air inlet and an air outlet are arranged on the screw vacuum pump, and a lubricating cavity is arranged in the screw vacuum pump; the output end of the dust remover communicates with the air inlet; the input end of the oil filter communicates with the oil outlet end of the lubricating cavity; the input end of the filtering oil storage tank communicates with the output end of the oil filter, and the output end communicates with the oil inlet end of the lubricating cavity; the air inlet end of the condenser communicates with the oil gas output end of the lubricating cavity, and the output end of the condenser communicates with the oil inlet end of the lubricating cavity and the input end of the filtering oil storage tank. In the operation process of the screw vacuum pump, after lubricating oil in the lubricating cavity is vaporized due to high temperature, vaporized oil can enter the condenser and is condensed to be recycled, and condensed oil can be directly sent back into the lubricating cavity, so that the situation that the lubricating effect is affected due to the fact that the internal lubricating oil is reduced too much is prevented, and the service life of the screw vacuum pump is prolonged. Or the vaporized oil can be conveyed into the filtering oil storage tank for recycling, so that the vaporized oil can be effectively recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum production equipment, in particular to a 2-ethylanthraquinone crude product distillation vacuum system. Background Art

[0002] In the production process of 2-ethylanthraquinone, the crude product distillation needs to be completed under high vacuum. At present, the sliding valve vacuum pump is generally used for vacuum treatment. Each time a kettle of material is distilled, the vacuum pump oil needs to be replaced two to three times, and the oil change amount is about 30 liters each time. Each shift needs to re-distill a kettle of vacuum pump oil to ensure that the vacuum pump oil on duty can be used normally, and new oil needs to be replaced and replenished once every quarter. Over time, it wastes materials and consumes labor. The prior art with patent number CN208917100U discloses a vacuum system for purifying 2-ethylanthraquinone crude products, which uses an external oil tank and a vacuum oil filter to form a set of circulating purification devices, so that the contaminated vacuum pump oil is separated by partitions, filtered by filters, vacuum dehydrated, and filtered by pressure to remove impurities, and the water and impurities therein are removed, which effectively improves the quality of vacuum pump oil and extends the service life of vacuum pumps and vacuum pump oil. However, in addition to daily oil cleaning and oil changing operations, part of the lubricating oil will be vaporized due to the increase in internal temperature of the vacuum pump during operation, affecting the sealing inside the pump body. Direct discharge will pollute the environment, resulting in a decrease in the amount of lubricating oil inside the vacuum pump, affecting the lubrication effect and the service life of the vacuum pump. Summary of the invention

[0003] The utility model aims to solve at least one of the above-mentioned technical problems and provides a 2-ethylanthraquinone crude product distillation vacuum system, which can effectively recycle vaporized lubricating oil and filter and purify the lubricating oil.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A 2-ethylanthraquinone crude product distillation vacuum system comprises a screw vacuum pump, which is provided with an air inlet and an air outlet, wherein a lubrication chamber is arranged inside the screw vacuum pump; a dust collector, whose output end is connected to the air inlet; an oil filter, whose input end is connected to the oil outlet of the lubrication chamber; a filter oil storage tank, whose input end is connected to the output end of the oil filter, and whose output end is connected to the oil inlet of the lubrication chamber; and a condenser, whose air inlet end is connected to the oil and gas output end of the lubrication chamber, and whose output end is connected to both the oil inlet of the lubrication chamber and the input end of the filter oil storage tank.

[0006] As an improvement of the above technical solution, the screw vacuum pump includes a pump body and a motor, and two groups of screws that can mesh with each other and rotate in opposite directions are installed in the pump body. The air inlet and the air outlet are both arranged on the pump body. The driving end of the motor is connected to one group of the screws through a transmission chassis, and the lubrication chamber is arranged in the transmission chassis.

[0007] As an improvement of the above technical solution, the transmission chassis is provided with an oil inlet, an oil outlet and an oil and gas outlet, all of which are connected to the lubrication chamber. The oil inlet is connected to the output end of the condenser and the output end of the filter oil storage tank. The oil outlet is connected to the input end of the oil filter, and the oil and gas outlet is connected to the air inlet end of the condenser.

[0008] As an improvement of the above technical solution, the condenser is connected with an oil and gas input pipe and a condensing oil output pipe, and an oil guide cavity inclined toward one side of the condensing oil output pipe is provided on the bottom of the condenser.

[0009] As an improvement of the above technical solution, a waste gas discharge port is provided on the top of the condenser.

[0010] As an improvement of the above technical solution, the filter oil storage tank is provided with a condensed oil recovery pipe, a filter oil input pipe and an oil outlet pipe, the condensed oil recovery pipe is connected to the condensed oil output pipe, the filter oil input pipe is connected to the output end of the oil filter, and the oil outlet pipe is connected to the oil inlet.

[0011] As an improvement of the above technical solution, a condensed oil filter tank is provided inside the filter oil storage tank, and the condensed oil recovery pipe is connected to the condensed oil filter tank.

[0012] As an improvement of the above technical solution, an oil replenishing port is provided on the filter oil storage tank.

[0013] Compared with the prior art, the beneficial effects of this application are:

[0014] The utility model discloses a 2-ethylanthraquinone crude product distillation vacuum system, which uses a screw vacuum pump instead of a traditional sliding valve vacuum pump, and can reduce the oil consumption in the production process; and during the operation of the screw vacuum pump, after the lubricating oil in the lubricating cavity is vaporized due to high temperature, the vaporized oil can also enter the condenser, and is recovered after condensation. The condensed oil can be directly returned to the lubricating cavity to prevent the internal lubricating oil from being reduced too much and affecting the lubrication effect, or it can be transported to the filter oil storage tank for reuse, which can effectively recycle the vaporized oil and prevent it from affecting the internal air pressure and causing oil leakage. In addition, the oil filter can also filter and clean the oil in the lubricating cavity to increase the service life of the vacuum pump oil and reduce the labor of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2This is a schematic diagram of the structure of the filter oil storage tank and the condenser in the embodiment of the utility model;

[0018] Figure 3 It is a partial cross-sectional view of a screw vacuum pump in an embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the condenser in the embodiment of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the filter oil storage tank in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is referred to as being "set in the middle", it does not only mean being set in the middle, as long as it is not set at both ends within the range defined by the middle. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] like Figures 1 to 5As shown, the utility model provides a 2-ethylanthraquinone crude product distillation vacuum system, including a screw vacuum pump 100, which is provided with an air inlet 110 and an air outlet 120, and a lubrication chamber 130 is provided in the screw vacuum pump 100; a dust collector 200, whose output end is connected to the air inlet 110; an oil filter 300, whose input end is connected to the oil outlet of the lubrication chamber 130; a filter oil storage tank 400, whose input end is connected to the output end of the oil filter 300, and the output end is connected to the oil inlet end of the lubrication chamber 130; a condenser 500, whose air inlet end is connected to the oil and gas output end of the lubrication chamber 130, and the output end is connected to the oil inlet end of the lubrication chamber 130 and the input end of the filter oil storage tank 400. The dust collector 100 can be an existing bag dust collector to clean the gas at the air inlet end, prevent impurities from entering the interior of the screw vacuum pump 100, and extend the life of the vacuum pump; the oil filter 300 can be an existing vacuum oil filter, which can clean and filter the lubricating oil in the lubrication cavity 130 after a period of time. Of course, new oil still needs to be replaced after long-term use. All devices are connected through pipelines. In order to facilitate the control of the connection status of the pipelines, control valves are provided on all pipelines.

[0025] See also Figure 3 In the specific implementation of the present application, the screw vacuum pump 100 includes a pump body 140 and a motor 150. Two groups of screws 141 that can mesh with each other and rotate in opposite directions are installed in the pump body 140. The air inlet 110 and the air outlet 120 are both arranged on the pump body 140. The driving end of the motor 150 is connected to one of the groups of screws 141 through a transmission case 160. The lubrication chamber 130 is arranged in the transmission case 160. Among them, the rotation directions of the two groups of screws 141 are opposite, and the group connected to the driving end of the motor 150 is the active screw, and the other group is the driven screw; the transmission case 160 includes transmission gears and bearings, etc., and the specific structure of the existing screw vacuum pump can be referred to, and the present application will not be described in detail; the bearings and transmission gears are located in the lubrication chamber 130, and are lubricated by lubricating oil, which can ensure the stability of the rotation of the screw 141; of course, in order to reduce the high-temperature vaporization of the lubricating oil, a cooling system can also be arranged in the lubrication chamber 130, which is a prior art.

[0026] Specifically, the transmission case 160 is provided with an oil inlet 161, an oil outlet 162 and an oil and gas outlet 163, all of which are connected to the lubrication chamber 130. The oil inlet 161 is connected to the output end of the condenser 500 and the output end of the filter oil storage tank 400. The oil outlet 162 is connected to the input end of the oil filter 300. The oil and gas outlet 163 is connected to the air inlet end of the condenser 500. A one-way air outlet valve may be provided in the oil and gas outlet 163.

[0027] See also Figure 2 and Figure 4In the specific embodiment of the present application, the condenser 500 is connected with an oil and gas input pipe 510 and a condensed oil output pipe 520, and an oil guide cavity 530 inclined to one side of the condensed oil output pipe 520 is provided on the bottom of the condenser 500. The condenser 500 is also connected with a condensed water inlet pipe and a condensed water outlet pipe; after the oil and gas enter the condenser 500, it can be liquefied at low temperature, and the liquefied oil can be collected along the oil guide cavity 530 and discharged from the condensed oil output pipe 520; this part of the lubricating oil can be directly returned to the lubricating cavity 130, or returned to the filter oil storage tank 400. Further, the top of the condenser 500 is provided with an exhaust gas discharge port 540 to discharge the condensed exhaust gas.

[0028] See also Figure 2 and Figure 5 In the specific embodiment of the present application, the filter oil storage tank 400 is provided with a condensed oil recovery pipe 410, a filter oil input pipe 420 and an oil outlet pipe 430. The condensed oil recovery pipe 410 is connected to the condensed oil output pipe 520, the filter oil input pipe 420 is connected to the output end of the oil filter 300, and the oil outlet pipe 430 is connected to the oil inlet 161. Further, a condensed oil filter tank 440 is provided inside the filter oil storage tank 400, and the condensed oil recovery pipe 410 is connected to the condensed oil filter tank 440, so that the condensed vaporized oil passes through the condensed oil filter tank 440 and then enters the filter oil storage tank 400 to clean the condensed oil. In addition, the filter oil storage tank 400 is provided with an oil replenishment port 450 to replenish the lubricating oil when the lubricating oil inside the filter oil storage tank 400 and the lubricating cavity 130 is insufficient.

[0029] The utility model discloses a 2-ethylanthraquinone crude product distillation vacuum system, which uses a screw vacuum pump 100 to replace the traditional sliding valve vacuum pump, and can reduce the oil consumption in the production process; and during the operation of the screw vacuum pump 100, after the lubricating oil in the lubricating chamber 130 is vaporized due to high temperature, the vaporized oil can also enter the condenser 500, and is recovered after condensation. The condensed oil can be directly returned to the lubricating chamber 130 to prevent the internal lubricating oil from being reduced too much and affecting the lubrication effect, or transported to the filter oil storage tank 400 for reuse, which can effectively recycle the vaporized oil and prevent it from affecting the internal air pressure and causing oil leakage. In addition, the oil filter 300 can also filter and clean the oil in the lubricating chamber 130 to increase the service life of the vacuum pump oil and reduce the labor of personnel.

[0030] The above embodiments are only used to illustrate the technical solution of the utility model but not to limit it. Any modification or equivalent substitution that does not deviate from the spirit and scope of the utility model shall be included in the scope of the technical solution of the utility model.

Claims

1. A 2-ethylanthraquinone crude product distillation vacuum system, characterized in that: include A screw vacuum pump, which is provided with an air inlet and an air outlet, and a lubrication chamber is provided in the screw vacuum pump; A dust collector, the output end of which is connected to the air inlet; An oil filter, the input end of which is connected to the oil outlet end of the lubrication chamber; The filter oil storage tank has an input end connected to the output end of the oil filter, and the output end is connected to the oil inlet end of the lubrication chamber; the condenser has an air inlet end connected to the oil and gas output end of the lubrication chamber, and the output end is connected to the oil inlet end of the lubrication chamber and the input end of the filter oil storage tank.

2. A 2-ethylanthraquinone crude product distillation vacuum system according to claim 1, characterized in that: The screw vacuum pump includes a pump body and a motor. Two groups of screws that can mesh with each other and rotate in opposite directions are installed in the pump body. The air inlet and the air outlet are both arranged on the pump body. The driving end of the motor is connected to one group of the screws through a transmission chassis, and the lubrication chamber is arranged in the transmission chassis.

3. A 2-ethylanthraquinone crude product distillation vacuum system according to claim 2, characterized in that: The transmission case is provided with an oil inlet, an oil outlet and an oil and gas outlet all connected to the lubrication cavity. The oil inlet is connected to the output end of the condenser and the output end of the filter oil storage tank. The oil outlet is connected to the input end of the oil filter. The oil and gas outlet is connected to the air inlet end of the condenser.

4. A 2-ethylanthraquinone crude product distillation vacuum system according to claim 3, characterized in that: The condenser is connected with an oil and gas input pipe and a condensing oil output pipe, and the bottom of the condenser is provided with an oil guide cavity inclined toward one side of the condensing oil output pipe.

5. A 2-ethylanthraquinone crude product distillation vacuum system according to claim 4, characterized in that: A waste gas discharge port is arranged on the top of the condenser.

6. A 2-ethylanthraquinone crude product distillation vacuum system according to claim 4, characterized in that: The filter oil storage tank is provided with a condensed oil recovery pipe, a filter oil input pipe and an oil outlet pipe, the condensed oil recovery pipe is connected to the condensed oil output pipe, the filter oil input pipe is connected to the output end of the oil filter, and the oil outlet pipe is connected to the oil inlet.

7. A 2-ethylanthraquinone crude product distillation vacuum system according to claim 6, characterized in that: A condensed oil filter tank is provided inside the filter oil storage tank, and the condensed oil recovery pipe is connected to the condensed oil filter tank.

8. A 2-ethylanthraquinone crude product distillation vacuum system according to claim 7, characterized in that: An oil replenishing port is provided on the filtering oil storage tank.

Images