Vacuum unit inlet wax oil removing cold hydrazine

Abstract

The utility model discloses a vacuum unit inlet wax oil removing cold trap which comprises a cold trap body, the cold trap body is fixed to the ground through a support, a first connecting pipe and a second connecting pipe which are communicated with the interior of the cold trap body are arranged on the two sides of the upper portion of the cold trap body respectively, the first connecting pipe is communicated with a distillation tower, and the second connecting pipe is communicated with a vacuum unit inlet. A vertical baffle is fixedly arranged in the middle of the interior of the cold trap, two sets of cooling coils are symmetrically and fixedly arranged on the two sides of the baffle, and the cooling coils communicate with a circulating water system. And the bottom of the cold hydrazine is provided with an outflow port, and the outflow port is communicated with the collecting tank. According to the utility model, wax oil steam is condensed through the two groups of cooling coils, the condensed wax oil enters the collecting tank through the outflow port, and clean gas enters the vacuum unit to be discharged, so that the purpose of removing the wax oil is achieved, and the wax oil is prevented from entering the vacuum unit to damage equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of Fischer-Tropsch wax processing, in particular to a vacuum unit inlet dewaxing oil cooling hydrazine. Background Art

[0002] The Fischer-Tropsch wax refining process is as follows: the raw material is pressurized by a feed pump from the tank area and then sent to a primary thin film evaporator. The material is instantly heated by the thin film evaporator, and the light component is condensed and cooled by the condenser and then enters the thin film light phase collection tank. It is then taken out of the tank area by a thin film light phase production pump as the target product, 48# wax process candle special wax.

[0003] At present, the vacuum unit of the thin film evaporator has a high wax oil content in normal operation. Directly entering the vacuum unit will destroy the vacuum oil of the vacuum unit and block the unit pipeline, shortening the equipment operation cycle. Therefore, in view of the shortcomings of the existing technology, a wax removal oil cooling hydrazine device is developed to filter the oil wax in the thin film evaporator to ensure that the operation process of the vacuum unit is not affected. Utility Model Content

[0004] The utility model aims to provide a vacuum unit inlet wax removal oil cooling hydrazine to solve the technical problems existing in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model discloses a vacuum unit inlet wax removal oil cooling hydrazine, comprising a cooling hydrazine, wherein the cooling hydrazine is fixed on the ground through a bracket, and a first connecting pipe and a second connecting pipe connected with the inside of the cooling hydrazine are respectively arranged on both sides of the upper part of the cooling hydrazine, wherein the first connecting pipe is connected with a distillation tower, and the second connecting pipe is connected with the vacuum unit inlet; a vertical baffle is fixedly arranged in the middle of the interior of the cooling hydrazine, and two groups of cooling coils are symmetrically fixedly arranged on both sides of the baffle, and each of the cooling coils is connected with a circulating water system; a flow outlet is arranged at the bottom of the cooling hydrazine, so that the flow outlet is connected with a collection tank.

[0007] Furthermore, a spiral heating tube is sleeved on the outer peripheral wall of the first connecting tube.

[0008] Furthermore, a sampling port connected to the interior of the second connecting tube is provided at the bottom of the second connecting tube.

[0009] Furthermore, a cover is provided on the top of the cold hydrazine, wherein both ends of one of the cooling coils extend above the cover of the cold hydrazine and are respectively provided with a first cold water inlet and a first cold water outlet for connecting with the circulating water system; both ends of the other cooling coil extend above the cover of the cold hydrazine and are respectively provided with a second cold water inlet and a second cold water outlet for connecting with the circulating water system.

[0010] Furthermore, the length of the two cooling coils is greater than the length of the baffle.

[0011] Furthermore, the outer part of the outflow port is provided with a steam jacket, and the upper and lower ends of the steam jacket are respectively provided with a steam inlet and a steam outlet communicated with the interior thereof.

[0012] Compared with the prior art, the beneficial technical effects of the utility model are:

[0013] The utility model condenses wax oil vapor through two groups of cooling coils, and the condensed wax oil enters the collection tank through the outflow port, and the clean gas enters the vacuum unit for discharge, thereby achieving the purpose of removing wax oil and preventing it from entering the vacuum unit and causing damage to the equipment. In addition, a sealing cover plate is provided on the upper part of the cold hydrazine of the utility model, and the condensed wax oil inside the cold hydrazine can be cleaned by opening the sealing cover plate, which is beneficial to ensuring its cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model will be further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the dewaxing oil cooling hydrazine at the inlet of the vacuum unit of the utility model;

[0017] Explanation of the reference numerals: 1. cold water, 2. first connecting pipe, 3. second connecting pipe, 4. cooling coil, 5. baffle, 6. spiral heating tube, 7. outflow port, 8. steam jacket, 9. bracket, 10. sampling port, 11. first cold water inlet, 12. first cold water outlet, 13. second cold water inlet, 14. second cold water outlet, 15. steam inlet, 16. steam outlet, 17. collecting tank. DETAILED DESCRIPTION

[0018] like Figure 1-Figure 2 As shown, a vacuum unit inlet dewaxing oil cold hydrant comprises a cold hydrant 1, which is fixedly mounted on the ground by a bracket 9. A first connecting pipe 2 and a second connecting pipe 3 connected to the inside of the cold hydrant 1 are respectively installed on both sides of the upper part of the cold hydrant 1, wherein the first connecting pipe 3 is connected to the distillation tower, and the second connecting pipe 4 is connected to the vacuum unit inlet.

[0019] A spiral heating tube 6 is installed on the outer wall of the first connecting tube 2 to prevent the wax oil vapor from condensing in the first connecting tube 2, avoid clogging the first connecting tube 2, avoid reducing the vacuum of the distillation tower and reducing the separation efficiency.

[0020] A vertical baffle 5 is fixedly installed in the middle of the cold hydrazine 1 to prevent the wax oil vapor entering the cold hydrazine 1 from directly entering the vacuum unit. The cold hydrazine 1 also has two groups of cooling coils 4 symmetrically fixedly installed on both sides of the baffle 5. Each of the cooling coils 4 is connected to the circulating water system to cool the wax oil vapor entering the cold hydrazine 1. The length of the two cooling coils 4 is greater than the length of the baffle 5, so that it can have a larger cooling area and a better wax removal effect.

[0021] In this embodiment, a cover is provided on the top of the cold hydrazine 1, and the cover can be opened regularly to clean the wax oil condensed on the cooling coil 4, which is beneficial to ensure the cooling effect of the cooling coil. The two ends of one of the cooling coils 4 extend above the cover of the cold hydrazine 1 and are respectively provided with a first cold water inlet 11 and a first cold water outlet 12 for connecting to the circulating water system. The two ends of the other cooling coil 4 extend above the cover of the cold hydrazine 1 and are respectively provided with a second cold water inlet 13 and a second cold water outlet 14 for connecting to the circulating water system.

[0022] The bottom of the cold hydrazine 1 is provided with a vertical outflow port 7 connected to the interior thereof, so the lower end of the outflow port 7 is connected to the collecting tank 17. The outflow port 7 is provided with a steam jacket 8 on the outside, and the upper and lower ends of the steam jacket 8 are respectively provided with a steam inlet 15 and a steam outlet 16 connected to the interior thereof.

[0023] A sampling port 10 connected to the interior of the second connecting pipe 3 is installed at the bottom thereof, and the sampling port 10 can be opened regularly for sampling and analysis.

[0024] The working mode of the utility model is as follows:

[0025] First, fix the utility model on a flat place, connect one side of the cold hydrazine to the distillation tower through the first connecting pipe, and use the spiral heating tube on the first connecting pipe, connect the other side of the cold hydrazine to the inlet of the vacuum unit through the second connecting pipe, and close the sampling port. Then connect the cooling coil in the cold hydrazine to the pipeline of the circulating water system. The cooling coil in the cold hydrazine is divided into two groups, each group is separately provided with a cold water inlet and a cold water outlet. After the connection is completed, open the circulating water inlet and circulating water return valves, open the valve on the outflow outlet at the bottom of the cold hydrazine, and use the steam jacket to heat the outflow outlet.

[0026] After normal production, the wax oil vapor enters the cold hydrazine for condensation, and the condensed wax oil flows into the collection tank at the bottom through the outflow port. The wax oil in the collection tank can be discharged after the next shutdown. If the degreasing effect is found to be worse, it means that too much wax oil has condensed on the cooling plate, resulting in poor cooling effect. It is necessary to open the cover on the cold hydrazine to remove the condensed wax on the cooling coil. After removal, reinstall the cover and continue to use it. The wax oil removal effect of the cold hydrazine can be analyzed by sampling regularly through the sampling port.

[0027] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A vacuum unit inlet dewaxing oil cooling hydrazine, characterized in that: It includes a cold hydrazine, which is fixed on the ground through a bracket, and a first connecting pipe and a second connecting pipe connected to the inside of the cold hydrazine are respectively arranged on both sides of the upper part of the cold hydrazine, the first connecting pipe is connected to the distillation tower, and the second connecting pipe is connected to the inlet of the vacuum unit; a vertical baffle is fixedly arranged in the middle of the interior of the cold hydrazine, and two groups of cooling coils are symmetrically fixedly arranged on both sides of the baffle, and each of the cooling coils is connected to a circulating water system; a flow outlet is arranged at the bottom of the cold hydrazine, so that the flow outlet is connected to a collection tank.

2. The dewaxing oil cooling hydrazine at the inlet of the vacuum unit according to claim 1, characterized in that: A spiral heating tube is sleeved on the outer peripheral wall of the first connecting tube.

3. The dewaxing oil cooling hydrazine at the inlet of the vacuum unit according to claim 1, characterized in that: The bottom of the second connecting tube is provided with a sampling port communicated with the interior thereof.

4. The dewaxing oil cooling hydrazine at the inlet of the vacuum unit according to claim 1, characterized in that: A sealing cover is provided on the top of the cold hydrazine, wherein both ends of one of the cooling coils extend above the sealing cover of the cold hydrazine and are respectively provided with a first cold water inlet and a first cold water outlet for connecting with the circulating water system; both ends of the other cooling coils extend above the sealing cover of the cold hydrazine and are respectively provided with a second cold water inlet and a second cold water outlet for connecting with the circulating water system.

5. The dewaxing oil cooling hydrazine at the inlet of the vacuum unit according to claim 4, characterized in that: The length of the two cooling coils is greater than the length of the baffle.

6. The dewaxing oil cooling hydrazine at the inlet of the vacuum unit according to claim 1, characterized in that: The outer part of the outflow port is provided with a steam jacket, and the upper and lower ends of the steam jacket are respectively provided with a steam inlet and a steam outlet which are connected with the interior thereof.

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