CN221084702U - Biodiesel decompression rectification reflux control device - Google Patents
Biodiesel decompression rectification reflux control device Download PDFInfo
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- CN221084702U CN221084702U CN202322764067.XU CN202322764067U CN221084702U CN 221084702 U CN221084702 U CN 221084702U CN 202322764067 U CN202322764067 U CN 202322764067U CN 221084702 U CN221084702 U CN 221084702U
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- regulating valve
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- 238000010992 reflux Methods 0.000 title claims abstract description 110
- 239000003225 biodiesel Substances 0.000 title claims abstract description 31
- 230000006837 decompression Effects 0.000 title claims description 7
- 238000007599 discharging Methods 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 230000001105 regulatory effect Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 description 15
- 239000000047 product Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 239000013067 intermediate product Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Jet Pumps And Other Pumps (AREA)
Abstract
The utility model discloses a biodiesel vacuum rectification reflux control device, which comprises a rectifying tower, a reflux pump, a buffer tank, a discharging reflux control system and a pipeline valve, wherein the rectifying tower is connected with the reflux pump; the buffer tank cylinder is provided with a vacuum port, a feed port, an overflow port, an upper liquid level meter port, a lower liquid level meter port, a reflux port, a steam tracing coil pipe, a temperature measuring port and a discharge port, and is supported by an ear seat, a flitch and a supporting frame; the outlet of the reflux pump is connected to the upper part of the rectifying tower through a pipeline with a reflux regulating valve, and the inlet of the reflux pump is connected to a reflux port of the buffer tank through a pipeline with a valve; a discharge regulating valve is arranged on a merging pipeline of the overflow port and the discharge port of the buffer tank; the discharging reflux control system comprises a magnetic flap level meter with a liquid level sensor, a discharging regulating valve, a mass flowmeter, a program control system PLC, a computer and an electric control cabinet, wherein the PLC is connected with the discharging regulating valve, the reflux regulating valve, the liquid level sensor and the computer through signal wires. The utility model solves the problem that the prior art can not ensure the reflux quantity stability during the rectification of biodiesel.
Description
Technical Field
The utility model relates to the technical field of biodiesel production devices of organic chemical products, in particular to a biodiesel vacuum rectification reflux control device.
Background
In the chemical production process, the rectifying tower is a commonly used device when different components of the mixed species are required to be separated. The working principle is based on the difference of boiling points of different components, and the different components are evaporated and separated at different temperatures by heating the mixture and separating the mixture in a tower. During the production of biodiesel, the intermediate product is rectified to obtain biodiesel with different technical indexes, which is closely related to the vacuum degree of the tower body and the gas phase temperature after gasification in the rectification process. In the rectification process of biodiesel, the vacuum degree is generally controlled by a vacuum machine, and the fluctuation range of the vacuum degree is smaller under the condition that a variable-frequency vacuum pump or a current-limiting vacuum pipeline is not used at present, so that the production of biodiesel can be controlled by controlling the gas phase temperature of a rectifying tower under the condition that other conditions are relatively fixed, and the control of the gas phase temperature is mainly regulated by heating a reboiler and refluxing a product, so that the control of the reflux in the rectification process is particularly important.
The reflux of the rectifying tower in the existing biodiesel rectifying technology mainly comprises two modes of self-reflux of a discharging pipeline and reflux of the discharging reflux pump directly, and the evaporation capacity of the rectifying tower also frequently fluctuates at a certain temperature due to the difference of intermediate product components, so that the stability of the reflux quantity in the rectifying process cannot be ensured in the two modes, and the stability of the biodiesel product index is influenced. Therefore, it is necessary to provide a biodiesel vacuum rectification reflux control device capable of ensuring stable discharging and reflux during biodiesel rectification.
Disclosure of utility model
The utility model aims to provide a biodiesel vacuum rectification reflux control device which has stable discharging and reflux during rectification of biodiesel, simple and compact structure and convenient and efficient operation, and solves the problem that the prior art cannot ensure the stability of the reflux quantity in the rectification process.
In order to achieve the above purpose, the biodiesel decompression rectification reflux control device comprises a rectification tower 16, a reflux pump 17, a rectification tower discharging reflux buffer tank 22, a discharging reflux control system and a pipeline valve; the top of a cylinder body 3 of a rectifying tower discharging reflux buffer tank 22 is provided with a vacuum port 1 and a feeding port 2, the middle upper part is provided with an overflow port 4 and an upper liquid level meter port 15, the middle part is provided with a reflux port 14, the middle lower part is provided with a heat tracing coil pipe 13 with a steam inlet 7 and a steam outlet 10, the lower part is provided with a temperature measuring port 8 and a lower liquid level meter port 12, the bottom is provided with a discharging port 11, and the cylinder body 3 is supported by an ear seat 5, a flitch 6 and a supporting frame 9; the outlet of the reflux pump 17 is connected to the upper part of the rectifying tower 16 through a pipeline with a reflux regulating valve 18, and the inlet of the reflux pump 17 is connected to the reflux port 14 through a pipeline with a valve; a discharge regulating valve 21 is arranged on a merging pipeline of the overflow port 4 and the discharge port 11 of the rectifying tower discharge reflux buffer tank 22; the discharging reflux control system comprises a magnetic flap level meter with a liquid level sensor 20, a discharging regulating valve 21, a mass flowmeter, a program control system PLC, a computer and an electric control cabinet, wherein the PLC is connected with the discharging regulating valve 21, the reflux regulating valve 18, the liquid level sensor 20 and the computer through reflux and a liquid level linkage control line 19.
The reflux pump 17 is a pump with a height Wen Huagong, and a proper model is selected according to the designed reflux amount and the height of the rectifying tower; the top of the rectifying tower 16 is provided with a gas phase outlet, the gas phase is condensed (the gas phase is merged with a vacuum pipeline midway and then enters the vacuum port 1 to reduce the pressure difference between the upstream and the downstream and ensure smooth discharging) and is converged into the feed inlet 2, and the material in the rectifying tower discharging reflux buffer tank 22 is fed into the upper part of the rectifying tower 16 through a reflux port 14 and a reflux pump 17.
The upper control computer of the discharging reflux control system is internally provided with macro industrial configuration software V1.0, the software system is used for displaying and recording the data of each process point and controlling, the software development merchant is the macro computer technology company in Longyan city, and the time of software marketing is 2018, which belongs to the prior art; the PLC of the program control system is developed by Longsha Tian macro computer technology Co-Ltd, the brand of the PLC is Siemens, the CPU and the acquisition control module of the PLC system are S7-1200 series general products of Siemens, and the PLC software programming is written by Longsha Tian macro computer technology Co-Ltd according to requirements; all software and hardware with computer programs belong to the state of the art, which is commercially available.
The existing self-reflux process in the biodiesel rectification technology is to enable the evaporated residual materials to flow back into the tower by controlling the size of the discharge amount, and the disadvantage is that the size of the reflux amount cannot be detected or controlled, and the stability of the product quality cannot be ensured; the reflux control without the reflux buffer tank is a mode of directly pumping the reflux tube into the tower, and the flow rate can be controlled by observing the flowmeter, but the reflux process cannot be ensured to be broken, so that the stability of the system cannot be maintained. After the reflux buffer tank is additionally arranged, the reflux control device for biodiesel reduced pressure rectification can ensure the sustainability of the reflux by observing the liquid level of the reflux buffer tank, ensure the stability of the system, has a simple procedure and flexible and simple operation, and can greatly improve the stability and the product percent of pass of the biodiesel rectification system.
The biodiesel decompression rectification reflux control device provided by the utility model can effectively control the discharging and reflux in the biodiesel rectification process by adopting the rectification tower discharging and reflux integrated buffer device, and ensures the stable discharging and reflux in the biodiesel rectification process.
Drawings
FIG. 1 is a schematic diagram of the structure of the biodiesel vacuum rectification reflux control device.
Fig. 2 is an enlarged schematic diagram of the rectifying tower discharge reflux buffer tank in fig. 1.
Reference numerals: the vacuum device comprises a vacuum port 1, a feed port 2, a cylinder 3, an overflow port 4, an ear seat 5, a flitch 6, a steam inlet 7, a temperature measuring port 8, a supporting frame 9, a steam outlet 10, a discharge port 11, a lower liquid level meter port 12, a heat tracing coil 13, a reflux port 14, an upper liquid level meter port 15, a rectifying tower 16, a reflux pump 17, a reflux regulating valve 18, a reflux and liquid level linkage control line 19, a liquid level sensor 20, a discharge regulating valve 21 and a rectifying tower discharge reflux buffer tank 22.
Detailed Description
The specific embodiment of the biodiesel vacuum rectification reflux control device is further described in detail below with reference to the accompanying drawings.
1-2, The biodiesel decompression rectification reflux control device comprises a rectification tower 16, a reflux pump 17, a rectification tower discharge reflux buffer tank 22, a discharge reflux control system and a pipeline valve; the top of a cylinder body 3 of a rectifying tower discharging reflux buffer tank 22 is provided with a vacuum port 1 and a feeding port 2, the middle upper part is provided with an overflow port 4 and an upper liquid level meter port 15, the middle part is provided with a reflux port 14, the middle lower part is provided with a heat tracing coil pipe 13 with a steam inlet 7 and a steam outlet 10, the lower part is provided with a temperature measuring port 8 and a lower liquid level meter port 12, the bottom is provided with a discharging port 11, and the cylinder body 3 is supported by an ear seat 5, a flitch 6 and a supporting frame 9; the outlet of the reflux pump 17 is connected to the upper part of the rectifying tower 16 through a pipeline with a reflux regulating valve 18, and the inlet of the reflux pump 17 is connected to the reflux port 14 through a pipeline with a valve; a discharge regulating valve 21 is arranged on a merging pipeline of the overflow port 4 and the discharge port 11 of the rectifying tower discharge reflux buffer tank 22; the discharging reflux control system comprises a magnetic flap level meter with a liquid level sensor 20, a discharging regulating valve 21, a mass flowmeter, a program control system PLC, a computer and an electric control cabinet, wherein the PLC is connected with the discharging regulating valve 21, the reflux regulating valve 18, the liquid level sensor 20 and the computer through reflux and a liquid level linkage control line 19.
The operation of the biodiesel decompression rectification reflux control device is as follows:
In the rectification process, the whole system is pumped to the negative pressure required by the process through a vacuum machine, after an intermediate product is heated to a certain temperature, biodiesel is distilled out from the top of the rectification tower, and enters a reflux buffer tank through a feeding pipe after being cooled, when the liquid level of the reflux buffer tank is full of an overflow port (as known by a liquid level meter), whether a steam inlet and outlet pipeline is opened is judged by observing the temperature of the reflux buffer tank, so that the material is prevented from being frozen and blocked, then the reflux pipeline and a discharging pipeline are opened, the balance of the system is maintained by controlling the liquid level, the reflux flow and the discharging flow of the reflux buffer tank, wherein the gas phase temperature of the rectification tower can be controlled by adjusting the reflux, and after the index of the biodiesel is qualified, the automatic interlocking of the reflux buffer tank and a discharging regulating valve is started so as to maintain the liquid level temperature of the reflux buffer tank, the reflux is ensured not to be broken, and the balance of the system is maintained. Under special conditions (such as wide product technical index range and larger boiling point limit range), the automatic interlocking of the liquid level of the reflux buffer tank and the reflux regulating valve can be started, and the control method can ensure the yield of biodiesel finished products.
Claims (1)
1. A biodiesel decompression rectification reflux control device is characterized in that: the device comprises a rectifying tower (16), a reflux pump (17), a rectifying tower discharging reflux buffer tank (22), a discharging reflux control system and a pipeline valve; the top of a barrel body (3) of the rectifying tower discharging reflux buffer tank (22) is provided with a vacuum port (1) and a feeding port (2), the middle upper part is provided with an overflow port (4) and an upper liquid level meter port (15), the middle part is provided with a reflux port (14), the middle lower part is provided with a heat tracing coil pipe (13) with a steam inlet (7) and a steam outlet (10), the lower part is provided with a temperature measuring port (8) and a lower liquid level meter port (12), the bottom is provided with a discharging port (11), and the barrel body (3) is supported by an ear seat (5), a flitch (6) and a supporting frame (9); the outlet of the reflux pump (17) is connected to the upper part of the rectifying tower (16) through a pipeline with a reflux regulating valve (18), and the inlet of the reflux pump (17) is connected to the reflux port (14) through a pipeline with a valve; a discharge regulating valve (21) is arranged on a merging pipeline of an overflow port (4) and a discharge port (11) of the rectifying tower discharge reflux buffer tank (22); the discharging reflux control system comprises a magnetic flap level meter with a liquid level sensor (20), a discharging regulating valve (21), a mass flowmeter, a program control system PLC, a computer and an electric control cabinet, wherein the PLC is connected with the discharging regulating valve (21), the reflux regulating valve (18), the liquid level sensor (20) and the computer through reflux and a liquid level linkage control line (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322764067.XU CN221084702U (en) | 2023-10-16 | 2023-10-16 | Biodiesel decompression rectification reflux control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322764067.XU CN221084702U (en) | 2023-10-16 | 2023-10-16 | Biodiesel decompression rectification reflux control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221084702U true CN221084702U (en) | 2024-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322764067.XU Active CN221084702U (en) | 2023-10-16 | 2023-10-16 | Biodiesel decompression rectification reflux control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221084702U (en) |
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2023
- 2023-10-16 CN CN202322764067.XU patent/CN221084702U/en active Active
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