CN220722230U - Air seal type glycine filtrate storage tank system - Google Patents
Air seal type glycine filtrate storage tank system Download PDFInfo
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- CN220722230U CN220722230U CN202322205039.4U CN202322205039U CN220722230U CN 220722230 U CN220722230 U CN 220722230U CN 202322205039 U CN202322205039 U CN 202322205039U CN 220722230 U CN220722230 U CN 220722230U
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Abstract
本实用新型属于化工生产设备技术领域，公开了一种气封式甘氨酸滤液储槽系统。本系统包括储槽，储槽由储槽壁、储槽底板和储槽盖板密闭组成；储槽壁两侧分别设有滤液入口和滤液出口；储槽壁一侧外接真空泵；储槽盖板上设有气封气体入口、气封气体出口、压力传感器、滤液液面传感器和晶体上缘传感器；压力传感器用于监测储槽内的气封压力；滤液液面传感器用于监测储槽中的滤液是否到达滤液最高液位线；晶体上缘传感器用于监测储槽中析出的晶体是否到达晶体堆上缘最高线。本实用新型以氮气或二氧化碳气封隔绝空气，有效消除火灾隐患；通过及时清理结晶，有效避免结晶堵塞阀门或管道；该系统设备投入成本低、操作简单，更有效地保证滤液储存的安全。
The utility model belongs to the technical field of chemical production equipment, and discloses a gas-sealed glycine filtrate storage tank system. The system includes a storage tank, which is airtightly composed of a storage tank wall, a storage tank bottom plate and a storage tank cover plate; a filtrate inlet and a filtrate outlet are respectively arranged on both sides of the storage tank wall; a vacuum pump is externally connected to one side of the storage tank wall; a gas-sealed gas inlet, a gas-sealed gas outlet, a pressure sensor, a filtrate level sensor and a crystal upper edge sensor are arranged on the storage tank cover plate; the pressure sensor is used to monitor the gas-sealed pressure in the storage tank; the filtrate level sensor is used to monitor whether the filtrate in the storage tank reaches the highest liquid level line of the filtrate; the crystal upper edge sensor is used to monitor whether the crystals precipitated in the storage tank reach the highest line of the upper edge of the crystal pile. The utility model isolates the air with nitrogen or carbon dioxide gas sealing, effectively eliminating fire hazards; by timely cleaning crystals, it is effectively avoided that the crystals block valves or pipelines; the system equipment has low investment cost and simple operation, and more effectively ensures the safety of filtrate storage.
Description
Technical Field
The utility model belongs to the technical field of chemical production equipment, and particularly relates to an air-sealed glycine filtrate storage tank system.
Background
Glycine is the simplest amino acid and is also one of the most productive amino acids. One of the production methods is chloroacetic acid ammoniation method, namely, water is used as a solvent and a reaction medium, chloroacetic acid and ammonia react to generate a complex aqueous solution of glycine and ammonium chloride under the catalysis of urotropine, and a large amount of methanol is added into the aqueous solution to precipitate most of glycine. Filtering, wherein the filter cake is glycine, precipitating the filtrate in a storage tank, further crystallizing, then performing subsequent rectification, evaporation and other procedures, recovering methanol and ammonium chloride, applying the methanol mechanically, and selling the ammonium chloride as a byproduct.
The process flow of glycine production is shown in figure 1, and the reaction formula is as follows:
in this production process, the safety of the storage tank is particularly important, because: the content of methanol in the filtrate is up to 70%, the boiling point of the methanol is only 64 ℃, a large amount of methanol steam is arranged above the liquid level of the storage tank, and if the fire is exposed, the fire is extremely easy to burn, and the fire is caused. Therefore, how to eliminate the fire hazard becomes a problem to be considered.
In order to solve the problems in the prior art, a storage tank can be used for replacing the storage tank, and open fire can be effectively isolated by utilizing the characteristic that the storage tank is completely airtight. However, each ton of glycine finished product is produced, the produced liquid filtering amount is 12m 3 The filtrate yield is high, so that the scheme needs a large number of storage tanks, the equipment investment is high, and the tasks of operation and daily management are heavy; meanwhile, in order to prevent blockage of pipelines and valves caused by crystallization, the storage tank is required to be insulated to prevent crystallization after cooling, so that the complexity of equipment is further increased, the economy and the practicability are poor, and the operation is complex.
Disclosure of Invention
Aiming at the technical problems in the prior art, the utility model provides a gas seal type glycine filtrate storage tank system, which can effectively eliminate fire hazard by using nonflammable gas to seal the filtrate storage tank with gas to isolate air; through timely clearance crystallization, can effectively avoid crystallization to block up valve or pipeline, and this system equipment input cost is low, easy operation, can guarantee the safety that the filtrate was stored more effectively.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
an air-sealed glycine filtrate storage tank system comprises a storage tank, wherein the storage tank consists of a storage tank wall, a storage tank bottom plate and a storage tank cover plate in a sealing manner;
filtrate inlets and filtrate outlets are respectively arranged on two sides of the storage tank wall; the filtrate inlet is connected with a filtrate filter through a liquid inlet pipeline, and the filtrate outlet is externally connected with a material transferring pump through a liquid outlet pipeline; one side of the storage tank wall is externally connected with a vacuum pump;
the storage tank cover plate is provided with an air seal gas inlet, an air seal gas outlet, a pressure sensor, a filtrate liquid level sensor and a crystal upper edge sensor; the gas seal gas inlet is connected with a gas seal gas conveying device through a gas inlet pipeline; the gas seal gas outlet is emptied through a gas outlet pipeline; the pressure sensor is used for monitoring the air seal pressure in the storage tank; the filtrate liquid level sensor is used for monitoring whether filtrate in the storage tank reaches a filtrate highest liquid level line; the crystal upper edge sensor is used for monitoring whether the crystals precipitated in the storage tank reach the highest line of the upper edge of the crystal pile.
Further, the middle of the storage tank cover plate is provided with the gas seal gas outlet, and a plurality of gas seal gas inlets are uniformly arranged on the storage tank cover plate around the gas seal gas outlet.
Further, the gas seal gas is nitrogen or carbon dioxide.
Further, a porous baffle is fixedly arranged in the storage tank perpendicular to the flowing direction of the filtrate, and the porous baffle is used for blocking and slowing down the flowing speed of the filtrate in the storage tank.
Further, a plurality of porous partition plates are arranged in the storage tank at intervals.
Further, the left upper end of the storage tank is provided with the filtrate inlet, and the right lower end of the storage tank is provided with the filtrate outlet.
Further, the storage tanks are connected in parallel to form a storage tank system together, and when one storage tank cleans crystals, the rest storage tanks work normally.
Further, an air inlet one-way valve is arranged on an air inlet pipeline of the air seal gas inlet, and an air outlet one-way valve is arranged on an air outlet pipeline of the air seal gas outlet;
the liquid inlet valve is arranged on the liquid inlet pipeline of the filtrate inlet, and the liquid outlet valve is arranged on the liquid outlet pipeline of the filtrate outlet.
Still further, the system also comprises a DCS control system; the DCS control system controls the air inlet one-way valve, the air outlet one-way valve and the pressure sensor in a linkage way, and dynamically adjusts the air seal pressure in the storage tank to be within a set safe pressure range value.
Furthermore, the DCS control system is in signal connection with the filtrate liquid level sensor and the crystal upper edge sensor, and is used for controlling the liquid inlet valve and the liquid outlet valve in a linkage way through detection information of the filtrate liquid level sensor and the crystal upper edge sensor, so as to automatically control liquid inlet and liquid outlet of the storage tank.
Compared with the prior art, the utility model has the beneficial effects that:
(1) According to the filtrate storage tank system provided by the utility model, the purpose of effectively eliminating fire hazards can be achieved by sealing the filtrate storage tank with non-combustible gas (such as carbon dioxide or nitrogen) to isolate air; the pressure sensor is used for monitoring the air seal pressure in the storage tank, regulating and controlling the air seal pressure to be micro-positive pressure and within a set safe pressure range value, so that the filtrate is effectively isolated from the air; the upper edge of the crystal precipitated in the storage tank is detected by the crystal upper edge sensor, so that the crystal precipitated in the storage tank can be timely stopped and cleaned, and the phenomenon that the crystal blocks a valve or a pipeline is effectively avoided; the equipment adopted by the whole system has low input cost and simple operation, and can give consideration to the safety of filtrate storage, the reliability of system operation and the economical efficiency of industrial production;
(2) According to the filtrate storage tank system, the porous partition plates are arranged in the storage tank and perpendicular to the flowing direction of filtrate, so that the flowing speed of the filtrate in the storage tank can be blocked and slowed down, the crystallization time is increased, and crystallization is more complete and thorough; meanwhile, a plurality of porous baffles can be arranged at intervals according to actual conditions so as to further slow down the flow rate of filtrate and facilitate crystallization;
(3) The filtrate storage tank system provided by the utility model further comprises a DCS control system, wherein the DCS control system is used for controlling the air inlet one-way valve, the air outlet one-way valve and the pressure sensor in a linkage way, and the air seal pressure in the storage tank is dynamically regulated to be in a set micro-positive pressure range, so that filtrate and air are effectively isolated; meanwhile, the DCS control system detects the liquid level of the filtrate through a liquid level sensor of the filtrate, detects the upper edge of the precipitated crystal through a crystal upper edge sensor, and controls the liquid inlet valve and the liquid outlet valve in a linkage manner to automatically control the liquid inlet and the liquid outlet of the storage tank, so that the liquid level of the filtrate in the storage tank is controlled or the operation of cleaning and crystallizing is performed, and the degree of automation is high;
(4) According to the filtrate storage tank system provided by the utility model, a plurality of storage tanks can be arranged in parallel, and when one storage tank pauses to clean crystals, the rest storage tanks still continue to operate, so that normal production can be ensured, the working efficiency of the system is further improved, and normal production is ensured.
Drawings
FIG. 1 is a flow chart of a prior glycine production process;
FIG. 2 is a schematic diagram of an embodiment of a gas seal glycine filtrate tank system;
the figure indicates: 1-a groove wall; 2-a sump floor; 3-a storage tank cover plate; 4-a filtrate inlet; 5-a filtrate outlet; 6, a material transferring pump; 7-gas seal gas inlet; 8-an air seal gas outlet; 9-a pressure sensor; 10-a filtrate level sensor; 11-a crystal upper edge sensor; 12-a filtrate highest level line; 13-the upper edge line of the crystal stack; 14-a vacuum pump; 15-an air inlet one-way valve; 16-an air outlet one-way valve; 17-porous separator; 18-a liquid inlet valve; 19-a liquid outlet valve; 20-vacuum pump suction valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
Example 1
Referring to fig. 2, an embodiment of the present utility model provides an air-sealed glycine filtrate tank system, which comprises a tank, wherein the tank is formed by a tank wall 1, a tank bottom plate 2 and a tank cover plate 3 in a sealing manner;
the upper end of the left side of the storage tank wall 1 is provided with a filtrate inlet 4, and the lower end of the right side is provided with a filtrate outlet 5; the filtrate inlet 4 is connected with a filtrate filter through a liquid inlet pipeline, the filtrate outlet 5 is externally connected with a transfer pump 6 through a liquid outlet pipeline, and the transfer pump 6 pumps filtrate to the next process (rectifying process) through a pipeline; one side of the tank wall 1 is externally connected with a vacuum pump 14 through a vacuum pumping pipeline and is used for vacuumizing the inner cavity of the storage tank; a vacuum pump suction valve 20 is arranged on the vacuum suction pipeline;
the storage tank cover plate 3 is provided with an air seal gas inlet 7, an air seal gas outlet 8, a pressure sensor 9, a filtrate liquid level sensor 10 and a crystal upper edge sensor 11; the gas seal gas inlet 7 is connected with a gas seal gas conveying device (such as a gas making device or a pipe network) through a gas inlet pipeline, the gas seal gas outlet 8 is emptied through a gas outlet pipeline, the pressure sensor 9 is used for monitoring gas seal pressure in the storage tank, the filtrate liquid level sensor 10 is used for monitoring whether filtrate in the storage tank reaches a filtrate highest liquid level line 12, and the crystal upper edge sensor 11 is used for monitoring whether crystals precipitated in the storage tank reach a crystal pile upper edge highest line 13.
In the embodiment of the utility model, the gas seal gas is nitrogen or carbon dioxide.
As a further improvement, the air seal gas outlet 8 is arranged in the middle of the storage tank cover plate 3, and 8-15 air seal gas inlets 7 are uniformly arranged on the storage tank cover plate 3 around the air seal gas outlet 8.
The purpose of this arrangement is: the air seal gas can be uniformly distributed in the space between the filtrate and the storage tank, and can stay more stably, thereby playing a role in effectively isolating air.
In the embodiment of the utility model, an air inlet one-way valve 15 is arranged on an air inlet pipeline of the air seal gas inlet 7, and an air outlet one-way valve 16 is arranged on an air outlet pipeline of the air seal gas outlet 8; a liquid inlet valve 18 is arranged on a liquid inlet pipeline of the filtrate inlet 4, and a liquid outlet valve 19 is arranged on a liquid outlet pipeline of the filtrate outlet 5.
As a further improvement, the total cross-sectional area of the gas seal gas inlet 7 and the gas inlet check valve 15 is slightly larger than the total cross-sectional area of the gas seal gas outlet 8 and the gas outlet check valve 16 in order to maintain a slight positive pressure in the reservoir.
In the embodiment of the utility model, the highest filtrate level line 12 should be slightly lower than the filtrate inlet 4 in order to better feed filtrate; the highest line 13 at the upper edge of the crystal pile is slightly lower than the filtrate outlet 5 so as to avoid that precipitated crystals block the filtrate outlet 5 and influence liquid discharge.
The working process of the filtrate storage tank system of the embodiment of the utility model is as follows:
(1) Feeding liquid: when the operation is started, the vacuum pump air suction valve 20 is opened, all valves except the vacuum pump air suction valve 20 are closed, the vacuum pump 14 is used for vacuumizing the storage tank, then the vacuum pump air suction valve 20 is closed, and the liquid inlet valve 18 is opened to discharge filtrate; filtrate enters a storage tank from a filtrate inlet 4, and the filtrate stays in the storage tank to further separate out glycine crystals; when the filtrate quantity reaches the highest filtrate level line 12, the liquid inlet valve 18 is closed, and filtrate inlet is suspended;
(2) And (3) air sealing: the air inlet one-way valve 15 is opened to supply air sealing gas, and the air outlet one-way valve 16 is opened to discharge gas, so that the aim of replacing residual air by the air sealing gas is fulfilled;
sampling and detecting at the outlet of the air outlet one-way valve 16, and closing the air outlet one-way valve 16 when the exhaust gas is detected to be the air seal gas after the replacement is finished;
then the pressure sensor 9 detects the pressure of the storage tank, and when the pressure in the storage tank is higher than 0.02MPa, the air inlet one-way valve 15 is closed, and the air inlet sealing gas is stopped;
(3) And (3) pressure maintaining operation: opening a liquid inlet valve 18 and a liquid outlet valve 19 to allow filtrate to enter from a filtrate inlet 4 at the left side of the storage tank, and discharging from a filtrate outlet 5 at the right side of the storage tank to enter a subsequent rectification process, wherein the filtrate in the storage tank keeps the liquid level almost unchanged in a dynamic balance manner, and crystallization is carried out in the flowing process of the filtrate;
meanwhile, in the pressure maintaining operation process, the pressure in the storage tank is monitored in real time through the pressure sensor 9; when the pressure in the storage tank is lower than the set pressure lower limit, opening the air inlet one-way valve 15, and allowing air seal gas to enter; when the pressure in the storage tank is higher than the upper limit of the set pressure, the air inlet one-way valve 15 is closed, and the air sealing gas stops entering, so that the pressure in the storage tank is ensured to be within the set safety pressure value range, the air is effectively isolated, and the safety of the storage tank is ensured;
in addition, when the pressure in the storage tank exceeds the upper limit value of the set pressure, the air outlet one-way valve 16 is automatically opened to exhaust, and when the pressure is reduced to the upper limit value of the set pressure, the air outlet one-way valve 16 is closed, so that the micro-positive pressure of the air seal gas in the storage tank can be maintained;
(4) Liquid discharge: when the crystal upper edge sensor 11 detects that the upper edge of the crystal pile reaches the highest line 5 of the upper edge of the crystal pile, the liquid inlet valve 18 is closed to stop feeding filtrate, meanwhile, the transfer pump 6 is started (if the transfer pump 6 is already running before, the transfer pump is not required to be restarted), and all filtrate in the storage tank is pumped into the rectification process;
(5) Cleaning and crystallizing: after the filtrate in the storage tank is emptied, the material transferring pump 6 and the liquid outlet valve 19 are closed, the storage tank stops working, and precipitated crystals are cleaned;
(6) And (3) circulation: and (5) after the cleaning is finished, repeating the steps (1) - (6), and continuing to start the next operation period.
Example 2
The embodiment of the utility model is based on the embodiment 1, the following improvement is made:
the storage tank is also fixedly provided with a porous partition plate 17 perpendicular to the flowing direction of the filtrate, and the porous partition plate 17 is used for blocking and slowing down the flowing speed of the filtrate in the storage tank, increasing crystallization time and enabling crystallization to be more complete and thorough.
As a further improvement, the porous partition plates 17 may be arranged at intervals according to actual conditions, so as to further slow down the flow rate of the filtrate, and facilitate crystallization.
Example 3
The embodiment of the utility model is based on the embodiment 1 or 2, the following improvements are made:
the filtrate storage tank system also comprises a DCS control system; the DCS control system controls the air inlet one-way valve 15, the air outlet one-way valve 16 and the pressure sensor 9 in a linkage way, and dynamically adjusts the air seal pressure in the storage tank to be within a set safe pressure range value so as to maintain a certain micro positive pressure in the storage tank, thereby effectively isolating filtrate from air.
Meanwhile, the DCS control system detects the liquid level of filtrate through the liquid level sensor 10 of filtrate, detects the upper edge of precipitated crystals through the upper edge sensor 11 of crystals, and controls the liquid inlet valve 18 and the liquid outlet valve 19 in a linkage manner to automatically control the liquid inlet and the liquid outlet of the storage tank, thereby controlling the liquid level of filtrate in the storage tank or performing the operation of cleaning and crystallizing, and having high automation degree.
Example 4
The embodiment of the utility model is based on any one of the embodiments 1-3, the following improvements are made:
the air seal glycine filtrate storage tank system comprises a plurality of storage tanks which are connected in parallel, for example, 4-20 storage tanks are connected in parallel, and when one storage tank pauses to clean crystals, the rest storage tanks still continue to operate, so that the working efficiency of the system can be improved, and the normal production is ensured.
The foregoing description is only exemplary of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the scope of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The air seal type glycine filtrate storage tank system is characterized by comprising a storage tank, wherein the storage tank consists of a storage tank wall, a storage tank bottom plate and a storage tank cover plate in a sealing manner;
filtrate inlets and filtrate outlets are respectively arranged on two sides of the storage tank wall; the filtrate inlet is connected with a filtrate filter through a liquid inlet pipeline, and the filtrate outlet is externally connected with a material transferring pump through a liquid outlet pipeline; one side of the storage tank wall is externally connected with a vacuum pump;
the storage tank cover plate is provided with an air seal gas inlet, an air seal gas outlet, a pressure sensor, a filtrate liquid level sensor and a crystal upper edge sensor; the gas seal gas inlet is connected with a gas seal gas conveying device through a gas inlet pipeline; the gas seal gas outlet is emptied through a gas outlet pipeline; the pressure sensor is used for monitoring the air seal pressure in the storage tank; the filtrate liquid level sensor is used for monitoring whether filtrate in the storage tank reaches a filtrate highest liquid level line; the crystal upper edge sensor is used for monitoring whether the crystals precipitated in the storage tank reach the highest line of the upper edge of the crystal pile.
2. The system of claim 1, wherein the gas seal gas outlet is arranged in the middle of the storage tank cover plate, and a plurality of gas seal gas inlets are uniformly arranged on the storage tank cover plate around the gas seal gas outlet.
3. The system of claim 1 or 2, wherein the gas seal gas is nitrogen or carbon dioxide.
4. The system of claim 1, wherein a porous partition is fixedly arranged in the storage tank perpendicular to the flow direction of the filtrate, and the porous partition is used for blocking and slowing down the flow speed of the filtrate in the storage tank.
5. The system of claim 4, wherein a plurality of said porous baffles are spaced apart within said reservoir.
6. The system of claim 1, wherein the filtrate inlet is provided at an upper left end of the tank and the filtrate outlet is provided at a lower right end.
7. The system of claim 1, wherein the reservoir is provided with a plurality of reservoirs in parallel, collectively comprising a reservoir system, and wherein when one of the reservoirs is cleaned of crystals, the remaining reservoirs function normally.
8. The system of any one of claims 1, 2, 4-7, wherein an inlet check valve is provided on an inlet pipe of the gas seal gas inlet, and an outlet check valve is provided on an outlet pipe of the gas seal gas outlet;
the liquid inlet valve is arranged on the liquid inlet pipeline of the filtrate inlet, and the liquid outlet valve is arranged on the liquid outlet pipeline of the filtrate outlet.
9. The system of claim 8, further comprising a DCS control system; the DCS control system controls the air inlet one-way valve, the air outlet one-way valve and the pressure sensor in a linkage way, and dynamically adjusts the air seal pressure in the storage tank to be within a set safe pressure range value.
10. The system of claim 9, wherein the DCS control system is in signal connection with the filtrate level sensor and the crystal upper edge sensor, and is configured to control the liquid inlet valve and the liquid outlet valve in linkage with the detection information of the filtrate level sensor and the crystal upper edge sensor, so as to automatically control the liquid inlet and the liquid outlet of the storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322205039.4U CN220722230U (en) | 2023-08-16 | 2023-08-16 | Air seal type glycine filtrate storage tank system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322205039.4U CN220722230U (en) | 2023-08-16 | 2023-08-16 | Air seal type glycine filtrate storage tank system |
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| Publication Number | Publication Date |
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| CN220722230U true CN220722230U (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322205039.4U Active CN220722230U (en) | 2023-08-16 | 2023-08-16 | Air seal type glycine filtrate storage tank system |
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| CN (1) | CN220722230U (en) |
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2023
- 2023-08-16 CN CN202322205039.4U patent/CN220722230U/en active Active
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Address after: 061100 East Area of Cangzhou Economic and Technological Development Zone, Cangzhou City, Hebei Province, east side of Zhi Er Road Patentee after: Yuan Da Huachen (Hebei) Biotechnology Co., Ltd. Country or region after: China Address before: 061108 Hebei Province, Cangzhou City, Dongling Economic and Technological Development Zone, East Area, east of Zhi Er Road Patentee before: Cangzhou Huachen Biotechnology Co.,Ltd. Country or region before: China |