CN203648495U - Sampling and charging device - Google Patents
Sampling and charging device Download PDFInfo
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- CN203648495U CN203648495U CN201320749878.6U CN201320749878U CN203648495U CN 203648495 U CN203648495 U CN 203648495U CN 201320749878 U CN201320749878 U CN 201320749878U CN 203648495 U CN203648495 U CN 203648495U
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Abstract
The utility model discloses a sampling and charging device which comprises a reaction kettle, a buffer tank, a first pipeline, a second pipeline, a third pipeline and a compressed air pipe. According to the sampling and charging device, sampling and charging devices are integrated, so that an operator does not need to go upstairs and downstairs, the sampling and charging device is convenient to operate, and the labor intensity is alleviated; the device can be used for realizing negative-pressure, normal-pressure and positive-pressure reaction kettle sampling, is applied to the actual production of multiple varieties with a single kettle in fine chemical industry, and is high in practicability; stopping, pressure releasing and the like are not required by sampling in a reaction process, so that the energy consumption is lowered, the time is saved, and the influence on the quality of a product caused by sampling or charging is also avoided; a plurality of sampling points can be arranged on the reaction kettle, and obtained samples are representative; residues in the pipelines and in-process analysis sampling excess materials can timely return to the reaction kettle, so that material loss and waste treatment burden can be reduced, and environmental pollution is alleviated; the buffer tank is used for charging, so that the operator is prevented from directly contacting with volatile reaction materials, and harm to the operator is reduced.
Description
Technical field
The utility model relates to a kind of sampling feeding device.
Background technology
Along with progressive, the scientific and technological development of society, the relation of the mankind and chemical industry is more and more closer, in the modern life, all be unable to do without chemical industry from material demands such as clothing, food, shelter, row to the cultural life such as culture and arts, amusement.The mankind's progress, the development of society is also had higher requirement to chemical industry.Tradition chemical industry progressively becomes the development trend of current chemical industry transition to fine chemistry industry; And that fine chemistry industry has is wide in variety, update fast, output is little, produces greatly mainly with intermittent mode, and reaction type is various.Relate to system response types such as malleation, normal pressure, negative pressure, high temperature, normal temperature, low temperature; Reaction pressure difference, sampling or the mode of application of sample are just different, if each stage of reaction how in safety, quick and easy taking-up reactor representative sample or each stage of reaction what to safety in reactor, quick and easy reinforced one of problem that chemical process need solve that becomes.
In traditional sampling and feed way, if malleation or normal-pressure reaction kettle are generally to utilize potential difference, or the mode of pressurization samples or feeds in raw material.For example; When malleation or normal-pressure reaction kettle sampling, mostly in reactor side or bottom, sample point is set, guides to suitable position by steel pipe, valve switch is set and controls sampling; While maybe the sample of finishing being returned in still add the auxiliary materials such as liquid state or solubility solid catalyst, polymerization inhibitor, defoamer during to reactor, feed pot Compressed Gas will be set on still and be pressed in still or charge door is set and directly add in still, autoclave needs first pressure release toward contact.If negative reaction, reinforced can arrange feed pot from top and add; When sampling, but because of the existence of negative pressure, make cannot meet enough potential differences in reality production, therefore, ordinary circumstance adopts pressure release sampling, or the mode of sampling with sampling pump.
In sum the sampling in the time of different condition and add sample loading mode all can exist below some problems: 1, sampling place and reinforced place do not carry out at same position, inconvenience in operation, labour intensity is large; 2, while sampling, often will first emit the residual material in pipeline, when the residual material of discharge and chemical examination, unnecessary sample cannot return in still, and material wastage is large; 3, when malleation is reacted pressure release, tend to take away material and cause loss of material, some reaction even can extend the reaction time or generate negative product; 4, when negative pressure pressure release start-stop vacuum system or while directly passing into air pressure relief vacuum equipment load large, equipment is caused to harmful effect, on the energy, also cause waste; 5,, when directly reinforced, if reaction mass smell is large, there is toxicity, serious and can be to environment to human injury; 6, while adding soluble solids supplies with feed pot, be easy to cause the sticky wall of solid material to add if material is volatile in reactor, thereby cause security incident, affect product yield or product quality.
Utility model content
The purpose of this utility model is to provide a kind of sampling feeding device.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:
A kind of sampling feeding device, comprises reactor, surge tank, the first pipeline, the second pipeline, the 3rd pipeline and compressed gas tube; The position of reactor is higher than surge tank;
First pipeline one end is communicated with reactor, and the other end leads to surge tank, and one end that the first pipeline is communicated with reactor is provided with the first valve, and one end that the first pipeline leads to surge tank is provided with the second valve;
Second pipeline one end is communicated with surge tank bottom, the other end is communicated with reactor top, the second pipeline and the first pipeline cross between the first valve and the second valve, the intersection of the second pipeline and the first pipeline is provided with the first three-way valve, the second pipeline between the first three-way valve and surge tank is provided with discharging opening, and discharging opening is provided with the 5th valve;
The 3rd pipeline one end is communicated with surge tank top, the second pipeline connection between the other end and the second valve and reactor, and connectivity part is provided with the second three-way valve;
Compressed gas tube one end is house steward, and the other end branches into the first branch road and the second branch road, the first branch road and the 3rd pipeline connection, and the first branch road is provided with the 3rd valve; The second branch road is communicated with surge tank bottom, and the second branch road is provided with the 4th valve;
The top of surge tank, be provided with successively the 6th valve and the aggregate bin being communicated with surge tank from top to bottom, aggregate bin be positioned at the second valve under.
Aggregate bin be positioned at the second valve under, the material falling from the second valve so just in time falls into aggregate bin.
Above-mentioned the second pipeline and the first pipeline cross between the first valve and the second valve, refer to that it is same section of pipeline that the second pipeline and the first pipeline cross overlapping between the first valve and the second valve, but separate separately again after having crossed this section.
The house steward of compressed gas tube is provided with gas pressure reducer.Can adjust easily like this air inflow.
On the second branch road, in the direction of leading to surge tank, be provided with successively reduced pipe, the 4th valve and the first check-valves.Said apparatus can effectively be controlled the size of air-flow, the first check-valves the refluence that has effectively prevented material is set.Above-mentioned reduced pipe is in the direction of leading to surge tank, up big and down small, and the air of being convenient to like this to control low discharge enters surge tank.
On the first branch road, leading in the direction of the 3rd pipeline, be provided with successively the 3rd valve and the second check-valves.Can effectively prevent like this backflow of material.
The inside of surge tank is smooth mirror surface, and the bottom of surge tank is conical structure, and surge tank is provided with sheet frame visor; Second pipeline of one end of close surge tank is provided with glass visor, and glass visor is between surge tank and the first three-way valve.Can improve like this accuracy of device control, whether being provided with of sheet frame visor is beneficial to observation surge tank liquid level, is beneficial to control, observe material and press dry only when the setting of glass visor is beneficial to purging or binder.The design of the polishing of surge tank inside and bottom conical structure has also effectively avoided solid material to glue wall.
One end that the first pipeline is communicated with reactor is provided with two the first above and connect valves, and two the first valves above and that connect are communicated with the differing heights of reactor respectively.Can on the differing heights of reactor, sample as required like this.
The utility model valve is all preferably ball valve, and more preferably aciculiform ball valve or stop valve of the 4th valve, is convenient to control flow.
The sampling purposes of above-mentioned sampling feeding device, the sampling method of normal pressure or malleation, comprises the following steps that order is joined:
1., close the second valve, the 3rd valve, the 4th valve and the 5th valve, open the first valve and the 6th valve, make the first three-way valve in " ┴ " state, the second three-way valve is in " ┤ " state;
2., slowly open the second valve, the material flowing out from the second valve falls into surge tank through aggregate bin, and in the first pipeline, residual material all falls into after surge tank, on aggregate bin, samples;
3., sampling after, close the second valve;
4., all fall into after surge tank until material in aggregate bin, close the 6th valve, the first three-way valve is switched to " ┬ " state, the second three-way valve switches to " ┴ " state, and by the material in surge tank, the first three-way valve, the second three-way valve from bottom second pipeline of surge tank is pressed in reactor from reactor top by passing into the Compressed Gas of compressed gas tube to open the 3rd valve;
5., close the 3rd valve, the second three-way valve is switched to " ┬ " state, complete primary sample operation.
The sampling method of negative pressure, comprises the following steps that order is joined:
1., close the second valve, the 3rd valve, the 4th valve, the 5th valve and the 6th valve, open the first valve, make the second three-way valve in " ┤ " state;
2., the first three-way valve switches to " ├ " state, now surge tank equates with the air pressure in reactor, because the material in liquid level difference reactor will flow into surge tank from buffering pot bottom through the first valve, the first three-way valve;
3., the first three-way valve is switched to " ┬ " state, the second three-way valve switches to " ┬ " state, opens the 6th valve, makes to form normal pressure in surge tank, slowly opens the 5th valve sampling;
4., after sampling, successively close the 5th valve and the 6th valve, the second three-way valve is switched to " ┴ " state, open the 3rd valve, pass into air material remaining in surge tank is pressed in still from reactor top from bottom the first three-way valve, second three-way valve of surge tank;
5., close the 3rd valve, the second three-way valve is switched to " ┬ " state, complete primary sample operation.
For fear of the impact of Liquid Residue in pipeline, the sampling method of negative pressure, preferably includes the following steps that order is joined:
1., close the second valve, the 3rd valve, the 4th valve, the 5th valve and the 6th valve, open the first valve, make the second three-way valve in " ┤ " state;
2., the first three-way valve switches to " ├ " state, now surge tank equates with the air pressure in reactor, because the material in liquid level difference reactor will flow into surge tank from buffering pot bottom through the first valve, the first three-way valve;
3., all flow into after surge tank until the residual material in pipeline, the first three-way valve is switched to " ┬ " state; The second three-way valve is switched to " ┴ " state, open the 3rd valve and pass into air, be greater than the air pressure in reactor because passing into of air makes air pressure in surge tank, thereby the material in surge tank is pressed in still from reactor top through the first three-way valve, the second three-way valve from buffering pot bottom;
4., close the 3rd valve, the second three-way valve is switched to " ┤ " state, the first three-way valve switches to " ├ " state, the material of reactor will enter in surge tank again;
5., the first three-way valve is switched to " ┬ " state, the second three-way valve switches to " ┬ " state, opens the 6th valve, makes to form normal pressure in surge tank, slowly opens the 5th valve sampling;
6., after sampling, successively close the 5th valve and the 6th valve, the second three-way valve is switched to " ┴ " state, open the 3rd valve, pass into air material remaining in surge tank is pressed in still from reactor top from bottom the first three-way valve, second three-way valve of surge tank;
7., close the 3rd valve, the second three-way valve is switched to " ┬ " state, complete primary sample operation.
The reinforced purposes of above-mentioned sampling feeding device, comprises the following steps that order is joined:
1., close the second valve, the 3rd valve, the 4th valve and the 5th valve, open the first valve and the 6th valve, make the first three-way valve and the second three-way valve all in " ┬ " state;
2., solid solubility material is added in surge tank from aggregate bin;
3., close the 6th valve, the second three-way valve is switched to " ┤ " state, the first three-way valve switches to " ├ " state, passes into reaction mass from reactor to surge tank, dissolves the solid solubility material that adds;
4., the first three-way valve is switched to " ┬ " state, regulate the aperture of the 4th valve, to blowing air in surge tank, the dissolution velocity of accelerating solid solubility material;
5., after solid material all dissolves, close the 4th valve, the second three-way valve is switched to " ┴ " state, open the 3rd valve, material in surge tank is pressed in still from reactor top from bottom the first three-way valve, second three-way valve of surge tank;
6., repeat above-mentioned steps to required quality, close the 3rd valve, the second three-way valve switches to " ┬ " state, completes once reinforced operation.
In the application, " ┴ " refers to: upper, left and right three direction conductings of three-way valve, not conducting downwards; " ┬ " refers to: under three-way valve, left and right three direction conductings, and upwards not conducting; " ┤ " refers to: upper and lower, left three direction conductings of three-way valve, not conducting to the right; " ├ " refers to: upper and lower, right three direction conductings of three-way valve, not conducting left.
The NM technology of the utility model is prior art.
The utility model sampling feeding device tool has the following advantages: 1, integrate sampling and feeding device, operating personnel up and down floor run, easy to operate, have alleviated labour intensity; 2, can carry out negative pressure, normal pressure, the sampling of malleation reactor, the actual production of the many kinds of work order still that are applicable to become more meticulous, practicality is high; 3, can in course of reaction, sample, without parking, the operations such as pressure release, have reduced energy consumption and have saved the time, have also avoided because of sampling or the reinforced quality that affects product; 4, on reactor, can establish multiple sample points, the sample of taking-up is representative; 5, the clout of ducted residual material and middle control laboratory sampling can return in reactor in time, reduces loss of material and waste disposal burden, has alleviated environmental pollution; 6, utilize surge tank reinforced, avoided operating personnel directly to contact with effumability reaction mass, alleviated the injury to human body; 7, the use of the upper gas pressure reducer of Compressed Gas supervisor, has increased the security of device; 8, the polishing of surge tank inside and bottom conical design have avoided solid material to glue wall; 9, while adding soluble solids material, passing into of surge tank inner bottom part micro-air, has played the effect of stirring, and makes faster and better being dissolved in reaction mass of solid material energy; 10, soluble solids material is pressed into the feed way of reaction after dissolving, and has guaranteed that solid material can as much as possible all add in reactor, has ensured the safety of reaction, yield and the quality of product; 11, the use of tee ball valve, has reduced the dead angle existing in binder process, has reduced the quantity of valve in device simultaneously, makes operation more easy, quick; 12, the use of visor, allows operation become visual.Be the shortcoming that the utility model device has solved traditional sampling feed way, easy and simple to handle, simple, safety, environmental protection, practicality is high, is applicable to fine chemistry industry reactor, distillation, essence and the device such as stays.
Brief description of the drawings
Fig. 1 is the utility model sampling feeding device structural representation.
In figure, 1 is gas pressure reducer, 2 is the 3rd valve, 3 is the second check-valves, 4 is reduced pipe, 5 is the 4th valve, 6 is the first check-valves, 7 is the 6th valve, 8 is the first valve, 9 is compressed gas tube, 10 is the second pipeline, 11 is the first three-way valve, 12 is the second valve, 13 is the second three-way valve, 14 is glass visor, 15 is the 5th valve, 16 is aciculiform ball valve, 17 is sheet frame visor, 18 is positive/negative pressure double-range Pressure gauge, 19 is aggregate bin, 20 is the first pipeline, 21 is the first branch road, 22 is the second branch road, 23 is the 3rd pipeline, 24 is surge tank, 25 is reactor, 26 is emptying or vacuum, 27 is subsequent processing.
Detailed description of the invention
In order to understand better the utility model, further illustrate content of the present utility model below in conjunction with embodiment, but content of the present utility model is not only confined to the following examples.
Sampling feeding device as shown in Figure 1, comprises reactor, surge tank, the first pipeline, the second pipeline, the 3rd pipeline and compressed gas tube; The position of reactor is higher than surge tank;
First pipeline one end is communicated with reactor, and the other end leads to surge tank, and one end that the first pipeline is communicated with reactor is provided with three and the first ball valve of connecting, and one end that the first pipeline leads to surge tank is provided with the second ball valve;
Second pipeline one end is communicated with surge tank bottom, the other end is communicated with reactor top, the second pipeline and the first pipeline cross between the first ball valve and the second ball valve, the intersection of the second pipeline and the first pipeline is provided with the first tee ball valve, the second pipeline between the first tee ball valve and surge tank is provided with discharging opening, and discharging opening is provided with the 5th ball valve;
The 3rd pipeline one end is communicated with surge tank top, the second pipeline connection between the other end and the second ball valve and reactor, and connectivity part is provided with the second tee ball valve;
Compressed gas tube one end is house steward, and the other end branches into the first branch road and the second branch road, and the first branch road and the 3rd pipeline connection on the first branch road, leading in the direction of the 3rd pipeline, are provided with the 3rd ball valve and the second check-valves successively; The second branch road is communicated with surge tank bottom, on the second branch road, in the direction of leading to surge tank, is provided with successively reduced pipe, the 4th ball valve and the first check-valves;
The top of surge tank, be provided with successively the 6th ball valve and the aggregate bin being communicated with surge tank from top to bottom, aggregate bin be positioned at the second ball valve under.
The house steward of compressed gas tube is provided with gas pressure reducer.
The inside of surge tank is smooth mirror surface, and the bottom of surge tank is conical structure, and surge tank is provided with sheet frame visor; Second pipeline of one end of close surge tank is provided with glass visor, and glass visor is between surge tank and the first tee ball valve.
The sampling purposes of sampling feeding device, the sampling method of normal pressure or malleation, comprises the following steps that order is joined:
1., close the second ball valve, the 3rd ball valve, the 4th ball valve and the 5th ball valve, open the first ball valve and the 6th ball valve, make the first tee ball valve in " ┴ " state, the second tee ball valve is in " ┤ " state;
2., before sampling, can be chemically examined to unnecessary sample last time and pour in aggregate bin, flowed in surge tank through the 6th ball valve; Slowly open again the second ball valve Liquid Residue is put into surge tank; From sheet frame visor, observe and reach after certain liquid level, slowly open the second ball valve, the material flowing out from the second ball valve falls into surge tank through aggregate bin, and in the first pipeline, residual material all falls into after surge tank, samples with sampling bottle on aggregate bin;
3., sampling after, close the second ball valve;
4., all fall into after surge tank until material in aggregate bin, close the 6th ball valve, the first tee ball valve is switched to " ┬ " state, the second tee ball valve switches to " ┴ " state, and by the material in surge tank, glass visor, the first tee ball valve, the second tee ball valve from bottom second pipeline of surge tank is pressed in reactor from reactor top by passing into the Compressed Gas of compressed gas tube to open the 3rd ball valve;
5., close the 3rd ball valve, the second tee ball valve is switched to " ┬ " state, complete primary sample operation.
The sampling method of negative pressure, comprises the following steps that order is joined:
1., close the second ball valve, the 3rd ball valve, the 4th ball valve, the 5th ball valve and the 6th ball valve, open the first ball valve, make the second tee ball valve in " ┤ " state;
2., the first tee ball valve switches to " ├ " state, now surge tank equates with the air pressure in reactor, because the material in liquid level difference reactor will flow into surge tank from buffering pot bottom through the first ball valve, the first tee ball valve;
3., observe after liquid level reach a certain height by sheet frame visor, the first tee ball valve is switched to " ┬ " state; The second tee ball valve is switched to " ┴ " state, open the 3rd ball valve and pass into air, be greater than the air pressure in reactor because passing into of air makes air pressure in surge tank, thereby the material in surge tank is pressed in still from reactor top through glass visor, the first tee ball valve, the second tee ball valve from buffering pot bottom;
4., until observe in pipeline without material by glass visor after, close the 3rd ball valve, the second tee ball valve is switched to " ┤ " state, the first tee ball valve switches to " ├ " state, the material of reactor will enter in surge tank again;
5., the first tee ball valve is switched to " ┬ " state, the second tee ball valve switches to " ┬ " state, opens the 6th ball valve, makes to form normal pressure in surge tank, slowly opens the 5th ball valve sampling;
6., after sampling, successively close the 5th ball valve and the 6th ball valve, the second tee ball valve is switched to " ┴ " state, open the 3rd ball valve, pass into air material remaining in surge tank is pressed in still from reactor top from bottom the first tee ball valve, second tee ball valve of surge tank;
7., close the 3rd ball valve, the second tee ball valve is switched to " ┬ " state, complete primary sample operation.
The reinforced purposes of sampling feeding device, comprises the following steps that order is joined:
1., close the second ball valve, the 3rd ball valve, the 4th ball valve and the 5th ball valve, open the first ball valve and the 6th ball valve, make the first tee ball valve and the second tee ball valve all in " ┬ " state;
2., solid solubility material is added in surge tank from aggregate bin;
3., close the 6th ball valve, the second tee ball valve is switched to " ┤ " state, the first tee ball valve switches to " ├ " state, passes into reaction mass from reactor to surge tank, dissolves the solid solubility material that adds;
4., after reaching a certain height by the liquid level in sheet frame visor observation surge tank, the first tee ball valve is switched to " ┬ " state, regulate the aperture of the 4th ball valve, to blowing air in surge tank, the dissolution velocity (dissolving of accelerating solid solubility material) of accelerating solid solubility material;
5., after solid material all dissolves, close the 4th ball valve, the second tee ball valve is switched to " ┴ " state, open the 3rd ball valve, material in surge tank is pressed in still from reactor top from bottom the first tee ball valve, second tee ball valve of surge tank;
6., repeat above-mentioned steps to required quality, close the 3rd ball valve, the second tee ball valve switches to " ┬ " state, completes once reinforced operation.
Claims (7)
1. a sampling feeding device, is characterized in that: comprise reactor, surge tank, the first pipeline, the second pipeline, the 3rd pipeline and compressed gas tube; The position of reactor is higher than surge tank;
First pipeline one end is communicated with reactor, and the other end leads to surge tank, and one end that the first pipeline is communicated with reactor is provided with the first valve, and one end that the first pipeline leads to surge tank is provided with the second valve;
Second pipeline one end is communicated with surge tank bottom, the other end is communicated with reactor top, the second pipeline and the first pipeline cross between the first valve and the second valve, the intersection of the second pipeline and the first pipeline is provided with the first three-way valve, the second pipeline between the first three-way valve and surge tank is provided with discharging opening, and discharging opening is provided with the 5th valve;
The 3rd pipeline one end is communicated with surge tank top, the second pipeline connection between the other end and the second valve and reactor, and connectivity part is provided with the second three-way valve;
Compressed gas tube one end is house steward, and the other end branches into the first branch road and the second branch road, the first branch road and the 3rd pipeline connection, and the first branch road is provided with the 3rd valve; The second branch road is communicated with surge tank bottom, and the second branch road is provided with the 4th valve;
The top of surge tank, be provided with successively the 6th valve and the aggregate bin being communicated with surge tank from top to bottom, aggregate bin be positioned at the second valve under.
2. sampling feeding device as claimed in claim 1, is characterized in that: the house steward of compressed gas tube is provided with gas pressure reducer.
3. sampling feeding device as claimed in claim 1 or 2, is characterized in that: on the second branch road, in the direction of leading to surge tank, be provided with successively reduced pipe, the 4th valve and the first check-valves.
4. sampling feeding device as claimed in claim 1 or 2, is characterized in that: on the first branch road, leading in the direction of the 3rd pipeline, be provided with successively the 3rd valve and the second check-valves.
5. sampling feeding device as claimed in claim 1 or 2, is characterized in that: the inside of surge tank is smooth mirror surface, and the bottom of surge tank is conical structure, and surge tank is provided with sheet frame visor.
6. sampling feeding device as claimed in claim 1 or 2, is characterized in that: second pipeline of one end of close surge tank is provided with glass visor, and glass visor is between surge tank and the first three-way valve.
7. sampling feeding device as claimed in claim 1 or 2, is characterized in that: one end that the first pipeline is communicated with reactor is provided with two the first above and connect valves, and two the first valves above and that connect are communicated with the differing heights of reactor respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320749878.6U CN203648495U (en) | 2013-11-25 | 2013-11-25 | Sampling and charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320749878.6U CN203648495U (en) | 2013-11-25 | 2013-11-25 | Sampling and charging device |
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| CN203648495U true CN203648495U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320749878.6U Expired - Fee Related CN203648495U (en) | 2013-11-25 | 2013-11-25 | Sampling and charging device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564645A (en) * | 2014-11-28 | 2015-04-29 | 江门谦信化工发展有限公司 | Buffer device for flow rate of positive displacement pump |
| CN105126699A (en) * | 2015-09-07 | 2015-12-09 | 发基化学品（张家港）有限公司 | Reactor feeding proportion adjusting control device |
| CN106512864A (en) * | 2016-12-29 | 2017-03-22 | 杭州油脂化工有限公司 | Intermittent hydrogenation safety discharging device and safety discharging method |
-
2013
- 2013-11-25 CN CN201320749878.6U patent/CN203648495U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564645A (en) * | 2014-11-28 | 2015-04-29 | 江门谦信化工发展有限公司 | Buffer device for flow rate of positive displacement pump |
| CN105126699A (en) * | 2015-09-07 | 2015-12-09 | 发基化学品（张家港）有限公司 | Reactor feeding proportion adjusting control device |
| CN106512864A (en) * | 2016-12-29 | 2017-03-22 | 杭州油脂化工有限公司 | Intermittent hydrogenation safety discharging device and safety discharging method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20211125 |
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| CF01 | Termination of patent right due to non-payment of annual fee |