CN211946874U - Continuous production system for zinc dibutyl dithiocarbamate - Google Patents
Continuous production system for zinc dibutyl dithiocarbamate Download PDFInfo
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- CN211946874U CN211946874U CN202020216991.8U CN202020216991U CN211946874U CN 211946874 U CN211946874 U CN 211946874U CN 202020216991 U CN202020216991 U CN 202020216991U CN 211946874 U CN211946874 U CN 211946874U
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Abstract
The utility model relates to the technical field of zinc dibutyl dithiocarbamate production, in particular to a zinc dibutyl dithiocarbamate continuous production system, which comprises a first pipeline reactor, a second pipeline reactor, a third pipeline reactor, a condensation reaction tank, a flash tank, a double decomposition reaction tank and a filter press which are sequentially communicated; the pipeline reactor I, the pipeline reactor II and the pipeline reactor three are used for material mixing; the condensation reaction tank is used for carrying out condensation reaction on condensation liquid, the flash tank is used for carrying out flash evaporation on materials discharged from the condensation reaction tank, the double decomposition reaction tank is used for carrying out double decomposition reaction on the materials discharged from the bottom of the flash tank, mother liquor of the filter press and zinc sulfate, and the filter press is used for dewatering the materials discharged from the double decomposition reaction tank. The utility model discloses change intermittent type production into serialization production, the unit interval production volume improves by a wide margin, and manufacturing cost is showing and is reducing.
Description
Technical Field
The utility model relates to a zinc dibutyl dithiocarbamate production technical field, concretely relates to zinc dibutyl dithiocarbamate serialization production system.
Background
Zinc dibutyldithiocarbamate is an effective peroxide decomposer, often used in combination with a primary antioxidant for polypropylene, polyvinyl chloride. Zinc dibutyldithiocarbamate is also used as a rubber adhesive and a latex cure accelerator. Zinc dibutyldithiocarbamate is also a super accelerator for natural, synthetic and latex.
The production of zinc dibutyldithiocarbamate (BZ) is mostly intermittent production, namely, mixing, condensation and double decomposition reaction are carried out in a reaction kettle, and the reaction is finished and is dehydrated in a centrifuge to prepare a wet product, so that the method has the advantages of long time, low efficiency, much interference of human factors and unstable quality.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the problem and the not enough of above-mentioned existence, provide a zinc dibutyl dithiocarbamate serialization production system, can produce zinc dibutyl dithiocarbamate (BZ) in succession, degree of automation is high, improves production efficiency, reduction in production cost by a wide margin.
In order to realize the purpose of the utility model, the technical proposal of the utility model is that:
a continuous production system of zinc dibutyl dithiocarbamate comprises a first pipeline reactor, a second pipeline reactor, a third pipeline reactor, a condensation reaction tank, a flash tank, a double decomposition reaction tank and a filter press which are sequentially communicated;
the first pipeline reactor is used for premixing liquid caustic soda and washing water, the second pipeline reactor is used for mixing a material discharged from the first pipeline reactor with di-n-butylamine, and the third pipeline reactor is used for mixing a material discharged from the second pipeline reactor with carbon disulfide;
the condensation reaction tank is used for carrying out condensation reaction on the materials discharged from the third pipeline reactor, the flash tank is used for carrying out flash evaporation on the materials discharged from the condensation reaction tank, the double decomposition reaction tank is used for carrying out double decomposition reaction on the materials discharged from the bottom of the flash tank, mother liquor of the filter press and zinc sulfate, and the filter press is used for dewatering the materials discharged from the double decomposition reaction tank.
Further, in the continuous production system of zinc dibutyldithiocarbamate, an inlet of the first pipeline reactor is respectively communicated with outlets of a liquid caustic soda pump and a washing water pump, an inlet of the liquid caustic soda pump is communicated with an outlet of a liquid caustic soda metering tank, and an inlet of the washing water pump is communicated with an outlet of a washing water metering tank;
the inlet of the pipeline reactor II is also communicated with the outlet of a di-n-butylamine pump, and the inlet of the di-n-butylamine pump is communicated with the outlet of a di-n-butylamine metering tank;
the inlet of the pipeline reactor III is also communicated with the outlet of a carbon disulfide metering pump, and the inlet of the carbon disulfide metering pump is communicated with a carbon disulfide metering tank;
the double decomposition reaction tank is communicated with the outlet of the liquid-liquid multiphase flow pump and the outlet of the zinc sulfate metering pump, the bottom outlet of the flash tank is communicated with a mother liquor pipeline of the filter press, the liquid-liquid multiphase flow pump is used for enabling materials discharged from the bottom of the flash tank and mother liquor of the filter press to react, mix and disperse with zinc sulfate, the double decomposition reaction tank is communicated with the outlet of the liquid-liquid multiphase flow pump and the outlet of the zinc sulfate metering pump, and the inlet of the zinc sulfate metering pump is communicated with the outlet of the zinc sulfate metering tank.
Further, in the continuous production system of zinc dibutyldithiocarbamate, the outlet of the liquid caustic soda pump is provided with a first adjusting valve, and the first adjusting valve is interlocked with a first PH meter at the second rear of the pipeline reactor.
Further, in the continuous production system of zinc dibutyldithiocarbamate, a second PH meter is arranged in the double decomposition reaction tank, and the second PH meter is interlocked with a second adjusting valve at the outlet of the zinc sulfate metering pump.
Further, in the continuous production system of zinc dibutyldithiocarbamate, a condensation liquid heater is connected between the condensation reaction tank and the flash tank, and the condensation liquid heater is used for heating the material coming out of the condensation liquid reaction tank.
Further, in the continuous production system of zinc dibutyldithiocarbamate, a mixed liquid heater is connected between the flash tank and the liquid-liquid multiphase pump, and the mixed liquid heater is used for heating the material from the bottom of the flash tank and the mother liquid of the filter press.
Further, in the continuous production system of zinc dibutyldithiocarbamate, a spiral spray head is arranged in the flash tank.
Further, in the continuous production system of zinc dibutyldithiocarbamate, the top of the flash tank is connected with a condenser through a pipeline, and a gas phase outlet of the condenser is provided with a water seal tank.
Further, in foretell zinc dibutyldithiocarbamate serialization production system, the metathesis reaction groove includes a plurality of cell bodies, all is equipped with the (mixing) shaft in every cell body, and adjacent cell body adopts the baffle to separate, the baffle includes left baffle and the right baffle that the interval certain distance set up, left side baffle with the top of cell body is connected, and with cell body bottom interval certain distance, right side baffle with the bottom of cell body is connected, and with cell body top interval certain distance, the bottom of every cell body all is equipped with the discharge gate.
Further, in the continuous production system of zinc dibutyldithiocarbamate, a safety valve is connected to the top of the condensation reaction tank, and the safety valve is communicated with the metathesis reaction tank through a pipeline.
The utility model discloses a zinc dibutyl dithiocarbamate serialization production system's beneficial effect:
1. the utility model discloses a zinc dibutyl dithiocarbamate serialization production system changes the intermittent production of zinc dibutyl dithiocarbamate into continuous production, and degree of automation is high, and the unit interval output improves by a wide margin, and manufacturing cost is showing and is reducing;
2. in the zinc dibutyl dithiocarbamate continuous production system, a mixed liquid heater is connected between the flash tank and the liquid-liquid multiphase flow pump, so that the subsequent double decomposition reaction can be quickly reacted;
3. in the zinc dibutyl dithiocarbamate continuous production system, the top of the flash tank is connected with a condenser through a pipeline, so that carbon disulfide evaporated in the flash tank can be condensed and reused, and a gas phase outlet of the condenser is provided with a water seal tank, so that the carbon disulfide can be prevented from flash explosion in the flash condenser;
4. the utility model discloses an among the zinc continuous production system of dibutyl dithiocarbamate, the metathesis reaction groove includes a plurality of cell bodies, and adjacent cell body adopts the baffle to separate, and the baffle includes left baffle and the right baffle that the interval certain distance set up, forms overflow channel between left baffle and the right baffle, can guarantee that material overflow volume is unanimous between the adjacent cell body.
Drawings
Fig. 1 is a schematic structural diagram of a first part of a continuous zinc dibutyldithiocarbamate production system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second part of a continuous zinc dibutyldithiocarbamate production system according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a third part of a continuous zinc dibutyldithiocarbamate production system according to an embodiment of the present invention.
Fig. 4 is a schematic view of a flow structure of a continuous zinc dibutyldithiocarbamate production system according to an embodiment of the present invention.
In the figure: 1 is a di-n-butylamine measuring tank, 2 is a liquid caustic metering tank, 3 is a washing water measuring tank, 4 is a pipeline reactor two, 5 is a first PH meter, 6 is a pipeline reactor one, 7 is a washing water pump, 8 is a liquid caustic pump, 9 is a di-n-butylamine pump, 10 is a pipeline reactor three, 11 is a condensation reaction tank, 12 is a condenser, 13 is a water seal tank, 14 is a flash tank, 15 is a condensation liquid heater, 16 is a carbon disulfide measuring tank, 17 is a carbon disulfide pump, 18 is a left partition plate, 19 is a right partition plate, 20 is a metathesis reaction tank, 21 is a stirring shaft, 22 is a zinc sulfate measuring tank, 23 is a zinc sulfate pump, 24 is a liquid-liquid multiphase pump, 25 is a mixed liquid heater, 26 is a first regulating valve, 27 is a second regulating valve, and 28 is a second PH meter.
Detailed Description
The continuous production system of zinc dibutyldithiocarbamate of the present invention is described in more detail by the following embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1 to 4, the present embodiment discloses a continuous production system of zinc dibutyldithiocarbamate, which includes a first pipeline reactor, a second pipeline reactor, a third pipeline reactor, a condensation reaction tank, a flash tank, a metathesis reaction tank, and a filter press, which are sequentially connected;
the first pipeline reactor is used for premixing liquid caustic soda and washing water from MVR, the second pipeline reactor is used for mixing a material discharged from the first pipeline reactor with excessive di-n-butylamine, the third pipeline reactor is used for mixing a material discharged from the second pipeline reactor with carbon disulfide, the first pipeline reactor and the second pipeline reactor are SV pipeline mixers, the third pipeline reactor is an SL pipeline mixer, and each section is provided with a temperature measuring, pressure measuring and sampling port;
the condensation reaction tank is used for carrying out condensation reaction on materials from the third pipeline reactor, the flash tank is used for carrying out flash evaporation on the materials from the condensation reaction tank, the double decomposition reaction tank is used for carrying out double decomposition reaction on the materials from the flash tank, mother liquor of the filter press and zinc sulfate, the filter press is used for dehydrating the materials from the double decomposition reaction tank, and wet products from the filter press are dried by an air inflow drying system. The embodiment can change the intermittent production of the zinc dibutyl dithiocarbamate into continuous production, has high automation degree, greatly improves the production capacity in unit time, and obviously reduces the production cost.
In this embodiment, preferably, an inlet of the first pipeline reactor is respectively communicated with outlets of a liquid caustic soda pump and a washing water pump, an inlet of the liquid caustic soda pump is communicated with an outlet of a liquid caustic soda metering tank, and an inlet of the washing water pump is communicated with an outlet of the washing water metering tank;
the inlet of the pipeline reactor II is also communicated with the outlet of a di-n-butylamine pump, and the inlet of the di-n-butylamine pump is communicated with the outlet of a di-n-butylamine metering tank;
the inlet of the pipeline reactor III is also communicated with the outlet of a carbon disulfide metering pump, and the inlet of the carbon disulfide metering pump is communicated with a carbon disulfide metering tank;
the inlet of the double decomposition reaction tank is communicated with the outlet of the liquid-liquid multiphase flow pump and the outlet of the zinc sulfate metering pump, the outlet of the bottom of the flash tank is communicated with a mother liquor pipeline of the filter press, the material discharged from the bottom of the flash tank and the mother liquor of the filter press react, are mixed and are dispersed with the zinc sulfate, the inlet of the double decomposition reaction tank is communicated with the outlet of the liquid-liquid multiphase flow pump and the outlet of the zinc sulfate metering pump, and the inlet of the zinc sulfate metering pump is communicated with the outlet of the zinc sulfate metering tank.
In this embodiment, preferably, the outlet of the liquid caustic soda pump is provided with a first regulating valve, and the first regulating valve is interlocked with a first PH meter behind the second pipeline reactor; the double decomposition reaction tank is internally provided with a second PH meter which is interlocked with a second regulating valve at the outlet of the zinc sulfate metering pump, the feeding proportion can be accurately controlled according to the specific PH value, the reaction end point is regulated by adopting a regulating variable, namely liquid alkali is selected as the regulating variable before the condensation reaction, and zinc sulfate is selected as the regulating variable for the double decomposition reaction to produce qualified products in advance.
In this embodiment, preferably, a condensation liquid heater is further connected between the condensation reaction tank and the flash tank, the condensation liquid heater is used for heating the material coming out of the condensation liquid reaction tank, and the heated condensation liquid enters the flash tank to be flashed so as to remove and recycle carbon disulfide in the condensation liquid.
In this embodiment, preferably, a mixed liquid heater is further connected between the flash tank and the liquid-liquid multiphase flow pump, and the mixed liquid heater is used for heating the material discharged from the bottom of the flash tank and the mother liquid of the filter press, so that a subsequent double decomposition reaction can be rapidly reacted, the mother liquid of the filter press is connected into a production system for cyclic utilization, the product utilization rate can be improved, and the production cost can be reduced.
In this embodiment, preferably, for the excessive carbon disulfide of flash evaporation, set up the spiral nozzle in the flash tank, increase the flash evaporation area, the carbon disulfide in the condensation liquid can be evaporated in the flash tank rapidly in the flash tank by the flash evaporation fast.
In this embodiment, preferably, there is the condenser at the top of flash tank through the pipe connection, can be with the carbon disulfide condensation retrieval and utilization of evaporation in the flash tank to improve product utilization, for avoiding carbon disulfide to flash explosion in the condenser, be provided with the water seal groove in the gaseous phase export of condenser.
In this embodiment, preferably, the double decomposition reaction tank includes a plurality of cell bodies, all is equipped with the (mixing) shaft in every cell body, and adjacent cell body adopts the baffle to separate, and the baffle includes left baffle and the right baffle that the interval certain distance set up, and left baffle is connected with the top of cell body, and with cell body bottom interval certain distance, right baffle is connected with the bottom of cell body, and with cell body top interval certain distance, the bottom of every cell body all is equipped with the discharge gate. An overflow channel is formed between the left partition plate and the right partition plate, so that the consistency of material overflow amount between adjacent groove bodies can be ensured.
In this embodiment, preferably, a safety valve is connected to the top of the condensation reaction tank, the safety valve is communicated with the metathesis reaction tank through a pipeline, and when the pressure in the safety valve is too high, the safety valve has an emergency discharge function. Because the carbon disulfide in the condensation reaction tank is excessive, the electrostatic explosion is very easy to cause, therefore, the safety valve is arranged and the nitrogen is filled for protection, and the upper layer of nitrogen has the buffer effect besides the protection effect, so that the pressure interlock at the outlet is kept stable, and the instability of the regulating valve at the outlet caused by the fluctuation of the liquid pressure and the flow of the full tank is avoided. Because the condensation reaction is slow, the condensation reaction tank is designed according to the designed productivity and the residence time, and simultaneously, the product quality is prevented from being damaged by the back mixing phenomenon to the maximum extent.
The process for preparing zinc dibutyldithiocarbamate by the continuous zinc dibutyldithiocarbamate production system in this example is as follows:
1. mixing materials: a. firstly, liquid caustic soda and washing water enter a first pipeline reactor for premixing, wherein a centrifugal pump is used as a liquid caustic soda pump, a first regulating valve is arranged at an outlet and is interlocked with a first PH meter behind a second pipeline reactor to control the PH value, a metering pump is used as a washing water pump, and a damper and a back pressure valve are arranged at the outlet for eliminating pulsation and accurately metering; b. mixing the material at the outlet of the first pipeline reactor with di-n-butylamine, and feeding the mixture into a second pipeline reactor, wherein a metering pump is used as a di-n-butylamine pump, and a damper and a back pressure valve are arranged at the outlet of the second pipeline reactor, so that the metering is accurate; mixing the material at the outlet of the pipeline reactor II with carbon disulfide, and feeding the mixture into a pipeline reactor III, wherein the carbon disulfide uses a metering pump, and the outlet is provided with a damper and a back pressure valve, so that the metering is accurate;
2. condensation reaction: filling a certain amount of nitrogen into the condensation reaction tank, reacting the condensation liquid from the pipeline reactor III in the condensation reaction tank from top to bottom to avoid back mixing, arranging a pressure regulating valve at an outlet, and controlling the liquid level in the condensation reaction tank through pressure conversion;
3. flash evaporation: heating the condensation liquid by a heater, flashing in a flash tank, regulating the steam consumption by the temperature entering the flash tank, and finally condensing and recycling by a condenser communicated with the top of the flash tank;
4. and (3) heating: in order to make the subsequent double decomposition reaction quickly react, the material from the bottom of the flash tank and the mother liquor of the filter press are heated by a mixing heater;
5. dispersing: reacting, mixing and dispersing the condensation liquid and zinc sulfate in a pump head by adopting a liquid-liquid multiphase flow pump, wherein the adding amount of the zinc sulfate is controlled by a second regulating valve interlocked with a second PH meter in a first tank in a double decomposition reaction tank;
6. double decomposition reaction: the method comprises the steps that materials coming from a multiphase flow pump enter a first double decomposition reaction tank to continue reacting, a stirring shaft in the double decomposition reaction tank is used for forcibly mixing and dispersing, if the materials react in the first double decomposition reaction tank to a qualified end point, discharging is carried out from the bottom of the first double decomposition reaction tank, if the materials do not reach the qualified end point in the first double decomposition reaction tank, the materials overflow to a tank body behind the first double decomposition reaction tank to continue reacting, and the pH value of a second pH meter in the tank body behind the first tank is used for controlling the adding amount of zinc sulfate from a zinc sulfate pump until the pH value reaches the qualified end point of the reaction.
7. And (3) conveying the materials qualified in the reaction in the double decomposition reaction tank to a filter press for filter pressing, drying the generated wet products by a spiral material pushing and air inlet flow drying system, and packaging the dried wet products after sieving to obtain finished products.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and changes may be made to the specific embodiments without departing from the concept of the present invention, and various combinations of the technical features and structures of the present invention may be implemented without departing from the scope of the present invention.
Claims (10)
1. A continuous production system of zinc dibutyl dithiocarbamate is characterized by comprising a first pipeline reactor, a second pipeline reactor, a third pipeline reactor, a condensation reaction tank, a flash tank, a double decomposition reaction tank and a filter press which are sequentially communicated;
the first pipeline reactor is used for premixing liquid caustic soda and washing water, the second pipeline reactor is used for mixing a material discharged from the first pipeline reactor with di-n-butylamine, and the third pipeline reactor is used for mixing a material discharged from the second pipeline reactor with carbon disulfide;
the condensation reaction tank is used for carrying out condensation reaction on the materials discharged from the third pipeline reactor, the flash tank is used for carrying out flash evaporation on the materials discharged from the condensation reaction tank, the double decomposition reaction tank is used for carrying out double decomposition reaction on the materials discharged from the bottom of the flash tank, mother liquor of the filter press and zinc sulfate, and the filter press is used for dewatering the materials discharged from the double decomposition reaction tank.
2. The continuous production system of zinc dibutyldithiocarbamate according to claim 1, wherein an inlet of the first pipeline reactor is respectively communicated with outlets of a liquid caustic soda pump and a washing water pump, an inlet of the liquid caustic soda pump is communicated with an outlet of a liquid caustic metering tank, and an inlet of the washing water pump is communicated with an outlet of a washing water metering tank;
the inlet of the pipeline reactor II is also communicated with the outlet of a di-n-butylamine pump, and the inlet of the di-n-butylamine pump is communicated with the outlet of a di-n-butylamine metering tank;
the inlet of the pipeline reactor III is also communicated with the outlet of a carbon disulfide metering pump, and the inlet of the carbon disulfide metering pump is communicated with a carbon disulfide metering tank;
the double decomposition reaction tank is communicated with the outlet of the liquid-liquid multiphase flow pump and the outlet of the zinc sulfate metering pump, the bottom outlet of the flash tank is communicated with a mother liquor pipeline of the filter press, the liquid-liquid multiphase flow pump is used for enabling materials discharged from the bottom of the flash tank and mother liquor of the filter press to react, mix and disperse with zinc sulfate, the double decomposition reaction tank is communicated with the outlet of the liquid-liquid multiphase flow pump and the outlet of the zinc sulfate metering pump, and the inlet of the zinc sulfate metering pump is communicated with the outlet of the zinc sulfate metering tank.
3. The continuous production system of zinc dibutyldithiocarbamate according to claim 2, wherein the outlet of the liquid caustic soda pump is provided with a first adjusting valve, and the first adjusting valve is interlocked with a first PH meter at the second rear of the pipeline reactor.
4. The continuous production system of zinc dibutyldithiocarbamate according to claim 2, wherein a second PH meter is provided in the metathesis reaction tank, and the second PH meter is interlocked with a second adjusting valve of the zinc sulfate metering pump outlet.
5. The continuous production system of zinc dibutyldithiocarbamate according to claim 1, wherein a condensation heater is further connected between the condensation reaction tank and the flash tank, and the condensation heater is used for heating the material from the condensation reaction tank.
6. The continuous production system of zinc dibutyldithiocarbamate according to claim 2, wherein a mixed liquor heater is further connected between the flash tank and the liquid-liquid multiphase pump, and the mixed liquor heater is used for heating the material from the bottom of the flash tank and the mother liquor of the filter press.
7. The continuous production system of zinc dibutyldithiocarbamate according to claim 1, wherein a spiral spray head is provided in the flash tank.
8. The continuous production system of zinc dibutyldithiocarbamate according to claim 1, wherein a condenser is connected to the top of the flash tank through a pipeline, and a water-sealed tank is provided at a gas phase outlet of the condenser.
9. The continuous production system of zinc dibutyldithiocarbamate according to claim 1, wherein the double decomposition reaction tank comprises a plurality of tank bodies, each tank body is provided with a stirring shaft, adjacent tank bodies are separated by a partition plate, the partition plate comprises a left partition plate and a right partition plate which are arranged at a certain interval, the left partition plate is connected with the top of the tank body and is at a certain interval with the bottom of the tank body, the right partition plate is connected with the bottom of the tank body and is at a certain interval with the top of the tank body, and the bottom of each tank body is provided with a discharge hole.
10. The continuous production system of zinc dibutyldithiocarbamate according to claim 1, wherein a safety valve is connected to a top of the condensation reaction tank, and the safety valve is communicated with the metathesis reaction tank through a pipeline.
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