CN215139703U - Laboratory leads to chlorine reaction unit - Google Patents

Abstract

The utility model relates to a chemistry lab scale test/pilot scale equipment field relates to a chlorine reaction unit is led to in laboratory particularly. Including liquid chlorine steel bottle, electronic scale and the vaporizer that connects gradually, flow controller, a reactor, exhaust treatment device, come the speed of control letting in chlorine with gas flow controller, come the total amount of measurement logical chlorine with electronic scale, the chlorination degree that can accurate control logical chlorine reaction, it is inhomogeneous to have solved logical chlorine speed, it is inaccurate to lead to chlorine volume, the problem of impurity is produced easily to the chlorination degree not good control, in addition, device reasonable in design, easy operation, each part replaceability is high, can enough guarantee the reliability of self function, again can install according to laboratory condition and reaction demand at any time and build, especially adapted laboratory scale's application.

Description

Laboratory leads to chlorine reaction unit

Technical Field

The utility model relates to a chemistry lab scale/pilot scale equipment field, especially a chlorine reaction unit is led to in laboratory.

Background

The chlorination reaction is a reaction process common in chemical experiments, and is generally an exothermic reaction. The chlorine has high reaction activity, is easy to generate multi-substitution reaction with hydrogen on benzene ring of organic matter, and how to control the speed and the total amount of the introduced chlorine is the key for controlling the reaction process of chlorine introduction experiments. In the chlorination reaction in the laboratory, concentrated hydrochloric acid is generally oxidized by an oxidizing agent to prepare chlorine, the chlorine needs to be prepared and used at present, the generated chlorine also needs to be dried, and the method has difficulty in accurately controlling the output rate of the chlorine and increases the complexity and the danger of the experiment.

In order to solve the problem, researchers in scientific research institutions and enterprises are continuously exploring and researching to find a more advanced chlorine introducing device, and although certain progress is made, the technical problem which is not overcome in practical application still exists.

Disclosure of Invention

The invention aims to overcome the defects, and provides a laboratory chlorine introducing reaction device which is reasonable in design, easy to operate, safe and environment-friendly, and can be used for filling liquid chlorine/chlorine gas by using a steel cylinder through optimizing the device, gasifying the liquid chlorine/chlorine gas in the steel cylinder through a vaporizer, controlling the rate of introducing the chlorine gas by using a gas flow controller, metering the total amount of introduced chlorine by using an electronic scale, accurately controlling the chlorination degree of chlorine introducing reaction, solving the problems of uneven chlorine introducing rate, inaccurate chlorine introducing amount metering, difficult control of the chlorination degree and easy generation of impurities, and improving the yield and the product quality; in addition, the steel cylinder stores chlorine, is not easy to leak, can be used at any time, and is safe and convenient.

The technical scheme adopted by the invention for solving the technical problems is as follows: a laboratory chlorine reaction device comprises a liquid chlorine steel bottle, an electronic scale, a vaporizer, a flow controller, a reactor and a waste gas treatment device, wherein the liquid chlorine steel bottle is placed on the electronic scale, a valve is arranged at the outlet of the liquid chlorine steel bottle, the liquid chlorine steel bottle is connected with one end of the vaporizer through a pipeline, the other end of the vaporizer is connected with the flow controller, and the flow controller is connected with a chlorine pipeline on the reactor; and a gas outlet is arranged at the upper part of the reaction kettle and is connected with a waste gas treatment device through a pipeline.

Preferably, the vaporizer is a 30-60 ℃ low-temperature water bath vaporizer, and the vaporizer has high heat exchange capacity and stable pressure. The air supply volume is sufficient, can satisfy the demand of the required chlorine volume of experiment reaction, also can effectively avoid because of the too high intensity that arouses of vaporization temperature is high, not easy control scheduling problem, in addition, the higher corrosivity to vaporizer itself of temperature is big, destroys the pipeline easily, has increased the cost of plant maintenance.

The gas flowmeter may be a volumetric flowmeter, a rotor flowmeter, a turbine flowmeter, or the like, which is capable of accurately measuring the flow rate of chlorine gas, and is not particularly limited herein.

The reactor is provided with a gas inlet and a gas outlet, and the chlorine pipeline is inserted into the bottom of the reactor through the gas inlet so as to fully mix chlorine and materials. The reactor can adopt chlorination reactors with various structures, such as a kettle type reactor, a tubular reactor, a loop reactor and the like which can meet the requirement of chlorination reaction; the reactor material can be glass, steel or metal material with corrosion-resistant lining. The reactor can be an integrated reactor with a temperature control function, and can also be an independent reactor matched with a temperature control device for use, and the reactor is matched with temperature control devices such as a water bath kettle, a heating jacket and the like for use so as to meet the required conditions of chlorination reaction.

Preferably, the reactor is also provided with a stirring device, the stirring device can be carried by the reactor and also can be built according to laboratory conditions, the stirring rod material can be polytetrafluoroethylene, glass, stainless steel and the like, the contact area of chlorine and reaction liquid can be enlarged, the reaction time is prolonged, and the chlorination reaction is more sufficient.

The waste gas treatment device is a container filled with waste gas washing liquid and used for removing organic waste gas in chlorination reaction, a wet alkali liquor neutralization absorption method or a mode of combining with catalytic oxidation washing can be adopted, the device is simple, the cost is low, the purification effect is good, the alkali liquor is sodium carbonate or sodium bicarbonate solution, and the catalytic oxidation washing liquid is sodium hypochlorite solution.

The invention has the beneficial effects that: the consumption of chlorine in the reaction is accurately controlled in a mode of combining the electronic scale and the flow controller, the waste of the chlorine is avoided, the reaction rate is controlled, the yield is improved, and the generation of impurities is reduced. In addition, this lead to chlorine device simple structure, each part replaceability is high, can enough guarantee the reliability of self function, can install at any time according to laboratory condition and reaction demand again and build, and the application of especially adapted laboratory scale.

Drawings

FIG. 1 is a schematic structural view of the laboratory chlorine reaction device of the present invention.

In fig. 1: 1. a liquid chlorine steel cylinder; 2. an electronic scale; 3. a vaporizer; 4. a chlorine gas control flow meter; 5. a reaction flask; 6. and (5) washing the bottle by gas.

Detailed Description

The present invention will be further described in detail with reference to specific embodiments, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the present invention is not limited to the following embodiments.

A chlorine reaction device for a laboratory comprises an electronic scale 2, a liquid chlorine steel bottle 1, a vaporizer 3, a flow controller 4, a reaction flask 5 and a gas washing bottle 6 which are connected in sequence.

As shown in fig. 1, a liquid chlorine steel cylinder 1 is placed on an electronic scale 2; and a valve is arranged at the outlet of the liquid chlorine steel cylinder 1 and used for controlling the chlorine flow. The liquid chlorine steel cylinder 1 is connected with the inlet of the vaporizer 3 through a pipeline; the vaporizer is a low-temperature water bath vaporizer with the temperature of 30-60 ℃, has high heat exchange amount, stable pressure and sufficient air supply amount, can meet the requirement of chlorine amount required by laboratory reaction, and can effectively avoid the problems of high strength, difficult control and the like caused by overhigh vaporization temperature.

The outlet of the vaporizer 3 is connected with the bottom of the flow controller 4; the top of the flow controller 4 is connected with a chlorine inlet pipe on the reaction flask 5 through a pipeline, the chlorine inlet pipe is inserted into the bottom of the reaction flask 5, so that chlorine gas is difficult to diffuse to a reaction tank under the blocking effect of the chlorine inlet pipe, and the chlorine gas is intensively reacted with reaction liquid, thereby improving the reaction efficiency.

The reaction flask 5 is placed in a water bath kettle, and the water bath kettle can control the reaction temperature in the reaction flask 5. A polytetrafluoroethylene stirring device is arranged at the top of the reaction flask 5, the contact area of chlorine and reaction liquid is enlarged through stirring, the reaction time is prolonged, and the chlorination reaction is more sufficient. The top of the reaction flask 5 is also provided with a gas outlet which is connected with the gas washing bottle 6 through a gas outlet pipeline, gas after reaction is discharged into the gas washing bottle 6 in time through the gas outlet pipeline, and the chlorination reaction is an exothermic reaction, so that potential safety hazards and the like caused by rapid temperature rise due to pressure build-up of the reaction flask 5 can be effectively avoided.

The gas washing bottle 6 is filled with 5-15% sodium hydroxide aqueous solution for collecting and treating waste gas after chlorination reaction, and the alkaline solution absorbs and removes chlorine in the waste gas and can also absorb and remove part of hydrogen chloride and volatile organic compounds. The chlorine reacts with water to generate hypochlorous acid, and the components in the water for washing out the water comprise hydrochloric acid, hypochlorous acid and organic matters, so that organic waste gas in the chlorination reaction can be effectively removed, and the problem of environmental pollution is avoided.

The operation principle of the laboratory chlorine reaction device is as follows: liquid chlorine/chlorine gas is heated by the vaporizer, gas with stable temperature can be output, inaccurate flow control caused by gas temperature change is avoided, the flow of the chlorine gas is adjusted by the gas flow controller and is introduced into the reactor, the introduction rate of the chlorine gas is effectively controlled, the reaction rate is controlled, the yield is improved, and the generation of impurities is reduced. And finally, the accurate chlorine consumption is obtained by combining the chlorine loss measured by the electronic scale, the waste of chlorine is avoided, and the emission of waste gas in the reaction is reduced.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (8)

1. The utility model provides a chlorine reaction unit is led to in laboratory, its characterized in that, includes liquid chlorine steel bottle, electronic scale, vaporizer, flow controller, reactor, exhaust treatment device, the liquid chlorine steel bottle is placed on the electronic scale, liquid chlorine steel bottle export is equipped with the valve, the liquid chlorine steel bottle passes through the pipeline and is connected with vaporizer one end, the other end and the flow controller of vaporizer are connected, the flow controller is connected with the reactor through leading to the chlorine pipeline, it inserts the reactor bottom to lead to the chlorine pipeline, reactor upper portion still is equipped with gas outlet, gas outlet passes through the pipeline and is connected with exhaust treatment device.

2. The laboratory chlorine reaction device according to claim 1, wherein the vaporizer is a low-temperature water bath vaporizer.

3. The laboratory chlorine reaction device according to claim 1, wherein the reactor is provided with a stirring device.

4. The laboratory chlorine reaction device according to claim 3, wherein the stirring device is a polytetrafluoroethylene stirring rod.

5. The laboratory chlorine reaction device according to claim 1, wherein the reactor is a reaction flask, and the reactor further comprises a water bath for controlling the temperature of the reaction flask.

6. The laboratory chlorine reaction device according to claim 1, wherein the waste gas treatment device is not less than 1 gas washing bottle containing waste gas washing liquid.

7. The laboratory chlorine reaction device of claim 6, wherein the waste gas washing solution is an alkali solution or a catalytic oxidation washing solution.

8. The laboratory chlorine reaction device of claim 7, wherein the alkali solution is 5-15% sodium hydroxide aqueous solution.

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