CN2073877U - Production device for cyclic absorption method - Google Patents

Abstract

The utility model relates to production equipment of chloromethyl methyl ether. The utility model belongs to a production technology system of a circulating absorption process; the utility model comprises an eductor, a gas-phase distributor and a shower tower. The utility model can shorten the reaction period, improve the yield and eliminate elementarily the pollution of the tail gas; the utility model can save raw material and reduce the production cost. At the same time, the utility model can be used as the special equipment for absorbing tail gas for chemical products with the similar production process; the utility model can be a considerable technique for production of the negative resin after the utility model is adopted.

Description

A kind of absorption cycle production equipment

The utility model relates to a kind of chloromethyl methyl ether production equipment, mainly is applicable in the production technique of absorption cycle, also can be as special-purpose device for absorbing tail gas, with the supporting use of other production process of chemical product.

Chloromethyl methyl ether is the chloromethylation reagent during anionite-exchange resin is made, also can be as the swelling agent in other chemical reactions, and reagent uses.The synthetic essence of chloromethyl methyl ether is the mass transfer process based on chemical absorption, and mass transfer velocity depends on impellent, absorption agent gaseous fraction and the two alternate ways of contact of process, and its chemical reaction is instantaneous reversible exothermic reaction:

Reaction is carried out in liquid film, and its speed is controlled by the phase interface size, increases phase interface and just can strengthen reaction, thereby improve speed of response.The synthesizer of chloromethyl ether absorbs still for the reaction of single tube Bubbling method in the present domestic negative resin production, gas-liquid can only be met around airway mutually, the gas-liquid phase-contact surface is little, conplane strength of fluid gradient is big in the still, can only rely on intermolecular diffusion to reach balance, therefore the output capacity of chloromethyl methyl ether is low, and obnoxious flavour content height causes the production cycle long in the tail gas, and atmospheric pollution is serious.

At the problems of the prior art, the utility model proposes a kind of gas-liquid phase-contact surface that increases, reduce the concentration gradient of same flat liquid in the still, and can carry out the secondary distribution absorption in still, the circulation of basically eliminate tail gas emptying absorbs the production equipment of chloromethyl methyl ether.

Now the utility model design and technical solution are described below:

The negative pressure that the utility model device utilizes injector 1 to produce around nozzle, make intense mixing in hydrogen chloride gas and the absorbing medium high velocity turbulent flow in injector, guarantee very little diffusional resistance, reinforcing mass transfer process greatly, the gas-liquid mixture of injector diffusing opening outlet enters liquid phase with the form of intensive bubble behind reactor 3 intravital distributing gas phase spargers 11, make and produce the liquid phase turbulences in the reactor 3, the gas-liquid area that contacts increases, and the productive rate of resultant chloromethyl methyl ether is improved.The unabsorbed gas of minute quantity again can be by the leacheate in the filler eluting column 2, and reverse the absorption to reactor remains micro-tail gas and be equipped with in the tail gas respiratory box 7 of sig water outward by tower and the back emptying.When system was recycled to the raw material that drops in the reactor continuously and almost reacts completely, finished reaction time.

Be described further below in conjunction with accompanying drawing:

Fig. 1

Absorption cycle is produced the chloromethyl methyl ether production equipment

Wherein

1, the commissioning pipe 7 of injector 2, eluting column 3, reactor 4, recycle pump 5, HCl gas duct 6, methyl alcohol, formaldehyde, tail gas respiratory box 8, evacuated tube 9, gravitometer 10, cooling jacket 11, gas phase sparger

Raw material (methyl alcohol, formaldehyde) drops in the reactor 3 from commissioning pipe 6, and the pump 4 with certain pressure is squeezed into injector 1 and eluting column 2, makes it produce negative pressure around the nozzle of injector 1, and nozzle is the jet bleeder, and its quantity can be single or multiple.Hydrogen chloride gas is inhaled into from gas duct 15 in the injector 1, enters in the reactor 3 behind gas phase sparger 11 thorough mixing.Unreacted gas completely can carry out the secondary distribution absorption in reactor 3.Cooling jacket 10 is equipped with in the outside of reactor 3, reduces temperature in the reactor 3 with continuous round-robin water coolant, impels reaction forward to carry out.Eluting column 2 is equipped with at the top of reactor 3, and tower diameter is 0.05～0.3: 1 with the diameter ratio in still footpath, and tower height and still height ratio are 0.1～0.8: 1.The top of eluting column 2 is connected to the evacuated tube 8 of getting rid of tail gas.The single or multiple lift column plate is equipped with in the inside of eluting column 2, so that pack filler into, filler can be porcelain ring or ethene ring.Be connected to tail gas absorption liquid case 7 on the evacuated tube 8.

The utility model is compared with prior art, can make the absorptivity of hydrogen chloride gas reach 97%～99%, shortens 4/5～3/5 reaction time, under normal operation, chlorinity 〉=44% has not only improved the productive rate of chloromethyl methyl ether greatly, and elimination the emptying pollution of tail gas. Simultaneously, use because mother liquor can not go out systemic circulation, so also saved a large amount of raw materials, reduced the cost of anion exchange resin. In addition, because this apparatus system is to be under the negative pressure state to move, so this device also can use as the device for absorbing tail gas of special use the leakage problem of having avoided each joint, the tail gas of discharge also can use as the chloromethyl ether raw materials recovery. The employing of this device will bring for the production of negative resin considerable technology, economic benefit.

Claims (4)

1, a kind of absorption cycle production equipment, mainly be applicable in the absorption cycle production technique of chloromethyl methyl ether to have commissioning pipe, evacuated tube, reactor, cooling jacket, it is characterized in that, distributing gas phase sparger is equipped with in reactor inside, and eluting column is equipped with at the top; Injector is equipped with in hydrogen chloride gas and absorbing medium ingress, between the pipeline of reactor bottom discharge outlet and eluting column inlet recycle pump and gravitometer is housed, and the tail gas respiratory box is housed on the evacuated tube on eluting column top.

2, according to the absorption cycle production equipment described in the claim 1, it is characterized in that described injector is the jet bleeder, its nozzle can be single or multiple.

3,, it is characterized in that described eluting column inside is equipped with the single or multiple lift column plate according to the absorption cycle production equipment described in the claim 1; The eluting column tower diameter is 0.05～0.3: 1 with reactor diameter ratio, and tower height and reactor height ratio are 0.1～0.8: 1.

4, according to the absorption cycle production equipment described in the claim 1, it is characterized in that the distributing gas phase sparger that is equipped with described reactor inside can be two-tube or the multitube radiation formula, it is distributed also to can be disc type.

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