Improved gas-liquid reaction device

Abstract

The utility model discloses an improved gas-liquid reaction device, which belongs to the technical field of chemical production equipment and gas-liquid reaction and comprises a tubular reactor, a reaction kettle, a tail gas absorption system and the like. The device is characterized in that key equipment units such as a gasifier, a venturi absorption ejector, a tubular reactor, a reaction kettle, an external heat exchanger and a tail gas absorption system are coordinated and linked to complete gas-liquid two-phase reaction. The problems of low bubbling type gas-liquid reaction efficiency and large gaseous material loss in the prior art are effectively solved, the safety risk caused by circulation of the reaction material through the kettle bottom is solved, the problem of slow cooling of a single reaction kettle is solved, and the problem that the tail gas absorption efficiency is influenced by too fast temperature rise of a tail gas absorption system is also effectively solved. The improved gas-liquid reaction device disclosed by the technical scheme of the utility model also has the characteristics of compact structure, convenience in operation, environment friendliness and high production efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the chemical production equipment and gas-liquid reaction technical field, especially relates to an improved gas-liquid reaction device. BACKGROUND

[0002] Gas-liquid reaction is a common reaction type in chemical production, such as: preparing sulfite by passing sulfur dioxide gas into lye, preparing 2-chloroethanol by passing ethylene oxide gas into hydrochloric acid, and the reaction of hydrogen chloride or ammonia tail gas with water absorption. Before that, the liquefied raw material is gasified and then passed into another raw material solution to perform gas-liquid reaction in a bubbling manner.

[0003] The obvious defect of the bubbling gas-liquid reaction is that the waste consumption of the gas raw material is too large due to the device problem, which is extremely unfavorable for the control of production cost, and the emission of toxic and harmful gas is very unfavorable for environmental protection and production safety.

[0004] Therefore, we need to improve the gas-liquid reaction device in combination with the deficiencies of the prior art to reduce the cost and be friendly to the environment, while ensuring safe production. SUMMARY

[0005] In order to solve the above problems, the utility model discloses an improved gas-liquid reaction device, which introduces a venturi absorption injector, a tubular reactor, an external heat exchanger, a liquid guide and a multi-stage tail gas absorption system, and cooperates with a reaction kettle to complete the gas-liquid two-phase reaction. The application of the technical scheme makes the gas raw material conversion rate reach more than 99.0%, and there is no emission of toxic and harmful tail gas, which is very beneficial to reducing enterprise production cost, safe production and environmental protection.

[0006] The improved gas-liquid reaction device of the utility model technical scheme comprises: a liquefied raw material cylinder, a hot water tank, a gasification coil, a liquid guide, a circulating pump, a venturi absorption injector, a tubular reactor, an external heat exchanger, a reaction kettle, an absorption tank, an absorption tower, an absorption circulating pump and an internal heat exchanger. The liquefied raw material cylinder is connected with one end of the gasification coil immersed in the hot water tank through a flexible connection, the other end of the gasification coil is connected with the side opening of the venturi absorption injector, the venturi absorption injector tail end inlet is connected with the pipeline inserted into the bottom of the reaction kettle through the circulating pump and the liquid guide, the venturi absorption injector outlet is connected with the tubular reactor inlet, the tubular reactor outlet is communicated with the external heat exchanger inlet, the external heat exchanger outlet is inserted into the reaction kettle through the pipeline, one opening of the reaction kettle is connected with the lower part of the absorption tower through the pipeline, the absorption tower is arranged directly above the absorption tank, and the internal heat exchanger is arranged in the absorption tank. The above components are organically combined together and cooperatively work, and can stably and efficiently complete the target gas-liquid reaction.

[0007] Preferably, the improved gas-liquid reaction device has the features that the gasification coil has a diameter of 50-100 mm, a heat exchange area of 40-80 square meters, and a straight pipe part upward from the outlet of the gasification coil.

[0008] Preferably, the improved gas-liquid reaction device has the features that the inner surface area of the tubular reactor is 150-200 square meters, the tubular reactor is internally provided with mass transfer burrs, and the effective mass transfer area is 250-400 square meters.

[0009] Preferably, the improved gas-liquid reaction device has the features that the purpose of introducing the Venturi absorption ejector is to force the full contact of gas and liquid two phases and to start the reaction instantaneously, which is very beneficial to the operation of the subsequent tubular reactor and reaction kettle.

[0010] Preferably, the improved gas-liquid reaction device has the features that the material of the external heat exchanger is graphite or polytetrafluoroethylene, the external heat exchanger is composed of 2-4 units in parallel connection, and the total heat exchange area is 150-200 square meters.

[0011] Preferably, the improved gas-liquid reaction device has the features that the liquid guide is made of hard PP or glass lining material, the inlet is arranged at the upper part, the outlet is arranged at the lower part, the height is 500-1000 mm, and the capacity is 0.05-0.1 cubic meters.

[0012] Preferably, the improved gas-liquid reaction device has the characteristics that the absorption tower is made of hard PP material, the tower body has a diameter of 500-1000 mm, is combined by 1-4 towers, and is internally provided with 6-12 layers of filler modules, and the filler modules are internally provided with spherical PE or corrugated curved surface fillers.

[0013] Preferably, the improved gas-liquid reaction device has the characteristics that the internally provided heat exchanger is welded by hard PP pipes, and has a heat exchange area of 50-100 square meters. The purpose of the design is to rapidly cool the absorption liquid in the absorption tank, and the lower the temperature is, the more beneficial to the absorption of the tail gas.

[0014] The improved gas-liquid reaction device has the following four advantages: 1. The gas-liquid reaction is stable, the consumption of gaseous raw materials is low, and it is beneficial to safe production and reduction of production cost; 2. In the relatively closed venturi absorption injector, the pipe reactor and the external heat exchanger stage, the gas-liquid reaction is basically completed by more than 97%, and no raw gas escapes in the reaction kettle stage, so that the reaction and tail gas absorption are always in a stable operation state; 3. The conversion rate of gaseous raw materials is high, the tail gas absorption effect is good in the later stage, no toxic and harmful tail gas escapes, and it is friendly to the environment; 4. It also has the advantages of compact structure, convenient operation, short production cycle and safety and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0016] Figure 1 In the middle: liquefied raw material steel bottle 01, nitrogen steel bottle 02, gasification coil 03, hot water tank 04, reaction kettle 05, liquid introducing device 06, circulating pump 07, pH meter 08, venturi injector 09, pipe reactor 10, external heat exchanger 11, absorption tank 13, absorption circulating pump 14, absorption tower 15, hot water inlet 16, hot water outlet 17, cooling water inlet 18, cooling water outlet 19, internally provided heat exchanger port 20, harmless tail gas outlet 21. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will combine the specific embodiments of the present application with the prior art. Figure 1 The specific embodiments of the present application are further described.

[0018] The improved gas-liquid reaction device comprises a liquefied raw material cylinder 01, a nitrogen cylinder 02, a gasification coil 03, a hot water tank 04, a reaction kettle 05, a liquid guide 06, a circulating pump 07, a pH meter 08, a venturi ejector 09, a tubular reactor 10, an external heat exchanger 11, an absorption tank 13, an absorption circulating pump 14, an absorption tower 15, a hot water inlet 16, a hot water outlet 17, a cooling water inlet 18, a cooling water outlet 19, an internal heat exchanger port 20, and a harmless tail gas outlet 21.

[0019] Further, the improved gas-liquid reaction device comprises a liquefied raw material cylinder 01, a nitrogen cylinder 02, a gasification coil 03, a hot water tank 04, a reaction kettle 05, a liquid guide 06, a circulating pump 07, a pH meter 08, a venturi ejector 09, a tubular reactor 10, an external heat exchanger 11, an absorption tank 13, an absorption circulating pump 14, an absorption tower 15, a hot water inlet 16, a hot water outlet 17, a cooling water inlet 18, a cooling water outlet 19, an internal heat exchanger port 20, and a harmless tail gas outlet 21.

[0020] Further, the improved gas-liquid reaction device comprises a liquefied raw material cylinder 01, a nitrogen cylinder 02, a gasification coil 03, a hot water tank 04, a reaction kettle 05, a liquid guide 06, a circulating pump 07, a pH meter 08, a venturi ejector 09, a tubular reactor 10, an external heat exchanger 11, an absorption tank 13, an absorption circulating pump 14, an absorption tower 15, a hot water inlet 16, a hot water outlet 17, a cooling water inlet 18, a cooling water outlet 19, an internal heat exchanger port 20, and a harmless tail gas outlet 21.

[0021] Further, the improved gas-liquid reaction device comprises a liquefied raw material cylinder 01, a nitrogen cylinder 02, a gasification coil 03, a hot water tank 04, a reaction kettle 05, a liquid guide 06, a circulating pump 07, a pH meter 08, a venturi ejector 09, a tubular reactor 10, an external heat exchanger 11, an absorption tank 13, an absorption circulating pump 14, an absorption tower 15, a hot water inlet 16, a hot water outlet 17, a cooling water inlet 18, a cooling water outlet 19, an internal heat exchanger port 20, and a harmless tail gas outlet 21.

[0022] Further, the improved gas-liquid reaction device according to the embodiment of the present specific implementation has the feature that the purpose of introducing the venturi absorption ejector is to force the sufficient contact of the gas-liquid two-phase and to start the reaction instantaneously, which is very beneficial to the operation of the subsequent tubular reactor and reaction kettle.

[0023] Further, the improved gas-liquid reaction device according to the embodiment of the present specific implementation has the feature that the material of the external heat exchanger is graphite or polytetrafluoroethylene, and 2-4 units are combined in parallel, and the total heat exchange area is 150-200 square meters. The purpose of introducing the external heat exchanger is to make up for the lack of specific surface area of the reaction kettle, so that a large amount of heat released by the mixture passing through the venturi absorption ejector and the tubular reactor can be quickly released, thereby making the process safer and more reliable.

[0024] Further, the improved gas-liquid reaction device according to the embodiment of the present specific implementation has the feature that the liquid introducing device is made of hard PP or glass lining, the inlet is arranged at the upper part, the outlet is arranged at the lower part, the height is 500-1000 mm, and the capacity is 0.05-0.1 cubic meters. The purpose of designing and installing the liquid introducing device is to realize the upward pumping of the material without the reaction kettle bottom valve, which can effectively avoid the sudden risk caused by the sudden damage of the reaction kettle bottom valve when pumping the material downward.

[0025] Further, the improved gas-liquid reaction device according to the embodiment of the present specific implementation has the feature that the absorption tower is made of hard PP, the tower body diameter is 500-1000 mm, and 1-4 units are combined, the tower body is internally provided with 6-12 layers of filler modules, and the filler modules are internally provided with spherical PE or corrugated curved surface fillers. The multi-stage tail gas absorption effect is good, which is beneficial to the protection of the environment, and the purpose of filling the tower body with the filler modules is to improve the mass transfer effect and the convenience of loading and unloading.

[0026] Further, the improved gas-liquid reaction device according to the embodiment of the present specific implementation has the feature that the internal heat exchanger is welded by hard PP pipe material, and the heat exchange area is 50-100 square meters. The purpose of such design is to quickly cool the absorption liquid in the absorption tank, and the lower the temperature, the more beneficial to the absorption of the tail gas.

[0027] Further, the improved gas-liquid reaction device described in the embodiment of the specific embodiment can be described as follows in simple operation mode: a certain amount of liquid raw material reaction liquid is injected into the reaction kettle 05, the circulating pump 07 is started to circulate the liquid raw material or reaction liquid from the reaction kettle 05 through the liquid guide 06, the venturi absorption ejector 09, the tubular reactor 10, and the external heat exchanger 11 into the reaction kettle 05, the liquefied raw material cylinder 01 is opened, the liquefied raw material is gasified through the gasification coil 03 and then enters the venturi absorption ejector through the side inlet of the venturi absorption ejector to start instantaneous contact and absorption reaction with the liquid raw material, the reaction liquid enters the tubular reactor 10 at high speed from the outlet of the venturi absorption ejector 09 to carry out high-efficiency contact reaction, the hot reaction liquid is cooled through the external heat exchanger 11 and then enters the reaction kettle 05 to continue reaction or transfer, the reaction tail gas is harmlessly treated through the absorption tower 15, and the above-mentioned circulation is repeated, when the pH meter 08 monitors that the pH value of the reaction liquid reaches the control standard, the reaction is considered to be completed, and the next process is carried out for further treatment.

[0028] The improved gas-liquid reaction device described in the embodiment of the specific embodiment has the following obvious beneficial effects: 1. The gas-liquid reaction is stable, the consumption of gaseous raw materials is low, and it is more favorable for safety production and reducing production cost; 2. In the relatively closed venturi absorption ejector, tubular reactor and external heat exchanger stage, the gas-liquid reaction is basically completed by more than 97%, and basically no raw material gas escapes in the reaction kettle stage, so that the reaction and tail gas absorption are always in a stable operation state; 3. The conversion rate of gaseous raw materials is high, the absorption effect of tail gas in the later stage is good, no toxic and harmful tail gas escapes, and it is more friendly to the environment; 4. It also has the advantages of compact structure, convenient operation, short production cycle, safety and reliability.

[0029] Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model. The protection scope of the utility model should be consistent with the widest range of principles and novel characteristics described in the present text.

Claims

1. An improved gas-liquid reaction apparatus, comprising: The invention comprises a liquefied feedstock cylinder, a hot water tank, a vaporization coil, a liquid priming device, a circulating pump, a Venturi absorber ejector, a tubular reactor, an external heat exchanger, a reaction vessel, an absorption tank, an absorption tower, an absorption circulating pump, and an internal heat exchanger. The liquefied feedstock cylinder is connected to one end of a vaporization coil immersed in a hot water tank via a flexible connection. The other end of the vaporization coil is connected to the side opening of the Venturi absorber ejector. The feed inlet at the tail end of the Venturi absorber ejector is connected from the upper part of the reaction vessel to a pipe inserted into the bottom of the reaction vessel via a circulating pump and a liquid priming device. The outlet of the Venturi absorber ejector is connected to the inlet of the tubular reactor. The outlet of the tubular reactor is connected to the inlet of the external heat exchanger. The outlet of the external heat exchanger is inserted into the interior of the reaction vessel via a pipe. One opening of the reaction vessel is connected to the lower part of the absorption tower via a pipe. The absorption tower is located directly above the absorption tank, and an internal heat exchanger is installed inside the absorption tank.

2. The improved gas-liquid reaction device according to claim 1, characterized in that, The vaporization coil has a diameter of 50-100mm and a heat exchange area of ​​40-80㎡. The portion of the vaporization coil from the outlet upwards is a straight pipe.

3. The improved gas-liquid reaction device according to claim 1, characterized in that, The tubular reactor has an inner surface area of ​​150-200 m², and is equipped with mass transfer burrs inside, resulting in an effective mass transfer area of ​​250-400 m².

4. An improved gas-liquid reaction device according to claim 1, characterized in that, The external heat exchanger is made of graphite or polytetrafluoroethylene and consists of 2 to 4 units connected in parallel, with a total heat exchange area of ​​150 to 200 square meters.

5. An improved gas-liquid reaction device according to claim 1, characterized in that, The liquid inlet device is made of rigid PP or enamel, with the inlet located at the top and the outlet at the bottom. Its height is 500-1000mm and its capacity is 0.05-0.1m³.

6. An improved gas-liquid reaction apparatus according to claim 1, characterized in that, The absorption tower is made of rigid PP material, with a tower body diameter of 500-1000mm, and is composed of 1-4 units. The tower body has 6-12 layers of packing modules inside, and the packing modules contain spherical PE or corrugated curved surface packing.

7. An improved gas-liquid reaction apparatus according to claim 1, characterized in that, The internal heat exchanger is welded from rigid PP pipes, with a heat exchange area of ​​50-100㎡.

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