Anti-blocking device for gas phase system of reaction kettle

Abstract

The utility model provides an anti-blocking device for a gas phase system of a reaction kettle, and relates to the technical field of cyclic carbonate production equipment. An anti-blocking device for a gas phase system of a reaction kettle comprises the reaction kettle, a condenser, a gas-liquid separation tank and a vacuum pump, the reaction kettle is connected with the gas-liquid separation tank through a first gas phase pipeline, the condenser is arranged on the first gas phase pipeline, the gas-liquid separation tank is connected with the vacuum pump through a second gas phase pipeline, and the vacuum pump is arranged on the second gas phase pipeline. An exhaust pipeline and a condensate drainage pipeline are arranged on the vacuum pump, and heat preservation jackets are arranged on the surfaces of the first gas phase pipeline, the second gas phase pipeline, the exhaust pipeline and the vacuum pump. Ammonium bicarbonate can be prevented from crystallizing in a fluid channel, and the fluid channel is prevented from being blocked.

Description

TECHNICAL FIELD

[0001] The utility model relates to annular carbonate production equipment technical field, specifically, relate to a kind of reaction kettle gas phase system anti-blocking device. BACKGROUND

[0002] In the process of preparing annular carbonate by urea method, ammonia gas in the reaction kettle needs to be extracted by vacuum pump to remove ammonia gas in the reaction kettle. However, during the ammonia removal process, the gas phase system connected with the reaction kettle often appears to be blocked; mainly because the gas phase flowing out of the reaction kettle includes ammonia, water and carbon dioxide, and the contact of ammonia and carbon dioxide sucked by the vacuum pump will produce ammonium carbonate, which will crystallize below 60℃, thereby blocking the fluid passage of the reaction kettle gas phase system and causing system shutdown.

[0003] In addition, the outlet pressure of the vacuum pump cannot exceed 30KPa (G) under normal working conditions, and once it exceeds, the vacuum pump is prone to stop; under this condition, the temperature of the vacuum pump is not easy to exceed 60℃, so that ammonium carbonate is easily crystallized during the suction process of the vacuum pump, causing the fluid passage to be blocked and the system to be shut down. SUMMARY

[0004] The utility model aims at providing a kind of reaction kettle gas phase system anti-blocking device, which can prevent ammonium carbonate from crystallizing in fluid passage and avoid fluid passage blockage causing system shutdown.

[0005] The utility model realizes the following technical scheme:

[0006] A kind of reaction kettle gas phase system anti-blocking device, including reaction kettle, condenser, gas-liquid separation tank and vacuum pump, the reaction kettle is connected with the gas-liquid separation tank by first gas phase pipeline, the condenser is arranged on the first gas phase pipeline, the gas-liquid separation tank is connected with the vacuum pump by second gas phase pipeline, exhaust pipeline and condensate discharge pipeline are arranged on the vacuum pump, the surface of the first gas phase pipeline, the second gas phase pipeline, the exhaust pipeline and the vacuum pump are all provided with insulation jacket.

[0007] Further, the second gas phase pipeline is also connected with steam pipeline, and a steam valve is arranged on the steam pipeline.

[0008] Further, a buffer tank is arranged on the condensate discharge pipeline, and a first valve and a second valve are arranged at two ends of the buffer tank.

[0009] Further, a reflux pipeline is connected to the liquid outlet end of the gas-liquid separation tank, and the other end of the reflux pipeline is connected to the reaction kettle.

[0010] Further, a pressure gauge is arranged on the reaction kettle, and an insulation jacket is arranged at the root valve of the pressure gauge.

[0011] Further, the liquid level meter is arranged on the reactor, and a heat preservation jacket is arranged at the root valve of the liquid level meter.

[0012] Further, the second gas phase pipeline is provided with a temperature table near one end of the vacuum pump.

[0013] The technical scheme of the utility model has at least the following advantages and beneficial effects:

[0014] In the utility model, heat preservation jackets are arranged on the surfaces of the first gas phase pipeline, the second gas phase pipeline, the exhaust pipeline and the vacuum pump, so that the outflowing gas of the reactor can be maintained at a high temperature, and the ammonium carbonate generated in the suction process of the vacuum pump cannot crystallize, thereby avoiding the blockage of the fluid passage of the vacuum pump by the ammonium carbonate crystals and solving the problem of system shutdown caused by the blockage of the passage. In addition, the gas flowing into the first gas phase pipeline from the reactor includes ammonia, carbon dioxide, water and organic matter, etc., and the gas will produce liquid accumulation after condensation, and the gas-liquid separation tank can separate the liquid accumulation from the gas phase, reduce the water vapor in the gas phase, accelerate the extraction speed of the gas in the reactor and improve the ammonia removal efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0016] Figure 1 The structure diagram of the anti-blocking device of the gas phase system of the reactor provided in the embodiment 1 of the utility model.

[0017] Figure legend: 1-reactor, 2-condenser, 3-gas-liquid separation tank, 4-vacuum pump, 5-first gas phase pipeline, 6-second gas phase pipeline, 7-exhaust pipeline, 8-liquid discharge pipeline, 9-steam pipeline, 10-steam valve, 11-buffer tank, 12-first valve, 13-second valve, 14-backflow pipeline, 15-pressure gauge, 16-liquid level meter, 17-temperature table. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0020] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the application when it is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "set", "mount", "connected", "connected" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Embodiment 1

[0024] As Figure 1As shown, the embodiment provides a kind of reaction kettle gas phase system anti-blocking device, including reaction kettle 1, condenser 2, gas-liquid separation tank 3 and vacuum pump 4, the reaction kettle 1 with the gas-liquid separation tank 3 is connected by first gas phase pipeline 5, the condenser 2 is set on the first gas phase pipeline 5, the gas-liquid separation tank 3 with the vacuum pump 4 is connected by second gas phase pipeline 6, exhaust pipeline 7 and condensate pipeline 8 are set on the vacuum pump 4, the first gas phase pipeline 5, the second gas phase pipeline 6, the exhaust pipeline 7 and the surface of vacuum pump 4 are all provided with heat insulation jacket.

[0025] The first gas phase pipeline 5, the second gas phase pipeline 6, the exhaust pipeline 7 and the surface of vacuum pump 4 are all provided with heat insulation jacket, the gas that can be ensured by heat insulation jacket that reaction kettle 1 flows out maintains at higher temperature, let the ammonium carbonate that vacuum pump 4 generates in suction process cannot crystallize, to avoid the ammonium carbonate crystal that blocks the fluid passage of vacuum pump 4, solve the system parking problem caused by passage blockage.In addition, since the gas flowing into the first gas phase pipeline 5 in reaction kettle 1 includes ammonia, carbon dioxide, water and organic matter etc., the gas will produce liquid accumulation after condensation, the liquid accumulation can be separated from gas phase by using gas-liquid separation tank 3, the water vapor in gas phase is reduced, the gas extraction speed in reaction kettle 1 can be accelerated, and the ammonia removal efficiency is improved.

[0026] In the embodiment, the second gas phase pipeline 6 is also connected with steam pipeline 9, and the steam pipeline 9 is provided with steam valve 10.The steam pipeline 9 can be connected with external steam, so as to heat or warm the vacuum pump 4 and the connected pipeline, further ensure that the temperature of the vacuum pump 4 is higher than 60 DEG C, and prevent ammonium carbonate from crystallizing.In addition, if the vacuum pump 4 is stopped due to the blockage of the fluid pipeline of the vacuum pump 4, external steam can be introduced into the pipeline through the steam pipeline 9 to purge the pipeline, so as to unblock the fluid pipeline and enable the vacuum pump 4 to work again.

[0027] In the embodiment, the condensate pipeline 8 is provided with buffer tank 11, and the buffer tank 11 is provided with first valve 12 and second valve 13 at two ends respectively.Due to the negative pressure in the vacuum pump 4, the condensate in the vacuum pump 4 is difficult to be discharged from the liquid phase outlet of the vacuum pump 4.The buffer tank 11 is provided, and in the operation process, the first valve 12 is opened, and the second valve 13 is closed;when the condensate needs to be discharged, the first valve 12 is closed, and the second valve 13 is opened, so as to destroy the vacuum condition in the buffer tank 11, and thereby the condensate in the buffer tank 11 is discharged.

[0028] In the embodiment, the liquid outlet end of the gas-liquid separation tank 3 is connected with reflux pipeline 14, and the other end of the reflux pipeline 14 is connected with the reaction kettle 1.In this way, the liquid phase in the gas-liquid separation tank 3 can be refluxed to the reaction kettle 1, to continue to react in the reaction kettle 1, and improve the utilization rate of materials.

[0029] In the embodiment, the reaction kettle 1 is provided with a pressure gauge 15, and the root valve of the pressure gauge 15 is provided with a heat preservation jacket. The pressure gauge 15 can monitor the pressure in the reaction kettle 1, and ensure the safety of the reaction process in the reaction kettle 1. The root valve of the pressure gauge 15 can be heat preserved by the heat preservation jacket, so that the carbon ammonium is prevented from crystallizing at the root valve and causing the pipeline of the pressure gauge 15 to be blocked.

[0030] In the embodiment, the reaction kettle 1 is provided with a liquid level meter 16, and the root valve of the liquid level meter 16 is provided with a heat preservation jacket. The liquid level meter 16 can monitor the liquid level in the reaction kettle 1, so that the reaction of the materials in the reaction kettle 1 can be observed, and the materials can be added in time to ensure that the reaction proceeds normally. The root valve of the liquid level meter 16 can be heat preserved by the heat preservation jacket, so that the carbon ammonium is prevented from crystallizing at the root valve and causing the pipeline to be blocked.

[0031] In the embodiment, the second gas phase pipeline 6 is provided with a temperature table 17 near one end of the vacuum pump 4. The temperature of the gas entering the vacuum pump 4 can be monitored by the temperature table 17, so that whether steam needs to be introduced into the steam pipeline 9 can be judged according to the temperature, and the temperature in the vacuum pump 4 is further ensured to be high, so that the carbon ammonium is prevented from crystallizing, and the vacuum pump 4 is prevented from being stopped.

[0032] The working principle of the anti-blocking device of the gas phase system of the reaction kettle is as follows:

[0033] The vacuum pump 4 is started, the gas sucked from the reaction kettle 1 by the vacuum pump 4 passes through the first gas phase pipeline 5, the condenser 2, the gas-liquid separation tank 3, the second gas phase pipeline 6, and then enters the vacuum pump 4, and is then discharged from the gas phase outlet of the vacuum pump 4, is transported to a gas recovery device through the exhaust pipeline 7, and the accumulated liquid in the vacuum pump 4 enters the buffer tank 11 through the condensate discharge pipeline 8.

[0034] During the suction process, steam can be selectively introduced into the steam pipeline 9 according to the temperature value displayed by the temperature table 17, the steam valve 10 is opened, and the steam enters the device pipeline, so that the vacuum pump 4 is heat preserved, heated or dredged.

[0035] When the condensate needs to be discharged, the first valve 12 is closed, the second valve 13 is opened, the vacuum condition in the buffer tank 11 is destroyed, and the condensate in the buffer tank 11 is discharged.

[0036] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can be changed and varied. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A reactor gas phase system anti-blocking device, characterized in that: The reaction kettle, the condenser, the gas-liquid separation tank and the vacuum pump are connected, the reaction kettle is connected with the gas-liquid separation tank through the first gas phase pipeline, the condenser is arranged on the first gas phase pipeline, the gas-liquid separation tank is connected with the vacuum pump through the second gas phase pipeline, the vacuum pump is provided with the exhaust pipeline and the condensate pipeline, and the surfaces of the first gas phase pipeline, the second gas phase pipeline, the exhaust pipeline and the vacuum pump are provided with heat preservation jackets.

2. The anti-blocking device for the gas phase system of a reactor according to claim 1, characterized in that, The second gas phase pipeline is also connected with the steam pipeline, and the steam pipeline is provided with a steam valve.

3. The anti-blocking device for gas phase system of reaction kettle according to claim 1, characterized in that, The condensate pipeline is provided with a buffer tank, and the buffer tank is provided with a first valve and a second valve at two ends respectively.

4. The anti-blocking device for gas phase system of reaction kettle according to claim 1, characterized in that, The gas-liquid separation tank is connected with the reflux pipeline at the liquid outlet end, and the other end of the reflux pipeline is connected with the reaction kettle.

5. The anti-blocking device for gas phase system of reaction kettle according to claim 1, characterized in that, The reaction kettle is provided with a pressure gauge, and the root valve of the pressure gauge is provided with a heat preservation jacket.

6. The anti-blocking device for gas phase system of reaction kettle according to claim 1, characterized in that, The reaction kettle is provided with a liquid level meter, and the root valve of the liquid level meter is provided with a heat preservation jacket.

7. The anti-blocking device for gas phase system of reaction kettle according to claim 1, characterized in that, The second gas phase pipeline is provided with a temperature gauge at one end close to the vacuum pump.

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