Cyclohexylamine waste gas recovery device

Abstract

The utility model relates to the technical field of waste gas treatment equipment, in particular to a cyclohexylamine waste gas recovery device which comprises separation equipment and treatment equipment which are sequentially connected, the separation equipment comprises an activated carbon canister, and an inlet of the activated carbon canister is respectively connected to waste gas collection equipment and an air blower through an electromagnetic three-way valve. An outlet of the activated carbon tank is respectively connected to the cyclohexylamine recovery tank and the treatment equipment through an electromagnetic three-way valve; according to the utility model, the waste gas containing cyclohexylamine can be separated, the cyclohexylamine component in the waste gas is absorbed in the activated carbon canister, and other components are subjected to harmless treatment; cyclohexylamine absorbed in the activated carbon canister can be desorbed after being heated by the heating furnace, and enters the cyclohexylamine recovery tank through the recovery pipeline to be collected and utilized, so that waste gas waste in the cyclohexylamine production process is greatly reduced, various harmful substances in the waste gas are effectively treated, the effects of energy conservation, emission reduction, safety and environmental protection are achieved, and the environment-friendly effect is achieved. And the production efficiency and the economic benefit are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment equipment technical field, specifically for a kind of cyclohexylamine waste gas recovery device. BACKGROUND

[0002] Cyclohexylamine is a colorless to yellow liquid, soluble in water, miscible in most organic solvents;Cyclohexylamine is often used as organic solvent, also can be used to prepare desulfurizer, rubber antioxidant, vulcanization accelerator, plastic and textile chemical additive, boiler feed water treatment agent, metal corrosion inhibitor, emulsifier, preservative, antistatic agent, latex coagulant, petroleum additive, fungicide, insecticide and dye intermediate, etc., is an important chemical raw material.

[0003] In the preparation process of cyclohexylamine, waste gas containing cyclohexylamine, ammonia, cyclohexane, hydrogen, etc. will be produced;Cyclohexylamine waste gas has strong irritancy and toxicity to human body, must be discharged after suitable waste gas treatment;But the treatment of cyclohexylamine waste gas in the existing process is mostly directly regarded as waste gas, and then harmless discharge after water washing, incineration and other treatments, which also leads to the waste of part of cyclohexylamine components contained in waste gas, increases the production cost and resource waste. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of cyclohexylamine waste gas recovery device, which can treat cyclohexylamine waste gas, separate and recycle cyclohexylamine components therein.

[0005] Based on the above purpose, the utility model adopts the following technical scheme:

[0006] The cyclohexylamine waste gas recovery device comprises a separation device and a treatment device connected in sequence, the separation device comprises an activated carbon tank, the inlet of the activated carbon tank is connected with a waste gas collecting device through a gas conveying pipe;An electromagnetic three-way valve is connected to the inlet of the activated carbon tank through a gas conveying pipe, the two inlets of the electromagnetic three-way valve are connected to the waste gas collecting device and a blower respectively;A heating furnace is sleeved outside the activated carbon tank, an electromagnetic three-way valve is connected to the outlet of the activated carbon tank through a gas conveying pipe, the two outlets of the electromagnetic three-way valve are connected to a cyclohexylamine recovery tank and the treatment device respectively;The heating furnace comprises a heat preservation layer, a heating pipe in ring shape is arranged inside the heat preservation layer;A ring-shaped groove matched with the heating pipe is arranged on the outer side of the activated carbon tank, and an activated carbon ring matched with the heating pipe is arranged inside the activated carbon tank.

[0007] Preferably, the treatment device comprises a water washing tower, and a spraying mechanism is arranged in the water washing tower;An air outlet is arranged at the top of the water washing tower, and a liquid outlet and an air inlet are arranged at the bottom of the water washing tower;A combustion chamber is connected to the air outlet through a gas conveying pipe, and a filter tower is connected to the liquid outlet through a liquid conveying pipe.

[0008] Preferably, the top of the filter tower is provided with a liquid inlet, and the bottom is provided with a waste liquid outlet; the filter tower is provided with filter filling material, and the waste liquid outlet of the filter tower is connected with a waste liquid recovery tank through a liquid conveying pipeline.

[0009] Preferably, the combustion chamber is provided with a combustion cavity, and a combustion device is arranged in the combustion cavity; the top of the combustion chamber is provided with a waste gas outlet, and the waste gas outlet is connected with a waste gas discharge mechanism through a gas conveying pipe.

[0010] Preferably, a plurality of activated carbon tanks are arranged, the inlet of each activated carbon tank is connected to the waste gas collecting equipment and the air blower through an electromagnetic three-way valve respectively, and the outlet of each activated carbon tank is connected to the cyclohexylamine recovery tank and the treatment equipment through an electromagnetic three-way valve respectively.

[0011] The beneficial effects of the utility model include:

[0012] The recycling device used by the utility model can separate cyclohexylamine from waste gas, and discharge components such as ammonia, cyclohexane and hydrogen which do not need to be recycled; since the absorption performance of activated carbon to cyclohexylamine is good and the absorption performance of activated carbon to other components is poor, cyclohexylamine in waste gas can be well absorbed in the activated carbon tank, and other components continue to be transported to the treatment device; and the cyclohexylamine component absorbed in the activated carbon tank can be desorbed by heating the activated carbon tank, so that the purpose of recycling cyclohexylamine in cyclohexylamine waste gas is achieved.

[0013] The utility model sequentially carries out water washing and filtering to other components in waste gas, only cyclohexane and hydrogen which are difficult to dissolve in water are left in the water washed waste gas, and the waste gas can be changed into carbon dioxide and carbon monoxide which are basically harmless after being introduced into the combustion chamber and combusted, and then the waste gas can be discharged after being simply treated by the waste gas discharge mechanism; the ammonia in the water washed waste gas is dissolved in the water sprayed by the water washing tower and discharged from the lower liquid outlet and reaches the top of the filter tower; the filter tower is provided with filter filling material, and the water containing dissolved ammonia flows downward through the filling material under the action of gravity and is discharged from the waste liquid outlet, and the ammonia dissolved in the water is absorbed by the filling material, so that the waste liquid is purified; the subsequent waste liquid is introduced into the waste liquid recovery tank for collection, and the waste liquid can be discharged after being further purified.

[0014] The utility model achieves separation and treatment of waste gas in the cyclohexylamine preparation process, separates cyclohexylamine which can be recycled from other components and recycles the cyclohexylamine, greatly reduces the waste in the production process, improves the production efficiency and reduces the production cost; other harmful components separated from cyclohexylamine are effectively purified through multiple treatment steps, and finally harmless waste gas and waste water can be discharged, the harmful waste gas and waste water generated in the production process are reduced, and the energy saving and emission reduction effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic view of the embodiment 1 of the utility model;

[0016] Figure 2 It is the inside structure schematic view of the activated carbon tank of the embodiment 1 of the utility model;

[0017] Figure 3 It is the whole structure schematic view of the embodiment 2 of the utility model.

[0018] In the drawing: air inlet pipeline 1;Electromagnetic three-way valve 2;Activated carbon tank 3;Heating furnace 31;Heat preservation layer 32;Heating pipe 33;Activated carbon ring 34;Partition 35;Base 36;Water washing tower 4;Combustion chamber 5;Exhaust pipeline 51;Filter tower 6;Liquid discharge pipeline 61;Blower 7;Recovery pipeline 8. DETAILED DESCRIPTION

[0019] Embodiment 1

[0020] The following is further explained and explained to the utility model in combination with specific embodiments, as Figure 1 Indicated, this embodiment is a kind of cyclohexylamine waste gas recovery device, it mainly includes two parts connected in sequence, is separated equipment and processing equipment respectively;Separation equipment is used to separate cyclohexylamine in waste gas from other components, and processing equipment is responsible for treating other components separated and discharging.

[0021] Separation equipment includes activated carbon tank 3, as Figure 2 Indicated, in the embodiment, three activated carbon rings 34 are provided in activated carbon tank 3;Activated carbon ring 34 is hollow annular structure, and its side is provided as inwardly recessed arc surface;The outside of activated carbon tank 3 is provided with heating furnace 31, and heating furnace 31 includes heat preservation layer 32 of outer sleeve;Three annular heating pipes 33 are provided in the inside of heat preservation layer 32, in cooperation with three activated carbon rings 34, annular recess is provided on the side of activated carbon tank 3, and heating pipe 33 is embedded in the recess;Heating pipe 33 and the side arc surface structure of activated carbon ring 34 are coaxially arranged, so that the distance between each place of the side of activated carbon ring 34 and heating pipe 33 is equal, and the heating rate is the same when receiving heating of heating pipe 33;Partition 35 structure is provided in activated carbon tank 3, so that the waste gas entering from left side inlet moves according to the path indicated by Figure 2 Red arrow in the figure, sequentially passes through the filtration and purification of three activated carbon rings 34, and is discharged from the outlet on the right side;Thermocouple is also provided in the inside of activated carbon tank 3 for monitoring internal temperature.

[0022] The inlet of the activated carbon tank 3 is connected with an electromagnetic three-way valve 2 through a gas conveying pipe. The electromagnetic three-way valve 2 is provided with one outlet and two inlets. The outlet is connected with the activated carbon tank 3, and the two inlets are connected with the gas inlet pipe 1 and the air blower 7 respectively. The gas inlet pipe 1 is connected with the waste gas collecting device, so that the cyclohexane waste gas collected by the waste gas collecting device can be conveyed to the separation device.

[0023] The outlet of the activated carbon tank 3 is also connected with an electromagnetic three-way valve 2 through a gas conveying pipe. The electromagnetic three-way valve 2 at the outlet is provided with one inlet and two outlets. The inlet is connected with the activated carbon tank 3, and the two outlets are connected with the water washing tower 4 and the recovery pipe 8 respectively. The water washing tower 4 is a vertical tank structure, which is provided with an air inlet, an air outlet and a liquid outlet. The air inlet is arranged at the bottom of the water washing tower 4, and the air outlet is arranged at the top side of the water washing tower 4. The liquid outlet is arranged at the bottom side of the water washing tower 4. A spraying mechanism is arranged in the water washing tower 4, and a plurality of bending plates are arranged to prolong the path length of the waste gas entering the water washing tower 4 from the bottom air inlet, so as to increase the contact time with the spraying water.

[0024] The air outlet of the water washing tower 4 is connected with a combustion chamber 5 through a gas conveying pipe. The combustion chamber 5 is provided with a combustion cavity, and a ignition device is arranged in the combustion cavity. The waste gas output by the water washing tower 4 can be ignited by the ignition device, so that the harmful substances in the waste gas are converted into harmless carbon dioxide and the like, which are discharged to the waste gas discharge mechanism through an exhaust pipe 51 for further treatment and discharge.

[0025] The liquid outlet of the water washing tower 4 is connected with a filter tower 6 through a liquid conveying pipe. The filter tower 6 is a vertical tank structure, which is provided with a liquid inlet at the top side and connected with the water washing tower 4 through a liquid conveying pipe. A filter filler is arranged in the filter tower 6. The waste water introduced into the filter tower 6 from the top is treated by the filter filler, so that the harmful substances in the waste water are absorbed and filtered. Therefore, the waste water which is basically harmless can be discharged through the bottom waste liquid outlet and discharged to a waste liquid recovery tank through a liquid discharge pipe 61 for further purification treatment and then discharged.

[0026] In actual use, first, the two electromagnetic three-way valves 2 are adjusted, so that the gas inlet pipe 1, the activated carbon tank 3 and the water washing tower 4 are sequentially connected, and the air blower 7 and the recovery pipe 8 are in a closed state. At this time, the cyclohexane waste gas sent from the gas inlet pipe 1 is first introduced into the activated carbon tank 3. The cyclohexane in the waste gas is adsorbed by the activated carbon filler in the activated carbon tank 3, and the remaining waste gas components pass through the activated carbon tank 3 and are further discharged to the water washing tower 4.

[0027] The water sprayed by the spraying mechanism arranged in the water washing tower 4 mixes with the remaining waste gas components, and the ammonia gas components in the waste gas are dissolved in the water to be separated from the waste gas; the waste gas after water washing enters the combustion chamber 5 upward, and after combustion, the hydrogen gas in the waste gas is decomposed with cyclohexane to produce substantially harmless carbon dioxide and carbon monoxide components, and is further transported to the waste gas discharge mechanism through the exhaust pipeline 51 for further treatment and discharge.

[0028] The waste water dissolved with the ammonia gas components is discharged from the liquid outlet at the bottom of the water washing tower 4 and enters the filter tower 6; the filter tower 6 is provided with filter fillers, which can filter and absorb the ammonia in the waste water, and finally obtain purified waste water; the waste water is discharged through the liquid discharge pipeline 61 to the waste liquid recovery tank for further purification treatment and then discharged.

[0029] When the activated carbon fillers in the activated carbon tank 3 absorb cyclohexylamine to a certain extent, the desorption and recovery step is entered; the state of the two electromagnetic three-way valves 2 is changed, so that the air inlet of the air inlet pipeline 1 and the water washing tower 4 is closed, and the air blower 7 and the recovery pipeline 8 are respectively connected to both ends of the activated carbon tank 3; at this time, the heating furnace 31 starts to work, and the activated carbon in the activated carbon tank 3 is heated to above the desorption temperature, so that the cyclohexylamine adsorbed therein is desorbed and separated from the activated carbon; at the same time, the air blower 7 works, and fresh air is supplied to the inlet of the activated carbon tank 3 to blow out the desorbed cyclohexylamine from the outlet; the gas containing cyclohexylamine blown out of the activated carbon tank 3 enters the recovery pipeline 8, and the recovery pipeline 8 is connected with a cyclohexylamine recovery tank, so that the desorbed cyclohexylamine can be recovered and utilized.

[0030] Example 2

[0031] The difference between this embodiment and example 1 is that, as shown in Figure 3 , this embodiment is provided with a plurality of activated carbon tanks 3, and specifically, two activated carbon tanks 3 are provided in this embodiment.

[0032] Both ends of the two activated carbon tanks 3 are connected with electromagnetic three-way valves 2, the electromagnetic three-way valves 2 at the inlet are respectively connected to the air blower 7 and the air inlet pipeline 1, and the electromagnetic three-way valves 2 at the outlet are respectively connected to the recovery pipeline 8 and the water washing tower 4; since a plurality of activated carbon tanks 3 are provided, the rotation work of the two activated carbon tanks 3 can be realized in this embodiment; when one activated carbon tank 3 continuously absorbs for a certain period of time, it is switched to the heating and desorption state, and at this time, the other activated carbon tank 3 can continue to absorb and separate the cyclohexylamine; when the desorption of one activated carbon tank 3 is completed, the two activated carbon tanks 3 can exchange the working state, and the desorption work of the activated carbon tank 3 is alternately performed in the state of keeping the whole system running without stopping. According to the actual desorption work time and the adsorption work rate of the activated carbon tank 3, the number of different activated carbon tanks 3 can be reasonably arranged.

[0033] The above merely makes further explanation and description of the utility model in combination with specific embodiments, and all the description does not represent that the protection scope of the utility model is limited, any change or alternative scheme that can be easily thought of by any person skilled in the art within the technical range disclosed by the utility model should be covered in the protection scope of the utility model, therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A cyclohexylamine off-gas recovery apparatus comprising a separation device and a treatment device connected in series, characterized in that: The separation device comprises an activated carbon tank, an inlet of the activated carbon tank is connected with the waste gas collecting device through a gas conveying pipe; an electromagnetic three-way valve is connected with the inlet of the activated carbon tank through a gas conveying pipe, two inlets of the electromagnetic three-way valve are connected to the waste gas collecting device and the air blower through gas conveying pipes respectively; a heating furnace is sleeved outside the activated carbon tank, an electromagnetic three-way valve is connected with the outlet of the activated carbon tank through a gas conveying pipe, two outlets of the electromagnetic three-way valve are connected to the cyclohexylamine recovery tank and the treatment device respectively; the heating furnace comprises a heat preservation layer, a ring-shaped heating pipe is arranged inside the heat preservation layer; a ring-shaped groove matched with the heating pipe is arranged on the outer side of the activated carbon tank, and an activated carbon ring matched with the heating pipe is arranged inside the activated carbon tank.

2. The cyclohexylamine off-gas recovery apparatus according to claim 1, characterized by: The treatment device comprises a water washing tower, a spraying mechanism is arranged in the water washing tower; an air outlet is arranged at the top of the water washing tower, a liquid outlet and an air inlet are arranged at the bottom of the water washing tower; a combustion chamber is connected with the air outlet through a gas conveying pipe, and a filter tower is connected with the liquid outlet through a liquid conveying pipe.

3. The cyclohexylamine off-gas recovery apparatus according to claim 2, characterized by: A liquid inlet is arranged at the top of the filter tower, and a waste liquid outlet is arranged at the bottom of the filter tower; filter filling is arranged in the filter tower, and a waste liquid recovery tank is connected with the waste liquid outlet of the filter tower through a liquid conveying pipe.

4. The cyclohexane amine off-gas recovery apparatus according to claim 2, characterized by: A combustion cavity is arranged in the combustion chamber, and an ignition device is arranged in the combustion cavity; a waste gas outlet is arranged at the top of the combustion chamber, and a waste gas discharge mechanism is connected with the waste gas outlet through a gas conveying pipe.

5. The cyclohexane amine off-gas recovery apparatus according to claim 1, characterized by: The activated carbon tank is provided in plurality, the inlet of each activated carbon tank is connected to the waste gas collecting device and the air blower through an electromagnetic three-way valve respectively, and the outlet of each activated carbon tank is connected to the cyclohexylamine recovery tank and the treatment device through an electromagnetic three-way valve respectively.

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