Furfural emptying waste gas collecting and recycling device

Abstract

The utility model discloses a furfural emptying waste gas collecting and recycling device, which belongs to the technical field of waste gas collecting and recycling and comprises a decompression cooling device, the tail of the decompression cooling device is inserted into a gas collecting chamber, a collecting circulating water tank and a secondary spraying component are arranged in the gas collecting chamber, and the secondary spraying component is positioned above the collecting circulating water tank. The gas collecting chamber is connected with the gas-liquid separator through a blow-down pipe, the gas-liquid separator is connected with the activated carbon adsorption device through a third connecting pipe, and the furfural emptying waste gas collecting and recycling device is composed of the decompression cooling device, the gas collecting chamber, the collecting and circulating water tank, the secondary spraying assembly, the gas-liquid separator and the activated carbon adsorption device. The device can efficiently collect and treat the emptying waste gas generated in the furfural production process, can remove harmful organic matters, smoke and other pollutants in the furfural emptying waste gas, achieves the environment-friendly emission standard, and is small in investment, simple in system structure, convenient to operate and low in operation and maintenance cost compared with an existing universal treatment method.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas collection and recycling technical field, especially a furaldehyde exhaust gas collection and recycling device. BACKGROUND

[0002] In the production process of furaldehyde, a large amount of waste gas is produced, which is mainly derived from the residual waste gas in the hydrolysis kettle after raw material hydrolysis, and contains a small amount of product, acetic acid and other light and heavy components, in order to improve the comprehensive yield without affecting the subsequent hydrolysis, only exhaust. If these waste gases are not effectively treated and directly discharged into the atmosphere, it will cause certain pollution to the environment.

[0003] At present, there are some technologies and methods for furaldehyde plant waste gas treatment, the most commonly used is activated carbon adsorption or zeolite plus catalytic combustion waste gas treatment method, now most of the exhaust gas of the plant directly enters the waste gas treatment facility or enters the deslagging chamber first and then enters the treatment facility, such a laborious process has some shortcomings, first, incomplete collection, some of which will diffuse into the air, second, the adsorption device and catalytic combustion device of the treatment facility have too large treatment capacity, high initial investment cost, and the operation cost of the facility increases due to large waste gas treatment capacity, in general, there are problems such as low efficiency, high cost and complex operation and maintenance. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a furaldehyde exhaust gas collection and recycling device, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0006] A furaldehyde exhaust gas collection and recycling device, comprising a pressure reducing cooling device, the tail of the pressure reducing cooling device is inserted into a gas collection chamber, a collection circulating water tank and a secondary spraying assembly are arranged in the gas collection chamber, the secondary spraying assembly is located above the collection circulating water tank, the gas collection chamber is connected with a gas-liquid separator through a vent pipe, and the gas-liquid separator is connected with an activated carbon adsorption device through a third connecting pipe.

[0007] Preferably, the first end of the pressure reducing cooling device is connected with a hydrolysis reactor in a workshop.

[0008] Preferably, the decompression cooling device is composed of a first stainless steel pipe, a second stainless steel pipe, a third stainless steel pipe, a primary spraying assembly and a first connecting pipe, the first stainless steel pipe is fixedly connected with the gas outlet pipe of the hydrolysis reactor, the second stainless steel pipe is fixedly installed at the tail end of the first stainless steel pipe, the third stainless steel pipe is fixedly installed at the tail end of the second stainless steel pipe, the first connecting pipe is fixedly installed at the tail end of the third stainless steel pipe, the first connecting pipe passes through the tail end of the gas collecting chamber and is located above the circulating water collecting tank, and the primary spraying assembly is fixedly installed on the third stainless steel pipe.

[0009] Preferably, the circulating water collecting tank is provided with an overflow pipe and a cooling liquid recovery pipe, and the cooling liquid recovery pipe is fixedly installed with a first water pump.

[0010] Preferably, the secondary spraying assembly is connected with the circulating water collecting tank through a second connecting pipe, and the second connecting pipe is fixedly installed with a second water pump.

[0011] Preferably, the gas-liquid separator is provided with a flow collecting pipe, and the flow collecting pipe is fixedly connected with the cooling liquid recovery pipe.

[0012] Compared with the prior art, the furfural exhaust gas collecting and recycling device has the following beneficial effects:

[0013] The furfural exhaust gas collecting and recycling device composed of the decompression cooling device, the gas collecting chamber, the circulating water collecting tank, the secondary spraying assembly, the gas-liquid separator and the activated carbon adsorption device can efficiently collect and treat the exhaust gas generated in the furfural production process, and the treatment pressure of the activated carbon adsorption device can be greatly relieved after the furfural exhaust gas is treated by the decompression cooling device, the gas collecting chamber, the circulating water collecting tank, the secondary spraying assembly and the gas-liquid separator, so that the service life of the easily-worn materials in the activated carbon adsorption device can be increased, harmful organic matters and smoke dust and other pollutants in the furfural exhaust gas can be effectively removed, the environmental protection emission standard can be reached, and the device has the advantages of small investment, simple system structure, convenient operation, low operation and maintenance cost and high efficiency compared with the common treatment method. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model.

[0015] Figure 2 It is a detailed structure schematic view of the decompression cooling device of the utility model.

[0016] Figure 3 It is a structure schematic view of the decompression cooling device, the gas collecting chamber, the circulating water collecting tank and the secondary spraying assembly of the utility model.

[0017] Figure 4The utility model discloses a structure diagram of gas collecting chamber, collection circulating water tank, secondary spray subassembly and gas-liquid separator.

[0018] In the drawing: 1, pressure reducing cooling device;2, gas collecting chamber;3, collection circulating water tank;4, secondary spray subassembly;5, gas-liquid separator;6, activated carbon adsorption device;7, hydrolysis reaction kettle;8, work shop;9, first stainless steel pipe;10, second stainless steel pipe;11, third stainless steel pipe;12, primary spray subassembly;13, first connecting pipe;14, vent pipe;15, overflow pipe;16, cooling liquid recovery pipe;17, first water pump;18, second connecting pipe;19, second water pump;20, third connecting pipe;21, confluence pipe. DETAILED DESCRIPTION

[0019] In order to make the technical means, creation features, achieve purposes and effects of the utility model easy to understand, the following further describes the utility model in connection with specific implementation ways.

[0020] Please refer to Figure 1 , Figure 2 , Figure 3 As shown in the drawing, a kind of furfural emptying exhaust gas collection and reuse device, including pressure reducing cooling device 1, the first end of pressure reducing cooling device 1 is connected with the hydrolysis reaction kettle 7 in work shop 8, pressure reducing cooling device 1 is made of first stainless steel pipe 9, second stainless steel pipe 10, third stainless steel pipe 11, primary spray subassembly 12 and first connecting pipe 13, first stainless steel pipe 9 is fixedly connected with the gas outlet pipe of hydrolysis reaction kettle 7, second stainless steel pipe 10 is fixedly installed at the tail end of first stainless steel pipe 9, third stainless steel pipe 11 is fixedly installed at the tail end of second stainless steel pipe 10, first connecting pipe 13 is fixedly installed at the tail end of third stainless steel pipe 11, and first connecting pipe 13 passes through the tail end of gas collecting chamber 2 and is located above collection circulating water tank 3, primary spray subassembly 12 is fixedly installed on third stainless steel pipe 11, first stainless steel pipe 9 is stainless steel pipe with 150 millimeters diameter, second stainless steel pipe 10 is stainless steel pipe with 250 millimeters diameter, third stainless steel pipe 11 is stainless steel pipe with 350 millimeters diameter, when using, the furfural emptying exhaust gas from hydrolysis reaction kettle 7 will enter first stainless steel pipe 9, second stainless steel pipe 10, third stainless steel pipe 11 on pressure reducing cooling device 1 in turn, since the diameter of first stainless steel pipe 9, second stainless steel pipe 10, third stainless steel pipe 11 is successively larger, the furfural emptying exhaust gas at this time will be gradually decompressed, when furfural emptying exhaust gas enters third stainless steel pipe 11, primary spray subassembly 12 starts, and primary spray subassembly 12 can spray cooling water into third stainless steel pipe 11 at this time, so as to cool furfural emptying exhaust gas, then furfural emptying exhaust gas will enter gas collecting chamber 2 through first connecting pipe 13.

[0021] Please refer to Figure 1 ,Figure 2 、 Figure 3 、 Figure 4 As shown in FIG. 1, the tail of the decompression cooling device 1 is inserted into the gas collection chamber 2, the gas collection chamber 2 is provided with a collection circulating water tank 3 and a secondary spraying assembly 4, the secondary spraying assembly 4 is located above the collection circulating water tank 3, the collection circulating water tank 3 is provided with an overflow pipe 15 and a cooling liquid recovery pipe 16, the cooling liquid recovery pipe 16 is fixedly installed with a first water pump 17, the secondary spraying assembly 4 is connected with the collection circulating water tank 3 through a second connecting pipe 18, and the second connecting pipe 18 is fixedly installed with a second water pump 19, after the furfural emptying waste gas is decompressed and cooled by the decompression cooling device 1, most of the furfural emptying waste gas will be condensed into liquid and flow into the collection circulating water tank 3, and the residual furfural emptying waste gas will enter the gas collection chamber 2, at this time, the second water pump 19 is started to pump the water in the collection circulating water tank 3 to the secondary spraying assembly 4 through the second connecting pipe 18, so that the residual furfural emptying waste gas is sprayed by the secondary spraying assembly 4, when the liquid collected in the collection circulating water tank 3 reaches a certain concentration, the liquid collected in the collection circulating water tank 3 can be pumped to the distillation column by the first water pump 17 for waste liquid recovery.

[0022] As shown in FIG. 1, the tail of the decompression cooling device 1 is inserted into the gas collection chamber 2, the gas collection chamber 2 is provided with a collection circulating water tank 3 and a secondary spraying assembly 4, the secondary spraying assembly 4 is located above the collection circulating water tank 3, the collection circulating water tank 3 is provided with an overflow pipe 15 and a cooling liquid recovery pipe 16, the cooling liquid recovery pipe 16 is fixedly installed with a first water pump 17, the secondary spraying assembly 4 is connected with the collection circulating water tank 3 through a second connecting pipe 18, and the second connecting pipe 18 is fixedly installed with a second water pump 19, after the furfural emptying waste gas is decompressed and cooled by the decompression cooling device 1, most of the furfural emptying waste gas will be condensed into liquid and flow into the collection circulating water tank 3, and the residual furfural emptying waste gas will enter the gas collection chamber 2, at this time, the second water pump 19 is started to pump the water in the collection circulating water tank 3 to the secondary spraying assembly 4 through the second connecting pipe 18, so that the residual furfural emptying waste gas is sprayed by the secondary spraying assembly 4, when the liquid collected in the collection circulating water tank 3 reaches a certain concentration, the liquid collected in the collection circulating water tank 3 can be pumped to the distillation column by the first water pump 17 for waste liquid recovery. Figure 1 、 Figure 4 As shown in FIG. 1, the tail of the decompression cooling device 1 is inserted into the gas collection chamber 2, the gas collection chamber 2 is provided with a collection circulating water tank 3 and a secondary spraying assembly 4, the secondary spraying assembly 4 is located above the collection circulating water tank 3, the collection circulating water tank 3 is provided with an overflow pipe 15 and a cooling liquid recovery pipe 16, the cooling liquid recovery pipe 16 is fixedly installed with a first water pump 17, the secondary spraying assembly 4 is connected with the collection circulating water tank 3 through a second connecting pipe 18, and the second connecting pipe 18 is fixedly installed with a second water pump 19, after the furfural emptying waste gas is decompressed and cooled by the decompression cooling device 1, most of the furfural emptying waste gas will be condensed into liquid and flow into the collection circulating water tank 3, and the residual furfural emptying waste gas will enter the gas collection chamber 2, at this time, the second water pump 19 is started to pump the water in the collection circulating water tank 3 to the secondary spraying assembly 4 through the second connecting pipe 18, so that the residual furfural emptying waste gas is sprayed by the secondary spraying assembly 4, when the liquid collected in the collection circulating water tank 3 reaches a certain concentration, the liquid collected in the collection circulating water tank 3 can be pumped to the distillation column by the first water pump 17 for waste liquid recovery.

[0023] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The protection scope of the present application is defined by the appended claims and equivalents thereof.

Claims

1. A waste gas collecting and reusing device for emptying of furfural, characterized by: The application relates to a decompression cooling device (1), the tail end of which is inserted into a gas collecting chamber (2), the gas collecting chamber (2) is provided with a circulating water collecting tank (3) and a secondary spraying assembly (4), the secondary spraying assembly (4) is located above the circulating water collecting tank (3), the gas collecting chamber (2) is connected with a gas-liquid separator (5) through a vent pipe (14), and the gas-liquid separator (5) is connected with an activated carbon adsorption device (6) through a third connecting pipe (20).

2. The waste gas collection and reuse device for emptying of furfural according to claim 1, characterized in that: The head end of the decompression cooling device (1) is connected with a hydrolysis reaction kettle (7) in a working workshop (8).

3. The waste gas collection and reuse device for emptying of furfural according to claim 2, characterized in that: The decompression cooling device (1) is composed of a first stainless steel pipe (9), a second stainless steel pipe (10), a third stainless steel pipe (11), a primary spraying assembly (12) and a first connecting pipe (13), the first stainless steel pipe (9) is fixedly connected with a gas outlet pipe of the hydrolysis reaction kettle (7), the second stainless steel pipe (10) is fixedly installed at the tail end of the first stainless steel pipe (9), the third stainless steel pipe (11) is fixedly installed at the tail end of the second stainless steel pipe (10), the first connecting pipe (13) is fixedly installed at the tail end of the third stainless steel pipe (11), the first connecting pipe (13) passes through the tail end of the gas collecting chamber (2) and is located above the circulating water collecting tank (3), and the primary spraying assembly (12) is fixedly installed on the third stainless steel pipe (11).

4. The waste gas collection and reuse device for emptying of furfural according to claim 3, characterized in that: An overflow pipe (15) and a cooling liquid recovery pipe (16) are arranged on the circulating water collecting tank (3), and a first water pump (17) is fixedly installed on the cooling liquid recovery pipe (16).

5. The waste gas collection and reuse device for emptying of furfural according to claim 4, characterized in that: The secondary spraying assembly (4) is connected with the circulating water collecting tank (3) through a second connecting pipe (18), and a second water pump (19) is fixedly installed on the second connecting pipe (18).

6. The waste gas collection and reuse device for emptying of furfural according to claim 5, characterized in that: The gas-liquid separator (5) is provided with a flow collecting pipe (21), and the flow collecting pipe (21) is fixedly connected with the cooling liquid recovery pipe (16).

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