Waste steam recycling device for nitrocotton cooking barrel

Abstract

The invention provides a nitrocotton cooking barrel waste steam recycling device, and relates to the technical field of recycling devices, the nitrocotton cooking barrel waste steam recycling device comprises a barrel, the bottom of the barrel is provided with a water storage tank, two sides of the water storage tank are respectively provided with a water inlet interface and a water outlet interface, the water inlet interface is connected with a cold water pipeline, and the water outlet interface is connected with a hot water pipeline; by starting the hot water pump, the heated spraying water can be discharged from the water storage tank and enters the hot water heat preservation water tank along with the hot water pipeline, hot water can be stored through the hot water heat preservation water tank, and through the structure, the spraying water subjected to waste heat recovery can be taken out to be conveniently used in the later period; waste steam is effectively utilized to reduce energy waste; waste steam can be filtered through the filter to intercept nitrocotton fibers, liquid can be filtered through the Y-shaped filter, sulfur-containing gas discharged from the top is harmlessly discharged after being sprayed, absorbed and neutralized by a sodium hydroxide solution with the concentration of 1%, and therefore the gas and the liquid treated through the device do not contain toxic mixtures.

Description

Technical Field

[0001] The present invention relates to the technical field of recovery devices, and in particular to a device for recovering waste steam from a nitrocellulose boiling barrel. Background Art

[0002] In the processing of nitrocellulose, a cooking barrel is used. A large amount of high-temperature steam is consumed during the operation of the nitrocellulose cooking barrel for processing raw materials. After the nitrocellulose is processed, the nitrocellulose cooking barrel will discharge waste steam. The exhaust temperature of this waste steam is about 130°C, and it also contains fine nitrocellulose fibers and toxic sulfur-containing mixtures, which is not conducive to environmental protection. It consumes a large amount of energy while emitting a large amount of heat energy and hazardous waste, resulting in energy waste, which does not meet the requirements of carbon emissions and carbon compliance. For this reason, this application designs a nitrocellulose cooking barrel waste steam recovery and utilization device, which can recover the waste steam heat and filter harmful mixtures. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a device for recovering and utilizing waste steam from a nitrocellulose boiling barrel, which solves the problem that waste steam is generated during the processing of the existing nitrocellulose boiling barrel, resulting in energy waste.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A device for recycling waste steam from a nitrocellulose boiling barrel comprises a barrel, a water storage tank is provided at the bottom of the barrel, a water inlet interface and a drainage interface are provided on both sides of the water storage tank, the water inlet interface is connected to a cold water pipe, the drainage interface is connected to a hot water pipe, and the hot water pipe is connected to a hot water insulation water tank, manholes are provided at the upper and lower ends of the barrel, an exhaust channel is provided at the upper end of the barrel, and a magnetic flap level gauge is installed inside the water storage tank;

[0006] A heating filler layer is provided inside the cylinder, a welded plate heat exchanger is provided below the heating filler layer, a steam inlet channel is provided on one side of the cylinder, and the steam inlet channel is connected to the boiling and washing barrel through a steam pipe;

[0007] A receiving pipe is connected to the other side of the cylinder, and the receiving pipe is connected to the first spray pipe and the second spray pipe through a circulation pipe and an electric three-way valve. The first spray pipe and the second spray pipe are respectively installed with a number of spray heads, and the several spray heads are respectively arranged above and below the heating filler layer.

[0008] Preferably, the circulating pipe body is provided with a circulating pump, both ends of the circulating pump are connected to butterfly valves through rubber flexible joints, the butterfly valve at one end is connected to an electric three-way valve through a one-way valve, and the butterfly valve at the other end is connected to a receiving pipe;

[0009] The first spray pipe and the second spray pipe are respectively connected to the electric three-way valve, and the receiving pipe body is provided with a Y-type filter.

[0010] Preferably, the hot water pipe body is provided with a hot water pump, and both ends of the hot water pump are connected to butterfly valves through rubber flexible joints. One end of the hot water pipe body is installed with a Y-type filter and connected to the drainage interface.

[0011] Preferably, the cold water pipe body is sequentially provided with a one-way valve, a butterfly valve, a temperature sensor, and a digital pressure gauge.

[0012] Preferably, the exhaust end of the boiling and washing barrel is connected to a steam pipe, and the steam pipe body is sequentially provided with a digital pressure gauge, a temperature sensor, a filter, an electric butterfly valve, and a one-way valve, and the steam pipe is connected to the steam inlet channel.

[0013] Preferably, an electric control box is provided on the outside of the cylinder, and the electric control box is electrically connected to each hot water pump, temperature sensor, digital pressure and circulation pump meter respectively.

[0014] Preferably, the welded plate heat exchanger includes a plurality of heat exchange plates, and a fixed bracket is provided at both ends of the plurality of heat exchange plates. The two fixed brackets are connected by a connecting rod, and the lower ends of the two fixed brackets are installed at the bottom of the water tank through a support frame.

[0015] Preferably, heat exchange channels and heat channels are respectively provided inside the plurality of heat exchange plates.

[0016] Preferably, threaded bases are fixedly installed at both ends of the heat exchange channel, a liquid inlet pipe is installed on the threaded base at one end, the lower end of the liquid inlet pipe is connected to the water inlet interface through an extension pipe, and a liquid outlet pipe is installed on the threaded base at the other end, and the liquid outlet pipe opens downward.

[0017] Preferably, a steam inlet pipe is installed at one end of the heat flow channel, and the steam inlet pipe is connected to the steam inlet channel. A steam outlet pipe is installed at the other end of the heat flow channel, and a bend is provided at the upper end of the steam outlet pipe, and a guide cover is provided at the opening of the bend.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By starting the hot water pump, the heated spray water can be discharged from the water storage tank and enter the hot water insulation tank along the hot water pipe. The hot water can be stored in the hot water insulation tank. Through the above structure, the spray water that has completed waste heat recovery can be taken out for later use, effectively utilizing waste steam to reduce energy waste;

[0020] The waste gas can be filtered through the filter to intercept the nitrocellulose fiber, the liquid can be filtered through the Y-type filter, and the sulfur-containing gas discharged from the top is sprayed with % sodium hydroxide solution for absorption and neutralization and then discharged harmlessly, thereby ensuring that the gas and liquid treated by this application will not contain toxic mixtures.

[0021] 2. The cold water at the water inlet interface is sent into the liquid pipe through the extension pipe, so that the cold water enters the interior of several heat exchange plates to realize heat exchange operation with the exhaust steam in the heat flow channel, and the cold water after the heat exchange is completed will be discharged from the liquid outlet pipe at the other end. The downward design of the opening of the liquid outlet pipe allows the cold water after the heat exchange to enter the water storage tank and cooperate with the circulation pipe for circulation heating. Through the above structure, the present application can perform efficient heat exchange when the cold water enters, and after the initial heat exchange, it can cooperate with the subsequent circulation spray to realize continuous heat exchange operation.

[0022] 3. The steam inlet pipe is connected to the steam pipe so that the exhaust steam from the boiling and washing barrel can enter the interior of the cylinder and realize heat exchange with cold water along the heat flow channel. After the heat exchange is completed, the gas will be discharged outward. A guide cover is provided at the opening of the elbow to prevent the spray water from above from entering the heat flow channel and interfering with the heat exchange of the welded plate heat exchanger, thereby improving the stability of this application. The gas after the heat exchange is finally discharged from the exhaust channel.

[0023] 4. By starting the circulation pump, the circulation pump uses the receiving pipe to extract the liquid inside the water tank, and transports the liquid to the first spray pipe and the second spray pipe respectively through the electric three-way valve, and finally discharges it from the corresponding spray head. Through the above structure, the present application can continuously circulate heat exchange spray water, so that the system spray water can be circulated and heated to ensure that the spray water can be heated to the required temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a three-dimensional structural diagram of a welded plate heat exchanger;

[0026] Figure 3 This is a three-dimensional structural diagram of a welded plate heat exchanger from another perspective;

[0027] Figure 4 It is a schematic diagram of the front structure of the welded plate heat exchanger;

[0028] Figure 5 It is a schematic diagram of the top view of the welded plate heat exchanger.

[0029] Figure: 1. Cylinder; 101. Manhole; 102. Water storage tank; 103. Magnetic flap level gauge; 104. Water inlet; 105. Drainage interface; 106. Exhaust channel; 2. Heating filler layer; 3. Cold water pipe; 4. Steam inlet channel; 5. Steam pipe; 501. Boiler and wash bucket; 6. Welded plate heat exchanger; 601. Fixing bracket; 602. Heat exchange plate; 603. Connecting rod; 604. Support frame; 605. Heat exchange flow channel; 6051. Threaded base; 6052. Liquid inlet pipe; 6053. Extension pipe; 6054. Liquid outlet pipe; 606. Heat exchanger Flow channel; 6061, steam inlet pipe; 6062, steam outlet pipe; 6063, elbow; 6064, guide cover; 7, hot water pipe; 701, hot water insulation tank; 8, circulation pipe; 801, first spray pipe; 802, receiving pipe; 803, second spray pipe; 804, sprinkler head; 9, electric control box; 10, temperature sensor; 11, digital pressure gauge; 12, filter; 13, electric butterfly valve; 14, one-way valve; 15, butterfly valve; 16, hot water pump; 17, Y-type filter; 18, electric three-way valve; 19, rubber flexible joint; 20, circulation pump. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figures 1 to 5 As shown, a device for recycling waste steam from a nitrocellulose boiling barrel comprises a barrel 1, a water storage tank 102 is provided at the bottom of the barrel 1, a water inlet interface 104 and a drainage interface 105 are provided on both sides of the water storage tank 102, the water inlet interface 104 is connected to the cold water pipe 3, the drainage interface 105 is connected to the hot water pipe 7, and the hot water pipe 7 is connected to the hot water insulation water tank 701, manholes 101 are provided at the upper and lower ends of the barrel 1, an exhaust channel 106 is provided at the upper end of the barrel 1, and a magnetic flap liquid level gauge 103 is installed inside the water storage tank 102;

[0032] A heating packing layer 2 is provided inside the cylinder 1, and a welded plate heat exchanger 6 is provided below the heating packing layer 2. A steam inlet channel 4 is provided on one side of the cylinder 1, and the steam inlet channel 4 is connected to the boiling and washing barrel 501 through a steam pipe 5;

[0033] A receiving pipe 802 is connected to the other side of the cylinder 1, and the receiving pipe 802 is connected to the first spray pipe 801 and the second spray pipe 803 through the circulation pipe 8 and the electric three-way valve 18. The first spray pipe 801 and the second spray pipe 803 are respectively installed with several spray heads 804, and the several spray heads 804 are respectively arranged above and below the heating filler layer 2.

[0034] The magnetic flap level gauge 103 can be used to monitor the current liquid level inside the water tank 102 in real time, and high / medium / low water level control / warning settings are used to facilitate control of the current liquid level. The heating filler layer 2 is made of SUS304 stainless steel for auxiliary silencer, and is divided into five groups in a combined setting. Each group can be individually withdrawn for inspection and cleaning, making it convenient for compressed air or water to flush the accumulated fibers. The heating filler layer 2 is beneficial to the separation of gas and liquid in the gas.

[0035] In this embodiment, a circulation pump 20 is provided on the circulation pipe 8. Both ends of the circulation pump 20 are connected to a butterfly valve 15 via a rubber flexible joint 19. The butterfly valve 15 at one end is connected to the electric three-way valve 18 via a one-way valve 14. The butterfly valve 15 at the other end is connected to the receiving pipe 802.

[0036] The first spray pipe 801 and the second spray pipe 803 are respectively connected to the electric three-way valve 18 , and the receiving pipe 802 is provided with a Y-type filter 17 .

[0037] By starting the circulation pump 20, the circulation pump 20 uses the receiving pipe 802 to extract the liquid inside the water tank 102, and transports the liquid to the first spray pipe 801 and the second spray pipe 803 respectively through the electric three-way valve 18, and finally discharges it from the corresponding spray head 804. Through the above structure, the present application can continuously circulate heat exchange spray water, so that the system spray water can be circulated and heated to ensure that the spray water can be heated to the required temperature.

[0038] In this embodiment, a hot water pump 16 is provided on the hot water pipe 7, and both ends of the hot water pump 16 are respectively connected to butterfly valves 15 through rubber flexible joints 19. One end of the hot water pipe 7 is installed with a Y-type filter 17 and connected to the drainage interface 105.

[0039] By starting the hot water pump 16, the heated spray water can be discharged from the water storage tank 102 and enter the hot water insulation tank 701 along the hot water pipe 7. The hot water can be stored in the hot water insulation tank 701. Through the above structure, the spray water that has completed waste heat recovery can be taken out for later use, effectively utilizing waste steam to reduce energy waste.

[0040] In this embodiment, the cold water pipe 3 is provided with a one-way valve 14 , a butterfly valve 15 , a temperature sensor 10 , and a digital pressure gauge 11 in sequence.

[0041] In this embodiment, the steam exhaust end of the boiling and washing tub 501 is connected to the steam pipe 5. The steam pipe 5 is sequentially equipped with a digital pressure gauge 11, a temperature sensor 10, a filter 12, an electric butterfly valve 13, and a one-way valve 14. The steam pipe 5 is connected to the steam inlet 4. The filter 12 is located at the steam inlet to intercept nitrocellulose fibers.

[0042] An electric control box 9 is provided outside the cylinder 1 , and the electric control box 9 is electrically connected to each hot water pump 16 , the temperature sensor 10 , the digital pressure gauge 11 , and the circulation pump 20 .

[0043] In this application, the welded plate heat exchanger 6 includes a plurality of heat exchange plates 602, each of which is provided with a fixing bracket 601 at each end. The two fixing brackets 601 are connected by a connecting rod 603. The lower ends of the two fixing brackets 601 are mounted on the bottom of the water storage tank 102 via a support frame 604. By placing the welded plate heat exchanger 6 at the bottom of the water storage tank 102, the exhaust steam heat can be better absorbed.

[0044] Among them, a heat exchange channel 605 and a heat channel 606 are respectively provided inside the heat exchange plates 602.

[0045] It should be noted that threaded bases 6051 are fixedly mounted at both ends of the heat exchange channel 605. A liquid inlet pipe 6052 is mounted on one end of the threaded base 6051. The lower end of the liquid inlet pipe 6052 is connected to the water inlet interface 104 via an extension pipe 6053. A liquid outlet pipe 6054 is mounted on the other end of the threaded base 6051. The outlet pipe 6054 opens downward. Cold water at the water inlet interface 104 is delivered to the liquid inlet pipe 6052 via the extension pipe 6053, allowing the cold water to enter the interior of the heat exchange plates 602 to exchange heat with the exhaust steam in the heat exchange channel 606. After the heat exchange is completed, the cold water is discharged from the outlet pipe 6054 at the other end. The downward opening of the outlet pipe 6054 allows the cold water to enter the water storage tank 102 after the heat exchange, and to be circulated and heated in the circulation pipe 8. This structure enables the present application to achieve efficient heat exchange when the cold water enters, and to achieve continuous heat exchange operation with the subsequent circulation spray after the initial heat exchange.

[0046] In the specific setting, a steam inlet pipe 6061 is installed at one end of the heat flow channel 606, and the steam inlet pipe 6061 is connected to the steam inlet channel 4. A steam outlet pipe 6062 is installed at the other end of the heat flow channel 606. A bend pipe 6063 is provided at the upper end of the steam outlet pipe 6062, and a guide cover 6064 is provided at the opening of the bend pipe 6063.

[0047] The steam inlet pipe 6061 is connected to the steam pipe 5, so that the exhaust steam from the boiling and washing barrel 501 can enter the interior of the cylinder 1 and realize heat exchange with cold water along the heat flow channel 606. After the heat exchange is completed, the gas will be discharged outward. A guide cover 6064 is provided at the opening of the elbow 6063 to prevent the spray water from above from entering the heat flow channel 606 and interfering with the heat exchange of the welded plate heat exchanger 6, thereby improving the stability of the present application. The gas after the heat exchange is finally discharged from the exhaust channel 106, and the sulfur-containing gas discharged from the top is sprayed with 25% sodium hydroxide solution for absorption and neutralization and then discharged harmlessly.

[0048] Among them, the equipment of this application is armored and insulated on site, the insulation thickness is not less than 50mm, the outer surface temperature of the insulation layer is not greater than 50℃, and the spray atomized water spray range is fully covered, so that the atomized water can be fully mixed with the steam, capture and absorb the heat of the steam, and prevent the steam from short-circuiting and overflowing the tower without spraying.

[0049] The working principle of the device for recycling waste steam from nitrocellulose boiling barrels:

[0050] During use, the electric butterfly valve 13 is first opened to allow the exhaust steam inside the boiling and washing tub 501 to enter the steam pipe 5 and be sent to one end of the welded plate heat exchanger 6. The butterfly valve 15 in the cold water pipe 3 is then opened to allow cold water to enter the other end of the welded plate heat exchanger 6. The cold water then enters the interior of the heat exchange plates 602 to exchange heat with the exhaust steam in the heat channel 606.

[0051] The circulating pump 20 is started to circulate the spray water, and the gas is discharged from the guide cover 6064 after heat exchange, and then moves upward, and exchanges heat with the spray water in the upward process;

[0052] During the heat exchange process, when the temperature sensor 10 senses that the mixed water temperature is lower than the set value, the hot water pump 16 is turned off and the circulation pump 20 is operated. When the heating temperature reaches the set value, the circulation pump 20 is turned off.

[0053] When the liquid level is high, the hot water pump 16 is turned on, and when the liquid level is low, it is turned off. Water is replenished to the high liquid level, and when the mixed water temperature is lower than the set value, the circulation pump 20 is turned on.

[0054] Finally, the spray water after the heat exchange is completed will be discharged from the hot water pipe 7 and stored in the hot water insulation tank 701 for recycling. The waste gas can be filtered by the filter 12 to intercept the nitrocellulose fiber, and the liquid can be filtered by the Y-type filter 17. The sulfur-containing gas discharged from the top is sprayed with 25% sodium hydroxide solution for absorption and neutralization and then discharged harmlessly, thereby ensuring that the gas and liquid treated by this application will not contain toxic mixtures.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A device for recovering and utilizing waste steam from a nitrocellulose steaming drum, comprising a drum (1), characterized in that: A water storage tank (102) is provided at the bottom of the cylinder (1), and a water inlet interface (104) and a drainage interface (105) are respectively provided on both sides of the water storage tank (102). The water inlet interface (104) is connected to the cold water pipe (3), and the drainage interface (105) is connected to the hot water pipe (7), and the hot water pipe (7) is connected to the hot water insulation tank (701). Manholes (101) are respectively provided at the upper and lower ends of the cylinder (1), and an exhaust channel (106) is provided at the upper end of the cylinder (1). A magnetic flap level gauge (103) is installed inside the water storage tank (102); A heating filler layer (2) is provided inside the cylinder (1), a welded plate heat exchanger (6) is provided below the heating filler layer (2), a steam inlet channel (4) is provided on one side of the cylinder (1), and the steam inlet channel (4) is connected to the boiling and washing bucket (501) through a steam pipe (5); The other side of the cylinder (1) is connected to a receiving pipe (802), and the receiving pipe (802) is connected to a first spray pipe (801) and a second spray pipe (803) through a circulation pipe (8) and an electric three-way valve (18). The first spray pipe (801) and the second spray pipe (803) are respectively installed with a plurality of spray heads (804), and the plurality of spray heads (804) are respectively arranged above and below the heating filler layer (2).

2. The device for recycling waste steam from a nitrocellulose boiling drum according to claim 1, characterized in that: The circulation pipe (8) is provided with a circulation pump (20), and both ends of the circulation pump (20) are connected to a butterfly valve (15) through a rubber flexible joint (19). The butterfly valve (15) at one end is connected to an electric three-way valve (18) through a one-way valve (14), and the butterfly valve (15) at the other end is connected to a receiving pipe (802); The first spray pipe (801) and the second spray pipe (803) are respectively connected to an electric three-way valve (18), and the receiving pipe (802) is provided with a Y-type filter (17).

3. The device for recycling waste steam from a nitrocellulose boiling drum according to claim 1, characterized in that: The hot water pipe (7) is provided with a hot water pump (16), and both ends of the hot water pump (16) are respectively connected to butterfly valves (15) through rubber flexible joints (19). One end of the hot water pipe (7) is installed with a Y-type filter (17) and is connected to a drainage interface (105).

4. The device for recycling waste steam from a nitrocellulose boiling drum according to claim 1, characterized in that: The cold water pipe (3) is provided with a one-way valve (14), a butterfly valve (15), a temperature sensor (10), and a digital pressure gauge (11) in sequence.

5. The device for recycling waste steam from a nitrocellulose boiling drum according to claim 1, characterized in that: The steam exhaust end of the boiling and washing bucket (501) is connected to a steam pipe (5); a digital pressure gauge (11), a temperature sensor (10), a filter (12), an electric butterfly valve (13), and a one-way valve (14) are sequentially provided on the body of the steam pipe (5); and the steam pipe (5) is connected to a steam inlet channel (4).

6. The device for recycling waste steam from a nitrocellulose boiling drum according to claim 5, characterized in that: An electric control box (9) is provided outside the cylinder (1), and the electric control box (9) is electrically connected to each hot water pump (16), temperature sensor (10), digital pressure gauge (11), and circulation pump (20).

7. The device for recycling waste steam from a nitrocellulose boiling drum according to claim 1, characterized in that: The welded plate heat exchanger (6) comprises a plurality of heat exchange plates (602), each of which is provided with a fixed bracket (601) at both ends. Two of the fixed brackets (601) are connected via a connecting rod (603), and the lower ends of the two fixed brackets (601) are mounted on the bottom of the water storage tank (102) via a support frame (604).

8. The device for recycling waste steam from a nitrocellulose boiling drum according to claim 7, characterized in that: Heat exchange channels (605) and heat channels (606) are respectively provided inside the plurality of heat exchange plates (602).

9. The device for recycling waste steam from a nitrocellulose boiling drum according to claim 8, characterized in that: Threaded bases (6051) are fixedly mounted at both ends of the heat exchange channel (605), a liquid inlet pipe (6052) is mounted on the threaded base (6051) at one end, the lower end of the liquid inlet pipe (6052) is connected to the water inlet interface (104) via an extension pipe (6053), and a liquid outlet pipe (6054) is mounted on the threaded base (6051) at the other end, the liquid outlet pipe (6054) opening downward.

10. The device for recycling waste steam from a nitrocellulose boiling drum according to claim 8, characterized in that: A steam inlet pipe (6061) is installed at one end of the heat flow channel (606), and the steam inlet pipe (6061) is connected to the steam inlet channel (4). A steam outlet pipe (6062) is installed at the other end of the heat flow channel (606), and a bend pipe (6063) is provided at the upper end of the steam outlet pipe (6062), and a guide cover (6064) is provided at the opening of the bend pipe (6063).

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