Nitric acid vaporization mechanism and atmosphere circulation nitric acid degreasing furnace applying same

Abstract

The utility model relates to the technical field of nitric acid degreasing furnace equipment, in particular to a nitric acid vaporization mechanism and an atmosphere circulation nitric acid degreasing furnace using the same. The nitric acid vaporization mechanism comprises a vaporization box, and the vaporization box comprises at least one first box body and a nitric acid vaporization module installed on each first box body; each nitric acid vaporization module comprises a nitric acid liquid dropping module mounted on the first box body, a nitric acid vaporization piece mounted in the first box body and located under a liquid outlet of the nitric acid liquid dropping module, a heater for heating the nitric acid vaporization piece, and a temperature sensor for detecting the heating temperature of the heater. A nitric acid debinding furnace with atmosphere circulation comprises a gas inlet mechanism, a furnace body, a gas outlet mechanism, a nitric acid circulation mechanism and the like. According to the utility model, the sufficiency of vaporization of liquid nitric acid is ensured, and the amount of vaporization of liquid nitric acid can be controlled; nitric acid gas which is not completely reacted in the nitric acid degreasing furnace is continuously recovered through the circulating fan, so that the consumption of liquid nitric acid is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitric acid degreasing furnace equipment technical field, especially relates to a kind of nitric acid vaporization mechanism and the atmosphere circulation nitric acid degreasing furnace of application this mechanism. BACKGROUND

[0002] Nitric acid degreasing furnace is a kind of equipment mainly used in metal injection molding process to remove organic binder in green body, and high-efficiency degreasing is realized through nitric acid catalytic reaction. Its core function is to decompose polyformaldehyde binder to ensure that the product has high stability and low defect rate after degreasing.

[0003] In the prior art, liquid nitric acid is directly heated and vaporized by a heater, and then the vaporized nitric acid is injected into the furnace. However, the amount of liquid nitric acid vaporization is not easy to control. If the heating temperature is high, the amount of liquid nitric acid vaporization will be large, and the product will be over-degreased. If the heating temperature is low, the amount of liquid nitric acid vaporization will be small, and the product will not be sufficiently degreased. In addition, when liquid nitric acid is heated, misty liquid nitric acid may be mixed in the nitric acid gas. The liquid nitric acid accumulates in the furnace, causing serious corrosion damage to the furnace and the equipment inside the furnace. There is often unreacted nitric acid gas in the furnace, which is directly extracted by the waste gas treatment device, resulting in resource waste. The present application is proposed to solve the problems existing in the prior art. SUMMARY

[0004] The utility model aims to provide a kind of nitric acid vaporization mechanism and the atmosphere circulation nitric acid degreasing furnace of application this mechanism, to solve the problem of the amount of liquid nitric acid vaporization not easy to control in prior art.

[0005] The technical scheme of the utility model is as follows: a kind of nitric acid vaporization mechanism, comprising: vaporization box, the vaporization box includes at least one first box body, nitric acid vaporization module installed on each first box body;Each first box body is provided with box inlet, box outlet;Each nitric acid vaporization module includes nitric acid droplet module installed on the first box body, nitric acid vaporization piece installed inside the first box body and located below the liquid outlet of nitric acid droplet module, heater for heating nitric acid vaporization piece, temperature sensor for detecting the heating temperature of heater.

[0006] Preferably, the nitric acid droplet module includes a dropper and a nitric acid liquid supply module connected to the dropper, and the dropper is installed on the top plate of each first box body.

[0007] The nitric acid vaporization piece is a plurality of glass marbles stacked in a pyramid shape, and the nitric acid droplets in the dropper drop on the topmost glass marble.

[0008] Preferably, the first box body is provided with a second box body at the lower end, and the heater is installed in the second box body.

[0009] The nitric acid liquid supply module comprises a nitric acid pump connected with the dropper, and a nitric acid barrel connected with the nitric acid pump.

[0010] The utility model discloses further provide technical scheme is: an atmosphere circulation's nitric acid degreasing furnace, including:

[0011] Air inlet mechanism, including the protection gas supply assembly that communicates in proper order, above-mentioned nitric acid vaporization mechanism, air inlet pipe;

[0012] Furnace body, the inside of furnace body is provided with multiple furnace lining units that communicate with each other, the inner chamber of each furnace lining unit is communicated left furnace lining pipeline and right furnace lining pipeline, left furnace lining pipeline and right furnace lining pipeline are separately arranged at both sides of the width direction of furnace lining unit;

[0013] Air outlet mechanism, including the air outlet pipe that communicates with left furnace lining pipeline and / or right furnace lining pipeline;

[0014] Nitric acid circulation mechanism, including the circulation left air pipe that communicates with multiple left furnace lining pipelines, the circulation right air pipe that communicates with multiple right furnace lining pipelines, circulation fan;Air inlet pipe is communicated with circulation left air pipe;Circulation fan extracts the atmosphere in multiple furnace lining units through circulation left air pipe and then merges with the gas in air inlet pipe, and then is punched into multiple furnace lining units through circulation right air pipe respectively;

[0015] Combustion device, the air inlet of combustion device is communicated with the air outlet of air outlet pipe.

[0016] Preferably, each furnace lining unit includes an upper lining plate, a right lining plate, a lower lining plate, and a left lining plate connected in sequence, a plurality of air holes are uniformly arranged on the left lining plate and the right lining plate, the plurality of air holes on the right lining plate are in communication with the left furnace lining pipeline as a whole, and the plurality of air holes on the right lining plate are in communication with the right furnace lining pipeline as a whole.

[0017] Preferably, the protection gas supply assembly includes a protection gas storage tank and a gas heating box in communication with the protection gas storage tank, the air outlet of the gas heating box is in communication with the air inlet of each tank body, and the air outlet of each tank body is in communication with the air inlet of the air inlet pipe.

[0018] Preferably, the air inlet pipeline includes a main air inlet pipe in communication with the air outlet of each tank body and a plurality of branch air inlet pipes in communication with the main air inlet pipe, and the plurality of branch air inlet pipes are in communication with the circulation left air pipe.

[0019] Preferably, the air outlet pipe includes a plurality of branch air outlet pipes in one-to-one correspondence with the plurality of left furnace lining pipelines and / or right furnace lining pipelines, and a main air outlet pipe in communication with the plurality of branch air outlet pipes, and the air outlet of the main air outlet pipe is in communication with the air inlet of the combustion device.

[0020] Preferably, the circulating left air pipe comprises a plurality of branch circulating left air pipes communicated with a plurality of left furnace lining pipes one by one, and a main circulating left air pipe communicated with the plurality of branch circulating left air pipes;

[0021] The circulating right air pipe comprises a plurality of branch circulating right air pipes communicated with a plurality of right furnace lining pipes one by one, and a main circulating right air pipe communicated with the plurality of branch circulating right air pipes.

[0022] The main circulating left air pipe and the main circulating right air pipe are connected to the air inlet and the air outlet of the circulating fan, respectively.

[0023] Preferably, the main air inlet pipe is communicated with an air inlet fan, and the main air outlet pipe is communicated with an air outlet fan.

[0024] Compared with the prior art, the utility model has the advantages that:

[0025] (1) The utility model relates to a nitric acid vaporization mechanism, including vaporization box, vaporization box includes at least a first box, nitric acid vaporization module is installed on each first box, each nitric acid vaporization module includes the dropper of installation on the first box, nitric acid pump, nitric acid barrel, is installed in the first box inside and is located the liquid outlet of nitric acid droplet module directly below the pyramidal multiple glass marbles, the heater of heating to multiple glass marbles, temperature sensor for detecting the heating temperature of heater, liquid nitric acid drops from the dropper and drops on the glass marble on the top of the pyramidal multiple glass marbles, and the nitric acid droplet flows down along the surface of the multiple glass marbles, and then is vaporized after being heated by the glass bead, and the nitric acid droplet can be completely vaporized on the pyramidal multiple glass marbles, so that the sufficiency of vaporization is guaranteed, and no liquid nitric acid is present in the hearth, and the utility model can realize controllable vaporization of liquid nitric acid.

[0026] (2) The utility model relates to a nitric acid degreasing furnace of atmosphere circulation, include: air inlet mechanism, furnace body, air outlet mechanism, nitric acid circulation mechanism, combustion device, the utility model discloses through circulating fan continuously recovers the nitric acid gas that is not completely reacted in nitric acid degreasing furnace, and after mixing with fresh supplementary nitric acid gas, reinfuses the furnace cavity, significantly reduces the nitric acid consumption, simultaneously reduces the inert gas exhaust loss, and the system nitrogen gas supplement amount reduces. BRIEF DESCRIPTION OF DRAWINGS

[0027] The utility model will be further described in connection with the drawings and examples:

[0028] Figure 1 It is structure schematic diagram for the nitric acid vaporization mechanism described in the embodiment:

[0029] Figure 2 It is the top view structure schematic diagram of air inlet mechanism of the nitric acid degreasing furnace of atmosphere circulation described in the embodiment:

[0030] Figure 3 Figure 6 is a right view schematic diagram of the atmosphere circulating nitric acid degreasing furnace according to the embodiment;

[0031] Figure 4 Figure 7 is a partial top view schematic diagram of the atmosphere circulating nitric acid degreasing furnace according to the embodiment, in which the gas inlet pipe and the gas outlet pipe are hidden;

[0032] Figure 5 Figure 8 is a partial front view schematic diagram of the atmosphere circulating nitric acid degreasing furnace according to the embodiment, in which the gas inlet pipe and the gas outlet pipe are hidden;

[0033] Figure 6 Figure 9 is a partial front view schematic diagram of the atmosphere circulating nitric acid degreasing furnace according to the embodiment, in which the branch circulating left air pipe and the branch circulating right air pipe are hidden.

[0034] Wherein: 10, the first box, 11, the box gas inlet, 12, the box gas outlet, 13, the dropper, 14, the second box, 15, the heater, 16, the glass marble, 17, the box body;

[0035] 20, the furnace body, 21, the furnace lining unit, 22, the left lining plate, 23, the right lining plate, 24, the left furnace lining pipe, 25, the right furnace lining pipe, 26, the nitrogen heating box, 27, the main gas inlet pipe, 28, the branch gas inlet pipe, 29, the branch gas outlet pipe, 210, the main gas outlet pipe, 211, the branch circulating left air pipe, 212, the main circulating left air pipe, 213, the circulating fan, 214, the main circulating right air pipe, 215, the branch circulating right air pipe, 216, the nitric acid vaporization mechanism, 217, the combustion device. DETAILED DESCRIPTION

[0036] The content of the utility model will be further described in detail in combination with specific embodiments:

[0037] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0038] As Figure 1 , Figure 2As shown, a nitric acid vaporization mechanism 216 includes: a vaporization box, the vaporization box includes at least one first box body 10, a nitric acid vaporization module installed on each first box body 10, the first box body 10 is made of 316 stainless steel; each first box body 10 is provided with a box inlet 11 and a box outlet 12; each nitric acid vaporization module includes a nitric acid droplet module installed on the first box body 10, a nitric acid vaporization piece installed inside the first box body 10 and located directly below the liquid outlet of the nitric acid droplet module, a heater 15 for heating the nitric acid vaporization piece, and a temperature sensor for detecting the heating temperature of the heater 15.

[0039] The nitric acid droplet module includes a dropper 13 and a nitric acid liquid supply module in communication with the dropper 13, and the dropper 13 is installed on the top plate of each first box body 10; the nitric acid vaporization piece is a plurality of glass marbles 16 stacked in a pyramid shape, and the nitric acid liquid droplets in the dropper 13 are on the topmost glass marble 16; in this embodiment, glass marbles 16 are used as the nitric acid vaporization piece, which has the best chemical stability based on glass, can resist corrosion of nitric acid, and has high cost performance. The first box body 10 is provided with a second box body 14 at the lower end, and the heater 15 is installed in the second box body 14; the nitric acid liquid supply module includes a nitric acid pump in communication with the dropper 13 and a nitric acid barrel in communication with the nitric acid pump. In this embodiment, an adjusting valve is provided between the nitric acid pump and the nitric acid barrel, and the valve opening is manually or automatically adjusted to control the flow rate of the nitric acid liquid, or the operating parameters of the nitric acid pump, so that the dripping speed of the dropper 13 and the amount of each nitric acid liquid droplet can be controlled.

[0040] In this embodiment, two first box bodies 10 and two nitric acid vaporization modules are used, and two heaters 15 are installed in the second box body 14; the two heaters 15 heat the stacked glass marbles 16 in the two first box bodies 10 through air heat conduction; the stacked glass marbles 16 are placed in a stainless steel box 17, and a maintenance window is installed on each first box body 10, through which the glass marbles 16 can be taken out for cleaning; during daily work, only one set of nitric acid vaporization module can be used, and when the glass marbles 16 in one first box body 10 are cleaned, the other set of nitric acid vaporization module can be used. When the nitric acid vaporization module is working, the liquid nitric acid drops from the dropper 13 drop by drop on the topmost glass marble 16 of the pyramid-shaped plurality of glass marbles 16, the nitric acid liquid droplets flow downward along the surface of the plurality of glass marbles 16, and then vaporize after being heated by the glass marbles 16, and the nitric acid liquid droplets can completely vaporize on the pyramid-shaped plurality of glass marbles, ensuring the sufficiency of the nitric acid liquid vaporization.

[0041] As shown in FIG. 1, a nitric acid vaporization mechanism 216 includes: a vaporization box, the vaporization box includes at least one first box body 10, a nitric acid vaporization module installed on each first box body 10, the first box body 10 is made of 316 stainless steel; each first box body 10 is provided with a box inlet 11 and a box outlet 12; each nitric acid vaporization module includes a nitric acid droplet module installed on the first box body 10, a nitric acid vaporization piece installed inside the first box body 10 and located directly below the liquid outlet of the nitric acid droplet module, a heater 15 for heating the nitric acid vaporization piece, and a temperature sensor for detecting the heating temperature of the heater 15. Figures 3-5As shown, the utility model also provides technical scheme is: an atmosphere circulation's nitric acid degreasing furnace, include: air intake mechanism, furnace body 20, air outlet mechanism, nitric acid circulation mechanism, combustion device 217, air intake mechanism includes the protection gas supply assembly, above-mentioned's one nitric acid vaporization mechanism 216, air inlet pipe that links to each other in turn, furnace body 20, the inside of furnace body 20 is provided with multiple furnace lining units 21 that intercommunicate, the inner chamber of each furnace lining unit 21 is connected left furnace lining pipeline 24 and right furnace lining pipeline 25, left furnace lining pipeline 24 and right furnace lining pipeline 25 are divided and arranged at the both sides of the width direction of furnace lining unit 21, air outlet mechanism includes the air outlet pipe that links to each other with left furnace lining pipeline 24 and / or right furnace lining pipeline 25, nitric acid circulation mechanism includes the circulation left air pipe that links to each other with multiple left furnace lining pipeline 24, the circulation right air pipe that links to each other with multiple right furnace lining pipeline 25, circulation fan 213, air inlet pipe links to each other with circulation left air pipe, circulation fan 213 extracts the atmosphere in multiple furnace lining units 21 through circulation left air pipe, then with the gas in air inlet pipe, again through circulation right air pipe and hit into multiple furnace lining units 21 respectively, combustion device 217, the air inlet of combustion device 217 links to each other with the air outlet of air outlet pipe, and the generated waste gas is discharged after incineration, avoids environmental pollution.

[0042] Each furnace lining unit 21 includes sequentially connected upper lining plate, right lining plate 23, lower lining plate, left lining plate 22, multiple air holes are uniformly arranged on left lining plate 22 and right lining plate 23, and the multiple air holes on right lining plate 23 are connected with left furnace lining pipeline 24 as a whole, and the multiple air holes on right lining plate 23 are connected with right furnace lining pipeline 25 as a whole. The protection gas supply assembly includes a protection gas storage tank, a gas heating box connected with the protection gas storage tank, the gas outlet of the gas heating box is connected with each box inlet 11, and each box outlet 12 is connected with the air inlet of the air inlet pipe. In this embodiment, the protection gas is nitrogen, the protection gas storage tank is a nitrogen tank, and the gas heating box is a nitrogen heating box 26.

[0043] As shown in Figure 2 、 Figure 3 、 Figure 5 , the air inlet pipeline includes a main air inlet pipe 27 connected with each box outlet 12, multiple branch air inlet pipes 28 connected with the main air inlet pipe 27, and the multiple branch air inlet pipes 28 are connected with the circulation left air pipe. Figure 2As shown, the exhaust pipe includes multiple outlet exhaust pipes 29 that are connected one-to-one with multiple left furnace lining pipes 24 and / or right furnace lining pipes 25, and a main exhaust pipe 210 that is connected to the multiple outlet exhaust pipes 29. The exhaust port of the main exhaust pipe 210 is connected to the air inlet of the combustion device 217. That is, the multiple exhaust branch pipes can be set on the left side of the furnace lining unit 21 and connected to the left furnace lining pipes 24, or the multiple exhaust branch pipes can be set on the right side of the furnace lining unit 21 and connected to the right furnace lining pipes 25, or the multiple exhaust branch pipes can be symmetrically set on the left and right sides of the furnace lining unit 21 and connected to the left furnace lining pipes 24 and the right furnace lining pipes 25 respectively. Preferably, the multiple exhaust branch pipes are set to be connected to the left furnace lining pipes 24 and the right furnace lining pipes 25 respectively. Later, the customer can choose the position where the exhaust gas is discharged from the inner cavity of the furnace lining unit 21 according to different process requirements, and the unused exhaust branch pipes can be blocked.

[0044] like Figure 3 As shown, the circulating left air duct includes multiple branch circulating left air ducts 211 that are connected to multiple left furnace lining pipes 24 in a one-to-one correspondence, and a main circulating left air duct 212 that is connected to multiple branch circulating left air ducts 211; the circulating right air duct includes multiple branch circulating right air ducts 215 that are connected to multiple right furnace lining pipes 25 in a one-to-one correspondence, and a main circulating right air duct 214 that is connected to multiple branch circulating right air ducts 215; the main circulating left air duct 212 and the main circulating right air duct 214 are respectively connected to the air inlet and air outlet of the circulating fan 213. The main air inlet pipe 27 is connected to the air intake fan, and the main air outlet pipe 210 is connected to the exhaust fan.

[0045] The working principle of the nitric acid degreasing furnace with atmosphere circulation in this embodiment is as follows: the nitrogen tank supplies gas to the nitrogen heating box 26, the nitrogen heating box 26 heats the nitrogen, and then the nitrogen enters the nitric acid vaporization box. The nitric acid gas enters the main inlet pipe 27 along with the nitrogen, and then the nitrogen and nitric acid gas are pushed into multiple branch inlet pipes 28 by the air blower and enter the main circulation left air pipe 212. At the same time, the circulation fan 213 extracts the unreacted nitric acid gas and nitrogen from multiple furnace lining units 21 and merges them with the newly entered nitrogen and nitric acid gas in the main circulation left air pipe 212. The circulation fan 213 then pushes the merged gas into multiple furnace lining units 21 through the main circulation right air pipe 214 and multiple branch circulation right air pipes 215 in sequence, realizing the recycling of nitric acid gas. The exhaust gas discharged from the nitric acid degreasing furnace is sent to the combustion device 217 for combustion by the exhaust fan through multiple outlet air pipes 29 and the main outlet air pipe 210 in sequence.

[0046] The utility model discloses a circulation fan 213 is continued recovery nitric acid degreasing furnace in the nitric acid gas of not complete reaction, and after mixing with fresh supplement nitric acid gas, injects the furnace cavity again, and the nitric acid consumption is reduced significantly, reduces the inactivity gas exhaust loss simultaneously, and the system nitrogen gas supplement amount reduces. Nitrogen gas is used as the carrier gas of nitric acid gas, after the uniform heating in nitrogen gas heating box 26, is fully mixed with nitric acid gas and forms stable gaseous catalytic system, and improves the degreasing efficiency.

[0047] The above examples are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable the person skilled in the art to understand the content of the utility model and to implement it, and it cannot limit the protection scope of the utility model. For those skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the utility model, therefore, no matter from which point, the examples should be regarded as exemplary, and are non-restrictive, the scope of the utility model is defined by the appended claims instead of the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.

Claims

1. A nitric acid vaporization mechanism, characterized in that, The application relates to a nitric acid vaporization device. The vaporization device comprises a vaporization box, a first box body, a nitric acid vaporization module installed on each first box body, a box air inlet and a box air outlet arranged on each first box body, a nitric acid droplet module installed on the first box body, a nitric acid vaporization piece installed inside the first box body and located directly below the liquid outlet of the nitric acid droplet module, a heater for heating the nitric acid vaporization piece, and a temperature sensor for detecting the heating temperature of the heater.

2. A nitric acid vaporization mechanism according to claim 1, characterized by: The nitric acid droplet module comprises a dropper and a nitric acid liquid supply module connected with the dropper. The nitric acid vaporization piece is a plurality of glass beads stacked in a pyramid shape, and the nitric acid liquid drops in the dropper are dropped on the topmost glass bead.

3. A nitric acid carburetion mechanism according to claim 2, characterized in that: The first box body is provided with a second box body at the lower end, and the heater is installed in the second box body. The nitric acid liquid supply module comprises a nitric acid pump connected with the dropper and a nitric acid barrel connected with the nitric acid pump.

4. An atmosphere circulating nitric acid degreasing furnace characterized by comprising: The application relates to a nitric acid vaporization device. The application relates to a nitric acid vaporization device. The application relates to a nitric acid vaporization device. The application relates to a nitric acid vaporization device. The application relates to a nitric acid vaporization device. The application relates to a nitric acid vaporization device.

5. The atmosphere circulating nitric acid leaching furnace according to claim 4, wherein: The application relates to a nitric acid vaporization device.

6. The atmosphere circulating nitric acid leaching furnace according to claim 4, wherein: The application relates to a nitric acid vaporization device.

7. The atmosphere circulating nitric acid leaching furnace according to claim 4, wherein: The application relates to a nitric acid vaporization device.

8. The atmosphere circulating nitric acid leaching furnace according to claim 7, characterized in that: The application relates to a nitric acid vaporization device.

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The circulating right air pipe comprises a plurality of branch circulating right air pipes communicated with a plurality of right furnace lining pipes one by one, and a main circulating right air pipe communicated with the plurality of branch circulating right air pipes. The main circulating left air pipe and the main circulating right air pipe are connected to the air inlet and the air outlet of the circulating fan respectively.

10. The atmosphere circulating nitric acid leaching furnace according to claim 8, wherein: The main air inlet pipe is communicated with an air inlet fan, and the main air outlet pipe is communicated with an air outlet fan.

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