CN211612215U - Tail gas treatment device for fluorescent powder firing process - Google Patents

Abstract

The utility model discloses a tail gas processing apparatus for phosphor powder burns process, including the absorption tank that is equipped with dilute sulphuric acid solution, still including the first storage tank that is equipped with water, upper end and first storage tank bottom tube coupling's intake pipe and blast pipe, first storage tank and absorption tank pass through the intake pipe intercommunication, the intake pipe intercommunication is passed through with the external world to the absorption tank inner chamber, the air inlet has been seted up to the lateral wall of intake pipe, still including setting up in the first valve of intake pipe, first valve is located the air inlet top, absorption tank and intake pipe junction sealing connection, absorption tank and blast pipe junction sealing connection, the end submergence of giving vent to anger of intake pipe is in the dilute sulphuric acid solution of absorption tank, the end of giving vent to anger of blast pipe is higher than the dilute sulphuric acid solution liquid.

Description

Tail gas treatment device for fluorescent powder firing process

Technical Field

The utility model relates to a tail gas unit, concretely relates to tail gas processing apparatus for phosphor powder fires process.

Background

In the fluorescent powder sintering process, the process needs to be carried out in a reducing atmosphere, hydrogen is continuously introduced into a hearth in the sintering process, and then the hydrogen is discharged from an exhaust port of a sintering furnace; in addition, part of raw materials cannot exist stably in the form of oxides, and the oxides and carbon dioxide are formed by decomposing carbonic acid compounds at high temperature, so that the main components of the tail gas of the fluorescent powder are vaporized fluxing agents, fine powder, carbon dioxide and hydrogen, the tail gas of the fluorescent powder is nontoxic and is generally directly discharged into the air, but the fluxing agents have certain acidity and alkalinity and are easy to cause the acid and the alkaline of the surrounding environment after being discharged in a fixed place for a long time, so that the normal growth of surrounding organisms is influenced, a special treatment device for treating the tail gas generated in the fluorescent powder firing process is not provided at present, and the pipeline is easy to be blocked by cooling the high-temperature vaporized fluxing agents in the tail gas treatment device, so that the tail gas treatment device for the fluorescent powder firing process, which is used for preventing pipeline.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a tail gas treatment device for the fluorescent powder firing process, which can prevent the pipeline from being blocked.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a tail gas processing apparatus for phosphor powder burns process, including the adsorption tank who is equipped with dilute sulphuric acid solution, still including the first storage tank that is equipped with water, upper end and the intake pipe and the blast pipe of first storage tank bottom pipe connection, first storage tank and adsorption tank pass through the intake pipe intercommunication, the adsorption tank inner chamber passes through the blast pipe intercommunication with the external world, the air inlet has been seted up to the lateral wall of intake pipe, still including setting up in the first valve of intake pipe, first valve is located the air inlet top, adsorption tank and intake pipe junction sealing connection, adsorption tank and blast pipe junction sealing connection, the end submergence of giving vent to anger of intake pipe is in the dilute sulphuric acid solution of adsorption tank, the end of giving vent to anger of blast pipe is higher than the dilute.

As one of the technical scheme of the utility model, still including setting up the nylon 6 filter membrane of the system of organic in the absorption tank, two cavities about the inner chamber of nylon 6 filter membrane of the system of organic divide into the absorption tank, the bottom of absorption tank is equipped with first drainage hole, still including the second valve that is used for controlling the switching of first drainage hole, first drainage hole is located different cavities with the intake pipe.

As one of the preferred technical scheme of the utility model, the third valve of second wash port and being used for controlling the second wash port switching is seted up to the lateral wall of absorption tank, and the setting of second wash port highly is higher than the inlet end that gives vent to anger of intake pipe and is less than the blast pipe, and the second wash port is located same cavity with first wash port.

As one of the preferred technical scheme of the utility model, the lateral wall of first storage tank is equipped with the heating sleeve that is used for heating first storage tank.

As one of the preferable technical proposal of the utility model, the utility model also comprises an absorption tank filled with calcium hydroxide solution, and the air outlet end of the exhaust pipe is immersed in the calcium hydroxide solution.

As one of the preferred technical scheme of the utility model, still including second storage tank and the feed liquor pipe that is equipped with dilute sulfuric acid solution, feed liquor pipe upper end and second stock solution tank bottom pipe connection, feed liquor pipe lower extreme and absorption tank pipe connection, the second storage tank passes through feed liquor pipe intercommunication with the absorption tank, is equipped with the fourth valve that is used for controlling feed liquor pipe pipeline break-make on the feed liquor pipe, the combination department sealing connection of feed liquor pipe and absorption tank.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the air inlet pipe is flushed by water of the first storage tank, the fluxing agent is dissolved, the water flows into the absorption tank under the action of gravity, the alkaline fluxing agent is neutralized by the sulfuric acid solution, the acidic fluxing agent is dissolved in the dilute sulfuric acid solution, the air inlet pipe is prevented from being blocked by cooled fluxing agent crystals, an additional power mechanism is not needed by utilizing gravity flushing, and the structure is simple.

Drawings

Fig. 1 is a schematic structural view of the tail gas treatment device of the present invention.

Illustration of the drawings: 101. an absorption tank; 102. a second valve; 103. a third valve; 201. a first storage tank; 202. a first valve; 30. an air inlet pipe; 40. an exhaust pipe; 50. a seal ring; 60. an organic nylon 6 filter membrane; 70. heating the sleeve; 80. an absorption tank; 901. a second storage tank; 902. a liquid inlet pipe; 903. and a fourth valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "horizontal", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the present embodiment provides a tail gas treatment device for a phosphor powder firing process, including an absorption tank 101 containing a dilute sulfuric acid solution, further including a first storage tank 201 containing water, an intake pipe 30 and an exhaust pipe 40 having an upper end connected to a bottom pipeline of the first storage tank 201, the first storage tank 201 and the absorption tank 101 are communicated through the intake pipe 30, an inner cavity of the absorption tank 101 is communicated with the outside through the exhaust pipe 40, a side wall of the intake pipe 30 is provided with an air inlet, the tail gas treatment device further includes a first valve 202 disposed in the intake pipe 30, the first valve 202 is located above the air inlet, a joint of the absorption tank 101 and the intake pipe 30 is hermetically connected, the joint of the absorption tank 101 and the exhaust pipe 40 is hermetically connected, and an air outlet end of the intake pipe 30 is located below.

The working principle is as follows: the air inlet is connected with an air outlet pipeline of the sintering furnace, tail gas of the sintering furnace enters the air inlet pipe 30, the first valve 202 is opened at the moment, water in the first storage tank 201 is flushed from top to bottom under the action of gravity, the fluxing agent is dissolved in the water and flows downwards to the absorption tank 101, powder is deposited under the action of gravity, part of carbon dioxide is absorbed by dilute sulfuric acid solution, and the rest of carbon dioxide and hydrogen escape from the dilute sulfuric acid solution and are discharged through the exhaust pipe 40, so that the fluxing agent is effectively absorbed, and the fluxing agent is prevented from being directly discharged to the external environment. The first valve 202 may also be selectively opened during exhaust treatment, primarily to prevent blockage of the inlet line 30.

The sealing connection can be realized by the sealing ring 50 sleeved on the outer wall of the corresponding pipeline.

Still including setting up the nylon 6 filter membrane 60 of organic system in the absorption tank 101, the nylon 6 filter membrane 60 of organic system divides into two cavities about the inner chamber of absorption tank 101, and the bottom of absorption tank 101 is equipped with first drainage hole, still includes the second valve 102 that is used for controlling the opening and closing of first drainage hole, and first drainage hole and intake pipe 30 are located the different cavity. Because the concentration of the dilute sulfuric acid in the absorption tank 101 is limited, the dilute sulfuric acid solution must be replaced after a period of use, because the powder settles in the aqueous solution, especially the sintered fluorescent powder has high density and small particles, compact layering is easy to form, the drain hole is blocked, if the drain hole is not arranged at the bottom and the liquid in the absorption tank 101 is difficult to drain, the inner cavity of the absorption tank 101 is divided into two chambers by the organic nylon 6 filter membrane 60, the micropore diameter of the filter membrane is selected as the common knowledge in the art according to the size of the powder, the powder enters the absorption tank 101 through the air inlet pipe 30 and is blocked and deposited in one chamber by the organic nylon 6 filter membrane 60, the liquid and the gas are not affected, the first drain hole is arranged in the other chamber, the second valve 102 is opened, the liquid in the absorption tank 101 is smoothly discharged from the first drain hole, the organic acid-base nylon 6 filter membrane 60 can resist, can be used stably for a long time.

Further, the top of the absorption tank 101 can be opened, for example, by a pin-connected rotatable opening manner, so as to facilitate the removal of the settled powder.

In order to prevent the air inlet end of the exhaust pipe 40 from being sealed by liquid, the side wall of the absorption tank 101 is provided with a second drain hole and a third valve 103 for controlling the opening and closing of the second drain hole, the second drain hole is higher than the air outlet end of the air inlet pipe 30 and lower than the air inlet end of the exhaust pipe 40, and the second drain hole and the first drain hole are located in the same chamber. In order to prevent the exhaust pipe 40 from being closed by the dilute sulfuric acid solution in the absorption tank 101, the third valve 103 is opened to drain a part of the liquid when the liquid level in the absorption tank 101 is higher than the second drain hole.

In order to improve the solubility of the flux in water, the side wall of the first tank 201 is provided with a heating sleeve 70 for heating the first tank 201. The heating sleeve 70 is used to heat the water in the first storage tank 201, so as to improve the solubility and dissolution efficiency of the fluxing agent in the water. The structure and power supply of the heating sleeve 70 is conventional.

To absorb carbon dioxide, an absorption tank 80 containing a calcium hydroxide solution is further included, and the outlet end of the exhaust pipe 40 is immersed in the calcium hydroxide solution.

As one of the preferred technical scheme of the utility model, still including second storage tank 901 and the feed liquor pipe 902 that are equipped with dilute sulfuric acid solution, feed liquor pipe 902 upper end and second stock solution tank bottom pipe connection, feed liquor pipe 902 lower extreme and absorbent tank 101 pipe connection, second storage tank 901 passes through feed liquor pipe 902 with absorbent tank 101 and communicates, is equipped with the fourth valve 903 that is used for controlling feed liquor pipe 902 pipeline break-make on the feed liquor pipe 902, and feed liquor pipe 902 and absorbent tank 101's combination department sealing connection.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the principles of the present invention.

Claims (6)

1. A tail gas treatment device for a fluorescent powder firing process comprises an absorption tank filled with a dilute sulfuric acid solution, it is characterized by also comprising a first storage tank filled with water, an air inlet pipe and an air outlet pipe, wherein the upper end of the air inlet pipe is connected with a pipeline at the bottom of the first storage tank, the first storage tank is communicated with the absorption tank through the air inlet pipe, the inner cavity of the absorption tank is communicated with the outside through the exhaust pipe, the side wall of the air inlet pipe is provided with an air inlet, and the air inlet pipe also comprises a first valve arranged on the air inlet pipe, the first valve is positioned above the air inlet, the joint of the absorption tank and the air inlet pipe is in sealing connection, the absorption tank is connected with the joint of the exhaust pipe in a sealing manner, the gas outlet end of the gas inlet pipe is immersed in the dilute sulfuric acid solution of the absorption tank, and the gas outlet end of the exhaust pipe is higher than the liquid level of the dilute sulfuric acid solution of the absorption tank.

2. The device as claimed in claim 1, further comprising an organic nylon 6 filter disposed in the absorption tank, wherein the organic nylon 6 filter divides an inner cavity of the absorption tank into two chambers, a first drain hole is disposed at a bottom of the absorption tank, and a second valve is disposed at a bottom of the absorption tank for controlling the first drain hole to open and close, and the first drain hole and the air inlet pipe are disposed in different chambers.

3. The tail gas treatment device for a phosphor firing process as claimed in claim 2, wherein a second drain hole and a third valve for controlling the opening and closing of the second drain hole are formed in the side wall of the absorption tank, the second drain hole is higher than the air outlet end of the air inlet pipe and lower than the air inlet end of the air outlet pipe, and the second drain hole and the first drain hole are located in the same chamber.

4. The apparatus of any one of claims 1 to 3, wherein the sidewall of the first tank is provided with a heating sleeve for heating the first tank.

5. The apparatus of claim 1, further comprising an absorption tank containing a calcium hydroxide solution, wherein the outlet end of the exhaust pipe is immersed in the calcium hydroxide solution.

6. The tail gas treatment device for a phosphor firing process according to claim 1, further comprising a second storage tank containing a dilute sulfuric acid solution and a liquid inlet pipe, wherein the upper end of the liquid inlet pipe is connected with a pipeline at the bottom of the second storage tank, the lower end of the liquid inlet pipe is connected with the absorption tank, the second storage tank is communicated with the absorption tank through the liquid inlet pipe, a fourth valve for controlling the connection and disconnection of the liquid inlet pipe is arranged on the liquid inlet pipe, and the joint of the liquid inlet pipe and the absorption tank is hermetically connected.

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