CN216790898U

CN216790898U - Cooling settling tank for collecting zinc oxide

Info

Publication number: CN216790898U
Application number: CN202123182283.0U
Authority: CN
Inventors: 王玉保; 于乐; 张冰冰
Original assignee: Dan Ke Luoyang Zinc Industry Ltd
Current assignee: Dan Ke Luoyang Zinc Industry Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-06-21
Anticipated expiration: 2031-12-17

Abstract

A cooling settling tank for collecting zinc oxide is of a multi-tank structure, all tanks are communicated through U-shaped pipes, and high-temperature flue gas containing zinc oxide particles is introduced into the cooling settling tank; a cooling pipe is arranged in the U-shaped pipe, and the cooling pipe is provided with a spiral fin; cooling pipes in the U-shaped pipes are communicated with each other, and cooling water is introduced into the cooling pipes; the cooling pipe is used for absorbing heat of the high-temperature flue gas. The cooling pipe with the spiral fins is arranged in the U-shaped pipe, so that sedimentation of zinc oxide particles is facilitated, and heat exchange efficiency is improved. The utility model recovers the heat contained in the high-temperature flue gas, and is beneficial to the sedimentation of zinc oxide particles and the post-treatment of the flue gas.

Description

Cooling settling tank for collecting zinc oxide

Technical Field

The utility model relates to the field of zinc oxide production, in particular to a cooling settling tank for collecting zinc oxide.

Background

The production method of the spontaneous combustion environment-friendly zinc oxide is different from direct zinc oxide and indirect zinc oxide, metal zinc is used as a raw material, the zinc oxide is produced by utilizing self hot melting, and the purposes of energy conservation and environment protection are achieved through a continuous automatic production mode. The zinc oxide produced by the method is greatly different from the traditional zinc oxide (direct method and indirect method) in chemical property and micro molecular structure. The production method of the spontaneous combustion environment-friendly zinc oxide is described in detail in patent No. CN 102874862B.

In the production process of the spontaneous combustion environment-friendly zinc oxide, the temperature in the oxidation furnace is 900-. The flue gas contains a large amount of zinc oxide particles and a small amount of impurity dust, the zinc oxide particles with larger particles are settled in the settling tank, and the zinc oxide particles with smaller particles and the impurity dust need to be recovered by using a filter bag dust collector. The existing problems are that firstly, the heat contained in the smoke is lost, and the energy is wasted. Secondly, the cooling effect of current settling box to the flue gas is not obvious, is unfavorable for the flue gas treatment of later stage.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the background art, the utility model discloses a cooling settling tank for collecting zinc oxide, which adopts the following technical scheme:

a cooling settling tank for collecting zinc oxide is of a multi-tank structure, all tanks are communicated through U-shaped pipes, and high-temperature flue gas containing zinc oxide particles is introduced into the cooling settling tank; a cooling pipe is arranged in the U-shaped pipe, and the cooling pipe is provided with a spiral fin; cooling pipes in the U-shaped pipes are communicated with each other, and cooling water is introduced into the cooling pipes; the cooling pipe is used for absorbing heat of the high-temperature flue gas.

Further improve technical scheme, the box is formed by the equipment of aluminum alloy sandwich rock wool board, has laid serpentine in the rock wool intermediate layer of aluminum alloy sandwich rock wool board, and the intraductal cooling tube of each U type communicates through serpentine each other.

Further improve technical scheme, the aluminium alloy sandwich rock wool board has the heat absorption coating on the aluminium alloy plate of one side towards the incasement spraying.

The technical scheme is further improved, a conical sedimentation hopper is arranged at the lower part of the box body, and a discharge conveyor belt is arranged below the sedimentation hopper.

Further improve technical scheme, be equipped with the baffle that is used for changing the high temperature flue gas flow direction in the box, the baffle is vertical to be set up.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

according to the utility model, the cooling pipe is arranged in the U-shaped pipe and is provided with the spiral fins. The helical fins can not block the flow of the high-temperature flue gas in the U-shaped pipe, and the high-temperature flue gas can generate rotational flow. On one hand, the rotational flow can increase friction and reduce the flow velocity of high-temperature flue gas; on the other hand, the probability of collision between the zinc oxide particles and the spiral fins can be greatly increased, and the flow velocity of the zinc oxide particles is reduced. Both of these aspects are more favorable for the settling of the zinc oxide particles. In the aspect of cooling, the helical fin has increased the heat transfer area of cooling tube with high temperature flue gas by a wide margin, has improved heat exchange efficiency, makes the temperature of flue gas reduce by a wide margin on the one hand, and on the other hand makes the cooling water vaporization, forms high temperature steam.

The utility model recovers the heat contained in the high-temperature flue gas, and is beneficial to the sedimentation of zinc oxide particles and the post-treatment of the flue gas.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a left side view of fig. 1.

In the figure: 1. a box body; 2. a U-shaped pipe; 3. a cooling tube; 4. a serpentine coil; 5. a partition plate; 6. and a discharge conveyor belt.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

A cooling and settling tank for collecting zinc oxide is shown in figure 1, and is of a multi-tank body 1 structure and provided with four tank bodies 1 arranged side by side, wherein the four tank bodies 1 are communicated through three groups of U-shaped pipes 2. As shown in FIG. 2, each set of U-shaped tubes 2 is arranged in five rows in the transverse direction. The left box body 1 is provided with an air inlet, high-temperature flue gas from an upstream oxidation furnace is introduced into the air inlet, and the high-temperature flue gas contains zinc oxide particles and impurity particles. The U-shaped pipe 2 is in the prior art, and the U-shaped pipe 2 can change the flow direction of high-temperature flue gas, reduces the flow velocity of zinc oxide particles in the high-temperature flue gas in the reversing process, and is favorable for settling the zinc oxide particles.

In order to solve the problems in the background art, a cooling pipe 3 is provided inside the U-shaped pipe 2. Unlike the conventional cooling pipe 3, the present cooling pipe 3 has a helical fin. The fins of the existing cooling tube 3 with fins are in a circular sheet shape, and a plurality of circular sheet-shaped fins are arrayed along the axial direction of the tube body. The cooling tube 3 has only one helical fin extending helically in the axial direction of the tube body. Compared with the circular fin, the spiral fin can not obstruct the flow of the high-temperature flue gas in the U-shaped pipe 2, and the high-temperature flue gas can generate rotational flow. On one hand, the rotational flow can increase friction and reduce the flow velocity of high-temperature flue gas; on the other hand, the probability of collision between the zinc oxide particles and the spiral fins can be greatly increased, and the flow velocity of the zinc oxide particles is reduced. Obviously, both aspects are more favorable for the sedimentation of the zinc oxide particles. In the aspect of cooling, the helical fins greatly increase the heat exchange area of the cooling pipe 3 and the high-temperature flue gas, improve the heat exchange efficiency, greatly reduce the temperature of the flue gas on the one hand, and vaporize the cooling water to form high-temperature steam on the other hand.

The box 1 is formed by the equipment of aluminum alloy sandwich rock wool board, has laid snakelike coil pipe 4 in the rock wool intermediate layer of aluminum alloy sandwich rock wool board, and the cooling tube 3 in the U type pipe 2 of arranging passes through snakelike coil pipe 4 series connection. Cooling water is introduced into the cooling pipe 3, and the cooling pipe 3 and the serpentine coil 4 are used for absorbing heat of high-temperature flue gas and outputting high-temperature steam. The serpentine coil 4 is mainly used for absorbing the heat of the flue gas in the box body 1. The rock wool interlayer of the aluminum alloy sandwich rock wool board has high temperature resistance and heat preservation performance. The aluminum alloy plate of the aluminum alloy sandwich rock wool plate has the advantages of corrosion resistance and good thermal conductivity. In order to improve the heat absorption capacity of the aluminum alloy plate, a heat absorption coating is sprayed on the aluminum alloy plate on one side, facing the inside of the box, of the aluminum alloy sandwich rock wool plate. In this way, the heat absorbed by the aluminium alloy sheet can be fully absorbed by the serpentine 4.

To further increase the settling effect, a baffle 5 is provided in the tank 1. The baffle 5 is vertically arranged and is arranged between the inlet and the outlet of the flue gas. The baffle 5 changes the flow direction of high-temperature flue gas in the box body 1, and is beneficial to the sedimentation of zinc oxide particles.

The settled zinc oxide particles fall into a conical settling hopper at the lower part of the box body 1. In order to facilitate discharging, a discharging conveyor belt 6 is arranged below the settling hopper, and the zinc oxide finished product is sent out of the cooling settling box through the discharging conveyor belt 6. The high-temperature steam generated by the cooling pipe 3 can be reused as a heat source of the dryer in the later treatment of the flue gas.

The present invention is not described in detail in the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A cooling settling tank for zinc oxide is collected, characterized by: the cooling settling tank is of a multi-tank structure, all tanks are communicated through U-shaped pipes, and high-temperature flue gas containing zinc oxide particles is introduced into the cooling settling tank; a cooling pipe is arranged in the U-shaped pipe, and the cooling pipe is provided with a spiral fin; cooling pipes in the U-shaped pipes are communicated with each other, and cooling water is introduced into the cooling pipes; the cooling pipe is used for absorbing heat of the high-temperature flue gas.

2. A cooling settler tank for zinc oxide collection as defined in claim 1, wherein: the box is formed by the equipment of aluminum alloy sandwich rock wool board, has laid serpentine in the rock wool intermediate layer of aluminum alloy sandwich rock wool board, and the intraductal cooling tube of each U type communicates each other through serpentine.

3. A cooling settler tank for zinc oxide collection as defined in claim 2, wherein: and a heat absorption coating is sprayed on the aluminum alloy plate on one side of the aluminum alloy sandwich rock wool plate facing the inside of the box.

4. A cooling settler tank for zinc oxide collection as defined in claim 1, wherein: the lower part of the box body is provided with a conical sedimentation hopper, and a discharge conveyor belt is arranged below the sedimentation hopper.

5. A cooling settler tank for zinc oxide collection as defined in claim 1, wherein: and a partition board for changing the flow direction of the high-temperature flue gas is arranged in the box body and is vertically arranged.