A multi-layer back-spraying dust removal and condensation phase change white elimination system for smelting slag granulation tail gas

Abstract

The utility model discloses a kind of smelting furnace slag granulation tail gas multilayer reverse spray dust removal and condensing phase change white elimination system, including 1# gas hood, 2# gas hood, venturi gas collection pipeline, butterfly valve, main exhaust duct, spraying system;1# gas hood is located above flash furnace, 2# gas hood is located above lean furnace;The bottom of gas hood is rectangle, top is the cone of round, it is easy to gas collection;Butterfly valve is connected on the top pipeline of gas hood;The import of venturi gas collection pipeline is thick, and the export is thin, two gas hood discharge port positions are connected with venturi gas collection pipeline;Two venturi gas collection pipeline exports are connected to main exhaust duct, and the bottom in main exhaust duct is equipped with spraying device.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical technology, specifically relating to a multi-layer reverse spray dust removal and condensation phase change whitening system for granulated tail gas of smelting furnace slag. Background Technology

[0002] The smelting slag treatment employs an "air quenching + water cooling" process. Specifically, the high-temperature slag is dispersed by compressed air and then cooled by flushing water. However, the heat exchange process between the flushing water and the high-temperature air-disintegrated slag generates a large amount of dust-laden steam. The exhaust gas contains a small amount of acid mist, which corrodes equipment and facilities, posing a safety hazard. Furthermore, the high dust content in the exhaust gas fails to meet atmospheric pollutant emission requirements. Utility Model Content

[0003] The technical solution adopted in this invention is as follows: A granulated flue gas outlet is designed at the top of the gas collection hood. Venturi pipes are designed at the outlet positions of the two gas collection hoods for primary dust removal and condensation. The Venturi outlets converge into a T-junction pipe before the main pipe. After converging in the main pipe, the flue gas is led to high altitude. During the movement of steam in the pipe, interaction occurs, and partial condensation occurs, achieving the effect of water resource recovery. A multi-layer reverse spray system is designed inside the Venturi pipe to reduce the dust and steam content of the flue gas. After the granulated flue gas undergoes dust and steam removal through spraying, it is discharged at high altitude in compliance with standards.

[0004] The system is simple in design, has a short process, is easy to operate, convenient to maintain, and has a low cost, which greatly reduces the labor intensity of workers.

[0005] This process system mainly consists of a gas collection hood, a Venturi gas collection pipe, valves, a main exhaust pipe, and a spray system.

[0006] Gas collection hood: It is a cone-shaped structure with a rectangular bottom and a circular top, which facilitates gas collection.

[0007] Venturi gas collector: with a wide inlet and a narrow outlet, it utilizes the Venturi principle to accelerate the exhaust gas flow within the pipe.

[0008] Main exhaust pipe: Utilizing the thermal pressure effect, the negative pressure inside the pipe and at the pipe outlet promotes the accelerated flow and discharge of the granulated tail gas from the slag.

[0009] Spraying device: A spraying device was added to the bottom of the main pipeline, which is beneficial for cooling and dust removal of slag granulation tail gas, accelerating steam condensation, and achieving the function of recycling water resources.

[0010] The beneficial effects of this invention are as follows: The exhaust ports of the two gas collection hoods are designed with Venturi pipes for primary dust removal and condensation. The Venturi exhaust ports converge into a T-junction pipe before the main pipe. After converging in the main pipe, the flue gas is led to high altitude. During the movement of steam in the pipe, interaction occurs, resulting in partial condensation and achieving the effect of water resource recovery. The Venturi pipes are designed with multi-layer reverse spray systems to reduce the dust and steam content of the flue gas. After granulation and dust removal by spraying, the flue gas is discharged at high altitude in compliance with emission standards. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] In the diagram: 1—1# gas collection hood, 2—butterfly valve, 3—Venturi gas collection pipe, 4—main exhaust pipe, 5—sludge furnace gas collection pipe, 6—2# gas collection hood, 7—flash furnace 2# gas collection pipe. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0015] like Figure 1 As shown, a multi-layer reverse spray dust removal and condensation phase change whitening system for granulated tail gas of smelting furnace slag includes a No. 1 gas collection hood, a No. 2 gas collection hood, a Venturi gas collection pipe, a butterfly valve, a main exhaust pipe, and a spray system; the No. 1 gas collection hood is located above the flash furnace, and the No. 2 gas collection hood is located above the lean furnace.

[0016] The bottom of the gas collection hood is rectangular and the top is a circular cone shape to facilitate gas collection; a butterfly valve 2 is connected to the pipe at the top of the gas collection hood; the inlet of the Venturi gas collection pipe 3 is coarse and the outlet is thin, and the outlets of both gas collection hoods are connected to Venturi gas collection pipes 3.

[0017] The outlets of the two Venturi gas collection pipes 3 are connected to the main exhaust pipe 4, and a spray device is installed at the bottom of the main exhaust pipe 4.

[0018] The design incorporates granulated flue gas outlets at the top of the gas collection hoods. Venturi pipes are installed at the outlet locations of both gas collection hoods for primary dust removal and condensation. The Venturi outlets converge at a T-junction pipe before the main duct. After converging on the main duct, the flue gas is led to high altitude. During its movement within the pipes, the steam interacts with each other, partially condensing, thus achieving water recovery. Multi-layer reverse spray systems are designed within the Venturi pipes to reduce dust and steam content in the flue gas. After granulated flue gas undergoes dust and steam removal via spraying, it is discharged at high altitude meeting emission standards.

[0019] The system is simple in design, has a short process, is easy to operate, convenient to maintain, and has a low cost, which greatly reduces the labor intensity of workers.

Claims

1. A multi-layer reverse spray dust removal and condensation phase change whitening system for granulated tail gas from smelting furnace slag, characterized in that, Includes 1# gas collection hood (1), 2# gas collection hood (6), Venturi gas collection pipe (3), butterfly valve (2), main exhaust pipe (4), and spray system; 1# gas collecting hood (1) is located above the flash furnace, and 2# gas collecting hood (6) is located above the lean furnace; The bottom of the gas collection hood is rectangular and the top is a circular cone to facilitate gas collection; a butterfly valve (2) is connected to the pipe at the top of the gas collection hood. The Venturi gas collection pipe (3) has a coarse inlet and a fine outlet, and both gas collection hood outlets are connected to the Venturi gas collection pipe (3). The outlets of the two Venturi gas collection pipes (3) are connected to the main exhaust pipe (4), and a spray device is provided at the bottom of the main exhaust pipe (4).

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