Copper smelting flue gas pipeline

Abstract

The utility model belongs to the field of smelting, and particularly relates to a copper smelting flue gas pipeline, which comprises an anode furnace converting flue gas pipeline and an annular collecting flue gas pipeline, a heat exchange box is arranged on the anode furnace converting flue gas pipeline, and the heat exchange box is composed of a pipe barrel and plugging plates arranged at the two ends of the pipe barrel. A through hole for an environment flue gas pipeline connected with the bag-type dust collector to penetrate through is formed in the plugging plate, the through hole is in sealed connection with the outer pipe wall of the environment flue gas pipeline, and the flue gas inlet and the flue gas outlet in the pipe barrel are arranged on the pipe barrel in a staggered mode. According to the scheme, after anode furnace flue gas enters the heat exchange box, rotational flow is formed on the periphery of the environment flue gas pipeline, the stroke of airflow is increased, the heat transfer effect is improved, the structure is simple, the occupied space is small, the device can be directly arranged in the air at the intersection of the two flue gas pipelines, and a special site for placing large-size heat exchange equipment is not needed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the smelting field, concretely relates to a kind of special pipe design scheme that utilizes anode furnace smelting flue gas pipeline to heat the flue gas pipeline of ring collection cloth bag dust removal system. BACKGROUND

[0002] In copper smelting process, the flue gas temperature of anode furnace refining and blowing is high, and it needs to be cooled by using dilution air, plate cooling and other methods first, so that the flue gas temperature meets the dust removal requirements of subsequent processes.

[0003] A large amount of smoke and dust is dispersed in the environment of production plant such as flash furnace and converter plant, which needs to be collected by setting an environmental flue gas collection system, referred to as ring collection system. The ring collection system mainly adopts the way of cloth bag dust removal to form a ring collection cloth bag dust removal system. The ring collection flue gas has low temperature and high humidity. The water vapor in the flue gas will condense into liquid water when the temperature decreases. When entering the cloth bag, it is easy to cause condensation, dust adhesion and blockage, corrosion and other abnormal conditions, leading to damage of the filter bag and reduction of dust removal efficiency. Therefore, it is necessary to insulate the pipeline and bag-type dust collector box before the flue gas enters the cloth bag dust removal system, which will undoubtedly increase a large amount of additional energy consumption.

[0004] Therefore, if the excess heat in the high-temperature flue gas can be transferred to the low-temperature flue gas, the above waste of heat and energy can be avoided.

[0005] The scheme disclosed in the patent application with the title of "Vacuum superconducting heat pipe heat exchange device" (publication number CN101042286A) includes a tank for containing water, the tank is provided with a water inlet and a water outlet, and further includes a flue gas passage made of heat-conducting material, the flue gas passage is fixed inside the tank. When the flue gas inlet of the flue gas passage is connected with the flue gas outlet pipe of the boiler, and the flue gas outlet is connected with the atmosphere or the flue dust inlet of the dust collector, the boiler flue gas exchanges heat with the water in the tank through the flue gas passage. This scheme is a heat exchange between flue gas and water, and is not applicable to the heat exchange between flue gas and flue gas. Although this scheme realizes the heat exchange between the two media of flue gas and water, the heat exchange efficiency is low. The flue gas directly passes through the flue gas passage arranged inside the tank to transfer heat to the water in the tank. The ways to increase heat transfer are as follows: one is to arrange the flue gas passage as a bent pipe to increase the flue gas travel distance; the other is to arrange the flue gas passage with vacuum heat pipes filled with anhydrous ethanol on the pipe wall to increase heat dissipation. The heat transfer efficiency is low, the structure is complex, the land occupation is large, and it is not applicable to smelting enterprises with flue gas pipe network distributed above the plant. UTILITY MODEL CONTENTS

[0006] The utility model discloses a copper smelting flue gas pipeline, which is characterized in that a heat exchange box is arranged on the anode furnace smelting flue gas pipeline, the heat exchange box is composed of a pipe cylinder and a sealing plate arranged at both ends of the pipe cylinder, a through hole is formed in the sealing plate and penetrates the environmental flue gas pipeline connected with the bag-type dust collector, and the through hole and the outer pipe wall of the environmental flue gas pipeline are in sealing connection.

[0007] To achieve the above object, the utility model adopts the technical scheme of a copper smelting flue gas pipeline, which comprises an anode furnace smelting flue gas pipeline and a ringed flue gas pipeline.

[0008] The above scheme can realize the following effects: the heat exchange box can cover the environmental flue gas pipeline, the anode furnace flue gas forms a cyclone outside the environmental flue gas pipeline after entering the heat exchange box, the travel distance of the airflow is increased, the heat transfer effect is improved, the structure is simple, the space occupied is small, the heat exchange equipment can be arranged in the air at the intersection of the two flue gas pipelines, and a special place is not needed to place the heat exchange equipment with a large volume. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a three-dimensional schematic view of the utility model;

[0010] Figure 2 、 5 It is a plane schematic view of different embodiments

[0011] Figure 3 、 4 , 6 is a sectional schematic view of different embodiments. DETAILED DESCRIPTION

[0012] The technical scheme of the utility model will be further described in detail below with reference to the drawings.

[0013] A copper smelting flue gas pipeline, which comprises an anode furnace smelting flue gas pipeline and a ringed flue gas pipeline, is characterized in that a heat exchange box 10 is arranged on the anode furnace smelting flue gas pipeline, the heat exchange box 10 is composed of a pipe cylinder 11 and a sealing plate 12 arranged at both ends of the pipe cylinder 11, a through hole is formed in the sealing plate 12 and penetrates the environmental flue gas pipeline 20 connected with the bag-type dust collector, and the through hole and the outer pipe wall of the environmental flue gas pipeline 20 are in sealing connection, and a flue gas inlet 111 and a flue gas outlet 112 on the pipe cylinder 11 are arranged in a staggered manner on the pipe cylinder 11.

[0014] The pipe cylinder 11 of the heat exchange box 10 is sleeved outside the ambient flue gas pipeline 20 and wraps the ambient flue gas pipeline 20, and an annular chamber is formed between the pipe cylinder 11 and the ambient flue gas pipeline 20. After the anode furnace blowing flue gas enters the heat exchange box 10 from the flue gas inlet 111, the anode furnace blowing flue gas forms a rotational flow around the ambient flue gas pipeline 20 in the annular chamber, and heat is transferred to the low-temperature flue gas in the ambient flue gas pipeline 20, so that heat exchange is realized. Since the anode furnace blowing flue gas flows in a rotating manner from one end to the other end in the annular chamber, the airflow stroke is greatly prolonged, and the rotational flow manner also significantly improves the heat exchange efficiency.

[0015] The pipe cylinder 11 is arranged with the ambient flue gas pipeline 20, and the flue gas inlet 111 and the flue gas outlet 112 are arranged on the opposite sides of the pipe wall at the two ends of the pipe cylinder 11. Simply speaking, as shown in Figure 1 , a circular pipe with a relatively large diameter can be selected, and the two ends are blocked by selecting a suitable plate, so as to form the heat exchange box 10. A through hole matched with the diameter of the ambient flue gas pipeline 20 is dug in the middle of the blocking plate. It should be noted that the connection part should be sealed to avoid air leakage and environmental pollution. The flue gas inlet 111 and the flue gas outlet 112 are arranged in a staggered manner and are far away from each other, so as to increase the airflow stroke.

[0016] Further, the flue gas inlet 111 is connected to the pipe cavity of the pipe cylinder 11 in a tangential direction of the inner wall of the pipe cylinder 11. The flue gas outlet 112 is connected to the pipe cavity of the pipe cylinder 11 in a tangential direction of the inner wall of the pipe cylinder 11. The anode furnace blowing flue gas entering the heat exchange box 10 enters in a tangential direction and naturally performs rotational flow motion under the constraint of the inner wall of the pipe cylinder 11, so as to reduce the influence on the flue gas flow rate and reduce the energy consumption of the flue gas system. The extension directions of the flue gas inlet 111 and the flue gas outlet 112 are parallel.

[0017] In specific implementation, the flue gas inlet 111 and the flue gas outlet 112 can be arranged on opposite sides of the heat exchange box, as shown in Figures 1-4 ; or can be arranged on the same side, as shown in Figure 5 , 6 , and the specific arrangement is flexibly arranged according to the specific layout of the anode furnace blowing flue gas pipeline and the ambient flue gas pipeline.

[0018] The technical scheme of the utility model guides the anode furnace blowing flue gas to the outside of the bag-type flue, wraps the bag-type flue, combines a specially-made inner wall pipeline of high-conductivity material, and uses a high-temperature anode furnace blowing flue gas to heat the ambient flue pipeline A of the bag-type dust removal system, so as to improve the flue gas temperature entering the bag and eliminate the influence of the too-low flue gas temperature of the bag-type flue on the ambient bag-type dust removal.

Claims

1. A copper smelting offgas piping comprising an anode furnace converting offgas piping and a ring offgas piping, characterized in that: The heat exchange box (10) is arranged on the anode furnace blowing flue gas pipeline, and is composed of a pipe cylinder (11) and two end sealing plates (12) arranged on the pipe cylinder (11), a through hole is arranged on the sealing plate (12) and is penetrated by the ambient flue gas pipeline (20) connected with the bag-type dust collector, and a sealed connection is formed between the through hole and the outer pipe wall of the ambient flue gas pipeline (20), and the flue gas inlet (111) and the flue gas outlet (112) on the pipe cylinder (11) are arranged in a staggered mode on the pipe cylinder (11).

2. The copper smelter off-gas conduit according to claim 1, characterized in that: The pipe cylinder (11) is arranged with the ambient flue gas pipeline (20) in a same pipe core mode, and the flue gas inlet (111) and the flue gas outlet (112) are arranged on the pipe walls on the opposite sides of the two ends of the pipe cylinder (11).

3. The copper smelter off-gas conduit according to claim 2, characterized in that: The flue gas inlet (111) is communicated with the pipe cavity of the pipe cylinder (11) in a tangential direction of the inner wall of the pipe cylinder (11).

4. The copper smelter off-gas conduit of claim 2, wherein: The flue gas outlet (112) is communicated with the pipe cavity of the pipe cylinder (11) in a tangential direction of the inner wall of the pipe cylinder (11).

5. A copper smelter off-gas duct according to claim 3 or 4, c h a r a c t e r i s e d in that: The flue gas inlet (111) and the flue gas outlet (112) extend in parallel directions.

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