Hot-dip galvanized steel wire production line water heat recycling system

Abstract

The utility model provides a kind of hot galvanizing steel wire production line water heat recovery and reuse system, it is related to production line water recovery and reuse technical field;Including sequentially connected and respectively equipped with auxiliary tank's caustic wash tank, first water wash tank, pickling tank, plating aid tank, caustic wash tank, first water wash tank, pickling tank, plating aid tank are connected with its corresponding auxiliary tank by circulating pump and circulation pipeline respectively;The inner wall of the auxiliary tank of caustic wash tank, pickling tank, plating aid tank is all provided with coil pipe, steam source is connected with the inlet of coil pipe respectively by steam pipeline, the outlet of each coil pipe is communicated with the inlet of collecting pipe respectively, and the outlet of collecting pipe is communicated with the water inlet of first water wash tank;The technical scheme of the utility model solves the problem that the vast majority of latent heat carried by high-temperature steam in the prior art is not effectively released, causing water resource waste, and simultaneously using waste heat to heat the water in the first water wash tank can better clean the surface of steel wire.

Description

Technical Field

[0001] This utility model relates to the field of water recycling and reuse technology in production lines, and in particular to a water heat recycling and reuse system for hot-dip galvanized steel wire production lines. Background Technology

[0002] Hot-dip galvanizing is a method for preparing a zinc alloy coating with excellent adhesion on the surface of steel wire. This coating has significant advantages in terms of bonding strength, density, durability, maintenance-free operation, and economy, and has become the industry standard process. Typical steps include: wire unloading → water washing → electrolytic alkaline washing → first water washing → pickling → second water washing → fluxing → drying → hot-dip galvanizing → water cooling → wire take-up. Among these, the alkaline washing, pickling, and fluxing processes require heating the liquids.

[0003] In the process of electrolytic alkaline washing → first water wash → acid washing → second water wash → fluxing, the alkaline washing tank, first water wash tank, acid washing tank, second water wash tank, and fluxing tank are all equipped with auxiliary tanks. A circulating pump circulates the washing solution between the main tank and the auxiliary tanks. Simultaneously, because the process requires heating of the alkaline solution, acid solution, and fluxing solution, coils are installed in the corresponding auxiliary tanks to introduce hot steam into each coil, thus heating the washing solution in the auxiliary tank to meet the process requirements. However, the steam still retains a significant amount of heat after heat exchange in the auxiliary tanks. This heat is not utilized effectively; instead, the steam after heat exchange is directly condensed in the condenser and then enters the wastewater tank, resulting in a serious waste of resources. Furthermore, the first water wash after alkaline washing in existing technologies typically uses cold washing, which generally yields mediocre cleaning results.

[0004] Therefore, there is an urgent need for a system that can efficiently recycle and reuse water and heat resources from the above-mentioned processes in order to achieve the energy-saving, consumption-reducing and emission-reduction goals of hot-dip galvanized steel wire production lines. Utility Model Content

[0005] To address the aforementioned technical problem that most of the latent heat of vaporization carried by high-temperature steam cannot be effectively released, a hydrothermal recovery and reuse system for hot-dip galvanized steel wire production lines is provided.

[0006] The technical means adopted in this utility model are as follows: The hot-dip galvanized steel wire production line hydrothermal recovery and reuse system includes an alkaline washing tank, a first water washing tank, an acid washing tank, and a fluxing tank, which are connected in sequence and equipped with auxiliary tanks respectively. The alkaline washing tank, the first water washing tank, the acid washing tank, and the fluxing tank are connected to their respective auxiliary tanks through circulation pumps and circulation pipelines. The inner walls of the auxiliary tanks of the alkaline washing tank, the acid washing tank, and the fluxing tank are all equipped with coils. The steam source is connected to the inlet of the coils through steam pipelines. The outlet of each coil is connected to the inlet of a manifold, and the outlet of the manifold is connected to the water inlet of the first water washing tank.

[0007] Preferably, the inner wall of the first washing tank is also provided with a coil that is connected at one end to a steam pipe and at the other end to the inlet of a manifold.

[0008] Preferably, each auxiliary tank is equipped with two circulation pumps, with one circulation pump in standby mode.

[0009] Compared with the prior art, the present invention has the following advantages: 1. This utility model returns the steam that should have been wasted back to the production line and introduces it into the auxiliary tank of the first water washing tank. The pure steam will turn into hot water with a large amount of heat, mix with the water in the auxiliary tank, and heat the water in the auxiliary tank. This makes reasonable use of the heat and water resources that should have been wasted, and reduces the energy consumption of the production line and the amount of wastewater to be purified.

[0010] 2. Using water with a certain amount of heat to wash the steel wire that has been alkali-washed can improve washing efficiency and the degree of cleaning.

[0011] 3. To further improve the cleaning effect, steam can also be introduced into the first water washing tank for heating. At the same time, the waste steam introduced by the collection pipe can not only play a role in heating, but also play a role in replenishing water.

[0012] 4. There are at least two circulation pumps, one as a backup, to ensure that the liquid is constantly circulating and will not stop working due to the failure of one pump.

[0013] Based on the above reasons, this utility model can be widely promoted in fields such as water recycling and reuse in hot-dip galvanizing production lines for steel wire. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural layout diagram of a hydrothermal recovery and reuse system for a hot-dip galvanized steel wire production line according to this utility model.

[0016] In the diagram: 1. Auxiliary tank; 2. Alkali washing tank; 3. First water washing tank; 4. Pickling tank; 5. Plating flux tank; 6. Manifold; 7. Circulating pump; 8. Steam source; 9. Steam pipeline. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, this utility model provides a hydrothermal recovery and reuse system for a hot-dip galvanized steel wire production line, including an alkaline washing tank 2, a first water washing tank 3, an acid washing tank 4, and an auxiliary plating tank 5, which are connected in sequence and equipped with auxiliary tanks 1 respectively. The alkaline washing tank 2, the first water washing tank 3, the acid washing tank 4, and the auxiliary plating tank 5 are respectively connected to their corresponding auxiliary tanks 1 through circulation pumps 7 and circulation pipelines; each auxiliary tank 1 is equipped with two circulation pumps 7, and one of the two circulation pumps 7 is in standby mode.

[0019] The inner walls of the auxiliary tanks 1 of the alkaline washing tank 2, acid washing tank 4, and fluxing tank 5 are all equipped with coils. The inner wall of the first water washing tank 3 is also equipped with a coil with one end connected to the steam pipe 9 and the other end connected to the inlet of the manifold 6.

[0020] Steam source 8 is connected to the inlet of the coil through steam pipe 9, and the outlet of each coil is connected to the inlet of the manifold 6. The outlet of the manifold 6 is connected to the water inlet of the first water washing tank 3.

[0021] In use, steel wires are placed into the production line and cleaned one by one until they enter the electrolytic alkaline washing, first water washing, acid washing, and fluxing process sections. The washing solutions in alkaline washing tank 2, first water washing tank 3, acid washing tank 4, and fluxing tank 5 are pumped into the corresponding auxiliary tank 1 through circulation pump 7 and circulation pipelines, realizing the circulation of the washing solution between the main tank and auxiliary tank 1. Because the process requires heating of the alkaline washing solution, the side walls and bottom walls of auxiliary tank 1 are equipped with coils. Hot steam generated by steam source 8 enters the coils through steam pipeline 9. The steam input into the coils will push out the steam that first enters the coils to maintain the heat in the coils. The hot steam in the coils is used to heat the washing solution in auxiliary tank 1. The hot washing solution circulates multiple times between the main tank and auxiliary tank 1 to heat the washing solution in the main tank. The steel wires are immersed in the hot washing solution. Meanwhile, the hot steam that is pushed out flows through the coil into the collection pipe 6 and finally into the auxiliary tank 1 corresponding to the first water washing tank 3, instead of being directly discharged into the waste liquid tank, thus achieving the goals of energy saving, consumption reduction and emission reduction.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hydrothermal recovery and reuse system for a hot-dip galvanized steel wire production line, comprising an alkaline washing tank, a first water washing tank, an acid washing tank, and a fluxing tank, which are connected in sequence and each equipped with an auxiliary tank. The alkaline washing tank, the first water washing tank, the acid washing tank, and the fluxing tank are respectively connected to their corresponding auxiliary tanks via circulating pumps and circulating pipelines. The inner walls of the auxiliary tanks of the alkaline washing tank, the acid washing tank, and the fluxing tank are all equipped with coils. The system is characterized in that... The steam source is connected to the inlet of each coil via a steam pipe, the outlet of each coil is connected to the inlet of a collection pipe, and the outlet of the collection pipe is connected to the water inlet of the first washing tank.

2. The hydrothermal recovery and reuse system for hot-dip galvanized steel wire production line according to claim 1, characterized in that, The inner wall of the first water washing tank is also provided with a coil that is connected at one end to the steam pipe and at the other end to the inlet of the collection pipe.

3. The hydrothermal recovery and reuse system for hot-dip galvanized steel wire production line according to claim 1, characterized in that, Each of the auxiliary tanks is equipped with two circulation pumps, with one circulation pump in standby mode.

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