Rapid heating sulfuric acid conversion system

Abstract

The utility model provides a rapid heating sulfuric acid conversion system, and relates to the technical field of sulfuric acid production. The rapid heating sulfuric acid conversion system comprises a drying tower, a first spray tower, a fan unit, a first heat exchange unit, a first electric furnace, a heat pipe boiler, a converter, a second electric furnace, a second heat exchange unit and an auxiliary pipe group, the output end of the drying tower is connected with the fan unit; the first heat exchange unit is connected with the fan unit and the first electric furnace, the first electric furnace is connected with the converter, the converter is connected with the heat pipe boiler, the heat pipe boiler is connected with the first spray tower, the first spray tower is connected with the second heat exchange unit, the second heat exchange unit is connected with the second electric furnace, and the second electric furnace is connected with the converter. The auxiliary pipe set comprises a first branch pipe, a second branch pipe, a first valve and a second valve. The rapid heating sulfuric acid conversion system solves the technical problems that an existing sulfuric acid conversion system is low in heating efficiency and long in heating time after shutdown maintenance and before starting again.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfuric acid production, in particular to a sulfuric acid conversion system with rapid temperature rise. Background Art

[0002] Sulfuric acid production mainly refers to the process of roasting pyrite to produce sulfur dioxide-containing flue gas, and through a series of chemical reactions and processing processes, sulfuric acid meeting industrial standards is produced.

[0003] After the existing sulfuric acid system is overhauled and stopped, before the sulfuric acid system is started, the sulfuric acid conversion system needs to be heated with air to increase the temperature of each section of the converter to ensure that the sulfur dioxide flue gas reacts at a high temperature after startup and meets the process requirements. When the existing sulfuric acid conversion system is heated, air enters the drying tower → main fan → electric furnace at the inlet of the first layer of the converter → the first, second, and third layers of the conversion tower → heat pipe boiler → the first spray tower → electric furnace at the inlet of the fourth layer of the converter → the fourth layer of the conversion tower. During this air heating process, after the air is heated by the electric heating furnace, it also needs to pass through the first spray tower, where the air is sprayed with sulfuric acid and the temperature drops, and then enters the electric furnace at the inlet of the fourth layer of the converter to be heated and raised again, resulting in a low heating efficiency and a long heating time of the sulfuric acid conversion system.

[0004] The inventor of the present invention at least found the following problems during the implementation of this embodiment:

[0005] For the existing sulfuric acid conversion system, the heating efficiency is low and the heating time is long before the sulfuric acid conversion system is started again after a shutdown for maintenance. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a sulfuric acid conversion system with rapid temperature rise, which solves the technical problems that for the existing sulfuric acid conversion system, the heating efficiency is low and the heating time is long before the sulfuric acid conversion system is started again after a shutdown for maintenance.

[0007] Solution of the Utility Model:

[0008] The utility model provides a sulfuric acid conversion system with rapid heating, which includes a drying tower, a first spray tower, a fan group, a first heat exchange unit, a first electric furnace, a heat pipe boiler, a converter, a second electric furnace, a second heat exchange unit and an auxiliary pipe group; the output end of the drying tower is connected with the fan group; the first heat exchange unit is connected with the fan group, and is connected with the first electric furnace, the first electric furnace is connected with the converter, the converter is connected with the heat pipe boiler, the heat pipe boiler is connected with the first spray tower, the first spray tower is connected with the second heat exchange unit, the second heat exchange unit is connected with the second electric furnace, and the second electric furnace is connected with the converter; the auxiliary pipe group includes a first branch pipe, a second branch pipe, a first valve and a second valve; the first branch pipe is used to be arranged on the pipeline connecting the heat pipe boiler and the first spray tower; the first valve is connected with the first branch pipe; one end of the first branch pipe is connected with the first branch pipe, and the other end is connected with the second heat exchange unit; the second valve is connected with the second branch pipe.

[0009] Further, the converter is internally provided with a first layer, a second layer, a third layer and a fourth layer from top to bottom; the first electric furnace is connected with the input end of the first layer, and the second electric furnace is connected with the input end of the fourth layer.

[0010] Further, a nicotinic acid absorption tower is connected to one end of the first branch pipe.

[0011] Further, the second heat exchange unit is connected with a second spray tower.

[0012] Beneficial effects:

[0013] The utility model provides a sulfuric acid conversion system with rapid heating. When the sulfuric acid conversion system with rapid heating needs to be heated, the first valve is closed and the second valve is opened. Air enters the fan group from the drying tower, then enters the first heat exchange unit, then enters the first electric furnace, then enters the converter, then enters the heat pipe boiler, then enters the first branch pipe, then enters the second branch pipe, then enters the second heat exchange unit, then enters the second electric furnace, and then enters the converter; after the rapid heating system is started up, the second valve is closed, and the air coming out of the pipeline boiler enters the first spray tower. This kind of sulfuric acid conversion system with rapid heating has a relatively high heating efficiency and a short heating time after overhaul or maintenance. Description of the drawings

[0014] In order to more clearly illustrate the specific implementation manners of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific implementation manners or the prior art. Obviously, the drawings in the following description are some implementation manners of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of the rapid heating sulfuric acid conversion system provided in this embodiment;

[0016] Figure 2 It is a schematic structural diagram of the rapid heating sulfuric acid conversion system at location A provided in this embodiment.

[0017] Icon:

[0018] 100 - drying tower;

[0019] 200 - first spray tower;

[0020] 300 - fan group;

[0021] 400 - first heat exchange unit;

[0022] 500 - first electric furnace;

[0023] 600 - heat pipe boiler;

[0024] 700 - converter; 710 - first layer; 720 - second layer; 730 - third layer; 740 - fourth layer;

[0025] 800 - second electric furnace;

[0026] 900 - second heat exchange unit; 910 - auxiliary pipe group; 911 - first branch pipe; 912 - second branch pipe; 913 - first valve; 914 - second valve; 920 - nicotinic acid absorption tower; 930 - second spray tower. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0029] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0031] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The following will describe in detail some embodiments of the present utility model with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] This embodiment provides a sulfuric acid conversion system with rapid temperature rise. Please refer to Figure 1-2As shown in the figure, it includes a drying tower 100, a first spray tower 200, a fan group 300, a first heat exchange unit 400, a first electric furnace 500, a heat pipe boiler 600, a converter 700, a second electric furnace 800, a second heat exchange unit 900 and a secondary pipe group 910; the output end of the drying tower 100 is connected to the fan group 300; the first heat exchange unit 400 is connected to the fan group 300, and it is connected to the first electric furnace 500, the first electric furnace 500 is connected to the converter 700, the converter 700 is connected to the heat pipe boiler 600, the heat pipe boiler 600 is connected to the first spray tower 200, the first spray tower 200 is connected to the second heat exchange unit 900, the second heat exchange unit 900 is connected to the second electric furnace 800, and the second electric furnace 800 is connected to the converter 700; the secondary pipe group 910 includes a first branch pipe 911, a second branch pipe 912, a first valve 913 and a second valve 914; the first branch pipe 911 is used to be arranged on the pipeline connecting the heat pipe boiler 600 and the first spray tower 200; the first valve 913 is connected to the first branch pipe 911; one end of the first branch pipe 911 is connected to the first branch pipe 911, and the other end thereof is connected to the second heat exchange unit 900; the second valve 914 is connected to the second branch pipe 912.

[0034] Specifically, the drying tower 100 is used to remove moisture in the air. The first spray tower 200 sprays a spray medium (such as water, alkali solution or acid solution) into the flue gas containing pollutants, so that the pollutants undergo physical or chemical reactions with the spray medium, thereby achieving the purpose of purifying the waste gas; the first heat exchange unit 400 and the second heat exchange unit 900 are used to recover the waste heat of the air to achieve energy conservation; the first electric furnace 500 is used to provide heat source and preheat and raise the temperature, and the heat pipe boiler 600 is used to ensure the temperature of the air; the converter 700 is used to oxidize sulfur dioxide (SO 2 ) into sulfur trioxide (SO 3 ); the secondary pipe group 910 is used to reduce the heat loss when the rapid sulfuric acid conversion system restarts. The first branch pipe 911 is used to arrange the second branch pipe 912 on the pipeline connecting the heat pipe boiler 600 and the first spray tower 200. The second branch pipe 912 cooperates with the first valve 913 and the second valve 914 to control the flow direction of the air. When the rapid heating sulfuric acid conversion system needs to be heated up, the first valve 913 is closed and the second valve 914 is opened. The air enters the fan group 300 from the drying tower 100, then enters the first heat exchange unit 400, then enters the first electric furnace 500, then enters the converter 700, then enters the heat pipe boiler 600, then enters the first branch pipe 911, then enters the second branch pipe 912, then enters the second heat exchange unit 900, then enters the second electric furnace 800, and then enters the converter 700; after the rapid heating system starts up, the second valve 914 is closed, and the air coming out of the pipeline boiler enters the first spray tower 200.

[0035] In this embodiment, a first layer 710, a second layer 720, a third layer 730, and a fourth layer 740 are sequentially arranged inside the converter 700 from top to bottom; the first electric furnace 500 is connected to the input end of the first layer 710, and the second electric furnace 800 is connected to the input end of the fourth layer 740.

[0036] Specifically, a first layer 710, a second layer 720, a third layer 730, and a fourth layer 740 are sequentially arranged inside the converter 700 from top to bottom to improve the conversion efficiency and control the reaction temperature; the first electric furnace 500 conveys high-temperature air to the first layer 710, and the second electric furnace 800 conveys high-temperature air to the fourth layer 740.

[0037] In this embodiment, one end of the first branch pipe 911 is connected to a nicotinic acid absorption tower 920.

[0038] Specifically, the nicotinic acid absorption tower 920 is used to treat the waste gas in the first branch pipe 911 and the second branch pipe 912.

[0039] In this embodiment, the second heat exchange unit 900 is connected to a second spray tower 930.

[0040] Specifically, the second spray tower 930 can divide the waste gas treatment process into two stages. Each stage can be optimized for different pollutants or pollution concentrations, thereby improving the overall purification efficiency.

[0041] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rapid temperature rise sulfuric acid conversion system, characterized in that: It comprises a drying tower (100), a first spray tower (200), a fan unit (300), a first heat exchange unit (400), a first electric furnace (500), a heat pipe boiler (600), a converter (700), a second electric furnace (800), a second heat exchange unit (900) and a secondary pipe unit (910); The output end of the drying tower (100) is connected to the fan unit (300); The first heat exchange unit (400) is connected to the fan unit (300), and is also connected to the first electric furnace (500), the first electric furnace (500) is connected to the converter (700), the converter (700) is connected to the heat pipe boiler (600), the heat pipe boiler (600) is connected to the first spray tower (200), the first spray tower (200) is connected to the second heat exchange unit (900), the second heat exchange unit (900) is connected to the second electric furnace (800), and the second electric furnace (800) is connected to the converter (700); The auxiliary pipe group (910) includes a first branch pipe (911), a second branch pipe (912), a first valve (913) and a second valve (914); The first branch pipe (911) is used to be arranged on a pipeline connecting the heat pipe boiler (600) and the first spray tower (200); The first valve (913) is connected to the first branch pipe (911); One end of the first branch pipe (911) is connected to the first branch pipe (911), and the other end thereof is connected to the second heat exchange unit (900); The second valve (914) is connected to the second branch pipe (912).

2. A rapid temperature rise sulfuric acid conversion system according to claim 1, characterized in that: The converter (700) is provided with a first layer (710), a second layer (720), a third layer (730) and a fourth layer (740) in sequence from top to bottom; The first electric furnace (500) is connected to the input end of the first layer (710), and the second electric furnace (800) is connected to the input end of the fourth layer (740).

3. A rapid temperature rise sulfuric acid conversion system according to claim 2, characterized in that: One end of the first branch pipe (911) is connected to a nicotinic acid absorption tower (920).

4. A rapid temperature rise sulfuric acid conversion system according to claim 3, characterized in that: The second heat exchange unit (900) is connected to a second spray tower (930).

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