Steam comprehensive utilization system for secondary cooling chamber of continuous casting machine

Abstract

The utility model provides a kind of continuous casting machine two cold chamber steam comprehensive utilization system, it includes: gas treatment pipeline, the gas treatment pipeline successively has steam collection section, pretreatment section, heat exchange section and waste heat and residual moisture elimination section;The inlet section of the gas treatment pipeline is connected with the exhaust steam air port of two cold chamber, to form the steam collection section;The pretreatment section is equipped with dust remover for dust removal;The heat exchange section is equipped with heat exchanger and is connected heat medium pipeline by the heat exchanger;The outlet section of the gas treatment pipeline is connected with continuous casting machine pouring platform manual work area, to form the waste heat and residual moisture elimination section.The utility model can solve the problem that the waste of waste heat resource caused by the direct discharge of the steam-containing gas in the two cold chamber currently, and comprehensively utilize the steam waste heat and residual energy in the two cold chamber.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel smelting technology, and in particular to a comprehensive steam utilization system for the secondary cooling chamber of a continuous casting machine. Background Technology

[0002] Steelmaking workshops generate significant amounts of waste heat. During continuous casting, molten steel is injected into the crystallizer and cooled to form a billet with a liquid core. This billet, after exiting the crystallizer, needs to be continuously cooled by water spray in the secondary cooling zone to accelerate shell solidification. During this cooling process, the secondary cooling water rapidly vaporizes upon contact with the high-temperature billet, generating a large amount of steam. This gas is high-temperature and high-humidity, containing substantial sensible and latent heat. For example, in a round billet continuous casting machine with a conventional configuration, the total heat resource of the steam in the secondary cooling chamber is approximately 40,541 kW, a massive amount.

[0003] The current method for handling steam-containing gases in the secondary cooling chamber is to discharge them outside the workshop through the secondary cooling steam exhaust system, resulting in a significant waste of waste heat resources. Utility Model Content

[0004] The purpose of this invention is to provide a comprehensive steam utilization system for the secondary cooling chamber of a continuous casting machine, which solves the problem of waste heat resources caused by the direct discharge of steam-containing gas in the secondary cooling chamber, and comprehensively utilizes the waste heat and energy of steam in the secondary cooling chamber.

[0005] The above-mentioned technical objectives of this utility model are mainly achieved through the following technical solutions.

[0006] This utility model provides a comprehensive steam utilization system for the secondary cooling chamber of a continuous casting machine, which includes:

[0007] A gas processing pipeline, which sequentially comprises a steam collection section, a pretreatment section, a heat exchange section, and a waste heat and moisture removal section;

[0008] The inlet section of the gas treatment pipeline is connected to the exhaust steam vent of the secondary cooling chamber to form the steam collection section; the pretreatment section is equipped with a dust collector for dust removal; the heat exchange section is equipped with a heat exchanger and is connected to the heat medium pipeline through the heat exchanger; the outlet section of the gas treatment pipeline is connected to the manual operation area of ​​the continuous casting machine casting platform to form the waste heat and moisture elimination section.

[0009] In a preferred embodiment of this utility model, the heat medium pipeline sequentially comprises an inlet section, a heat medium heat exchange section, and a heat exchange utilization section;

[0010] The inlet section is connected to a heat medium source; the heat exchanger is located in the heat medium heat exchange section; the outlet section of the heat medium pipeline is connected to a waste heat utilization device to form the heat exchange utilization section.

[0011] In a preferred embodiment of the present invention, the heat exchange section has a primary heat exchange section and a secondary heat exchange section arranged in sequence, and the heat medium heat exchange section has a primary heat medium heat exchange section and a secondary heat medium heat exchange section arranged in sequence.

[0012] A first heat exchanger is provided between the primary heat exchange section and the primary heat medium heat exchange section, and a second heat exchanger is provided between the secondary heat exchange section and the secondary heat medium heat exchange section.

[0013] In a preferred embodiment of this utility model, the waste heat utilization equipment is a heating terminal and / or a lithium bromide absorption chiller unit.

[0014] In a preferred embodiment of this utility model, the chilled water produced by the lithium bromide absorption chiller is transported through pipelines to the electrical room under the continuous casting machine platform.

[0015] In a preferred embodiment of this utility model, the steam collection section is equipped with two cooling fans.

[0016] In a preferred embodiment of this utility model, the dust collector is a stainless steel mesh filter with multiple filter elements connected in parallel.

[0017] In a preferred embodiment of this utility model, both the first heat exchanger and the second heat exchanger are heat pipe heat exchangers.

[0018] In a preferred embodiment of the present invention, the steam collection section has multiple inlet branch pipes arranged in parallel, and each inlet branch pipe is connected to the exhaust steam vent of the secondary cooling chamber.

[0019] In a preferred embodiment of this utility model, the waste heat and moisture elimination section has multiple outlet branches arranged in parallel, and the exhaust port of each outlet branch is set towards the manual operation area of ​​the continuous casting machine casting platform.

[0020] Compared with the prior art, the technical solution of this utility model has the following features and advantages:

[0021] The continuous casting machine secondary cooling chamber steam comprehensive utilization system described in this utility model can fully utilize the waste heat resources in the secondary cooling chamber steam. The heat medium after heat exchange can be used for heating and / or cooling, and the filtered, dried, and low-temperature gas after heat exchange can be used for ventilation of the casting platform, thus realizing the comprehensive utilization of waste heat resources. At the same time, the chilled water generated by the lithium bromide absorption chiller unit and the heat medium after heat exchange can be directly used for workshop cooling and heating respectively, without the need for storage, realizing on-site utilization of resources, self-sufficiency, and maximizing energy saving and consumption reduction. Attached Figure Description

[0022] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0023] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0024] Figure 1 This is a schematic diagram of the steam comprehensive utilization system of the secondary cooling chamber of the continuous casting machine described in this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100. Gas processing pipeline; 101. Steam collection section; 102. Pretreatment section; 103. Primary heat exchange section; 104. Secondary heat exchange section; 105. Waste heat and moisture removal section; 106. Inlet branch pipe; 107. Secondary cooling fan; 108. Dust collector; 109. First heat exchanger; 110. Second heat exchanger; 111. Outlet branch pipe; 112. Manual operation area of ​​continuous casting machine pouring platform;

[0027] 200. Heat medium pipeline; 201. Heating terminal; 202. Lithium bromide absorption chiller unit. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0029] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] This utility model provides a comprehensive steam utilization system for the secondary cooling chamber of a continuous casting machine, which includes a gas treatment pipeline 100. The gas treatment pipeline 100 has a steam collection section 101, a pretreatment section 102, a heat exchange section, and a waste heat and moisture elimination section 105 in sequence. The inlet section of the gas treatment pipeline 100 is connected to the exhaust steam vent of the secondary cooling chamber to form the steam collection section 101. The pretreatment section 102 is equipped with a dust collector 108 for dust removal. The heat exchange section is equipped with a heat exchanger and is connected to a heat medium pipeline 200 through the heat exchanger. The outlet section of the gas treatment pipeline 100 is connected to the manual operation area 112 of the continuous casting machine casting platform to form the waste heat and moisture elimination section 105.

[0032] The continuous casting machine secondary cooling chamber steam comprehensive utilization system described in this utility model can make full use of the waste heat resources in the secondary cooling chamber steam. The heat medium after heat exchange can be used for heating and / or cooling, and the filtered, heat-exchanged, dry, low-temperature gas can be used for ventilation of the casting platform, thus realizing the comprehensive utilization of waste heat resources.

[0033] The following section will provide a detailed description of the specific structure of each part of the continuous casting machine secondary cooling chamber steam comprehensive utilization system described in this utility model, as well as the pipeline connection relationship between each part.

[0034] like Figure 1 As shown, the continuous casting machine secondary cooling chamber steam comprehensive utilization system has a gas treatment pipeline 100, which is used to collect the gas containing steam in the secondary cooling chamber and to process and utilize the waste heat of the gas during the forward transport process.

[0035] The inlet of the gas processing pipeline 100 is connected to the steam exhaust port of the secondary cooling chamber, that is, the part of the pipeline corresponding to the inlet section of the gas processing pipeline 100 forms the steam collection section 101.

[0036] Furthermore, such as Figure 1 As shown, a secondary cooling fan 107 is provided on the steam collection section 101. The secondary cooling fan 107 is used to extract the steam-containing gas in the secondary cooling chamber into the gas processing pipeline 100 and provide power for the continuous forward transport of the gas.

[0037] Along the direction from entrance to exit, such as Figure 1 As shown, a dust collector 108 and a heat exchanger are sequentially installed on the gas processing pipeline 100.

[0038] A section of pipeline equipped with a dust collector 108 forms a pretreatment section 102. The dust collector 108 in the pretreatment section 102 is used to remove dust from the gas, preventing dust in the gas from affecting the heat transfer efficiency in the subsequent heat exchange process. Preferably, the dust collector 108 is a stainless steel mesh filter with multiple filter elements connected in parallel.

[0039] A section of pipeline equipped with a heat exchanger forms a heat exchange section. The heat exchanger in this section is used to recover waste heat from the gas (through heat exchange via the heat medium within the heat medium pipeline 200 described below). The gas temperature is reduced, and the steam liquefies to form condensate. Preferably, a heat pipe heat exchanger is used.

[0040] The outlet of the gas treatment pipeline 100 is connected to the manual operation area 112 of the continuous casting machine casting platform. The cooled gas is transported to the casting platform through the pipeline. An air outlet is set in the worker's work area of ​​the casting platform to eliminate a large amount of cold and wet loads on the casting platform. That is, the part of the pipeline corresponding to the outlet section of the gas treatment pipeline 100 forms the waste heat and moisture elimination section 105.

[0041] like Figure 1 As shown, the continuous casting machine secondary cooling chamber steam comprehensive utilization system also has a heat medium pipeline 200. The heat medium pipeline 200 is connected to the heat exchanger on the gas processing pipeline 100 through a heat exchanger. The heat medium in the heat medium pipeline 200 exchanges heat with the gas in the gas processing pipeline 100 to realize the recovery of steam waste heat.

[0042] like Figure 1 As shown, the heat medium pipeline 200 has an inlet section, a heat medium heat exchange section, and a heat exchange utilization section in sequence. The inlet section is connected to a heat medium source to provide a low-temperature heat medium into the heat medium pipeline 200. The heat medium can be water. The heat exchanger is located in the heat medium heat exchange section, that is, the heat medium heat exchange section of the heat medium pipeline 200 is set opposite to the heat exchange section on the gas processing pipeline 100. The heat exchanger transfers the heat of the steam to the heat medium. The outlet section of the heat medium pipeline 200 is connected to a waste heat utilization device to form a heat exchange utilization section.

[0043] Furthermore, such as Figure 1 As shown, the waste heat utilization equipment is heating terminal 201 and / or lithium bromide absorption chiller unit 202.

[0044] The heat medium that has been heated after heat exchange can be used for heating. The high-temperature heat medium after heat exchange can be directly introduced into the heating terminal 201 for heating, or it can be exchanged with hot water in the heating network to produce heating water at a higher temperature.

[0045] The heat medium that has been heated after heat exchange can also be used for cooling. The lithium bromide absorption chiller unit 202 uses the high-temperature heat medium after heat exchange for cooling. The produced chilled water can be directly used to meet the cooling needs of the electrical room under the continuous casting machine platform, solving the problem that conventional air conditioners do not work or have reduced cooling capacity due to excessively high ambient temperature.

[0046] The following will further describe the structure of the preferred embodiment of the continuous casting machine secondary cooling chamber steam comprehensive utilization system of this utility model.

[0047] According to one embodiment of the present invention, such as Figure 1 As shown, the heat exchange section on the gas processing pipeline 100 has a primary heat exchange section 103 and a secondary heat exchange section 104 arranged in sequence, and the heat medium heat exchange section on the heat medium pipeline 200 has a primary heat medium heat exchange section and a secondary heat medium heat exchange section arranged in sequence; a first heat exchanger 109 is provided between the primary heat exchange section 103 and the primary heat medium heat exchange section, and a second heat exchanger 110 is provided between the secondary heat exchange section 104 and the secondary heat medium heat exchange section.

[0048] The waste heat of the steam is recovered by a two-stage heat exchanger. After passing through the first heat exchanger 109, most of the heat in the gas is initially recovered, and the gas temperature is reduced to 60℃-70℃. After passing through the second heat exchanger 110, the heat is further recovered, and the gas temperature is reduced to 30℃-35℃, thus fully recovering the waste heat in the gas.

[0049] Preferably, both the first heat exchanger 109 and the second heat exchanger 110 are heat pipe heat exchangers.

[0050] According to one embodiment of the present invention, such as Figure 1 As shown, the steam collection section 101 has multiple inlet branch pipes 106 arranged in parallel, and each inlet branch pipe 106 is connected to the exhaust steam vent of the secondary cooling chamber.

[0051] According to one embodiment of the present invention, such as Figure 1 As shown, the waste heat and moisture elimination section 105 has multiple outlet branches 111 arranged in parallel, and the exhaust ports of each outlet branch 111 are all set towards the manual operation area 112 of the continuous casting machine casting platform.

[0052] In one specific embodiment, the steam temperature in the secondary cooling chamber of the continuous casting machine is 100°C, with a moisture content of approximately 60%. The steam is discharged from the secondary cooling chamber via a secondary cooling fan 107, which has a designed airflow of 100,000 m³ / h and a total pressure of 2800 Pa. The sensible and latent heat of the extracted gas is approximately 40,541 kW. The outlet of the secondary cooling fan 107 is connected to a pretreatment section 102, which uses a multi-filter parallel stainless steel mesh filter to remove dust from the gas, preventing dust accumulation on the heat pipe bundles from affecting heat transfer efficiency. The treated gas is then passed into a primary heat exchange section 103 to initially recover most of the heat in the gas, reducing the gas temperature to 60°C-70°C. It is then further passed into a secondary heat exchange section 104 to further recover heat, reducing the gas temperature to 30°C-35°C. Inside the heat pipe heat exchanger, the 30℃ heat medium (water) exchanges heat with the high-temperature gas, and the outlet water temperature can reach 85℃-90℃. The recovered heat accounts for about 85%-90% of the total waste heat.

[0053] After heat exchange, the heat medium enters the lithium bromide absorption chiller unit 202 through pipelines. Utilizing the heat from the high-temperature hot water, chilled water is produced through an evaporator. This chilled water can be connected to fan coil units or combined air conditioning units for cooling rooms such as the electrical room and control room of the continuous casting machine. Simultaneously, the heat medium is connected to the heating network, and the 85℃-90℃ hot water can meet the heat load of most rooms. Meanwhile, the outlet gas of the heat pipe heat exchanger is piped to the casting platform of the continuous casting machine, and dry, low-temperature air is discharged through air outlets. This effectively removes a large amount of cold and wet loads from the casting platform, creating a suitable working environment for personnel.

[0054] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A continuous casting machine secondary cooling chamber steam comprehensive utilization system, characterized in that, include: The gas processing pipeline (100) has, in sequence, a steam collection section (101), a pretreatment section (102), a heat exchange section, and a waste heat and moisture removal section (105). The inlet section of the gas treatment pipeline (100) is connected to the exhaust steam vent of the secondary cooling chamber to form the steam collection section (101); the pretreatment section (102) is equipped with a dust collector (108) for dust removal; the heat exchange section is equipped with a heat exchanger and is connected to the heat medium pipeline (200) through the heat exchanger; the outlet section of the gas treatment pipeline (100) is connected to the manual operation area (112) of the continuous casting machine casting platform to form the waste heat and moisture elimination section (105).

2. The continuous caster secondary cooling chamber steam comprehensive utilization system according to claim 1, characterized by, The heat medium pipeline (200) has an inlet section, a heat medium heat exchange section and a heat exchange utilization section in sequence; The inlet section is connected to a heat medium source; the heat exchanger is located in the heat medium heat exchange section; the outlet section of the heat medium pipeline (200) is connected to a waste heat utilization device to form the heat exchange utilization section.

3. The continuous caster secondary cooling chamber steam comprehensive utilization system according to claim 2, characterized by, The heat exchange section has a primary heat exchange section (103) and a secondary heat exchange section (104) arranged in sequence, and the heat medium heat exchange section has a primary heat medium heat exchange section and a secondary heat medium heat exchange section arranged in sequence; A first heat exchanger (109) is provided between the primary heat exchange section (103) and the primary heat medium heat exchange section, and a second heat exchanger (110) is provided between the secondary heat exchange section (104) and the secondary heat medium heat exchange section.

4. The continuous caster secondary cooling chamber steam comprehensive utilization system according to claim 2, characterized by, The waste heat utilization equipment is a heating terminal (201) and / or a lithium bromide absorption chiller (202).

5. The continuous casting machine secondary cooling chamber steam comprehensive utilization system according to claim 4, characterized in that, The chilled water produced by the lithium bromide absorption chiller (202) is transported through pipelines to the electrical room under the continuous casting machine platform.

6. The continuous caster secondary cooling chamber steam comprehensive utilization system according to claim 1, characterized by, The steam collection section (101) is equipped with two cooling fans (107).

7. The continuous caster secondary cooling chamber steam comprehensive utilization system according to claim 1, characterized by, The dust collector (108) is a stainless steel mesh filter with multiple filter elements connected in parallel.

8. The continuous caster secondary cooling chamber steam comprehensive utilization system according to claim 3, characterized in that, Both the first heat exchanger (109) and the second heat exchanger (110) are heat pipe heat exchangers.

9. The continuous caster secondary cooling chamber steam comprehensive utilization system according to claim 1, characterized in that, The steam collection section (101) has multiple inlet branch pipes (106) arranged in parallel, and each of the inlet branch pipes (106) is connected to the exhaust steam vent of the secondary cooling chamber.

10. The continuous caster secondary cooling chamber steam comprehensive utilization system according to claim 1, characterized in that, The waste heat and moisture elimination section (105) has multiple outlet branches (111) arranged in parallel, and the exhaust ports of each outlet branch (111) are all set towards the manual operation area (112) of the continuous casting machine casting platform.

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