A heat storage tank system and a flue gas control method of the heat storage tank system

Abstract

The application provides a heat storage tank system and a flue gas control method of the heat storage tank system, which comprises the following steps: calling initial basic parameters of heat storage bodies in the heat storage tank; determining flue gas exhaust capacity of the heat storage tank according to the initial basic parameters of the heat storage bodies; judging whether a stepped structure of the heat storage bodies collapses; if the stepped structure collapses, changing the flue gas exhaust capacity of the heat storage tank so as to balance the load of the heat storage bodies; and if the stepped structure does not collapse, the flue gas exhaust capacity of the heat storage tank remains unchanged. The heat storage tank system and the flue gas control method of the heat storage tank system are provided with an automatic adjusting device, in normal production and use, the load state of the heat storage bodies can be adjusted according to the exhaust temperature of the three-way valve, the heat storage bodies can be ensured to operate under the best working condition, and the heat storage bodies can be prevented from being damaged due to overloading operation.

Description

Technical Field

[0001] This invention relates to the field of thermal storage box technology, and in particular to a thermal storage box system and a method for controlling flue gas in the thermal storage box system. Background Technology

[0002] Regenerative heating furnaces have two states: exhaust and combustion.

[0003] During flue gas exhaust, high-temperature flue gas is drawn out of the furnace and passes through the honeycomb accumulator in the heat storage box, heating the honeycomb accumulator and allowing it to store heat. During combustion, coal gas or air is sent into the furnace through the honeycomb accumulator in the heat storage box, causing the temperature of the coal gas or air to rise, the temperature of the accumulator to drop, and the accumulator to release heat.

[0004] Since the internal cavity of the heat storage box is generally a cuboid system, and the same number of heat storage elements are placed inside, the heat storage elements are prone to damage and collapse during the continuous rapid cooling and heating process. This results in a gap on the top side of the heat storage box. High-temperature flue gas, coal gas, and air will preferentially pass through this gap. As a result, the gap continues to grow, the heat storage and heat release capacity of the heat storage elements deteriorates, and eventually the heat storage box short-circuits. The burner exhaust temperature continues to rise, and the valves and reversing valves in front of the burner are deformed and damaged. The waste heat of the flue gas cannot be effectively recovered, increasing the energy consumption of the heating furnace. Summary of the Invention

[0005] To address the above problems, the present invention provides a thermal storage box system and a method for controlling the flue gas of the thermal storage box system.

[0006] A method for flue gas control in a thermal storage box system, comprising:

[0007] S1. Call the initial basic parameters of the heat storage medium in the heat storage box;

[0008] S2. Determine the flue gas exhaust volume of the heat storage box based on the initial basic parameters of the heat storage body;

[0009] S3. Determine whether the stepped structure of the heat storage body has collapsed;

[0010] S4. If a collapse occurs, change the flue gas exhaust volume of the heat storage box to balance the load of the heat storage body; if no collapse occurs, the flue gas exhaust volume of the heat storage box remains unchanged.

[0011] In a preferred embodiment, the initial basic parameters of the heat storage body include: the size parameters of the heat storage body and the types of heat storage bodies in each layer.

[0012] In a preferred embodiment, determining the exhaust volume of the heat storage box flue gas based on the initial basic parameters of the heat storage body includes:

[0013] Call the flue gas exhaust volume corresponding to the initial basic parameters of the heat storage body in the database.

[0014] In a preferred embodiment, determining whether the stepped structure of the heat storage body has collapsed includes:

[0015] S31 When the exhaust temperature of any group of three-way valves in any combustion control zone exceeds 140°C, there is a risk of collapse. Control the area to reduce the exhaust load.

[0016] When the exhaust temperature of any group of three-way valves in any combustion control zone exceeds 140°C, and the difference between the highest and lowest exhaust temperatures of the heat storage body is more than 20°C, an alarm is triggered, notifying the operator to go to the site to adjust the manual regulating valve in front of the burner and reduce the exhaust power of the group of three-way valves.

[0017] When the exhaust temperature of any group of three-way valves in any combustion control zone exceeds 180°C, the stepped structure has collapsed, triggering an alarm and notifying the operator to go to the site to adjust the manual regulating valve in front of the burner to reduce the exhaust power of the group of three-way valves.

[0018] In a preferred embodiment, if a collapse occurs, changing the flue gas inlet and outlet of the heat storage box to balance the load of the heat storage body includes: if a collapse occurs, the heat storage body filled in the stepped structure can fill the gap of the collapsed heat storage body downwards to prevent the heat storage body from forming a short-circuit channel. At the same time, by reducing the flue gas outlet of the heat storage box, the flue gas enters other channels of the heat storage body, so that the heat storage body will not be overloaded due to the increased air volume in other channels of the heat storage body, which would cause damage to the heat storage body.

[0019] A thermal storage tank system, the thermal storage tank system comprising:

[0020] The main body of the heat storage box includes an inner cavity with a stepped structure on the top side; a heat storage body is also installed inside the inner cavity; a calling module calls the initial basic parameters of the heat storage body from the database; a control module determines the exhaust volume of the heat storage box flue gas according to the calling module, and the control module is used to change the exhaust volume of the heat storage box flue gas according to the judgment result of the judgment module; a judgment module determines whether the stepped structure of the heat storage body has collapsed.

[0021] In a preferred embodiment, the heat storage body includes: a medium-temperature heat storage body, a high-temperature heat storage body, a large-aperture brick, and a baffle brick arranged in sequence, with the baffle brick disposed on the side close to the burner brick.

[0022] In a preferred embodiment, the medium-temperature heat storage body is made of mullite with hexagonal pores, an inscribed circle diameter of 3.5 mm, and a wall thickness of 1 mm; the high-temperature heat storage body is made of corundum mullite with hexagonal pores, an inscribed circle diameter of 3.5 mm, and a wall thickness of 1 mm; the large-aperture brick is made of corundum mullite with hexagonal pores, an inscribed circle diameter of 6 mm, and a wall thickness of 2.5 mm; and the baffle brick is made of fused corundum with circular pores, a diameter of 14 mm, and a wall thickness of 5 mm.

[0023] In a preferred embodiment, the intermediate-temperature heat storage body is 50-150 mm higher than the high-temperature heat storage body.

[0024] The thermal storage box system and flue gas control method of the present invention have the following technical effects:

[0025] 1. The heat storage box system and the flue gas control method of the heat storage box system in this application are equipped with an automatic adjustment device. During normal production and use, the load state of the heat storage body can be adjusted according to the exhaust gas temperature of the three-way valve to ensure that the heat storage body operates under the best working conditions and avoid damage to the heat storage body due to overload operation.

[0026] 2. When the furnace condition changes, the load on the heat storage body of a single heat storage box increases, and timely prompts are made for adjustment.

[0027] 3. When a section of the heat storage body collapses, the heat storage body within the stepped structure on the top side of the inner cavity can promptly move downwards and fill the collapsed gap, sealing off the short-circuit channel for flue gas in the heat storage box. Furthermore, by judging the exhaust gas temperature, an alarm can be triggered in a timely manner to make adjustments and extend the service life of the heat storage body. Attached Figure Description

[0028] Other features and advantages of the invention will become clear from the following description of exemplary embodiments, which is incorporated in and constitutes a part of this specification. The accompanying drawings, which illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0029] Figure 1 The structural diagram of the heat storage tank of this invention.

[0030] In the diagram: 10. Inner cavity; 20. Heat storage body; 11. Stepped structure; 21. Medium-temperature heat storage body; 22. High-temperature heat storage body; 23. Large-aperture brick; 24. Baffle brick; 25. Burner brick. Detailed Implementation

[0031] 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, not all embodiments. 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. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0032] The following description, in conjunction with the accompanying drawings and embodiments, details the thermal storage box system and its flue gas control method.

[0033] A method for flue gas control in a thermal storage box system, comprising:

[0034] S1. Call the initial basic parameters of the heat storage body 20 in the heat storage box;

[0035] S2. Determine the exhaust volume of the heat storage box based on the initial basic parameters of the heat storage body 20.

[0036] S3. Determine whether the stepped structure 11 of the heat storage body 20 has collapsed;

[0037] S4. If a collapse occurs, change the flue gas inlet and outlet flow rates of the heat storage box to balance the load of the heat storage body 20; if no collapse occurs, the flue gas outlet flow rate of the heat storage box remains unchanged.

[0038] The initial basic parameters for calling the heat storage body 20 include: the size parameters of the heat storage body 20 and the types of heat storage bodies 20 in each layer.

[0039] Based on the initial basic parameters of the heat storage body 20, the exhaust volume of the flue gas from the heat storage box is determined as follows:

[0040] Call the flue gas exhaust volume corresponding to the initial basic parameters of heat storage body 20 in the database.

[0041] Determining whether the stepped structure 11 of the heat storage body 20 has collapsed includes:

[0042] S31 When the exhaust temperature of any group of three-way valves in any combustion control zone exceeds 140°C, there is a risk of collapse. Control the area to reduce the exhaust load.

[0043] When the exhaust temperature of any group of three-way valves in any combustion control zone exceeds 140℃, and the difference between the highest and lowest exhaust temperatures of the heat storage body is more than 20℃ (all temperatures in the heat storage box fluctuate between ±10℃), the alarm is triggered, and the operator is notified to go to the site to adjust the manual regulating valve in front of the burner to reduce the exhaust power of the group of three-way valves.

[0044] When the exhaust temperature of any group of three-way valves in any combustion control zone exceeds 180°C, the stepped structure 11 has collapsed. This triggers an alarm, notifying the operator to adjust the manual regulating valve before the burner to reduce the exhaust power of that group of three-way valves.

[0045] In the event of a collapse, the intake and exhaust volumes of the heat storage box are adjusted to balance the load on the heat storage body 20. This includes ensuring that the heat storage body filled within the stepped structure 11 can fill the gap in the collapsed heat storage body, preventing the heat storage body 20 from forming a short-circuit channel. At the same time, by reducing the exhaust volume of the heat storage box, the exhaust gas enters other channels of the heat storage body 20, preventing the heat storage body 20 from overloading due to increased ventilation in other channels, thus avoiding damage to the heat storage body 20.

[0046] The heat storage medium inside the stepped structure 11 on the top side of the inner cavity 10 can automatically move down and fill the collapsed gap. An increase in exhaust gas temperature triggers an alarm, notifying the operator to make timely adjustments (adjusting the manual valve) to extend the service life of the heat storage medium.

[0047] A thermal storage tank system, the thermal storage tank system comprising:

[0048] The main body of the heat storage box includes an inner cavity 10, with a stepped structure 11 on the top side of the inner cavity 10; a heat storage body 20 is also installed inside the inner cavity 10; a calling module calls the initial basic parameters of the heat storage body 20 from the database; a control module determines the flue gas inlet and outlet volume of the heat storage box according to the calling module, and at the same time, the control module is used to change the flue gas inlet and outlet volume of the heat storage box according to the judgment result of the judgment module; a judgment module judges whether the stepped structure 11 of the heat storage body 20 has collapsed.

[0049] The medium-temperature heat storage body 21, the high-temperature heat storage body 22, the large-aperture brick 23, and the baffle brick 24 are arranged in sequence, with the baffle brick 24 located on the side close to the burner brick 25.

[0050] The medium-temperature heat storage body 21 is made of mullite, with regular hexagonal pores, an inscribed circle diameter of 3.5 mm, and a wall thickness of 1 mm.

[0051] The high-temperature heat storage body 22 is made of corundum mullite, with regular hexagonal pores, an inscribed circle diameter of 3.5 mm, and a wall thickness of 1 mm.

[0052] The Big Eye Brick 23 is made of corundum mullite, with a regular hexagonal hole, an inscribed circle diameter of 6mm, and a wall thickness of 2.5mm.

[0053] The medium-temperature heat storage body 21 is 50-150 mm higher than the high-temperature heat storage body 22.

[0054] The baffle brick 24 is made of fused alumina, with circular holes, a diameter of 14mm, and a wall thickness of 5mm.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes that element.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. The present invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for flue gas control in a thermal storage box system, characterized in that, include: S1. Call the initial basic parameters of the heat storage body (20) in the heat storage box; S2. Determine the exhaust volume of the heat storage box based on the initial basic parameters of the heat storage body (20); S3. Determine whether the stepped structure (11) of the heat storage body (20) has collapsed; S4. If a collapse occurs, change the flue gas exhaust volume of the heat storage box to balance the load of the heat storage body (20); If no collapse occurs, the flue gas exhaust volume of the heat storage box remains unchanged; The initial basic parameters of the heat storage body (20) include: Call the size parameters of the heat storage body (20) and the type of each layer of heat storage body (20); The determination of the exhaust volume of the heat storage box flue gas based on the initial basic parameters of the heat storage body (20) includes: Call the flue gas exhaust volume corresponding to the initial basic parameters of the heat storage body (20) in the database; The determination of whether the stepped structure (11) of the heat storage body (20) has collapsed includes: S31 When the exhaust temperature of any group of three-way valves in any combustion control zone exceeds 140°C, there is a risk of collapse. Control the area to reduce the exhaust load. When the exhaust temperature of any group of three-way valves in any combustion control zone exceeds 140°C, and the difference between the highest and lowest exhaust temperatures of the heat storage body is more than 20°C, an alarm is triggered, notifying the operator to adjust the manual regulating valve in front of the burner on-site to reduce the exhaust power of the heat storage box. When the exhaust temperature of any group of three-way valves in any combustion control zone exceeds 180°C, the stepped structure (11) has collapsed, triggering an alarm and notifying the operator to go to the site to adjust the manual regulating valve in front of the burner to reduce the exhaust power of the heat storage box.

2. A thermal storage box system, characterized in that, The heat storage tank system includes: The main body of the heat storage box includes an inner cavity (10), the top side of which is provided with a stepped structure (11); a heat storage body (20) is also provided in the inner cavity (10). Call the module to call the initial basic parameters of the heat storage body (20) in the database; The control module determines the exhaust volume of the heat storage box based on the calling module, and at the same time, the control module is used to change the exhaust volume of the heat storage box flue gas based on the judgment result of the judgment module. The judgment module determines whether the stepped structure (11) of the heat storage body (20) has collapsed; In the event of a collapse, the flue gas exhaust volume of the heat storage tank will be changed to balance the load of the heat storage body (20), including: If a collapse occurs, the heat storage body filled in the stepped structure (11) can fill the gap of the collapsed heat storage body downwards, preventing the heat storage body (20) from forming a short-circuit channel. At the same time, by reducing the exhaust volume of the heat storage box, the flue gas enters other channels of the heat storage body (20), so that the heat storage body (20) will not be overloaded due to the increased ventilation volume of other channels of the heat storage body (20), which would cause damage to the heat storage body (20). If no collapse occurs, the flue gas exhaust volume of the heat storage box remains unchanged; The heat storage body (20) includes: The medium-temperature heat storage body (21), the high-temperature heat storage body (22), the large-aperture brick (23), and the baffle brick (24) are arranged in sequence, with the baffle brick (24) located on the side close to the burner brick (25); The medium-temperature heat storage body (21) is made of mullite, with regular hexagonal pores, an inscribed circle diameter of 3.5 mm, and a wall thickness of 1 mm. The high-temperature heat storage body (22) is made of corundum mullite, with regular hexagonal pores, an inscribed circle diameter of 3.5 mm, and a wall thickness of 1 mm. The large-aperture brick (23) is made of corundum mullite, with a regular hexagonal hole, an inscribed circle diameter of 6 mm, and a wall thickness of 2.5 mm. The baffle brick (24) is made of fused alumina, with circular holes, a diameter of 14 mm, and a wall thickness of 5 mm. The medium-temperature heat storage body (21) is 50-150 mm higher than the high-temperature heat storage body (22).

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