Novel system for producing superheated steam at convection section of industrial heating furnace

Abstract

The utility model discloses a novel system for producing superheated steam at a convection section of an industrial heating furnace, which comprises a steam pocket deoxygenated water replenishing device, a material waste heat steam production device, a first safety relief device, a second safety relief device, a heating furnace, a superheated steam cooling device, a steam using device and a steam pipe network double-control device, the deoxygenated water supplementing device, the first safety relief device, the second safety relief device and the heating furnace are all connected with the material waste heat steam generating device, steam generated by the material waste heat steam generating device is conveyed to the heating furnace, the heating furnace is connected with the temperature control device, and the steam generated by the heating furnace is cooled to the specified temperature through the superheated steam cooling device. The gas utilization device is connected with the superheated steam cooling device and the steam pipe network double-control device, the whole superheated steam cooling device firstly passes through the gas utilization device, redundant gas is exhausted into the steam pipe network double-control device to be recycled, and the steam pipe network double-control device is connected with the heating furnace. The steam pipe network double-control device provides steam when the material waste heat steam generating device stops supplying steam, and has the advantages that a stable steam source can be realized, and the steam has a temperature adjusting function and a pressure reducing function.

Description

A novel system for producing superheated steam in the convection section of an industrial heating furnace. Technical Field

[0001] This utility model relates to the chemical industry, and in particular to a novel system for producing superheated steam in the convection section of an industrial heating furnace. Background Technology

[0002] In the petrochemical production field, stable and efficient heating methods play a crucial role in the production process. Superheated steam, as an important heat source, is widely used in the heating stages of various reaction components in chemical production, as well as as stripping gas in fractionation systems. Its temperature typically needs to be maintained between 250 and 350 degrees Celsius to meet the specific temperature requirements of different chemical reactions and separation operations.

[0003] Petrochemical companies commonly use industrial furnaces for heating, where the main industrial medium requiring heating completes heat transfer within the radiant chamber, while the convection chamber accounts for approximately 20%-30% of the heat load and is often used to heat superheated steam or indirectly supplement self-produced steam. Currently, the systems for producing superheated steam in enterprise heating furnaces are relatively simple, mostly relying on external pipelines to provide saturated steam at around 130 degrees Celsius, which is then further heated to the target temperature in the furnace. However, this traditional method has many drawbacks:

[0004] First, the external gas supply is unstable. The external steam supply is affected by various factors; if a malfunction occurs and the supply stops, the entire production line will be forced to shut down. This not only disrupts normal chemical production but may also lead to material stockpiling, equipment damage, and other problems, causing significant economic losses to the company.

[0005] Secondly, the heating furnace lacks sufficient temperature control capability. Different chemical reactions have varying requirements for superheated steam temperature, and the operating conditions during production are constantly changing. However, existing heating furnaces cannot flexibly adjust the superheated steam temperature according to actual needs.

[0006] Third, the lack of pressure-reducing devices poses a safety hazard. Chemical production environments are complex, and system pressure is prone to fluctuations. During the production of superheated steam in the heating furnace, excessively high pressure without effective pressure-reducing devices could lead to serious accidents such as pipeline rupture and steam leaks. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to provide a new type of industrial heating furnace system for producing superheated steam in the convection section, which provides a stable steam source and has temperature regulation and pressure reduction functions.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a novel system for producing superheated steam in the convection section of an industrial heating furnace, characterized in that it includes a deoxygenated water supply device for a steam drum, a material waste heat steam generation device, a first safety relief device, a second safety relief device, a heating furnace, a superheated steam cooling device, a steam consumption device, and a dual-control device for the steam pipeline network. The deoxygenated water supply device, the safety relief device, and the heating furnace are all connected to the material waste heat steam generation device. The deoxygenated water supply device is used to provide deoxygenated water to the material waste heat steam generation device, and the safety relief device is used to discharge the material waste heat steam. The overpressure steam generated by the heat-generating steam device is discharged to the outside. The steam generated by the waste heat steam generation device is transported to the heating furnace. The heating furnace is connected to a temperature control device. The steam generated by the heating furnace is cooled to a specified temperature by a superheated steam cooling device. The gas-using device is connected to the superheated steam cooling device and the steam pipeline dual control device. The entire superheated steam cooling device first passes through the gas-using device. Excess gas is discharged into the steam pipeline dual control device for recovery. The steam pipeline dual control device is connected to the heating furnace. The steam pipeline dual control device provides steam when the waste heat steam generation device stops supplying steam.

[0009] A further preferred embodiment of this utility model is: the steam drum deoxygenated water replenishment device includes a deoxygenated water pipe, a thermometer, a flow meter, and a regulating valve.

[0010] A further preferred embodiment of this utility model is as follows: the waste heat steam generation device for materials includes a material inlet pipe, a material outlet pipe and a steam generator. The high-temperature material enters the steam generator through the material inlet pipe, and the high-temperature material is cooled in the steam generator and discharged through the material outlet pipe.

[0011] A further preferred embodiment of this utility model is as follows: the waste heat steam generation device for materials further includes a first thermometer, a second thermometer, a liquid level monitor, a pressure gauge, and a steam drum water detection and replacement device. The first thermometer is installed on the material inlet pipe, the second thermometer is installed on the material outlet pipe, and the liquid level monitor, pressure gauge, and steam drum water detection and replacement device are connected to the steam generator.

[0012] A further preferred embodiment of this utility model is as follows: the waste heat steam generation device is connected to the first safety relief device, the first safety relief device includes a first safety valve, a second safety valve and a silencer, the first safety valve and the second safety valve discharge the overpressure steam generated by the waste heat steam generation device.

[0013] A further preferred embodiment of this utility model is as follows: the heating furnace includes a steam inlet end and a steam outlet end, the steam outlet end is connected to a second safety relief device, the second safety relief device includes a third safety valve and a fourth safety valve.

[0014] A further preferred embodiment of this utility model is: the heating furnace is connected to a superheated steam cooling device, which includes deoxygenated water, a superheated steam temperature regulating valve, and a thermometer. The deoxygenated water enters the steam outlet of the heating furnace through the control of the superheated steam temperature regulating valve to cool the steam.

[0015] A further preferred embodiment of this utility model is as follows: a first warm-pipe bypass assembly is provided between the superheated steam cooling device and the gas-using device, and a second warm-pipe bypass assembly is provided between the heating furnace and the material waste heat steam generation device. Both the first warm-pipe bypass assembly and the second warm-pipe bypass assembly include a one-way valve and a valve, and the one-way valve and the valve are connected in parallel.

[0016] A further preferred embodiment of this utility model is: the steam pipeline dual control device includes a control valve and an external steam source, and the steam pipeline dual control device is installed between the heating furnace and the superheated steam cooling device.

[0017] This invention utilizes waste heat from chemical reactions to generate steam, achieving efficient energy utilization and reducing heat loss. A dual-steam supply mode, with the waste heat generation device and a dual-control steam pipeline network working together, ensures a continuous and stable steam supply, preventing equipment downtime. First and second safety relief devices promptly discharge overpressure steam, enhancing system safety. A superheated steam cooling device precisely controls the steam temperature to meet the needs of subsequent steam-consuming units, ensuring stable production. Overall, this system demonstrates superior performance in energy utilization, system stability, safety, and temperature control, effectively improving the comprehensive performance of superheated steam production in industrial heating furnaces. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of this utility model;

[0019] Figure 2 is a structural schematic diagram of the existing design. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] As shown in Figure 1, a new type of industrial heating furnace convection section system for producing superheated steam includes a steam drum deoxygenation water replenishment device 1, a material waste heat steam generation device 2, a first safety relief device 3, a second safety relief device 4, a heating furnace 5, a superheated steam cooling device 6, a gas consumption device 7, and a steam pipeline dual control device 8.

[0022] The function of the deoxygenated water makeup device 1 is to replenish the water used to remove oxygen. The function of the waste heat steam generation device 2 is to generate steam using the waste heat of high-temperature materials produced during the chemical reaction process. The first safety relief device 3 and the second safety relief device 4 are used to discharge overpressured steam. The heating furnace 5 is used to reheat the steam and increase its temperature. The superheated steam cooling device 6 is used to cool the superheated steam. The gas supply device 7 and the dual control device for the steam pipeline network 8 are used to provide backup steam through the external steam pipeline network, preventing the deoxygenated water makeup device 1 and the waste heat steam generation device 2 from stopping their gas supply due to malfunctions or other reasons, thus ensuring the normal operation of the equipment. The steam drum deoxygenated water supply device 1, the safety relief devices (first safety relief device 3 and second safety relief device 4), and the heating furnace 5 are all connected to the material waste heat steam generation device 2. The steam drum deoxygenated water supply device 1 is used to provide deoxygenated water to the material waste heat steam generation device 2. The safety relief devices (first safety relief device 3 and second safety relief device 4) are used to discharge the overpressure steam generated by the material waste heat steam generation device 2 to the outside. The steam generated by the material waste heat steam generation device 2 is transported to the heating furnace 5. The heating furnace 5 is connected to a temperature control device. The steam generated by the heating furnace 5 is cooled to a specified temperature by the superheated steam cooling device 6. The gas consumption device 7 is connected to the superheated steam cooling device 6 and the steam pipeline dual control device 8. The entire superheated steam cooling device 6 first passes through the gas consumption device 7, and the excess gas is discharged into the steam pipeline dual control device 8 for recovery. The steam pipeline dual control device 8 is connected to the heating furnace 5. The steam pipeline dual control device 8 provides steam when the material waste heat steam generation device 2 stops supplying steam. The waste heat steam generation device 2 utilizes the waste heat from chemical reactions to generate steam, effectively utilizing the surplus heat of the equipment, reducing heat loss, decreasing dependence on external energy sources, and improving energy efficiency. A dual-steam supply mode ensures continuous steam supply, preventing equipment shutdowns due to a single steam source failure and maintaining stable system operation. The first safety relief device 3 and the second safety relief device 4 promptly discharge overpressure steam to prevent system overpressure, reduce safety risks, and ensure the safe and reliable operation of the entire production system. The superheated steam cooling device 6 precisely cools the steam generated by the heating furnace 5 to a specified temperature, meeting the stringent steam temperature requirements of subsequent gas-consuming units 7 and ensuring stable production of these units.

[0023] The deoxygenated water replenishment device 1 for the steam drum includes a deoxygenated water pipe 11, a thermometer 12, a flow meter 13, and a regulating valve 14. The thermometer 12, flow meter 13, and regulating valve 14 enable real-time monitoring of the temperature and flow rate of the deoxygenated water. The regulating valve 14 precisely controls the replenishment amount of deoxygenated water, ensuring a stable and adequate supply of deoxygenated water to the waste heat steam generation device 2, thus guaranteeing stable steam generation.

[0024] The waste heat steam generation device 2 includes a material inlet pipe 21, a material outlet pipe 22, and a steam generator 23. High-temperature materials enter the steam generator 23 through the material inlet pipe 21, are cooled in the steam generator 23, and are discharged through the material outlet pipe 22. This clarifies the core structure of the waste heat steam generation device 2. The high-temperature materials are efficiently cooled through heat exchange within the steam generator 23, transferring waste heat to deoxygenated water to generate steam, thus fully utilizing the waste heat from the chemical reaction and improving steam generation efficiency.

[0025] The waste heat steam generation device 2 also includes a first thermometer 24, a second thermometer 25, a level gauge 26, a pressure gauge 27, and a steam drum water detection and replacement device 28. The first thermometer 24 is installed on the material inlet pipe 21, and the second thermometer 25 is installed on the material outlet pipe 22. The level gauge 26, pressure gauge 27, and steam drum water detection and replacement device 28 are connected to the steam generator 23. The first thermometer 24 and the second thermometer 25 monitor the material inlet and outlet temperatures in real time, which can intuitively reflect the waste heat utilization status of the material. The level gauge 26 and pressure gauge 27 monitor the liquid level and pressure inside the steam generator 23 to ensure that the steam generator 23 operates under safe and stable conditions. The steam drum water detection and replacement device 28 can detect the water quality in a timely manner and replace it to ensure steam quality.

[0026] The waste heat steam generation device 2 is connected to the first safety relief device 3. The first safety relief device 3 includes a first safety valve 31, a second safety valve 32, and a silencer 33. The first safety valve 31 and the second safety valve 32 discharge the overpressure steam generated by the waste heat steam generation device 2. When the steam pressure rises abnormally, the overpressure steam can be discharged more reliably. In conjunction with the silencer 33, the emission noise is reduced, further ensuring the safe operation of the device.

[0027] The heating furnace 5 includes a steam inlet 51 and a steam outlet 52. The steam outlet 52 is connected to a second safety relief device 4, which includes a third safety valve 41 and a fourth safety valve 42. The third safety valve 41 and the fourth safety valve 42 connected to the steam outlet 52 of the heating furnace 5 monitor the steam pressure again after the steam has been reheated by the heating furnace 5. When the steam pressure exceeds the safe range of the heating furnace 5, it is released in a timely manner, providing additional safety assurance for the entire steam production process.

[0028] The heating furnace 5 is connected to a superheated steam cooling device 6. The superheated steam cooling device 6 includes deoxygenated water 61, a superheated steam temperature regulating valve 62, and a thermometer 63. The deoxygenated water 61 enters the steam outlet 52 of the heating furnace 5 under the control of the superheated steam temperature regulating valve 62 to cool the steam. By using the deoxygenated water 61 and the superheated steam temperature regulating valve 62 to cool the steam at the steam outlet 52 of the heating furnace 5, the amount of deoxygenated water 61 entering can be flexibly adjusted according to actual needs, precisely controlling the steam cooling range to ensure the superheated steam temperature stably reaches the specified value, meeting the steam temperature requirements of different gas-using devices 7.

[0029] A first warm-up bypass assembly 9 is installed between the superheated steam cooling device 6 and the gas-using device 7, and a second warm-up bypass assembly 10 is installed between the heating furnace 5 and the material waste heat steam generation device 2. Both the first warm-up bypass assembly 9 and the second warm-up bypass assembly 10 include one-way valves (91, 101) and valves (92, 102), which are connected in parallel. The first warm-up bypass assembly 9 and the second warm-up bypass assembly 10 facilitate warm-up and water flushing operations at the initial stage of device startup, preventing damage to the steam pipeline due to excessive temperature differences. The parallel design of the one-way valves (91, 101) and valves (92, 102) allows valves (92, 102) to be opened at the initial stage of equipment startup, enabling high-temperature steam to quickly fill the entire pipeline and avoiding the one-way valves (91, 101) from hindering the rapid filling of steam.

[0030] The dual-control device 8 for the steam network includes a control valve 81 and an external steam source 82. The dual-control device 8 is located between the heating furnace 5 and the superheated steam cooling device 6. When the waste heat steam generation device 2 malfunctions or the steam supply is insufficient, the dual-control device 8 can quickly switch to the external steam source 82 for steam supply; when there is a surplus of steam, it can also recover excess steam back into the steam network, achieving efficient allocation and utilization of steam resources.

[0031] The above provides a detailed description of a novel industrial heating furnace system for producing superheated steam in the convection section, as provided by this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A novel system for producing superheated steam in the convection section of an industrial heating furnace, characterized in that, The system includes a steam drum deoxygenated water supply device, a material waste heat steam generation device, a first safety relief device, a second safety relief device, a heater, a superheated steam cooling device, a gas consumption device, and a dual-control device for the steam pipeline network. The deoxygenated water supply device, the first safety relief device, the second safety relief device, and the heater are all connected to the material waste heat steam generation device. The deoxygenated water supply device provides deoxygenated water to the material waste heat steam generation device. The safety relief device discharges the overpressure steam generated by the material waste heat steam generation device to the outside. The steam generated by the material waste heat steam generation device is transported to the heater. The heater is connected to a temperature control device. The steam generated by the heater is cooled to a specified temperature by the superheated steam cooling device. The gas consumption device connects the superheated steam cooling device and the dual-control device for the steam pipeline network. The entire superheated steam cooling device first passes through the gas consumption device, and excess gas is discharged into the dual-control device for recovery. The dual-control device for the steam pipeline network is connected to the heater and provides steam when the material waste heat steam generation device stops supplying steam.

2. The system for producing superheated steam in the convection section of a novel industrial heating furnace according to claim 1, characterized in that... The aforementioned deoxygenated water makeup device for the steam drum includes a deoxygenated water pipe, a thermometer, a flow meter, and a regulating valve.

3. The system for producing superheated steam in the convection section of a novel industrial heating furnace according to claim 1, characterized in that... The waste heat steam generation device includes a material inlet pipe, a material outlet pipe, and a steam generator. High-temperature material enters the steam generator through the material inlet pipe, cools down in the steam generator, and is discharged through the material outlet pipe.

4. A system for producing superheated steam in the convection section of a novel industrial heating furnace according to claim 3, characterized in that... The waste heat steam generation device also includes a first thermometer, a second thermometer, a level monitor, a pressure gauge, and a steam drum water detection and replacement device. The first thermometer is installed on the material inlet pipe, the second thermometer is installed on the material outlet pipe, and the level monitor, pressure gauge, and steam drum water detection and replacement device are connected to the steam generator.

5. A system for producing superheated steam in the convection section of a novel industrial heating furnace according to claim 1, characterized in that... The waste heat steam generation device is connected to the first safety relief device, which includes a first safety valve, a second safety valve, and a silencer. The first and second safety valves discharge the overpressure steam generated by the waste heat steam generation device.

6. A system for producing superheated steam in the convection section of a novel industrial heating furnace according to claim 1, characterized in that... The heating furnace includes a steam inlet and a steam outlet. The steam outlet is connected to a second safety relief device, which includes a third safety valve and a fourth safety valve.

7. A system for producing superheated steam in the convection section of a novel industrial heating furnace according to claim 1, characterized in that... The heating furnace is connected to a superheated steam cooling device, which includes deoxygenated water, a superheated steam temperature regulating valve, and a thermometer. The deoxygenated water enters the steam outlet of the heating furnace through the control of the superheated steam temperature regulating valve to cool the steam.

8. A system for producing superheated steam in the convection section of a novel industrial heating furnace according to claim 1, characterized in that... A first warm-pipe bypass assembly is provided between the superheated steam cooling device and the gas-using device, and a second warm-pipe bypass assembly is provided between the heating furnace and the material waste heat steam generation device. Both the first warm-pipe bypass assembly and the second warm-pipe bypass assembly include a one-way valve and a valve, and the one-way valve and the valve are connected in parallel.

9. A system for producing superheated steam in the convection section of a novel industrial heating furnace according to claim 1, characterized in that... The aforementioned dual-control steam pipeline system includes a control valve and an external steam source, and is installed between the heating furnace and the superheated steam cooling device.

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