System for increasing temperature of dry quenching calcium-based dry desulfurization agent

Abstract

The utility model provides a system for increasing the temperature of a dry quenching calcium-based dry desulfurization agent, which belongs to the technical field of dry quenching desulfurization and comprises a dust removal system, a desulfurization system, an electric tracing band, a heat exchanger and a compressed air pipeline, the dust removal system comprises a dust removal cover, a low-temperature dust removal pipeline, a high-temperature dust removal pipeline, a heat storage cooler, a bag type dust collector, a dust removal fan and an exhaust funnel, the dust removal cover is arranged at the discharge port of the dry quenching body, and the dust removal cover, the low-temperature dust removal pipeline, the heat storage cooler, the bag type dust collector, dust removal air and the exhaust funnel are sequentially connected; the two ends of the high-temperature dust removal pipeline are respectively connected with the dry quenching body and the heat storage cooler; according to the system, when the calcium-based dry desulfurization system is under the working condition in winter, the purposes of enhancing the desulfurization effect, reducing the content of a desulfurizing agent and reducing the operation and maintenance cost are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of dry quenching desulfurization technology, specifically relating to a system for increasing the temperature of calcium-based dry desulfurizing agent in dry quenching. Background Technology

[0002] The patent application with application number 202120144486.1 proposes a dry quenching flue gas desulfurization device. This system is a completely dry system that does not require water, does not generate wastewater, has low energy consumption, is highly flexible, and can adjust the amount of desulfurizing agent injected according to actual conditions to meet the emission indicators required by environmental protection requirements. It is also highly adaptable to factory operating conditions and has good and suitable adjustment characteristics when adjusting production load.

[0003] Currently, to ensure that the sulfur concentration in the emitted flue gas meets national standards, dry quenching dust removal systems often employ calcium-based dry desulfurization systems to treat dust-laden gases. When operating in winter, the significant drop in outdoor temperature increases the temperature difference between the high-temperature flue gas and the outside air, leading to increased heat loss. This results in the high-temperature flue gas temperature being far below the design temperature. Consequently, the amount of desulfurizing agent required to achieve the designed desulfurization effect is much higher than the design value, thus increasing operating costs. Utility Model Content

[0004] Based on the above-mentioned technical problems, this utility model provides a system for increasing the temperature of calcium-based dry desulfurizing agent in dry quenching coke. This system enables the calcium-based dry desulfurization system to enhance the desulfurization effect while reducing the content of desulfurizing agent and reducing the cost of operation and maintenance during winter operation.

[0005] The specific technical solution is as follows:

[0006] A system for raising the temperature of calcium-based dry desulfurizing agent in dry quenching coke includes: a dust removal system, a desulfurization system, an electric heating tape, a heat exchanger, and a compressed air pipeline; the dust removal system includes a dust removal hood, a low-temperature dust removal pipeline, a high-temperature dust removal pipeline, a regenerative cooler, a bag filter, a dust removal fan, and an exhaust stack. The dust removal hood is installed at the discharge port of the dry quenching coke body. The dust removal hood, the low-temperature dust removal pipeline, the regenerative cooler, the bag filter, the dust removal fan, and the exhaust stack are connected in sequence, and the two ends of the high-temperature dust removal pipeline are connected to the dry quenching coke body and the regenerative cooler, respectively; the desulfurization system includes a desulfurization chamber, a Roots blower, and a desulfurizing agent pipeline. A rotary feeder is provided at the bottom of the desulfurization chamber, and the outlet of the rotary feeder and the Roots blower are connected to the desulfurizing agent pipeline, respectively; the electric heating tape is wrapped around the outer wall of the desulfurizing agent pipeline; the heat exchanger is installed between the outlets of the high-temperature dust removal pipeline and the desulfurizing agent pipeline; the compressed air pipeline is connected to the desulfurizing agent pipeline.

[0007] In addition, the system for increasing the temperature of calcium-based dry desulfurizing agent in the above-mentioned technical solution provided by this utility model may also have the following additional technical features:

[0008] In the above technical solution, the heat exchanger is equipped with heat exchange tubes. The inlet end of the heat exchange tubes is connected to a low-pressure steam pipeline, and the outlet end of the heat exchange tubes is connected to a hot water heating pipeline.

[0009] The above technical solution also includes: a silo pump, a pneumatic conveying pipeline, an ash silo, and a humidifier; the silo pump is installed at the outlet of the bag filter; the input end of the pneumatic conveying pipeline is connected to the silo pump; the ash silo is connected to the output end of the pneumatic conveying pipeline; the input end of the humidifier is connected to the outlet of the ash silo, and the output end of the humidifier is connected to a dump truck.

[0010] In the above technical solution, a belt conveyor is installed at the discharge port of the dry quenching coke body, and a dust removal hood is installed above the belt conveyor.

[0011] The above technical solution also includes: a first compressed air storage tank and a second compressed air storage tank; the first compressed air storage tank is connected to a bag filter; and the second compressed air storage tank is connected to a pneumatic conveying pipeline.

[0012] The system for increasing the temperature of calcium-based dry desulfurizing agents in dry quenching coke production according to this invention has the following advantages compared with the prior art:

[0013] 1. By installing a heat exchanger between the high-temperature dust removal pipeline and the desulfurizing agent pipeline outlet, the waste heat in the low-pressure steam is used to heat the desulfurizing agent through the heat exchanger. This increases the temperature of the desulfurizing agent, which helps to enhance its activity and thus enhance the desulfurization effect. At the same time, the electric heating tape ensures that the temperature of the desulfurizing agent can be maintained even when the ambient temperature is low, ensuring its fluidity and preventing blockage.

[0014] 2. As temperature rises, the molecular kinetic energy of the desulfurizing agent increases, relatively weakening the intermolecular forces. This reduces the viscosity of the substance, preventing the desulfurizing agent from condensing or accumulating in the pipeline, thus avoiding blockages. This also reduces the amount used, as well as cleaning and maintenance costs.

[0015] 3. By adding a compressed air pipeline to the desulfurizing agent pipeline, compressed air is used to provide additional power to move the desulfurizing agent, ensuring smooth movement of the desulfurizing agent, avoiding blockage of the pipeline by the desulfurizing agent, and at the same time, allowing the desulfurizing agent to fully contact the pipeline to improve heat exchange efficiency. Attached Figure Description

[0016] Figure 1 This is a flowchart of a system for increasing the temperature of a calcium-based dry desulfurizing agent in dry quenching coke, according to this utility model.

[0017] Figure 2 for Figure 1 A magnified view of part A;

[0018] in, Figures 1 to 2 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0019] 10 Dust hood, 11 Low-temperature dust removal pipeline, 12 High-temperature dust removal pipeline, 13 Thermal storage cooler, 14 Bag filter, 15 Dust removal fan, 16 Exhaust stack, 17 Desulfurization silo, 18 Roots blower, 19 Desulfurizing agent pipeline, 20 Heat exchanger, 21 Compressed air pipeline, 22 Heat exchange tube, 23 Low-pressure steam pipeline, 24 Hot water heating pipeline, 25 Silo pump, 26 Pneumatic conveying pipeline, 27 Ash silo, 28 Humidifier, 29 Dump truck, 30 Dry quenching body, 31 Belt conveyor, 32 First compressed air storage tank, 33 Second compressed air storage tank. Detailed Implementation

[0020] The following are specific implementation cases and appendices. Figure 1-2 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0021] A system for increasing the temperature of calcium-based dry desulfurizing agents in dry quenching coke processes, such as Figure 1-2 As shown, the system includes: a dust removal system, a desulfurization system, an electric heating tape, a heat exchanger 20, and a compressed air pipeline 21. The dust removal system includes a dust hood 10, a low-temperature dust removal pipeline 11, a high-temperature dust removal pipeline 12, a thermal regenerator 13, a bag filter 14, a dust removal fan 15, and an exhaust stack 16. The dust hood 10 is located at the discharge port of the dry quenching coke body 30. The dust hood 10, the low-temperature dust removal pipeline 11, the thermal regenerator 13, the bag filter 14, the dust removal fan, and the exhaust stack 16 are connected in sequence, and the high-temperature dust removal system... The two ends of the pipeline 12 are connected to the dry quenching body 30 and the heat storage cooler 13, respectively; the desulfurization system includes a desulfurization chamber 17, a Roots blower 18 and a desulfurizing agent pipeline 19. A rotary feeder is provided at the bottom of the desulfurization chamber 17, and the outlet of the rotary feeder and the Roots blower 18 are connected to the desulfurizing agent pipeline 19, respectively; an electric heating tape is wrapped around the outer wall of the desulfurizing agent pipeline 19; a heat exchanger 20 is set between the outlet of the high-temperature dust removal pipeline 12 and the desulfurizing agent pipeline 19; and a compressed air pipeline 21 is connected to the desulfurizing agent pipeline 19.

[0022] By adopting the above technical solution, a heat exchanger 20 is installed between the outlet of the high-temperature dust removal pipeline 12 and the desulfurizing agent pipeline 19. The waste heat from the low-pressure steam is used to heat the desulfurizing agent through the heat exchanger, increasing the agent's temperature and enhancing its activity, thereby improving the desulfurization effect. Simultaneously, the electric heating tape ensures that the desulfurizing agent's temperature is maintained even at low ambient temperatures, guaranteeing its fluidity and preventing blockage. As the temperature rises, the molecular kinetic energy of the desulfurizing agent increases, relatively weakening the intermolecular forces and reducing the viscosity of the substance. This prevents the desulfurizing agent from condensing or accumulating in the pipeline, leading to blockage. This also reduces the amount used and lowers cleaning and maintenance costs. By adding a compressed air pipeline 21 to the desulfurizing agent pipeline 19, compressed air provides additional power to propel the desulfurizing agent, ensuring smooth movement and preventing pipeline blockage. Simultaneously, it ensures sufficient contact between the desulfurizing agent and the pipeline, improving heat exchange efficiency.

[0023] Specifically, the dust removal fan 15 provides power to the system, allowing the flue gas from the dry quenching body 30 to enter the regenerator 13 through the low-temperature dust removal pipe 11 and the high-temperature dust removal pipe 12 respectively. After heat exchange in the regenerator 13, the flue gas enters the bag filter 14 for dust removal, and the flue gas after dust removal is discharged through the exhaust pipe 16. Since the effective working temperature range of the desulfurizing agent is between 150°C and 300°C, a heat exchanger 20 is added between the desulfurizing agent pipe 19 and the high-temperature dust removal pipe 12 to increase the temperature of the desulfurizing agent, thereby improving the desulfurization effect of the desulfurizing agent on the high-temperature flue gas. The desulfurized high-temperature flue gas then enters the regenerator 13 for heat exchange.

[0024] In embodiments of this utility model, such as Figure 1-2 As shown, the heat exchanger 20 is equipped with a heat exchange tube 22. The inlet end of the heat exchange tube 22 is connected to the low-pressure steam pipe 23, and the outlet end of the heat exchange tube 22 is connected to the hot water heating pipe 24.

[0025] Specifically, the heat exchanger 20 has four cold and heat source connection holes. The cold source is a desulfurizing agent, and the heat source is low-pressure steam. The cold source inlet is located at the top of the heat exchanger 20, the outlet of the desulfurizing agent pipe 19 is connected to the cold source inlet, the cold source outlet is located on the lower surface of the heat exchanger 20, and the cold source outlet is connected to the high-temperature dust removal pipe 12. The heat source inlet is located at the air inlet end of the heat exchange tube 22, and the heat source inlet is connected to the low-pressure steam pipe 23. The heat source outlet is located at the air outlet end of the heat exchange tube 22, and the heat source outlet is connected to the hot water heating pipe 24.

[0026] In embodiments of this utility model, such as Figure 1-2As shown, it also includes: a silo pump 25, a pneumatic conveying pipeline 26, an ash silo 27, and a humidifier 28; the silo pump 25 is located at the discharge port of the bag filter 14; the input end of the pneumatic conveying pipeline 26 is connected to the silo pump 25; the ash silo 27 is connected to the output end of the pneumatic conveying pipeline 26; the input end of the humidifier 28 is connected to the discharge port of the ash silo 27, and the output end of the humidifier 28 is connected to the dump truck 29.

[0027] The dust discharged from the bag filter 14 enters the ash silo 27 through the silo pump 25 and the pneumatic conveying pipe 26, and is humidified by the humidifier 28. The humidified dust falls onto the dump truck 29 for transportation.

[0028] In an embodiment of this utility model, a belt conveyor 31 is provided at the discharge port of the dry quenching body 30, and a dust removal hood 10 is provided above the belt conveyor 31.

[0029] By combining the belt conveyor 31 and the dust collector 10, the flue gas and materials discharged from the discharge port of the dry quenching coke body 30 fall onto the belt conveyor 31, and the dust collector 10 draws away the flue gas discharged from the discharge port for dust removal.

[0030] In embodiments of this utility model, such as Figure 1-2 As shown, it also includes: a first compressed air storage tank 32 and a second compressed air storage tank 33; the first compressed air storage tank 32 is connected to the bag filter 14; the second compressed air storage tank 33 is connected to the pneumatic conveying pipeline 26.

[0031] The first compressed air tank 32 is used to clean the filter bags in the bag filter 14, and the second compressed air tank 33 is used to provide power for the dust in the pneumatic conveying pipeline 26.

[0032] Implementation Process: By installing a heat exchanger 20 between the outlet of the high-temperature dust removal pipe 12 and the desulfurizing agent pipe 19, the waste heat in the low-pressure steam is used to heat the desulfurizing agent through the heat exchanger. This increases the temperature of the desulfurizing agent, helps to enhance its activity, and thus enhances the desulfurization effect. Simultaneously, the electric heating tape ensures that the temperature of the desulfurizing agent is maintained even at low ambient temperatures, ensuring its fluidity and preventing blockage. As the temperature rises, the molecular kinetic energy of the desulfurizing agent increases, relatively weakening the intermolecular forces, thereby reducing the viscosity of the substance and preventing the desulfurizing agent from condensing or accumulating in the pipe, leading to blockage. This also reduces the amount used and lowers cleaning and maintenance costs. By adding a compressed air pipe 21 to the desulfurizing agent pipe 19, compressed air provides additional power to propel the desulfurizing agent, ensuring smooth movement and preventing pipe blockage. It also ensures sufficient contact between the desulfurizing agent and the pipe, improving heat exchange efficiency.

[0033] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0034] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A system for increasing the temperature of a calcium-based dry desulfurizing agent in dry quenching coke, characterized in that, include: The dust removal system includes a dust removal hood, a low-temperature dust removal pipe, a high-temperature dust removal pipe, a heat storage cooler, a bag filter, a dust removal fan, and an exhaust stack. The dust removal hood is installed at the discharge port of the dry quenching body. The dust removal hood, the low-temperature dust removal pipe, the heat storage cooler, the bag filter, the dust removal fan, and the exhaust stack are connected in sequence, and the two ends of the high-temperature dust removal pipe are respectively connected to the dry quenching body and the heat storage cooler. A desulfurization system, comprising a desulfurization chamber, a Roots blower, and a desulfurizing agent pipeline, wherein a rotary feeder is provided at the bottom of the desulfurization chamber, and the outlet of the rotary feeder and the Roots blower are respectively connected to the desulfurizing agent pipeline; An electric heating tape is wrapped around the outer wall of the desulfurizing agent pipeline; A heat exchanger is disposed between the outlet of the high-temperature dust removal pipe and the outlet of the desulfurizing agent pipe; A compressed air pipeline, which is connected to the desulfurizing agent pipeline.

2. The system for raising the temperature of calcium-based dry desulfurizing agent in dry quenching coke according to claim 1, characterized in that, The heat exchanger is equipped with heat exchange tubes. The inlet end of the heat exchange tubes is connected to a low-pressure steam pipe, and the outlet end of the heat exchange tubes is connected to a hot water heating pipe.

3. The system for increasing the temperature of calcium-based dry desulfurizing agent in dry quenching coke according to claim 2, characterized in that, Also includes: A silo pump is installed at the discharge port of the bag filter; A pneumatic conveying pipeline, the input end of which is connected to the silo pump; A gray silo, which is connected to the output end of the pneumatic conveying pipeline; The humidifier has its input end connected to the discharge port of the ash silo, and its output end connected to a dump truck.

4. The system for increasing the temperature of a calcium-based dry desulfurizing agent in dry quenching coke according to claim 3, characterized in that, A belt conveyor is provided at the discharge port of the dry quenching coke body, and the dust removal hood is located above the belt conveyor.

5. The system for increasing the temperature of a calcium-based dry desulfurizing agent in dry quenching coke according to claim 4, characterized in that, Also includes; A first compressed air storage tank is connected to the bag filter. The second compressed air storage tank is connected to the pneumatic conveying pipeline.

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