A ceramic spray coupled fluidized bed drying system

Abstract

The utility model provides a kind of ceramic spray coupling fluidized bed drying system, including gas internal combustion engine generator set, heat exchanger, hot blast stove, further including spray fluidized bed, the exhaust port of gas internal combustion engine generator set is connected with the air inlet of spray fluidized bed through first pipeline, the cylinder liner cooling cavity of gas internal combustion engine generator set is connected with the hot medium passage of heat exchanger by circulation pipeline, the cold medium passage import of heat exchanger is communicated with atmosphere, cold medium passage export is connected with the air import of hot blast stove by second pipeline, the exhaust port of hot blast stove is connected with the air inlet of spray fluidized bed by third pipeline, the exhaust port of spray fluidized bed is connected with negative pressure source by cyclone separator, dust removal tower, the discharge port of cyclone separator is connected with the discharge port of spray fluidized bed.The utility model is simple in structure, convenient to operate, can further improve the waste heat utilization rate of gas internal combustion engine generator set, satisfy the demand of energy saving and emission reduction.

Description

Technical Field

[0001] The utility model relates to the field of ceramic production, and particularly relates to a ceramic spray coupling fluidized bed drying system. Background Art

[0002] The ceramic industry itself belongs to an energy-consuming intensive industry. A large amount of mineral resources and energy are consumed in the process of technological production, and waste gas, waste water, dust, etc. are generated, causing environmental pollution. In the process of ceramic technological production, the energy consumption is mainly electric energy and heat energy. Among them, the processing and shaping production of raw materials mainly consume electric energy, and the drying and firing of raw materials mainly consume heat energy. The energy consumption of drying and firing accounts for about 80% of the whole process.

[0003] The applicant has authorized the patent CN221014506U, which discloses using the waste heat of a gas internal combustion engine generator set as the drying medium of a drying tower supporting a ceramic spray drying device to meet the requirements of energy conservation and emission reduction.

[0004] However, the heat utilization rate of the drying tower itself supporting this ceramic spray drying device is not high.

[0005] The spray fluidized bed is a spray drying device with a small equipment volume and high evaporation intensity. How to further improve the comprehensive utilization efficiency of energy by using the spray fluidized bed to meet the requirements of energy conservation and emission reduction is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of the utility model is to provide a ceramic spray coupling fluidized bed drying system aiming at the deficiencies of the prior art, which has a simple structure and is convenient to operate, can further improve the waste heat utilization rate of the gas internal combustion engine generator set, and meet the requirements of energy conservation and emission reduction.

[0007] The technical solution of the utility model is: a ceramic spray coupling fluidized bed drying system, including a gas internal combustion engine generator set, a heat exchanger, a hot blast stove, and further including a spray fluidized bed. The smoke exhaust port of the gas internal combustion engine generator set is connected to the air inlet of the spray fluidized bed through a first pipeline. The cylinder jacket cooling cavity of the gas internal combustion engine generator set is connected to the heat medium channel of the heat exchanger through a circulating pipeline. The inlet of the cold medium channel of the heat exchanger is communicated with the atmosphere, and the outlet of the cold medium channel is connected to the air inlet of the hot blast stove through a second pipeline. The smoke exhaust port of the hot blast stove is connected to the air inlet of the spray fluidized bed through a third pipeline. The exhaust port of the spray fluidized bed is connected to a negative pressure source through a cyclone separator and a dedusting tower. The discharge port of the cyclone separator is connected to the discharge port of the spray fluidized bed.

[0008] It further includes an emergency cooling source, and the emergency cooling source is connected to the circulating pipeline.

[0009] A first valve is installed on the first pipeline, a second valve is installed on the second pipeline, and a third valve is installed on the third pipeline.

[0010] A bypass flue is provided on the first pipeline, located upstream of the first valve, and a fourth valve is provided on the bypass flue.

[0011] The heat exchanger is a plate heat exchanger, with the hot medium passage being the tube side and the cold medium passage being the shell side.

[0012] The dust removal tower is a spray scrubbing tower.

[0013] The spray fluidized bed is equipped with a horizontally extending feed pipe. The upstream end of the feed pipe is connected to the feed source, and a feed pump is installed on the feed pipe. The downstream end of the feed pipe is sealed, and multiple upward-facing atomizing nozzles are installed on the section of the feed pipe located in the spray fluidized bed. N gas phase nozzles are arranged sequentially along the feed flow direction in the spray fluidized bed, located below the feed pipe. The first N-1 gas phase nozzles correspond to the atomizing nozzles of the feed pipe and are connected to the air inlet of the spray fluidized bed. The last nozzle is connected to the atmosphere via a blower.

[0014] The above technical solution has the following beneficial effects:

[0015] 1. The ceramic spray-coupled fluidized bed drying system includes a gas-fired internal combustion engine generator set, a heat exchanger, a hot air furnace, and a spray fluidized bed. The gas-fired internal combustion engine generator set generates electricity using natural gas to power other electrical equipment and provides high-temperature flue gas as waste heat. The heat exchanger uses the heat from the cooling water of the gas-fired internal combustion engine generator set as a heating medium to preheat the air entering the hot air furnace. The hot air furnace provides high-temperature gas to the spray fluidized bed, which is used to dry ceramic raw materials. The exhaust port of the gas-fired internal combustion engine generator set is connected to the air inlet of the spray fluidized bed via a first pipeline. The generated high-temperature flue gas enters the spray fluidized bed through the first pipeline and serves as a drying medium to thoroughly remove moisture from the ceramic raw materials. The cylinder liner cooling chamber of the gas-fired internal combustion engine generator set is connected to the heat medium channel of the heat exchanger via a circulation pipeline. The inlet of the cold medium channel of the heat exchanger is open to the atmosphere, and the outlet of the cold medium channel is connected to the air inlet of the hot blast stove via a second pipeline. The cooling water heated in the cylinder liner cooling chamber acts as a heat medium in the heat exchanger, heating the cold air while being cooled by the cold air itself. It then returns to the cylinder liner cooling chamber as coolant for recycling. The heated air enters the hot blast stove as an oxygen source, effectively improving the combustion efficiency of natural gas and the thermal energy utilization rate in the hot blast stove. The exhaust port of the hot blast stove is connected to the air inlet of the spray fluidized bed via a third pipeline, serving as a drying medium to thoroughly remove moisture from the ceramic raw materials. The exhaust port of the spray fluidized bed is connected to a negative pressure source via a cyclone separator, a dust removal tower, and the discharge port of the cyclone separator. The discharge port of the spray fluidized bed is connected to the discharge port of the ceramic raw material (in liquid state). After atomization, the ceramic raw material is sent to the spray fluidized bed and dehydrated by the drying medium in a "boiling state". Most of the dried ceramic raw material is discharged through the discharge port of the spray fluidized bed and used as raw material. Small particles of dried ceramic raw material enter the cyclone separator with the airflow, are separated and recycled as raw material. The exhaust gas contains ceramic raw material dust, which is washed off by the dust removal tower and then discharged into the atmosphere. This not only effectively improves the drying efficiency of the ceramic raw material and ensures the utilization efficiency of the waste heat of the gas internal combustion engine generator set, but also meets environmental protection requirements.

[0016] 2. It also includes an emergency cooling source, which is connected to the circulation pipeline. When the hot air furnace is under maintenance, the emergency cooling source is used to cool the gas internal combustion engine generator set to ensure that the gas internal combustion engine generator set can supply power to the outside world normally.

[0017] 3. A first valve is installed on the first pipeline, a second valve is installed on the second pipeline, and a third valve is installed on the third pipeline. A bypass flue is installed on the first pipeline, located upstream of the first valve. A fourth valve is installed on the bypass flue. The drying power of the spray fluidized bed can be controlled by opening or closing the corresponding valve to meet the actual needs of the enterprise.

[0018] 4. A horizontally extending feed pipe is installed inside the spray fluidized bed. The upstream end of the feed pipe is connected to the feed source, and a feed pump is installed on the feed pipe. The downstream end of the feed pipe is sealed, and multiple upward-facing atomizing nozzles are installed on the section of the feed pipe inside the spray fluidized bed. The ceramic feed is pumped to the atomizing nozzles and sprayed upwards. N gas-phase nozzles are arranged sequentially along the feed flow direction inside the spray fluidized bed, located below the feed pipe. The first N-1 gas-phase nozzles correspond to the atomizing nozzles of the feed pipe and are connected to the air inlet of the spray fluidized bed. That is, the atomized ceramic raw material is dehydrated by the high-temperature gas blown out by the first N-1 gas-phase nozzles and transferred to the rear while maintaining a "boiling state". The last nozzle is connected to the atmosphere through a blower and blows out room temperature air. This can not only cool the dehydrated ceramic raw material and maintain a "boiling state" for transfer to the outlet, but also reduce the amount of high-temperature gas used, further improve the waste heat utilization rate, and meet the requirements of energy conservation and emission reduction.

[0019] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] In the attached diagram, 1 is a gas-fired internal combustion engine generator set, 2 is a heat exchanger, 3 is a hot air furnace, 4 is a spray fluidized bed, 41 is a feed pipe, 42 is a feed pump, 43 is an atomizing nozzle, 44 is a gas phase nozzle, 45 is a blower, 5 is a cyclone separator, 6 is a dust removal tower, 7 is an emergency cooling source, 11 is the first pipeline, 12 is the second pipeline, 13 is the third pipeline, 14 is a circulation pipeline, 15 is a bypass flue, a is the first valve, b is the second valve, c is the third valve, and d is the fourth valve. Detailed Implementation

[0022] See Figure 1This is a specific embodiment of a ceramic spray-coupled fluidized bed drying system. The ceramic spray-coupled fluidized bed drying system includes a gas-fired internal combustion engine generator set 1, a heat exchanger 2, a hot air furnace 3, and a spray fluidized bed 4. In this embodiment, the gas-fired internal combustion engine generator set and the hot air furnace are conventional equipment. The heat exchanger 2 is a plate heat exchanger, with the hot medium channel being the tube side and the cold medium channel being the shell side. A horizontally extending feed pipe 41 is installed inside the spray fluidized bed. The upstream end of the feed pipe is connected to a feed source, and a feed pump 42 is installed on the feed pipe. The downstream end of the feed pipe is sealed, and the section of the feed pipe located within the spray fluidized bed is equipped with... Multiple upward-facing atomizing nozzles 43 are provided. The ceramic raw material liquid is pumped to each atomizing nozzle and atomized before being sprayed upwards. Four gas-phase nozzles 44 are sequentially arranged along the liquid flow direction within the spray fluidized bed, located below the liquid pipe 41. The first three gas-phase nozzles correspond to the atomizing nozzles of the liquid pipe and are connected to the air inlet of the spray fluidized bed. The last nozzle is connected to the atmosphere via a blower 45. Clearly, the discharge port of the spray fluidized bed is located behind the last gas-phase nozzle, and the exhaust port is located at the top of the spray fluidized bed. The exhaust port of the gas-fired internal combustion engine generator set 1 is connected to the air inlet of the spray fluidized bed 4 via a first pipeline 11, on which a first valve a is installed. The cylinder liner cooling chamber of the gas-fired internal combustion engine generator set 1 is connected to the heat medium channel of the heat exchanger 2 via a circulation pipeline 14. To meet practical needs, an emergency cooling source 7 is also included, connected to the circulation pipeline 14. The inlet of the cold medium channel of heat exchanger 2 is connected to the atmosphere, and the outlet of the cold medium channel is connected to the air inlet of hot blast furnace 3 via a second pipe 12. A second valve b is installed on the second pipe 12. The exhaust port of the hot blast furnace 3 is connected to the air inlet of spray fluidized bed 4 via a third pipe 13. A third valve c is installed on the third pipe 13. Specifically, the third pipe is connected in parallel to the first pipe and is located downstream of the first valve. To meet actual needs, a bypass flue 15 is installed on the first pipe 11, located upstream of the first valve a. A fourth valve d is installed on the bypass flue 15. The exhaust port of spray fluidized bed 4 is connected to a negative pressure source via a cyclone separator 5 and a dust removal tower 6. Typically, the dust removal tower 6 is selected as a spray scrubbing tower, and the negative pressure source is selected as a negative pressure fan. The discharge port of the cyclone separator 5 is connected to the discharge port of spray fluidized bed 4.

[0023] The working principle of this invention is as follows: When the spray fluidized bed load is low (the high-temperature flue gas discharged from the gas-fired internal combustion engine generator set is sufficient to meet production needs) or when the hot air furnace is shut down for maintenance, the second, third, and fourth valves are closed, and the first valve is opened. The high-temperature flue gas discharged from the gas-fired internal combustion engine generator set enters the spray fluidized bed as a drying medium to dehydrate the atomized ceramic raw material and keep it in a boiling state. Simultaneously, an emergency cooling source is used to cool the gas-fired internal combustion engine generator set. The dehydrated ceramic raw material is cooled by airflow at the fourth gas phase nozzle and then discharged from the discharge port. When the gas-fired internal combustion engine generator set is shut down for maintenance or commissioning, the first valve is closed, and the second, third, and fourth valves are opened. High-temperature flue gas from the hot air furnace enters the spray fluidized bed as a drying medium. When the device is operating normally, the first valve, the second valve, and the third valve are opened, and the fourth valve is closed. The oxygen source for the hot air furnace is preheated air. The high-temperature flue gas discharged from the gas-fired internal combustion engine generator set and the high-temperature flue gas discharged from the hot air furnace are used together as the drying medium to enter the spray fluidized bed. The overall energy utilization efficiency of the entire device is high.

Claims

1. A ceramic spray-coupled fluidized bed drying system, comprising a gas-fired internal combustion engine generator set (1), a heat exchanger (2), and a hot air furnace (3), characterized in that: It also includes spray fluidized beds (4), The exhaust port of the gas internal combustion engine generator set (1) is connected to the air inlet of the spray fluidized bed (4) via a first pipeline (11). The cylinder liner cooling chamber of the gas internal combustion engine generator set (1) is connected to the hot medium channel of the heat exchanger (2) via a circulation pipeline (14). The inlet of the cold medium channel of the heat exchanger (2) is connected to the atmosphere. The outlet of the cold medium channel is connected to the air inlet of the hot air furnace (3) via a second pipeline (12). The exhaust port of the hot air furnace (3) is connected to the air inlet of the spray fluidized bed (4) via a third pipeline (13). The exhaust port of the spray fluidized bed (4) is connected to the negative pressure source via the cyclone separator (5) and the dust removal tower (6), and the discharge port of the cyclone separator (5) is connected to the discharge port of the spray fluidized bed (4).

2. The ceramic spray-coupled fluidized bed drying system according to claim 1, characterized in that: It also includes an emergency cooling source (7), which is connected to the circulation pipeline (14).

3. The ceramic spray-coupled fluidized bed drying system according to claim 1, characterized in that: A first valve (a) is provided on the first pipeline (11), a second valve (b) is provided on the second pipeline (12), and a third valve (c) is provided on the third pipeline (13).

4. The ceramic spray-coupled fluidized bed drying system according to claim 1, characterized in that: A bypass flue (15) is provided on the first pipeline (11), located upstream of the first valve (a), and a fourth valve (d) is provided on the bypass flue (15).

5. The ceramic spray-coupled fluidized bed drying system according to claim 1, characterized in that: The heat exchanger (2) is a plate heat exchanger, with the hot medium passage being the tube side and the cold medium passage being the shell side.

6. The ceramic spray-coupled fluidized bed drying system according to claim 1, characterized in that: The dust removal tower (6) is a spray scrubbing tower.

7. The ceramic spray-coupled fluidized bed drying system according to claim 1, characterized in that: The spray fluidized bed (4) is provided with a horizontally extending liquid pipe (41). The upstream end of the liquid pipe is connected to the liquid source. A feed pump (42) is provided on the liquid pipe. The downstream end of the liquid pipe is sealed. Multiple upward-facing atomizing nozzles (43) are provided on the pipe section of the liquid pipe located in the spray fluidized bed. N gas phase nozzles (44) are arranged sequentially along the liquid flow direction in the spray fluidized bed. They are located below the liquid pipe (41). The first N-1 gas phase nozzles correspond to the atomizing nozzles of the liquid pipe and are connected to the air inlet of the spray fluidized bed. The last nozzle is connected to the atmosphere via a blower (45).

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