CN203286573U - Salty waste water burning system - Google Patents

Abstract

A saline wastewater incineration treatment system is disclosed, relating to the field of saline wastewater incineration treatment. Its technical solution changes the traditional method of rapid cooling with large amounts of water, employing radiant heat exchangers to effectively reduce flue gas temperature. Furthermore, a coal-fired generator provides high-temperature flue gas, overcoming the high cost of natural gas combustion. In addition, multiple circulating flue gas pipes are installed throughout the system to effectively control the flue gas temperature while recovering heat energy, for example, preventing the salt in the saline wastewater from becoming molten; the temperature entering the multi-tube dust collector and the high-temperature dust collector is controlled at 600℃~650℃, effectively improving dust removal efficiency.

Description

A kind of saline wastewater incineration treatment system

technical field

The utility model relates to the field of saline wastewater incineration treatment, in particular to a saline wastewater incineration treatment system capable of efficiently recovering organic salts.

Background technique

At present, it is inevitable to produce a large amount of high-salt wastewater in industrial production. The traditional process generally adopts the method of incinerating high-salt wastewater. The existing problems are: 1. The saline wastewater must be cooled by rapid cooling after incineration. The traditional method is to use a large amount of water for mixing and cooling, and the quenched water needs to be discharged to the sewage treatment plant for subsequent treatment, which greatly wastes water resources and the subsequent treatment process is complicated, and the investment cost is high; 2. During the incineration process, If the incineration temperature is too high, the salt will melt, and the molten salt will penetrate into the refractory material of the incinerator, causing the refractory material to be peeled off layer by layer, and the life of the refractory material will be greatly shortened; 3. The heat energy after incineration cannot be recovered , high energy consumption; 4. Molten salt and other substances incinerated at high temperature will produce insoluble matter, which will block equipment and systems; 5. The salt after quenching will become floating dust and cause serious pollution to the surrounding environment. Room for improvement.

The Chinese patent application number is 201210362762.7, which discloses a salt-containing organic wastewater submerged incineration quenching treatment device and method, which includes an incinerator, a wastewater supply system for supplying salt-containing organic wastewater to the combustion chamber of the incinerator, and a combustion chamber for the incinerator. The fuel gas supply system for supplying fuel gas indoors, the combustion air supply system for inputting combustion air into the combustion chamber of the incinerator, the flue gas quenching system for quenching the reaction products in the incinerator to lower the temperature, and the flue gas contained in the quenched flue gas The salt cleaning cleans the flue gas dedusting system. After the salt-containing organic wastewater is oxidized in the incinerator, the salt-containing flue gas can be quenched to achieve gas-liquid two-phase equilibrium, and the separation and recovery of salt-containing substances can be realized. After the flue gas after quenching is dedusted by the Venturi dust collector, it meets the environmental protection emission standard of flue gas and is discharged through the chimney. This technical solution also uses the incineration method to deal with high-content brine solutions, but the incineration temperature is controlled at 1050~1150°C, which exceeds the melting point of salt, and molten salt will be formed during the incineration process, which cannot overcome the penetration of molten salt In the refractory material of the incinerator, the refractory material will be peeled off and damaged layer by layer, which greatly shortens the service life of the refractory material, and a salt solution will be generated during the rapid cooling process, and the solid salt cannot be effectively separated to realize gas-liquid Separation, and its dust removal also uses wet dust removal, which still does not overcome the shortcomings of wasting a lot of water in the prior art, and the heat energy generated by high-temperature flue gas is not recycled, and the energy consumption is relatively large. Room for improvement.

Contents of the invention

In order to solve the above technical problems, the utility model provides an energy-saving and environment-friendly saline wastewater incineration treatment system and its treatment method which can effectively process and recycle solid salt in saline wastewater and greatly improve the treatment efficiency.

The technical key of this utility model is to change the previous method of rapid cooling with a large amount of water, use a radiation radiator for heat exchange, effectively reduce the temperature of the flue gas, and provide high-temperature flue gas through a coal-burning machine, so as to overcome the high cost of burning natural gas. In addition, multiple circulating flue gas pipes are installed in the whole system to effectively control the flue gas at an appropriate temperature while recovering heat energy, for example: to prevent the salt in the saline wastewater from becoming molten; The temperature of the cotton high-temperature dust collector is controlled at 600 ° C ~ 650 ° C, etc. Effectively improve the efficiency of dust removal. The specific technical solution is: a saline wastewater incineration treatment system, including an incinerator, wastewater booster equipment for pumping high-pressure atomized wastewater into the incinerator, gas supply equipment for feeding high-temperature flue gas into the incinerator, and Auxiliary combustion equipment that feeds combustion-supporting gas, a cooling device that quenches the product obtained from the reaction in the incinerator, and a dust removal device that purifies the quenched flue gas. It is characterized in that the gas supply equipment is a coal-fired machine. The high-temperature flue gas produced by the machine is connected to the incinerator through pipelines; the cooling device is a radiation radiator, the inlet of the radiation radiator is connected to the smoke exhaust pipe at the bottom of the incinerator, and the outlet pipe is connected to the dust removal equipment; the dust removal equipment includes at least one multi-pipe Dust collector, at least one Taimian high-temperature dust collector, the flue gas outlet of the multi-pipe dust collector is connected to the flue gas inlet of the Taimian high-temperature dust collector through pipelines in sequence, and the dust outlet at the bottom of the multi-pipe dust collector is connected to the Taimian high-temperature dust collector The dust outlet pipe at the bottom end of the dust collector is connected, and the dust outlet at the bottom end of the Taimian high-temperature dust collector is additionally provided with a pipe connected to the air-flow conveying system; the flue gas outlet pipe of the Taimian high-temperature dust collector is connected to the preheating boiler, and the preheating boiler passes through the pipeline in turn Connect air preheater, water softener heater and smoke exhaust fan.

As a further improvement of the utility model, a circulating flue gas pipeline is additionally provided on the radiant radiator to communicate with the coal burner. Through this arrangement, a part of the heat energy of the flue gas can be recycled while effectively reducing the temperature of the flue gas.

As a further improvement of the utility model, another circulating flue gas pipeline is provided on the pipeline between the flue gas outlet of the multi-pipe dust collector and the flue gas inlet of the Taimian high temperature dust collector to communicate with the coal burner. Through this arrangement, a part of the heat energy of the flue gas can be recycled while effectively reducing the temperature of the flue gas.

As a further improvement of the utility model, a second-stage multi-tube dust collector is added to the circulating flue gas pipeline, and the dust outlet pipe at the bottom of the second-level multi-tube dust collector is connected to the dust outlet at the bottom of the Taimian high-temperature dust collector. Through this setting, the flue gas can be further dedusted and the organic salts in the flue gas can be effectively separated.

As a further improvement of the utility model, a flue gas circulation fan is additionally provided on the pipeline between the flue gas outlet of the multi-pipe dust collector and the flue gas inlet of the Taimian high temperature dust collector. Through this arrangement, the flue gas delivery efficiency is improved.

As a further improvement of the utility model, the pipeline between the dust outlet at the bottom of the two-stage multi-pipe dust collector and the dust outlet at the bottom of the Taimian high-temperature dust collector and the dust outlet at the bottom of the multi-pipe dust collector The pipes between the dust outlets at the bottom are connected, and an air conveying fan is added. This setting can effectively save the length of the pipeline and improve the transportation efficiency of organic salt dust.

As a preference, a clean room is added on the pipeline between the coal burner and the incinerator. Reduce excess impurities in high temperature flue gas.

As a further improvement of the utility model, the auxiliary combustion equipment is a natural gas burner, which is installed on the pipeline for connecting the coal burner and the incinerator, which is arranged tangentially to the furnace body of the incinerator. Through this setting, an appropriate amount of natural gas is passed through to effectively control the flue gas temperature in the incinerator.

The beneficial effect of the utility model: greatly simplifies the technological process, simplifies and reliable operation, and greatly improves the continuity of production; reduces equipment investment and shortens the construction period; during the incineration process, salt will not become molten salt, which solves the problem of molten salt Erosion of refractory materials greatly improves the service life of refractory materials; heat energy (medium pressure steam) can be recovered; water is not consumed and waste water is not produced; waste residue can be comprehensively utilized or treated as ordinary waste; flue gas is not Contains dust, which can fully meet the discharge standards; a large amount of solid salt is recovered.

Description of drawings

Fig. 1 is the structural representation of the utility model system.

Fig. 2 is the technological structure schematic diagram of the present utility model.

Detailed ways

Example 1: A saline waste water incineration treatment system, including an incinerator 003, a waste water pressurization device 017 that pumps high-pressure atomized waste water into the incinerator, a gas supply device that feeds high-temperature flue gas into the incinerator, and feeds the incinerator Auxiliary combustion equipment that feeds combustion-supporting gas, a cooling device that quenches the product obtained from the reaction in the incinerator, and a dust removal device that purifies the quenched flue gas. The gas supply equipment is coal-burning machine 001, coal-burning machine 001 The generated high-temperature flue gas is connected to the incinerator 003 through the pipeline 002; the cooling device is a radiation radiator 004, and the inlet of the radiation radiator 004 is connected to the smoke exhaust pipeline 002 at the bottom of the incinerator 003, and the outlet pipeline 002 is connected to the dust removal equipment; the dust removal The equipment includes at least one multi-pipe dust collector 005 and at least one Taimian high-temperature dust collector 006. The flue gas outlet of the multi-pipe dust collector 005 is connected to the flue gas inlet of the Taimian high-temperature dust collector 006 in sequence through a pipeline 002. The multi-pipe The dust outlet at the bottom of the dust collector 005 communicates with the dust outlet pipeline 021 at the bottom of the Taimian high-temperature dust collector 006, and an additional pipeline 021 is added to the dust outlet at the bottom of the Taimian high-temperature dust collector 006 to connect to the air delivery system 007; The flue gas outlet pipe 002 of the dust collector 006 is connected to the preheating boiler 008, and the preheating boiler 008 is connected to the air preheater 009 and the exhaust fan 010 through the pipe 002 in turn.

Embodiment 2: Referring to Embodiment 1, a circulating flue gas pipeline 012 is additionally provided on the radiant radiator 004 to communicate with the coal burner 001 .

Embodiment 3: Referring to Embodiment 1 or 2, a circulating flue gas pipeline 012 is provided on the pipeline between the flue gas outlet of the multi-pipe dust collector 005 and the flue gas inlet of the Taimian high-temperature dust collector 006 to communicate with the coal burner 001.

Embodiment 4: With reference to Embodiment 1 or 2 or 3, a secondary multi-pipe dust collector 051 is added on the circulating flue gas pipeline 012, and the dust outlet pipeline at the bottom of the secondary multi-pipe dust collector 051 is connected to the Taimian high-temperature dust collector The dust outlet at the bottom of 006.

Embodiment 5: Referring to Embodiment 4, a flue gas circulation fan 013 is additionally provided on the pipeline between the flue gas outlet of the multi-pipe dust collector 005 and the flue gas inlet of the Taimian high temperature dust collector 006. .

Embodiment 6: With reference to embodiment 1, the dust outlet between the dust outlet at the bottom of the two-stage multi-tube dust collector 051 and the dust outlet at the bottom of the Taimian high-temperature dust collector 006 and the dust outlet at the bottom of the multi-tube dust collector 005 and The pipeline 021 between the dust outlets at the bottom of the Taimian high-temperature dust collector 006 is connected, and an airflow conveying fan 014 is added.

Embodiment 7: Referring to Embodiment 1, a clean room 015 is added on the pipeline 002 between the coal burner 001 and the incinerator 003.

Embodiment 8: Referring to Embodiment 1, the auxiliary combustion equipment is a natural gas burner 016, which is installed on the pipeline 002 for connecting the coal burner 001 and the incinerator 003, which is arranged tangentially to the furnace body of the incinerator 003.

Claims (8)

1. A saline wastewater incineration treatment system, including an incinerator, a wastewater booster device that pumps high-pressure atomized wastewater into the incinerator, a gas supply device that feeds high-temperature flue gas into the incinerator, and feeds combustion-supporting equipment into the incinerator Auxiliary combustion equipment for gas, a cooling device for quenching the product obtained from the reaction in the incinerator, and a dust removal equipment for purifying the quenched flue gas, characterized in that the gas supply equipment is a coal burner, and the high temperature generated by the coal burner The flue gas is connected to the incinerator through pipelines; the cooling device is a radiation radiator, the inlet of the radiation radiator is connected to the smoke exhaust pipe at the bottom of the incinerator, and the outlet pipe is connected to the dust removal equipment; the dust removal equipment includes at least one multi-pipe dust collector, at least A Taimian high-temperature dust collector, the flue gas outlet of the multi-pipe dust collector and the flue gas inlet of the Taimian high-temperature dust collector are connected in sequence through pipelines, the dust outlet at the bottom of the multi-pipe dust collector is connected to the dust at the bottom of the Taimian high-temperature dust collector The outlet pipeline is connected, and the dust outlet at the bottom of the Taimian high-temperature dust collector is additionally provided with a pipeline connected to the air-flow conveying system; the flue gas outlet pipe of the Taimian high-temperature dust collector is connected to the preheating boiler, and the preheating boiler is connected to the air preheating boiler in turn through the pipeline. machine and exhaust fan. 2. The saline waste water incineration treatment system according to claim 1, characterized in that a circulating flue gas pipeline is additionally provided on the radiant radiator to communicate with the coal burner. 3. A kind of saline wastewater incineration treatment system according to claim 1, characterized in that a circulating flue gas pipeline is additionally set up on the pipeline between the flue gas outlet of the multi-pipe dust collector and the flue gas inlet of the Taimian high temperature dust collector Connected to the coal burner. 4. A kind of saline wastewater incineration treatment system according to claim 3, characterized in that a secondary multi-pipe dust collector is added on the circulating flue gas pipeline, and the dust outlet pipeline at the bottom of the secondary multi-pipe dust collector is connected The dust outlet at the bottom of the Taimian high temperature dust collector. 5. A kind of saline waste water incineration treatment system according to claim 3, characterized in that there is an additional circulating flue gas pipeline on the pipeline between the flue gas outlet of the multi-pipe dust collector and the flue gas inlet of the Taimian high temperature dust collector A flue gas circulation fan is added on the top. 6. A kind of saline wastewater incineration treatment system according to claim 4, characterized in that the pipeline between the dust outlet at the bottom of the second-stage multi-pipe dust collector and the dust outlet at the bottom of the Taimian high-temperature dust collector and the multi-pipe The dust outlet at the bottom of the dust collector is connected to the pipe between the dust outlet at the bottom of the Taimian high-temperature dust collector, and an airflow conveying fan is added. 7. The saline wastewater incineration treatment system according to claim 1, characterized in that a clean room is added to the pipeline between the coal burner and the incinerator. 8. A saline waste water incineration treatment system according to claim 1, characterized in that the auxiliary combustion equipment is a natural gas burner, which is arranged in a tangential arrangement with the incinerator body for connecting the coal burner to the incinerator on the pipeline.

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