Cooling and conveying system for discharged carbon of gasification furnace

Abstract

The utility model relates to a cooling and conveying system for discharged carbon of a gasification furnace, which comprises a Roots blower, a water-cooling screw conveyor, a pneumatic conveying stock bin, a cyclone separator, a cooling carbon stock bin, a pulse bag-type dust collector and a water-cooling condenser which are connected to form a closed-loop pneumatic conveying circulating system, the pneumatic conveying stock bin is connected with a Roots blower and a cyclone separator, the bottom of the cyclone separator is provided with a cooling carbon stock bin, the top of the cyclone separator is connected with a pulse bag-type dust collector, the pulse bag-type dust collector is connected with a water-cooled condenser, and gas cooled by the water-cooled condenser is fed into the Roots blower through a pipeline. According to the utility model, water-cooling spiral and nitrogen pneumatic conveying two-stage cooling is adopted, so that the temperature of discharged carbon is reduced, uncooled sparks entrained in discharged carbon are extinguished in the conveying process by utilizing an oxygen-deficient environment, the hidden danger of material accumulation spontaneous combustion is completely eradicated, and the safe operation is ensured; meanwhile, a nitrogen recycling system is adopted, nitrogen consumption of the system is further reduced, and the system operation cost is reduced.

Description

Technical Field

[0001] The utility model relates to a carbon discharging and cooling conveying system, in particular to a gasifier carbon discharging and cooling conveying system which adopts the form of primary cooling by a water-cooled screw conveyor and secondary cooling by nitrogen pneumatic conveying, avoids the accumulation and spontaneous combustion of carbon powder, ensures safe discharging, reduces the nitrogen consumption of the system and lowers the operation cost of the system. Background Technique

[0002] When the carbon particles produced by the gasifier are discharged from the furnace body, they are generally in a high-temperature state, and some of the discharged carbon also carries carbon powder sparks that have not fully reacted in the furnace. Without cooling, accidents such as accumulation and spontaneous combustion are likely to occur during the collection process. The cooling methods adopted in the market are generally relatively single, and none of them can well ensure the safety of carbon discharging, and accidents of accumulation and spontaneous combustion still occur from time to time. Content of the Utility Model

[0003] Aiming at the above problems, the main purpose of the utility model is to provide a gasifier carbon discharging and cooling conveying system which adopts the form of primary cooling by a water-cooled screw conveyor and secondary cooling by nitrogen pneumatic conveying, avoids the accumulation and spontaneous combustion of carbon powder, ensures safe discharging, reduces the nitrogen consumption of the system and lowers the operation cost of the system.

[0004] The utility model solves the above technical problems through the following scheme: a gasifier carbon discharging and cooling conveying system, the gasifier carbon discharging and cooling conveying system includes: a Roots blower, a water-cooled screw conveyor, a pneumatic conveying bin, a cyclone separator, a cooling carbon bin, a pulse bag filter, a water-cooled condenser; the Roots blower is connected in series with the pneumatic conveying bin, the cyclone separator, the pulse bag filter, and the water-cooled condenser to form a closed-loop pneumatic conveying circulation system.

[0005] The top of the water-cooled screw conveyor is provided with an inlet for the high-temperature carbon discharged from the gasifier to be cooled, the bottom of the water-cooled screw conveyor is provided with a pneumatic conveying bin, the pneumatic conveying bin is connected with a Roots blower and a cyclone separator through pipelines, the bottom of the cyclone separator is provided with a cooling carbon bin for the separated finished cooling carbon to enter, the top of the cyclone separator is connected with a pulse bag filter through a pipeline, the pulse bag filter is connected with a water-cooled condenser for cooling the gas, and the gas cooled by the water-cooled condenser is sent into the Roots blower through a pipeline.

[0006] In a specific embodiment of the utility model, a screw carbon discharging gate is arranged between the water-cooled screw conveyor and the pneumatic conveying bin, a separator discharging gate is arranged between the cyclone separator and the cooling carbon bin, a dust discharging gate of the dust collector is arranged at the bottom of the pulse bag filter, and a screw carbon inlet gate is arranged at the inlet of the high-temperature carbon at the top of the water-cooled screw conveyor.

[0007] In a specific embodiment of the present utility model, a blower outlet regulating ball valve and a blower outlet pressure measuring point are installed on the pipeline between the Roots blower and the pneumatic conveying silo.

[0008] In a specific embodiment of the present utility model, a separator outlet pressure measuring point is installed on the pipeline between the cyclone separator and the pulse bag filter.

[0009] In a specific embodiment of the present utility model, a vacuum pump for evacuating the system vacuum before startup and a vacuum pump suction ball valve are provided on the pipeline between the water-cooled condenser and the Roots blower.

[0010] In a specific embodiment of the present utility model, a nitrogen filling pipeline is provided on the pipeline between the water-cooled condenser and the Roots blower. A nitrogen filling ball valve is provided on the nitrogen filling pipeline. A temperature measuring point is provided on the air inlet pipeline of the Roots blower, and a blower outlet regulating ball valve and an outlet pressure measuring point are provided on the air outlet pipeline; the blower inlet temperature measuring point is interlocked with the blower outlet regulating ball valve to control the blower circulation flow rate, and the outlet pressure measuring point is interlocked with the nitrogen filling ball valve to control the nitrogen filling of the system.

[0011] In a specific embodiment of the present utility model, the water-cooled condenser is a condenser adopting a spiral finned tube structure.

[0012] The positive and progressive effects of the present utility model are as follows: Compared with common similar technologies, the carbon cooling and conveying system for the gasifier provided by the present utility model adopts double-stage cooling of water-cooled spiral and nitrogen pneumatic conveying. While reducing the carbon outlet temperature, it utilizes an oxygen-deficient environment to extinguish the uncooled sparks entrained in the carbon during transportation, completely eliminating the hidden danger of spontaneous combustion caused by material accumulation and ensuring safe operation; at the same time, a nitrogen circulation recovery system is adopted to further reduce the nitrogen consumption of the system and lower the system operation cost. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0014] The following are the names corresponding to the reference numerals in the present utility model:

[0015] 1 - Roots blower, 2 - blower outlet regulating ball valve, 3 - blower outlet pressure measuring point, 4 - water-cooled screw conveyor, 5 - spiral carbon inlet gate, 6 - spiral carbon outlet gate, 7 - pneumatic conveying silo, 8 - cyclone separator, 9 - separator discharge gate, 10 - cooled carbon silo, 11 - separator outlet pressure measuring point, 12 - pulse bag filter, 13 - dust collector ash discharge gate, 14 - water-cooled condenser, 15 - vacuum pump, 16 - vacuum pump suction ball valve, 17 - nitrogen filling ball valve, 18 - blower inlet temperature measuring point. Detailed Embodiments

[0016] The following provides a preferred embodiment of the present utility model in conjunction with the accompanying drawings to elaborate in detail on the technical solution of the present utility model.

[0017] Figure 1 As shown in the overall structural schematic diagram of the present utility model, Figure 1 as follows: A carbon outlet cooling and conveying system for a gasifier provided by the present utility model includes: a Roots blower 1, a water-cooled screw conveyor 4, a pneumatic conveying bin 7, a cyclone separator 8, a cooling carbon bin 10, a pulse bag filter 12, and a water-cooled condenser 14; The top of the water-cooled screw conveyor 4 is provided with an inlet for the high-temperature carbon discharged from the gasifier to be cooled, and the bottom of the water-cooled screw conveyor 4 is provided with a pneumatic conveying bin 7. The pneumatic conveying bin 7 is connected to the Roots blower 1 and the cyclone separator 8 through pipelines. The bottom of the cyclone separator 8 is provided with a cooling carbon bin 10 into which the separated finished cooling carbon enters. The top of the cyclone separator 8 is connected to the pulse bag filter 12 through a pipeline. The pulse bag filter 12 is connected to a water-cooled condenser 14 for cooling the gas. The gas cooled by the water-cooled condenser 14 is connected to the Roots blower 1 through a pipeline.

[0018] A fan outlet regulating ball valve 2 and a fan outlet pressure measuring point 3 are installed on the pipeline between the Roots blower 1 and the pneumatic conveying bin 7. A separator outlet pressure measuring point 11 is installed on the pipeline between the cyclone separator 8 and the pulse bag filter 12. A vacuum pump 15 for evacuating the system vacuum before startup and a vacuum pump suction ball valve 16 are provided on the pipeline between the water-cooled condenser 14 and the Roots blower 1.

[0019] In the present utility model, the high-temperature carbon discharged from the gasifier enters the water-cooled screw conveyor 4. After primary cooling, it enters the pneumatic conveying bin 7 through the screw carbon outlet gate 6; The high-speed nitrogen introduced into the pneumatic conveying bin 7 by the Roots blower 1 carries the material to the cyclone separator 8 for separation; The separated finished cooling carbon enters the lower cooling carbon bin 10, and the separated nitrogen enters the rear pulse bag filter 12 for dust removal and purification through the top outlet, and then is cooled down by the water-cooled condenser 14 and re-sucked by the Roots blower 1 for recycling.

[0020] The water-cooled screw conveyor 4 is connected to the pneumatic conveying bin 7 through a screw carbon outlet gate 6, and is integrally fixed on the ground foundation. The upper part is provided with a carbon inlet interface and is connected to the gasifier equipment through a screw carbon inlet gate 5.

[0021] The Roots blower 1 is connected in series with the pneumatic conveying bin 7, the cyclone separator 8, the pulse bag filter 12, and the water-cooled condenser 14 to form a closed-loop pneumatic conveying circulation system; A vacuum pump 15 and a suction ball valve 16 are externally connected to the inlet pipeline of the Roots blower for evacuating the system vacuum before startup; A nitrogen filling ball valve 17 is externally connected to the inlet pipeline of the Roots blower and is connected to the plant nitrogen pipeline to fill nitrogen into the system.

[0022] A nitrogen injection pipeline is provided on the pipeline between the water-cooled condenser 14 and the Roots blower 1. A nitrogen injection ball valve 17 is provided on the nitrogen injection pipeline. A temperature measuring point 18 is provided on the inlet pipeline of the Roots blower 1, and a blower outlet regulating ball valve 2 and an outlet pressure measuring point 3 are provided on the outlet pipeline; the blower inlet temperature measuring point 18 is interlocked with the blower outlet regulating ball valve 2 to control the blower circulation flow rate, and the outlet pressure measuring point 3 is interlocked with the nitrogen injection ball valve 17 to control the nitrogen injection into the control system.

[0023] The cyclone separator 8 is connected to the cooling carbon silo 10 through a separator discharge gate 9. The cyclone separator 8 and the gate 9 are integrated and fixed on the ground foundation. The cooling carbon silo 10 is located below the cyclone separator 8 and is replaced after being filled with feed; an outlet pressure measuring point 11 is provided on the nitrogen pipeline at the outlet of the cyclone separator 8 to monitor the nitrogen injection condition of the system.

[0024] The pulse bag filter 12 is connected to the dust removal ash gate 13 and is fixed on the ground foundation as a whole. The filter bags in the dust collector need to be replaced in time, and the ash gate discharges ash regularly to avoid system blockage.

[0025] The water-cooled condenser 14 adopts a spiral finned tube structure to arrange as many heat exchange surfaces as possible in a limited space to ensure the inlet temperature of the Roots blower 1. In the specific implementation process, the water-cooled screw machine 4 adopts spiral fins and uses a 304 stainless steel structure to avoid the carbon discharged from the gasifier carrying sparks and causing deformation of the spiral fins.

[0026] The pneumatic conveying silo 7 is a transfer silo, and its volume should not be too large. Since the carbon discharged from the screw machine contains uncooled carbon, the silo needs to be made of 304 stainless steel.

[0027] The cooling carbon silo 10 can adopt a fireproof cloth bag form and be replaced in time after being filled with feed to avoid blockage of the cyclone separator.

[0028] The working process of the system of the present utility model is as follows: Before startup, all inlet and outlet gate valves are closed, the nitrogen filling ball valve 17 is manually closed, the vacuum pump suction ball valve 16 is opened, the vacuum pump 15 is started, and the air in the system is pumped out to make the system in a low vacuum state. Then, the vacuum pump 15 and the suction ball valve 16 are closed; the nitrogen filling ball valve 17 is manually opened, and the plant nitrogen is connected to inflate the system. By observing the pressure measuring point 11 at the outlet of the separator, when the pressure at this point reaches above 5 kPa, the nitrogen filling is stopped, and the nitrogen filling ball valve 17 is closed; the cooling water for the water-cooled screw conveyor 4 and the water-cooled condenser 14 is turned on, and the roots blower 1 is started to circulate the nitrogen in the system; the nitrogen filling ball valve 17 is adjusted to automatic and interlocked with the pressure measuring point 3 at the outlet of the blower, and the blower outlet regulating ball valve 2 is adjusted to automatic and interlocked with the temperature measuring point 18 at the inlet of the blower; after the pneumatic conveying system is stably circulating, the water-cooled screw conveyor 4 is started, the screw carbon inlet gate valve 5 and the screw carbon outlet gate valve 6 are opened, and the feeding starts; the materials entering the pneumatic conveying bin are transported to the cyclone separator 8. The separator discharge gate valve 9 is opened to enable the separated cooled carbon to enter the cooled carbon bin 10 for collection. The separated nitrogen-containing dust enters the pulse bag filter 12 for dust removal and purification. The carbon ash purified is regularly discharged through the dust discharge gate valve 13 of the dust collector; the nitrogen that has been dust-removed is cooled and temperature-reduced by the water-cooled condenser 14 and then re-sucked into the cycle by the roots blower 1; after the carbon discharge of the gasifier in this cycle is completed, all the inlet and outlet gate valves of the equipment are closed, and the roots blower 1 is kept running in the cycle, waiting for the next cycle of carbon discharge, and repeating the above gate valve operations.

[0029] The carbon discharge, cooling and conveying system for the gasifier provided by the present utility model adopts double-stage cooling of water-cooled screw and nitrogen pneumatic conveying. While reducing the carbon discharge temperature, it utilizes the oxygen-deficient environment to extinguish the uncooled sparks entrained in the carbon discharge during the conveying, completely eliminating the hidden danger of spontaneous combustion caused by material accumulation and ensuring safe operation; at the same time, it adopts a nitrogen circulation recovery system to further reduce the nitrogen consumption of the system and lower the system operation cost.

[0030] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A carbon cooling and conveying system for a gasifier, characterized in that: The carbon cooling and conveying system for gasification furnace comprises: a Roots blower, a water-cooled screw machine, a pneumatic conveying silo, a cyclone separator, a cooling carbon silo, a pulse bag dust collector, and a water-cooled condenser; the Roots blower is connected in series with the pneumatic conveying silo, the cyclone separator, the pulse bag dust collector, and the water-cooled condenser to form a closed-loop pneumatic conveying circulation system; An inlet for high-temperature carbon from a gasifier that needs to be cooled is provided at the top of the water-cooled screw machine, a pneumatic conveying silo is provided at the bottom of the water-cooled screw machine, the pneumatic conveying silo is connected to a Roots blower and a cyclone separator through a pipeline, a cooling carbon silo into which the separated finished cooling carbon enters is provided at the bottom of the cyclone separator, a pulse bag dust collector is connected to the top of the cyclone separator through a pipeline, the pulse bag dust collector is connected to a water-cooled condenser for cooling the gas, and the gas cooled by the water-cooled condenser is sent to the Roots blower through a pipeline.

2. The carbon cooling and conveying system for gasification furnace according to claim 1 is characterized in that: A spiral carbon discharge gate is provided between the water-cooled screw machine and the pneumatic conveying silo, a separator discharge gate is provided between the cyclone separator and the cooling carbon silo, a dust collector ash discharge gate is provided at the bottom of the pulse bag dust collector, and a spiral carbon inlet gate is provided at the inlet of the high-temperature carbon at the top of the water-cooled screw machine.

3. The carbon cooling and conveying system for gasification furnace according to claim 1 is characterized in that: A blower outlet regulating ball valve and a blower outlet pressure measuring point are installed on the pipeline between the Roots blower and the pneumatic conveying silo.

4. The carbon cooling and conveying system for gasification furnace according to claim 1 is characterized in that: A separator outlet pressure measuring point is installed on the pipeline between the cyclone separator and the pulse bag dust collector.

5. The carbon cooling and conveying system for gasification furnace according to claim 1 is characterized in that: A vacuum pump and a vacuum pump ball valve for evacuating the system vacuum before startup are arranged on the pipeline between the water-cooled condenser and the Roots blower.

6. The carbon cooling and conveying system for gasification furnace according to claim 1, characterized in that: A nitrogen charging pipe is provided on the pipeline between the water-cooled condenser and the Roots blower, and a nitrogen charging ball valve is provided on the nitrogen charging pipe. A temperature measuring point is provided on the air inlet pipe of the Roots blower, and a fan outlet regulating ball valve and an outlet pressure measuring point are provided on the air outlet pipe; the fan inlet temperature measuring point is interlocked with the fan outlet regulating ball valve to control the fan circulation flow rate, and the outlet pressure measuring point is interlocked with the nitrogen charging ball valve to control the system nitrogen charging.

7. The carbon cooling and conveying system for gasification furnace according to claim 1 is characterized in that: The water-cooled condenser is a condenser that adopts a spiral fin tube structure.

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