CN109852425B - Gasification device internal circulation cooling system - Google Patents
Gasification device internal circulation cooling system Download PDFInfo
- Publication number
- CN109852425B CN109852425B CN201910013970.8A CN201910013970A CN109852425B CN 109852425 B CN109852425 B CN 109852425B CN 201910013970 A CN201910013970 A CN 201910013970A CN 109852425 B CN109852425 B CN 109852425B
- Authority
- CN
- China
- Prior art keywords
- cooling water
- cooling
- buffer tank
- pipeline
- oxygen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses a system for cooling a gasification device, which comprises: the system comprises a gasification furnace, a cooling water buffer tank, a steam generator and an oxygen heat exchanger; the cooling water buffer tank is used for providing cooling water for a cooling system arranged in the gasification furnace to exchange heat and obtaining cooling water I after heat exchange; the steam generator is used for receiving the cooling water I and enabling the cooling water I to perform heat exchange with material flow used for generating steam to obtain cooling water II and steam after heat exchange; the oxygen heat exchanger is used for receiving part of the cooling water II and performing heat exchange with oxygen to be heated to obtain cooling water III after heat exchange and oxygen for supplying to a burner of the gasification furnace; the cooling water buffer tank is also used for receiving cooling water III and part of cooling water II. The cooling system of the invention reduces the number of devices and the investment and maintenance cost of the device; the energy utilization rate is high, the discharge of the device is reduced, and the consumption is reduced.
Description
Technical Field
The invention belongs to the technical field of coal chemical industry, and particularly relates to a system for internal circulation cooling of a gasification device.
Background
The entrained flow gasification technology is a main development direction of gasification technology in recent years due to high coal adaptability and high carbon conversion rate. The entrained flow gasifier is divided into two types, namely a hot wall furnace adopting refractory bricks and a cold wall furnace adopting a water wall. Among them, the hot wall furnace has high maintenance cost because the refractory bricks need to be replaced regularly, and in addition, has poor coal adaptability because of the limitation of the temperature endured by the refractory bricks. Therefore, the water wall gasification furnace is the main development direction of the entrained flow gasification technology.
The reaction chamber of the water-cooled wall gasification furnace mainly comprises two parts, namely a burner for conveying reaction substances and a water-cooled wall combustion chamber for substance combustion reaction, a large amount of heat is released during the reaction, the temperature of the reaction chamber is generally more than 1500 ℃, and a reliable cooling system is needed for protecting equipment in order to protect the burner and the water-cooled wall combustion chamber.
Chinese patent CN107090314A discloses a cooling method and a cooling system for a gasification burner, which only provides a cooling protection method for a burner on a cooling system for a gasifier for transporting reaction substances, but does not relate to protection of a water-cooled wall of a gasifier combustion chamber.
Chinese patent CN205603539U discloses a gasifier water-cooled wall circulating water system for a coal gasification device; this invention provides a measure of protection for the water wall of the gasifier, but does not allow for protection of the burner cooling system on the gasifier.
It can be seen from the above prior art that, for the existing cooling system of the water wall gasifier, the burner cooling system or the water wall system is only used independently, but not regarded as a whole; meanwhile, the energy emitted by the gasification furnace is not fully utilized by the single cooling system, and the energy utilization rate is low.
Disclosure of Invention
In view of the above, the present invention provides a cooling system for a gasification device, which solves the technical problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the cooling system for the internal circulation of the gasification device provided by the invention comprises: the system comprises a gasification furnace, a cooling water buffer tank, a steam generator and an oxygen heat exchanger;
the cooling water buffer tank is used for providing cooling water for a cooling system arranged in the gasification furnace to perform first heat exchange and obtaining cooling water I after the first heat exchange;
the steam generator is used for receiving the cooling water I and performing secondary heat exchange on the cooling water I and a material flow for generating steam to obtain cooling water II and steam after the secondary heat exchange;
the oxygen heat exchanger is used for receiving part of the cooling water II and carrying out third heat exchange with oxygen to be heated to obtain cooling water III after the third heat exchange and oxygen for supplying to a burner of the gasification furnace;
the cooling water buffer tank is also used for receiving the cooling water III and part of the cooling water II.
The cooling system provided by the invention exchanges heat in the gasification furnace through cooling water and takes out the heat, low-pressure steam is secondarily produced through the steam generator, and input oxygen is heated through the oxygen heat exchanger, so that secondary utilization of the heat in the gasification furnace is fully realized; meanwhile, the consumption of the whole system is effectively reduced.
As is well known to those skilled in the art, the reaction chamber of the gasification furnace is mainly composed of two parts, a burner for delivering reaction substances and a water wall combustion chamber for the combustion reaction of the substances, and a large amount of heat is released by the burner and the water wall combustion chamber during the reaction in the reaction chamber of the gasification furnace. In order to fully utilize the heat emitted by the burner and the water-cooled wall combustion chamber, after the research of the inventor, two sets of cooling systems are arranged in the gasification furnace, and each cooling system comprises a burner cooling channel for cooling the burner of the gasification furnace and a water-cooled wall cooling channel for cooling the combustion chamber of the gasification furnace. A cooling water outlet of the cooling water buffer tank is respectively connected with an inlet of the burner cooling channel and an inlet of the water-cooled wall cooling channel through pipelines; the outlet of the burner cooling channel and the outlet of the water wall cooling channel are connected with the inlet of the cooling water I of the steam generator through a pipeline. After the cooling water output from the cooling water buffer tank flows into the gasification furnace, the cooling water passes through the burner cooling channel and the water-cooled wall cooling channel of the combustion chamber, and then the heat in the furnace is taken out, so that the device investment and maintenance cost are reduced, and the heat recovery rate is improved; meanwhile, the damage of equipment caused by overhigh local heat in the gasification furnace is avoided.
In the invention, a cooling water circulating pump is also arranged between the cooling water buffer tank and a cooling system arranged in the gasification furnace and is used for delivering the cooling water in the cooling water buffer tank to the cooling system arranged in the gasification furnace.
In some specific embodiments, a cooling water outlet of the cooling water circulating pump is connected with a cooling system arranged in the gasification furnace through a cooling water I delivery pipeline, a flow meter and a flow orifice plate are arranged on the cooling water I delivery pipeline, and the flow meter is used for measuring the flow of the cooling water entering the cooling system of the gasification furnace; in some preferred embodiments, the flow meter is further provided with a safety interlock, and if the measured flow value of the cooling water entering the gasification furnace is reduced to a certain value, the safety interlock is triggered to stop the gasification furnace, so as to prevent the gasification furnace from being damaged due to too low flow of the cooling water and insufficient cooling.
As a preferred embodiment, the flow orifice plate on the cooling water I delivery pipeline comprises a flow orifice plate I and a flow orifice plate II, the cooling water I delivery pipeline comprises a burner pipeline communicated between the cooling water circulating pump and the inlet of the burner cooling channel and a water wall pipeline communicated between the cooling water circulating pump and the inlet of the water wall cooling channel, the flow orifice plate I is arranged on the burner pipeline, and the flow orifice plate II is arranged on the water wall pipeline. The amount of cooling water passing through the flow orifice plates I and II can be further regulated by flow meters arranged on the delivery lines of the cooling water I. The inventor researches and discovers that the cooling water flow between the burner cooling channel and the water wall cooling channel can have certain influence on the cooling efficiency, when the cooling water flow entering the burner cooling channel is controlled to be 5-10% of the cooling water flow flowing out of the water outlet of the cooling water buffer tank, and the cooling water flow entering the water wall cooling channel is controlled to be 90-95% of the cooling water flow flowing out of the water outlet of the cooling water buffer tank, the utilization rate of the cooling water can be improved to a greater extent, and the energy consumption is reduced.
The invention relates to a flow orifice plate on a cooling water I delivery pipeline, which is known in the field and is used as a throttling element for limiting the flow of cooling water. Compared with the valve used conventionally, the valve has simple structure, does not need operation and maintenance, and can effectively reduce the operating cost of the system.
The steam generator is provided with an I cooling water inlet and an II cooling water outlet, and the I cooling water inlet is connected with the I cooling water outlet of the cooling system arranged in the gasification furnace through a pipeline. The outlet of the cooling water II outputs the cooling water II through an outlet pipeline, and the cooling water II is divided into two paths: one path of cooling water II is conveyed to the cooling water buffer tank through a cooling water II conveying pipeline I; and the other path is conveyed to the oxygen heat exchanger through a cooling water II conveying pipeline. And the first cooling water II delivery pipeline is communicated with the cooling water buffer tank, and a flow control valve is arranged on the first cooling water II delivery pipeline and is used for controlling the amount of cooling water directly returned to the cooling water buffer tank by the steam generator.
The oxygen heat exchanger is provided with an oxygen outlet, an oxygen inlet, a cooling water II inlet and a cooling water III outlet; the oxygen inlet is communicated with external oxygen to be heated, the oxygen outlet is connected with the burner of the gasification furnace through a pipeline, and a thermometer for detecting the temperature of the oxygen in the pipeline is arranged on the pipeline; and the cooling water II inlet is communicated with the cooling water II outlet of the steam generator through a cooling water II conveying pipeline II, the cooling water II is subjected to heat exchange through the oxygen heat exchanger to obtain cooling water III, and the cooling water III flows out from the cooling water III outlet and then returns to the cooling water buffer tank through a cooling water III conveying pipeline.
Specifically, after cooling water I exchanges heat through a steam generator, generated cooling water II is divided into two paths: a part of cooling water II is directly returned to the cooling water buffer tank through a cooling water II delivery pipeline I to form a closed internal circulation of the system, an outlet of the cooling water II is connected with the cooling water buffer tank through the cooling water II delivery pipeline I, and the cooling water II delivery pipeline I is provided with a flow control valve for adjusting the flow of the cooling water directly returned to the cooling water buffer tank from the steam generator; compared with the conventional steam heating method, the cooling water of the gasification furnace can effectively reduce the problem of easy leakage in the steam using process, and the steam condensate is not required to be discharged outside, thereby reducing the consumption of the device. Because the cooling water of the gasification furnace is always in a single-phase state, the problem that the steam is not preheated enough and is easy to condense to generate water hammer in the use process is not needed to be considered in the use process, the operation is simpler and more convenient, and the reliability of the device is further improved;
the other part of the cooling water II is conveyed to a cooling water II inlet of the oxygen heat exchanger through a cooling water II conveying pipeline II so as to exchange heat and cool again, and an oxygen outlet of the oxygen heat exchanger is connected with a burner of the gasification furnace through a pipeline; the III exports of cooling water of oxygen heat exchanger are connected to the cooling water buffer tank through III pipeline of cooling water, still be provided with the temperature control valve on the III pipeline of cooling water for adjust the flow that gets into the cooling water III in the oxygen heat exchanger. After heat exchange of the oxygen heat exchanger, heat brought by cooling water I of the gasification furnace can be utilized by 100%.
In some preferred embodiments, a temperature control module is further disposed on the oxygen heat exchanger, and the temperature control module is in communication connection with the thermometer, the temperature control valve and the flow control valve. Specifically, a thermometer on the oxygen heat exchanger detects the temperature of oxygen in a pipeline between an oxygen outlet of the oxygen heat exchanger and a burner of the gasification furnace, transmits an oxygen temperature signal to a temperature control module, and sends a signal for increasing the flow of cooling water III in a cooling water III conveying pipeline to a temperature control valve after the oxygen temperature signal is analyzed by the temperature control module, namely, the flow of cooling water II flowing into the oxygen heat exchanger is increased; meanwhile, the temperature control module can correspondingly send a signal for reducing the flow rate of the cooling water II directly flowing back to the cooling water buffer tank to the flow control valve; or after being analyzed by the temperature control module, sending a signal for reducing the flow of the cooling water III in the cooling water III conveying pipeline to the temperature control valve, namely, sending a signal for reducing the flow of the cooling water II flowing into the oxygen heat exchanger; meanwhile, the temperature control module can correspondingly send a signal for increasing the flow of the cooling water II flowing back to the cooling water buffer tank to the flow control valve; for example, if the temperature of the oxygen measured by the thermometer is too high, the signal is transmitted to the temperature control module, and the signal for reducing the flow rate of the cooling water II flowing into the oxygen heat exchanger is transmitted to the temperature control valve after being analyzed, then the temperature control valve is closed to limit the water amount of the cooling water II entering the oxygen heat exchanger; meanwhile, the flow control valve is opened greatly to increase the flow of the cooling water II directly sent back to the cooling water buffer tank through the cooling water II delivery pipeline.
In the invention, a pressure gauge, an inflation inlet for filling gas into the cooling water buffer tank and a deflation outlet for discharging the gas in the cooling water buffer tank are arranged on the cooling water buffer tank, the inflation inlet is communicated with a pressurization pipeline, and the deflation outlet is communicated with a deflation pipeline; further preferably, a first pressure control valve for opening or closing the charging pipeline is further arranged on the charging pipeline, and a second pressure control valve for opening or closing the emptying pipeline is further arranged on the emptying pipeline.
In some preferred embodiments, a pressure control module is further disposed on the cooling water buffer tank, and the pressure control module is communicatively connected with the pressure gauge, the first pressure control valve and the second pressure control valve. Specifically, a pressure gauge on the cooling water buffer tank sends a pressure signal to the pressure control module, and after the pressure signal is analyzed, the pressure control module sends an opening or closing signal to the first pressure control valve and the second pressure control valve. For example, if the pressure in the cooling water buffer tank is too high, the signal is transmitted to the pressure control module for analysis, then the signal for closing the first pressure control valve is transmitted to the first pressure valve and the signal for opening the second pressure control valve is transmitted to the second pressure control valve, and then the cooling water buffer tank is connected with the emptying pipeline to reduce the pressure in the cooling water buffer tank and maintain the pressure stable; and vice versa.
In the invention, a water replenishing port for replenishing water into the cooling water buffer tank and a liquid level meter for measuring the amount of cooling water in the cooling water buffer tank are arranged on the cooling water buffer tank, and the water replenishing port is connected with a water replenishing pipeline; the water replenishing pipeline is also provided with a cut-off valve for opening or closing.
In some preferred embodiments, a liquid level control module is further arranged on the cooling water buffer tank, and the liquid level control module is in communication connection with the liquid level meter and the stop valve. Specifically, a liquid level meter on the cooling water buffer tank sends a liquid level signal to a liquid level control module, and the liquid level signal is analyzed and then sent to a cut-off valve to be opened or closed. For example, if the liquid level in the cooling water buffer tank reaches the predetermined liquid level, the signal is transmitted to the liquid level control module for analysis, and then the closed signal is transmitted to the cut-off valve to maintain the liquid level in the cooling water buffer tank; and vice versa.
The cooling water buffer tank is arranged above the gasification furnace, the pressure in the cooling water buffer tank is maintained through inert gas, the pressure difference between the cooling water buffer tank and the gasification furnace is maintained within the range of 0.5-1.0MPa, and the pressure difference can ensure that synthetic gas in the gasification furnace can not be caused to flow into a cooling water pipeline when equipment leaks, so that the operation safety of a system is endangered; meanwhile, the gravity difference between the cooling water circulation pump and the gasification furnace can ensure that the cooling water can still flow in a short time under the condition of the fault of the cooling water circulation pump, so that time is created for accident handling, and the damage to equipment caused by the fault of the pump is avoided. In some preferred embodiments, the height difference between the cooling water buffer tank and the gasification furnace is 10 to 20m, and the above range is further preferred according to the flow rate of cooling water in the system.
By adopting the technical scheme, the method has the following technical effects:
the cooling system of the invention combines the gasifier burner cooling system and the gasifier water-cooled wall cooling system into one cooling system, thereby reducing the equipment quantity and the device investment and maintenance cost. Compared with other single systems, the invention has simple operation and reliable device operation, and fully considers the uniformity of the operation pressure of the closed circulation system.
The cooling system has high heat recovery rate and high energy utilization rate, reduces the discharge of the device and reduces the consumption. The heat taken away by the cooling water from the water-cooled wall firstly passes through the heat exchanger to produce steam as a byproduct, and then is heated by the oxygen heat exchanger, so that the secondary utilization of energy is fully realized.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
the system comprises a gasification furnace 1, a gasification furnace 2, a cooling water buffer tank 3, a steam generator 4, an oxygen heat exchanger 5, a burner 6, a flowmeter 7, a cooling water circulating pump 8, flow pore plates I and 9, flow pore plates II and 10, flow control valves 11, a stop valve 12, a first pressure control valve 13, a second pressure control valve 14, a temperature control valve 15, a burner pipeline 16, a water wall pipeline 17, a cooling water II delivery pipeline I and 18, a cooling water II delivery pipeline II and 19 and a cooling water III delivery pipeline.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description of the invention:
as shown in fig. 1, a cooling system circulating in a gasification apparatus includes: the system comprises a gasification furnace 1, a cooling water buffer tank 2, a steam generator 3 and an oxygen heat exchanger 4; the cooling water buffer tank 2 is used for providing cooling water for a cooling system arranged in the gasification furnace 1 to perform heat exchange, and obtaining cooling water I after the first heat exchange. Cooling water I enters from a cooling water I inlet of the steam generator 3 and carries out secondary heat exchange with material flow used for generating steam to generate steam and obtain cooling water II after the secondary heat exchange, and the generated steam can be reused; the generated cooling water II is output from an outlet pipeline and is divided into two paths: firstly, a part of cooling water II flows out from a cooling water II outlet and is directly returned to the cooling water buffer tank 2 through a cooling water II delivery pipeline I17 to form a closed internal circulation of the system, and a flow control valve 10 is arranged on the cooling water II delivery pipeline I17 and is used for adjusting the flow of the cooling water II which directly flows into the cooling water buffer tank 2 through the steam generator 3;
secondly, after flowing out of the cooling water II outlet, the other part of cooling water II is conveyed to the oxygen heat exchanger 4 through a cooling water II conveying pipeline II 18 to carry out third heat exchange with oxygen to be heated, and the oxygen after heat exchange enters the burner 5 of the gasification furnace 1 from the oxygen outlet of the oxygen heat exchanger 4 through a pipeline to carry out subsequent reaction; the cooling water III after heat exchange returns to the cooling water buffer tank 2 through a cooling water III conveying pipeline 19 between a cooling water III outlet of the oxygen heat exchanger 4 and the cooling water buffer tank 2. The cooling water iii delivery line 19 is also provided with a temperature control valve 14 for regulating the flow of cooling water iii into the oxygen heat exchanger 4. After passing through the oxygen heat exchanger 4, the cooling water can use 100% of the heat brought out from the gasification furnace 1 for heat exchange utilization.
The cooling water buffer tank 2 is provided with a pressure gauge, an inflation inlet for inflating gas into the cooling water buffer tank 2 and a deflation outlet for discharging the gas in the cooling water buffer tank 2, the inflation inlet is communicated with a pressurization pipeline, and the deflation outlet is communicated with a deflation pipeline; further preferably, a first pressure control valve 12 for opening or closing the charging line is further provided on the charging line, and a second pressure control valve 13 for opening or closing the emptying line is further provided on the emptying line.
In some preferred embodiments, the cooling water buffer tank 2 is further provided with a pressure control module, and the pressure control module is connected with a pressure gauge, the first pressure control valve 12 and the second pressure control valve 13 in a communication mode. Specifically, the pressure gauge on the cooling water buffer tank 2 sends a pressure signal to the pressure control module, which analyzes the pressure signal and sends an open or closed signal to the first pressure control valve 12 and the second pressure control valve 13. For example, if the pressure in the cooling water buffer tank 2 is too high, the signal is transmitted to the pressure control module for analysis, the signal for closing the first pressure valve 12 is transmitted to the first pressure valve 12, and the signal for opening the second pressure control valve 13 is transmitted to the second pressure control valve 13, and then the cooling water buffer tank 2 is connected to the vent line to reduce the pressure inside the cooling water buffer tank 2 and maintain the pressure stable; and vice versa.
In the invention, a water replenishing port for replenishing water into the cooling water buffer tank 2 and a liquid level meter for measuring the amount of cooling water in the cooling water buffer tank 2 are arranged on the cooling water buffer tank 2, and the water replenishing port is connected with a water replenishing pipeline; the water supply pipeline is also provided with a cut-off valve 11 for opening or closing.
In some preferred embodiments, a liquid level control module is further disposed on the cooling water buffer tank 2, and the liquid level control module is in communication connection with the liquid level meter and the cut-off valve 11. Specifically, the level gauge on the cooling water buffer tank 2 sends a liquid level signal to the liquid level control module, and after analysis, the liquid level gauge sends an open or closed signal to the cut-off valve 11. For example, if the liquid level in the cooling water buffer tank 2 reaches the preset liquid level, the signal is transmitted to the liquid level control module for analysis, and then the closed signal is transmitted to the cut-off valve 11, so as to maintain the liquid level inside the cooling water buffer tank 2 and maintain the pressure stable; and vice versa.
A cooling water circulating pump 7 is further arranged between the cooling water buffer tank 2 and the cooling system arranged in the gasification furnace 1 and used for delivering the cooling water in the cooling water buffer tank 2 to the cooling system arranged in the gasification furnace 1. And a cooling water outlet of the cooling water circulating pump 7 is connected with a cooling system arranged in the gasification furnace 1 through a cooling water I delivery pipeline, and a flowmeter 6 and a flow orifice plate are arranged in the cooling water I delivery pipeline.
In some preferred embodiments, the flow orifice plate comprises a flow orifice plate I8 and a flow orifice plate II9, the cooling water I delivery line comprises a burner line 15 communicating between the cooling water circulation pump 7 and the inlet of the burner cooling channel and a water wall line 16 communicating between the cooling water circulation pump 7 and the inlet of the water wall cooling channel, the flow orifice plate I8 is disposed on the burner line 15, and the flow orifice plate II9 is disposed on the water wall line 16. The cooling water flow between the burner cooling channel and the water wall cooling channel has certain influence on the cooling efficiency, and when the cooling water flow entering the burner cooling channel is controlled to be 5-10% of the cooling water flow flowing out of the water outlet of the cooling water buffer tank 2, and the cooling water flow entering the water wall cooling channel is controlled to be 90-95% of the cooling water flow flowing out of the water outlet of the cooling water buffer tank 2, the energy in the gasification furnace 1 can be recycled to a greater degree.
The steam generator 3 is respectively provided with a cooling water I inlet and a cooling water II outlet, the cooling water I inlet is connected with the cooling water I outlet of a cooling system arranged in the gasification furnace 1 through a pipeline, and meanwhile; the oxygen heat exchanger 4 is provided with an oxygen outlet, an oxygen inlet, a cooling water II inlet and a cooling water III outlet; the oxygen outlet is communicated with the burner 5 of the gasification furnace 1 through a pipeline, and a thermometer for detecting the temperature of the oxygen entering the burner 5 is arranged on the pipeline and is used for detecting whether the oxygen after heat exchange of the oxygen heat exchanger 4 achieves the preheating effect or not; the outlet of the cooling water III of the oxygen heat exchanger 4 is connected with the cooling water buffer tank 2 through a cooling water III conveying pipeline 19, and a temperature control valve 14 is further arranged on the pipeline.
In some preferred embodiments, a temperature control module is further disposed on the oxygen heat exchanger 4, and the temperature control module is in communication with a thermometer, the temperature control valve 14 and the flow control valve 10. Specifically, a thermometer on the oxygen heat exchanger 4 transmits an oxygen temperature signal in the burner 5 to a temperature control module, and the temperature control module analyzes the oxygen temperature signal and transmits the signal of the temperature control signal to a temperature control valve 14; for example, if the temperature of the oxygen measured by the thermometer is too high, that is, the temperature of the oxygen entering the burner 5 is too high, the signal is transmitted to the temperature control module and analyzed, and then the temperature control module reduces the amount of the cooling water ii flowing through the temperature control valve 14, and increases the amount of the cooling water ii flowing through the flow control valve 10 to reduce the temperature of the oxygen exchanging heat through the oxygen heat exchanger 4; if the temperature of the oxygen measured by the thermometer is too low, that is, the temperature of the oxygen entering the burner 5 is too low, the signal is transmitted to the temperature control module and analyzed, and then the temperature control module increases the amount of the cooling water ii flowing through the temperature control valve 14, and simultaneously reduces the amount of the cooling water ii flowing through the flow control valve 10, so as to increase the temperature of the oxygen exchanging heat through the oxygen heat exchanger 4.
In some preferred embodiments, the cooling water buffer tank 2 is arranged above the gasification furnace 1, the pressure in the cooling water buffer tank 2 is maintained through inert gas, and the differential pressure between the cooling water buffer tank 2 and the gasification furnace 1 is maintained within the range of 0.5-1.0MPa, so that the differential pressure can ensure that when equipment leaks, the synthetic gas in the gasification furnace 1 can not be caused to flow into a cooling water pipeline, and the operation safety of the system is endangered; meanwhile, the gravity difference between the cooling water circulation pump and the gasification furnace 1 can ensure that the cooling water can still flow in a short time under the condition of the fault of the cooling water circulation pump 7, so that time is created for accident handling, and the damage to equipment caused by the fault of the cooling water circulation pump 7 is avoided. In some preferred embodiments, the height difference between the cooling water buffer tank 2 and the gasification furnace 1 is any value within a range of 10 to 20m, and is further preferably within the above range according to the flow rate of cooling water in the system.
In a specific embodiment, the set of pulverized coal pressurized gasifier 1 with a daily throughput of 2000 tons has an operating temperature of 1600 ℃ and an operating pressure of 4.0MPaG for the gasifier 1. The operation pressure of the cooling water buffer tank 2 is 5.0MPaG, the outlet flow of the cooling water circulating pump 7 is 238t/h, the temperature of the cooling water is 193 ℃, the flow of the cooling water entering the cooling channel of the gasifier burner 5 is 9t/h, and the flow of the cooling water entering the cooling channel of the gasifier water-cooled wall is 229 t/h. The temperature of the cooling water outlet of the gasification furnace 1 is 220 ℃, and 0.5Mpa low-pressure steam is generated for about 10t after entering the steam generator 3. After the cooling water comes out of the steam generator 3, the temperature is reduced to 200 ℃. The cooling water entering the oxygen heater 4 is about 37t/h, and the oxygen entering the oxygen heater 4 is heated to 180 ℃ from 20 ℃; the cooling water from the oxygen heater 4 is mixed with the bypass cooling water and then enters the cooling water buffer tank 2, and the temperature is 193 ℃. The investment of the whole device is saved by about 150 ten thousand yuan compared with other designs.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A system for circulating cooling within a gasification apparatus, the cooling system comprising: the system comprises a gasification furnace (1), a cooling water buffer tank (2), a steam generator (3) and an oxygen heat exchanger (4);
the cooling water buffer tank (2) is used for providing cooling water for a cooling system arranged in the gasification furnace (1) to perform first heat exchange and obtaining cooling water I after the first heat exchange;
the steam generator (3) is used for receiving the cooling water I and performing secondary heat exchange on the cooling water I and the material flow used for generating steam to obtain cooling water II and steam after the secondary heat exchange;
the oxygen heat exchanger (4) is used for receiving part of the cooling water II and carrying out third heat exchange with oxygen to be heated to obtain cooling water III after the third heat exchange and oxygen for supplying to a burner (5) of the gasification furnace (1);
the cooling water buffer tank (2) is also used for receiving the cooling water III and part of the cooling water II;
a cooling water II inlet and a cooling water III outlet are formed in the oxygen heat exchanger (4), the cooling water II inlet is communicated with the cooling water II outlet of the steam generator (3) through a cooling water II conveying pipeline II (18), and the cooling water III outlet is connected to the cooling water buffer tank (2) through a cooling water III conveying pipeline (19);
the oxygen heat exchanger (4) is provided with an oxygen outlet and an oxygen inlet;
an oxygen outlet of the oxygen heat exchanger (4) is connected with a burner (5) of the gasification furnace (1) through a pipeline, and a thermometer for detecting the temperature of oxygen in the pipeline is arranged on the pipeline;
a temperature control valve (14) is also arranged on the cooling water III conveying pipeline (19);
the steam generator (3) is provided with a cooling water I inlet and a cooling water II outlet, and the cooling water I inlet is connected with a cooling water I outlet of a cooling system arranged in the gasification furnace (1) through a pipeline; the outlet of the cooling water II is communicated with the cooling water buffer tank (2) through a cooling water II delivery pipeline I (17), and a flow control valve (10) is arranged on the cooling water II delivery pipeline I (17);
the oxygen heat exchanger (4) is also provided with a temperature control module, and the temperature control module is in communication connection with the thermometer, the temperature control valve (14) and the flow control valve (10).
2. The system according to claim 1, wherein the cooling system provided in the gasification furnace (1) comprises a burner cooling channel for cooling the burner (5) of the gasification furnace (1) and a water wall cooling channel for cooling the combustion chamber of the gasification furnace (1);
a cooling water outlet of the cooling water buffer tank (2) is respectively connected with an inlet of the burner cooling channel and an inlet of the water-cooled wall cooling channel through pipelines;
and the outlet of the burner cooling channel and the outlet of the water wall cooling channel are connected with the inlet of the cooling water I of the steam generator (3) through a pipeline.
3. The system according to claim 2, characterized in that a cooling water circulating pump (7) is further disposed between the cooling water buffer tank (2) and the cooling system disposed in the gasification furnace (1) for delivering the cooling water in the cooling water buffer tank (2) to the cooling system disposed in the gasification furnace (1).
4. The system according to claim 3, wherein the cooling water outlet of the cooling water circulation pump (7) is connected with the cooling system arranged in the gasification furnace (1) through a cooling water I delivery pipeline, and a flow meter (6) and a flow orifice plate are arranged on the cooling water I delivery pipeline.
5. The system of claim 4, wherein the flow orifice plate comprises a flow orifice plate I (8) and a flow orifice plate II (9), the cooling water I delivery line comprises a burner line (15) communicating between the cooling water circulation pump (7) and the inlet of the burner cooling channel and a water wall line (16) communicating between the cooling water circulation pump (7) and the inlet of the water wall cooling channel, the flow orifice plate I (8) is arranged on the burner line (15), and the flow orifice plate II (9) is arranged on the water wall line (16).
6. The system according to any one of claims 1, 2, 4 and 5, characterized in that the cooling water buffer tank (2) is provided with a pressure gauge, an inflation inlet for inflating gas into the cooling water buffer tank (2), and a deflation outlet for discharging gas from the cooling water buffer tank (2), wherein the inflation inlet is communicated with a inflation pipeline, and the deflation outlet is communicated with a deflation pipeline;
the charging pipeline is also provided with a first pressure control valve (12) for opening or closing the charging pipeline, and the emptying pipeline is also provided with a second pressure control valve (13) for opening or closing the emptying pipeline.
7. The system according to claim 6, characterized in that a pressure control module is also arranged on the cooling water buffer tank (2), and the pressure control module is connected with the pressure gauge, the first pressure control valve (12) and the second pressure control valve (13) in a communication way.
8. The system according to claim 6, characterized in that the cooling water buffer tank (2) is provided with a water replenishing port for replenishing water into the cooling water buffer tank (2) and a liquid level meter for measuring the amount of cooling water in the cooling water buffer tank (2), wherein the water replenishing port is connected with a water replenishing pipeline;
the water replenishing pipeline is also provided with a shut-off valve (11) for opening or closing the water replenishing pipeline;
still be provided with liquid level control module on cooling water buffer tank (2), liquid level control module with the level gauge with communication connection between trip valve (11).
9. The system according to any one of claims 1, 2, 4, 5, 7, 8, wherein the cooling water buffer tank (2) is disposed above the gasification furnace (1).
10. The system according to claim 9, wherein the difference in height between the cooling water buffer tank (2) and the gasifier (1) is 10-20 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910013970.8A CN109852425B (en) | 2019-01-08 | 2019-01-08 | Gasification device internal circulation cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910013970.8A CN109852425B (en) | 2019-01-08 | 2019-01-08 | Gasification device internal circulation cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109852425A CN109852425A (en) | 2019-06-07 |
| CN109852425B true CN109852425B (en) | 2020-11-13 |
Family
ID=66894101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910013970.8A Active CN109852425B (en) | 2019-01-08 | 2019-01-08 | Gasification device internal circulation cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109852425B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111004648B (en) * | 2019-11-22 | 2021-09-21 | 唐山科源环保技术装备有限公司 | Method for preheating air gasifying agent by using waste heat of gas producer |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1764746A (en) * | 1927-05-07 | 1930-06-17 | James N Paff | Water-cooled air and steam nozzle for gas generators |
| SE531101C2 (en) * | 2006-12-14 | 2008-12-16 | Rolf Ljunggren | Process and plant for producing synthesis gas from biomass |
| DE102008036058B4 (en) * | 2008-08-01 | 2013-04-18 | Linde Ag | Method and device for starting up combustible gasification reactors |
| CN202730087U (en) * | 2012-09-05 | 2013-02-13 | 华陆工程科技有限责任公司 | Water cooled wall type water coal slurry gasifier |
| CN203360398U (en) * | 2013-07-26 | 2013-12-25 | 厦门大学 | Biomass gasification and power generation device adopting downward circulating fluidized bed |
| CN205603539U (en) * | 2016-03-24 | 2016-09-28 | 成都高科达科技有限公司 | A gasifier water -cooling wall circulating water system for coal gasifier |
| CN206219524U (en) * | 2016-11-25 | 2017-06-06 | 北京华福工程有限公司 | Pot destroying process hydrocarbon gas combine coal gasification preparing synthetic gas apparatus and system |
| CN206646074U (en) * | 2017-03-16 | 2017-11-17 | 广东正鹏生物质能源科技有限公司 | A kind of gasification of biomass cooling residual heat utilizes system |
| CN108329952A (en) * | 2018-02-22 | 2018-07-27 | 北京瑞达科博技术有限公司 | Industrial effluent reusing coal gasifier and gasification process |
| CN108753370B (en) * | 2018-08-22 | 2024-03-29 | 安徽科达洁能股份有限公司 | Coupled coal gasification system and method |
-
2019
- 2019-01-08 CN CN201910013970.8A patent/CN109852425B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| GSP气化炉水冷壁系统的应用优化;侯茂林;《价值工程》;20161218(第35期);第133-134页 * |
| 煤气化技术现状及发展趋势;陈峰;《合作经济与科技》;20121231(第24期);第125-126页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109852425A (en) | 2019-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106594517A (en) | Direct gasification system for liquid ammonia and gasification process for direct gasification system | |
| CN109852425B (en) | Gasification device internal circulation cooling system | |
| CN208859329U (en) | The check system of gas distributing device and jet chimney leak detection system | |
| CN103842624A (en) | Gasification reactor | |
| CN219526556U (en) | BGL gasifier nitrogen gas feed system | |
| US10502489B2 (en) | Coal slurry preheater and coal gasification system and method using the same | |
| CN106810062B (en) | Device and method for improving tin wiping and sealing performance of float glass transition roller table | |
| CN107090314B (en) | Cooling method and cooling system of gasification burner | |
| CN201331085Y (en) | Independent adjusting device of gas and combustion-supporting air for burner nozzle of annular sleeve kiln | |
| CN115094179B (en) | System and method for recycling waste gas generated during furnace changing of hot blast stove | |
| CN109487025A (en) | A kind of furnace roof nitrogen system | |
| CN215440517U (en) | System for hydrogen-rich gas preparation is used for blast furnace jetting | |
| CN205473862U (en) | Hot -blast furnace coal gas turbocharging system | |
| CN201778043U (en) | Coal gas blowing device of blast furnace | |
| CN110791307B (en) | Energy-saving temperature-control heat exchange system for methanol-to-oil | |
| CN111690442A (en) | Pulverized coal flow control method | |
| CN206828459U (en) | Gasification system and monitoring system | |
| CN110873335A (en) | Heat transfer system and adjustment control method thereof | |
| CN217952258U (en) | Balanced energy-saving process system of boiler water supply system | |
| CN220265631U (en) | Powder coke blending and burning equipment of pulverized coal gasification furnace | |
| CN211450986U (en) | Heat transfer system | |
| CN210646316U (en) | Gas reaction system | |
| KR101436600B1 (en) | Steam generator and generating method thereof | |
| CN218033112U (en) | Dry quenching deoxidization water supply installation and dry quenching system | |
| CN113551220B (en) | Based on boiler waste heat recovery utilizes system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 100004 room 3807, 38 / F, building 1, 6 Xinyuan South Road, Chaoyang District, Beijing Patentee after: Colin energy technology (Beijing) Co.,Ltd. Address before: Room 4110, Jingcheng building, 6 Xinyuan South Road, Chaoyang District, Beijing Patentee before: CHOREN FUTURE ENERGY TECHNOLOGY (BEIJING) Co.,Ltd. |
|
| CP03 | Change of name, title or address |