Gasification oven feeding integrated device and control method thereof

Abstract

The invention provides a gasification, baking and feeding integrated device and a control method thereof. The device comprises a gasification furnace and an integrated burner, a gasification chamber is arranged in the gasification furnace, a first end of the gasification furnace is provided with a feeding port, the feeding port is communicated with the gasification chamber, the integrated burner is connected with the first end of the gasification furnace, and the integrated burner seals the feeding port; the integrated burner is provided with an ignition channel, an oxidizing agent channel and a fuel channel, the ignition channel, the oxidizing agent channel and the fuel channel are communicated with the feeding port, and the fuel channel is used for introducing starting fuel gas or fuel raw materials into the gasification chamber. According to the integrated burner, the ignition channel, the oxidizing agent channel and the fuel channel are formed in the integrated burner, ignition, furnace baking and feeding can be achieved through the integrated burner, in the working process, the burner does not need to be replaced, the field workload is saved, and the operation safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of gasification furnaces and coal feeding, and in particular to a gasification furnace, a coal feeding device and a control method thereof. Background Art

[0002] Water-coal slurry gasification usually uses a preheating burner to heat the gasifier. After the gasifier temperature rises to more than 1200℃, it is replaced with a process burner for feeding. In the project of replacing the preheating burner with the process burner, if the replacement time is too long, the furnace temperature will drop to below 800℃, which may cause the gasifier to fail to feed. In addition, the switching of the preheating burner and the process burner under high temperature conditions is extremely high, the workload of on-site operation is large, and the degree of danger is high.

[0003] At present, although there are integrated water-coal slurry process burners for ignition and baking furnaces, the ignition failure rate is high during actual use, and there is a problem of severe ablation of the process burner head during the baking process, which greatly affects the working performance and service life of the water-coal slurry burner. Summary of the invention

[0004] Based on this, it is necessary to provide a gasification furnace feeding integrated device and a control method thereof to address the above technical problems.

[0005] A gasification furnace feeding integrated device, comprising: a gasification furnace and an integrated burner;

[0006] A gasification chamber is provided in the gasification furnace, a first end of the gasification furnace has a feeding port, the feeding port is communicated with the gasification chamber, the integrated burner is connected to the first end of the gasification furnace, and the integrated burner closes the feeding port;

[0007] The integrated burner is provided with an ignition channel, an oxidant channel and a fuel channel. The ignition channel, the oxidant channel and the fuel channel are respectively connected to the feeding port. The fuel channel is used to introduce start-up fuel gas or fuel raw materials into the gasification chamber.

[0008] In one embodiment, the integrated burner has 2n+1 channels, and each of the channels is arranged from inside to outside along the axial direction.

[0009] In one of the embodiments, the channel located at the center of the integrated burner is the ignition channel, and the oxidant channel and the fuel channel are arranged axially from inside to outside.

[0010] In one of the embodiments, it further includes a first nitrogen delivery pipe, on which a nitrogen valve is provided, and the first nitrogen delivery pipe is connected to the ignition channel.

[0011] In one embodiment, it also includes a fuel gas delivery pipe and an ignition air delivery pipe, the fuel gas delivery pipe is connected to the ignition channel and the fuel channel, the ignition air delivery pipe is connected to the ignition channel, the fuel gas delivery pipe is provided with an ignition fuel valve, and the ignition air delivery pipe is provided with an ignition air valve.

[0012] In one of the embodiments, the fuel gas delivery pipe includes an ignition delivery branch pipe and a start-up delivery branch pipe, the ignition delivery branch pipe is connected to the ignition channel, and the start-up delivery branch pipe is connected to the fuel channel.

[0013] In one of the embodiments, an oxygen delivery tube is further included, wherein the oxygen delivery tube is connected to the oxidant channel and an oxygen valve is disposed on the oxygen delivery tube.

[0014] In one of the embodiments, it further comprises a fuel raw material delivery pipe, the fuel raw material delivery pipe is connected to the fuel channel, and a fuel valve is disposed on the fuel raw material delivery pipe.

[0015] A control method for a gasification and drying furnace integrated feeding device is applied to the gasification and drying furnace integrated feeding device described in any of the above embodiments, and is characterized by comprising:

[0016] In the ignition stage, the ignition channel is opened, the ignition fuel gas and factory air are delivered to the ignition channel of the integrated burner, and the ignition gun is started to ignite the ignition fuel gas in the ignition channel of the integrated burner;

[0017] During the start-up and baking stage, the fuel channel is opened, the start-up fuel gas is delivered to the fuel channel, and oxygen is delivered to the oxidant channel;

[0018] Detecting whether the ignition of the start-up drying furnace is successful, and when it is detected that the ignition of the start-up drying furnace is successful, stopping the supply of ignition fuel gas and factory air to the ignition channel;

[0019] In the coal feeding stage, fuel raw materials are fed into the gasifier through the fuel channel, and oxidant is fed into the gasifier through the oxidant channel.

[0020] In one embodiment, the step of detecting whether the ignition of the start-up kiln is successful, and when the ignition of the start-up kiln is successful, stopping the delivery of the ignition fuel gas to the ignition channel comprises:

[0021] Check whether the start-up kiln ignition is successful. When the start-up kiln ignition is successful, close the first shut-off valve and the second shut-off valve of the ignition delivery branch pipe, and nitrogen plug the first shut-off valve and the second shut-off valve of the channel for delivering the ignition fuel gas. The nitrogen plug is formed by high-pressure nitrogen to isolate the fuel gas and the gasifier synthesis gas.

[0022] The above-mentioned integrated device for feeding the gasification furnace can realize ignition, furnace baking and coal feeding by providing an ignition channel, an oxidant channel and a fuel channel in the integrated burner, so that there is no need to replace the burner during operation, which saves on-site workload and improves the safety of operation. In addition, the outer coal slurry channel of the fuel channel of the integrated burner can be used to feed both start-up fuel gas and coal slurry. The start-up fuel gas is fed through the outer coal slurry channel of the original fuel channel, and there is no need to set up a separate start-up fuel gas channel, making the design of the integrated burner more concise. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of a gasification and drying furnace feeding integrated device in one embodiment;

[0024] Figure 2 It is a schematic flow chart of a control method of a gasification and drying furnace feeding integrated device in one embodiment;

[0025] Figure 3 is a schematic diagram of the end cross-sectional structure of an integrated burner in one embodiment;

[0026] Figure 4 It is a schematic diagram of the structure of an integrated burner in one direction in an embodiment. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] Embodiment 1

[0029] In this embodiment, Figure 1 As shown, a gasification furnace feeding integrated device is provided, which includes: a gasifier 100 and an integrated burner 200; a gasification chamber 101 is arranged in the gasifier, and a first end of the gasifier has a feeding port 102, and the feeding port 102 is connected to the gasification chamber 101, and the integrated burner 200 is connected to the first end of the gasifier 100, and the integrated burner 200 closes the feeding port 102; the integrated burner is provided with an ignition channel, an oxidant channel and a fuel channel, and the ignition channel, the oxidant channel and the fuel channel are respectively connected to the feeding port, and the fuel channel is used to introduce start-up fuel gas or fuel raw materials into the gasification chamber.

[0030] Please combine Figure 1 and Figure 4On the integrated burner 200, N8 and N9 are two inlets of the ignition channel, N3 and N4 are two inlets of the oxidant channel, N1 and N2 are the inlets of the fuel channel, and N5 and N6 are the inlets and outlets of the cooling water channel.

[0031] In this embodiment, the ignition channel is used to transport ignition fuel gas and air to the gasification chamber in the gasifier, wherein the ignition fuel gas can be natural gas, refinery dry gas, liquefied petroleum gas, and the air is factory air; the oxidant channel is used to transport the oxidant to the gasification chamber, and the oxidant can be pure oxygen, oxygen-enriched air, or factory air; the fuel channel is used to transport fuel raw materials to the gasification chamber, and the fuel raw materials can be pulverized coal, water-coal slurry, oil sludge, petroleum coke, natural gas, refinery dry gas, or liquefied petroleum gas. In the following embodiments, natural gas is used as the ignition fuel gas, oxygen is used as the oxidant, and coal slurry is used as the fuel raw material for further explanation. Correspondingly, the inner fuel channel and the outer fuel channel included in the fuel channel can also be referred to as the inner coal slurry channel and the outer coal slurry channel.

[0032] In the above embodiment, by providing an ignition channel, an oxidant channel and a fuel channel in the integrated burner, the integrated burner can realize ignition, furnace baking and coal feeding, so that during the working process, there is no need to replace the burner, which saves on-site workload and improves the safety of operation. In addition, the outer coal slurry channel of the fuel channel of the integrated burner can be used to feed both start-up fuel gas and coal slurry. The start-up fuel gas is fed through the outer coal slurry channel of the original fuel channel, and there is no need to open a fuel gas channel separately, making the integrated burner design more concise.

[0033] In one embodiment, Figure 3 As shown, the end of the integrated burner has 2n+1 channels, and each of the channels is arranged axially from the inside to the outside. The channel located in the center of the integrated burner is the ignition channel, and the oxidant channel and the fuel channel are arranged axially from the inside to the outside. In this embodiment, the integrated burner has 2n+1 channels, which are the first channel to the 2n+1th channel from the inside to the outside in the axial direction, preferably 2≤n≤6. The most central channel is the ignition channel, which is passed with fuel gas and air for ignition, and the oxidant channel and the fuel channel are arranged around the ignition channel. In some embodiments, the even-numbered channels from the inside to the outside in the axial direction are oxidant channels, and the odd-numbered channels are fuel channels. In other embodiments, the odd-numbered channels from the inside to the outside in the axial direction are oxidant channels, and the even-numbered channels are fuel channels. For example, Figure 3As shown, an ignition channel is arranged at the center of the end of the integrated burner, an igniter 201 is arranged in the ignition channel, a central oxygen channel 202 is arranged around the central igniter 201, the fuel channel includes an inner coal slurry channel 204 and an outer coal slurry channel 205, and the outer sides of the central oxygen channel 202 are the inner coal slurry channel 204, the oxidant channel 203, and the outer coal slurry channel 205 in sequence, wherein the inner coal slurry channel is used to introduce coal slurry, and the outer coal slurry channel is used to introduce coal slurry or natural gas. As a fuel channel, the outer coal slurry channel can be used to introduce coal slurry or natural gas, so that one channel can be reused, making the structure of the integrated burner more streamlined.

[0034] In one embodiment, the integrated feeding device for the gasification furnace further includes a first nitrogen delivery pipe, on which a nitrogen valve is provided, and the first nitrogen delivery pipe is connected to the ignition channel. The first nitrogen delivery pipe is used to deliver nitrogen. In this embodiment, when the delivery of the ignition fuel gas is stopped, the nitrogen valve is opened to block the ignition fuel gas with nitrogen, thereby achieving nitrogen plugging of the ignition fuel gas to prevent the fuel gas from entering the gasifier; the ignition channel is purged with nitrogen to protect the central ignition channel.

[0035] In one embodiment, the integrated feeding device for the gasification and drying furnace further comprises a fuel gas delivery pipe and an ignition air delivery pipe, wherein the fuel gas delivery pipe is in communication with the ignition channel and the fuel channel, the ignition air delivery pipe is in communication with the ignition channel, an ignition fuel valve is arranged on the fuel gas delivery pipe, and an ignition air valve is arranged on the ignition air delivery pipe. In this embodiment, the ignition fuel gas delivery pipe is used to deliver ignition fuel gas to the ignition channel, and the ignition air delivery pipe is used to deliver air to the ignition channel.

[0036] In one embodiment, the fuel gas delivery pipe includes an ignition delivery branch pipe and a start-up delivery branch pipe, the ignition delivery branch pipe is connected to the ignition channel, and the start-up delivery branch pipe is connected to the fuel channel.

[0037] In this embodiment, the ignition delivery branch pipe is used to deliver the ignition fuel gas to the ignition channel, and the fuel channel is also used to deliver the start-up fuel gas to the gasification chamber. The start-up delivery branch pipe is used to deliver the start-up fuel gas to the gasification chamber through the fuel channel. The start-up fuel gas can be natural gas, refinery dry gas, or liquefied petroleum gas. In this embodiment, the start-up delivery branch pipe is connected to the outer coal slurry channel of the fuel channel. In this way, the outer coal slurry channel of the fuel channel is fed with start-up natural gas during the start-up phase, and with fuel raw materials during the fuel raw material feeding phase, so that the outer coal slurry channel of the fuel channel can be reused, making the structure of the integrated burner more streamlined.

[0038] In one embodiment, the integrated feeding device for the gasification furnace further includes a second nitrogen delivery pipe, which is connected to the start-up delivery branch pipe. In this embodiment, the second nitrogen delivery pipe is used to deliver high-pressure nitrogen, so that the start-up fuel gas and high-pressure nitrogen can be delivered to the gasifier at the same time. Since the start-up fuel gas is nitrogen-matched, the flow rate of the start-up fuel gas nozzle of the burner is increased, which can prevent the flame of the integrated burner from flashing back and increase the life of the integrated burner.

[0039] In one embodiment, the integrated feeding device for gasification and drying furnace further comprises an oxygen delivery pipe, the oxygen delivery pipe is in communication with the oxidant channel, and an oxygen valve is arranged on the oxygen delivery pipe. In this embodiment, the oxygen delivery pipe is used to deliver oxygen to the gasification chamber through the oxidant channel.

[0040] In one embodiment, the integrated feeding device for the gasification kiln further comprises a fuel raw material delivery pipe, the fuel raw material delivery pipe is connected to the fuel channel, and a fuel valve is arranged on the fuel raw material delivery pipe. In this embodiment, the fuel raw material delivery pipe is used to deliver fuel raw materials to the gasification chamber through the fuel channel, wherein the fuel channel comprises an inner coal slurry channel and an outer coal slurry channel, and the outer coal slurry channel can also be used as a start-up fuel gas channel to deliver the start-up fuel gas to the gasification chamber.

[0041] In this embodiment, the fuel raw material delivery pipe includes an inner fuel delivery pipe and an outer fuel delivery pipe, and the outer fuel delivery pipe is connected to the outer coal slurry channel of the fuel channel, so that the outer coal slurry channel of the fuel channel can be fed with coal slurry, and the start-up natural gas can be fed in the start-up stage. In this way, the outer coal slurry channel can be used to feed coal slurry and can also be used to feed natural gas, so that one channel can be reused, making the structure of the integrated burner more streamlined.

[0042] Embodiment 2

[0043] In this embodiment, Figure 1 As shown, a gasification furnace feeding integrated device is provided, which includes: a gasifier and an integrated burner; a gasification chamber is arranged in the gasifier, the first end of the gasifier has a feeding port, the feeding port is connected to the gasification chamber, the integrated burner is connected to the first end of the gasifier, and the integrated burner closes the feeding port; the integrated burner is provided with an ignition channel, an oxidant channel and a fuel channel, and the ignition channel, the oxidant channel and the fuel channel are respectively connected to the feeding port.

[0044] like Figure 1 and Figure 4 As shown, on the integrated burner, N8 and N9 are two inlets of the ignition channel, N3 and N4 are two inlets of the oxidant channel, N1 and N2 are the inlets of the fuel channel, and N5 and N6 are the inlets and outlets of the cooling water channel.

[0045] like Figure 1 As shown, the integrated gasification furnace feeding device also includes a first nitrogen delivery pipe 311, a second nitrogen delivery pipe 312, an oxygen delivery pipe 320, an ultra-high pressure nitrogen pipe 330, a fuel raw material delivery pipe (341, 342), a fuel gas delivery pipe 350 and an ignition air delivery pipe 360. Among them, the fuel gas delivery pipe 350 is used to deliver ignition fuel gas to the ignition channel, and the ignition fuel gas is natural gas. In this embodiment, the fuel gas delivery pipe 350 includes a delivery main pipe, an ignition delivery branch pipe and a start-up delivery branch pipe. One end of the delivery main pipe is used to connect with external natural gas, and the other end of the delivery main pipe is connected with one end of the ignition delivery branch pipe and one end of the start-up delivery branch pipe. The other end of the ignition delivery branch pipe is connected to the N9 inlet of the ignition channel, and the other end of the start-up delivery branch pipe is connected to the fuel raw material delivery pipe. An ignition fuel valve XV76 is provided on the delivery main pipe, and ignition fuel valves HV02, XV71 and XV72 are sequentially provided on the ignition delivery branch pipe along the delivery direction. The ignition delivery branch pipe is also connected to the fuel gas vent pipe, and the fuel gas vent pipe is provided with a fuel gas vent valve XV07; the start-up delivery branch pipe is sequentially provided with start-up delivery valves FV37, XV74, and XV75 along the delivery direction.

[0046] One end of the ignition air delivery pipe 360 ​​is connected to an external air source, and the other end is connected to the N8 inlet of the ignition channel. Ignition air valves FV77 and XV70 are sequentially arranged on the ignition air delivery pipe 360 ​​along the delivery direction, wherein the ignition air delivery pipe 360 ​​is also connected to an air vent pipe, and the connection between the ignition air delivery pipe 360 ​​and the air vent pipe is located between the ignition air valves FV77 and XV70, and the air vent pipe is provided with an air vent valve XV79.

[0047] The first nitrogen delivery pipe 311 is used to deliver high-pressure nitrogen. Nitrogen valves XV41, XV42 and XV73 are sequentially arranged on the first nitrogen delivery pipe 311 along the delivery direction. In this embodiment, the input end of the nitrogen valve XV41 is connected to the high-pressure nitrogen source, the output end of the nitrogen valve XV41 is respectively connected to the input end of XV42 and the input end of XV73, the output end of XV42 and the output end of XV73 are respectively connected to the ignition delivery branch pipe, wherein the output end of XV42 is connected to the position of the output end of XV72 on the ignition delivery branch pipe, and the output end of XV73 is connected to the position between XV71 and XV72 on the ignition delivery branch pipe.

[0048] The second nitrogen delivery pipe 312 is used to deliver high-pressure nitrogen. A nitrogen valve XV43 is provided on the second nitrogen delivery pipe 312. The nitrogen valve XV43 is connected to a position between the start-up delivery valves XV74 and XV75 on the start-up delivery branch pipe.

[0049] One end of the oxygen delivery pipe 320 is used to communicate with the oxygen source, and the other end is connected to the oxidant channels N3 and N4 on the integrated burner. Oxygen valves HV11, FV11, XV11, and XV12 are sequentially arranged on the oxygen delivery pipe 320 along the delivery direction, wherein the output end of the oxygen valve XV12 is respectively connected to the input end of the oxygen valve FV13 and the oxidant channel N3, and the output end of the oxygen valve FV13 is connected to the oxidant channel N4. The oxygen delivery pipe 320 is also connected to a start-up oxygen pipe, one end of which is connected to the position between the oxygen valves HV11 and FV11 on the oxygen delivery pipe 320, and the other end of which is connected to the position of the output end of the oxygen valve XV12 on the oxygen delivery pipe 320. Oxygen valves FV12, XV14, and XV15 are sequentially arranged on the start-up oxygen pipe along the delivery direction.

[0050] The oxygen delivery pipe 320 is also connected to an oxygen vent pipe, which is connected to a position between oxygen valves FV11 and XV11 on the oxygen delivery pipe 320. Oxygen vent valves XV13 and HV12 are sequentially arranged on the oxygen vent pipe along the delivery direction.

[0051] The ultra-high pressure nitrogen pipe 330 includes a nitrogen main pipe, a first nitrogen branch pipe, a second nitrogen branch pipe and a third nitrogen branch pipe. One end of the nitrogen main pipe is used to be connected to the ultra-high pressure nitrogen source, and the other end of the nitrogen main pipe is respectively connected to the first nitrogen branch pipe, the second nitrogen branch pipe and the third nitrogen branch pipe. Ultra-high pressure nitrogen valves XV31, XV16 and XV32 are sequentially arranged on the first nitrogen branch pipe along the conveying direction. The output end of XV31 is respectively connected to the input end of XV16 and the input end of XV32. The output end of XV16 is connected between oxygen valves XV14 and XV15 on the start-up oxygen pipe. The output end of XV32 is connected to the position between the oxygen valves XV11 and XV12 on the oxygen delivery pipe 320; the second nitrogen branch pipe is provided with ultra-high pressure nitrogen valves XV34 and XV35 in sequence along the delivery direction, and the output end of XV35 is connected to the position between the output end of the oxygen valve XV12 on the oxygen delivery pipe 320 and the oxidant channel N3, and is also connected to the FV13 and N4 ports; the third nitrogen branch pipe is provided with an ultra-high pressure nitrogen valve XV36, and the output end of XV36 is connected to the position between the output end of the oxygen valve FV13 on the oxygen delivery pipe 320 and the oxidant channel N4.

[0052] It is worth mentioning that the fuel raw material transported by the fuel raw material transport pipe enters the gasification chamber through the fuel channel. The fuel raw material can be pulverized coal, water-coal slurry, oil sludge, petroleum coke, natural gas, refinery dry gas or liquefied petroleum gas, preferably water-coal slurry. In the following embodiments, water-coal slurry is used as the fuel raw material for further explanation. In this embodiment, the fuel raw material delivery pipe includes an inner coal slurry delivery pipe 341 and an outer coal slurry delivery pipe 342, and the coal slurry gasification furnace device also includes an inner coal slurry pump and an outer coal slurry pump. The input end of the inner coal slurry pump is connected to the inner coal slurry source, and the output end of the inner coal slurry pump is connected to one end of the inner coal slurry delivery pipe 341. One end of the inner coal slurry delivery pipe 341 is connected to the inner coal slurry channel of the integrated burner. Fuel delivery valves XV01 and XV02 are sequentially arranged on the inner coal slurry delivery pipe 341 along the delivery direction. The inner coal slurry delivery pipe 341 is also connected to an inner coal slurry return pipe, and a coal slurry return valve XV03 is arranged on the inner coal slurry return pipe.

[0053] The input end of the outer coal slurry pump is connected to the outer coal slurry source, the output end of the outer coal slurry pump is connected to one end of the outer coal slurry delivery pipe 342, one end of the outer coal slurry delivery pipe 342 is connected to the outer coal slurry channel of the integrated burner, and the outer coal slurry delivery pipe 342 is provided with fuel delivery valves XV04 and XV05 in sequence along the delivery direction. The outer coal slurry delivery pipe 342 is also connected to an outer coal slurry return pipe, and the outer coal slurry return pipe is provided with a coal slurry return valve XV06.

[0054] The integrated feeding device of the gasification and drying furnace also includes a burner cooling water supply pipe and a burner cooling water recovery pipe. The burner cooling water supply pipe is connected to the cooling water channel N5, and the burner cooling water return pipe is connected to the cooling water channel N6.

[0055] It is worth mentioning that, in the above embodiments, among the valves, FV is a flow regulating valve for adjusting the flow rate, HV is a manual regulating valve for manually adjusting the flow rate, and XV is a switch valve for switching the pipeline.

[0056] Embodiment 3

[0057] In this embodiment, a control method for a gasification furnace feeding integrated device is provided, which is applied to the gasification furnace feeding integrated device described in any of the above embodiments, such as Figure 2 As shown, including:

[0058] Step 210, during the ignition phase, the ignition passage is opened, ignition fuel gas and factory air are delivered to the ignition passage of the integrated burner, and the ignition gun is started to ignite the ignition fuel gas in the ignition passage of the integrated burner.

[0059] In this step, the ignition fuel valves XV76, HV02 and the fuel gas vent valve XV07 are opened to establish the fuel gas ignition flow rate. The fuel gas is natural gas. In this embodiment, the fuel gas flow rate is 3-30 Nm3 / h, preferably 5-15 Nm3 / h. The factory air valves FV77 and XV79 are opened to establish the ignition factory air flow rate. The factory air flow rate is 15-300 Nm3 / h, preferably 50-150 Nm3 / h.

[0060] Start the ignition gun, then close the fuel gas vent valve XV07, and open the downstream valves XV71 and XV72 of the ignition fuel gas. Confirm that the ignition fuel gas valve is open, close the factory air vent valve XV79, and open the downstream valve XV70 of the factory air. Natural gas and factory air are sent into the ignition channel and ignited by the ignition gun. The ignition gun flame signal indicator appears, indicating that the ignition is successful.

[0061] Step 220, during the start-up and furnace baking stage, the outer coal slurry channel is opened, the start-up fuel gas is delivered to the outer coal slurry channel, and oxygen is delivered to the oxidant channel.

[0062] In this step, open the fuel gas regulating valve FV37 to the preset valve position, with a flow rate of 30-300Nm3 / h, preferably 50-200Nm3 / h. Open the start-up fuel gas upstream cut-off valve XV74. Open the oxygen boundary valve HV11, open the oxygen regulating valve FV12 to the preset valve position, with a flow rate of 30-600Nm3 / h, preferably 60-360Nm3 / h. Open the start-up oxygen upstream cut-off valve XV14. Close the central oxygen regulating valve FV13.

[0063] When the above valves are switched in place, open the downstream valve XV75 of the startup fuel gas, and at the same time open the nitrogen valve XV43, the nitrogen flow rate of the nitrogen is 30-200Nm3 / h, preferably 50-100Nm3 / h. After the startup fuel gas and nitrogen are fed into the gasifier, open the downstream cut-off valve XV15 of the startup oxygen, and start the startup furnace timer at the same time.

[0064] Step 230, detecting whether the start-up kiln ignition is successful, and when it is detected that the start-up kiln ignition is successful, stopping the supply of ignition fuel gas to the ignition channel.

[0065] In this embodiment, the gasifier is provided with a flame detector. When the flame detector detects a flame, it indicates that the start-up furnace ignition is successful. After the start-up furnace ignition is successful, the first shut-off valve and the second shut-off valve of the ignition fuel gas are closed, that is, the shut-off valves XV71 and XV72 are closed, and the factory air regulating valves FV77 and XV70 are closed. After the ignition fuel gas is closed, the high-pressure nitrogen valves XV41, XV42, and XV73 are opened to nitrogen plug the ignition fuel gas to prevent the fuel gas from entering the gasifier; the ignition channel is purged with nitrogen to protect the central ignition channel. The oxygen-fuel ratio control is put into use, and the flow rate is adjusted according to the start-up furnace curve. The gasifier is baked and the temperature and pressure are increased. After the fuel gas is nitrogen-matched, the flow rate of the burner start-up fuel gas nozzle is increased, the flame flashback of the integrated burner is prevented, and the life of the integrated burner is increased.

[0066] Step 240, in the coal feeding stage, fuel raw materials are fed into the gasifier through the fuel channel.

[0067] The gasifier is started and the temperature of the gasifier is raised to 500-1500°C, preferably 600-1300°C. The pressure of the gasifier is raised to 0.1-2.0MPaG, preferably 0.5-1.5MPaG. After the temperature and pressure of the gasifier reach the target value, the coal feeding procedure is started.

[0068] Open the oxygen vent valves XV13 and HV12, open the oxygen regulating valve FV11, and establish the oxygen start-up flow. Start the coal slurry pump, open the coal slurry circulation valves XV03 and XV06, and establish the inner coal slurry start-up circulation flow and the outer coal slurry start-up circulation flow. One or two coal slurry pumps can be used, and two coal slurry pumps are preferably used to transport the inner coal slurry and the outer coal slurry respectively.

[0069] When the above valves are in place, open the inner coal slurry switch valves XV01 and XV02, and close the circulation valve XV03 at the same time, and the coal slurry enters the gasifier. Then open the oxygen feed cut-off valves XV11 and XV12, open the central oxygen regulating valve FV13, and close the oxygen vent valves XV13 and HV12 at the same time.

[0070] After oxygen and coal slurry are fed into the gasifier, the pressure of the gasifier rises instantly. The pressure of the gasifier is maintained stable by opening the synthesis gas venting regulating valve. The success of coal feeding in the gasifier is determined by the pressure and flame detectors. The oxygen-coal ratio control is used to adjust the flow rate according to the pressure increase curve. The gasifier is pressurized to 0.3-2.5MPaG at a certain rate, preferably to 0.5-1.5MPaG, and the start-up fuel gas is turned off. Close the start-up fuel gas valves FV37, XV74, and XV75, and at the same time close the start-up oxygen valves FV12, XV14, and XV15.

[0071] After the above valves are closed, nitrogen plug the start-up fuel gas pipeline and start-up oxygen pipeline to prevent the start-up oxygen and fuel gas from entering the gasifier. Open the nitrogen plug valves XV31 and XV16 to nitrogen plug the start-up oxygen pipeline.

[0072] Open the outer coal slurry pipeline shut-off valves XV04 and XV05, and close the coal slurry circulation valve XV06 at the same time, and the outer coal slurry enters the gasifier. The outer coal slurry flow enters the oxygen-coal ratio adjustment.

[0073] The inner coal slurry, outer coal slurry and oxygen enter the gasifier, the ignition fuel gas and the start-up fuel gas are withdrawn accordingly, and the start-up sequence control is completed. The pressure and load are increased according to the gasifier load curve.

[0074] In one embodiment, the step of detecting whether the ignition of the start-up kiln is successful, and when the ignition of the start-up kiln is detected to be successful, stopping the delivery of the ignition fuel gas to the ignition channel includes: detecting whether the ignition of the start-up kiln is successful, and when the ignition of the start-up kiln is detected to be successful, closing the first shut-off valve and the second shut-off valve of the ignition delivery branch pipe, and performing nitrogen plugging between the first shut-off valve and the second shut-off valve, forming a nitrogen plug by high-pressure nitrogen to isolate the fuel gas and the gasifier synthesis gas.

[0075] In this embodiment, after the ignition fuel gas is stopped from being delivered, the nitrogen valve is opened to block the ignition fuel gas with nitrogen, thereby achieving nitrogen plugging of the ignition fuel gas to prevent the fuel gas from entering the gasifier; the ignition channel is purged with nitrogen to protect the central ignition channel.

[0076] Embodiment 4

[0077] In this embodiment, water-coal slurry gasification adopts an integrated burner, and the burner cooling water is put into use first to protect the integrated burner. The integrated burner has 2n+1 channels, which are the first channel to the 2n+1 channel from the inside to the outside in the axial direction, preferably 2≤n≤6. The most central channel is the ignition channel, which is passed with fuel gas and air for ignition. The even-numbered channels axially outward are used to provide oxidants to the burner, and the odd-numbered channels are used to provide fuel raw materials to the burner. It is also possible that the odd-numbered channels axially outward are used to provide oxidants to the burner, and the even-numbered channels are used to provide fuel raw materials to the burner. The fuel raw material can be pulverized coal, water-coal slurry, oil sludge, petroleum coke, natural gas, refinery dry gas or liquefied petroleum gas, and water-coal slurry is preferably used. The oxidant can be pure oxygen, oxygen-enriched air, or factory air.

[0078] Specifically, the integrated burner has 5 channels, which are channel 1 to channel 5 from the inside to the outside in the axial direction. The most central channel is the ignition channel, which is used to introduce fuel gas and air for ignition. The channels from the inside to the outside in the axial direction are the central oxygen channel, the inner coal slurry channel, the outer ring oxygen channel, and the outer coal slurry channel.

[0079] (1) Ignition process

[0080] Open the fuel gas valves XV76, HV02, and XV07 to establish the fuel gas ignition flow rate. The fuel gas can be natural gas, refinery dry gas, or liquefied petroleum gas. The fuel gas flow rate is 3 to 30 Nm3 / h, preferably 5 to 15 Nm3 / h. Open the factory air valves FV77 and XV79 to establish the ignition factory air flow rate, which is 15 to 300 Nm3 / h, preferably 50 to 150 Nm3 / h.

[0081] Start the ignition gun, then close the fuel gas vent valve XV07, and open the downstream valves XV71 and XV72 of the ignition fuel gas. Confirm that the ignition fuel gas valve is open, close the factory air vent valve XV79, and open the downstream valve XV70 of the factory air. The fuel gas and factory air are sent to the ignition channel and ignited by the ignition gun. The ignition gun flame signal indicator appears, indicating that the ignition is successful.

[0082] (2) Start-up process

[0083] Open the fuel gas regulating valve FV37 to the preset valve position, with a flow rate of 30-300Nm3 / h, preferably 50-200Nm3 / h. Open the start-up fuel gas upstream cut-off valve XV74. Open the oxygen boundary valve HV11, open the oxygen regulating valve FV12 to the preset valve position, with a flow rate of 30-600Nm3 / h, preferably 60-360Nm3 / h. Open the start-up oxygen upstream cut-off valve XV14. Close the central oxygen regulating valve FV13.

[0084] When the above valves are in place, open the downstream valve XV75 of the startup fuel gas, and at the same time open the nitrogen valve XV43, the nitrogen flow rate of the nitrogen is 30-200Nm3 / h, preferably 50-100Nm3 / h. After the startup fuel gas and nitrogen are sent into the gasifier, open the downstream cut-off valve XV15 of the startup oxygen, and start the startup furnace timer at the same time.

[0085] The flame detector installed in the gasifier detects the flame, indicating that the start-up drying furnace has been ignited successfully. After the start-up drying furnace has been ignited successfully, close the ignition fuel gas cut-off valves XV71 and XV72, and close the factory air control valves FV77 and XV70. After closing the ignition fuel gas, open the high-pressure nitrogen valves XV41, XV42, and XV73, and nitrogen plug the ignition fuel gas to prevent the fuel gas from entering the gasifier; nitrogen purge the ignition channel to protect the central ignition channel. Use oxygen-fuel ratio control, adjust the flow according to the start-up drying furnace curve, and the gasifier will be dried to increase the temperature and pressure.

[0086] (3) Coal feeding process

[0087] The gasifier is started and the temperature of the gasifier is raised to 500-1500°C, preferably 600-1300°C. The pressure of the gasifier is raised to 0.1-2.0MPaG, preferably 0.5-1.5MPaG. After the temperature and pressure of the gasifier reach the target value, the coal feeding procedure is started.

[0088] Open the oxygen vent valves XV13 and HV12, open the oxygen regulating valve FV11, and establish the oxygen start-up flow. Start the coal slurry pump, open the coal slurry circulation valves XV03 and XV06, and establish the inner coal slurry start-up circulation flow and the outer coal slurry start-up circulation flow. One or two coal slurry pumps can be used, and two coal slurry pumps are preferably used to transport the inner coal slurry and the outer coal slurry respectively.

[0089] When the above valves are in place, open the inner coal slurry switch valves XV01 and XV02, and close the circulation valve XV03 at the same time, and the coal slurry enters the gasifier. Then open the oxygen feed cut-off valves XV11 and XV12, open the central oxygen regulating valve FV13, and close the oxygen vent valves XV13 and HV12 at the same time.

[0090] After oxygen and coal slurry are fed into the gasifier, the pressure of the gasifier rises instantly. The pressure of the gasifier is maintained stable by opening the synthesis gas venting regulating valve. The success of coal feeding in the gasifier is determined by the pressure and flame detectors. The oxygen-coal ratio control is used to adjust the flow rate according to the pressure increase curve. The gasifier is pressurized to 0.3-2.5MPaG at a certain rate, preferably to 0.5-1.5MPaG, and the start-up fuel gas is turned off. Close the start-up fuel gas valves FV37, XV74, and XV75, and at the same time close the start-up oxygen valves FV12, XV14, and XV15.

[0091] After the above valves are closed, nitrogen plug the start-up fuel gas pipeline and start-up oxygen pipeline to prevent the start-up oxygen and fuel gas from entering the gasifier. Open the nitrogen plug valves XV31 and XV16 to nitrogen plug the start-up oxygen pipeline.

[0092] Open the outer coal slurry pipeline shut-off valves XV04 and XV05, and close the coal slurry circulation valve XV06 at the same time, and the outer coal slurry enters the gasifier. The outer coal slurry flow enters the oxygen-coal ratio adjustment.

[0093] The inner coal slurry, outer coal slurry and oxygen enter the gasifier, the ignition fuel gas and the start-up fuel gas are withdrawn accordingly, and the start-up sequence control is completed. The pressure and load are increased according to the gasifier load curve.

[0094] This embodiment has the following effects:

[0095] (1) The start-up fuel gas uses the ingenious design of the coal slurry channel of the burner, and no separate start-up fuel gas channel is set up, which simplifies the structure of the burner and improves the reliability of the burner.

[0096] (2) The start-up fuel gas was nitrogen-added to increase the flow rate of the burner start-up fuel gas nozzle, prevent the burner flame from flashing back, and increase the life of the integrated burner.

[0097] (3) The multi-channel integrated burner realizes ignition, furnace baking and coal feeding, saving on-site workload.

[0098] (4) A separate start-up oxygen pipeline is set up to achieve stable regulation of the start-up oxygen flow rate, which can stably control the oxygen-coal ratio of gasification, prevent the gasifier from overheating, and ensure the safety of gasification.

[0099] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A gasification furnace feeding integrated device, characterized in that: include: Gasifier and integrated burner; A gasification chamber is provided in the gasification furnace, a first end of the gasification furnace has a feeding port, the feeding port is communicated with the gasification chamber, the integrated burner is connected to the first end of the gasification furnace, and the integrated burner closes the feeding port; The integrated burner is provided with an ignition channel, an oxidant channel and a fuel channel. The ignition channel, the oxidant channel and the fuel channel are respectively connected to the feeding port. The fuel channel is used to introduce start-up fuel gas or fuel raw materials into the gasification chamber.

2. The integrated feeding device for gasification and drying furnace according to claim 1, characterized in that: The integrated burner has 2n+1 channels, and each of the channels is arranged from inside to outside along the axial direction.

3. The integrated feeding device for gasification and drying furnace according to claim 2, characterized in that: The channel located at the center of the integrated burner is the ignition channel, and the oxidant channel and the fuel channel are arranged axially from inside to outside.

4. The integrated feeding device for gasification and drying furnace according to claim 1, characterized in that: It also includes a first nitrogen delivery pipe, on which a nitrogen valve is provided, and the first nitrogen delivery pipe is connected to the ignition channel.

5. The integrated feeding device for gasification and drying furnace according to claim 1, characterized in that: It also includes a fuel gas delivery pipe and an ignition air delivery pipe, the fuel gas delivery pipe is connected to the ignition channel and the fuel channel, the ignition air delivery pipe is connected to the ignition channel, the fuel gas delivery pipe is provided with an ignition fuel valve, and the ignition air delivery pipe is provided with an ignition air valve.

6. The integrated feeding device for gasification and drying furnace according to claim 6, characterized in that: The fuel gas delivery pipe includes an ignition delivery branch pipe and a start-up delivery branch pipe, the ignition delivery branch pipe is connected to the ignition channel, and the start-up delivery branch pipe is connected to the fuel channel.

7. The integrated feeding device for gasification and drying furnace according to claim 1, characterized in that: It also includes an oxygen delivery pipe, which is communicated with the oxidant channel and is provided with an oxygen valve.

8. The integrated feeding device for gasification and drying furnace according to claim 1, characterized in that: It also includes a fuel raw material delivery pipe, which is communicated with the fuel channel and is provided with a fuel valve.

9. A control method for a gasification and drying furnace integrated feeding device, applied to the gasification and drying furnace integrated feeding device as claimed in any one of claims 1 to 8, characterized in that: include: In the ignition stage, the ignition channel is opened, the ignition fuel gas and factory air are delivered to the ignition channel of the integrated burner, and the ignition gun is started to ignite the ignition fuel gas in the ignition channel of the integrated burner; During the start-up and baking stage, the fuel channel is opened, the start-up fuel gas is delivered to the fuel channel, and oxygen is delivered to the oxidant channel; Detecting whether the ignition of the start-up drying furnace is successful, and when it is detected that the ignition of the start-up drying furnace is successful, stopping the supply of ignition fuel gas and factory air to the ignition channel; In the coal feeding stage, fuel raw materials are fed into the gasifier through the fuel channel, and oxidant is fed into the gasifier through the oxidant channel.

10. The control method of the integrated feeding device for gasification and drying furnace according to claim 9, characterized in that: The step of detecting whether the ignition of the start-up drying furnace is successful, and stopping the delivery of the ignition fuel gas to the ignition channel when the ignition of the start-up drying furnace is successful, comprises: Check whether the start-up kiln ignition is successful. When the start-up kiln ignition is successful, close the first shut-off valve and the second shut-off valve of the ignition delivery branch pipe, and nitrogen plug the first shut-off valve and the second shut-off valve of the channel for delivering the ignition fuel gas. The nitrogen plug is formed by high-pressure nitrogen to isolate the fuel gas and the gasifier synthesis gas.

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