Flue gas generator for test

Abstract

The invention discloses a flue gas generator for tests and relates to the technical field of marine turbines. In order to solve the problem that when a single-machine test of a turbocharging unit is carried out, a flue gas generator in a supercharged boiler needs to be used for supplying flue gas with rated temperature and flow to the marine turbocharging unit so as to ensure normal work of the turbocharging unit, but the flue gas generator and the supercharged boiler work at the same time to carry out the test, the oil consumption is large, and thus resource waste is caused. When the smoke generator is used, the flow regulating valve is arranged between the air inlet pipeline and the air inlets, the air inlet amount of the first-stage air inlet, the second-stage air inlet and the third-stage air inlet of the smoke generator can be distributed, smoke generated by combusting 1.4 t / h fuel oil is mixed twice to form new smoke, and the smoke generated by combusting 1.4 t / h fuel oil is mixed twice. The temperature and the flow of the new flue gas can meet the use requirements of a flue gas turbine of the turbocharging unit when the maximum load is reached, mixed flue gas generated by 1.4 t / h fuel oil of the flue gas generator is equivalent to flue gas generated by 8-10 t / h fuel oil of a supercharged boiler, and the test requirements of the turbocharging unit can be met. The invention is applicable to the field of marine turbines.

Description

Technical Field

[0001] The invention relates to the technical field of marine steam turbines, and in particular to a test smoke generator. Background Art

[0002] With the continuous development of industry, the demand for high-temperature flue gas is increasing. Flue gas generators are one of the main sources of high-temperature flue gas in industrial production. The fuel ignites and burns in the flue gas generator, and the high-temperature flue gas generated can be used for heating, work or regulating chemical conversion processes. Flue gas generators can be roughly divided into several categories according to the type of fuel burned, such as light oil burners, heavy oil burners, pulverized coal burners, and gas burners. Compared with light oil burners and gas burners, the cleanliness of flue gas is greatly reduced due to the high content of impurities and pollutants in fuels such as pulverized coal, heavy oil or residual oil, which increases the cost of flue gas dust removal and clean treatment; in addition, the viscosity of heavy oil is high, and in order to increase its fluidity, it is necessary to use auxiliary heating equipment to heat it. Therefore, in order to obtain clean high-temperature flue gas, gas burners and light oil burners are better choices. Naphtha, gasoline or pure component liquid hydrocarbon fuels are the main fuels for light oil flue gas generators, and natural gas, coal gas or pure component light hydrocarbons and other gaseous fuels are the main fuels for gas flue gas generators. The high-temperature flue gas produced by these two types of flue gas generators has high cleanliness, stable ignition, rapid temperature response, and a wide range of flue gas volume and composition adjustment. They are widely used flue gas generators.

[0003] At present, marine turbocharger units are used in conjunction with booster boilers to form a turbocharger boiler device. When conducting a single-unit test of the turbocharger unit, it is necessary to use the flue gas generator inside the booster boiler to supply flue gas of rated temperature and flow to the marine turbocharger unit to ensure the normal operation of the turbocharger unit. However, when both are working at the same time for the experiment, it results in high fuel consumption, which leads to the problem of waste of resources. Summary of the invention

[0004] The present invention proposes a test smoke generator to solve the problem that when conducting a single-unit test of a turbocharger unit, it is necessary to use a smoke generator inside a booster boiler to supply smoke of rated temperature and flow to the marine turbocharger unit to ensure the normal operation of the turbocharger unit, but when both work simultaneously to conduct the experiment, it leads to high fuel consumption and thus waste of resources.

[0005] The smoke generator for testing of the present invention comprises a burner 1, an inner shell support 2, an inner shell 4, a refractory layer 5, an outer shell 6, a retaining ring 7, a primary air inlet 9, a secondary air inlet 10, a tertiary air inlet 11, a fire viewing port 12, a baffle 13 and a refractory brick layer 14;

[0006] A burner 1 is provided at one end of the inner cavity of the outer shell 6, an inner shell support 2 is provided in the middle of the inner cavity of the outer shell 6, an inner shell 4 is provided on the inner shell support 2, a refractory layer 5 is provided on the inner wall of the inner shell 4, the output end of the burner 1 is connected to the input end of the inner shell 4, and a baffle 13 is provided at the connection between the output end of the burner 1 and the input end of the inner shell 4, a refractory brick layer 14 is provided between the side of the baffle 13 and the outer surface of the input end of the inner shell 4, a retaining ring 7 is provided at the other end of the inner cavity of the outer shell 6, and the inner wall of the retaining ring 7 contacts the outer surface of the inner shell 4, the outer surface of the outer shell 6 is provided with a first-level air inlet 9, two second-level air inlets 10 and a third-level air inlet 11 in sequence along the length direction, and three fire viewing ports 12 are evenly provided in the middle of the outer surface of the outer shell 6 along the length direction, each fire viewing port 12 is embedded with an expansion joint, and the expansion joint is embedded with high-temperature blue glass;

[0007] Furthermore, two housing supports 3 are evenly arranged at the bottom of the housing 6 along the length direction;

[0008] Furthermore, the outer surface of the housing 6 is provided with a heat-insulating layer 8;

[0009] Furthermore, one end of the shell 6 is provided with a front head, and the other end of the shell 6 is provided with a rear head;

[0010] Furthermore, the axial cross section of the refractory brick layer 14 is circular, and 20 through holes are evenly opened on the end surface of the refractory brick layer 14 along the circumferential direction;

[0011] Furthermore, the inner diameter of the through hole on the end surface of the refractory brick layer 14 is 66 mm;

[0012] Furthermore, the output end of the inner shell 4 is connected to one end of the primary mixing air duct, the other end of the primary mixing air duct is connected to one end of the secondary mixing air duct, and the other end of the secondary mixing air duct is connected to the rear end of the outer shell 6;

[0013] Furthermore, the outer circumferential surface of the primary mixing air cylinder is processed with five rows of ventilation holes, and each row is provided with 20 holes;

[0014] Furthermore, three rows of ventilation holes are processed on the circumferential outer surface of the secondary mixing air cylinder, and each row is provided with 15 holes;

[0015] Furthermore, the inner diameters of the vent holes on the primary mixing air cylinder and the secondary mixing air cylinder are both 66 mm;

[0016] Furthermore, a ventilation sleeve is sleeved on the outer wall of the primary mixing air duct, and an air inlet is processed on the ventilation sleeve, and the axis of the air inlet forms an angle of 45° with the horizontal line;

[0017] Furthermore, when in use, the smoke generator is mainly composed of two parts: combustion and mixing. The combustion is carried out in the inner cylindrical furnace of the double-layer shell of the smoke generator. The air used for combustion is The first-level air inlet enters the burner interlayer space, and then enters the combustion chamber through the air regulator to mix with the fuel sprayed by the injector for combustion; the inner shell, i.e. the combustion chamber, is composed of 113 mm thick special-shaped refractory bricks and 40 mm thick insulation layer, the first mixing section is composed of 113 mm thick rammed refractory concrete and 40 mm thick insulation layer, and the second mixing section is directly made of heat-resistant steel; air inlet holes are opened on the front wall of the inner shell and the first and second mixing sections to facilitate air entry and mixing; an annular air channel is formed between the inner shell and the pressure-bearing outer shell of the smoke generator, which consists of 2 diameter The air entering from the secondary air inlet can cool the inner shell and enter the combustion chamber to mix with the hot flue gas generated by combustion; the air entering from the small holes around the refractory bricks on the front wall can prevent the refractory bricks from burning, but the temperature of the combustion chamber outlet should be controlled above 900℃ to stabilize combustion; The air entering from the three-stage air inlet is mixed with the flue gas for a second time in the combustion chamber outlet channel until the mixture is even and reaches the temperature required by the flue gas turbine. The inner side of the pressure-bearing outer shell is cooled by the air entering from the air inlets at each level, and the outer side is insulated with a 150 mm thick insulation layer.

[0018] Fuel: The maximum load rated fuel capacity is about 1.4t / h, and the fuel is light diesel.

[0019] A flow regulating valve is provided between the air intake pipeline and the air inlet, which can distribute the air intake of the first-stage air inlet, the second-stage air inlet, and the third-stage air inlet. The flue gas generated by burning 1.4t / h of fuel oil forms new flue gas after two mixing. The temperature and flow of the new flue gas can meet the maximum load of the flue gas turbine of the turbocharger unit. The mixed flue gas generated by the 1.4t / h fuel oil of the flue gas generator is equivalent to the flue gas generated by the 8-10t / h fuel oil of the booster boiler. The flue gas generator has the ability to change operating conditions and can meet the test requirements of various operating conditions of the turbocharger unit.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention overcomes the shortcomings of the prior art. When in use, a flow regulating valve is arranged between the air intake pipeline and the air inlet, which can distribute the air intake of the primary air inlet, the secondary air inlet and the tertiary air inlet of the smoke gas generator. The smoke generated by burning 1.4t / h of fuel is mixed twice to form new smoke. The temperature and flow of the new smoke can meet the use of the maximum load of the smoke turbine of the turbocharger unit. The mixed smoke generated by the 1.4t / h fuel of the smoke gas generator is equivalent to the smoke generated by the 8-10t / h fuel of the supercharged boiler. The smoke generator has the ability to change operating conditions and can meet the test requirements of various operating conditions of the turbocharger unit; thereby meeting the smoke supply to the turbocharger unit, there is no need to use the smoke generator inside the supercharged boiler to supply the marine turbocharger unit with smoke of rated temperature and flow, and the use of a smoke generator with such a structure can reduce fuel consumption, further save resources and avoid waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a main cross-sectional view of a test smoke generator according to the present invention;

[0023] Figure 2 It is a side sectional view of an experimental smoke generator according to the present invention;

[0024] Figure 3 is a schematic diagram of a test smoke generator according to the present invention when in use;

[0025] Figure 4 It is a main cross-sectional schematic diagram of an inner shell of a test smoke generator according to the present invention;

[0026] Figure 5 It is a BB side section schematic diagram of an inner shell in a test smoke generator described in the present invention. DETAILED DESCRIPTION

[0027] Specific implementation method 1: Combination Figures 1 to 5 The present embodiment is described. The experimental smoke generator described in the present embodiment comprises a burner 1, an inner shell support 2, an inner shell 4, a refractory layer 5, an outer shell 6, a retaining ring 7, a primary air inlet 9, a secondary air inlet 10, a tertiary air inlet 11, a fire viewing port 12, a baffle 13 and a refractory brick layer 14;

[0028] A burner 1 is provided at one end of the inner cavity of the outer shell 6, an inner shell support 2 is provided in the middle of the inner cavity of the outer shell 6, an inner shell 4 is provided on the inner shell support 2, a refractory layer 5 is provided on the inner wall of the inner shell 4, the output end of the burner 1 is connected to the input end of the inner shell 4, and a baffle 13 is provided at the connection between the output end of the burner 1 and the input end of the inner shell 4, a refractory brick layer 14 is provided between the side of the baffle 13 and the outer surface of the input end of the inner shell 4, a retaining ring 7 is provided at the other end of the inner cavity of the outer shell 6, and the inner wall of the retaining ring 7 contacts the outer surface of the inner shell 4, the outer surface of the outer shell 6 is provided with a first-level air inlet 9, two second-level air inlets 10 and a third-level air inlet 11 in sequence along the length direction, and three fire viewing ports 12 are evenly provided in the middle of the outer surface of the outer shell 6 along the length direction, each fire viewing port 12 is embedded with an expansion joint, and the expansion joint is embedded with high-temperature blue glass;

[0029] In this specific embodiment, when in use, the smoke generator mainly consists of two parts: combustion and mixing. The combustion is carried out in the inner cylindrical furnace of the double-layer shell of the smoke generator. The air used for combustion is a cylinder with a diameter of The first-level air inlet enters the burner interlayer space, and then enters the combustion chamber through the air regulator to mix with the fuel sprayed by the injector for combustion; the inner shell, i.e. the combustion chamber, is composed of 113 mm thick special-shaped refractory bricks and 40 mm thick insulation layer, the first mixing section is composed of 113 mm thick rammed refractory concrete and 40 mm thick insulation layer, and the second mixing section is directly made of heat-resistant steel; air inlet holes are opened on the front wall of the inner shell and the first and second mixing sections to facilitate air entry and mixing; an annular air channel is formed between the inner shell and the pressure-bearing outer shell of the smoke generator, which consists of 2 diameter The air entering from the secondary air inlet can cool the inner shell and enter the combustion chamber to mix with the hot flue gas generated by combustion; the air entering from the small holes around the refractory bricks on the front wall can prevent the refractory bricks from burning, but the temperature of the combustion chamber outlet should be controlled above 900℃ to stabilize combustion; The air entering from the three-stage air inlet is mixed with the flue gas for a second time in the combustion chamber outlet channel until the mixture is even and reaches the temperature required by the flue gas turbine. The inner side of the pressure-bearing outer shell is cooled by the air entering from the air inlets at each level, and the outer side is insulated with a 150 mm thick insulation layer.

[0030] Fuel: The maximum load rated fuel capacity is about 1.4t / h, and the fuel is light diesel.

[0031] A flow regulating valve is provided between the air intake pipeline and the air inlet, which can distribute the air intake of the first-stage air inlet, the second-stage air inlet, and the third-stage air inlet. The flue gas generated by burning 1.4t / h of fuel oil forms new flue gas after two mixing. The temperature and flow of the new flue gas can meet the maximum load of the flue gas turbine of the turbocharger unit. The mixed flue gas generated by the 1.4t / h fuel oil of the flue gas generator is equivalent to the flue gas generated by the 8-10t / h fuel oil of the booster boiler. The flue gas generator has the ability to change operating conditions and can meet the test requirements of various operating conditions of the turbocharger unit.

[0032] Specific implementation method 2: Combination Figures 1 to 5 This embodiment is described. This embodiment is a further limitation of the smoke generator described in the first embodiment. In the experimental smoke generator described in this embodiment, two shell supports 3 are evenly arranged at the bottom of the shell 6 along the length direction.

[0033] Specific implementation method three: Combination Figures 1 to 5 This embodiment is described. This embodiment is a further limitation of the smoke generator described in the second embodiment. In the experimental smoke generator described in this embodiment, the outer surface of the shell 6 is provided with a heat-insulating layer 8.

[0034] Specific implementation method four: Combination Figures 1 to 5 This embodiment is described. This embodiment is a further limitation of the smoke generator described in the third embodiment. In the experimental smoke generator described in this embodiment, one end of the housing 6 is provided with a front end cap, and the other end of the housing 6 is provided with a rear end cap;

[0035] In this specific implementation, on the front head: a size of The flange pipe is connected to the burner flange; on the rear head: a flange pipe with a size of The flange pipe is connected to the air inlet pipe of the flue gas turbine; the outer surface of the shell 6 is provided with a primary air inlet 9, two secondary air inlets 10 and a tertiary air inlet 11 in sequence along the length direction, and four air inlets are opened in the shell; the size is short tube for the burner to enter the combustion air; two sizes of A short pipe for the combustion chamber cooling air to enter; the size is A short pipe is provided to allow air for cooling the combustion chamber outlet section to enter; on the side lower shell: a manhole with a size of 450X350 to enter the burner interlayer space, so that the burner can be disassembled and inspected.

[0036] Specific implementation method five: Combination Figures 1 to 5This embodiment is described. This embodiment is a further limitation of the smoke generator described in the first embodiment. In the experimental smoke generator described in this embodiment, the axial cross section of the refractory brick layer 14 is circular, and 20 through holes are evenly opened on the end surface of the refractory brick layer 14 along the circumferential direction;

[0037] In this specific implementation, 20 through holes are evenly opened on the end surface of the refractory brick layer 14 along the circumferential direction to prevent the refractory brick layer 14 from burning out and extend the service life.

[0038] Specific implementation method six: Combination Figures 1 to 5 This embodiment is described as a further limitation of the smoke generator described in the fifth embodiment. In the experimental smoke generator described in this embodiment, the inner diameter of the through hole on the end surface of the refractory brick layer 14 is 66 mm.

[0039] Specific implementation method seven: Combination Figures 1 to 5 To explain this embodiment, this embodiment is a further limitation of the smoke generator described in the specific embodiment one. In the experimental smoke generator described in this embodiment, the output end of the inner shell 4 is connected to one end with a primary mixing wind tube, the other end with the primary mixing wind tube is connected to one end with a secondary mixing wind tube, and the other end with the secondary mixing wind tube is connected to the rear head of the outer shell 6.

[0040] Specific implementation method eight: Combination Figures 1 to 5 This embodiment is described. This embodiment is a further limitation of the smoke generator described in the seventh embodiment. In the experimental smoke generator described in this embodiment, five rows of ventilation holes are processed on the circumferential outer surface of the primary mixing air cylinder, and each row is provided with 20 holes; three rows of ventilation holes are processed on the circumferential outer surface of the secondary mixing air cylinder, and each row is provided with 15 holes;

[0041] In this specific implementation method, five rows of ventilation holes are processed on the circumferential outer surface of the primary mixing duct, and each row is provided with 20 holes to ensure the primary mixing of hot flue gas and air; and three rows of ventilation holes are processed on the circumferential outer surface of the secondary mixing duct, and each row is provided with 15 holes to ensure the secondary mixing of hot flue gas and air.

[0042] Specific implementation method nine: Combination Figures 1 to 5 To explain this embodiment, this embodiment is a further limitation of the smoke generator described in the eighth specific embodiment. In this embodiment, the smoke generator for testing is described, and the inner diameters of the air holes on the primary mixing air duct and the secondary mixing air duct are both 66 mm.

[0043] Specific implementation method ten: Combination Figures 1 to 5This embodiment is described. This embodiment is a further limitation of the smoke generator described in the ninth embodiment. In the experimental smoke generator described in this embodiment, a ventilation sleeve is sleeved on the outer wall of the primary mixing air duct, and an air inlet hole is processed on the ventilation sleeve, and the axis of the air inlet forms an angle of 45° with the horizontal line;

[0044] In this specific implementation method, the ventilation sleeve is processed with an air inlet hole, and the axis of the air inlet forms an angle of 45° with the horizontal line, ensuring that the resistance is minimal and the flow rate is maximized when the air is mixed once.

[0045] How it works

[0046] When in use, the flue gas generator is mainly composed of two parts: combustion and mixing. The combustion is carried out in the inner cylindrical furnace of the double-layer shell of the flue gas generator. The air used for combustion is The first-level air inlet enters the burner interlayer space, and then enters the combustion chamber through the air regulator to mix with the fuel sprayed by the injector for combustion; the inner shell, i.e. the combustion chamber, is composed of 113 mm thick special-shaped refractory bricks and 40 mm thick insulation layer, the first mixing section is composed of 113 mm thick rammed refractory concrete and 40 mm thick insulation layer, and the second mixing section is directly made of heat-resistant steel; air inlet holes are opened on the front wall of the inner shell and the first and second mixing sections to facilitate air entry and mixing; an annular air channel is formed between the inner shell and the pressure-bearing outer shell of the smoke generator, which consists of 2 diameter The air entering from the secondary air inlet can cool the inner shell and enter the combustion chamber to mix with the hot flue gas generated by combustion; the air entering from the small holes around the refractory bricks on the front wall can prevent the refractory bricks from burning, but the temperature of the combustion chamber outlet should be controlled above 900℃ to stabilize combustion; The air entering from the three-stage air inlet is mixed with the flue gas for a second time in the combustion chamber outlet channel until the mixture is even and reaches the temperature required by the flue gas turbine. The inner side of the pressure-bearing outer shell is cooled by the air entering from the air inlets at each level, and the outer side is insulated with a 150 mm thick insulation layer.

[0047] Fuel: The maximum load rated fuel capacity is about 1.4t / h, and the fuel is light diesel.

[0048] A flow regulating valve is provided between the air intake pipeline and the air inlet, which can distribute the air intake of the first-stage air inlet, the second-stage air inlet, and the third-stage air inlet. The flue gas generated by burning 1.4t / h of fuel oil forms new flue gas after two mixing. The temperature and flow of the new flue gas can meet the maximum load of the flue gas turbine of the turbocharger unit. The mixed flue gas generated by the 1.4t / h fuel oil of the flue gas generator is equivalent to the flue gas generated by the 8-10t / h fuel oil of the booster boiler. The flue gas generator has the ability to change operating conditions and can meet the test requirements of various operating conditions of the turbocharger unit.

Claims

1. A test smoke generator, characterized in that: It comprises a burner (1), an inner shell support (2), an inner shell (4), a refractory layer (5), an outer shell (6), a retaining ring (7), a primary air inlet (9), a secondary air inlet (10), a tertiary air inlet (11), a fire viewing port (12), a baffle (13) and a refractory brick layer (14); A burner (1) is provided at one end of the inner cavity of the outer shell (6), an inner shell support (2) is provided in the middle of the inner cavity of the outer shell (6), an inner shell (4) is provided on the inner shell support (2), a refractory layer (5) is provided on the inner wall of the inner shell (4), an output end of the burner (1) is connected to an input end of the inner shell (4), a baffle (13) is provided at the connection between the output end of the burner (1) and the input end of the inner shell (4), a refractory brick layer is provided between the side surface of the baffle (13) and the outer surface of the input end of the inner shell (4) (14), a retaining ring (7) is provided at the other end of the inner cavity of the outer shell (6), and the inner wall of the retaining ring (7) contacts the outer surface of the inner shell (4), and the outer surface of the outer shell (6) is provided with a first-level air inlet (9), two second-level air inlets (10) and a third-level air inlet (11) in sequence along the length direction, and three fire viewing ports (12) are evenly arranged in the middle of the outer surface of the outer shell (6) along the length direction, and an expansion joint is embedded in each fire viewing port (12), and high-temperature blue glass is embedded in the expansion joint.

2. A test smoke generator according to claim 1, characterized in that: The bottom of the shell (6) is evenly provided with two shell supports (3) along the length direction.

3. A test smoke generator according to claim 2, characterized in that: The outer surface of the shell (6) is provided with a heat-insulating layer (8).

4. A test smoke generator according to claim 3, characterized in that: One end of the shell (6) is provided with a front seal, and the other end of the shell (6) is provided with a rear seal.

5. A test smoke generator according to claim 1, characterized in that: The axial cross section of the refractory brick layer (14) is circular, and 20 through holes are evenly opened on the end surface of the refractory brick layer (14) along the circumferential direction.

6. A test smoke generator according to claim 5, characterized in that: The inner diameter of the through hole on the end surface of the refractory brick layer (14) is 66 mm.

7. A test smoke generator according to claim 1, characterized in that: The output end of the inner shell (4) is connected to one end of the primary mixing air duct, the other end of the primary mixing air duct is connected to one end of the secondary mixing air duct, and the other end of the secondary mixing air duct is connected to the rear end cap of the outer shell (6).

8. A test smoke generator according to claim 7, characterized in that: The outer circumferential surface of the air duct with primary mixing is processed with five rows of ventilation holes, and each row is provided with 20 holes; the outer circumferential surface of the air duct with secondary mixing is processed with three rows of ventilation holes, and each row is provided with 15 holes.

9. A test smoke generator according to claim 8, characterized in that: The inner diameters of the vent holes on the primary mixing air cylinder and the secondary mixing air cylinder are both 66 mm.

10. A test smoke generator according to claim 9, characterized in that: A ventilation sleeve is sleeved on the outer wall of the primary mixing air duct, and an air inlet hole is processed on the ventilation sleeve, and the axis of the air inlet forms an angle of 45° with the horizontal line.

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