A test smoke generator

Abstract

A test flue gas generator relates to the field of marine steam turbine. To solve the problem that when the turbocharger unit single machine test is carried out, the flue gas generator inside the supercharged boiler needs to supply rated temperature and flow of flue gas to the marine turbocharger unit to ensure the normal work of the turbocharger unit, but the two work at the same time, the oil consumption is large, which leads to the waste of resources. The flow regulating valve is arranged between the air inlet pipeline and the air inlet in use, which can distribute the air inlet of the first stage, the second stage and the third stage of the flue gas generator. The flue gas generated by burning 1.4t / h fuel oil is mixed twice to form new flue gas, and the temperature and flow of the new flue gas can meet the use of the flue gas turbine of the turbocharger unit under the maximum load. The mixed flue gas generated by the flue gas generator 1.4t / h fuel oil is equivalent to the flue gas generated by the supercharged boiler 8-10t / h fuel oil, which can meet the test demand of the turbocharger unit. The present application is suitable for the field of marine steam turbine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of marine steam turbine, in particular to a test flue gas generator. BACKGROUND

[0002] With the continuous development of industry, the demand for high-temperature flue gas is increasing, and the flue gas generator is one of the main sources of high-temperature flue gas in industrial production. The fuel is ignited and burned in the flue gas generator, and the high-temperature flue gas can be used for heating, working or regulating chemical conversion process. The flue gas generator can be divided into light oil burner, heavy oil burner, coal powder burner, gas burner and several other categories according to the type of burning fuel. Compared with light oil burner and gas burner, the content of impurities and pollutants in coal powder, heavy oil or residual oil and other fuels is relatively high, which greatly reduces the cleanliness of flue gas and increases the cost of flue gas dust removal and cleaning. In addition, the viscosity of heavy oil is high, and auxiliary heating equipment is needed to heat it in order to increase its fluidity. Therefore, in order to obtain clean high-temperature flue gas, gas burner and light oil burner are the better choice. Naphtha, gasoline or pure component liquid hydrocarbon fuel is the main fuel of light oil flue gas generator, and natural gas, coal gas or pure component light hydrocarbon gas fuel is the main fuel of gas flue gas generator. The high-temperature flue gas produced by the two kinds of flue gas generators has high cleanliness, stable ignition, rapid temperature response, and wide range of flue gas quantity and composition adjustment, and is widely used flue gas generator.

[0003] At present, the marine turbocharger unit is matched with the supercharged boiler to form a turbocharged boiler device. When the single machine test of the turbocharger unit is carried out, the flue gas generator inside the supercharged boiler is used to supply the rated temperature and flow rate of the flue gas to the marine turbocharger unit to ensure the normal work of the turbocharger unit. However, the simultaneous work of the two for experiment leads to large oil consumption, thereby causing the problem of resource waste. SUMMARY

[0004] The present application is to solve the problem that when the single machine test of the turbocharger unit is carried out, the flue gas generator inside the supercharged boiler is used to supply the rated temperature and flow rate of the flue gas to the marine turbocharger unit to ensure the normal work of the turbocharger unit. However, the simultaneous work of the two for experiment leads to large oil consumption, thereby causing the problem of resource waste. A test flue gas generator is proposed.

[0005] The test flue gas generator of the present application comprises a burner 1, an inner shell support 2, an inner shell 4, a refractory layer 5, an outer shell 6, a blocking ring 7, a first-stage air inlet 9, a second-stage air inlet 10, a third-stage air inlet 11, a fire observation 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. 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. The inner wall of the retaining ring 7 is in contact with the outer surface of the inner shell 4. A primary air inlet 9, two secondary air inlets 10 and a tertiary air inlet 11 are provided sequentially along the length direction on the outer surface of the outer shell 6. Three observation ports 12 are evenly provided along the length direction in the middle of the outer surface of the outer shell 6. An expansion joint is embedded inside each observation port 12. A high-temperature blue glass is embedded inside the expansion joint.

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

[0008] Furthermore, the outer surface of the outer shell 6 is provided with a heat insulation layer 8;

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

[0010] Furthermore, the axial section of the refractory brick layer 14 is circular, and 20 through holes are uniformly opened along the circumferential direction on the end face of the refractory brick layer 14.

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

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

[0013] Furthermore, the outer circumferential surface of the aforementioned primary mixing air duct is machined with five rows of ventilation holes, and each row has 20 holes.

[0014] Furthermore, the outer circumferential surface of the aforementioned secondary mixing air duct is machined with three rows of ventilation holes, and each row has 15 holes.

[0015] Furthermore, the inner diameter of the vent holes on both the primary mixing duct and the secondary mixing duct is 66mm.

[0016] Furthermore, a ventilation sleeve is fitted on the outer wall of the primary mixing air duct, and an air inlet is machined on the ventilation sleeve, with the axis of the air inlet forming a 45° angle with the horizontal line.

[0017] Further, in use, the smoke generator mainly consists of two parts of combustion and mixing, the combustion is carried out in the inner cylindrical hearth of the double-layer shell of the smoke generator, the air used for combustion enters the combustion chamber through the first air inlet with a diameter of , then enters the combustion chamber through the air regulator, and mixes with the fuel sprayed by the oil injector to burn; the inner shell, i.e. the combustion chamber, is composed of profiled refractory bricks with a thickness of 113 mm and a 40 mm thick insulation layer, the first mixing section is composed of rammed refractory concrete with a thickness of 113 mm and a 40 mm thick insulation layer, and the second mixing section is directly made of heat-resistant steel; the front wall of the inner shell and the first and second mixing sections are all provided with air inlets to allow air to enter the mixing; the annular air passage between the inner shell and the pressure-bearing outer shell of the smoke generator is entered by air from the second air inlet with a diameter of 2 , which can cool the inner shell and enter the combustion chamber to mix with the hot flue gas generated by combustion; the air entering through the small holes around the front wall refractory bricks can prevent the refractory bricks from burning out, but the temperature at the outlet of the combustion chamber should be controlled above 900 DEG C to stabilize the combustion; the air entering through the third air inlet with a diameter of performs secondary mixing with the flue gas at the outlet passage of the combustion chamber until the mixing is uniform and the required temperature of the flue gas turbine is reached. The cooling of the inner side of the pressure-bearing outer shell is ensured by the air entering through the air inlets, and the outer side is insulated by a 150 mm thick insulation layer.

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

[0019] The flow regulating valve is arranged between the air inlet pipe and the air inlet to distribute the air inlet amount of the first, second and third air inlets. The flue gas generated by burning 1.4 t / h of fuel is mixed twice to form new flue gas. The temperature and flow of the new flue gas can meet the use requirement of the turbine supercharger unit flue gas turbine at the maximum load. The mixed flue gas generated by the smoke generator burning 1.4 t / h of fuel is equivalent to the flue gas generated by the supercharged boiler burning 8-10 t / h of fuel. The smoke generator has variable working condition capability and can meet the test requirements of various working conditions of the turbine supercharger unit.

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

[0021] The present application overcomes the shortcomings of the prior art, when in use, the flow regulating valve is arranged between the air inlet pipeline and the air inlet, which can distribute the air inlet quantity of the primary air inlet, the secondary air inlet and the tertiary air inlet of the flue gas generator, the flue gas generated by burning 1.4t / h fuel oil is mixed twice to form new flue gas, the temperature and flow of the new flue gas can meet the use of the turbocharged unit flue gas turbine under the maximum load, 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 supercharged boiler, the flue gas generator has variable working condition capacity and can meet the test requirements of various working conditions of the turbocharged unit; thereby meeting the flue gas supply of the turbocharged unit, without using the flue gas generator in the supercharged boiler to supply the rated temperature and flow of the flue gas to the marine turbocharged unit, and using the flue gas generator with the structure can reduce the fuel consumption, further save resources and avoid waste of resources. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a main sectional view of a test flue gas generator according to the present application;

[0023] Figure 2 is an A-A sectional view of a test flue gas generator according to the present application;

[0024] Figure 3 is a schematic view of a test flue gas generator according to the present application in use;

[0025] Figure 4 is a main sectional view of an inner shell of a test flue gas generator according to the present application;

[0026] Figure 5 is a B-B sectional view of an inner shell of a test flue gas generator according to the present application. DETAILED DESCRIPTION

[0027] DETAILED DESCRIPTION Figures 1 to 5 The present embodiment is described, a test flue gas generator according to the present embodiment, which 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 observation port 12, a baffle 13 and a refractory brick layer 14.

[0028] The inner cavity of the shell 6 is provided with a burner 1 at one end, an inner shell support 2 in the middle, and an inner shell 4 on the inner shell support 2, and a layer of refractory layer 5 is arranged on the inner wall of the inner shell 4. The output end of the burner 1 is connected with the input end of the inner shell 4, and a baffle 13 is arranged at the connection position of the output end of the burner 1 and the input end of the inner shell 4. A layer of refractory bricks 14 is arranged between the side surface of the baffle 13 and the outer surface of the input end of the inner shell 4. The other end of the inner cavity of the shell 6 is provided with a check ring 7, and the inner wall of the check ring 7 is in contact with the outer surface of the inner shell 4. A primary air inlet 9, two secondary air inlets 10 and a tertiary air inlet 11 are sequentially arranged on the outer surface of the shell 6 along the length direction. Three fire observation holes 12 are uniformly arranged on the middle part of the outer surface of the shell 6 along the length direction. An expansion joint is embedded in each fire observation hole 12, and a high-temperature blue glass is embedded in the expansion joint.

[0029] In use, the smoke generator mainly consists of two parts of combustion and mixing. The combustion is carried out in the inner cylindrical hearth of the double-layer shell of the smoke generator. The air used for combustion enters the combustion chamber through the primary air inlet with a diameter of 2 mm, and then enters the combustion chamber through the air regulator, and is mixed with the fuel sprayed by the oil sprayer for combustion. The inner shell, i.e. the combustion chamber, is composed of profiled refractory bricks with a thickness of 113 mm and a 40 mm thick heat preservation layer. The first mixing section is composed of rammed refractory concrete with a thickness of 113 mm and a 40 mm thick heat preservation layer. The second mixing section is directly made of heat-resistant steel. Air inlets are opened on the front wall of the inner shell and the first and second mixing sections to allow air to enter the mixing. The annular air passage is formed between the inner shell and the pressure-bearing outer shell of the smoke generator. The air entering through the two secondary air inlets with a diameter of 2 mm can cool the inner shell, and at the same time, the air enters the combustion chamber and mixes with the hot flue gas generated by combustion. The air entering through the small holes around the front wall refractory bricks can prevent the refractory bricks from being damaged, but the temperature at the outlet of the combustion chamber should be controlled above 900 DEG C to stabilize the combustion. The air entering through the tertiary air inlet with a diameter of 2 mm is mixed with the flue gas at the outlet passage of the combustion chamber for the second time until the mixing is uniform and the required temperature of the flue gas turbine is reached. The air entering through the air inlets on the inner side of the pressure-bearing outer shell ensures the cooling of the inner side, and the outer side is insulated by a 150 mm thick heat insulation layer.

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

[0031] The flow regulating valve is arranged between the air inlet pipeline and the air inlet, and can distribute the air inlet flow of the first air inlet, the second air inlet and the third air inlet. The flue gas generated by burning 1.4t / h fuel oil is mixed twice to form new flue gas. The temperature and flow of the new flue gas can meet the use requirement of the flue gas turbine of the turbocharged unit under maximum load. The mixed flue gas generated by the flue gas generator burning 1.4t / h fuel oil is equivalent to the flue gas generated by the supercharged boiler burning 8-10t / h fuel oil. The flue gas generator has variable working condition capability and can meet the test requirement of various working conditions of the turbocharged unit.

[0032] Specific implementation method two: in combination with Figures 1 to 5 The present embodiment is a further limitation of the flue gas generator described in the first specific implementation method. The bottom of the shell 6 is uniformly provided with two shell supports 3 along the length direction.

[0033] Specific implementation method three: in combination with Figures 1 to 5 The present embodiment is a further limitation of the flue gas generator described in the second specific implementation method. The outer surface of the shell 6 is provided with a layer of thermal insulation layer 8.

[0034] Specific implementation method four: in combination with Figures 1 to 5 The present embodiment is a further limitation of the flue gas generator described in the third specific implementation method. 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.

[0035] In the present specific implementation method, the front head is connected with a flange connector pipe with a size of for connecting with the flange of the burner; the rear head is connected with a flange connector pipe with a size of for connecting with the air inlet pipeline of the flue gas turbine; the outer surface of the shell 6 is sequentially provided with a first air inlet 9, two second air inlets 10 and a third air inlet 11 along the length direction, and four air inlets are opened on the shell; a short pipe with a size of for the air burned by the burner to enter; two short pipes with a size of for the air cooled by the combustion chamber to enter; a short pipe with a size of for the air cooled by the outlet section of the combustion chamber to enter; on the lower side of the shell, a manhole with a size of 450X350 is provided for entering the interlayer space of the burner, and the burner can be disassembled and inspected.

[0036] Specific implementation method five: in combination with Figures 1 to 5The present embodiment is a further limitation of the smoke generator described in Embodiment One. The axial cross-section of the refractory brick layer 14 is circular, and 20 through holes are evenly arranged on the end surface of the refractory brick layer 14 in the circumferential direction.

[0037] In the present embodiment, 20 through holes are evenly arranged on the end surface of the refractory brick layer 14 in the circumferential direction to prevent the refractory brick layer 14 from being burnt out and prolong the service life.

[0038] Embodiment Six: in combination with Figures 1 to 5 The present embodiment is a further limitation of the smoke generator described in Embodiment Five. The inner diameter of the through hole on the end surface of the refractory brick layer 14 is 66 mm.

[0039] Embodiment Seven: in combination with Figures 1 to 5 The present embodiment is a further limitation of the smoke generator described in Embodiment One. The output end of the inner shell 4 is connected to one end of the primary air mixing tube, the other end of the primary air mixing tube is connected to one end of the secondary air mixing tube, and the other end of the secondary air mixing tube is in communication with the rear head of the outer shell 6.

[0040] Embodiment Eight: in combination with Figures 1 to 5 The present embodiment is a further limitation of the smoke generator described in Embodiment Seven. The circumferential outer surface of the primary air mixing tube is processed with five rows of ventilation holes, and each row has 20 holes; the circumferential outer surface of the secondary air mixing tube is processed with three rows of ventilation holes, and each row has 15 holes.

[0041] In the present embodiment, the circumferential outer surface of the primary air mixing tube is processed with five rows of ventilation holes, and each row has 20 holes to ensure primary air mixing of hot flue gas and air; in combination with the circumferential outer surface of the secondary air mixing tube being processed with three rows of ventilation holes, and each row has 15 holes to ensure secondary air mixing of hot flue gas and air.

[0042] Embodiment Nine: in combination with Figures 1 to 5 The present embodiment is a further limitation of the smoke generator described in Embodiment Eight. The inner diameter of the ventilation hole on the primary air mixing tube and the secondary air mixing tube is 66 mm.

[0043] Embodiment Ten: in combination with Figures 1 to 5The embodiment is a further limitation of the flue gas generator described in the ninth embodiment. The flue gas generator for testing has a ventilation sleeve on the outer wall of the primary air mixing tube, and the ventilation sleeve is provided with an air inlet hole. The axis of the air inlet hole forms a 45° angle with the horizontal line.

[0044] In this embodiment, the air inlet hole is provided on the ventilation sleeve, and the axis of the air inlet hole forms a 45° angle with the horizontal line, which ensures that the resistance is minimized and the flow rate is maximized when the air is mixed for the first time.

[0045] Working principle

[0046] In use, the flue gas generator mainly consists of a combustion and mixing part. 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 enters the combustion chamber through the first air inlet with a diameter of , then enters the combustion chamber through the air regulator, and mixes with the fuel sprayed by the oil injector for combustion. The inner shell, i.e. the combustion chamber, is composed of profiled refractory bricks with a thickness of 113 mm and a 40 mm thick insulation layer. The first mixing section is composed of castable refractory concrete with a thickness of 113 mm and a 40 mm thick insulation layer. The second mixing section is directly made of heat-resistant steel. The inner shell and the flue gas generator pressure-bearing outer shell form an annular air passage. The air entering through the second air inlet with a diameter of 2 can cool the inner shell, and at the same time, mix with the hot flue gas generated by combustion. The air entering through the small holes around the front wall of the refractory brick can prevent the refractory brick from burning out, but the temperature at the outlet of the combustion chamber should be controlled above 900°C to stabilize combustion. The air entering through the third air inlet with a diameter of undergoes secondary mixing with the flue gas at the outlet passage of the combustion chamber until the mixing is uniform and the temperature required by the flue gas turbine is reached. The cooling of the pressure-bearing outer shell is ensured by the air entering through the air inlets, and the outer side is insulated by a 150 mm thick insulation layer.

[0047] Fuel: The maximum rated fuel consumption of the flue gas generator is about 1.4 t / h, and the fuel is light diesel oil.

[0048] The flow regulating valve is provided between the air inlet and the air inlet, which can distribute the air flow of the first, second and third air inlets. The flue gas generated by burning 1.4 t / h of fuel forms new flue gas after two times of mixing. The temperature and flow rate of the new flue gas can meet the requirements of the flue gas turbine of the turbocharged unit under maximum load. The mixed flue gas generated by the flue gas generator with 1.4 t / h of fuel is equivalent to the flue gas generated by the flue gas generator with 8-10 t / h of fuel. The flue gas generator has variable working condition capability and can meet the test requirements of various working conditions of the turbocharged unit.

Claims

1. A test flue gas generator, characterized in that: It includes a burner (1), an inner shell support (2), an inner shell (4), a refractory layer (5), an outer shell (6), a baffle ring (7), a primary air inlet (9), a secondary air inlet (10), a tertiary air inlet (11), a 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). The output end of the burner (1) is connected to the 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 (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). The inner wall of the retaining ring (7) is in contact with the outer surface of the inner shell (4). A primary air inlet (9), two secondary air inlets (10) and a tertiary air inlet (11) are provided sequentially along the length of the outer surface of the outer shell (6). Three observation ports (12) are evenly provided along the length of the outer surface. Each observation port (12) is equipped with an expansion joint, and the expansion joint is equipped with high-temperature blue glass. The output end of the inner shell (4) is connected to one end of the primary mixing duct, and the other end of the primary mixing duct is connected to one end of the secondary mixing duct. The other end of the secondary mixing duct is connected to the rear end of the outer shell (6). Five rows of ventilation holes are machined on the outer circumference of the primary mixing duct, and each row has 20 holes. Three rows of ventilation holes are machined on the outer circumference of the secondary mixing duct, and each row has 15 holes. A ventilation sleeve is fitted on the outer wall of the primary mixing duct, and an air inlet is machined on the ventilation sleeve. The axis of the air inlet forms a 45° angle with the horizontal line.

2. The experimental flue gas generator according to claim 1, characterized in that: The bottom of the outer shell (6) is provided with two shell supports (3) evenly distributed along the length direction.

3. The experimental flue gas generator according to claim 2, characterized in that: The outer surface of the outer shell (6) is provided with a heat insulation layer (8).

4. The experimental flue gas generator according to claim 3, characterized in that: The outer shell (6) has a front end cap at one end and a rear end cap at the other end.

5. The experimental flue gas generator according to claim 1, characterized in that: The axial section of the refractory brick layer (14) is circular, and 20 through holes are uniformly opened along the circumferential direction on the end face of the refractory brick layer (14).

6. The experimental flue gas generator according to claim 5, characterized in that: The inner diameter of the through hole on the end face of the refractory brick layer (14) is 66mm.

7. The experimental flue gas generator according to claim 1, characterized in that: The inner diameter of the ventilation holes on both the primary mixing duct and the secondary mixing duct is 66mm.

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