Combustor with low-load stable combustion and high-temperature corrosion prevention effects

Abstract

The utility model discloses a combustor with low-load stable combustion and high-temperature corrosion prevention effects, which comprises a combustor casing. An AA secondary air pipe, an A primary air pipe, an AB oil secondary air pipe, a B primary thick air pipe, a BC oil secondary air pipe, a C primary air pipe, a CD secondary air pipe, a D primary air pipe, a DE oil secondary air pipe, an E primary air pipe, an EE secondary air pipe, a B primary thin air pipe and an air outlet device are sequentially and fixedly installed at the bottom of the inner wall of the combustor shell from top to bottom. According to the combustor with the low-load stable combustion and high-temperature corrosion prevention effects, the combustor body of the layer B is divided into a thick layer B and a thin layer B from an original layer, nozzles of all the combustors are designed to be of a deflection structure, and therefore the low-load stable combustion and high-temperature corrosion prevention effects are achieved. The minimum stable combustion load of the boiler is 25% of BMCR load, the effects of slagging and high-temperature corrosion inhibition during medium and high loads are effectively prevented, and the corrosion rate is smaller than or equal to 0.4 mm / year.

Description

TECHNICAL FIELD

[0001] The utility model relates to a burner technical field, concretely is a kind of burner with low load stable combustion and high temperature corrosion prevention effect. BACKGROUND

[0002] The main role of boiler burner is to realize high-efficiency combustion, stable flame form and reduce pollutant emission by accurately controlling the mixing ratio of fuel and air and combustion process, and the specific role can be summarized as the following core functions: mixing coal powder, fuel gas and other fuels with primary air / secondary air according to proportion, forming uniform combustible mixture through atomizing nozzle or cyclone device, using cyclone type or straight-flow type structure (such as cyclone burner, straight-flow burner), strengthening turbulent mixing through air power field design, improving combustion efficiency, forming high-temperature backflow area near the nozzle through precombustion chamber, bluff body and other structures (such as bluff body burner), absorbing hot flue gas in furnace to provide heat source for fuel ignition, using staged combustion or thick-thin separation technology (such as thick-thin burner), forming local high temperature in high concentration area, shortening ignition distance and enhancing combustion stability, adjusting primary air / secondary air ratio, damper opening and fuel supply to flexibly respond to boiler load change and different coal requirements, such as hot primary air for preheating coal powder, cold primary air for adjusting mixing temperature and optimizing thermal efficiency.

[0003] However, the traditional burner has the following disadvantages:

[0004] Traditional burner will appear slagging after material combustion when it is in high load in boiler, which affects the use of subsequent boiler. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of burner with low load stable combustion and high temperature corrosion prevention effect to solve the problem that traditional burner will appear slagging after material combustion when it is in high load in boiler in the above background technology, which affects the use of subsequent boiler.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a combustor with low load stable combustion and high temperature corrosion prevention effect, combustor casing is fixedly installed with AA secondary air pipe, A primary air pipe, AB oil secondary air pipe, B primary dense air pipe, BC oil secondary air pipe, C primary air pipe, CD secondary air pipe, D primary air pipe, DE oil secondary air pipe, E primary air pipe, EE secondary air pipe, B primary light air pipe and air outlet device from top to bottom in succession on the bottom of combustor casing, the surface of AA secondary air pipe, the surface of A primary air pipe, the surface of AB oil secondary air pipe, the surface of B primary dense air pipe, the surface of BC oil secondary air pipe, the surface of C primary air pipe, the surface of CD secondary air pipe, the surface of D primary air pipe, the surface of DE oil secondary air pipe, the surface of E primary air pipe, the surface of EE secondary air pipe, the surface of B primary light air pipe and the surface of air outlet device are all provided with a plurality of spouts, and the bottom end of combustor casing inner wall is fixedly installed with ignition assembly.

[0007] Preferably, one side of a plurality of spouts is provided with a deflection port.

[0008] Preferably, the ignition assembly comprises a displacement pipeline and an ignition platform, the top end of the displacement pipeline is fixedly installed with the ignition platform, and the top end of the ignition platform is fixedly installed with an igniter.

[0009] Preferably, a flame stabilizer is fixedly installed at the connection between the ignition platform and the igniter, and the installation of the flame stabilizer ensures that the igniter normally performs ignition operation.

[0010] Preferably, one end of the displacement pipeline is fixedly communicated with a connecting hose extending to the outside, and the gas required for ignition is injected into the displacement pipeline through the connecting hose.

[0011] Preferably, one side of the displacement pipeline is provided with a lead screw, the other side of the displacement pipeline is provided with a sliding frame, the middle part of the lead screw is threadedly connected with a first sliding block, the middle part of the sliding frame is slidably connected with a second sliding block, one end of the first sliding block and one end of the second sliding block are fixedly connected with the middle part of the displacement pipeline on both sides respectively, one end of the lead screw is rotatably connected with the combustor casing, one end of the sliding frame is fixedly connected with the combustor casing, and a handle is fixedly installed on the surface of the lead screw, the user rotates the handle, the handle drives the lead screw to rotate, the threads on the surface of the lead screw and the threads in the inner wall of the first sliding block are matched with each other, the first sliding block is limited by the displacement pipeline, so the first sliding block slides relative to the lead screw, and the position of the displacement pipeline relative to the combustor casing is adjusted.

[0012] Preferably, the middle part of the displacement pipeline is slidably connected with the combustor casing, and the ignition assembly is installed on the combustor casing through the displacement pipeline.

[0013] Compared with the prior art, the beneficial effects of the utility model are that: the B layer burner in the burner is divided into B thick and B light two layers from the original one layer, all burner nozzles are designed as skew structures, thereby reducing the tangential effect: realizing the 25% BMCR load of the lowest stable combustion load of the boiler, effectively preventing slagging at medium and high loads, inhibiting the effect of high temperature corrosion, and the corrosion rate is ≤0.4mm / year. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is a side view of the utility model;

[0015] Fig. 2 is a connection diagram of the burner casing and the ignition assembly of the utility model.

[0016] In the figure: 1, burner casing; 2, AA secondary air pipe; 3, A primary air pipe; 4, AB oil secondary air pipe; 5, B primary thick air pipe; 6, BC oil secondary air pipe; 7, C primary air pipe; 8, CD secondary air pipe; 9, D primary air pipe; 10, DE oil secondary air pipe; 11, E primary air pipe; 12, EE secondary air pipe; 13, B primary light air pipe; 14, air outlet device; 15, nozzle; 16, skew port; 17, ignition assembly; 1701, igniter; 1702, flame stabilizer; 1703, ignition platform; 1704, displacement pipeline; 1705, connecting hose; 1706, lead screw; 1707, second sliding block; 1708, sliding frame; 1709, first sliding block; 1710, handle. DETAILED DESCRIPTION

[0017] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the accompanying drawings in the utility model embodiment.

[0018] Please refer to Figs. 1-2The utility model provides a kind of combustor with low load combustion stabilization and high temperature corrosion prevention effect, including combustor casing 1, the bottom of combustor casing 1 inner wall is successively fixed from top to bottom Installation has AA secondary air pipe 2, A primary air pipe 3, AB oil secondary air pipe 4, B primary dense air pipe 5, BC oil secondary air pipe 6, C primary air pipe 7, CD secondary air pipe 8, D primary air pipe 9, DE oil secondary air pipe 10, E primary air pipe 11, EE secondary air pipe 12, B primary light air pipe 13 and air outlet 14, the surface of AA secondary air pipe 2, the surface of A primary air pipe 3, the surface of AB oil secondary air pipe 4, the surface of B primary dense air pipe 5, the surface of BC oil secondary air pipe 6, the surface of C primary air pipe 7, the surface of CD secondary air pipe 8, the surface of D primary air pipe 9, the surface of DE oil secondary air pipe 10, the surface of E primary air pipe 11, the surface of EE secondary air pipe 12, the surface of B primary light air pipe 13 and the surface of air outlet 14 are all set with several spouts 15, and the bottom end of combustor casing 1 inner wall is fixedly installed with ignition assembly 17.

[0019] The side of several spouts 15 is all set with skew gate 16.

[0020] Ignition assembly 17 includes displacement pipeline 1704 and ignition platform 1703, and the top end of displacement pipeline 1704 is fixedly installed with ignition platform 1703, and the top end of ignition platform 1703 is fixedly installed with igniter 1701.

[0021] Ignition platform 1703 and the connecting place of igniter 1701 are fixedly installed with flame stabilizer 1702, and the installation of flame stabilizer 1702 guarantees that igniter 1701 normally carries out ignition operation.

[0022] One end of displacement pipeline 1704 is fixedly communicated with connecting hose 1705 extending to outside, and the gas required by ignition is injected into displacement pipeline 1704 through connecting hose 1705.

[0023] One side of the displacement pipeline 1704 is provided with a lead screw 1706, the other side of the displacement pipeline 1704 is provided with a sliding frame 1708, the middle part of the lead screw 1706 is threadedly connected with a first sliding block 1709, the middle part of the sliding frame 1708 is slidably connected with a second sliding block 1707, one end of the first sliding block 1709 and one end of the second sliding block 1707 are fixedly connected with the middle part of the two sides of the displacement pipeline 1704 respectively, one end of the lead screw 1706 is rotatably connected with the burner casing 1, one end of the sliding frame 1708 is fixedly connected with the burner casing 1, a handle 1710 is fixedly installed on the surface of the lead screw 1706, a user rotates the handle 1710, the handle 1710 drives the lead screw 1706 to rotate, the threads on the surface of the lead screw 1706 and the threads on the inner wall of the first sliding block 1709 are matched with each other, the first sliding block 1709 is limited by the displacement pipeline 1704, so the first sliding block 1709 slides relative to the lead screw 1706, the position of the displacement pipeline 1704 relative to the burner casing 1 is adjusted.

[0024] The middle part of the displacement pipeline 1704 is slidably connected with the burner casing 1, the ignition assembly 17 is installed on the burner casing 1 through the displacement pipeline 1704.

[0025] In use, the user rotates the handle 1710, the handle 1710 drives the lead screw 1706 to rotate, the threads on the surface of the lead screw 1706 and the threads on the inner wall of the first sliding block 1709 are matched with each other, the first sliding block 1709 is limited by the displacement pipeline 1704, so the first sliding block 1709 slides relative to the lead screw 1706, the position of the displacement pipeline 1704 relative to the burner casing 1 is adjusted, the gas required for ignition is injected into the displacement pipeline 1704 through the connecting hose 1705, the installation of the flame stabilizer 1702 ensures that the igniter 1701 normally performs the ignition operation, all the burner nozzles 15 are designed as deflected nozzles 16, so that the tangential effect is reduced.

[0026] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A burner with low-load stable combustion and high-temperature corrosion resistance, comprising a burner housing (1), characterized in that: The bottom of the inner wall of the burner housing (1) is fixedly installed from top to bottom with the following components: AA secondary air duct (2), A primary air duct (3), AB oil secondary air duct (4), B primary rich air duct (5), BC oil secondary air duct (6), C primary air duct (7), CD secondary air duct (8), D primary air duct (9), DE oil secondary air duct (10), E primary air duct (11), EE secondary air duct (12), B primary lean air duct (13), and an air outlet (14). The surfaces of the AA secondary air duct (2), A primary air duct (3), and A... The surfaces of the B oil secondary air duct (4), the B primary rich air duct (5), the BC oil secondary air duct (6), the C primary air duct (7), the CD secondary air duct (8), the D primary air duct (9), the DE oil secondary air duct (10), the E primary air duct (11), the EE secondary air duct (12), the B primary lean air duct (13), and the air outlet (14) are all provided with several nozzles (15). An ignition assembly (17) is fixedly installed at the bottom of the inner wall of the burner housing (1).

2. The burner with low-load stable combustion and high-temperature corrosion resistance as described in claim 1, characterized in that: A deflection port (16) is provided on one side of each of the nozzles (15).

3. A burner with low-load stable combustion and high-temperature corrosion resistance as described in claim 1, characterized in that: The ignition assembly (17) includes a displacement pipe (1704) and an ignition platform (1703). The ignition platform (1703) is fixedly installed at the top end of the displacement pipe (1704), and an igniter (1701) is fixedly installed at the top end of the ignition platform (1703).

4. A burner with low-load stable combustion and high-temperature corrosion resistance as described in claim 3, characterized in that: A flame stabilizer (1702) is fixedly installed at the connection between the ignition platform (1703) and the igniter (1701).

5. A burner with low-load stable combustion and high-temperature corrosion resistance as described in claim 3, characterized in that: One end of the displacement pipe (1704) is fixedly connected to a connecting hose (1705) extending to the outside.

6. A burner with low-load stable combustion and high-temperature corrosion resistance as described in claim 3, characterized in that: A lead screw (1706) is provided on one side of the displacement pipe (1704), and a sliding frame (1708) is provided on the other side of the displacement pipe (1704). A first sliding block (1709) is threadedly connected to the middle of the lead screw (1706), and a second sliding block (1707) is slidably connected to the middle of the sliding frame (1708). One end of the first sliding block (1709) and one end of the second sliding block (1707) are respectively fixedly connected to the middle of both sides of the displacement pipe (1704). One end of the lead screw (1706) is rotatably connected to the burner housing (1), and one end of the sliding frame (1708) is fixedly connected to the burner housing (1). A handle (1710) is fixedly installed on the surface of the lead screw (1706).

7. A burner with low-load stable combustion and high-temperature corrosion resistance as described in claim 3, characterized in that: The middle part of the displacement pipe (1704) is slidably connected to the burner housing (1).

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