Porous jet flow combustion type small non-premixing combustor

Abstract

The utility model relates to the technical field of combustors, in particular to a porous jet flow combustion type small non-premixing combustor. The lower partition plate is used for dividing an inner cavity of the spray head into an oxygen inlet cavity and a fuel gas inlet cavity. The gas inlet cavity is communicated with a gas spray pipe; the oxygen inlet cavity is connected with an oxygen spraying pipe; a plurality of oxygen outlet connecting hole groups and a plurality of fuel gas outlet connecting hole groups are formed in the end surface of the spray head; the fuel gas outlet connecting hole group is arranged between two adjacent oxygen outlet connecting hole groups; and a gas passing pipe for communicating the gas outlet connecting hole group with the gas inlet cavity is arranged in an inner cavity of the oxygen inlet cavity. When the gas nozzle is used, gas and combustion-supporting gas are separated in the nozzle body through the lower partition plate and the gas passing pipe respectively, the oxygen outlet connecting hole sets are arranged on the two sides of the gas outlet connecting hole set, combustion of the gas is more sufficient, and the combustion heat efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to burner technical field, in particular to a kind of porous jet combustion formula small non-premixed combustor. BACKGROUND

[0002] Non-premixed combustion refers to the combustion mode that fuel and oxidant are not premixed before combustion, but gradually mixed and reacted by diffusion or turbulent flow during combustion.

[0003] Its advantage is to avoid the risk of backfire, because fuel and oxidant are not premixed, so there is no danger of flame flashback to the fuel supply system, which is generally the main defect of premixed combustion. In addition, non-premixed combustion has wide fuel adaptability, and can be applied to complex fuel conditions such as low calorific value gas, liquid fuel and even solid particle fuel. Moreover, the mixing rate of non-premixed combustion is controllable, and the position and form of flame are more easily adjusted.

[0004] In the structure of the existing non-premixed combustor, the mixing between the fuel gas and the combustion-supporting gas is not uniform, which can cause the formation of high-temperature zones in local areas, and the local areas are not fully combusted, forming carbon smoke particles, and the thermal efficiency of combustion cannot be guaranteed. SUMMARY

[0005] The utility model discloses a kind of porous jet combustion formula small non-premixed combustor to the defects and deficiencies of prior art.

[0006] To achieve the above object, the utility model employs the technical scheme that

[0007] The utility model discloses a kind of porous jet combustion formula small non-premixed combustor, including spray head;The inside of the spray head is provided with lower baffle;The lower baffle is used to separate the inner cavity of spray head into oxygen inlet cavity and fuel gas inlet cavity;The fuel gas inlet cavity is connected with gas jet pipe;Oxygen jet pipe is connected on the oxygen inlet cavity;The end surface of the spray head is provided with multiple oxygen outlet hole groups and multiple fuel gas outlet hole groups;The fuel gas outlet hole group is arranged between adjacent two oxygen outlet hole groups;The inner cavity of the oxygen inlet cavity is provided with the overburning gas pipe that the fuel gas outlet hole group is connected with fuel gas inlet cavity.

[0008] Further, the oxygen outlet hole group is composed of multiple oxygen outlet holes;The oxygen outlet hole on the same oxygen outlet hole group is circumferentially distributed on the spray head;The fuel gas outlet hole group is composed of multiple fuel gas outlet holes;The fuel gas outlet hole on the same fuel gas outlet hole group is circumferentially distributed on the spray head;Oxygen outlet hole group and fuel gas outlet hole are coaxially arranged.

[0009] Further, the shell of the spray head, lower baffle and overburning gas pipe are integrally printed.

[0010] Further, the bottom of the spray head is provided with a gas inlet interface communicated with the gas inlet cavity; the gas inlet interface is communicated with the gas spray pipe; the sidewall of the spray head is uniformly provided with a plurality of oxygen inlet interfaces communicated with the oxygen inlet cavity; the oxygen inlet interfaces are circumferentially distributed on the spray head; the oxygen inlet interfaces are communicated with connectors; the oxygen spray pipe is connected to the connector.

[0011] Further, the number of the oxygen inlet interfaces is at least two; the number of the connectors and the number of the oxygen spray pipes are equal to the number of the oxygen inlet interfaces.

[0012] Further, the fixed seat is further included; the fixed seat is composed of two clamping plates and a connecting piece for locking and fixing the two clamping plates; the oxygen spray pipe and the gas spray pipe are arranged between the two clamping plates.

[0013] After the above structure is adopted, the beneficial effects of the utility model are as follows: the gas enters the inner cavity of the gas inlet cavity through the gas spray pipe, and the combustion-supporting gas enters the inside of the oxygen inlet cavity; then the combustion-supporting gas is sprayed out from the oxygen outlet hole group, and the gas enters the over-combustion gas pipe through the gas inlet hole and is sprayed out from the gas outlet hole group, and the gas and the combustion-supporting gas are mixed and combusted outside the spray head; the gas and the combustion-supporting gas are separated in the spray head through the lower partition plate and the over-combustion gas pipe, and the oxygen outlet hole group is arranged on both sides of the gas outlet hole group, so that the combustion of the gas is more sufficient, and the heat efficiency of the combustion is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

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

[0015] Fig. 2 is the bottom view of the utility model;

[0016] Fig. 3 is the first view angle sectional view of the spray head;

[0017] Fig. 4 is the second view angle sectional view of the spray head;

[0018] BRIEF DESCRIPTION OF DRAWINGS

[0019] 1, spray head; 101, lower partition plate; 10101, gas inlet hole; 102, oxygen inlet cavity;

[0020] 10201, oxygen inlet interface; 103, oxygen outlet hole; 104, gas outlet hole;

[0021] 105, over-combustion gas pipe; 106, gas inlet cavity; 107, gas inlet interface; 2, connector;

[0022] 3, oxygen spray pipe; 4, gas spray pipe; 5, clamping plate; 6, connecting piece. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figs. 1 to 4 As shown, the present invention discloses a multi-hole jet combustion type small non-premixed burner, comprising a nozzle 1; a lower partition 101 is provided inside the nozzle 1; the lower partition 101 is used to divide the inner cavity of the nozzle 1 into an oxygen inlet chamber 102 and a gas inlet chamber 106; the gas inlet chamber 106 is connected to a gas injection pipe 4; an oxygen injection pipe 3 is connected to the oxygen inlet chamber 102; multiple sets of oxygen outlet holes and multiple sets of gas outlet holes are provided on the end face of the nozzle 1; the gas outlet holes are arranged between two adjacent sets of oxygen outlet holes; a gas passage pipe 105 is provided in the inner cavity of the oxygen inlet chamber 102 to connect the gas outlet holes to the gas inlet chamber 106.

[0025] The lower partition 101 is provided with a gas inlet hole 10101 at the position corresponding to the gas pipe 105;

[0026] The gas enters the inner cavity of the gas inlet chamber 106 from the gas nozzle 4, and the combustion-supporting gas enters the interior of the oxygen inlet chamber 102 at the same time; then the combustion-supporting gas is ejected from the oxygen outlet port group, and the gas enters the gas pipe 105 from the gas inlet port 10101 and is ejected from the gas outlet port group, where they mix and burn outside the nozzle 1.

[0027] The combustion gas and the combustion-supporting gas are separated in the nozzle 1 by the lower baffle 101 and the gas passage pipe 105, and oxygen outlet ports are provided on both sides of the gas outlet port group, so that the combustion of the gas is more complete and the thermal efficiency of the combustion is guaranteed.

[0028] In a preferred embodiment of this utility model, the oxygen inlet group consists of a plurality of oxygen outlet inlets 103; the oxygen outlet inlets 103 on the same group of oxygen inlets are circumferentially distributed on the nozzle 1; the gas outlet inlet group consists of a plurality of gas outlet holes 104; the gas outlet holes 104 on the same group of gas outlet inlets are circumferentially distributed on the nozzle 1; the oxygen inlet group and the gas outlet holes are coaxially arranged.

[0029] The oxygen inlet assembly and the gas outlet inlet assembly are coaxially arranged, and oxygen inlet assemblies are provided on both the inner and outer sides of the gas outlet inlet assembly, which makes the combustion more complete and the heat generated by the combustion more even.

[0030] In a preferred embodiment of this utility model, the outer shell, lower partition 101, and gas passage pipe 105 of the nozzle 1 are integrally printed.

[0031] The entire outer frame and internal structure of the nozzle 1 are integrally formed by metal 3D printing, reducing the number of parts; the remaining holes are formed by electrical discharge machining; this ensures the sealing between the oxygen inlet chamber 102 and the gas inlet chamber 106. Even when the nozzle 1 expands at high temperature, there will still be no gas leakage between the oxygen inlet chamber 102 and the gas inlet chamber 106, which can guarantee the sealing effect and reduce safety hazards.

[0032] In a preferred embodiment of this utility model, the bottom of the nozzle 1 is provided with a gas inlet interface 107 that communicates with the gas inlet chamber 106; the gas inlet interface 107 is connected to the gas spray pipe 4; a plurality of oxygen inlet interfaces 10201 that communicate with the oxygen inlet chamber 102 are evenly distributed on the side wall of the nozzle 1; the oxygen inlet interfaces 10201 are circumferentially distributed on the nozzle 1; each oxygen inlet interface 10201 is connected to a connector 2; the oxygen spray pipe 3 is connected to the connector 2;

[0033] The circumferentially distributed oxygen inlet ports 10201 allow the gas from each oxygen nozzle 3 to enter the oxygen inlet chamber 102 evenly, ensuring consistent oxygen output at each position of the oxygen outlet port group and resulting in more complete combustion.

[0034] In a preferred embodiment of this utility model, the number of oxygen inlet ports 10201 is at least two; the number of connectors 2 and oxygen nozzles 3 are equal to the number of oxygen inlet ports 10201; the number of oxygen inlet ports 10201 can be two, three, four, five, six, etc.

[0035] As a preferred embodiment of this utility model, it also includes a fixing base; the fixing base consists of two clamping plates 5 and a connecting piece 6 that locks and fixes the two clamping plates 5; the oxygen nozzle 3 and the gas nozzle 4 are both disposed between the two clamping plates 5;

[0036] The surface of the clamping plate 5 is provided with positioning grooves for positioning the oxygen nozzle 3 and the gas nozzle 4. The oxygen nozzle 3 and the gas nozzle 4 are positioned and fixed together by the two clamping plates 5. The connecting part 6 is a bolt. One clamping plate 5 is provided with a through hole and the other clamping plate 5 is provided with a threaded hole. The bolt passes through the through hole and is threaded into the threaded hole to fix the two clamping plates 5.

[0037] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A small, non-premixed burner with porous jet combustion, characterized in that: The device includes a nozzle (1); a lower partition (101) is provided inside the nozzle (1); the lower partition (101) is used to divide the inner cavity of the nozzle (1) into an oxygen inlet cavity (102) and a gas inlet cavity (106); the gas inlet cavity (106) is connected to a gas nozzle pipe (4); an oxygen nozzle pipe (3) is connected to the oxygen inlet cavity (102); the end face of the nozzle (1) is provided with multiple sets of oxygen outlet holes and multiple sets of gas outlet holes; the gas outlet holes are arranged between two adjacent sets of oxygen outlet holes; the inner cavity of the oxygen inlet cavity (102) is provided with a gas pipe (105) that connects the gas outlet holes to the gas inlet cavity (106).

2. The porous jet combustion type small non-premixed burner according to claim 1, characterized in that: The oxygen inlet group consists of multiple oxygen outlet inlets (103); the oxygen outlet inlets (103) on the same oxygen inlet group are circumferentially distributed on the nozzle (1); the gas outlet inlet group consists of multiple gas outlet holes (104); the gas outlet holes (104) on the same gas outlet inlet group are circumferentially distributed on the nozzle (1); the oxygen inlet group and the gas outlet holes are coaxially arranged.

3. A porous jet combustion type small non-premixed burner according to claim 1, characterized in that: The outer shell, lower partition (101), and gas pipe (105) of the nozzle (1) are integrally printed.

4. A porous jet combustion type small non-premixed burner according to claim 1, characterized in that: The nozzle (1) has a gas inlet port (107) at its bottom that is connected to the gas inlet chamber (106); the gas inlet port (107) is connected to the gas nozzle (4); the nozzle (1) has multiple oxygen inlet ports (10201) that are connected to the oxygen inlet chamber (102) evenly distributed on its side wall; the oxygen inlet ports (10201) are circumferentially distributed on the nozzle (1); each oxygen inlet port (10201) is connected to a connector (2); the oxygen nozzle (3) is connected to the connector (2).

5. A porous jet combustion type small non-premixed burner according to claim 4, characterized in that: The number of oxygen inlet ports (10201) is at least two; the number of connectors (2) and oxygen nozzles (3) are equal to the number of oxygen inlet ports (10201).

6. A porous jet combustion type small non-premixed burner according to claim 4, characterized in that: It also includes a fixing seat; the fixing seat consists of two clamping plates (5) and a connector (6) that locks the two clamping plates (5) together; the oxygen nozzle (3) and the gas nozzle (4) are both located between the two clamping plates (5).

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