Testing device for nested injection of air and steam

Abstract

The utility model discloses an air and steam nested injection test device, which comprises an air injection pipe and a steam injection pipe, the steam injection pipe is nested in the air injection pipe, and the input end of the air injection pipe is connected with a centrifugal fan through an air conveying assembly. The input end of the centrifugal fan is connected with a colored smoke generating structure, and the input end of the steam injection pipe is connected with a steam generator through a steam conveying assembly. According to the invention, the steam injection pipe is nested in the air injection pipe to form the nested pipeline, and during the injection test, under the action of the steam generator and the steam conveying assembly, high-temperature steam is injected into the air injection pipe, so that the steam and air are mixed in the nested pipeline, and the steam injection test is completed. And then under the action of the centrifugal fan and the air conveying assembly, the mixed air and high-temperature steam are uniformly accelerated to be jetted into the hearth, so that the effect of enhancing combustion can be achieved, and the penetrating power can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste incinerator injection equipment, in particular to a test device for air and steam nested injection. BACKGROUND

[0002] Currently, multiple media are usually required to be supplied into the waste incinerator to achieve the purpose of auxiliary combustion or reducing the concentration of pollutants. Among them, air and process water are commonly used. The former can be sent into the furnace through the primary and secondary air pipes in the incinerator by pressurization. The latter can be used as a carrier to spray into the furnace after being atomized with ammonia water, urea, lime, etc. to achieve the purpose of removing pollutants. However, the penetration effect of these two media in the furnace is limited even under pressurized conditions, and the medium and flue gas in the furnace cannot be fully contacted and mixed, thereby increasing the emission of pollutants.

[0003] In related technologies, the boiler system matched with the waste incineration plant can generate a large amount of high-pressure steam. The steam is used as a carrier to send the medium into the furnace, which can preheat the medium (as shown in Chinese patent application No. CN112460566A) and provide sufficient kinetic energy for the medium to achieve the effect of strengthening combustion (as shown in Chinese patent application No. CN111256152A). However, these technologies need to be verified by injection outside the furnace before implementation, thereby providing sufficient data support for the construction or modification of the furnace.

[0004] The injection device in related technologies is usually single steam injection or air injection, and does not include a device for mixing steam and air. At the same time, single air injection sends compressed air into the furnace to assist combustion, which has insufficient penetration ability, resulting in insufficient waste incineration. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a test device for air and steam nested injection to solve the problem that the injection device in related technologies is usually single steam injection or air injection, and does not include a device for mixing steam and air. At the same time, single air injection sends compressed air into the furnace to assist combustion, which has insufficient penetration ability, resulting in insufficient waste incineration.

[0006] The test device for air and steam nested injection provided by the present application adopts the following technical solution:

[0007] A test device for air and steam nested injection, comprising an air injection pipe and a steam injection pipe, the steam injection pipe is nested in the inside of the air injection pipe, the input end of the air injection pipe is connected with a centrifugal fan through an air conveying assembly, the input end of the centrifugal fan is connected with a color smoke generating structure, and the input end of the steam injection pipe is connected with a steam generator through a steam conveying assembly.

[0008] Further, the air conveying assembly comprises a flexible pipe arranged at the output end of the centrifugal fan, one end of the flexible pipe is connected with an air conveying pipe through a mounting head, and the air conveying pipe is connected with the input end of the air injection pipe through a connecting piece.

[0009] Further, the air conveying pipe is further provided with a first pressure gauge, a clamp type butterfly valve and a first flow meter.

[0010] Further, the steam conveying assembly comprises a steam conveying pipe connected with the output end of the steam generator, one end of the steam conveying pipe is connected with the input end of the steam injection pipe, and the steam conveying pipe is provided with a second pressure gauge, a ball valve, a second flow meter and a pipe compensator.

[0011] Further, the steam conveying pipe is further provided with an insulating layer.

[0012] Further, the steam generator is connected with a gasifier device through a pipe, the gasifier device is connected with external liquefied petroleum gas, and one end of the steam generator is further connected with a water storage tank through a pipe.

[0013] Further, the bottom of the centrifugal fan is provided with a movable trolley bottom plate, and the bottom of the movable trolley bottom plate is provided with a plurality of trolley wheels.

[0014] Further, a bearing rod is arranged on one side of the top of the movable trolley bottom plate through a fixing piece, and the bearing rod is matched with the air conveying pipe.

[0015] Compared with the prior art, the beneficial effects of the present application are that the steam injection pipe is nested and arranged in the inside of the air injection pipe to form a nested pipe, when the injection test is carried out, under the action of the steam generator and the steam conveying assembly, high-temperature steam is injected into the inside of the air injection pipe, so that the steam and the air are mixed in the inside of the nested pipe, and then under the action of the centrifugal fan and the air conveying assembly, the mixed air and high-temperature steam are uniformly accelerated and injected into the hearth, so that the effect of strengthening combustion and improving the penetration ability can be achieved.

[0016] The present application also sends the colored smoke to the centrifugal fan through the color smoke emitting structure, under the action of the centrifugal fan, the mixed gas is dyed, and then the dyed mixed gas is injected into the atmospheric environment, so that the dyed mixed gas can be conveniently photographed and observed, and the injection test of the mixed gas can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1is a structural schematic diagram of a test device for air and steam nested injection according to an embodiment of the present application.

[0018] Figure 2 is a structural schematic diagram of a centrifugal fan, an air delivery assembly, and a mobile trolley base plate.

[0019] Figure 3 is a structural schematic diagram of a steam generator and a steam delivery assembly.

[0020] Legend:

[0021] 1, air injection pipe; 2, steam injection pipe; 3, centrifugal fan; 31, flexible pipe; 32, mounting head; 33, air delivery pipeline; 34, first pressure gauge; 35, clamp type butterfly valve; 36, first flow meter; 4, color smoke structure; 5, steam generator; 51, steam delivery pipeline; 52, second pressure gauge; 53, ball valve; 54, second flow meter; 55, pipeline compensator; 6, gasifier device; 7, liquefied petroleum gas; 8, water storage tank; 9, mobile trolley base plate; 91, trolley wheel; 92, bearing rod. DETAILED DESCRIPTION

[0022] The following will be described in detail with reference to the accompanying drawings. Figures 1-3 The present application will be further described in detail.

[0023] The present application discloses a test device for air and steam nested injection, referring to Figure 1 In the present embodiment, the test device comprises an air injection pipe 1, a steam injection pipe 2, a centrifugal fan 3, an air delivery assembly, a steam generator 5, a steam delivery assembly, and a color smoke structure 4. The steam injection pipe 2 is nested at one end inside the air injection pipe 1, and the other end of the steam injection pipe 2 penetrates the outer wall of the air injection pipe 1. In this way, the steam injection pipe 2 is nested inside the air injection pipe 1 to form a nested pipeline.

[0024] Meanwhile, the output end of the centrifugal fan 3 is connected to the input end of the air injection pipe 1 through the air delivery assembly, and the centrifugal fan 3 can deliver compressed air along the air delivery assembly to the air injection pipe 1. The output end of the steam generator 5 is connected to the input end of the steam injection pipe 2 through the steam delivery assembly, and the input end of the steam generator 5 is connected to the gasifier device 6 through a pipeline. The gasifier device 6 is connected to the liquefied petroleum gas 7 outside to supply liquefied gas to the steam generator 5.

[0025] Meanwhile, the steam generator 5 is also connected with a water storage tank 8 at one end through a pipeline, the water storage tank 8 stores water, and the water in the water storage tank 8 can be discharged into the steam generator 5, the steam generator 5 uses liquefied gas to heat the water into high-temperature steam, and the high-temperature steam is sent into the steam injection pipe 2 along the steam delivery assembly, so that the high-temperature steam and the compressed air are mixed in the inside of the nested pipeline, and finally the mixed high-temperature steam and compressed air are simultaneously injected into the atmosphere under the action of the centrifugal fan 3.

[0026] The structure of the air delivery assembly and the steam delivery assembly will be described in detail below:

[0027] Specifically, referring to Figure 1 and Figure 2 , in this embodiment, the air delivery assembly includes a flexible pipe 31, an air delivery pipeline 33, and a mounting head 32. One end of the flexible pipe 31 is connected to the output end of the centrifugal fan 3; one end of the air delivery pipeline 33 is fixedly installed on the end of the flexible pipe 31 away from the centrifugal fan 3 through the mounting head 32, and the other end of the air delivery pipeline 33 is fixedly connected with the input end of the air injection pipe 1 through a connecting piece.

[0028] More specifically, the connecting piece is a connecting structure in which a flange, a bolt, and a nut cooperate with each other, and can tightly and sealingly connect the air delivery pipeline 33 and the air injection pipe 1 with each other. When the centrifugal fan 3 is started, the compressed air can enter into the air delivery pipeline 33 along the flexible pipe 31, and then be uniformly delivered into the inside of the air injection pipe 1 along the air delivery pipeline 33.

[0029] Preferably, referring to Figure 2 , in this embodiment, a first pressure gauge 34, a clamp-type butterfly valve 35, and a first flowmeter 36 are sequentially installed on the air delivery pipeline 33; in this way, by arranging the first pressure gauge 34 and the first flowmeter 36, the flow of the gas can be monitored in real time; and the arrangement of the clamp-type butterfly valve 35 can effectively control the air parameters.

[0030] In addition, referring to Figure 2 , in this embodiment, a mobile trolley bottom plate 9 is also installed at the bottom of the centrifugal fan 3, and a plurality of trolley wheels 91 are installed around the bottom of the mobile trolley bottom plate 9; through the cooperation of the mobile trolley bottom plate 9 and the trolley wheels 91, the centrifugal fan 3 can be not only supported, but also moved to a designated position for use together with the air delivery pipeline 33.

[0031] And on the side top of the moving trolley bottom plate 9, a bearing rod 92 is installed through a fixing part, specifically, the fixing part is a fixing bolt, the bottom end of the bearing rod 92 is stably installed on the top of the moving trolley bottom plate 9 through the fixing bolt; and the end of the bearing rod 92 away from the moving trolley bottom plate 9 is matched with the air conveying pipeline 33 to support the air conveying pipeline 33, thereby improving the stability of the air conveying pipeline 33.

[0032] Meanwhile, specifically, referring to Figure 1 and Figure 3 In the embodiment, the steam conveying assembly includes a steam conveying pipeline 51, a second pressure gauge 52, a ball valve 53, a second flowmeter 54 and a pipeline compensator 55. One end of the steam conveying pipeline 51 is fixedly connected to the output end of the steam generator 5, and the other end of the steam conveying pipeline 51 is fixedly connected to the end of the steam injection pipe 2 extending out of the wall of the air injection pipe 1.

[0033] When the steam generator 5 is started, high-temperature steam can be uniformly discharged into the steam injection pipe 2 along the steam conveying pipeline 51, and then the high-temperature steam is injected into the air injection pipe 1 from the steam injection pipe 2, so that the high-temperature steam and the compressed air are mixed.

[0034] The second pressure gauge 52, the ball valve 53, the second flowmeter 54 and the pipeline compensator 55 are installed on the steam conveying pipeline 51 in sequence. The second pressure gauge 52 and the second flowmeter 54 can monitor the flow of steam in real time. The ball valve 53 can open or cut off the flow of steam. The pipeline compensator 55 can absorb the displacement of the steam conveying pipeline 51 due to thermal expansion and contraction, reduce the influence of vibration and impact on the steam conveying pipeline 51, reduce stress concentration, and facilitate the installation and removal of the valve pipeline. In addition, a steam valve and a gas valve are installed on the steam generator 5 to adjust the parameters of the saturated steam.

[0035] Preferably, in the embodiment, a heat preservation layer is further sleeved on the outside of the steam conveying pipeline 51, which is heat preservation cotton, which can effectively prevent the temperature of the high-temperature steam from decreasing when flowing in the steam conveying pipeline 51.

[0036] Therefore, the scheme of the present application sets the steam injection pipe 2 nested in the inside of the air injection pipe 1 to form a nested pipeline. During the injection test, high-temperature steam is injected into the inside of the air injection pipe 1 under the action of the steam generator 5 and the steam conveying assembly, so that the steam and the air are mixed in the inside of the nested pipeline, and then the mixed air and high-temperature steam are uniformly accelerated and injected into the hearth under the action of the centrifugal fan 3 and the air conveying assembly, thereby achieving the effect of strengthening combustion and improving the penetration ability.

[0037] Secondly, with reference to Figure 1 and Figure 2 In the embodiment, the color smoke structure 4 is arranged at one side of the centrifugal fan 3, and an output end of the color smoke structure 4 is connected with an input end of the centrifugal fan 3. The color smoke structure 4 can spray color smoke after being ignited. The color smoke is sucked into the centrifugal fan 3, and then is transported into the air injection pipe 1 along the air conveying pipe 33. Then, the mixed gas is dyed in the air injection pipe 1, and then the dyed mixed gas is sprayed into the atmosphere, so that the dyed mixed gas can be observed and photographed, and the injection test of the mixed gas can be realized.

[0038] Specifically, a photographing position is arranged directly above the outlet of the air injection pipe 1, and the dyed gas injection condition can be observed with reference to the ground. A photographing position is also arranged on the side of the injection direction, and the pitching diffusion condition of the mixed gas can be observed.

[0039] The implementation principle of the test device for air and steam nested injection is as follows: during the injection test, the steam generator 5 is started, the steam generator 5 heats water into high-temperature steam by using liquefied gas, and the high-temperature steam is sent into the steam injection pipe 2 along the steam conveying assembly. Then, the centrifugal fan 3 is started, the compressed air is sent into the air conveying pipe 33 along the flexible pipe 31, and then is uniformly sent into the air injection pipe 1 along the air conveying pipe 33, so that the high-temperature steam and the compressed air are mixed in the nested pipe, and finally the mixed high-temperature steam and compressed air are simultaneously injected into the atmosphere under the action of the centrifugal fan 3.

[0040] Then, the color smoke structure 4 is ignited, and color smoke is sprayed. The color smoke is sucked into the centrifugal fan 3, and then is transported into the air injection pipe 1 along the air conveying pipe 33. Then, the mixed gas is dyed in the air injection pipe 1, and then the dyed mixed gas is sprayed into the atmosphere, so that the dyed mixed gas can be observed and photographed, and the injection test of the mixed gas can be realized.

[0041] The above is only an embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structure or equivalent process transformation according to the content of the present application specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. A test device for air and steam nested injection, characterized by: The utility model provides an air and steam injection pipe, which comprises an air injection pipe (1) and a steam injection pipe (2), the steam injection pipe (2) is nested in the air injection pipe (1), the input end of the air injection pipe (1) is connected with a centrifugal fan (3) through an air conveying assembly, the input end of the centrifugal fan (3) is connected with a color smoke structure (4), and the input end of the steam injection pipe (2) is connected with a steam generator (5) through a steam conveying assembly.

2. A test device for air and steam nested injection according to claim 1, characterized in that: The air conveying assembly comprises a flexible pipe (31) arranged at the output end of the centrifugal fan (3), one end of the flexible pipe (31) is connected with an air conveying pipeline (33) through a mounting head (32), and the air conveying pipeline (33) is connected with the input end of the air injection pipe (1) through a connecting piece.

3. A test device for air and steam nested injection according to claim 2, characterized in that: The air conveying pipeline (33) is further provided with a first pressure gauge (34), a clamp type butterfly valve (35) and a first flowmeter (36).

4. The test device of claim 1, wherein: The steam conveying assembly comprises a steam conveying pipeline (51) connected with the output end of the steam generator (5), one end of the steam conveying pipeline (51) is connected with the input end of the steam injection pipe (2), and the steam conveying pipeline (51) is provided with a second pressure gauge (52), a ball valve (53), a second flowmeter (54) and a pipeline compensator (55).

5. A test device for air and steam nested injection according to claim 4, characterized in that: The steam conveying pipeline (51) is further provided with an insulating layer.

6. A test device for air and steam nested injection according to claim 4, characterized in that: The steam generator (5) is connected with a gasification furnace device (6) through a pipeline, the gasification furnace device (6) is connected with external liquefied petroleum gas (7), and one end of the steam generator (5) is further connected with a water storage tank (8) through a pipeline.

7. A test device for air and steam nested injection according to claim 2, characterized in that: The bottom of the centrifugal fan (3) is provided with a movable trolley bottom plate (9), and the bottom of the movable trolley bottom plate (9) is provided with a plurality of trolley wheels (91).

8. A test device for air and steam nested injection according to claim 7, characterized in that: One side of the movable trolley bottom plate (9) is provided with a bearing rod (92) on the top through a fixing piece, and the bearing rod (92) is matched with the air conveying pipeline (33).

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