Pressure equalizing distributor and pipeline distribution system for burner group

Abstract

The utility model discloses a pressure equalizing distributor and a pipeline distribution system for a burner group, the pressure equalizing distributor comprises a fluid inlet pipeline, a distribution pipe, a fluid outlet pipeline and the like, and an inner cavity of the distribution pipe is of an axial symmetry structure. Pressure-equalizing and uniform distribution of fluid in the main pipe among the branch pipelines can be realized, the defects of large pressure difference, non-uniform flow distribution and high response delay of the branch pipelines in the prior art are effectively overcome and improved, and a guarantee is provided for improving the heating uniformity of the industrial furnace. In addition, the device has the advantages of being simple in structure, easy to operate, low in investment and maintenance cost, high in practicability, wide in application range and the like.

Description

Technical Field

[0001] The utility model relates to fluid distribution equipment, in particular to a pressure equalizing distributor and a pipeline distribution system for a burner group comprising the pressure equalizing distributor, belonging to the technical field of fluid pressure equalizing distribution. Background Art

[0002] Industrial furnaces play a vital role in modern industrial production, serving as key equipment for numerous industrial processes. Typically, a single kiln requires high thermal power, while the burner requires low power, necessitating the installation of multiple burners. For example, a heating furnace with an annual processing capacity of 800,000 tons would require approximately 100MW of thermal power per kiln, while a single burner would require approximately 3-4MW of power. Consequently, over 30 burners would be required to simultaneously supply heat to meet the power requirements of the single furnace. Uniformly supplying and distributing fuel and air to these numerous burners to achieve uniform and efficient heating of industrial furnaces has become a pressing challenge for the industry.

[0003] The existing technology usually adopts the distribution method of general-management (such as Figure 4 As shown in the figure, fuel and air are delivered to the burners via a main pipe, and each burner then draws air from the main pipe via branch pipes. This distribution method is simple in structure and low in construction cost, making it widely adopted. However, since each branch pipe draws air from the main pipe in sequence, the flow diversion causes significant pressure differences at the inlet of each branch pipe, resulting in uneven flow distribution between branches. This often requires secondary adjustment, resulting in a long delay in the system's dynamic response and a long adjustment time. Utility Model Content

[0004] In response to the problems of large pressure differences in branch pipes, uneven flow distribution, and long dynamic response delay in the fluid distribution pipeline structure in the existing technology, the utility model provides a pressure equalizing distributor and a pipeline distribution system for a burner group containing the pressure equalizing distributor. The pressure equalizing distributor with multi-chamber isostatic pressure diversion can effectively overcome and improve the shortcomings of large pressure differences in branch pipes, uneven flow distribution, and long response delay in the existing technology, providing a guarantee for improving the heating uniformity of industrial furnaces.

[0005] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are specifically described as follows:

[0006] According to a first embodiment of the present invention, a pressure equalizing distributor is provided:

[0007] A pressure-equalizing distributor includes a fluid inlet pipe, a distribution pipe, and a fluid outlet pipe. The inner cavity of the distribution pipe is axisymmetric and is divided into multiple independent distribution chambers by multiple partitions evenly distributed along its circumference. The inlets of all distribution chambers are simultaneously connected to the outlets of the fluid inlet pipe. Each outlet of each distribution chamber is independently connected to a fluid outlet pipe.

[0008] Preferably, the plurality of distribution chambers are distributed in a ring shape with the axis of the distribution tube as the center, and all the distribution chambers have the same shape and size.

[0009] Preferably, a distribution plate is provided between the outlet of the fluid inlet pipe and the inlets of all the distribution chambers. The distribution plate is provided with a plurality of branch holes, each of which corresponds to a distribution chamber and is used to connect the distribution chamber with the fluid inlet pipe.

[0010] Preferably, the diversion holes are circular through-holes, each of which is independently provided with a spherical elastic valve plug. Each spherical elastic valve plug is independently connected to a fluid inlet and outlet pipe. Fluid is input or output into or out of the spherical elastic valve plug via the fluid inlet and outlet pipe to control the expansion or contraction of the spherical elastic valve plug, thereby controlling the opening or closing of the through-hole.

[0011] Preferably, all fluid inlet and outlet pipes are connected to the same fluid main pipe, and a solenoid valve is independently provided on each fluid inlet and outlet pipe.

[0012] Preferably, the distribution pipe is a closed cylindrical or prismatic pipe. The fluid inlet pipe extends through the axial sidewall of the distribution pipe and communicates with each distribution chamber. Multiple fluid outlet pipes extend through the radial sidewalls corresponding to each distribution chamber and communicate with each distribution chamber.

[0013] Preferably, the inner diameter of the fluid inlet pipe is not less than the sum of the inner diameters of all fluid outlet pipes.

[0014] Preferably, the inner diameter of the fluid inlet pipe is 1.2 to 3 times the sum of the inner diameters of all fluid outlet pipes.

[0015] According to a second embodiment of the present invention, a pipe distribution system for a burner group is provided:

[0016] A piping distribution system for a burner cluster includes a main pipe, branch pipes, and the pressure-equalizing distributor described in the first embodiment. The main pipe is connected to a fluid inlet pipe of the pressure-equalizing distributor. Each fluid outlet pipe of the pressure-equalizing distributor is connected to a burner via an independent branch pipe.

[0017] Preferably, a main pipe valve and a total flow meter are also provided on the main pipe.

[0018] Preferably, the main pipe and the fluid inlet pipe, as well as the branch pipe and the fluid outlet pipe, are connected by flanges.

[0019] In the prior art, as the branch pipelines divert the flow, the flow rate of the main pipe gradually decreases along the flow direction, while the main pipe pressure continues to increase. This is because, when the resistance loss along the pipeline is ignored, according to the Bernoulli equation, the sum of the dynamic pressure and static pressure at each cross section of the main pipe is a constant, that is: 0.5ρv 2 +P=constant, the velocity v decreases, and the static pressure P increases. The static pressure of the main pipe at the branch pipe directly affects the flow of the branch pipe. i The larger the value, the greater the branch flow Q of the branch pipe. i The larger it is. Therefore, in the existing technology, under the same conditions, the flow rate of the branch pipeline closer to the downstream is larger, and the flow rate of the branch pipeline closer to the upstream is smaller, and the distribution of flow in the branch pipeline has a natural unevenness. In order to correct the uneven distribution of flow in the branch pipeline in the existing technology, it is necessary to use a branch flow regulating valve, that is, to perform secondary regulation of the flow between the branches. However, since the adjustment of the branch flow valve will affect the main pipe and branch flow at the same time, it is necessary to iteratively adjust the main pipe and branch flow regulating valves multiple times to make the main pipe flow and branch flow meet the control requirements. This makes the entire adjustment process time-consuming and the system response delay is very high. It makes it difficult for the system to meet the high-frequency and fast-paced working condition adjustment needs of industrial furnaces. Therefore, the utility model designs and proposes a pressure equalizing distributor with multi-chamber isostatic pressure diversion and a pipeline distribution system for a burner group containing the uniform distributor, which can overcome and improve the problems in the existing technology caused by large pressure differences in branch pipes, uneven flow distribution, and high dynamic response delay, and can well meet the high-frequency and fast-paced working condition adjustment needs of industrial furnaces.

[0020] In the present invention, the pressure equalizing distributor is mainly composed of a fluid inlet pipe, a distribution pipe and a fluid outlet pipe, wherein the distribution pipe is mainly composed of a partition, a distribution chamber, a distribution plate, a diversion hole, a spherical elastic valve plug, a fluid inlet and outlet pipe, a fluid main pipe and a solenoid valve. The inner cavity of the distribution pipe is an axisymmetric shape (for example, a cylindrical chamber), the axis of the fluid inlet pipe coincides with the axis of the distribution pipe, and the fluid outlet pipe is evenly distributed on the outer wall corresponding to each distribution chamber with the central axis of the distribution pipe as the center of the circle. The distribution plate is arranged on the straight pipe section connecting the fluid inlet pipe and each distribution chamber, and the distribution plate is provided with diversion holes of the same size as the number of outlets. The through holes are evenly arranged in an annular shape along the center of the distribution plate. The distribution pipe is provided with a partition with the same number as the fluid outlet pipe, and the inner cavity of the distribution pipe is divided into a number of sub-cavities of the same size and arranged in an annular shape (i.e., distribution chambers) by the partition. Each sub-cavity is connected to the fluid inlet pipe through the diversion hole on the distribution plate. In each branch flow hole of the distribution plate, there is a corresponding spherical elastic valve plug. The spherical elastic valve plug can expand to block the branch flow hole under pressure, and can contract to cancel the blocking effect on the branch flow hole under pressure-depressurized state. The spherical elastic valve plug is connected to the fluid inlet and outlet pipes (such as hydraulic branch pipes), and the fluid inlet and outlet pipes are connected to the fluid main pipe (such as hydraulic main pipe). A separate solenoid valve is provided on each fluid inlet and outlet pipe. The opening and closing of the solenoid valve realizes the opening and closing of the spherical elastic valve plug, thereby controlling the opening and closing of the branch flow hole. That is to say, in the present invention, since the distribution pipe has multiple isostatic distribution chambers of the same size and in an annular shape that are simultaneously connected to the fluid inlet pipe, multiple fluid outlet pipes can achieve uniform pressure-equalizing diversion with the same fluid inlet pipe through the distribution pipe.

[0021] In the present invention, when the uniform distributor is used for the burner group: the fluid transported by the main pipe flows in through the fluid inlet pipe, and enters the corresponding distribution chamber from the various branch flow holes of the distribution plate, and then enters the corresponding branch pipe from the fluid outlet pipe connected to each distribution chamber, and finally is sent to the corresponding burner. Since the multiple distribution chambers are designed to be axisymmetric as a whole, the static pressure at the outlet of each distribution chamber is basically equal, thus ensuring the uniform distribution of the fluid among the branch pipes. Since the uniform distribution of the flow among the branch pipes is achieved at the equipment level, there is no need for secondary adjustment of the flow, and only the main pipe regulating valve needs to be adjusted to achieve the burner power control requirements. This avoids the convergence problem of iterative adjustment between the main and branch pipes, greatly improving the dynamic response speed of the system.

[0022] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0023] 1: The pressure equalizing distributor and the pipeline distribution system for the burner group containing the uniform distributor of the utility model can achieve pressure-equalizing and uniform distribution of the main pipe fluid among the branch pipes under the isostatic pressure distribution and diversion effect of the pressure equalizing distributor, effectively overcoming and improving the shortcomings of the existing technology such as large pressure difference, uneven flow distribution and high response delay in the branch pipes, and providing a guarantee for improving the heating uniformity of industrial furnaces.

[0024] 2: The pressure equalizing distributor and the pipe distribution system for the burner group of the present invention also have the characteristics of simple structure, easy operation, low investment and maintenance costs, strong practicality, and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the axial cross section of the pressure equalizing distributor of the utility model.

[0026] Figure 2 It is a structural schematic diagram of the radial cross section of the pressure equalizing distributor of the utility model.

[0027] Figure 3 This is a structural diagram of the pipeline distribution system for the burner group of the present invention.

[0028] Figure 4 Schematic diagram of the pipeline structure of the master-sub-manifold distribution mechanism in the prior art.

[0029] Figure markings: A: pressure equalizing distributor; 1: fluid inlet pipe; 2: distribution pipe; 201: partition; 202: distribution chamber; 3: fluid outlet pipe; 4: distribution plate; 5: spherical elastic valve plug; 501: fluid inlet and outlet pipes; 502: fluid main pipe; 503: solenoid valve; 6: main pipe; 601: main pipe valve; 602: total flow meter; 7: branch pipe; 8: burner. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is illustrated below with examples, and the scope of protection requested by the present invention includes but is not limited to the following embodiments.

[0031] A pressure-equalizing distributor A comprises a fluid inlet pipe 1, a distribution pipe 2, and a fluid outlet pipe 3. The inner cavity of the distribution pipe 2 is axisymmetric and is divided into multiple independent distribution chambers 202 by multiple partitions 201 evenly distributed along its circumference. The inlets of all distribution chambers 202 are simultaneously connected to the outlet of the fluid inlet pipe 1. Each outlet of each distribution chamber 202 is independently connected to a fluid outlet pipe 3.

[0032] Preferably, the plurality of distribution chambers 202 are distributed in a ring shape with the axis of the distribution pipe 2 as the center, and all the distribution chambers 202 have the same shape and size.

[0033] Preferably, a distribution plate 4 is provided between the outlet of the fluid inlet pipe 1 and the inlets of all the distribution chambers 202. The distribution plate 4 is provided with a plurality of branch holes, each corresponding to a distribution chamber 202 and used to connect the distribution chamber 202 with the fluid inlet pipe 1.

[0034] Preferably, the diversion holes are circular through-holes, each of which is independently provided with a spherical elastic valve plug 5. Each spherical elastic valve plug 5 is independently connected to a fluid inlet and outlet pipe 501. Fluid is input or output into or out of the spherical elastic valve plug 5 via the fluid inlet and outlet pipe 501 to control the expansion or contraction of the spherical elastic valve plug 5, thereby controlling the opening or closing of the through-hole.

[0035] Preferably, all the fluid inlet and outlet pipes 501 are connected to the same fluid main pipe 502 , and a solenoid valve 503 is independently provided on each fluid inlet and outlet pipe 501 .

[0036] Preferably, the distribution pipe 2 is a closed cylindrical or prismatic pipe. The fluid inlet pipe 1 penetrates the axial sidewall of the distribution pipe 2 and communicates with each distribution cavity 202. Multiple fluid outlet pipes 3 penetrate the corresponding radial sidewalls of each distribution cavity 202 and communicate with each distribution cavity 202.

[0037] Preferably, the inner diameter of the fluid inlet pipe 1 is not less than the sum of the inner diameters of all fluid outlet pipes 3 .

[0038] Preferably, the inner diameter of the fluid inlet pipe 1 is 1.2 to 3 times the sum of the inner diameters of all the fluid outlet pipes 3 .

[0039] A piping distribution system for a burner cluster includes a main pipe 6, branch pipes 7, and the pressure-equalizing distributor A described in the first embodiment. The main pipe 6 is connected to a fluid inlet pipe 1 of the pressure-equalizing distributor A. Each fluid outlet pipe 3 of the pressure-equalizing distributor A is connected to a burner 8 via an independent branch pipe 7.

[0040] Preferably, a manifold valve 601 and a total flow meter 602 are further provided on the manifold 6 .

[0041] Preferably, the main pipe 6 and the fluid inlet pipe 1 as well as the branch pipe 7 and the fluid outlet pipe 3 are connected by flanges.

[0042] Example 1

[0043] like Figure 1-2As shown, a pressure-equalizing distributor A comprises a fluid inlet pipe 1, a distribution pipe 2, and a fluid outlet pipe 3. The inner cavity of the distribution pipe 2 is axisymmetric and is divided into multiple independent distribution chambers 202 by multiple partitions 201 evenly distributed along its circumference. The inlets of all distribution chambers 202 are simultaneously connected to the outlet of the fluid inlet pipe 1. Each outlet of each distribution chamber 202 is independently connected to a fluid outlet pipe 3.

[0044] Example 2

[0045] The embodiment 1 is repeated, except that the plurality of distribution cavities 202 are distributed in a ring shape with the axis of the distribution tube 2 as the center, and all the distribution cavities 202 have the same shape and size.

[0046] Example 3

[0047] Example 2 is repeated, except that a distribution plate 4 is further provided between the outlet of the fluid inlet pipe 1 and the inlets of all the distribution chambers 202. The distribution plate 4 is provided with a plurality of branch holes, each corresponding to a distribution chamber 202 and used to connect the distribution chamber 202 with the fluid inlet pipe 1.

[0048] Example 4

[0049] Example 3 was repeated, except that the branch holes were circular through-holes. A spherical elastic valve plug 5 was independently installed in each branch hole. Each spherical elastic valve plug 5 was independently connected to a fluid inlet and outlet pipe 501. Fluid was fed into or out of the spherical elastic valve plug 5 through the fluid inlet and outlet pipes 501 to control the expansion or contraction of the spherical elastic valve plug 5, thereby controlling the opening or closing of the through-hole.

[0050] Example 5

[0051] Example 4 is repeated, except that all the fluid inlet and outlet pipes 501 are connected to the same fluid main pipe 502, and a solenoid valve 503 is independently provided on each fluid inlet and outlet pipe 501.

[0052] Example 6

[0053] Example 5 is repeated, except that the distribution pipe 2 is a closed cylindrical or prismatic pipe. The fluid inlet pipe 1 penetrates the axial sidewall of the distribution pipe 2 and communicates with each distribution cavity 202. Multiple fluid outlet pipes 3 penetrate the corresponding radial sidewalls of each distribution cavity 202 and communicate with each distribution cavity 202.

[0054] Example 7

[0055] Repeat Example 6, except that the inner diameter of the fluid inlet pipe 1 is not less than the sum of the inner diameters of all fluid outlet pipes 3 .

[0056] Example 8

[0057] Example 7 is repeated, except that the inner diameter of the fluid inlet pipe 1 is twice the sum of the inner diameters of all the fluid outlet pipes 3 .

[0058] Example 9

[0059] like Figure 3 As shown, a piping distribution system for a burner group includes a main pipe 6, branch pipes 7, and the pressure-equalizing distributor A described in the first embodiment. The main pipe 6 is connected to the fluid inlet pipe 1 of the pressure-equalizing distributor A. Each fluid outlet pipe 3 of the pressure-equalizing distributor A is connected to a burner 8 via an independent branch pipe 7.

[0060] Example 10

[0061] Repeat Example 9, except that a manifold valve 601 and a total flow meter 602 are further provided on the manifold 6.

[0062] Example 11

[0063] Example 10 is repeated, except that the main pipe 6 and the fluid inlet pipe 1 as well as the branch pipe 7 and the fluid outlet pipe 3 are both connected by flanges.

Claims

1. A pressure equalizing distributor, characterized in that: The pressure equalizing distributor (A) comprises a fluid inlet pipe (1), a distribution pipe (2) and a fluid outlet pipe (3); the inner cavity of the distribution pipe (2) is an axisymmetric structure, and the inner cavity of the distribution pipe (2) is divided into a plurality of independent distribution chambers (202) by a plurality of partitions (201) evenly distributed along its circumference; the inlets of all the distribution chambers (202) are simultaneously connected to the outlet of the fluid inlet pipe (1); and the outlet of each distribution chamber (202) is independently connected to a fluid outlet pipe (3).

2. The pressure equalizing distributor according to claim 1, characterized in that: The plurality of distribution chambers (202) are distributed in a ring shape with the axis of the distribution pipe (2) as the center, and the shapes and sizes of all the distribution chambers (202) are consistent.

3. The pressure equalizing distributor according to claim 1 or 2, characterized in that: A distribution plate (4) is provided between the outlet of the fluid inlet pipe (1) and the inlets of all the distribution chambers (202); a plurality of branch flow holes are provided on the distribution plate (4), each branch flow hole corresponding to a distribution chamber (202) and used to connect the distribution chamber (202) with the fluid inlet pipe (1).

4. The pressure equalizing distributor according to claim 3, characterized in that: The branch flow holes are circular through holes, and a spherical elastic valve plug (5) is independently provided in each branch flow hole; each spherical elastic valve plug (5) is independently connected to a fluid inlet and outlet pipe (501); fluid is input into or output from the spherical elastic valve plug (5) through the fluid inlet and outlet pipe (501) to control the expansion or contraction of the spherical elastic valve plug (5), thereby controlling the opening or closing of the through hole.

5. The pressure equalizing distributor according to claim 4, characterized in that: All the fluid inlet and outlet pipes (501) are connected to the same fluid main pipe (502), and a solenoid valve (503) is independently provided on each fluid inlet and outlet pipe (501).

6. The pressure equalizing distributor according to any one of claims 1-2, 4-5, characterized in that: The distribution pipe (2) is a closed cylindrical or regular prism-shaped pipe; the fluid inlet pipe (1) penetrates the axial side wall of the distribution pipe (2) and is connected to each distribution cavity (202); and the plurality of fluid outlet pipes (3) penetrate the radial side wall corresponding to each distribution cavity (202) and are connected to each distribution cavity (202).

7. The pressure equalizing distributor according to claim 3, characterized in that: The distribution pipe (2) is a closed cylindrical or regular prism-shaped pipe; the fluid inlet pipe (1) penetrates the axial side wall of the distribution pipe (2) and is connected to each distribution cavity (202); and the plurality of fluid outlet pipes (3) penetrate the radial side wall corresponding to each distribution cavity (202) and are connected to each distribution cavity (202).

8. The pressure equalizing distributor according to any one of claims 1-2, 4-5, and 7, characterized in that: The inner diameter of the fluid inlet pipe (1) is not less than the sum of the inner diameters of all the fluid outlet pipes (3).

9. The pressure equalizing distributor according to claim 3, characterized in that: The inner diameter of the fluid inlet pipe (1) is not less than the sum of the inner diameters of all the fluid outlet pipes (3).

10. The pressure equalizing distributor according to claim 6, characterized in that: The inner diameter of the fluid inlet pipe (1) is not less than the sum of the inner diameters of all the fluid outlet pipes (3).

11. The pressure equalizing distributor according to claim 8, characterized in that: The inner diameter of the fluid inlet pipe (1) is 1.2 to 3 times the sum of the inner diameters of all the fluid outlet pipes (3).

12. The pressure equalizing distributor according to claim 9 or 10, characterized in that: The inner diameter of the fluid inlet pipe (1) is 1.2 to 3 times the sum of the inner diameters of all the fluid outlet pipes (3).

13. A pipe distribution system for a burner group, characterized by: The system comprises a main pipe (6), a branch pipe (7) and a pressure equalizing distributor (A) as described in any one of claims 1 to 12; the main pipe (6) is connected to a fluid inlet pipe (1) of the pressure equalizing distributor (A); each fluid outlet pipe (3) of the pressure equalizing distributor (A) is connected to a burner (8) via an independent branch pipe (7).

14. The burner group piping distribution system according to claim 13, characterized in that: The main pipe (6) is also provided with a main pipe valve (601) and a total flow meter (602).

15. The burner group piping distribution system according to claim 13 or 14, characterized in that: The main pipe (6) and the fluid inlet pipe (1) as well as the branch pipe (7) and the fluid outlet pipe (3) are both connected by flanges.

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