Low-pressure small-flow axial-flow type energy recovery turbine device

Abstract

The utility model discloses a low-pressure small-flow axial-flow type energy recovery turbine device, which comprises a blast furnace gas discharge pipe, the gas inlet end of the blast furnace gas discharge pipe is communicated with a blast furnace gas output port, and the blast furnace gas discharge pipe is connected and communicated with a turbine gas inlet pipeline in the gas inlet end direction of a pressure reducing valve group. The other end of the turbine gas inlet pipeline is communicated with the gas inlet end of the turbine, the gas outlet end of the turbine is communicated with a turbine gas outlet pipeline, the other end of the turbine gas outlet pipeline is connected and communicated with a blast furnace gas discharge pipe, and meanwhile the other end of the turbine gas outlet pipeline is located in the gas outlet end direction of the pressure reducing valve set. When the pressure of the blast furnace gas discharge pipe rises, the pressure sensor can immediately sense and measure the pressure value in the turbine gas inlet pipeline, at the moment, the control unit can control and increase the conduction caliber of the pressure release valve according to the pressure value, and otherwise, the conduction caliber is reduced; and the turbine air inlet pipeline is always kept in a reasonable pressure operation range.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace blower application, in particular to an axial flow energy recovery turbine device with low pressure and small flow. Background Art

[0002] Currently, small blast furnaces typically use a pressure reducing valve assembly to convert the pressure and temperature of the top gas into noise. This reduced temperature and pressure is then burned to generate electricity. While this achieves significant energy recovery, it also has some drawbacks. For example, during operation, the airflow through the pressure reducing valve assembly in the tailpipe is noisy, hindering the user-friendly use of mobile platforms. Furthermore, by directly converting the pressure and temperature of the blast furnace gas into noise for combustion to generate electricity, some of the recovered usable energy is lost, resulting in inefficient energy utilization and reduced economic benefits for the enterprise. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] Therefore, the purpose of the present invention is to provide a low-pressure, low-flow axial-flow energy recovery turbine device to solve the problems of high noise and ineffective energy utilization in the existing small blast furnace tail gas energy recovery and utilization proposed in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a low-pressure, low-flow axial-flow energy recovery turbine device, comprising a blast furnace gas discharge pipe whose inlet end is connected to the blast furnace gas output port, the blast furnace gas discharge pipe is provided with a pressure reducing valve group, the blast furnace gas discharge pipe and the inlet end direction of the pressure reducing valve group are connected with a turbine inlet pipe, the other end of the turbine inlet pipe is connected to the inlet end of the turbine, the outlet end of the turbine is connected with a turbine outlet pipe, and the other end of the turbine outlet pipe is connected with the blast furnace gas discharge pipe, and the other end of the turbine outlet pipe is located in the outlet direction of the pressure reducing valve group, the driving end of the turbine has a transmission shaft connected to its internal rotor, the outer end of the transmission shaft is drivingly connected to a blast furnace blower, the turbine inlet pipe is provided with a temperature and pressure sensing component, and an auxiliary bypass pipe is also connected between the turbine inlet pipe and the turbine outlet pipe.

[0006] As a preferred solution of a low-pressure and low-flow axial flow energy recovery turbine device described in the utility model, the blast furnace gas exhaust pipe is provided with at least two ports, namely, an air inlet connected to the blast furnace gas output port, and an exhaust port located at the other end of the blast furnace gas exhaust pipe and connected to the generator set.

[0007] As a preferred solution of the low-pressure and low-flow axial-flow energy recovery turbine device described in the utility model, the temperature and pressure sensing component includes a pressure sensor and a temperature sensor arranged on the turbine intake pipe.

[0008] As a preferred solution of a low-pressure, small-flow axial-flow energy recovery turbine device described in the utility model, the auxiliary bypass line includes a pressure relief pipe with one end connected to the turbine inlet line and the other end connected to the turbine outlet line, and a pressure relief valve arranged on the pressure relief pipe.

[0009] As a preferred solution of a low-pressure, low-flow axial flow energy recovery turbine device described in the utility model, the low-pressure, low-flow axial flow energy recovery turbine device also includes a controller respectively connected to the pressure reducing valve group, turbine, blast furnace blower, temperature and pressure sensor component and pressure relief valve signal.

[0010] As a preferred solution of the low-pressure and low-flow axial-flow energy recovery turbine device described in the utility model, the low-pressure and low-flow axial-flow energy recovery turbine device is also provided with a soundproof outer protective cover.

[0011] Compared with the existing technology, the beneficial effects of the utility model are: this low-pressure, small-flow axial-flow energy recovery turbine device has the characteristics of reasonable structure, stable operation and high energy utilization rate. It utilizes low-pressure and small-flow energy recovery and branch-type control to convert the exhaust gas pressure and temperature that were originally converted into noise into mechanical energy that directly drives the blast furnace blower, while reducing the noise of the pressure reducing valve group, so that the exhaust gas energy can be fully utilized as much as possible, thereby reducing the production costs of enterprises and users and improving their economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the control process structure of the utility model.

[0014] In the figure: 100, blast furnace gas discharge pipe; 110, air inlet; 120, exhaust port; 200, pressure reducing valve group; 300, turbine inlet pipeline; 310, turbine; 3101, drive shaft; 320, turbine outlet pipeline; 400, blast furnace blower; 500, temperature and pressure sensing assembly; 510, pressure sensor; 520, temperature sensor; 600, auxiliary bypass pipeline; 610, pressure relief pipe; 620, pressure relief valve; 700, controller. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0016] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0018] Figure 1-Figure 2 The figure shows the complete structure of a low pressure and low flow axial flow energy recovery turbine device of the present invention. Figure 1-Figure 2 The present embodiment is a low-pressure, low-flow axial-flow energy recovery turbine device, comprising a blast furnace gas discharge pipe 100 whose air inlet end is connected to the blast furnace gas outlet, a pressure reducing valve group 200 being provided on the blast furnace gas discharge pipe 100, a turbine air inlet pipeline 300 being connected to the air inlet end of the pressure reducing valve group 200 on the blast furnace gas discharge pipe 100, the other end of the turbine air inlet pipeline 300 being connected to the air inlet end of a turbine 310, the air outlet end of the turbine 310 being connected to a turbine air outlet pipeline 320, and The other end of the turbine outlet pipe 320 is connected to the blast furnace gas exhaust pipe 100. At the same time, the other end of the turbine outlet pipe 320 is located in the outlet direction of the pressure reducing valve group 200. The driving end of the turbine 310 has a transmission shaft 3101 connected to its internal rotor. The outer end of the transmission shaft 3101 is driven and connected to the blast furnace blower 400. A temperature and pressure sensor component 500 is provided on the turbine inlet pipe 300. An auxiliary bypass pipe 600 is also connected between the turbine inlet pipe 300 and the turbine outlet pipe 320.

[0019] The blast furnace gas exhaust pipe 100 is provided with at least two ports, namely an air inlet 110 connected to the blast furnace gas output port, and an exhaust port 120 located at the other end of the blast furnace gas exhaust pipe 100 and connected to the generator set. It can be understood that the blast furnace gas exhaust pipe 100 is the basic platform of the axial flow energy recovery turbine device, and is the core of the energy recovery and utilization of the present embodiment. In addition, the blast furnace gas exhaust pipe 100 is still equipped with a pressure reducing valve group 200, which is the basic functional unit of the entire platform. This is a conventional technical means in this field and will not be elaborated in detail.

[0020] The temperature and pressure sensing assembly 500 includes a pressure sensor 510 and a temperature sensor 520 mounted on the turbine intake line 300. During normal operation, the front and rear valves of the pressure reducing valve assembly 200 are both closed, so the exhaust gas discharged from the blast furnace gas discharge pipe 100 primarily passes through the turbine intake line 300 and the pressure relief pipe 610. Since the main pipeline for energy recovery is the turbine intake line 300, the pressure sensor 510 and temperature sensor 520 can be used to monitor the exhaust gas temperature and pressure within the turbine intake line 300 in real time. This facilitates the control unit to obtain more specific parameters, conduct data analysis, and refine control, thereby facilitating the smooth output of mechanical energy conversion.

[0021] The auxiliary bypass line 600 includes a pressure relief pipe 610 connected to the turbine intake line 300 at one end and to the turbine outlet line 320 at the other end, and a pressure relief valve 620 disposed on the pressure relief pipe 610. It will be appreciated that the pressure of blast furnace gas discharge is not always constant, while the pressure through the turbine intake line 300 is generally maintained constant. Therefore, for example, when the pressure in the blast furnace gas discharge line 100 increases, the pressure sensor 510 immediately senses and measures the pressure in the turbine intake line 300. The control unit then controls the opening of the pressure relief valve 620 based on this pressure, increasing the opening diameter, or decreasing the opening diameter, to ensure that the turbine intake line 300 always maintains a reasonable operating pressure range.

[0022] It should be noted that since the exhaust gas energy required by the turbine 310 is low pressure and small flow, with the cooperation of the turbine inlet pipe 300 and the pressure relief pipe 610, the exhaust gas can be diverted and discharged to the turbine outlet pipe 320, and then channeled to the blast furnace gas discharge pipe 100. In this way, the high-temperature and high-pressure exhaust gas will not pass through the pressure reducing valve group 200 and cause noise pollution, while realizing mechanical energy utilization and synchronous power generation, so that the exhaust gas energy can be fully utilized as much as possible, thereby improving the economic benefits of the enterprise.

[0023] The low-pressure, low-flow axial-flow energy recovery turbine device also includes a controller 700 that is respectively connected to the pressure reducing valve group 200, the turbine 310, the blast furnace blower 400, the temperature and pressure sensor assembly 500 and the pressure relief valve 620. It can be understood that the controller 700 can facilitate the staff to carry out integrated management of the recovery turbine device, thereby improving the operating efficiency of the device.

[0024] Furthermore, the low-pressure, low-flow axial-flow energy recovery turbine device is also provided with a soundproof outer protective cover. Here, through the external soundproof outer protective cover, it is possible to isolate and manage the device from the outside world, thereby reducing the overall noise caused by the operation of the equipment.

[0025] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A low-pressure, low-flow axial-flow energy recovery turbine device, characterized in that: The invention comprises a blast furnace tail gas discharge pipe (100) whose air inlet end is connected to the blast furnace tail gas output port, a pressure reducing valve group (200) is provided on the blast furnace tail gas discharge pipe (100), a turbine air inlet pipeline (300) is connected to the air inlet end of the pressure reducing valve group (200), the other end of the turbine air inlet pipeline (300) is connected to the air inlet end of a turbine (310), the air outlet end of the turbine (310) is connected to the turbine air outlet pipeline (320), and the other end of the turbine air outlet pipeline (320) is connected to the turbine air outlet pipeline (320). The invention relates to a turbine air inlet pipe (300) connected to a blast furnace tail gas discharge pipe (100), and the other end of the turbine air outlet pipe (320) is located in the air outlet direction of the pressure reducing valve group (200). The driving end of the turbine (310) has a transmission shaft (3101) connected to its internal rotor, and the outer end of the transmission shaft (3101) is drivingly connected to a fan (400). The turbine air inlet pipe (300) is provided with a temperature and pressure sensor component (500), and an auxiliary pressure relief pipe (600) is also connected between the turbine air inlet pipe (300) and the turbine air outlet pipe (320).

2. The low-pressure, low-flow axial-flow energy recovery turbine device according to claim 1, characterized in that: The blast furnace tail gas discharge pipe (100) is provided with at least two ports, namely an air inlet (110) connected to the blast furnace tail gas output port, and an exhaust port (120) located at the other end of the blast furnace tail gas discharge pipe (100) and connected to the generator set.

3. The low-pressure, low-flow axial-flow energy recovery turbine device according to claim 1, characterized in that: The temperature and pressure sensing assembly (500) comprises a pressure sensor (510) and a temperature sensor (520) arranged on the turbine air inlet pipeline (300).

4. The low-pressure, low-flow axial-flow energy recovery turbine device according to claim 1, characterized in that: The auxiliary pressure relief pipeline (600) comprises a pressure relief pipe (610) having one end connected to the turbine air inlet pipeline (300) and the other end connected to the turbine air outlet pipeline (320), and a pressure relief valve (620) arranged on the pressure relief pipe (610).

5. The low-pressure, low-flow axial-flow energy recovery turbine device according to claim 1, characterized in that: The low-pressure, low-flow axial-flow energy recovery turbine device further comprises a controller (700) which is signal-connected to the pressure reducing valve group (200), the turbine (310), the fan (400), the temperature and pressure sensing component (500), and the pressure relief valve (620).

6. The low-pressure, low-flow axial-flow energy recovery turbine device according to claim 1, characterized in that: The low-pressure and low-flow axial-flow energy recovery turbine device is also provided with a sound-insulating outer protective cover.

Images