Steam heating and mixing device for anaerobic reactor of waste incineration power plant

Abstract

The utility model discloses a steam heating and mixing device for an anaerobic reactor of a waste incineration power plant, which comprises a main pipe connected in a circulating pipeline of the anaerobic reactor; one end of the side branch pipe is connected with the main pipe, and the other end is connected with a steam inlet valve assembly; the direct injection type movable branch pipe is connected with the steam inlet valve assembly, extends into the center of the main pipe through the side branch pipe and is used for injecting steam into the main pipe; the tail end of the direct injection type movable branch pipe is bent to form a nozzle, and the steam injection direction of the nozzle is consistent with the liquid inlet direction of the main pipe; and the spoiler is fixed in the main pipe and is positioned at the downstream of the nozzle of the direct injection type movable branch pipe.

Description

Technical Field

[0001] The utility model relates to a steam heating mixing device of an anaerobic reactor in a garbage incineration power plant, belonging to the technical field of garbage leachate treatment. Background Art

[0002] The anaerobic reactor is an important equipment for treating landfill leachate. It converts organic matter into harmless gases such as methane and carbon dioxide through the action of anaerobic microorganisms. In this process, it is very important to maintain the appropriate temperature because the activity efficiency of anaerobic microorganisms is greatly affected by temperature. Therefore, anaerobic reactors usually need to be equipped with a heating system to ensure the temperature inside the reactor is stable. The temperature of the anaerobic reactor is preferably controlled at 30-35℃. Controlling the temperature range of the anaerobic reactor is a key factor in whether the anaerobic reaction can operate normally.

[0003] The main function of the steam heating mixing device of the anaerobic reactor is to introduce steam into the anaerobic reactor to increase the temperature inside the reactor, thereby promoting the activity of anaerobic microorganisms. Steam direct heating uses a steam-water mixing device to directly spray low-pressure saturated steam into the circulation pipe of the anaerobic reactor to increase the temperature of the anaerobic reactor and promote the metabolism and normal growth of anaerobic microorganisms. It has the advantages of simple structure and low cost.

[0004] refer to Figure 1 The existing steam heating and mixing device is composed of a main pipe 10 and a side branch pipe 20 fixed on the main pipe. The main pipe is arranged on the circulation pipe of the anaerobic reactor. One end of the side branch pipe is connected to the steam pipe and the other end is arranged in the main pipe. The medium flowing through the main pipe is anaerobic digestion liquid, and the medium flowing through the side branch pipe is low-pressure saturated steam. In the existing steam heating and mixing device, when the low-pressure saturated steam is injected into the main pipe, it mixes with the anaerobic digestion liquid in the circulation pipe. The heating process generates turbulent disturbance, causing strong friction between steam and water, and generating a loud noise. The steam-water disturbance can also cause violent vibration of the main pipe and the pipeline connected to it, and even cracking of the circulation pipeline, causing sewage leakage, increasing safety and environmental risks, and affecting the normal operation of the anaerobic reactor. In addition, since the steam is directly introduced into the main pipe to mix with the anaerobic digestion liquid, local overheating is prone to occur, causing the side branch pipe and its steam heating pipe to frequently scale and clog. Furthermore, in summer, when the ambient temperature is high and the anaerobic reactor does not need saturated steam heating, the side branch pipe of the steam heating and mixing device is placed in the anaerobic digestion liquid, which is also prone to scaling and clogging. Utility Model Content

[0005] The main purpose of the utility model is to provide a steam heating mixing device for an anaerobic reactor of a garbage incineration power plant, so as to solve the technical problem that the existing steam heating mixing device has pipeline cracking caused by severe vibration of the pipeline during the mixing and heating process.

[0006] In order to achieve the above-mentioned purpose, the utility model proposes the following technical solutions:

[0007] A steam heating and mixing device for an anaerobic reactor in a waste incineration power plant comprises: a main pipe connected to a circulation pipeline of the anaerobic reactor; a side branch pipe, one end of which is connected to the main pipe and the other end of which is connected to a steam inlet valve assembly; a direct-injection movable branch pipe, which is connected to the steam inlet valve assembly and extends into the center of the main pipe via the side branch pipe, and is used to inject steam into the main pipe; the end of the direct-injection movable branch pipe is bent to form a nozzle, and the direction in which the nozzle injects steam is consistent with the liquid inlet direction of the main pipe; and a spoiler, which is fixed in the main pipe and is located downstream of the nozzle of the direct-injection movable branch pipe.

[0008] The above technical solution provided by the utility model has the beneficial effects of: steam is directly introduced into the center of the main pipe by arranging a direct-injection movable branch pipe, and steam is sprayed from the center along the flow direction of the anaerobic digestion liquid through a nozzle formed by bending. Since the steam pressure at the nozzle is reduced and the spraying direction is consistent with the flow direction of the fluid, the turbulent disturbance between the gas and liquid phases can be reduced; in the absence of the influence of the turbulent disturbance between the gas and liquid phases, the flow direction of the fluid is changed and the fluid speed is reduced through the spoiler in the main pipe, so that the anaerobic digestion liquid and the steam are fully mixed evenly, and finally not only the vibration of the pipeline is effectively reduced and the problem of pipeline cracking during the heating process is avoided, but also the steam and the anaerobic digestion liquid are more fully mixed, the problem of local overheating is avoided, and the scaling and blockage of the pipeline are reduced.

[0009] Furthermore, the direct-injection active branch pipe includes a first connecting component, a straight pipe section and the nozzle, one end of the straight pipe section is connected to the first connecting component, and the other end is connected to the nozzle, and the nozzle faces the liquid outlet end of the main pipe.

[0010] Furthermore, the central axis of the nozzle coincides with the central axis of the main pipe. Spraying steam from the center of the main pipe is more conducive to uniform mixing of steam and anaerobic digestion liquid.

[0011] Furthermore, the end of the nozzle is at least 100 mm away from the spoiler.

[0012] Furthermore, the direct injection active branch pipe is detachably connected to the steam inlet valve assembly through the first connection assembly. The detachable connection facilitates the removal of the direct injection active branch pipe when the ambient temperature is high and the anaerobic digestion liquid does not need to be heated, thereby avoiding scaling and clogging caused by immersion in the anaerobic digestion liquid.

[0013] Furthermore, a waterproof gasket is provided between the first connecting assembly and the steam inlet valve assembly.

[0014] Furthermore, the first connection assembly includes a first flange, the steam inlet valve assembly includes a second flange, and the liquid inlet end and the liquid outlet end of the main pipe are respectively connected to a third flange and a fourth flange.

[0015] Furthermore, the spoiler is a cross spoiler, a fixed shaft is arranged in the main pipe, and the cross spoiler includes a first spoiler and a second spoiler which are cross-fixed to the fixed shaft.

[0016] Furthermore, the first spoiler and the second spoiler each include a plurality of spoiler plates connected end to end, and two adjacent spoiler plates form an obtuse angle with each other, and the opening directions of the two adjacent obtuse angles are opposite.

[0017] Furthermore, the axis of the fixed shaft coincides with the central axis of the main pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an existing steam heating mixing device.

[0019] Figure 2 It is a schematic diagram of a steam heating mixing device according to an embodiment of the utility model.

[0020] Figure 3 It is a schematic diagram of an exemplary cross spoiler used in the steam heating mixing device of an embodiment of the utility model.

[0021] Figure 4 It is a schematic diagram of another exemplary spoiler used in the steam heating mixing device of an embodiment of the utility model.

[0022] The following are the descriptions of the reference numerals:

[0023] 10-main pipe, 20, 20'-side branch pipe, 30-direct injection movable branch pipe, 40-spoiler, 50-waterproof gasket, 101, 102, 201, 301-flange, 302-straight pipe section, 303-nozzle, 401-fixed shaft, 402-first spoiler, 403-second spoiler. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and in combination with specific implementation methods and examples. The purpose of providing the examples is only to illustrate, and not to impose any limitation.

[0025] The utility model embodiment provides a steam heating mixing device (hereinafter referred to as "device") for an anaerobic reactor of a waste incineration power plant, Figure 2The device comprises a main pipe 10, a side branch pipe 20', a direct injection type active branch pipe 30 and a spoiler 40; the main pipe 10 is arranged in the circulation pipeline of the anaerobic reactor, and its two ends, the liquid inlet end and the liquid outlet end, are connected to the circulation pipeline of the anaerobic reactor through flanges 101 and 102 respectively; one end of the side branch pipe 20' is connected to the main pipe 10 but does not extend into the main pipe, and the other end is connected to a steam inlet valve assembly such as a flange 201; the direct injection type active branch pipe 30 is used to inject steam into the main pipe 10, and the side branch pipe 20' is connected to the main pipe 10 ... The branch pipe 20' is connected to the steam inlet valve assembly and extends to the center of the main pipe through the side branch pipe; the end of the direct injection type active branch pipe 30 is bent to form a nozzle, and the direction in which the nozzle sprays steam into the main pipe is consistent with the liquid inlet direction of the main pipe, thereby reducing the turbulent disturbance between the gas and liquid phases caused by the steam impacting the anaerobic digestion liquid; the spoiler 40 is fixed in the main pipe 10, located downstream of the nozzle of the direct injection type active branch pipe 30, and is used to change the flow state of the fluid, improve the mixing degree of steam and anaerobic digestion liquid, and reduce vibration. Specifically, the spoiler can change the flow direction and velocity distribution of the fluid, increase friction resistance, reduce the velocity of the fluid, and change the turbulent form of the liquid when the turbulent disturbance between the gas and liquid phases is relatively small, thereby improving the gas-liquid mixing degree and achieving a better mixing effect. Ultimately, the device of the utility model not only solves the problem of pipeline cracking caused by severe pipeline vibration, but also realizes uniform mixing and heating at the same time.

[0026] Continue to refer Figure 2 Specifically, the direct injection type active branch pipe 30 includes a flange 301 at the steam inlet end, a straight pipe section 302 and a nozzle 303. The flange 301 is connected to the flange 201 of the side branch pipe. One end of the straight pipe section 302 is connected to the flange 301 and the other end is connected to the nozzle 303. The straight pipe section 302 extends into the main pipe through the side branch pipe 20' and directly reaches the center of the main pipe, so that the nozzle 303 at the end of the straight pipe section is located in the center of the main pipe, and the nozzle 303 faces the liquid outlet end of the main pipe 10. In this way, the steam can be directly sprayed to the center of the main pipe through the direct injection type active branch pipe 30. Since the nozzle reduces the steam injection pressure, and the steam injection direction is consistent with the flow direction of the anaerobic digestion liquid in the main pipe, the gas-liquid two-phase turbulent disturbance when the steam enters the anaerobic digestion liquid in the prior art can be reduced, so that the steam and the anaerobic digestion liquid flow through the spoiler have less vibration.

[0027] In addition, since the connection between the flange 301 of the direct-injection movable branch pipe 30 and the flange 201 of the side branch pipe 20' is detachable, when the ambient temperature is high and the anaerobic digestion liquid does not need to be heated, the direct-injection movable branch pipe 30 can be completely removed to avoid scaling and clogging due to immersion in the anaerobic digestion liquid. In addition, a waterproof gasket 50 can be added between the flange 301 and the flange 201.

[0028] In some preferred embodiments, the nozzle 303 of the direct-injection active branch pipe 30 is formed by bending (especially arc-shaped bending) from the end of the straight pipe section 302, and this bending makes the central axis of the nozzle nearly coincide with the central axis of the main pipe (or even exactly coincide), that is, the length L1 from the center of the nozzle to the inner wall of the main pipe is exactly equal to half of the inner diameter of the main pipe. In addition, the distance L2 between the nozzle 303 and the downstream spoiler is preferably greater than 100 mm. More preferably, the flange 201 and the flange 301 have the same size. In addition, those skilled in the art can adjust the pipe diameter and nozzle size of the direct-injection active branch pipe according to the required steam pressure, flow rate, etc.

[0029] In some embodiments, the spoiler 40 is a cross spoiler, such as Figure 2 , a fixed shaft 401 is inserted into the main pipe 10, and the cross spoiler is fixed on the fixed shaft 401; preferably, the cross spoiler is welded and fixed on the fixed shaft 401, and is not connected to the inner wall of the main pipe 10. In this way, it is convenient to disassemble and clean the cross spoiler together with the fixed shaft. More preferably, the fixed shaft 401 is almost at or just at the center of the main pipe, that is, the axis of the fixed shaft 401 is almost coincident with or just coincident with the central axis of the main pipe.

[0030] refer to Figure 2 and Figure 3 In some specific embodiments, the cross spoiler includes a first spoiler 402 and a second spoiler 403 that cross each other. The first spoiler 402 and the second spoiler 403 both include multiple spoilers connected end to end, and two adjacent spoilers form an obtuse angle with each other, and the opening directions of the two adjacent obtuse angles are opposite. Figure 4 Another specific embodiment of the spoiler is shown. It should be understood that Figure 3 and Figure 4 The figure only shows an exemplary implementation of the spoiler of the present invention. Those skilled in the art may make appropriate modifications according to the principle and technical solution of the present invention, as long as the same functions can be achieved.

[0031] In summary, the steam heating mixing device of the embodiment of the utility model solves the problem of pipeline cracking and sewage leakage caused by violent vibration caused by steam-water mixing during operation of the existing steam heating mixing device, ensuring the stable operation of the anaerobic reactor. When the anaerobic digestion liquid is heated, the pipeline will not be blocked and the heating efficiency is high, which is convenient for cleaning and replacing the direct injection movable branch pipe, reducing the workload required for manual disassembly and assembly of equipment, mechanical dredging and cleaning, shortening the maintenance time, and reducing the safety risks during equipment maintenance.

[0032] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For technicians in the technical field to which the present invention belongs, several equivalent substitutions or obvious variations can be made without departing from the concept of the present invention, and the performance or use is the same, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A steam heating mixing device for an anaerobic reactor in a waste incineration power plant, characterized in that: include: A main pipe connected to a circulation pipeline of the anaerobic reactor; A side branch pipe, one end of which is connected to the main pipe, and the other end of which is connected to a steam inlet valve assembly; A direct-injection movable branch pipe is connected to the steam inlet valve assembly and extends into the center of the main pipe via the side branch pipe, and is used to inject steam into the main pipe; the end of the direct-injection movable branch pipe is bent to form a nozzle, and the direction in which the nozzle injects steam is consistent with the liquid inlet direction of the main pipe; as well as A spoiler is fixed in the main pipe and is located downstream of the nozzle of the direct injection active branch pipe.

2. The steam heating mixing device according to claim 1, characterized in that: The direct-injection active branch pipe comprises a first connecting assembly, a straight pipe section and the nozzle. One end of the straight pipe section is connected to the first connecting assembly, and the other end is connected to the nozzle. The nozzle faces the liquid outlet end of the main pipe.

3. The steam heating mixing device according to claim 1 or 2, characterized in that: The central axis of the nozzle coincides with the central axis of the main pipe.

4. The steam heating mixing device according to claim 1 or 2, characterized in that: The tip of the nozzle is at least 100 mm away from the spoiler.

5. The steam heating mixing device according to claim 2, characterized in that: The direct injection active branch pipe is detachably connected to the steam inlet valve assembly via the first connecting assembly.

6. The steam heating mixing device according to claim 5, characterized in that: A waterproof gasket is arranged between the first connecting assembly and the steam inlet valve assembly.

7. The steam heating mixing device according to claim 2, characterized in that: The first connection assembly includes a first flange, the steam inlet valve assembly includes a second flange, and the liquid inlet end and the liquid outlet end of the main pipe are respectively connected to a third flange and a fourth flange.

8. The steam heating mixing device according to claim 1, characterized in that: The spoiler is a cross spoiler. A fixed shaft is arranged in the main pipe. The cross spoiler includes a first spoiler and a second spoiler which are cross-fixed to the fixed shaft.

9. The steam heating mixing device according to claim 8, characterized in that: The first spoiler and the second spoiler both include a plurality of spoiler plates connected end to end, and two adjacent spoiler plates form an obtuse angle with each other, and the opening directions of the two adjacent obtuse angles are opposite.

10. The steam heating mixing device according to claim 8, characterized in that: The axis of the fixed shaft coincides with the central axis of the main pipe.

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