Steady-state feeding device for gas-liquid mixing reaction

Abstract

The utility model relates to the field of chemical engineering or environmental protection taking ammonia water or urea as a reducing agent, and discloses a steady-state feeding device for gas-liquid mixing reaction, which comprises a liquid supplementing pipe, a head tank, a vortex breaker, an emptying pipe, a first feeding pipe, a second feeding pipe, an nth feeding pipe, a first drain valve, a second drain valve, an nth drain valve and a drain header pipe, the vortex breaker is located in the head tank, and the liquid supplementing pipe, the first feeding pipe, the second feeding pipe, the nth feeding pipe, the first liquid discharging valve, the second liquid discharging valve, the nth liquid discharging valve and the liquid discharging header pipe are all connected with the head tank or the blow-down pipe. Through the ingenious layout, the gas-phase-to-liquid-phase crosstalk phenomenon caused by unstable ammonia supply pressure of ammonia water is effectively eliminated, and the problems that in a multi-branch parallel reducing agent supply mode, due to unstable local branch flow, the atomization effect violently fluctuates and the like are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chemical industry or environmental protection using ammonia or urea as reducing agent, and particularly relates to a steady-state feeding device for gas-liquid mixed reaction. BACKGROUND

[0002] The selective non-catalytic reduction denitration process or precise denitration process using ammonia or urea method both need to implement atomization on the reducing agent. In order to improve the atomization effect and reduce the comprehensive use amount of the reducing agent, the feeding mode of small flow and multiple branches is adopted in the industry. Usually, the reducing agent flow of each branch is only 0.2-1.5 L / min. In order to maintain the high-precision small-flow reducing supply, the liquid-phase pressure at the gas-liquid intersection is usually 0.03-0.12 MPa. At the same time, the flow of the compressed air for atomization is much larger than that of the liquid-phase reducing agent, and the pressure is much higher than that of the liquid-phase flow. Therefore, the gas phase often appears to be inversely connected to the liquid phase. When the gas phase is inversely connected to the liquid phase, the gas connected into the liquid phase is easy to flow out from the adjacent liquid-phase branch, which leads to the distortion of the reducing agent flow, frequent and large adjustment of the liquid-phase supply, and the large increase of the reducing agent consumption.

[0003] The above information disclosed in the background of the application is only used to increase the understanding of the background of the application, and therefore, it can include the prior art known by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above-mentioned problems, the present application provides a steady-state feeding device for gas-liquid mixed reaction.

[0005] The steady-state feeding device for gas-liquid mixed reaction provided by the present application adopts the following technical scheme:

[0006] The steady-state feeding device for gas-liquid mixed reaction comprises a liquid supplementing pipe, a high-level tank, a vortex breaker, a vent pipe, a first feeding pipe, a second feeding pipe, an nth feeding pipe, a first liquid discharging valve, a second liquid discharging valve, an nth liquid discharging valve and a liquid discharging main pipe. The vortex breaker is located in the high-level tank. The liquid supplementing pipe, the first feeding pipe, the second feeding pipe, the nth feeding pipe, the first liquid discharging valve, the second liquid discharging valve, the nth liquid discharging valve and the liquid discharging main pipe are connected with the high-level tank or the vent pipe.

[0007] Preferably, the vortex breaker is composed of a certain thickness of structured packing, and the thickness of the packing is 20-200 mm. The top height of the vortex breaker is lower than the vertical height of the connection between the liquid supplementing pipe and the high-level tank, and higher than the vertical height of the connection between any one of the first feeding pipe, the second feeding pipe and the nth feeding pipe and the high-level tank.

[0008] Preferably, the high-level tank can be connected with several groups of feeding pipes at any same horizontal height in the lower part.

[0009] Further, any two of the first supply pipe, the second supply pipe and the nth supply pipe are not intersected.

[0010] Preferably, the first supply pipe, the second supply pipe or the nth supply pipe is provided with a check valve and a flow regulating valve, and the check valve is located on the process upstream of the flow regulating valve.

[0011] Preferably, the first drain valve is located at the bottom of the high tank, and the second drain valve to the nth drain valve are located at the upper part of the vortex breaker.

[0012] In summary, the present application has the following beneficial technical effects:

[0013] The present application effectively eliminates the phenomenon of gas phase to liquid phase reverse string caused by unstable ammonia supply pressure of ammonia water, and effectively eliminates the problem of severe fluctuation of atomization effect caused by unstable local branch flow in the multi-branch parallel reducing agent supply mode.

[0014] The liquid phase supply system is no longer afraid of the influence of calcium and magnesium ion scaling on the pipeline and valve, and is no longer subject to the disadvantage of being unable to use fresh water for flushing, thereby saving cost and improving benefit.

[0015] After the implementation of the present application, the liquid phase system is more stable and is no longer subject to the influence of gas phase reverse string to liquid phase, thereby saving cost and saving expense. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the embodiment of the application.

[0017] Explanation of reference signs: 11, liquid supplement pipe; 12, high tank; 13, vortex breaker; 14, vent pipe; a1, first supply pipe; a2, second supply pipe; an, nth supply pipe; b1, first drain valve; b2, second drain valve; bn, nth drain valve; c, drain main pipe; 21, check valve; 22, flow regulating valve. DETAILED DESCRIPTION

[0018] The following will be described in detail with reference to the accompanying drawings Figure 1 The present application will be further described in detail.

[0019] The embodiment of the present application discloses a steady-state feeding device for gas-liquid mixed reaction, which refers to Figure 1, including liquid supplement pipe 11, high tank 12, vortex breaker 13, vent pipe 14, first feeding pipe a1, second feeding pipe a2, nth feeding pipe an, first liquid discharge valve b1, second liquid discharge valve b2, nth liquid discharge valve bn, liquid discharge main pipe c, the vortex breaker 13 is located inside the high tank 12, the liquid supplement pipe 11, the first feeding pipe a1, the second feeding pipe a2, the nth feeding pipe an, the first liquid discharge valve b1, the second liquid discharge valve b2, the nth liquid discharge valve bn and the liquid discharge main pipe c are connected with the high tank 12 or the vent pipe 14.

[0020] The top height of the vortex breaker 13 is lower than the vertical height of the connection between the liquid supplement pipe 11 and the high tank 12, and the vortex breaker 13 is composed of regular fillers with a certain thickness, the thickness of the fillers is 20-200mm, and is higher than the vertical height of the connection between any one of the first feeding pipe a1, the second feeding pipe a2 and the nth feeding pipe an and the high tank 12.

[0021] Any one of the first feeding pipe a1, the second feeding pipe a2 and the nth feeding pipe an can be connected with several groups of feeding pipes at the same horizontal height of the lower part of the high tank 12, and further, any two branch systems of the first feeding pipe a1, the second feeding pipe a2 and the nth feeding pipe an do not intersect.

[0022] The first feeding pipe a1, the second feeding pipe a2 and the nth feeding pipe an are provided with check valves 21 and flow regulating valves 22, the first liquid discharge valve b1 is located at the bottom of the high tank 12, and the second liquid discharge valve b2 to the nth liquid discharge valve bn are located at the upper part of the vortex breaker 13.

[0023] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0024] Secondly: the utility model discloses the embodiment in the drawing, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of not conflicting, the same embodiment and different embodiments of the utility model can be combined with each other;

[0025] Finally: the above only for the preferred embodiment of the utility model has, and does not limit the utility model, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

[0026] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A steady state feed device for gas-liquid mixed reactions, characterized by, The device comprises a liquid supplement pipe (11), a high tank (12), a vortex breaker (13), a vent pipe (14), a first feeding pipe (a1), a second feeding pipe (a2), an nth feeding pipe (an), a first liquid discharge valve (b1), a second liquid discharge valve (b2), an nth liquid discharge valve (bn), and a liquid discharge main pipe (c). The vortex breaker (13) is located inside the high tank (12). The liquid supplement pipe (11), the first feeding pipe (a1), the second feeding pipe (a2), the nth feeding pipe (an), the first liquid discharge valve (b1), the second liquid discharge valve (b2), the nth liquid discharge valve (bn), and the liquid discharge main pipe (c) are all connected with the high tank (12) or the vent pipe (14).

2. The steady state feed device for gas-liquid mixed reaction according to claim 1, wherein, The top of the vortex breaker (13) is lower than the vertical height of the connection between the liquid supplement pipe (11) and the high tank (12), and higher than the vertical height of the connection between any one of the first feeding pipe (a1), the second feeding pipe (a2), and the nth feeding pipe (an) and the high tank (12).

3. The steady state feed device for gas-liquid mixed reaction according to claim 1, wherein The lower part of the high tank (12) can be connected with several groups of feeding pipes at the same horizontal height.

4. The steady state feed device for gas-liquid mixed reaction according to claim 1, wherein The first feeding pipe (a1), the second feeding pipe (a2), and the nth feeding pipe (an) are all provided with a check valve (21) and a flow regulating valve (22).

5. The steady state feed device for gas-liquid mixed reaction according to claim 1, wherein The first liquid discharge valve (b1) is located at the bottom of the high tank (12), and the second liquid discharge valve (b2) to the nth liquid discharge valve (bn) are all located at the upper part of the vortex breaker (13).

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