Efficient steam exhaust device water replenishing system

Abstract

The utility model belongs to the technical field of thermal power steam exhaust devices, and particularly relates to an efficient steam exhaust device water replenishing system which comprises a steam exhaust device water replenishing control valve assembly, the end of the steam exhaust device water replenishing control valve assembly is fixedly connected with a water distribution pipe, and the outer wall of the water distribution pipe is in threaded connection with a steam exhaust device water replenishing atomizing nozzle. An exhaust device is arranged outside the steam exhaust device water replenishing atomizing nozzle; the steam exhaust device water supplementing control valve assembly comprises a water inlet pipe, the end of the water inlet pipe is fixedly connected with a water pump, the side of the water pump is fixedly connected with a water outlet pipe, the outer wall of the water outlet pipe is fixedly connected with a control valve body, and the end of the water outlet pipe is fixedly connected with a threaded connection pipe; firstly, the water replenishing heat absorption capacity is increased, the waste steam recovery heat is increased, the cooling loss of a steam turbine is reduced, and the condensation water supercooling degree is reduced; secondly, the water supplementing and oxygen removing effect can be improved, and the oxygen removing capacity of the whole heat regeneration system is improved; and finally, unit backpressure is improved, and unit heat economy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power exhaust steam devices, and particularly relates to a water replenishing system for an efficient exhaust steam device. Background Art

[0002] The exhaust steam device is an important auxiliary machine of a thermal power unit. As the cold end of the unit, the working effect of the condensing equipment will directly affect the safety and economy of the unit. By adopting a water replenishing atomization system, the mixed heat exchange between the exhaust steam and the water replenishment can be promoted to the greatest extent, and the heat exchange area between the exhaust steam and the chemical water replenishment can be increased, which is beneficial to enhancing the heat transfer effect and improving the vacuum of the exhaust steam device. The key of the water replenishing atomization system of the exhaust steam device lies in the design and arrangement of the atomizing nozzles. The diameter, injection pressure, injection angle, exhaust steam flow rate and nozzle arrangement height of the atomizing nozzles not only affect the atomization effect, but also directly affect the coupled heat exchange effect between the steam and the atomized droplets. The water replenishment of the exhaust steam device is one of the important factors affecting the vacuum degree of the exhaust steam device. In order to reduce the heat load of the exhaust steam device and improve the thermal efficiency of the unit, it is planned to add a set of atomizing nozzles at the throat of the exhaust steam device. Through contact heat transfer, part of the steam condensation heat can be absorbed, so that the supplemented demineralized water is fully mixed in the exhaust steam device, thereby reducing the heat load of the surface exhaust steam device and improving the vacuum. This device is simple to refit, requires no maintenance during operation, has low investment, and has remarkable economic benefits, and the power generation coal consumption is reduced by 0.2 - 1.0 g / (kW·h) on average.

[0003] The exhaust steam device is an important auxiliary machine of a thermal power unit. As the cold end of the unit, the working effect of the condensing equipment will directly affect the safety and economy of the unit. By adopting a water replenishing atomization system, the mixed heat exchange between the exhaust steam and the water replenishment can be promoted to the greatest extent, and the heat exchange area between the exhaust steam and the chemical water replenishment can be increased, which is beneficial to enhancing the heat transfer effect and improving the vacuum of the exhaust steam device. The key of the water replenishing atomization system of the exhaust steam device lies in the design and arrangement of the atomizing nozzles. The diameter, injection pressure, injection angle, exhaust steam flow rate and nozzle arrangement height of the atomizing nozzles not only affect the atomization effect, but also directly affect the coupled heat exchange effect between the steam and the atomized droplets.

[0004] Therefore, in view of the above problems, a water replenishing system for an efficient exhaust steam device is proposed. Content of the Utility Model

[0005] In order to make up for the deficiencies of the existing technology, the exhaust steam device is an important auxiliary machine of a thermal power unit. As the cold end of the unit, the working effect of the condenser equipment will directly affect the safety and economy of the unit. By adopting a make-up water atomization system, the mixing heat transfer between the exhaust steam and the make-up water can be maximally promoted, the heat transfer area between the exhaust steam and the chemical make-up water can be increased, which is beneficial to enhancing the heat transfer effect and improving the vacuum of the exhaust steam device. The key to the make-up water atomization system of the exhaust steam device lies in the design and arrangement of the atomizing nozzles. The diameter, injection pressure, injection angle, exhaust steam flow rate, and nozzle arrangement height of the atomizing nozzles not only affect the atomization effect but also directly affect the coupling heat transfer effect between the steam and the atomized droplets.

[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows: An efficient make-up water system for an exhaust steam device of the present utility model includes a make-up water control valve assembly for the exhaust steam device. The end of the make-up water control valve assembly for the exhaust steam device is fixedly connected with a water distribution pipe, and the outer wall of the water distribution pipe is threadedly connected with a make-up water atomizing nozzle for the exhaust steam device. And an exhaust device is arranged outside the make-up water atomizing nozzle for the exhaust steam device; The make-up water control valve assembly for the exhaust steam device includes a water inlet pipe. The end of the water inlet pipe is fixedly connected with a water pump, and a water outlet pipe is fixedly connected to the side of the water pump. And a control valve body is fixedly connected to the outer wall of the water outlet pipe. The end of the water outlet pipe is fixedly connected with a threaded connecting pipe, and a nut is threadedly connected to the outer wall of the threaded connecting pipe. And a conduit is snap-connected to the end of the threaded connecting pipe.

[0007] Preferably, the water inlet pipe and the water pump form a communicating structure, and the model of the water pump is set as an IS150-125-250 demineralized water pump.

[0008] Preferably, the water pump and the water outlet pipe form a communicating structure, and the control valve body and the water outlet pipe are arranged with their vertical central axes coinciding.

[0009] Preferably, the threaded connecting pipe and the water outlet pipe are arranged with their vertical central axes coinciding, and the threaded connecting pipe and the water outlet pipe form a communicating structure.

[0010] Preferably, the conduit and the threaded connecting pipe form a snap-connection structure, and the threaded connecting pipe and the nut form a thread-detachable structure.

[0011] Preferably, the conduit and the water distribution pipe form a communicating structure, and the conduit and the water distribution pipe are integrally provided.

[0012] Preferably, the make-up water atomizing nozzle for the exhaust steam device and the water distribution pipe form a thread-detachable structure, and the make-up water atomizing nozzles for the exhaust steam device are arranged at equal intervals on the outer wall of the water distribution pipe.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The utility model can first increase the heat absorption of make-up water, increase the recovery of waste steam heat, reduce the cooling loss of the steam turbine, and reduce the subcooling degree of condensate; secondly, it can improve the deaeration effect of make-up water and improve the deaeration capacity of the entire regenerative system; finally, it can improve the back pressure of the unit and increase the thermal economy of the unit.

[0015] 2. The utility model is provided with a steam exhaust device make-up water atomizing nozzle connected by threads, which is convenient for replacing the nozzle separately during use, greatly improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the overall front view of the present utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the overall top view of the present utility model;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the overall front view of the present utility model in an open state;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the make-up water control valve assembly of the steam exhaust device of the present utility model;

[0021] Figure 5 For the present utility model Figure 4 It is a three-dimensional structural schematic diagram of the A part in the present utility model.

[0022] In the figure: 1. Make-up water control valve assembly of the steam exhaust device; 2. Make-up water atomizing nozzle of the steam exhaust device; 3. Exhaust device; 4. Water distribution pipe; 101. Water inlet pipe; 102. Water pump; 103. Water outlet pipe; 104. Control valve body; 105. Threaded connecting pipe; 106. Nut; 107. Conduit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0024] Example 1

[0025] Please refer to Figure 1 and Figure 5 as shown in a high-efficiency exhaust device water replenishment system, which includes an exhaust device water replenishment control valve assembly 1. A water distribution pipe 4 is fixedly connected to the end of the exhaust device water replenishment control valve assembly 1. An exhaust device water replenishment atomizing nozzle 2 is threadedly connected to the outer wall of the water distribution pipe 4. And an exhaust device 3 is arranged outside the exhaust device water replenishment atomizing nozzle 2; The exhaust device water replenishment control valve assembly 1 includes a water inlet pipe 101. A water pump 102 is fixedly connected to the end of the water inlet pipe 101. And a water outlet pipe 103 is fixedly connected to the side of the water pump 102. And a control valve body 104 is fixedly connected to the outer wall of the water outlet pipe 103. A threaded connection pipe 105 is fixedly connected to the end of the water outlet pipe 103. And a nut 106 is threadedly connected to the outer wall of the threaded connection pipe 105. And a conduit 107 is snap-connected to the end of the threaded connection pipe 105; The water inlet pipe 101 and the water pump 102 form a communicating structure. And the model of the water pump 102 is set as an IS150-125-250 desalting water pump; The water pump 102 and the water outlet pipe 103 form a communicating structure. And the control valve body 104 and the water outlet pipe 103 are arranged with their vertical central axes coinciding; The threaded connection pipe 105 and the water outlet pipe 103 are arranged with their vertical central axes coinciding. And the threaded connection pipe 105 and the water outlet pipe 103 form a communicating structure; The conduit 107 and the threaded connection pipe 105 form a snap connection structure. And the threaded connection pipe 105 and the nut 106 form a thread detachable structure; The conduit 107 and the water distribution pipe 4 form a communicating structure. And the conduit 107 and the water distribution pipe 4 are integrally arranged; The exhaust device water replenishment atomizing nozzle 2 and the water distribution pipe 4 form a thread detachable structure. And the exhaust device water replenishment atomizing nozzles 2 are arranged at equal intervals on the outer wall of the water distribution pipe 4.

[0026] Working principle: When it is necessary to replenish water to the exhaust device 3, turn on the water pump 102 to draw water from the outside through the water inlet pipe 101. The water pump 102 is an IS150-125-250 desalting water pump. The desalting water pump is used to remove water with calcium and magnesium ions. Generally, it is used for the cooling water of the mechanical seal of the machine pump to avoid scaling. It can also be used for electro-de-salting water injection. Then open the control valve body 104 to allow the desalted water to enter the water distribution pipe 4 through the water outlet pipe 103, the threaded connection pipe 105 and the conduit 107. After the water is atomized by the exhaust device water replenishment atomizing nozzle 2, it is sprayed into the exhaust device 3. By making the atomized desalted water fully combine with the exhaust steam of the low-pressure cylinder, the effect of improving water replenishment and deoxidation is achieved, and the deoxidation ability of the entire regenerative system is improved; The purpose of improving the back pressure of the unit and increasing the thermal economy of the unit is achieved. When the exhaust device water replenishment atomizing nozzle 2 is blocked or damaged, it can be disassembled through the thread of the exhaust device water replenishment atomizing nozzle 2 itself. Then replace it with a new exhaust device water replenishment atomizing nozzle 2 and continue to work.

[0027] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. An efficient steam exhaust device water replenishment system, characterized in that: It includes a make-up water control valve assembly (1) for the exhaust device. A water distribution pipe (4) is fixedly connected to the end of the make-up water control valve assembly (1) for the exhaust device. An exhaust device make-up water atomizing nozzle (2) is threadedly connected to the outer wall of the water distribution pipe (4). And an exhaust device (3) is arranged outside the exhaust device make-up water atomizing nozzle (2). The make-up water control valve assembly (1) for the exhaust device includes a water inlet pipe (101). A water pump (102) is fixedly connected to the end of the water inlet pipe (101). A water outlet pipe (103) is fixedly connected to the side of the water pump (102). A control valve body (104) is fixedly connected to the outer wall of the water outlet pipe (103). A threaded connection pipe (105) is fixedly connected to the end of the water outlet pipe (103). A nut (106) is threadedly connected to the outer wall of the threaded connection pipe (105). And a conduit (107) is snap-connected to the end of the threaded connection pipe (105).

2. The water replenishing system for an efficient exhaust steam device according to claim 1, wherein: The water inlet pipe (101) and the water pump (102) form a communicating structure. And the model of the water pump (102) is set as an IS150-125-250 demineralized water pump.

3. The water replenishing system for an efficient exhaust device according to claim 1, wherein: The water pump (102) and the water outlet pipe (103) form a communicating structure. And the control valve body (104) and the water outlet pipe (103) are arranged with their vertical central axes coinciding.

4. The water replenishing system for an efficient exhaust device according to claim 1, characterized in that: The threaded connection pipe (105) and the water outlet pipe (103) are arranged with their vertical central axes coinciding. And the threaded connection pipe (105) and the water outlet pipe (103) form a communicating structure.

5. The water replenishing system for an efficient exhaust device according to claim 1, wherein: The conduit (107) and the threaded connection pipe (105) form a snap connection structure. And the threaded connection pipe (105) and the nut (106) form a thread detachable structure.

6. The water replenishing system for an efficient exhaust steam device according to claim 1, wherein: The conduit (107) and the water distribution pipe (4) form a communicating structure. And the conduit (107) and the water distribution pipe (4) are integrally arranged.

7. The water replenishing system for an efficient exhaust steam device according to claim 1, characterized in that: The exhaust device make-up water atomizing nozzle (2) and the water distribution pipe (4) form a thread detachable structure. And the exhaust device make-up water atomizing nozzles (2) are arranged at equal intervals on the outer wall of the water distribution pipe (4).

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