CN214501194U - Arrangement structure of ultra-supercritical unit - Google Patents

Abstract

The utility model relates to a thermal power technical field discloses an arrangement structure of ultra supercritical unit, include between the deoxidization, oxygen-eliminating device, high pressure feed water heater and locate the external steam cooler of high pressure feed water heater top, oxygen-eliminating device and high pressure feed water heater all locate in between the deoxidization. The utility model provides a prior art need set up one set of water level monitoring again and drainage of emergency is transferred the valves and is solved external steam cooler's urgent drainage to lead to the higher problem of cost.

Description

Arrangement structure of ultra-supercritical unit

Technical Field

The utility model relates to a thermal power technology field especially relates to an arrangement structure of ultra supercritical unit.

Background

At present, an ultra-supercritical unit of a thermal power plant is generally provided with an independent external steam cooler outside a final-stage high-pressure heater, and the purpose is to utilize the superheat degree of reheated steam to improve the water supply temperature at the outlet of a first-stage high-pressure heater. When the device is arranged, whether a process system is safe and reliable and whether the flow is reasonable need to be considered, and how to reduce the basic cost of the device also needs to be considered.

As shown in fig. 1, a high-pressure heater 1a in the related art is disposed on a deaerator layer 3a on the same layer as the deaerator 2a, and an external steam cooler 4a of the high-pressure heater 1a is disposed at a lower level on a running layer 5a having a lower level than the deaerator layer 3 a. This solution has the following drawbacks: if the pressure difference between the high-pressure heater 1a and the external steam cooler 4a is small, the emergency drainage of the external steam cooler 4a cannot be automatically discharged into the high-pressure heater 1a and needs to be discharged into a condenser (not shown in the figure), so that a set of water level monitoring and emergency drainage valve group needs to be arranged, and the scheme is high in cost due to the fact that extra equipment is needed.

Based on the above shortcoming of prior art, the utility model discloses an optimize external steam cooler's arrangement to reach the purpose of saving the cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides an arrangement structure of ultra supercritical unit for solve the higher problem of prior art cost.

In order to solve the technical problem, the utility model provides an arrangement structure of ultra supercritical unit, include between the deoxidization, oxygen-eliminating device, high pressure feed water heater and locate the external steam cooler of high pressure feed water heater top, oxygen-eliminating device and high pressure feed water heater all locate in between the deoxidization.

Preferably, the high-pressure heater and the deaerator are arranged on the same line.

Preferably, the external steam cooler is arranged right above the high-pressure heater.

Preferably, a deaerator operating platform is arranged above the deaerating room, and the external steam cooler is arranged on the deaerator operating platform.

Implement the utility model discloses an arrangement structure of ultra supercritical unit compares with prior art, and its beneficial effect lies in:

because locate external steam cooler the top of high pressure feed water heater, consequently when the pressure differential between the two is lower, the hydrophobic shortcoming of meeting an urgent need again to set up water level monitoring and the hydrophobic valve unit of meeting an urgent need among the prior art in directly inserting the high pressure feed water heater through the action of gravity, has avoided the additional accessory equipment cost of external steam cooler to have reduceed greatly. In addition, because the high pressure feed water heater directly locates in the deoxidization room, can reduce the pipe connection tubular product between high pressure feed water heater and the deoxidization ware for the pipe connection is short swift smooth and easy, further reduces the auxiliary assembly expense.

Drawings

FIG. 1 is a schematic diagram of a prior art configuration;

fig. 2 is a schematic structural diagram of an embodiment of the present invention.

In the figure, the position of the upper end of the main shaft,

1a, a high-pressure heater, 2a, a deaerator, 3a, a deaerator layer, 4a and an external steam cooler;

1b, a high-pressure heater, 2b, a deaerator, 3b, a deaerator layer, 4b and an external steam cooler;

5a, a running layer, 6b, a deaerating room, 7b and a deaerator operating platform.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

With reference to fig. 1, an embodiment of the present invention provides an arrangement structure of an ultra supercritical unit, including an external steam cooler 4b above a deaerating chamber 6b, a high pressure heater 1b and a high pressure heater 1b, the high pressure heater 1b is arranged in the deaerating chamber 6 b.

Based on above technical scheme, the embodiment of the utility model discloses an arrangement structure of ultra supercritical unit, it is because locate high pressure heater 1 b's top with external steam cooler 4b, consequently when pressure differential between the two is lower, external steam cooler 4 b's critical drainage is direct to be inserted into high pressure heater 1b through the action of gravity in, has avoided needing to set up the shortcoming of water level monitoring and critical drainage valve group (not shown in the figure) again in addition among the prior art, has reduceed external steam cooler 4 b's accessory equipment expense greatly. In addition, because high pressure feed water heater 1b directly locates in the deoxidization room 6b, can reduce the pipe connection tubular product between high pressure feed water heater 1b and the deoxidization ware 2b for the pipe connection is short and swift smooth, further reduces the auxiliary assembly expense.

Preferably, the high-pressure heater 1b is provided on the side of the deaerator 2b in the deaerating compartment 6b, and specifically, both the high-pressure heater 1b and the deaerator 2b are arranged on the deaerating layer 3 b.

Preferably, the external steam cooler 4b is disposed right above the high-pressure heater 1b, the pipe connection length therebetween can be reduced, and the utilization efficiency of the external steam cooler 4b can be further improved because the pipe connection length is the shortest path immediately above.

External steam cooler 4b can directly locate high pressure feed water heater 1 b's top, need not to set up independent support frame and support external steam cooler 4b, preferably, external steam cooler 4b is located on the oxygen-eliminating device operation platform 7b of 6b top between the deoxidization, realize external steam cooler 4b and oxygen-eliminating device operation platform 7b combined use, make the structure more compact, in the implementation, only need with originally the oxygen-eliminating device operation platform extend once can, need not plus other support frames, save the cost.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims (4)

1. The utility model provides an arrangement structure of ultra supercritical unit, its characterized in that, includes between the deoxidization, oxygen-eliminating device, high pressure feed water heater and locates the external steam cooler of high pressure feed water heater top, oxygen-eliminating device and high pressure feed water heater all locate in between the deoxidization.

2. The arrangement structure of the ultra supercritical unit according to claim 1, wherein the high pressure heater and the deaerator are arranged on the same line.

3. The arrangement structure of the ultra supercritical unit according to claim 2, characterized in that the external steam cooler is provided right above the high pressure heater.

4. The arrangement structure of the ultra-supercritical unit according to claim 3, characterized in that a deaerator operation platform is arranged above the deaerator room, and the external steam cooler is arranged on the deaerator operation platform.

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