CN205784671U - A kind of condenser high temperature water charging system - Google Patents

Abstract

A high-temperature water supply system for a condenser, comprising a condenser and a high-temperature water supply device, the high-temperature water supply device is composed of a water supply pipe, a connecting pipe and a spraying mechanism, the water supply pipe is connected from the throat of the condenser or a hot well, and connected from the throat When it enters, it goes around to the hot well in the shell, and the spraying mechanism is set in the hot well of the condenser, above the liquid level in the hot well, and keeps a short distance above the liquid level of the hot well of the condenser to inject high-temperature water in a multi-point manner. Spraying to the liquid level of the hot well, avoiding the steam turbine exhaust flowing in the throat of the condenser when the high-temperature replenishment water is connected, and keeping the liquid level of the hot well stable when spraying to the liquid level of the hot well, which not only realizes a reasonable replenishment method of high-temperature water, It is also possible to reduce the subcooling.

Description

A high temperature water supply system for condenser

technical field

The utility model relates to the field of water-cooling units in thermal power plants, in particular to a high-temperature water supply system and method for a condenser.

Background technique

At present, in the design of the condenser of the wet cooling unit, the water replenishment technology of the condenser is a very important part. Normally, the make-up water temperature is lower than the exhaust steam temperature of the steam turbine. At this time, the make-up water is connected from the throat, sprayed into the condenser after atomization, and flows into the condenser shell together with the steam flow, which is good for cooling the exhaust steam of the steam turbine. . However, when the make-up water temperature is higher than the exhaust steam temperature of the steam turbine, if it is still sprayed into the condenser from the throat, the high-temperature water added will heat the exhaust steam of the turbine, which is detrimental to the cooling effect of the condenser. If it is directly connected to the hot well of the condenser through the pipeline, not only the noise will be large, but also the liquid level in the hot well will be unstable. When the steam turbine unit is in normal operation, the liquid level in the condenser is monitored in real time. When the liquid level fluctuates unstable, it is easy to cause the monitoring system to mistakenly recognize that the liquid level is abnormal and give an alarm, which may cause a failure of the entire generator set. Protect. At present, in waste heat utilization power plants, this kind of high temperature replenishment is very common. In the future, with the in-depth work of energy saving and consumption reduction in thermal power generation, conventional thermal power plants will also encounter such high-temperature replenishment water situations. How to effectively connect the high-temperature replenishment water to the condenser is a problem that needs to be solved at present.

Utility model content

The purpose of this utility model is to provide a system and method for rationally utilizing waste heat at the cold end (circulating water/exhaust steam) of a power plant, improving energy utilization efficiency, and realizing high-temperature supplementary water access to a condenser.

In order to achieve the above object, the technical solution of the present utility model is: a high temperature water supply system for a condenser, including a condenser and a high temperature water supply device; it is characterized in that the high temperature water supply device is composed of a water supply pipe, a connecting pipe and a spraying mechanism, The mechanism is arranged in the hot well of the condenser, located above the liquid level in the hot well, and connected with the water supply pipe through the connecting pipe.

Further, the water supply pipe is connected from the throat of the condenser or the hot well.

Further, when the water supply pipe is connected from the throat, the connecting pipe is extended from the side wall of the condenser shell to the hot well, keeping a certain distance from the side wall of the condenser shell, and the distance is chosen to be 50-100mm.

Further, the connecting pipe is composed of one section of straight pipe, or connected by multiple sections of straight pipe.

Furthermore, the spraying mechanism is arranged in parallel in the hot well, keeping a certain distance from the liquid surface.

Furthermore, the spraying mechanism can be formed by coiling a water pipe above the horizontal plane, or it can be formed by arranging multiple sets of water pipes in parallel.

Further, there are a plurality of water spray holes at the part facing the direction of hot well water under the water pipe of the spray mechanism.

The utility model adopts the high-temperature replenishment water connected to the hot well for spraying and spraying to realize the high-temperature replenishment of the condenser, realizes a reasonable replenishment method of high-temperature water, and is also a measure for energy saving and consumption reduction.

Description of drawings

Fig. 1 Schematic diagram of high temperature replenishment water structure of condenser;

Among them, 1 condenser throat, 2 hot well, 3 water supply pipe, 4 connecting pipe, 5 spraying mechanism

detailed description

The utility model will be further described below in conjunction with accompanying drawing 1, and it should be understood that the content described here is only for illustrating and explaining the utility model, and is not intended to limit the utility model.

The structural diagram of the high-temperature water replenishment device of the condenser is shown in Figure 1. The high-temperature water replenishment device of the condenser includes a water replenishment pipe, a connecting pipe and a spraying mechanism. To connect, the spraying mechanism is horizontally located in the hot well of the condenser, keeping a certain distance above the liquid level in the hot well. The spraying mechanism can be formed by coiling a water pipe in a horizontal plane, or it can be composed of multiple groups of water pipes arranged in parallel. Holes are drilled at the lower part of the water pipe of the sprinkler mechanism (towards the hot well water direction), and the number of holes is determined according to the amount of supplemented water. When the water supply pipe is connected from the throat, it should be wound to the hot well in the shell. The water supply pipe is connected from the throat, and it is extended to the hot well through the connecting pipe, keeping a certain distance from the inner wall of the steam side of the condenser, and the connecting pipe is arranged in a roughly vertical manner, which can be composed of a straight pipe or multiple straight pipes The connection structure is arranged to keep a certain distance from the inner wall of the condenser, 50-100mm is optional, and will not interfere with other structures inside the condenser. In addition, the water supply pipe can also be connected directly from the hot well (not shown), avoiding the installation of pipes inside the condenser.

Connect the high-temperature replenishment water from the throat of the condenser or the hot well through the replenishment pipe, extend the pipeline to about 300mm above the normal liquid level of the hot well, and arrange one or several pipes horizontally above the hot well, and below it (Towards the direction of the hot well water) parts are perforated, so that high-temperature replenishment water is sprayed from the small holes and sprayed onto the liquid surface of the hot well. In this way, when high-temperature water is added to the condenser, it will not affect the exhaust steam flow of the steam turbine at the throat of the condenser, and will not affect the normal cooling of the condenser; the high-temperature replenishment water can be sprayed at multiple points near the liquid surface of the hot well , there is almost no noise, and it will not cause the hot well liquid level to be unstable. In addition, the added high-temperature water can heat the hot well water and reduce the subcooling degree of the condenser, thereby reducing the heating steam consumption of the condensate recovery system. This method of replenishing water is not only a reasonable method of replenishing water for high-temperature water, but also an energy-saving and consumption-reducing measure. It not only completely solves the utilization problem of high-temperature make-up water, but also provides a good solution for the power plant to make full use of surrounding resources according to local conditions.

Finally, it should be noted that: the above is only an explanation of the utility model, and is not intended to limit the utility model. Although the utility model has been described in detail, for those skilled in the art, it can still understand the aforementioned Modifications are made to the technical solutions recorded, or equivalent replacements are made to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (7)

1. A condenser high-temperature replenishment system, comprising a condenser and a high-temperature replenishment device; it is characterized in that the high-temperature replenishment device is composed of a replenishment pipe, a connecting pipe and a spraying mechanism, and the spraying mechanism is arranged in the hot well of the condenser, located in the hot Above the liquid level in the well, it is connected with the water supply pipe through the connecting pipe. 2. The condenser high-temperature replenishment water system according to claim 1, characterized in that the replenishment pipe is connected from the throat of the condenser or a hot well. 3. The condenser high-temperature replenishment water system according to claim 2, characterized in that, when the replenishment pipe is connected from the throat, the connecting pipe extends from the side wall of the condenser shell to the hot well, and the distance from the condenser shell Keep a certain distance from the side wall of the body, the distance is 50-100mm. 4. The condenser high-temperature replenishment water system according to claim 3, characterized in that the connecting pipe is composed of a section of straight pipe, or is composed of multiple sections of straight pipe connected. 5. The condenser high-temperature replenishment water system according to claim 1, characterized in that the spraying mechanism is arranged in parallel in the hot well and keeps a certain distance from the liquid surface. 6. The high-temperature replenishment water system for the condenser according to claim 5, wherein the spraying mechanism can be formed by coiling a water pipe above the horizontal plane, or can be formed by multiple groups of water pipes arranged in parallel. 7. The high-temperature replenishment water system for condenser according to claim 5, characterized in that there are multiple water spray holes at the part below the water pipe of the spraying mechanism facing the direction of the hot well water.