阅读说明：本技术 火力发电机组 (Thermal power generation unit ) 是由 宁志 吴志祥 王清华 王家杰 潘秀兰 李焱 王文虎 于 2019-08-05 设计创作，主要内容包括：本发明公开一种火力发电机组,包括第一高压加热器、第二高压加热器、第三高压加热器、第四高压加热器、前置泵和除氧器,第一高压加热器的第一疏水管和第二高压加热器的第二疏水管并联、且均与第三高压加热器的汽侧相连通,第三高压加热器的第三疏水管与第四高压加热器的汽侧相连通,第四高压加热器的第四疏水管与除氧器连通,第三疏水管与前置泵相连,第一高压加热器的汽侧设置有第一加氧机构,第二高压加热器的汽侧设置有第二加氧机构,第四高压加热器的汽侧设置有第三加氧机构。上述方案能解决目前的火力发电机组存在向高压加热器内加氧存在效果不佳的问题。(The present invention discloses a kind of thermal power generation unit, including the first high-pressure heater, second high-pressure heater, third high-pressure heater, 4th high-pressure heater, fore pump and oxygen-eliminating device, first drain pipe of the first high-pressure heater and the second drain pipe of the second high-pressure heater are in parallel, and it is connected with the vapour side of third high-pressure heater, the third drain pipe of third high-pressure heater is connected with the vapour side of the 4th high-pressure heater, 4th drain pipe of the 4th high-pressure heater is connected to oxygen-eliminating device, third drain pipe is connected with fore pump, the vapour side of first high-pressure heater is provided with the first oxygenation mechanism, the vapour side of second high-pressure heater is provided with the second oxygenation mechanism, the vapour side of 4th high-pressure heater is provided with third oxygenation mechanism.Above scheme, which can solve current thermal power generation unit, has that there are ineffective for oxygenation into high-pressure heater.)

1. a kind of thermal power generation unit, which is characterized in that including the first high-pressure heater (100), the second high-pressure heater (200), third high-pressure heater (300), the 4th high-pressure heater (400), fore pump (500) and oxygen-eliminating device (600), described The first drain pipe (110) of one high-pressure heater (100) and the second drain pipe (210) of second high-pressure heater (200) It is in parallel and be connected with the vapour side of the third high-pressure heater (300), the third of the third high-pressure heater (300) Drain pipe (310) is connected with the vapour side of the 4th high-pressure heater (400), and the of the 4th high-pressure heater (400) Four drain pipes (410) are connected to the oxygen-eliminating device (600), and third drain pipe (310) is connected with the fore pump (500), described The vapour side of first high-pressure heater (100) is provided with the first oxygenation mechanism (120), the vapour of second high-pressure heater (200) Side is provided with the second oxygenation mechanism (220), and the vapour side of the 4th high-pressure heater (400) is provided with third oxygenation mechanism (420)。

2. thermal power generation unit according to claim 1, which is characterized in that first high-pressure heater (100) includes First pump-line or the first vapour lateral pressure table, first pump-line or the first vapour lateral pressure table are provided with first and add Oxygen testing agency, first oxygenation testing agency are used to detect the oxygen-adding amount of first oxygenation mechanism (120).

3. thermal power generation unit according to claim 1, which is characterized in that second high-pressure heater (200) includes Second is provided on second pump-line or the second vapour lateral pressure table, second pump-line or the second vapour lateral pressure table Oxygenation testing agency, second oxygenation testing agency are used to detect the oxygen-adding amount of second oxygenation mechanism (220).

4. thermal power generation unit according to claim 1, which is characterized in that the 4th high-pressure heater (400) includes Third is provided on third pump-line or third vapour lateral pressure table, the third pump-line or the third vapour lateral pressure table Oxygenation testing agency, third oxygenation testing agency are used to detect the oxygen-adding amount of third oxygenation mechanism (320).

5. thermal power generation unit according to claim 1, which is characterized in that the of the third high-pressure heater (300) Three drain pipes (310) are provided with the first oxygen table, and the first oxygen table detects the oxygen content in the third drain pipe (310).

6. thermal power generation unit according to claim 1, which is characterized in that the of the 4th high-pressure heater (400) Four drain pipes (410) are provided with the second oxygen table, and the second oxygen table detects the oxygen content in the 4th drain pipe (410).

7. thermal power generation unit according to claim 1, which is characterized in that further include third oxygen table, the third oxygen table It is connected to by the first connection tube with the third drain pipe (310), the third oxygen table passes through the second connection tube and the described 4th Drain pipe (410) connection, first connection tube and second connection tube are provided with switch valve.

8. thermal power generation unit according to claim 7, which is characterized in that it further include cooler, the cooler and institute State being integrally attached to for the first connection tube, second connection tube, the switch valve and third oxygen table formation.

9. thermal power generation unit according to claim 1, which is characterized in that first oxygenation mechanism (120), described Dioxygenase mechanism (220) and third oxygenation mechanism (420) are negative-pressure adsorption air mechanism.

10. thermal power generation unit according to claim 1 to 9, which is characterized in that the thermal power generation unit For extra-supercritical unit.

Technical field

The present invention relates to electric power factory equipment technical field more particularly to a kind of thermal power generation units.

Background technique

The water supply system of the thermal power generation unit of power plant uses all-volatile treatment technique (AVT) at present, all-volatile treatment work The inner metal surface of constitution equipment and pipeline that skill will lead to water supply system when carrying out forms Fe₃O₄Oxide layer, Fe₃O₄Oxygen Change that layer is more loose, and solubility is higher, it is (such as high plus tube sheet, high plus dredge that position jumpy especially occurs in water flow Water valve etc.), obscission is more serious, so that the surface of these positions is almost without the oxidation film for protection, finally Cause the corrosion of these positions more serious, therefore the metallic matrix of each component part of water supply system can not be protected, to influence The normal operation of thermal power generation unit.

In order to alleviate above-mentioned technical problem, oxygenation (is added and sets usually in the water supply system of thermal power generation unit at present Determine concentration oxygen or air) so that the surface of the metallic matrix of the constitution equipment and pipeline of water supply system is formed Fe₂O₃Oxide layer, Fe₂O₃There is even compact in oxide layer, solubility is lower, therefore have preferable protection Metal Substrate The performance of body finally can effectively inhibit the corrosion of the pipeline of water supply system, it is seen then that oxygenation is able to solve all-volatile treatment technique A series of existing etching problems.Currently, the thermal power generation unit of more and more thermal power plants uses oxygenation to its water supply system Measure, and achieve and promote the safe and economic operation and energy-saving remarkable result.

The automatic combined water treatment of full guard, by carrying out oxygenation to the vapour side of high-pressure heater, while to oxygen-eliminating device The oxygen of low concentration is added in down-comer and condensate pump entrance, and then becomes unique both at home and abroad and realize water supply system and draining system The austenitic steel oxide skin for being effectively protected simultaneously, while reducing superheater and reheater falls off the technology of risk.

Current thermal power generation unit is all to carry out oxygenation from the vapour side of the first high-pressure heater during oxygenation, Then pass through the hydrophobic vapour side for being added to the second high-pressure heater of the first high-pressure heater, then dredging from the second high-pressure heater Water is added to the vapour side of third high-pressure heater.But in a kind of relevant thermal power generation unit, the second high-pressure heater and third Drain pipe between high-pressure heater is connected with fore pump, in such cases, under some conditions, from the second high-pressure heater The oxygen of drain pipe conveying cannot be introduced into third high-pressure heater, eventually result in oxygenation problem not in place.

Summary of the invention

The present invention discloses a kind of thermal power generation unit, exists to solve current thermal power generation unit into high-pressure heater Oxygenation there is a problem of ineffective.

To solve the above-mentioned problems, the present invention adopts the following technical solutions:

A kind of thermal power generation unit, including the first high-pressure heater, the second high-pressure heater, third high-pressure heater, Four high-pressure heaters, fore pump and oxygen-eliminating device, the first drain pipe of first high-pressure heater and second hyperbaric heating Second drain pipe of device is in parallel and is connected with the vapour side of the third high-pressure heater, the third high-pressure heater Third drain pipe is connected with the vapour side of the 4th high-pressure heater, the 4th drain pipe of the 4th high-pressure heater and institute Oxygen-eliminating device connection is stated, third drain pipe is connected with the fore pump, and the vapour side of first high-pressure heater is provided with first and adds Oxygen mechanism, the vapour side of second high-pressure heater are provided with the second oxygenation mechanism, and the vapour side of the 4th high-pressure heater is set It is equipped with third oxygenation mechanism.

Preferably, in above-mentioned thermal power generation unit, first high-pressure heater includes the first pump-line or the first vapour Lateral pressure table, first pump-line or the first vapour lateral pressure table are provided with the first oxygenation testing agency, and described first Oxygenation testing agency is used to detect the oxygen-adding amount of first oxygenation mechanism.

Preferably, in above-mentioned thermal power generation unit, second high-pressure heater includes the second pump-line or the second vapour It is provided with the second oxygenation testing agency on lateral pressure table, second pump-line or the second vapour lateral pressure table, described Dioxygenase testing agency is used to detect the oxygen-adding amount of second oxygenation mechanism.

Preferably, in above-mentioned thermal power generation unit, the third high-pressure heater includes third pump-line or third vapour It is provided with third oxygenation testing agency on lateral pressure table, the third pump-line or the third vapour lateral pressure table, described Three oxygenation testing agencies are used to detect the oxygen-adding amount of third oxygenation mechanism.

Preferably, in above-mentioned thermal power generation unit, the third drain pipe of the third high-pressure heater is provided with the first oxygen Table, the first oxygen table detect the oxygen content in the third drain pipe.

Preferably, in above-mentioned thermal power generation unit, the 4th drain pipe of the 4th high-pressure heater is provided with the second oxygen Table, the second oxygen table detect the oxygen content in the 4th drain pipe.

Preferably, further include third oxygen table in above-mentioned thermal power generation unit, the third oxygen table by the first connection tube with The third drain pipe connection, the third oxygen table are connected to by the second connection tube with the 4th drain pipe, first rank Adapter tube and second connection tube are provided with switch valve.

It preferably, further include cooler in above-mentioned thermal power generation unit, the cooler and first connection tube, institute State being integrally attached to for the second connection tube, the switch valve and third oxygen table formation.

Preferably, in above-mentioned thermal power generation unit, first oxygenation mechanism, second oxygenation mechanism and the third Oxygenation mechanism is negative-pressure adsorption air mechanism.

Preferably, in above-mentioned thermal power generation unit, the thermal power generation unit is extra-supercritical unit.

The technical solution adopted by the present invention can reach it is following the utility model has the advantages that

Thermal power generation unit disclosed by the invention, the first oxygenation mechanism and the second oxygenation mechanism are respectively to the first hyperbaric heating Device and the equal oxygenation of the second high-pressure heater, thus realize the protection to the first high-pressure heater and the second high-pressure heater, meanwhile, The hydrophobic carrying oxygen of first high-pressure heater and the second high-pressure heater enters in third high-pressure heater, to realize to the The protection of three high-pressure heaters.Meanwhile third oxygenation mechanism carries out oxygenation to the 4th high-pressure heater, to avoid the 4th high pressure Heater under specific operation can not oxygenation, and then oxygenation effect can be improved, finally can be realized to all hyperbaric heatings The protection of device.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:

Fig. 1 is the partial structure diagram of thermal power generation unit disclosed by the embodiments of the present invention.

Description of symbols:

The first high-pressure heater of 100-, the first drain pipe of 110-, the first oxygenation of 120- mechanism,

The second high-pressure heater of 200-, the second drain pipe of 210-, the second oxygenation of 220- mechanism,

300- third high-pressure heater, 310- third drain pipe,

The 4th high-pressure heater of 400-, the 4th drain pipe of 410-, 420- third oxygenation mechanism,

500- fore pump,

600- oxygen-eliminating device.

Specific embodiment

To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.

Below in conjunction with attached drawing, technical solution disclosed in each embodiment that the present invention will be described in detail.

Referring to FIG. 1, the embodiment of the present invention discloses a kind of thermal power generation unit, disclosed thermal power generation unit includes the One high-pressure heater 100, the second high-pressure heater 200, third high-pressure heater 300, the 4th high-pressure heater 400, fore pump 500 and oxygen-eliminating device 600.

First high-pressure heater (i.e. No. 0 high-pressure heater) 100 has the first drain pipe 110, and the second high-pressure heater is (i.e. No. 1 high-pressure heater) 200 there is the second drain pipe 210, the first drain pipe 110 and the second drain pipe 210 are in parallel, and first is hydrophobic Pipe 110 and the second drain pipe 210 are connected with the vapour side of third high-pressure heater 300, thus by the first high-pressure heater 100 With the second high-pressure heater 200 generate it is hydrophobic being aggregated into third high-pressure heater 300, and pass through third high-pressure heater 300 continue to convey.In order to facilitate linking, a hydrophobic confluence can be aggregated into the first drain pipe 110 and the second drain pipe 210 Then pipe realizes the connection with third high-pressure heater 300 by hydrophobic collecting pipe.

Third high-pressure heater (i.e. No. 2 high-pressure heaters) 300 includes third drain pipe 310, third drain pipe 310 and the The vapour side of four high-pressure heaters (i.e. No. 3 high-pressure heaters) 400 is connected.First high-pressure heater 100 and the second hyperbaric heating Device 200 is pooled to the hydrophobic third drain pipe 310 for eventually passing through third high-pressure heater 300 of third high-pressure heater 300 It is transported away.

4th high-pressure heater 400 includes the 4th drain pipe 410, and the 4th drain pipe 410 is connected to oxygen-eliminating device 600, and the 4th 4th drain pipe 410 of high-pressure heater 400 finally hydrophobic is transported to what is collected in oxygen-eliminating device 600.

Third drain pipe 310 is connected with fore pump 500, and fore pump 500 and the 4th high-pressure heater 400 are connected in parallel On three drain pipes 310, under a kind of operating condition, the hydrophobic of the conveying of third drain pipe 310 can enter the 4th high-pressure heater 400 In；Under another operating condition, hydrophobic can enter in fore pump 500 of the conveying of third drain pipe 310, in such cases, third The oxygen for the hydrophobic middle carrying that drain pipe 310 conveys cannot be introduced into the 4th high-pressure heater 400.

In embodiments of the present invention, the vapour side of the first high-pressure heater 100 is provided with the first oxygenation mechanism 120, and second is high The vapour side of pressure heater 200 is provided with the second oxygenation mechanism 220, and the vapour side of the 4th high-pressure heater 400 is provided with third oxygenation Mechanism 420.First oxygenation mechanism 120, the second oxygenation mechanism 220 and third oxygenation mechanism 420 can be realized the addition of oxygen, Under normal conditions, the first oxygenation mechanism 120, the second oxygenation mechanism 220 and third oxygenation mechanism 420 are by into corresponding pipeline Air is added, to achieve the purpose that oxygenation.

Thermal power generation unit disclosed by the embodiments of the present invention, the first oxygenation mechanism 120 and the second oxygenation mechanism 220 are right respectively 200 oxygenation of first high-pressure heater 100 and the second high-pressure heater, to realize high to the first high-pressure heater 100 and second The protection of heater 200 is pressed, meanwhile, the hydrophobic carrying oxygen of the first high-pressure heater 100 and the second high-pressure heater 200 enters In third high-pressure heater 300, to realize the protection to third high-pressure heater 300.Meanwhile third oxygenation mechanism 420 is right 4th high-pressure heater 400 carry out oxygenation, thus avoid the 4th high-pressure heater 400 under specific operation can not oxygenation, in turn Oxygenation effect can be improved, finally can be realized the protection to all high-pressure heaters.

In order to preferably observe the oxygenation effect of the first oxygenation mechanism 120, in more preferred scheme, the present invention is implemented Thermal power generation unit disclosed in example can also include the first oxygenation testing agency, and the first high-pressure heater 100 may include first Pump-line, the first oxygenation testing agency can be set on the first pump-line, and the first oxygenation testing agency is for detecting the The oxygen-adding amount of one oxygenation mechanism 120.Certainly, it is generally the case that the first high-pressure heater 100 generally includes the first vapour lateral pressure Table, the first oxygenation testing agency also can be set on the first vapour lateral pressure table.The embodiment of the present invention does not limit the inspection of the first oxygenation The specific setting position for surveying mechanism, as long as being able to detect the oxygen-adding amount of the first oxygenation mechanism 120.

In order to preferably observe the oxygenation effect of the second oxygenation mechanism 220, in more preferred scheme, the present invention is implemented Thermal power generation unit disclosed in example can also include the second oxygenation testing agency, and the second high-pressure heater 200 may include second Pump-line, the second oxygenation testing agency can be set on the second pump-line, and the second oxygenation testing agency is for detecting the The oxygen-adding amount of dioxygenase mechanism 220.Certainly, it is generally the case that the second high-pressure heater 200 generally includes the second vapour lateral pressure Table, the second oxygenation testing agency can be set on the second vapour lateral pressure table.The embodiment of the present invention does not limit the detection of the second oxygenation The specific setting position of mechanism, as long as being able to detect the oxygen-adding amount of the second oxygenation mechanism 220.

Similarly, in order to preferably observe the oxygenation effect of third oxygenation mechanism 420, in more preferred scheme, this hair Thermal power generation unit disclosed in bright embodiment can also include third oxygenation testing agency, and the 4th high-pressure heater 400 includes the The third in the 4th high-pressure heater 400 can be set in three pump-lines and third vapour lateral pressure table, third oxygenation testing agency On pump-line or third vapour lateral pressure table.Third oxygenation testing agency is used to detect the oxygen-adding amount of third oxygenation mechanism 320.

First oxygenation testing agency, the second oxygenation testing agency and third oxygenation testing agency are well-known device, inspection Details are not described herein for survey process and mechanism.

In order to more easily monitor oxygen content, in more preferred scheme, the third of third high-pressure heater 300 is dredged The first oxygen table has can be set in water pipe 310, and the first oxygen table detects the oxygen content in the third drain pipe 310.

In order to more easily monitor oxygen content, in more preferred scheme, the 4th of the 4th high-pressure heater 400 is dredged The second oxygen table has also can be set in water pipe 410, and the second oxygen table detects the oxygen content in the 4th drain pipe 410.

Thermal power generation unit disclosed by the embodiments of the present invention can also include third oxygen table, and third oxygen table can pass through first Connection tube is connected to third drain pipe 310, and third oxygen table can be connected to by the second connection tube with the 4th drain pipe 410, and first Connection tube and the second connection tube are provided with switch valve.By the switching control of switch valve, to realize third oxygen table detection the Three drain pipes 310 or the 4th drain pipe 410, in such cases, without specially in third drain pipe 310 and the 4th drain pipe 410 On configure third oxygen table, achieve the purpose that simplified structure, reduce cost.

Similarly, thermal power generation unit disclosed by the embodiments of the present invention can also include cooler, and cooler is connected with first What pipe, the second connection tube, switch valve and third oxygen table were formed is integrally attached to, so that being embodied as all parts implements cooling, thus Ensure the normal work of third oxygen table.Certainly, such mode integrally cooled down can undoubtedly simplify structure, more without configuring Cooler, and then can reduce cost.

In embodiments of the present invention, the first oxygenation mechanism 120, the second oxygenation mechanism 220 and third oxygenation mechanism 420 Think negative-pressure adsorption air mechanism, that is to say, that configure negative-pressure adsorption air mechanism in each oxygenation point, in the process of work It is drawn air into corresponding pipeline by negative pressure, to realize the purpose of oxygenation.

Thermal power generation unit disclosed by the embodiments of the present invention can be extra-supercritical unit, or it is other have it is above-mentioned It is first high-pressure heater 100, the second high-pressure heater 200, third high-pressure heater 300, the 4th high-pressure heater 400, preposition 500 isostructural thermal power generation units are pumped, the embodiment of the present invention does not limit the specific type of thermal power generation unit.

Emphasis describes the difference between each embodiment, difference between each embodiment in foregoing embodiments of the present invention As long as optimization feature non-contradiction, can combine to form more preferably embodiment, it is contemplated that style of writing is succinct, then no longer superfluous at this It states.

The above description is only an embodiment of the present invention, is not intended to restrict the invention.For those skilled in the art For, the invention may be variously modified and varied.All any modifications made within the spirit and principles of the present invention are equal Replacement, improvement etc., should be included within scope of the presently claimed invention.