CN111410255A - Vacuum thermal deoxidizing device for power plant condenser - Google Patents

Abstract

The utility model relates to a vacuum thermal deoxidizer used for a condenser of a power plant, which relates to the field of deaerator technology for condensers. The invention solves the problem that the dissolved oxygen in the condensed water exceeds the standard in the existing power plant system. The invention includes a vacuum thermal rotary spray block and a vacuum thermal rotary bubbling block. The main water supply pipeline of the vacuum thermal rotary spray block is horizontally arranged inside the upper part of the condenser, and the other end of the main water supply pipeline is connected to the power plant for water supply. The pipeline is connected, one end of the water supplement bypass pipeline is connected with the main water supply pipeline, the other end of the water supplement bypass pipeline is provided with a first nozzle with the opening direction facing downward, and the steam conveying main pipeline of the vacuum thermal rotary bubbling block is arranged horizontally in the condensation area. Inside the lower part of the steam generator, the other end of the steam conveying main pipeline is connected with the steam pipeline of the power plant, one end of the steam conveying bypass pipeline is connected with the main steam conveying pipeline, and the other end of the steam conveying bypass pipeline is provided with a second nozzle with an upward opening direction. The invention is used for vacuum thermal deoxygenation of condensers in power plants.

Description

A vacuum thermal deaerator for power plant condenser

technical field

The invention relates to the technical field of deoxidizing condensers, in particular to a vacuum thermal deoxidizing device for condensers in power plants.

Background technique

Dissolved oxygen in condensate water is one of the important indicators of chemical supervision in the power industry. If this indicator exceeds the standard level for a long time, it will cause serious harm to the safety and economy of systems and equipment. For example, the life of the equipment is shortened, the heat exchange efficiency of the regenerative system equipment is reduced, and the vacuum of the unit is affected, which reduces the safety of the system and cannot operate stably. Aiming at the problem that the dissolved oxygen in the condensate water exceeds the standard frequently occurred in the power plant system, the invention proposes a device for deoxidizing the power by vacuum heat in the condenser of the power plant.

To sum up, there is a problem that the dissolved oxygen in the condensate water exceeds the standard in the existing power plant system.

SUMMARY OF THE INVENTION

In order to solve the problem that the dissolved oxygen in the condensed water exceeds the standard in the existing power plant system, the present invention further provides a vacuum thermal deaerator for the condenser of the power plant.

The technical scheme of the present invention is:

A vacuum thermal deoxidizer for power plant condenser, which includes vacuum thermal rotary spray block and vacuum thermal rotary bubbling block, vacuum thermal rotary spray block and vacuum thermal rotary bubbling block The blocks are arranged inside the condenser in order from top to bottom;

The vacuum thermal rotary spray block includes a main water supply pipeline 11, a number of water supply bypass pipelines 12 and a number of first nozzles 13. The water supply main pipeline 11 is horizontally arranged inside the upper part of the condenser along the water running direction of the condenser cooling pipe. One end of the main pipe 11 is closed and overlapped on the rear truss of the condenser, and the other end of the water supply main pipeline 11 is overlapped on the front truss of the condenser and extends to the outside of the condenser to be connected with the water supply pipeline of the power plant, and several bypass pipelines for water supply 12 are evenly distributed on one side of the main water supply pipeline 11 along the horizontal direction, the water supply bypass pipeline 12 is vertically connected with the main water supply pipeline 11, one end of the water supply bypass pipeline 12 is connected with the main water supply pipeline 11, and the other end of the water supply bypass pipeline 12 is provided with the first nozzle 13, the opening direction of the first nozzle 13 is set downward;

The vacuum thermodynamic spiral bubbling block includes a steam delivery main pipeline 21, a plurality of steam delivery bypass pipelines 22, a number of second nozzles 23, a plurality of main pipeline support members 24 and a plurality of bypass pipeline support members 25, and the steam delivery main pipeline 21 is arranged horizontally inside the lower part of the condenser along the water running direction of the condenser cooling pipe, one end of the main steam conveying pipe 21 is closed and fixed on the bottom plate of the condenser through the support 24, and the other end of the main steam conveying pipe 21 passes through the support 24 It is fixed on the bottom plate of the condenser and extends to the outside of the condenser to be connected with the steam pipeline of the power plant. Several steam transport bypass pipes 22 are evenly distributed on both sides of the main steam transport pipe 21 in the horizontal direction. The steam transport bypass pipes 22 are connected to the steam transport pipe. The main pipeline 21 is connected vertically, one end of the steam transport bypass pipeline 22 is connected with the steam transport main pipeline 21, and the other end of the steam transport bypass pipeline 22 is provided with a second nozzle 23, and the opening direction of the second nozzle 23 is set upward, The steam delivery bypass duct 22 is secured to the condenser floor by bypass duct supports 25 .

Further, each main pipe support 24 includes a first support seat, a first support vertical plate and a plurality of first connection bolts, the first support seat is horizontally fixed on the condenser bottom plate by a plurality of first connection bolts, the first support seat is The lower end of a supporting vertical plate is vertically fixed at the center position of the upper end surface of the first supporting seat, and the upper end of the first supporting vertical plate is provided with a first arc-shaped groove matching with the main steam conveying pipeline 21 .

Further, each bypass pipe support 25 includes a second support seat, a second support vertical plate and a plurality of second connecting bolts, and the second support seat is horizontally fixed on the condenser bottom plate by a plurality of second connecting bolts, The lower end of the second supporting vertical plate is vertically fixed at the center position of the upper end surface of the second supporting seat, and the upper end of the second supporting vertical plate is provided with a second arc-shaped groove matching the steam conveying bypass pipe 22 .

Further, the first nozzle 13 and the second nozzle 23 are both dedicated deoxygenation vacuum thermodynamic swirling nozzles.

Further, it includes two main water supply pipes 11 , two main water supply pipes 11 are arranged in parallel, one end of each main water supply pipe 11 is closed, and the other end of each main water supply pipe 11 is respectively connected with the water supply pipeline of the power plant.

Further, it includes two main steam conveying pipes 21, the two main steam conveying pipes 21 are arranged in parallel, one end of each main steam conveying pipe 21 is closed, and the other end of each main steam conveying pipe 21 is respectively connected with the steam pipe of the power plant.

Further, a plurality of steam transport bypass pipes 22 are alternately arranged on both sides of the steam transport main pipe 21 .

Compared with the prior art, the present invention has the following effects:

1. The vacuum thermal rotary spray block (initial deaeration block) invented for the vacuum thermal deaerator of power plant condenser is located on the upper part of the condenser, and the vacuum thermal rotary bubbling block (deep deaerator block) is located in the upper part of the condenser. The block) is located at the lower part of the condenser hot well, which minimizes the oxygen content of the final condensed water, so that the dissolved oxygen in the condensed water in the power plant system reaches the standard.

2. According to the design boundary conditions, the invented vacuum thermal deaerator for condensers of power plants can set up multiple initial deaerator blocks and deep deaerator blocks, which is flexible, economical and easy to control.

3. The first nozzle and the second nozzle of the invented vacuum thermal deaerator for the condenser of the power plant are both dedicated deaerator vacuum thermal rotary nozzles. The connection between the pipelines, the second nozzle and the steam conveying bypass pipeline are all connected by means of threaded connection, which is convenient for installation and disassembly. And a sealing ring is set between the nozzle and the pipe to ensure the tightness.

4. Most of the vacuum thermal deoxidizers invented for condensers in power plants are located inside the condensers, and do not occupy extra space in the power plants alone.

Description of drawings

Fig. 1 is the front view of the vacuum thermodynamic rotary spray block of the present invention;

Fig. 2 is the side view of the vacuum thermodynamic rotary spray block of the present invention;

Fig. 3 is the top view of the vacuum thermodynamic rotary spray block of the present invention;

Fig. 4 is the front view of the vacuum thermodynamic rotary bubbling block of the present invention;

Fig. 5 is the side view of the vacuum thermodynamic rotary bubbling block of the present invention;

Fig. 6 is a top view of the vacuum thermodynamic rotary bubbling block of the present invention.

Detailed ways

Embodiment 1: This embodiment is described with reference to FIG. 1 to FIG. 6 . A vacuum thermal deaerator for power plant condensers of this embodiment includes a vacuum thermal rotary spray block and a vacuum thermal rotary drum. The bubble block, the vacuum thermal rotary spray block and the vacuum thermal rotary bubbling block are sequentially arranged inside the condenser from top to bottom;

The vacuum thermal rotary spray block includes a main water supply pipeline 11, a number of water supply bypass pipelines 12 and a number of first nozzles 13. The water supply main pipeline 11 is horizontally arranged inside the upper part of the condenser along the water running direction of the condenser cooling pipe. One end of the main pipe 11 is closed and overlapped on the rear truss of the condenser, and the other end of the water supply main pipeline 11 is overlapped on the front truss of the condenser and extends to the outside of the condenser to be connected with the water supply pipeline of the power plant, and several bypass pipelines for water supply 12 are evenly distributed on one side of the main water supply pipeline 11 along the horizontal direction, the water supply bypass pipeline 12 is vertically connected with the main water supply pipeline 11, one end of the water supply bypass pipeline 12 is connected with the main water supply pipeline 11, and the other end of the water supply bypass pipeline 12 is provided with the first nozzle 13, the opening direction of the first nozzle 13 is set downward;

The vacuum thermodynamic spiral bubbling block includes a steam delivery main pipeline 21, a plurality of steam delivery bypass pipelines 22, a number of second nozzles 23, a plurality of main pipeline support members 24 and a plurality of bypass pipeline support members 25, and the steam delivery main pipeline 21 is arranged horizontally inside the lower part of the condenser along the water running direction of the condenser cooling pipe, one end of the main steam conveying pipe 21 is closed and fixed on the bottom plate of the condenser through the support 24, and the other end of the main steam conveying pipe 21 passes through the support 24 It is fixed on the bottom plate of the condenser and extends to the outside of the condenser to be connected with the steam pipeline of the power plant. Several steam transport bypass pipes 22 are evenly distributed on both sides of the main steam transport pipe 21 in the horizontal direction. The steam transport bypass pipes 22 are connected to the steam transport pipe. The main pipeline 21 is connected vertically, one end of the steam transport bypass pipeline 22 is connected with the steam transport main pipeline 21, and the other end of the steam transport bypass pipeline 22 is provided with a second nozzle 23, and the opening direction of the second nozzle 23 is set upward, The steam delivery bypass duct 22 is secured to the condenser floor by bypass duct supports 25 .

Embodiment 2: This embodiment will be described with reference to FIG. 4 . Each main pipe support member 24 in this embodiment includes a first support seat, a first support vertical plate and a plurality of first connecting bolts. The first support seat passes through a plurality of The first connecting bolt is horizontally fixed on the bottom plate of the condenser, the lower end of the first supporting vertical plate is vertically fixed on the center position of the upper end face of the first supporting seat, and the upper end of the first supporting vertical plate is provided with a matching steam conveying main pipeline 21 The first arc-shaped groove. In this way, the main pipe support 24 plays a supporting role for the steam conveying main pipe 21, and at the same time, the main pipe support 24 is connected with the condenser bottom plate through a plurality of first connecting bolts, which is convenient for installation and disassembly. Other components and connection relationships are the same as in the first embodiment.

Embodiment 3: This embodiment is described with reference to FIG. 4 . Each bypass pipe support member 25 in this embodiment includes a second support seat, a second support vertical plate and a plurality of second connecting bolts. The second support seat passes through multiple A second connecting bolt is horizontally fixed on the bottom plate of the condenser, the lower end of the second supporting vertical plate is vertically fixed at the center position of the upper end face of the second supporting seat, and the upper end of the second supporting vertical plate is provided with a steam conveying bypass pipeline 22 A matching second arc-shaped groove. In this way, the bypass pipe support 25 supports the steam transport bypass pipe 22, and the bypass pipe support 25 is connected to the condenser bottom plate through a plurality of second connecting bolts, which is convenient for installation and disassembly. Other compositions and connection relationships are the same as in the first or second embodiment.

Embodiment 4: The present embodiment will be described with reference to FIG. 1 . The first nozzle 13 and the second nozzle 23 of the present embodiment are both dedicated deoxygenation vacuum thermal rotary nozzles. In this way, according to its structural characteristics, the rotary nozzle uses the principle of mechanical crushing, and the mist droplets are smaller, which can ensure the sufficient heat exchange between the replenishment water and the exhaust steam, and increase the temperature of the replenishment water. Other compositions and connection relationships are the same as in the first, second or third embodiment.

The manufacturer of the first nozzle 13 in this embodiment is SPRAY in the United States, and the model is DHY-50;

The manufacturer of the second nozzle 23 in this embodiment is SPRAY in the United States, and the model number is SD-5/5.0.

Embodiment 5: This embodiment will be described with reference to FIG. 1 and FIG. 4 . This embodiment includes two main water replenishment pipes 11 , which are arranged in parallel. The other ends of the pipes 11 are respectively connected with the water supply pipes of the power plant. With this arrangement, an appropriate number of main water supply pipes 11 can be selected according to the actual situation, and the two main water supply pipes 11 can be independently controlled respectively, and the operation is flexible and convenient. Other compositions and connection relationships are the same as in the first, second, third or fourth embodiment.

Embodiment 6: This embodiment is described with reference to FIGS. 4 to 6 . This embodiment includes two main steam conveying pipes 21 , two main steam conveying pipes 21 are arranged in parallel, each main steam conveying pipe 21 is closed at one end, and each The other ends of the main steam conveying pipes 21 are respectively communicated with the steam pipes of the power plant. With this arrangement, an appropriate number of main steam conveying pipes 21 can be selected according to the actual situation, and the two main steam conveying pipes 21 can be individually controlled respectively, and the operation is flexible and convenient. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

Embodiment 7: This embodiment will be described with reference to FIG. 1 to FIG. 3 . Several steam transport bypass pipes 22 in this embodiment are alternately arranged on both sides of the steam transport main pipe 21 . In this way, the purpose of increasing the laying area of the steam conveying bypass pipe 22 is to increase the spraying range of the nozzle. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.

working principle

The working principle of the present invention will be described with reference to Figures 1 to 6:

The water supply in the power plant is sprayed and atomized through the multi-channel water supply main pipeline 11 and through the first nozzle 13 at the end of the water supply bypass pipeline 12. The first nozzle 13 is a special deoxygenation vacuum thermal rotary nozzle, which can fully atomize the external water supply. , to ensure the mixing and heat exchange effect of replenishment water and exhaust steam. The principle of small flow and large quantity is adopted. Under a fixed pressure, the smaller the single nozzle with the smaller flow, the finer the droplets and the better the effect. The mechanical swirling spray forms droplets, reduces the surface tension to create a "gas-water separation" condition, and makes full use of the exhausted steam to heat the spray droplets, so that the spray droplets reach the saturation temperature as soon as possible. With the help of the vacuum negative pressure formed by the condenser and the non-condensable condensing flow channel formed inside the condenser, the segregated oxygen is collected, and the condenser is extracted by the vacuum pumping equipment, and the vacuum thermal rotary spray block (initial deoxygenation group) block) can remove 80%-90% of the gas in the water.

The bubbling steam is transported through the multi-channel steam conveying main pipeline 21, and is sprayed through the second nozzle 23 at the end of the steam conveying bypass pipeline 22, so that the supplementary water of the preliminary deoxidizing block and the condensed water of the condenser are bubbled and heated. Because in the process of vacuum thermal rotary spray block (initial deoxygenation block), after spraying, steam heating, and the convergence and extraction of the evolved oxygen in the condenser, there is still some oxygen remaining in the make-up water, and the power plant Part of the oxygen is also dissolved in the system condensate. This is due to the fact that the supplementary water contacts the water pipes in the cold zone during the falling process, forming a certain degree of supercooling, and then secondary dissolved oxygen. Therefore, it is necessary to add a vacuum thermal rotary bubbling block (deep deaeration block) in the condenser hot well, so as to eliminate the supercooling degree of the condensed water of the water make-up machine and reduce the secondary dissolved oxygen.

Claims (7)

1. a vacuum thermal deaerator for power plant condenser, is characterized in that: it comprises vacuum thermal rotary spray block and vacuum thermal rotary bubbling block, vacuum thermal rotary spray block and vacuum The thermal rotary bubbling blocks are arranged in the condenser from top to bottom in sequence; The vacuum thermal rotary spray block comprises a main water supply pipeline (11), a plurality of water supply bypass pipelines (12) and a plurality of first nozzles (13), and the water supply main pipeline (11) is arranged horizontally along the water running direction of the condenser cooling pipe Inside the upper part of the condenser, one end of the main water supply pipe (11) is closed and overlapped on the rear truss of the condenser, and the other end of the main water supply pipeline (11) is overlapped on the front truss of the condenser and extends to the condenser The outside is connected with the water supply pipeline of the power plant, and several bypass pipelines (12) are evenly distributed on one side of the main water supply pipeline (11) in the horizontal direction. One end of the pipeline (12) is communicated with the main water supply pipeline (11), and the other end of the water supply bypass pipeline (12) is provided with a first nozzle (13), and the opening direction of the first nozzle (13) is arranged downward; The vacuum thermodynamic swirl bubbling block includes a steam delivery main pipe (21), a plurality of steam delivery bypass pipes (22), a plurality of second nozzles (23), a plurality of main pipe supports (24) and a plurality of bypass pipes A support (25), the main steam conveying pipe (21) is horizontally arranged inside the lower part of the condenser along the water running direction of the condenser cooling pipe, and one end of the main steam conveying pipe (21) is closed and fixed by the main pipe support (24) On the bottom plate of the condenser, the other end of the main steam delivery pipeline (21) is fixed on the bottom plate of the condenser through the main pipeline support (24) and extends to the outside of the condenser to communicate with the steam pipeline of the power plant, and several steam delivery bypass pipelines (22) are evenly distributed on both sides of the main steam transportation pipeline (21) in the horizontal direction, the steam transportation bypass pipeline (22) is vertically connected with the main steam transportation pipeline (21), and one end of the steam transportation bypass pipeline (22) is connected with the steam transportation pipeline (22). The main pipeline (21) is connected to each other, the other end of the steam transport bypass pipeline (22) is provided with a second nozzle (23), the opening direction of the second nozzle (23) is set upward, and the steam transport bypass pipeline (22) It is fixed on the condenser bottom plate by the bypass pipe support (25). 2. A vacuum thermal deaerator for power plant condenser according to claim 1, characterized in that: each main pipe support member (24) comprises a first support seat, a first support vertical plate and a plurality of The first connecting bolt, the first support seat is horizontally fixed on the condenser bottom plate through a plurality of first connecting bolts, the lower end of the first support vertical plate is vertically fixed on the center position of the upper end surface of the first support seat, and the first support vertical The upper end of the plate is provided with a first arc-shaped groove matching with the main steam conveying pipeline (21). 3. A vacuum thermal deaerator for power plant condenser according to claim 2, characterized in that: each bypass pipe support member (25) comprises a second support seat, a second support vertical plate and multiple a second connecting bolt, the second support seat is horizontally fixed on the condenser bottom plate through a plurality of second connecting bolts, the lower end of the second support vertical plate is vertically fixed at the center position of the upper end surface of the second support seat, and the second support The upper end of the vertical plate is provided with a second arc-shaped groove matching with the steam conveying bypass pipe (22). 4 . A vacuum thermal deaerator for power plant condenser according to claim 1 , wherein the first nozzle ( 13 ) and the second nozzle ( 23 ) are both deoxygenation vacuum thermal spin nozzles. 5 . 5. A vacuum thermal deaerator for power plant condenser according to claim 3 or 4, characterized in that: it comprises two main water supply pipes (11), and the two main water supply pipes (11) are arranged in parallel One end of each main water supply pipeline (11) is closed, and the other end of each main water supply pipeline (11) is respectively connected with the water supply pipeline of the power plant. 6. A vacuum thermal deaerator for power plant condenser according to claim 5, characterized in that: it comprises two main steam conveying pipes (21), and the two main steam conveying pipes (21) are arranged in parallel One end of each main steam conveying pipe (21) is closed, and the other end of each main steam conveying pipe (21) is respectively communicated with the steam pipe of the power plant. 7 . The vacuum thermal deoxidizer for power plant condensers according to claim 7 , wherein a plurality of steam transport bypass pipes ( 22 ) are alternately arranged on both sides of the steam transport main pipe ( 21 ). 8 .

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