CN-224215923-U - Cooling water heat recovery system of power plant

Abstract

The utility model relates to a cooling water heat recovery system of a power plant, which is characterized in that cooling water of the power plant enters heat exchange equipment through a first water inlet pipe, heat in the cooling water is transferred to recovery circulating water by the heat exchange equipment, the recovery circulating water is sent into a heat pump unit through a second water inlet pipe, so that the heat of the cooling water in the power plant is recovered, the cooling water after heat exchange returns into the power plant through a first water outlet pipe, and the recovery circulating water after heat exchange returns into the heat exchange equipment through a second water outlet pipe, and impurities in the cooling water are filtered through a connecting pipe and a filtering mechanism in the process that the cooling water enters the heat exchange equipment through the first water inlet pipe, so that the impurities are prevented from entering the heat exchange equipment, and the heat exchange equipment is prevented from being blocked, so that the impurities in the cooling water of the power plant can be filtered conveniently.

Inventors

• WANG ZHIPENG
• CHEN KUNPENG
• LIN XIANGKUN
• WANG JUN

Assignees

• 泰安河海热力有限公司

Dates

Publication Date

20260508

Application Date

20250529

Claims (6)

1. 1. The cooling water heat recovery system of the power plant is characterized by comprising power plant equipment (1), heat exchange equipment and a heat pump unit (7), wherein the power plant equipment is communicated with the heat exchange equipment through a first water inlet pipe and a first water outlet pipe (3), the heat exchange equipment is communicated with the heat pump unit through a second water inlet pipe (10) and a second water outlet pipe (5), and the first water inlet pipe comprises two connecting pipes (2) which are respectively communicated with the output end of the power plant equipment and the heat exchange equipment, and a filtering mechanism which is arranged between the two connecting pipes and is communicated with the connecting pipes.
2. 2. The cooling water heat recovery system of a power plant according to claim 1, wherein the filtering mechanism comprises a circular tube (13) arranged at one end of a connecting tube, a first connecting groove (18) is formed in one end face of the circular tube, a first rubber pad (16) is fixedly connected to the bottom of the first connecting groove, one end of the connecting tube is located in the first connecting groove and is abutted to the first rubber pad, a rotary drum (15) is coaxially arranged on the other end face of the circular tube, a first cylinder (23) located in the rotary drum is coaxially fixedly connected to the other end face of the circular tube, a boss (24) is fixedly connected to the outer side wall of the first cylinder, a second rubber pad (25) attached to the boss and the outer side wall of the first cylinder is arranged between the rotary drum and the first cylinder, a second cylinder (14) coaxial with the circular tube is arranged between the rotary drum and the second rubber pad, a first limit groove (28) matched with the second rubber pad is formed in the inner side wall of the second cylinder, a thread groove (21) is formed in the inner side wall of the second cylinder, a boss (22) is fixedly connected to the outer side wall of the second cylinder, a boss (27) is located in the second side wall of the second cylinder, and the second limit groove is far away from the first connecting groove (27), and the first connecting tube is fixedly connected to the other end of the first connecting tube, and the second connecting groove is fixedly connected to the other end of the first connecting tube.
3. 3. The cooling water heat recovery system of a power plant according to claim 2, wherein a limiting rod (19) is fixedly connected to the outer side wall of one connecting pipe, and a second limiting groove (17) matched with the limiting rod is formed in the inner side wall of the first connecting groove.
4. 4. The cooling water heat recovery system according to claim 2, wherein the protrusions are provided on the outer side wall of the first cylinder, and the protrusions are equally distributed along the circumferential direction of the first cylinder.
5. 5. The cooling water heat recovery system of a power plant according to claim 4, wherein the second water inlet pipe and the second water outlet pipe are connected with the heat pump unit through a first three-way valve (11) and a second three-way valve (6), a third water inlet pipe (12) is arranged on the first three-way valve, a third water outlet pipe (8) is arranged on the second three-way valve, and one end, far away from the first three-way valve, of the third water inlet pipe and one end, far away from the second three-way valve, of the third water outlet pipe are both communicated with the cold water tower (9).
6. 6. The plant cooling water heat recovery system according to claim 4, wherein the heat exchange device is provided as a plate heat exchanger (4).

Description

Cooling water heat recovery system of power plant Technical Field The utility model relates to the technical field of mechanical design, in particular to a cooling water heat recovery system of a power plant. Background In the thermal power field, a large amount of low-temperature waste heat can be generated in the operation process of equipment such as a power plant steam turbine, and the traditional treatment mode is that the equipment is directly discharged into the environment through a cooling tower, so that energy waste is caused. Along with the national 'double carbon' strategy, the waste heat recycling technology is widely applied, wherein a heat pump unit and heat exchange equipment combined system becomes a mainstream technical scheme. The system transfers heat in the cooling water of the power plant to the recovered circulating water through the heat exchange equipment, and the heat pump unit is used for supplying heat or generating power after the grade of the heat energy is improved, so that the cascade utilization of energy sources is realized. In the practical application scene of the waste heat recovery system, various impurities such as pipeline corrosion products, microorganism metabolites and the like can be inevitably wrapped in the circulating cooling water of the power plant in the continuous operation stage. When the impurities enter the heat exchange equipment along with water flow, deposition phenomenon is very easy to occur in the heat exchange tube bundle, so that dirt heat resistance is formed, and the normal operation efficiency of the waste heat recovery device is obviously influenced. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides the power plant cooling water heat recovery system which can filter impurities in cooling water and avoid the impurities from entering heat exchange equipment to cause the blockage of the heat exchange equipment. The utility model provides a cooling water heat recovery system of a power plant, which comprises power plant equipment, heat exchange equipment and a heat pump unit, wherein the power plant equipment is communicated with the heat exchange equipment through a first water inlet pipe and a first water outlet pipe, the heat exchange equipment is communicated with the heat pump unit through a second water inlet pipe and a second water outlet pipe, and the first water inlet pipe comprises two connecting pipes respectively communicated with the output end of the power plant equipment and the heat exchange equipment and a filtering mechanism arranged between the two connecting pipes and communicated with the connecting pipes. In the use process of the device, the cooling water of the power plant equipment enters the heat exchange equipment through the first water inlet pipe, the heat exchange equipment transmits heat in the cooling water to the recovery circulating water, the recovery circulating water is sent into the heat pump unit through the second water inlet pipe, so that the heat of the cooling water in the power plant equipment is recovered, the cooling water after heat exchange returns into the power plant equipment through the first water outlet pipe, the recovery circulating water after heat exchange returns into the heat exchange equipment through the second water outlet pipe, and impurities in the cooling water are filtered through the connecting pipe and the filtering mechanism in the process of entering the heat exchange equipment through the first water inlet pipe, so that the impurities in the cooling water are prevented from entering the heat exchange equipment and blocking the heat exchange equipment. Preferably, the filtering mechanism comprises a circular tube arranged at one end of one connecting tube, a first connecting groove is formed in one end face of the circular tube, a first rubber pad is fixedly connected to the bottom of the first connecting groove, one connecting tube is positioned in the first connecting groove and is abutted to the first rubber pad, a rotary drum is coaxially arranged on the other end face of the circular tube, a first cylinder positioned in the rotary drum is coaxially fixedly connected to the other end face of the circular tube, a bulge is fixedly connected to the outer side wall of the first cylinder, a second rubber pad attached to the bulge and the outer side wall of the first cylinder is arranged between the rotary drum and the first cylinder, a second cylinder coaxial with the circular tube is arranged between the rotary drum and the second rubber pad, a first limiting groove matched with the second rubber pad is formed in the inner side wall of the second cylinder, a threaded groove is formed in the inner side wall of the second cylinder, a second connecting groove is formed in the outer side wall of the second cylinder, a second connecting groove is formed in the other end face of the second cylinder, a third connecting groove is fixedly con