CN203053088U

CN203053088U - Waste heat utilization heat pump system

Info

Publication number: CN203053088U
Application number: CN 201220699938
Authority: CN
Inventors: 苏存堂; 郭建基; 李福仓
Original assignee: Beijing Eco Greenland Ground Source Technological Co Ltd
Current assignee: Beijing Eco Greenland Ground Source Technological Co Ltd
Priority date: 2012-12-17
Filing date: 2012-12-17
Publication date: 2013-07-10
Anticipated expiration: 2022-12-17

Abstract

The utility model discloses a waste heat utilization heat pump system. Heat pumps heat low-temperature hot water through the mode that two heat pumps are connected in series to form a two-stage heat pump set. The specific connection mode is that evaporators of each heat pump are connected in parallel and commonly connected with a low-temperature heat source at the same temperature, condensers of each heat pump are connected in series, a low-temperature heat supply backwater pipeline is connected onto a condenser of a first heat pump, the condenser of the first heat pump is connected onto a condenser of a second heat pump, and the condenser of the second heat pump is connected onto a heat supply pipeline. With the structure, compared with a single-stage heat pump system, the heat pump system can efficiently obtain hot water of the high temperature difference and high temperature to provide for other purposes, the requirement that cooling water is cooled is met, and the aim of reducing energy consumption is achieved.

Description

The UTILIZATION OF VESIDUAL HEAT IN heat pump

Technical field

The utility model relates to a kind of heat pump, relates in particular to the heat pump of the waste heat in the low-temperature cooling water that can utilize power plant steam turbine condenser and miscellaneous equipment generation.

Background technology

At present, service message factory cooling water heat utilizes system to be the single-stage heat pump, and the hot water temperature that this single-stage heat pump is produced is lower, generally between 45～60 ℃; The temperature difference of its import and export of hot water that next single-stage heat pump is produced is smaller, generally is no more than 20 ℃; The 3rd, the efficient of single-stage heat pump is lower.

The utility model content

In order to overcome the deficiency of single-stage heat pump, the utility model provides a kind of UTILIZATION OF VESIDUAL HEAT IN heat pump that adopts multi-stage heat pump, can produce the hot water of the higher temperature difference, higher temperature under the situation of greater efficiency.

For achieving the above object, the technical solution adopted in the utility model is as follows:

The UTILIZATION OF VESIDUAL HEAT IN heat pump adopts two heat pumps to be connected into two-stage heat pump group to low-temperature water heating and heats.

Pass through said structure, heat pump will come out heat extraction from cooling water, the hot water that need heat passes through the condenser of two heat pumps step by step, thereby heated step by step and be up to about 90～95 ℃, because the heat of heat hot water is to extract from the cooling water of power plant, has solved the UTILIZATION OF VESIDUAL HEAT IN problem of power plant cooling water; Because hot water heats step by step by heat pump, so need its inlet temperature of hot water of heating can be lower and outlet temperature after the heating can be than higher; Owing to adopt the two-stage heating, so the outlet temperature of heat pump improves gradually, the efficient of previous stage heat pump has guaranteed the high efficiency of whole system so always than the efficient height of back one-level heat pump simultaneously.

Concrete, the annexation of two heat pumps is: the evaporimeter parallel connection of each heat pump is connected to the low-temperature heat source of uniform temp jointly; The condenser series connection of every heat pump, the low-temperature heat supply water return pipeline is connected to the condenser of first heat pump, and the condenser of first heat pump is connected to the condenser of second heat pump, and the condenser of second heat pump is connected to heat supply pipeline.

By this syndeton, the Inlet and outlet water temperature difference of every heat pump condenser diminishes, and it is big that the temperature difference of whole system circulation water for heating becomes, and makes to realize the big temperature difference, low discharge operation through the power plant cooling water of heat pump processing, reduces equipment investment and operating cost.

Description of drawings

Fig. 1 is the general structure schematic diagram of the utility model heat pump;

Fig. 2 is the connected mode schematic diagram of the utility model heat pump.

The specific embodiment

With reference to figure 1, the application of UTILIZATION OF VESIDUAL HEAT IN heat pump of the present utility model in boiler of power plant, heat pump (2,3), hot water user 4, boiler replenishing water pump 5, boiler 6, steam turbine 7, condenser 8, cooling water pump 9, cooling tower 10 by supply-water pump 1, series connection are formed, supply-water pump will suck and pump from hot water user's low temperature backwater, and the low temperature backwater that needs heating is sent to hot water user place after being heated by

heat pump

2,3 condenser step by step again.Boiler replenishing water pump pressurization meanwhile pumps into boiler with the condensate water in the condenser, water becomes the steam of HTHP through heating evaporation in boiler, enter steam turbine, the pushing turbine rotation drives generator and produces electric power, then steam becomes exhaust steam and discharges from steam turbine tail end low pressure (LP) cylinder after steam turbine acting, the gas of discharging from steam turbine enters the condenser water cooling that is cooled and becomes water again and emit a large amount of heats, finishes a circulation thereby pumped into boiler by the boiler replenishing water pump again subsequently.

Meanwhile, enter the cooling water of condenser and the gas of steam turbine discharge and carry out heat exchange, gas is emitted a large amount of heat heating cooling waters in condensing into the process of water, the water pump that is cooled after cooling water is heated pumps, a part is to

heat pump

2,3 evaporimeter, the heat that in the evaporimeter of heat pump it is carried sends hot water to by heat pump cycle, thereby realize the purpose of recycling, another part is to the cooling tower heat release, converge again after the heat release of two parts cooling water is finished and enter condenser and absorb heat, thereby realize a circulation.

With reference to figure 2, shown water complete flow process in heat pump, the evaporator end of heat pump 2 is extracted the heat among the low-temperature heat source water A1, the heat supply backwater A2 device that is condensed is heated to be the condenser that hot water A3 enters heat pump 3, the evaporator end of heat pump 3 is extracted the heat among the low-temperature heat source water A4, promote the hot water temperature and become final hot water A5, enter heat supply pipeline.

Claims

1. the UTILIZATION OF VESIDUAL HEAT IN heat pump is characterized in that adopting two heat pumps to be connected into two-stage heat pump group to low-temperature water heating heats.

2. UTILIZATION OF VESIDUAL HEAT IN heat pump according to claim 1 is characterized in that the evaporimeter parallel connection of each heat pump, is connected to the low-temperature heat source of uniform temp jointly; The condenser series connection of every heat pump, the low-temperature heat supply water return pipeline is connected to the condenser of first heat pump, and the condenser of first heat pump is connected to the condenser of second heat pump, and the condenser of second heat pump is connected to heat supply pipeline.