CN207081229U - A medium and shallow layer heat source heating system sand layer heat preservation well - Google Patents

Abstract

The utility model discloses a heat preservation well in a sandy soil layer of a medium and shallow heat source heating system, which comprises a water supply pipe (5), the bottom of which is connected to the water supply pipe (5) and the return water pipe (6); the upper part of the return water pipe (6) Surrounded by the insulation layer (2), the outside of the insulation layer (2) is surrounded by the soil layer (1); the lower part of the return pipe (6) is surrounded and closed by the backfill (4), and the outside of the backfill (4) Surrounded by the rock layer (3); the top of the water supply pipe (5) communicates with the water inlet pipe (9), the water inlet pipe (9) has a water pump and communicates with the first heat pump host (7), and the first The heat pump main unit (7) communicates with the second heat pump main unit (8), and the second heat pump main unit (8) communicates with the top end of the return water pipe (6) through the water outlet pipe (10). The utility model improves the comprehensive efficiency of the deep geothermal well, improves the overall temperature of the geothermal well, and further increases the average temperature of the geothermal well.

Description

A kind of middle-shallow layer heat supply system sandy soil layer is incubated well

Technical field

A kind of sandy soil layer insulation well is the utility model is related to, especially a kind of middle-shallow layer heat supply system sandy soil layer insulation Well, belong to field of new energy technologies.

Background technology

The Cheng Jingzhong of middle-shallow layer ring heat supply, is exchanged heat mainly by rock part, and the temperature of the sandy soil layer on top is relatively low, such as Fruit does not take Insulation, can reduce the temperature of heat-exchanging water, reduces individual well heat exchange efficiency, therefore, middle-shallow layer heat supply system Sandy soil layer insulation well is urgently studied.

The content of the invention

To solve existing problem above, the utility model discloses a kind of insulation of middle-shallow layer heat supply system sandy soil layer Well, including feed pipe, the feed pipe connect with backwater bottom of the tube；The return pipe top insulation layer surrounds, the insulation Layer it is outside by soil layer surround ring around；The return pipe bottom expects to surround by backfill to be closed, and the backfill material is outside by lithosphere bag Seal and close；The feed pipe top connects with water inlet pipe, and the water inlet pipe connects with water pump and with the first heat pump main frame, described First heat pump main frame is connected with the second heat pump main frame, and second heat pump main frame is connected by outlet pipe and the return pipe top It is logical.

Preferably, the backfill material is concrete.

Preferably, the heat-insulation layer is foam cement or mineral wool.

Beneficial effect：

(1) during the utility model solves the utilization of deep-well geothermal well, winter stratum upper temp is relatively low, or even 5 Below DEG C, counteractive problem is played to underground heat backwater；

(2) overall efficiency of deep-well geothermal well is improved, the heat of underground sufficiently can carry out energy by heat pump main frame and carry Rise and utilize；

(3) bulk temperature of the geothermal well improved, upper strata low temperature part can not consider, and then improve the flat of geothermal well Equal temperature.

Brief description of the drawings

Fig. 1 is the utility model structure chart.

Wherein, 1, soil layer, 2, heat-insulation layer, 3, lithosphere, 4, backfill material, 5, feed pipe, 6, return pipe, the 7, first heat pump master Machine, the 8, second heat pump main frame, 9, water inlet pipe, 10, outlet pipe.

Embodiment

With reference to accompanying drawing, the utility model is described in further details.

A kind of middle-shallow layer heat supply system sandy soil layer is incubated well, including feed pipe 5, feed pipe 5 and return pipe 6 bottom Portion connects；The top insulation layer 2 of return pipe 6 surrounds, outside the heat-insulation layer 2 by the surround ring of soil layer 1 around；The return pipe 6 bottoms are surrounded by backfill material 4 and closed, and closing is surrounded by lithosphere 3 outside the backfill material 4；The top of feed pipe 5 and water inlet Pipe 9 connects, and the water inlet pipe 9 is with water pump and is connected with the first heat pump main frame 7, the heat pump of the first heat pump main frame 7 and second Main frame 8 is connected, and second heat pump main frame 8 is connected by outlet pipe 10 with the top of return pipe 6.The backfill material 4 is mixed Solidifying soil, the heat-insulation layer 2 is foam cement or mineral wool.

As illustrated, the feed pipe 5 supplies water to whole system, the water of confession is the most hot water in geothermal well bosom, described Hot water in feed pipe 5 enters the first heat pump master in the presence of the water pump of the water inlet pipe 9, by the feed pipe 5 Machine 7, after being extracted heat, temperature reduces, and into second heat pump main frame 8, after being extracted heat again, temperature is further Reduce, entered by the outlet pipe 10 in the return pipe 6 and heated, wherein in the soil layer 1, because the soil layer Water temperature is relatively low in 1, so need not exchange heat, if heat exchange may further reduce GEOTHERMAL WATER return water temperature, so by described Heat-insulation layer 2 is incubated；Then heat supply backwater enters in the deeper lithosphere 3, and GEOTHERMAL WATER is higher by thermal conductivity factor The backfill material 4 and the lithosphere 3 are fully exchanged heat, and according to geothermic gradient, underground heat backwater is more down warmmer, reaches bottom Afterwards, underground heat return water temperature reaches highest, is then quickly drawn out and by described in the water inlet pipe 9 entrance by the feed pipe 5 First heat pump main frame 7 and second heat pump main frame 8 carry out heat supply, so circulation.

Above-mentioned embodiment is only intended to clearly illustrate the utility model example, and not to embodiment party The restriction of formula.For those of ordinary skill in the field, other differences can also be made on the basis of the above description The change or variation of form, there is no necessity and possibility to exhaust all the enbodiments, and thus amplify out aobvious and The change or variation being clear to are still in the scope of protection of the utility model.

Claims (3)

1. A kind of medium and shallow heat source heating system sandy soil insulation well, is characterized in that, comprises water supply pipe (5), and described water supply pipe (5) is communicated with the bottom of water return pipe (6); Described water return pipe (6) The upper part is surrounded by the insulation layer (2), and the outside of the insulation layer (2) is surrounded by the soil layer (1); the lower part of the return pipe (6) is surrounded and closed by the backfill (4), and the backfill (4) The outside is surrounded and closed by the rock layer (3); the top of the water supply pipe (5) communicates with the water inlet pipe (9), the water inlet pipe (9) has a water pump and communicates with the first heat pump host (7), the first A heat pump main unit (7) communicates with a second heat pump main unit (8), and the second heat pump main unit (8) communicates with the top of the return water pipe (6) through a water outlet pipe (10). 2. The insulation well in a sandy soil layer of a medium-shallow heat source heating system according to claim 1, characterized in that the backfill (4) is concrete. 3. The heat preservation well in a sandy soil layer of a medium and shallow heat source heating system according to claim 1, wherein the heat preservation layer (2) is foamed cement or glass wool.