CN210688159U - A local distributed energy system - Google Patents

Abstract

The utility model discloses a local distributed energy system, comprising a waste heat boiler, wherein a high temperature heat exchanger and a low temperature heat exchanger are arranged in the waste heat boiler, and flue gas passes through the high temperature heat exchanger and the low temperature heat exchanger in sequence, and the high temperature heat exchanger The steam outlet end of the heat exchanger is connected with the industrial equipment that needs steam through the steam supply pipe, the condensate water outlet of the industrial equipment is connected with the water inlet of the high temperature heat exchanger through the condensate water pipe, and the water outlet of the low temperature heat exchanger is connected with the water supply pipe. It is connected with the heating equipment, and the water outlet of the heating equipment is connected with the water inlet of the low temperature heat exchanger through the return pipe. The hot water is used for different purposes, which avoids heat loss, improves the energy-saving, economical and environmental benefits of the local distributed energy system, as well as flue gas utilization and heat exchange efficiency.

Description

A local distributed energy system

technical field

The utility model relates to the field of energy, in particular to a local distributed energy system.

Background technique

Distributed energy, as a cutting-edge technology for substantial energy saving, is one of the four cutting-edge technologies in the energy field of my country's medium and long-term scientific and technological development plan. It has the advantages of small size, high efficiency, cleanliness, and closeness to users. The energy system has important practical significance and far-reaching strategic significance. At present, distributed energy mainly uses gas turbine or gas internal combustion engine as the prime mover. Distributed energy with gas internal combustion engine as the prime mover generally provides cooling for hospitals, hotels, commercial complexes, office buildings, etc. energy such as thermoelectricity.

In the existing distributed energy system, heat exchangers are generally installed in waste heat boilers, and the high-temperature flue gas of the distributed energy system is used to produce steam, which is supplied to the steam-using equipment in the industrial park. When heating is required, it is often Another heat exchanger is set up in the industrial park to condense the steam into hot water, that is, to cool the steam, heat the water into steam in the waste heat boiler, and then cool the steam and condense it into hot water. The process of cooling causes waste of energy, and the energy, economy and environment are all low. How to improve the 3E benefits of the local distributed energy system has become an urgent problem to be solved.

SUMMARY OF THE INVENTION

In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a local distributed energy system with significantly improved energy saving, economy and environmental protection.

The purpose of this utility model is achieved in this way:

A local distributed energy system includes a waste heat boiler, wherein a high temperature heat exchanger and a low temperature heat exchanger are arranged in the waste heat boiler, the flue gas passes through the high temperature heat exchanger and the low temperature heat exchanger in sequence, and the output of the high temperature heat exchanger is The steam end is connected with the industrial equipment that needs steam through the steam supply pipeline, the condensed water outlet of the industrial equipment is connected with the water inlet of the high temperature heat exchanger through the condensed water pipeline, and the water outlet of the low temperature heat exchanger is connected with the heating equipment through the water supply pipeline. The water outlet of the heating equipment is connected with the water inlet of the low temperature heat exchanger through the return water pipe.

The condensed water pipeline is provided with a preheater, a softened water tank and a first water pump, and the preheater, the softened water tank and the first water pump are arranged in sequence between the condensed water outlet of the industrial equipment and the water inlet of the high temperature heat exchanger.

The preheater includes a casing and a spiral tube located in the casing. The bottom and the top of the casing are respectively provided with a first air inlet for entering the flue gas and a first air outlet for discharging the flue gas. There is a first water inlet for water to enter and a first water outlet for water to discharge, the first air inlet is connected with the smoke outlet of the low temperature heat exchanger, and the first water inlet and the first water outlet are connected with the condensed water pipeline .

A second water pump is arranged on the return water pipeline, and an expansion tank is arranged at the water inlet end of the second water pump.

The inlet end of the softened water tank is provided with a supply water pipe.

The beneficial effects of the utility model are as follows: the low-temperature heat exchanger and the high-temperature heat exchanger of the utility model are arranged to produce steam and hot water respectively, so that the steam and hot water can be used for different purposes respectively, avoiding the loss of heat, and improving the The benefits of energy saving, economy and environmental protection of the local distributed energy system, the utilization rate of flue gas and heat exchange efficiency, and the setting of the preheater further improve the utilization rate of flue gas and improve the efficiency of condensed water. temperature.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the preheater of the utility model;

In the figure: waste heat boiler 1, high temperature heat exchanger 2, low temperature heat exchanger 3, steam supply pipeline 4, condensate water pipeline 5, preheater 6, first water pump 7, softened water tank 8, water supply pipeline 9, return water pipeline 10. The second water pump 11 , the supply water pipe 12 , the expansion tank 13 , the casing 14 , the spiral pipe 15 , the first water inlet 16 , the first water outlet 17 , the first air inlet 18 , and the first air inlet 19 .

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a local distributed energy system includes a waste heat boiler 1, and the waste heat boiler 1 is provided with a high temperature heat exchanger 2 and a low temperature heat exchanger 3, and the flue gas passes through the high temperature heat exchange in sequence. Heat exchanger 2 and low temperature heat exchanger 3, the steam outlet end of high temperature heat exchanger 2 is communicated with the industrial equipment that needs steam through steam supply pipeline 4, and the condensed water outlet of industrial equipment is connected with the high temperature heat exchanger 2 through condensed water pipeline 5. The water inlet is connected, and the condensate water pipeline 5 is provided with a preheater 6, a softened water tank 8 and a first water pump 9. The preheater 6, the softened water tank 8 and the first water pump 9 are exchanged at the condensate water outlet of the industrial equipment to the high temperature. The water inlets of the heaters 2 are arranged in sequence. The preheater 6 heats the condensed water and makes full use of the heat of the flue gas. The first water pump 9 provides power for the condensed water to enter the high temperature heat exchanger 2 and the outlet of the low temperature heat exchanger 3 The water outlet is connected with the heating equipment through the water supply pipe 9, and the water outlet of the heating equipment is connected with the water inlet of the low temperature heat exchanger 3 through the water return pipe 10. The water inlet end is provided with an expansion water tank 13, the second water pump 11 provides power for the return water to enter the low temperature heat exchanger 3, the high temperature heat exchanger 2 is used to produce steam and supply it to industrial equipment, and the inlet end of the softened water tank 8 is provided with a replenishment The water pipe 12 and the supplementary water pipe 12 are convenient for replenishing the water volume of the high temperature heat exchanger 2 in time. The supplementary water pipe 12 can be provided with a preheater, which uses the heat of the waste heat flue gas to heat the supplementary water. The structure of the preheater on the supplementary water pipe 12 can be the same as that of the preheater 6 Similarly, the low temperature heat exchanger 3 is used to produce hot water for heating, and the high temperature heat exchanger 2 and the low temperature heat exchanger 3 are arranged in the waste heat boiler 1 to improve the utilization rate of flue gas and heat exchange efficiency.

The steam outlet end of the high temperature heat exchanger 2 is connected to the industrial steam equipment through the steam supply pipeline 4. The design temperature of the steam is determined according to the type of the steam consuming equipment. The heat in the steam is transferred to the steam consuming equipment and condenses into condensed water. The water pipe 5 is transported back to the water inlet end of the high temperature heat exchanger 2; the hot water produced by the low temperature heat exchanger 3 is transported to the heating equipment through the water supply pipe 9. The design temperature of the hot water can be 65℃-95℃, and the heating equipment is radiant Heat exchange plates, radiators, etc., the hot water after heat dissipation and cooling in the heating equipment is transported back to the water inlet end of the low temperature heat exchanger 3 through the return water pipeline 10 . The arrangement of the high temperature heat exchanger 2 and the low temperature heat exchanger 3 enables steam and hot water to be used for different purposes respectively, avoiding heat loss and improving the 3E benefit of the local distributed energy system. And because distributed energy stations are generally built near industrial parks, supplying hot water and steam to industrial parks will not cause waste of pipes.

The preheater 6 includes a casing 14 and a helical pipe 15 located in the casing 14. The bottom and top of the casing 14 are respectively provided with a first air inlet 18 for entering the flue gas and a first air inlet for discharging the flue gas. The air outlet 19 and the spiral pipe 15 are respectively provided with a first water inlet 16 for entering water and a first water outlet 17 for discharging water. The first air inlet 16 is connected to the smoke outlet of the low temperature heat exchanger 3, A water inlet 16 and a first water outlet 17 are connected to the condensate pipe 5, the condensate in the spiral pipe 15 flows from top to bottom, and the smoke outside the spiral pipe 15 flows from bottom to top. The waste heat flue gas is used to preheat the condensed water, which further improves the utilization rate of the flue gas and increases the temperature of the condensed water; the condensed water in the spiral tube 15 flows from top to bottom, and the flue gas outside the spiral tube 15 flows from the bottom to the top Flow, using the flow law of liquid and gas, reduces the consumption of power equipment.

The low-temperature heat exchanger and the high-temperature heat exchanger of the utility model are arranged to produce steam and hot water respectively, so that the steam and hot water can be used for different purposes respectively, so as to avoid the loss of heat and improve the efficiency of the local distributed energy system. The benefits of energy saving, economy and environmental protection, as well as the utilization rate of flue gas and heat exchange efficiency, the setting of the preheater further improves the utilization rate of flue gas and the temperature of condensed water.

Claims (5)

1. A local area distributed energy system comprises a waste heat boiler, and is characterized in that: be equipped with high temperature heat exchanger and low temperature heat exchanger among the exhaust-heat boiler, the flue gas passes through high temperature heat exchanger and low temperature heat exchanger in proper order, and the play vapour end of high temperature heat exchanger feeds through with the industrial equipment that needs to use steam through supplying the vapour pipeline, and the condensate outlet of industrial equipment passes through the condensate pipe and is connected with the water inlet of high temperature heat exchanger, and low temperature heat exchanger's delivery port passes through water supply pipe and is connected with heating equipment, and heating equipment's delivery port passes through the return water pipeline and is connected with low temperature heat exchanger.

2. The local distributed energy system of claim 1, wherein: the condensate pipeline is provided with a preheater, a softening water tank and a first water pump, and the preheater, the softening water tank and the first water pump are sequentially arranged between a condensate outlet of the industrial equipment and a water inlet of the high-temperature heat exchanger.

3. The local distributed energy system of claim 2, wherein: the preheater comprises a shell and a spiral pipe positioned in the shell, wherein the bottom and the top of the shell are respectively provided with a first air inlet for enabling flue gas to enter and a first gas outlet for enabling the flue gas to be discharged, the spiral pipe is respectively provided with a first water inlet for enabling water to enter and a first water outlet for enabling the water to be discharged, the first air inlet is connected with a smoke outlet of the low-temperature heat exchanger, and the first water inlet and the first water outlet are connected with a condensed water pipeline.

4. The local distributed energy system of claim 1, wherein: and a second water pump is arranged on the water return pipeline, and an expansion water tank is arranged at the water inlet end of the second water pump.

5. The local distributed energy system of claim 2, wherein: and a supplementary water pipe is arranged at the inlet end of the softening water tank.

Images