CN209763212U - Distributed heat supply network energy storage voltage stabilizing system - Google Patents

Abstract

The utility model relates to a distributing type heat supply network energy storage steady voltage system, the entrance side in hot water boiler (2) and in-plant heat supply network heat exchanger (3) is installed in pre-pump (4), the outlet side in hot water boiler (2) and in-plant heat supply network heat exchanger (3) is installed in heat supply network circulating pump (5), heat supply network dirt separator (8) are installed in the entrance side of pre-pump (4), the play water piping connection of heat supply network moisturizing pump (6) is on the inlet pipeline of heat supply network dirt separator (8), atmospheric pressure energy storage jar (1) have a plurality ofly, distribute in the different regions of heat supply network pipeline, the gasbag pressure of atmospheric pressure energy storage jar (1) is the same with the return water pipeline pressure that inserts the position. The utility model discloses can the rapid compensation because of the local dehydration of heat supply network causes the pressure fluctuation on the heat supply network return water pipe, successfully avoided because return water pipe goes up the pressure and crosses the accident such as the boiler emergence vaporization that causes excessively or heat supply network circulating pump entry vaporization, for the operation safety that guarantees the net source, gain better effect.

Description

Distributed heat supply network energy storage voltage stabilizing system

Technical Field

The utility model relates to a distributing type heat supply network energy storage steady voltage system.

Background

In winter in the severe cold north, the outdoor temperature can reach minus 30 ℃ at least, heat supply enterprises need to provide heating service for residents and non-residents for half a year, stable operation of heat source plant equipment and a heat supply network system becomes a prerequisite foundation for reaching the standard of heating, and pressure stability of a heat supply network primary network system becomes an important factor for stable operation of heat source plant equipment (a hot water boiler, a heat exchanger, a heat supply network circulating pump and the like). The heat supply area of a certain large heat supply enterprise in the north is 3200 ten thousand square meters (building area), the heat supply radius reaches 10 kilometers, the pipeline length of a primary network exceeds 100 kilometers, the water capacity of the primary network is about 60000 cubic meters, the heat supply parameters are water supply temperature 130 ℃, water return temperature 70 ℃, a water replenishing point of the primary network system is arranged at the inlet side of a water return pipeline dirt separator of a heat source plant, the water replenishing of a secondary network system operated by a hot water boiler MFT is taken from the primary network when the pressure is set to be 0.5Mpa and is lower than 0.3Mpa, 4 variable-frequency water replenishing pumps are arranged in the heat source plant, the total water replenishing amount is 360 cubic meters per hour, the water replenishing amount of the primary network system during the operation of the heating system is about 100 cubic meters per hour, but the situation that the system pressure is reduced instantly when the valve opening is too large when the primary network system leaks or, the situations of boiler MFT shutdown of a hot water boiler in a heat source plant, vaporization of a circulating water pump inlet of a heat supply network or water hammer of a heat supply network heat exchanger and the like are caused, and serious damage is caused to equipment. Because the conventional matched water replenishing pump cannot meet the water replenishing requirement of instantaneous overlarge water replenishing amount under the condition, the sudden pressure drop of the system is difficult to avoid. Therefore, a stable and reliable voltage stabilizing method and device are provided for a heat supply network system, and become a key research and development work which needs to be solved urgently by science and technology personnel.

Disclosure of Invention

The utility model aims at providing a distributing type heat supply network energy storage steady voltage system eliminates because the one-level network system appears great revealing or because the too big condition that can appear system's pressure in the twinkling of an eye and reduce of valve aperture when the maintenance back is to local pipe network water injection takes place, avoids the injury that from this causes heat source factory equipment, guarantees the steady operation of heat supply. The technical scheme of the utility model is that: a distributed heat supply network energy storage pressure stabilizing system comprises an air pressure energy storage tank (1), a hot water boiler (2), an in-plant heat supply network heat exchanger (3), a preposed pump (4), a heat supply network circulating pump (5), a heat supply network water replenishing pump (6), a softened water tank (7), a heat supply network dirt separator (8) and an out-plant heat supply network heat exchanger (9), wherein the preposed pump (4) is respectively arranged at the inlet sides of the hot water boiler (2) and the in-plant heat supply network heat exchanger (3), a plurality of heat supply network circulating pumps (5) are connected in parallel and then communicated with an outlet header pipe arranged at the hot water boiler (2) and the in-plant heat supply network heat exchanger (3), the outlet of the heat supply network circulating pump (5) is connected with the water inlet of the out-plant heat supply network heat exchanger (9) through a pipeline, the water outlet of the out-plant heat supply network heat exchanger (9) is connected with a heat supply network water return header pipe, the heat supply network water return header pipe is connected with the inlet, a plurality of heat supply network water supplementing pumps (6) are connected in parallel and then are connected to an inlet pipeline of a heat supply network dirt separator (8) through a water outlet pipe, a suction inlet of each heat supply network water supplementing pump (6) is connected to a softened water tank (7), and an outlet of each heat supply network dirt separator (8) is connected with a plurality of parallel front pumps (4).

The utility model discloses a theory of operation:

The utility model discloses install a plurality of atmospheric pressure energy storage jar in heat supply network pipe-line system's different regions, the pressure of gasbag is the same with return water pipeline pressure on the spot in the energy storage jar, and the regional energy storage jar gasbag pressure that sets up of heat transfer station that the relief height is the same with the heat source factory is 0.5Mpa, unanimous with the settlement pressure of the system water replenishing pump of heat source factory. The water storage volume of each energy storage tank is about 10-20 cubic meters, when the primary network system has large leakage or the system pressure is reduced instantly when the valve opening is too large after maintenance and water is injected to a local network, the nearby air pressure energy storage tanks subjected to pressure fluctuation can inject water into the tanks to the heat network system until the water is balanced with the system pressure, dozens of energy storage tanks are arranged in the whole system, the whole energy storage water volume can reach hundreds of thousands of tons, the instantaneous water supplement volume of hundreds of tons/hour can be completely coped with, the instantaneous reduction of the system pressure or the provision of a coping buffer time for a heat source plant can be eliminated when the valve opening is too large during water injection of the local network, and the damage to equipment is avoided. The air pressure energy storage tanks (1) are distributed in different areas of the heat supply network pipeline. The pressure of the air bag of the air pressure energy storage tank (1) is the same as the pressure of the water return pipeline at the access position.

The technical effects of the utility model:

In order to avoid the damage to heat source plant equipment caused by the large leakage of a primary network system or the instant large reduction of system pressure when the valve opening is too large after maintenance and water injection to a local pipe network, and ensure the stable operation of heat supply, the utility model discloses install a plurality of air pressure energy storage tanks in different areas of a heat network pipeline system, the pressure of an air bag in the energy storage tank is the same as the pressure of a local return water pipeline, when the large leakage of the primary network system occurs or the instant reduction of system pressure when the valve opening is too large after maintenance and water injection to the local pipe network occurs, the nearby air pressure energy storage tank which is subjected to pressure fluctuation can inject water into the tank to the heat network system until the water is balanced with the system pressure, because dozens of energy storage tanks are arranged in the whole system, the whole energy storage water volume can reach hundreds of thousands of tons, and the instantaneous water supplement volume of hundreds of, in addition, the distributed arrangement of the air pressure energy storage tanks on the outlet pipeline of the heat supply network heat exchanger can quickly compensate pressure fluctuation on a water return pipeline of the heat supply network caused by local water loss of the heat supply network, eliminate instantaneous reduction of system pressure or provide a coping buffer time for a heat source plant to do various coping measures when the opening of a valve is too large during water injection of the local pipe network, and avoid damage to equipment. The utility model discloses because the distribution of atmospheric pressure energy storage jar distributing type on the outlet pipe of heat supply network heat exchanger 9 outside the factory, can the rapid compensation because of the local dehydration of heat supply network cause the pressure fluctuation on the heat supply network return water pipe, successfully avoided because return water pipe goes up the pressure and crosses the accident such as boiler emergence vaporization or heat supply network circulating pump entry vaporization that leads to the fact excessively, for the operation safety of guaranteeing the net source, gained better effect.

Drawings

Fig. 1 is a schematic diagram of the system of the present invention.

Detailed Description

As shown in fig. 1, a distributed heat supply network energy storage and pressure stabilization system is composed of an air pressure energy storage tank 1, a hot water boiler 2, an in-plant heat supply network heat exchanger 3, a pre-pump 4, a heat supply network circulating pump 5, a heat supply network water replenishing pump 6, a softened water tank 7, a heat supply network dirt separator 8 and an out-plant heat supply network heat exchanger 9, wherein the pre-pump 4 is respectively installed on the inlet sides of the hot water boiler 2 and the in-plant heat supply network heat exchanger 3, the 3 heat supply network circulating pumps 5 are connected in parallel and then communicated with an outlet header pipe installed on the hot water boiler 2 and the in-plant heat supply network heat exchanger 3, the outlet of the heat supply network circulating pump 5 is connected with the water inlet of the out-plant heat supply network heat exchanger 9 through a pipeline, the water outlet of the out-plant heat supply network heat exchanger 9 is connected with a heat supply network water return header pipe. The 3 heat supply network water replenishing pumps 6 are connected in parallel and then are connected to an inlet pipeline of the heat supply network dirt separator 8 through a water outlet pipe, a suction inlet of the heat supply network water replenishing pump 6 is connected to the softened water tank 7, and an outlet of the heat supply network dirt separator 8 is connected with 3 parallel front pumps 4. The air bag pressure of the air pressure energy storage tank 1 is the same as the pressure of a water return pipeline at a connecting position, the air bag pressure of the energy storage tank arranged in the heat exchange station area with the same terrain height as a heat source plant is 0.5Mpa and is consistent with the set pressure of a system water replenishing pump of the heat source plant, and the water storage volume of each energy storage tank is 15 cubic meters. When the valve opening is too large when the water is injected into the local pipe network, the pressure fluctuation of the system is controlled within the range of 0.08Mpa when the system pressure is instantly reduced, and the pressure energy storage tanks are distributed on the outlet pipeline of the heat supply network heat exchanger 9 outside the plant, so that the pressure fluctuation on the water return pipeline of the heat supply network caused by local water loss of the heat supply network can be quickly compensated, accidents such as vaporization of a hot water boiler or vaporization of the inlet of a heat supply network circulating pump caused by too low pressure on the water return pipeline are successfully avoided, and a better effect is achieved for ensuring the operation safety of a network source.

Claims (1)

1. The utility model provides a distributed heat supply network energy storage steady voltage system which characterized by: comprises an air pressure energy storage tank (1), a hot water boiler (2), an in-plant heat network heat exchanger (3), a preposed pump (4), a heat network circulating pump (5), a heat network water replenishing pump (6), a softened water tank (7), a heat network dirt separator (8) and an out-plant heat network heat exchanger (9), wherein the preposed pump (4) is respectively arranged at the inlet sides of the hot water boiler (2) and the in-plant heat network heat exchanger (3), the heat network circulating pumps (5) are connected in parallel and then communicated with an outlet header pipe arranged at the hot water boiler (2) and the in-plant heat network heat exchanger (3), the outlet of the heat network circulating pump (5) is connected with the water inlet of the out-plant heat network heat exchanger (9) through a pipeline, the water outlet of the out-plant heat network heat exchanger (9) is connected with a heat network backwater header pipe, the heat network backwater header pipe is connected with the inlet of the heat network dirt separator (8), the air pressure energy storage, a plurality of heat supply network water supplementing pumps (6) are connected in parallel and then are connected to an inlet pipeline of a heat supply network dirt separator (8) through a water outlet pipe, a suction inlet of each heat supply network water supplementing pump (6) is connected to a softened water tank (7), and an outlet of each heat supply network dirt separator (8) is connected with a plurality of parallel front pumps (4).