CN201277641Y

CN201277641Y - Enclosed circulation phase-changing heat supply apparatus for industrial boiler

Info

Publication number: CN201277641Y
Application number: CNU2008201343687U
Authority: CN
Inventors: 刘绍允
Original assignee: 刘绍允
Current assignee: Shaanxi Qiaoshangqiao Boiler Container Manufacture Co., Ltd.
Priority date: 2008-02-02
Filing date: 2008-10-10
Publication date: 2009-07-22
Anticipated expiration: 2018-10-10

Abstract

The utility model relates to a closed circulating phase-change heat supply device for an industrial boiler. A gas outlet opening of the boiler is communicated with a gas inlet opening of a gas-distributing cylinder through a steam main pipe, the gas outlet opening of the gas-distributing cylinder is communicated with a heating device and a steam inlet opening of a secondary steam boiler via a steam main pipe and a steam branch pipe, a stand-by pipeline is arranged at the backward position of the steam main pipe, a branch pipeline leading to a water storage tank is arranged on a steam main pipe pipeline, water filling tanks are connected at the lower parts of the heating device and the secondary steam boiler, each water filling tank is connected with a two-phase flow main pipe via an overflow pipe, the liquid outlet opening of the two-phase flow main pipe leads to the liquid inlet opening of a low-level liquid collecting tank, the liquid outlet opening of the low-level liquid collecting tank leads to the water storage tank through a high-temperature pump, and the water outlet opening of the water storage tank leads to the water inlet opening of the boiler through the high-temperature pump. The device can effectively prevent the air outside from infiltrating during the running process and prevent the equipment of the device from being eroded by the gas, and since the phase-change heat supply circulation is performed to the steam generated by the boiler in the closed system, the high-temperature condensed water is fully recycled, and the utilization ratio of the heat energy of the device is improved.

Description

Industrial Boiler closed circulating phase-change heating plant

Technical field

The utility model belongs to the Heat Supply Engineering equipment technical field, relates to a kind of Industrial Boiler closed circulating phase-change heating plant.

Background technology

Present known Industrial Boiler phase transformation heating plant mostly is open installation, become steam is finished heat exchange in device after to be condensed water, and the indirect steam after most of condensed water and the step-down all can not be installed recycling effectively.Though this area is also developed the heating plant that some are equipped with condensate water recovery device in succession in recent years, but because it can not be fully and isolated from atmosphere, also have oxygen corrosion in the device, condensed water can not all be reclaimed, and therefore causes the waste of device heat energy and being corroded of equipment.In addition; the hot equipment of usefulness in existing most of device also all must be adorned drain valve; because the drain valve failure phenomenon is commonplace in the device running, influenced the normal operation of equipment, install in service; because the keying of equipment; temperature and pressure decline produces negative pressure when shutting down, gap intrusion device internal corrosion system and equipment that extraneous air is existed by pipeline, pump raft, also influence heat transfer; therefore, existing device also must dispose water treatment facilities such as oxygen-eliminating device and Na-ion exchanger.

The utility model content

The purpose of this utility model is the problem that prior art exists is solved, and a kind of reasonable in design, dependable performance is provided, the heat content of condensate water in the heating system all can be reclaimed and avoid outside air to enter and cause system equipment by the Industrial Boiler closed circulating phase-change heating plant of corrosion such as oxygen and carbon dioxide in the heating system.

The technical solution that adopts is for achieving the above object: the Industrial Boiler closed circulating phase-change heating plant that is provided contains boiler, water tank, gas-distributing cylinder, high-temperature pump, a plurality ofly use hot equipment, the low level liquid collecting jar of water level controller is housed, the indirect steam boiler, main steam header, steam is done, many steam branch pipes and connecting line, in the device syndeton, the boiler gas transferring port is communicated with by main steam header and gas-distributing cylinder air intake, the gas-distributing cylinder venthole is communicated with the steam main air intake, steam main is communicated with each steam branch pipe, and each steam branch pipe venthole is communicated with the air intake of hot equipment of corresponding usefulness and indirect steam boiler respectively; The top air intake of low level liquid collecting jar is communicated with by an arm low-voltage tube and steam main; In the downstream of steam main the standby pipeline is housed; On the pipeline of main steam header, be arranged with a cross over pipe that is connected to the water tank air space; All be connected with the water-filling jar with hot equipment and indirect steam boiler bottom, each water-filling jar is connected with the two phase flow main by overflow pipe separately, the liquid outlet of two phase flow main passes to the inlet of low level liquid collecting jar, the liquid outlet of low level liquid collecting jar bottom is connected with the inlet of water tank by high-temperature pump, and the delivery port of water tank bottom passes to the water inlet of boiler by high-temperature pump.

In device real work described in the utility model, the steam of being supplied with by boiler is after steam main is transported to hot equipment, become high-temperature condensation water and flow automatically to low level liquid collecting jar by heat exchange by difference in height, deliver to the water tank of boiler again by high-temperature pump, and then deliver to boiler by high-temperature pump again and repeat heating, working medium (water) is carried out the phase transformation circulation with the form of vapour-liquid-vapour in the device of sealing like this, for each heating equipment is supplied with heat.In the utility model apparatus structure, provided upstream at steam main has the standby pipeline, closes when stopping heat supply when main, and the standby pipeline will charge into down-stream system through post-decompression low-pressure steam, make device be kept above atmospheric barotropic state, stop outside air to infiltrate in the device; At the part that is communicated with main or separate unit during with hot equipment out of use, when descending the negative pressure that presents along with temperature and pressure with hot equipment, back pressure in the low level liquid collecting jar will with the effect of playing valve in the hydraulic pressure in the water-filling jar that is connected with hot equipment is gone into headroom with hot equipment, also stop in the outside air infiltration equipment, effectively prevented of the corrosion of the oxygen and carbon dioxide material of various approach by above-mentioned measure to equipment, get rid of incondensable gas in the device, improved the heat exchange performance of steam.In addition, linked by cross over pipe between the Boiler Steam person in charge and the water tank, make boiler and water tank pressure keep balance, the water of water tank is transported to boiler by high-temperature pump, and the work of high-temperature pump is controlled by the water level controller on the boiler body.Like this outside the factor that parts such as valve, pump, pipeline run, emit, leak in remover, device must moisturizing, can save great lot of water resources, again because do not mend unboiled water, device has also just been stopped because of advancing in the air that unboiled water brings into oxygen and carbon dioxide to the corrosion of equipment, so can establish oxygen-eliminating device and sodium ion exchanged water treatment facility in the device again.

Compared with prior art, the beneficial effect that the utlity model has is: working medium (water) circulates various in the device of complete closed with the phase deformation states of vapour-liquid-vapour, avoided the loss of condensed water, condensed water can all be reclaimed and be recycled, and has improved the thermal efficiency of heating plant to greatest extent; When installing the hot device shutdown of usefulness in main or arm in service, device remains barotropic state, stoped effectively because of outside air and infiltrated the corrosion of oxygen and carbon dioxide that device causes system equipment, and avoided device to produce the problem that incondensable gas influences heat exchange, improved operating efficiency with hot equipment.Owing to the water-filling jar is housed, need not refill valve and drain valve in addition, simplify the structure, reduce cost with hot equipment with hot equipment; Except that above-mentioned advantage, the low level liquid collecting jar that is provided with in device also has decontamination function, and water tank has scrubbing, the degassing purifies and the function of moisturizing.

Description of drawings

Fig. 1 is the theory structure schematic diagram of an embodiment of heating plant described in the utility model.

Fig. 2 is the schematic diagram of standby pipeline portions among Fig. 1.

Fig. 3 is the structural representation with hot filling apparatus water pot.

Fig. 4 is the structural representation of the hot filling apparatus water pot of split type usefulness.

Each label title is respectively among the figure: 1-low level liquid collecting jar, 2-water level controller, 3-high-temperature pump, 4-two phase flow main, 5-water-filling jar, 6-overflow pipe, the hot equipment of 7-, 8-steam branch pipe, 9-low-voltage tube, the 10-water tank, 11-high-temperature pump, 12-boiler, the 13-cross over pipe, 14 main steam header, 15-gas-distributing cylinder, 16-standby pipeline, 17-steam main, 18-indirect steam boiler, the 19-secondary steam pipe, 20-bypass pipe, 21-magnetic valve, the 22-pressure-reducing valve, 23-magnetic valve, 24-tedge, the 25-steam inlet pipe, the 26-air space, 27-valve, 28-exhaust steam valve.Heavy line is represented steam pipe in the accompanying drawing; Fine line is represented control circuit; The short line segment dotted line is represented the two phase flow pipe; Long line segment dotted line is represented condensate pipe.

The specific embodiment

Below with reference to accompanying drawing the utility model content is described further, but practical application form of the present utility model is not limited in illustrated embodiment.

Referring to accompanying drawing, Industrial Boiler closed circulating phase-change heating plant described in the utility model is by boiler 12, water tank 10, gas-distributing cylinder 15, high-temperature pump 3,11, form with hot equipment 7, low level liquid collecting jar 1, indirect steam boiler 18, main steam header 14, steam main 17, steam branch pipe 8 and corresponding valve and connecting line etc.Boiler 12 passes to water tank 10 and gas-distributing cylinder 15 respectively by main steam header 14, the steam main 17 that is connected with the venthole of gas-distributing cylinder 15 is equipped with standby pipeline 16, the steam branch pipe 8 in standby pipeline 16 downstreams is connected with each air intake with hot equipment 7 and indirect steam boiler 18, and wherein an arm low-voltage tube 9 and low level liquid collecting jar 1 top are communicated with.All be connected with water-filling jar 5 in bottom, can adopt monolithic construction, also can adopt split-type structural as shown in Figure 4 with hot equipment 7 and water-filling jar 5 with hot equipment 7 and indirect steam boiler 18.Water-filling jar 5 is connected with two phase flow main 4 by overflow pipe 6 separately, two phase flow main 4 is connected the top of low level liquid collecting jar 1, low level liquid collecting jar 1 is equipped with water level controller 2, be connected with high-temperature pump by control circuit, the water inlet pipe of high-temperature pump 3 is contained in the bottom of low level liquid collecting jar 1, the top of outlet pipe and water tank 10 is communicated with, and the water inlet pipe of high-temperature pump 11 and water tank 10 bottoms are communicated with, and the inlet of outlet pipe and boiler 12 is communicated with.Be connected with control circuit between the steam chest of boiler 12 upper drums.Main steam header 14 is connected by cross over pipe 13 and water tank 10 top air intakes, makes the pressure balance of boiler 12 and water tank 10.The indirect steam boiler 18 that is provided with in the device can provide steam to the hot equipment of the usefulness of steam direct heat transfer.The apparatus structure of this set embodiment is relatively simple.

Standby pipeline 16 in the utility model is contained in the downstream of steam main 17, its structure as shown in Figure 2, form by the steam main section and the bypass pipe 20 that are parallel on the steam main 17, magnetic valve 21 is housed, pressure-reducing valve 22 and magnetic valve are housed on bypass pipe 20 in the steam main section of standby pipeline 16.Install in servicely, when closing magnetic valve 21, open magnetic valve 23 post-decompression low-pressure steams and charge into all devices and pipeline on the steam main 17, in the blocking-up outside air infiltration system, make equipment of this part and pipeline be in holding state.

In Fig. 1 and apparatus structure shown in Figure 3; air space 26 temperature and pressures of any inside when shutting down with hot equipment 7 descend; the effect that is subjected to low level liquid collecting jar 1 back pressure the water of water-filling jar 5 by tedge 24 the air spaces 26 that are pressed into hot equipment 7, reach the water seal effect.10 of water tanks are by cross over pipe 13 delivering vapors, prevent that high-temperature pump 11 from crossing the low cavitation that produces because of back pressure, safeguard high-temperature pump 11 operate as normal.On steam supply pipe, adorn valve with 7 of hot equipment, then needn't adorn valve on the water pipe with fixed attention.When closing, should open the valve 27 on the gland steam exhauster, make exhaust steam valve 28 in running order with the steam inlet pipe 25 of hot equipment 7.

In this device, overflow pipe 6, two phase flow main 4 are the operation of two phase flow state, and the forward and backward pipeline that is connected with high-temperature pump 3,11 is liquid full packages operation.

The low level liquid collecting jar 1 that is provided with in this device also has decontamination function, and water tank 10 has scrubbing, the degassing purifies and the function of moisturizing.

Claims

1, a kind of Industrial Boiler closed circulating phase-change heating plant, contain boiler (12), water tank (10), gas-distributing cylinder (15), high-temperature pump (3,11), the hot equipment of a plurality of usefulness (7), the low level liquid collecting jar (1) of water level controller (2) is housed, indirect steam boiler (18), main steam header (14), steam main (17), many steam branch pipes (8) and connecting line, it is characterized in that: boiler (12) gas transferring port is communicated with by main steam header (14) and gas-distributing cylinder (15) air intake, gas-distributing cylinder (15) venthole is communicated with steam main (17) air intake, steam main (17) is communicated with each steam branch pipe (8), and each steam branch pipe (8) venthole is communicated with the air intake of hot equipment of corresponding usefulness (7) and indirect steam boiler (18) respectively; The top air intake of low level liquid collecting jar (1) is communicated with by an arm low-voltage tube (9) and steam main (17); In the downstream of steam main (17) standby pipeline (16) is housed; On the pipeline of main steam header (14), be arranged with a cross over pipe (13) that is connected to water tank (10) air space; All be connected with water-filling jar (5) with hot equipment (7) and indirect steam boiler (18) bottom, each water-filling jar (5) is connected with two phase flow main (4) by overflow pipe (6) separately, the liquid outlet of two phase flow main (4) passes to the inlet of low level liquid collecting jar (1), the liquid outlet of low level liquid collecting jar (1) bottom is connected with the inlet of water tank (10) by high-temperature pump (3), and the delivery port of water tank (10) bottom passes to the water inlet of boiler (12) by high-temperature pump (11).

2, Industrial Boiler closed circulating phase-change heating plant according to claim 1, it is characterized in that: standby pipeline (16) is made up of the steam main section and the bypass pipe (20) that are parallel on the steam main (17), steam main section at standby pipeline (16) is equipped with magnetic valve (21), and pressure-reducing valve (22) and magnetic valve (23) are housed on bypass pipe (20).

3, Industrial Boiler closed circulating phase-change heating plant according to claim 1, it is characterized in that: overflow pipe in the device (6), two phase flow main (4) are the operation of two phase flow state, and the forward and backward pipeline that is connected with high-temperature pump (3,11) is liquid full packages operation.

4, Industrial Boiler closed circulating phase-change heating plant according to claim 1 is characterized in that: provide steam by the indirect steam boiler (18) that is provided with in the device to the hot equipment of the usefulness of steam direct heat transfer.

5, Industrial Boiler closed circulating phase-change heating plant according to claim 1 is characterized in that: hot equipment of the usefulness in the device (7) and water-filling jar (5) are monolithic construction or split-type structural.