CN104713112B - Boiler dust removal circular processing system - Google Patents

Abstract

The present invention provides a boiler dedusting cycle treatment system, including: main deduster and auxiliary deduster, reaction tank, sedimentation tank, pump room sump, water cutoff safety protection device, the water cutoff safety protection device is used to start any one The main return water pump and/or the auxiliary return water pump, the present invention has the following beneficial effects: the water cutoff safety protection device enables any one of all return flow water pumps to be started independently, or two or more sets can be started at the same time, and the operation of the whole system is not affected by the water cutoff protector Restriction; when the return water pump is faulty and cannot run, the pump is empty or the fault trips, the solenoid valve is activated to supply water to the boiler dust collector, and at the same time an audible and visual alarm is issued to remind the operator that the equipment is faulty and the backup water is under control. When the circulating water pump When the pump is emptied or tripped due to a fault, the standby water is automatically opened to meet the boiler dust removal water and protect the safe and economical operation of the boiler.

Description

Boiler dust removal cycle treatment system

technical field

The invention relates to the field of boiler circulating water treatment, in particular to a boiler dust removal circulation treatment system.

Background technique

The boiler dust collector is that the flue gas enters the Venturi through the flue, and is evenly sprayed by water at the entrance of the throat. Due to the high-speed movement of the flue gas, the sprayed water is melted into fine water mist by the wet flue gas. Ash material, in this way, the ash material and water droplets collide and coagulate, especially the dust material with a small diameter can be dissolved by water mist and water.

Boiler dust collector is suitable for flue gas dedusting, smoke desulfurization and desulfurization of coal-fired, oil-fired boilers and kilns. It has the characteristics of low resistance, flexible installation and layout, high desulfurization efficiency and long service life.

According to different principles, boiler dust collectors can be divided into: acoustic wave dust collectors, pulse dust collectors, steam dust collectors, bag dust collectors, etc.

The existing boiler dedusting circulating water control system has a harsh environment, severe corrosion, and a high failure rate. It is strictly forbidden to run without water in the gauge flow packing. Poor ventilation and other safety hazards will affect the lives of workers and the safe and economical operation of boilers.

The existing boiler dedusting cycle treatment system cannot realize the separate control of the main dust collector and auxiliary dust collector, so that the circulating water can be recycled in all the dust collectors.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a boiler dust removal circulation treatment system, which is used to solve the problem that in the prior art, all dust collectors cannot be individually controlled, and circulating water cannot be circulated in all dust collectors. problem of use.

In order to achieve the above purpose and other related purposes, the present invention provides a boiler dust removal cycle treatment system, including: main dust collector and auxiliary dust collector, reaction tank, sedimentation tank, pump room sump, water cut-off safety protection device, the main dust collector The sewage outlet of the filter and the auxiliary dust collector is connected to the water inlet of the reaction tank, the water outlet of the reaction tank is connected to the water inlet of the sedimentation tank, and the water outlet of the sedimentation tank is connected to the sump of the pump room, and the water outlet of the pump room is connected to the water inlet of the sedimentation tank. The water outlet of the pool is connected to the water inlet of the main dust collector through the main return water pump, the water outlet of the sump in the pump room is connected to the water inlet of the auxiliary dust collector through the auxiliary return water pump, and the inlet of the main dust collector A water cut-off protector is provided on the water outlet, and the water cut-off safety protection device is used to independently start any main return water pump and/or auxiliary return water pump.

As a preferred mode, the water cut-off safety protection device includes a three-position double two-way twist switch SA, a start button SB1, a stop button SB2, an intermediate relay KA, a neutral line terminal com, and the incoming line of the water cut-off protector is connected to The outgoing lines are respectively connected to the said twist switch, and the 12 volt power supply from the PLC is connected to the start button SB1 after passing through the said twist switch SA to serve as the start-up power of the auxiliary return water pump.

As a preferred mode, the water cut-off safety protection device includes an electrode point pressure gauge P, an intermediate relay KA, a solenoid valve, an acousto-optic alarm, a time-delay relay KT, the time-delay relay KT, an intermediate relay KA, a solenoid valve, an acousto-optic After the four alarms are connected in parallel, they are connected to both ends of the 220V power supply via the electrode point pressure gauge P.

As a preferred mode, the sound and light alarm is installed in the operating room, the solenoid valve is installed on the standby water pipe, and the electrode point pressure gauge P is installed on the main pipe at the confluence of the return water pump.

As a preferred manner, the main dust collector includes No. 1 dust collector and No. 2 dust collector.

As a preferred mode, the sedimentation tank includes a primary sedimentation tank and a secondary sedimentation tank, the water outlet of the primary sedimentation tank is connected to the water inlet of the secondary sedimentation tank, and the water outlet of the secondary sedimentation tank is connected to the water inlet of the secondary sedimentation tank. Said pump station sump.

As a preferred manner, each dust collector is connected to a backup water source through a backup water pipe.

As a preferred mode, there are lime conveyors and mixers in the reaction pool.

As mentioned above, a boiler dedusting cycle treatment system of the present invention has the following beneficial effects: the safety protection device for water cutoff enables any one of all return water pumps to be started independently, or two or more of them can be started at the same time, and the operation of the whole system is not affected. Water cut-off protector limit; when the return water pump is faulty and cannot run, the pump is empty or the fault trips, the solenoid valve is activated to supply water to the boiler dust collector, and at the same time an audible and visual alarm is issued to remind the operator that the equipment is faulty and the backup water is under control. When the circulating water pump is empty or trips due to a fault, the backup water will be automatically opened to meet the boiler dust removal water and protect the safe and economical operation of the boiler.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a circuit diagram of the weak current part of the water cut off safety protection device according to the embodiment of the present invention.

Fig. 3 is a circuit diagram of the heavy current part of the water cut off safety protection device according to the embodiment of the present invention.

Part number description

1 main dust collector

101 No. 1 Dust Collector

102 No. 2 Dust Collector

103 No. 3 Dust Collector

2 Auxiliary dust collector

3 reaction cells

4 sedimentation tank

41 Primary sedimentation tank

42 Secondary sedimentation tank

5 Pump house sump

6 Water cut protector

7 lime bins

8 hoppers

9 spare hose

10 chimney

11 Operating room

12 Sound and light alarm

13 Solenoid valve

SA three-position double two-way toggle switch

SB1 start button

SB2 Stop button

KA intermediate relay

com neutral terminal

P electrode point pressure gauge

KA intermediate relay

KT time delay relay

detailed description

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

See Figures 1 through 3. It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated. The structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification for the understanding and reading of those who are familiar with this technology, and are not used to limit the conditions for the implementation of the present invention , so it has no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the disclosure of the present invention without affecting the functions and objectives of the present invention. The technical content must be within the scope covered. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without any substantial change in the technical content.

Before describing the embodiments of the present invention in detail, the application environment of the present invention will be described first. The existing boiler dedusting circulating water control system is only designed for the reuse of the dedusting wastewater of the main deduster after treatment. The auxiliary deduster can only use backup water sources such as well water for a long time during operation. In order to reduce the water consumption of the auxiliary deduster, It may be considered that the waste water reuse pipeline of the main dust collector is connected to the dust collector of the auxiliary furnace. The furnace does not have a water cut-off protector, and the auxiliary furnace uses circulating water, which requires the water pressure signal provided by the water cut-off protector of the main dust collector. Therefore, only the circulating water enters the main dust collector at the same time, so that the water cut-off protector of the main dust collector sends out a water pressure signal, and the whole set of sewage treatment can be completed. Only when the auxiliary dust collector is running, can the circulating water be used by the auxiliary dust collector. In this way, the water flow can only be diverted to meet the water cut-off protector. From the surface, the water flow cannot meet the water demand for auxiliary dust removal, and only a part of well water can be used to meet the needs of auxiliary dust removal.

The operation of the system is restricted by the water cut-off protector. The environment of lime desulfurization is harsh, the corrosion is serious, and the failure rate is high. Row.

It is strictly forbidden to operate without water shortage. If there is a shortage of water, the chimney will crack and the regular flow packing inside the desulfurizer will melt, which will cause safety hazards such as poor ventilation of the boiler flue, which will cause harm to the lives of employees and the safe and economical operation of the boiler. influences.

Please refer to Fig. 1-Fig. 3, the present invention provides a boiler dedusting cycle treatment system, including: main deduster 1 and auxiliary deduster 2, reaction tank 3, sedimentation tank 4, pump house sump 5, water cut off safety protection device, The sewage outlet of the main dust collector and the auxiliary dust collector is connected to the water inlet of the reaction tank, the water outlet of the reaction tank is connected to the water inlet of the sedimentation tank, and the water outlet of the sedimentation tank is connected to the sump of the pump room. The water outlet of the pump house sump is connected to the water inlet of the main dust collector through the main return water pump, and the water outlet of the pump house sump is connected to the water inlet of the auxiliary dust collector through the auxiliary return water pump. The water inlet of the dust collector is provided with a water cut-off protector 6, and the water cut-off safety protection device is used to independently start any main return water pump and/or auxiliary return water pump. In this embodiment, the auxiliary dust collector 2 is No. 3 dust collector 103 .

The main dust collector includes No. 1 dust collector 101 and No. 2 dust collector 102. 10 is a chimney.

The water cut-off safety protection device includes a three-position double two-way twist switch SA, a start button SB ₁ , a stop button SB ₂ , an intermediate relay KA, and a neutral terminal com. Connected to the twist switch, the PLC takes 12 volts of power and passes through the twist switch SA and then connects to the start button SB1 as the start-up power of the auxiliary return pump.

As shown in Figure 2, the working principle is: double three-position two-way toggle switch SA, take 12 volt power on the PLC, when the toggle switch is turned to manual, short-circuit the water cut-off protector, and at the same time supply the system with auxiliary return water pump 12 Volt starting power supply, after the system is running, any of the 3 backflow pumps can be started independently, or two or three backflow pumps can be started at the same time; when it is turned on automatically, the switch is connected in series to the circuit of the water cut-off protector, and the auxiliary backflow is disconnected at the same time 12 volt starter power for the water pump.

The water cutoff safety protection device includes an electrode point pressure gauge P, an intermediate relay KA, a solenoid valve 13, an acousto-optic alarm 12, a delay relay KT, and the time-delay relay KT, an intermediate relay KA, a solenoid valve 13, an audible and visual alarm After the four devices are connected in parallel, they are connected to both ends of the 220V power supply through the electrode point pressure gauge P.

In Figure 3, L is the 220 volt power terminal, N is the neutral terminal, P is the electrode point pressure gauge, KA is the intermediate relay, KT is the time delay relay, KT ₁ is the delay normally open contact, KA ₁ is the intermediate Relay normally open contact, KA ₂ is the normally open contact of the intermediate relay.

The circuit connection method is: take a 220 power supply, respectively enter the normally open contact of the electrode point pressure gauge, the normally open contact comes out to connect to the time delay relay KT, and at the same time enters the normally open contact of the delay relay, and the normally open contact comes out to enter the sound Light alarm and solenoid valve.

The working principle is: when the backflow pump fails to run, the pump is empty or the fault trips, there is no water pressure in the pipe, the electrode point is connected to the normally closed contact, and the time delay relay KT is powered on for 30 seconds (waiting for the water pressure in the pipe) Stable, imitating a false alarm when the water pump is started), the normally open contact is closed, the intermediate relay KA is energized and closed, and the solenoid valve 13 of the standby water control system is started to supply water to the boiler dust collector, and the sound and light alarm sends out a sound and light alarm signal at the same time , to alert the operator that the equipment has failed.

The acousto-optic alarm is installed in the operating room 11, the solenoid valve is installed on the standby water pipe 9, and the electrode point pressure gauge P is installed on the main pipe at the confluence of the return water pump.

Described settling tank comprises primary settling tank 41 and secondary settling tank 42, and the water outlet of described primary settling tank is connected to the water inlet of secondary settling tank, and the water outlet of described secondary settling tank is connected to described pump Housing pool.

Each dust remover is connected to a backup water source through a backup water pipe. An alternate water source such as well water may be used in an emergency.

There are lime conveyors and mixers in the reaction pool. A lime bin 7 and a hopper 8 are arranged on the lime conveyor.

As mentioned above, the water cut-off safety protection device of the present invention enables all return water pumps to be started independently, or two or more sets can be started at the same time, and the operation of the whole system is not limited by the water cut-off protector; When the pump is empty or trips due to a fault, the solenoid valve is activated to supply water to the boiler dust collector. At the same time, an audible and visual alarm is issued to remind the operator that the equipment is faulty and the backup water is under control. Automatically open to meet boiler dust removal water and protect the safe and economical operation of the boiler.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (8)

1. A boiler dedusting cycle treatment system, characterized in that it comprises: a main deduster and an auxiliary deduster, a reaction tank, a settling tank, a pump room sump, a water cut-off safety protection device, the main deduster and the auxiliary deduster The sewage outlet is connected to the water inlet of the reaction tank, the water outlet of the reaction tank is connected to the water inlet of the sedimentation tank, the water outlet of the sedimentation tank is connected to the sump of the pump room, and the water outlet of the sump of the pump room passes through the main The return water pump is connected to the water inlet of the main dust collector, and the water outlet of the sump in the pump room is connected to the water inlet of the auxiliary dust collector through the auxiliary return water pump. The water inlet of the main dust collector is provided with water cut-off protection device, and the water cut-off safety protection device is used to independently start any main return water pump and/or auxiliary return water pump. 2. The boiler dust removal cycle treatment system according to claim 1, characterized in that: the water cut-off safety protection device includes a three-position double two-way twist switch SA, a start button SB1, a stop button SB2, an intermediate relay KA, The neutral wire terminal com, the incoming and outgoing wires of the water cut-off protector are respectively connected to the switch SA, and the 12 volt power supply from the PLC passes through the switch SA and then connected to the start button SB1 as Starting power for the auxiliary return pump. 3. The boiler dedusting cycle treatment system according to claim 2, characterized in that: said water cut-off safety protection device includes electrode point pressure gauge P, intermediate relay KA, solenoid valve, sound and light alarm, time delay relay KT, all The delay relay KT, the intermediate relay KA, the solenoid valve, and the sound and light alarm are connected in parallel and then connected to both ends of the 220V power supply through the electrode point pressure gauge P. 4. The boiler dedusting cycle treatment system according to claim 3, characterized in that: the sound and light alarm is installed in the operating room, the solenoid valve is installed on the standby water pipe, and the electrode point pressure gauge P is installed on the return flow On the main pipe of the water pump collection. 5. The boiler dust removal cycle treatment system according to claim 1, characterized in that: the main dust collector includes No. 1 dust collector and No. 2 dust collector. 6. The boiler dedusting cycle treatment system according to claim 1, characterized in that: the sedimentation tank includes a primary sedimentation tank and a secondary sedimentation tank, and the water outlet of the primary sedimentation tank is connected to the secondary sedimentation tank The water inlet, the water outlet of the secondary sedimentation tank is connected to the sump of the pump room. 7. The boiler dedusting cycle treatment system according to claim 1, characterized in that: each deduster is connected to a spare water source through a spare water pipe. 8. The boiler dust removal cycle treatment system according to claim 1, characterized in that: there are lime conveyors and mixers in the reaction pool.