JPH08229346A - Device for blowing chemical for dry desalting in waste gas treating equipment - Google Patents

Abstract

PURPOSE: To minimize the floor space, to facilitate operation control and to reduce the initial cost and running cost. CONSTITUTION: This device consists of one air blower 6 and the first and second branch passages 9A and 9B branched from an air passage from the blower 6 and connected to a waste gas passage 3. Further, a first part 8A for feeding a reactant such as slaked lime to the first branch passage 9A, a second part 8B for feeding an assistant to the second branch passage 9B and the first and second constant-flow valves 10A and 10B disposed respectively to the branch passages 9A and 9B and setting the air flow rate at the respective chemical feed positions are furnished, and the only one blower 6 is needed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an exhaust gas for removing harmful substances in exhaust gas discharged from facilities such as refuse incinerators by performing dry desalination treatment by blowing a chemical agent into the exhaust gas. The present invention relates to a treatment facility, and more particularly to a chemical blowing device for dry desalination treatment.

[0002]

2. Description of the Related Art The exhaust gas discharged from a refuse incinerator is subjected to a dry desalting process by blowing a chemical such as slaked lime into the exhaust gas to remove harmful substances (HCl, S, etc.) in the exhaust gas.
(O _x, etc.) has already been removed.

A conventional exhaust gas treatment facility of this type has a structure as shown in FIGS. The exhaust gas treatment facility shown in FIG. 3 is for removing harmful substances in exhaust gas by performing dry desalination treatment by blowing two kinds of chemicals into exhaust gas discharged from one waste incinerator 1. is there.

That is, the combustion exhaust gas discharged from the boiler part of the refuse incinerator 1 is cooled in the temperature control tower 2 and then, when passing through the exhaust gas passage 3, a reaction agent such as slaked lime and an auxiliary agent are blown into the combustion exhaust gas to be generated. The salt of the reaction material is collected together with fly ash by the dust collector 4 including a bag filter, and the harmless exhaust gas is discharged from the chimney 5 to the atmosphere. The auxiliary agent is blown in to increase the air permeability in the dust collector 4. In the exhaust gas treatment facility, first and second blower devices 6A and 6B for sending air under pressure, and first and second blower passages 7A and 7B connected to the exhaust gas passage 3 from these blower devices 6A and 6B, respectively. A first chemical supply unit 8A for supplying the reactant to the air passage 7A and a second chemical supply unit 8B for supplying the auxiliary agent to the air passage 7B. For example, the first blower device 6A has a blower capacity of 350 Nm ³ / h and the motor power consumption is 5.5 kw, and the second blower device 6B has a blower capacity of 180 Nm ³ / h. A motor with a power consumption of 3.7kw is used.

On the other hand, in the exhaust gas treatment equipment shown in FIG. 4, one kind of chemical is blown into the exhaust gas discharged from the two waste incinerators 1A and 1B, and then dry desalination treatment is performed to remove the waste gas from the exhaust gas. It removes the harmful substances. Here, 2A and 2B are temperature control towers, 3A and 3B are exhaust gas passages, 4
A and 4B are dust collectors and 5A and 5B are chimneys. First and second blower devices 6 for sending air under pressure to the exhaust gas treatment facility.
A, 6B, first and second blower passages 7A, 7B respectively connected to the exhaust gas passages 3A, 3B from the blower devices 6A, 6B, and chemical supply for supplying a reactant to the blower passages 7A, 7B And a section 8 are provided.

[0006]

However, according to the above conventional exhaust gas treatment equipment, the chemicals and the refuse incinerator 1A,
Since the number of the blower devices 6A and 6B increases according to the number of 1B, the installation area of mechanical equipment such as the blower devices 6A and 6B becomes large, and the blower devices 6A and 6B also become large.
A lot of trouble and time are required for operation management of B. Further, since a large number of small capacity blower devices 6A and 6B are installed, there is a problem that the initial cost and running cost increase.

The present invention solves the above-mentioned problems, and it is possible to minimize the installation area, facilitate operation management, and reduce initial costs and running costs. An object of the present invention is to provide a blowing device for salt treatment chemicals.

[0008]

In order to solve the above problems, the present invention removes harmful substances in the exhaust gas by injecting a plurality of chemicals into the exhaust gas passing through the exhaust gas passage to perform dry desalination treatment. In a chemical blowing device for dry desalination treatment in an exhaust gas treatment facility, one blower device for feeding air under pressure and a plurality of branch passages connected to the exhaust gas passage by branching a blower passage from the blower device. And a plurality of medicine supply parts for supplying medicines to the respective branch passages, and a plurality of constant flow valves which are respectively provided in the respective branch passages and set the air flow rates of the respective medicine supply points.

Further, the present invention is a chemical agent for dry desalination treatment in an exhaust gas treatment facility for removing harmful substances in the exhaust gas by blowing chemicals into exhaust gas passing through a plurality of exhaust gas passages to perform dry desalination treatment. In the blower device, one blower device for pressure-feeding air, a plurality of branch passages each of which is formed by branching an air passage from the blower device and connected to each exhaust gas passage, and a chemical agent is supplied to each branch passage. It is provided with a medicine supply section and a plurality of constant flow valves which are respectively provided in the respective branch passages and set the air flow rate of the respective medicine supply points.

[0010]

[Operation] With the above configuration, a constant flow valve is provided according to the number of exhaust gas passages from the refuse incinerator, etc. and the number of chemicals, and only one blower device is required, so the installation area is minimized. In addition, the operation cost can be controlled easily, and the initial cost and running cost can be reduced.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that those having the same functions as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 schematically shows an exhaust gas treatment equipment according to an embodiment of the present invention.
Plural kinds of chemicals are blown into the exhaust gas discharged from the refuse incinerator at a certain location, and then dry desalination treatment is performed to remove harmful substances in the exhaust gas.

As shown in FIG. 1, in this exhaust gas treatment facility, one blower device 6 for sending air under pressure and a blower path from this blower device 6 are branched and connected to an exhaust gas passage 3. 1, first and second branch passages 9A and 9B, a first chemical supply portion 8A for supplying a reactant such as slaked lime to the first branch passage 9A, and a second for supplying an auxiliary agent to the second branch passage 9B Of the medicine supply unit 8B and the branch passages 9A and 9B, respectively, for setting the air flow rate of each medicine supply location.
Second constant flow valves 10A and 10B are provided. The blower device 6 has, for example, a blowing capacity of 530 Nm.
^A motor with a power consumption of 5.5 kw at ³ / h is used.

In the above structure, the air pressure-fed from the blower device 6 is set to a predetermined amount by the first and second constant flow valves 10A and 10B, for example, the blowing capacity of the first branch passage 9A side is 350 Nm ³ / h. The blast capacity on the side of the branch passage 9B of 2 is 18
It is distributed so that it will be 0 Nm ³ / h. Therefore, an appropriate amount of the reactive agent or auxiliary agent such as slaked lime is blown into the exhaust gas passage 3, and the salt of the generated reactive material is favorably collected together with the fly ash in the dust collector 4 to render the exhaust gas harmless. Are emitted from the chimney 5 to the atmosphere.

A constant flow valve 10 is provided according to the number of medicines.
By providing A and 10B so that only one blower device 6 is required, the installation area can be minimized, operation management can be facilitated, and initial cost and running cost can be reduced. You can

It is possible to provide only the first and second branch passages 9A and 9B without providing the constant flow valves 10A and 10B. In this case, the reaction agent such as slaked lime is the first. Since the branch passage 9A is easily clogged, the flow rate on the side of the second branch passage 9B becomes excessive at this time and the amount of auxiliary agent blown in increases, resulting in severe wear of the second branch passage 9B. However, there arises a problem that the blowing amount of each drug varies. Therefore, the constant flow valve 10
By providing A and 10B, for example, the first branch passage 9
Even when A becomes clogged, the flow rate of each branch passage 9A, 9B is made constant accordingly, so that the injection amount of each medicine fluctuates and the wear of the second branch passage 9B becomes severe. Is prevented.

FIG. 2 schematically shows an exhaust gas treatment equipment according to another embodiment of the present invention. This exhaust gas treatment equipment uses one kind of chemical for exhaust gas discharged from two refuse incinerators. Blow-in, and then dry desalting treatment is performed to remove harmful substances in the exhaust gas.

As shown in FIG. 2, in the exhaust gas treatment facility, one blower device 6 for pressure-feeding air and a blower path from the blower device 6 are branched to form first and second exhaust gas passages. First and second branch passages 9 connected to 3A and 3B
A and 9B, a chemical supply unit 8 that supplies a reactive agent such as slaked lime to the branch passages 9A and 9B, and first and second installed in the branch passages 9A and 9B to set the air flow rate of each chemical supply point. Second constant flow valves 10A and 10B are provided.

Also in this embodiment, the air pressure-fed from the blower device 6 is the first and second constant flow valves 10A and 10B.
To make a predetermined amount. Reactive agents such as slaked lime are blown into the exhaust gas passages 3A, 3B in appropriate amounts, and the salt of the generated reaction substances is collected with the dust collector 4 together with fly ash.
The exhaust gas that has been satisfactorily collected and detoxified is discharged from the chimney 5 to the atmosphere.

A constant flow valve 10 is provided depending on the number of medicines.
Since A and 10B are provided so that only one blower device 6 is required, the installation area can be minimized, operation management can be facilitated, and initial cost and running cost can be reduced. You can

In the above embodiment, the case of using two types of chemicals or two places of refuse incinerators 1A and 1B has been described, but it goes without saying that the same can be applied to more chemicals or refuse incinerators. Nor. It can also be applied to exhaust gas other than the waste incinerator.

[0022]

As described above, according to the present invention, a single blower device can be provided by providing constant flow valves according to the number of exhaust gas passages from waste incinerators and the number of chemicals. Therefore, the installation area can be minimized,
In addition, operation management becomes easy, and initial cost and running cost can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing an exhaust gas treatment facility according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing an exhaust gas treatment facility according to another embodiment of the present invention.

FIG. 3 is a diagram schematically showing a conventional exhaust gas treatment facility.

FIG. 4 is a diagram schematically showing a conventional exhaust gas treatment facility.

[Explanation of symbols]

 1, 1A, 1B Waste incinerator 3, 3A, 3B Exhaust gas passage 6 Blower device 8, 8A, 8B Chemical supply unit 9A, 9B Branch passage 10A, 10B Constant flow valve

Claims (2)

[Claims] 1. A device for injecting chemicals for dry desalination treatment in an exhaust gas treatment facility for removing harmful substances in the exhaust gas by performing dry desalination treatment by injecting a plurality of chemicals into exhaust gas passing through an exhaust gas passage. Therefore, one blower device for sending air under pressure, a plurality of branch passages connected to the exhaust gas passage by branching the air blow passage from the blower device, and a plurality of medicines for supplying a medicine to each branch passage An apparatus for injecting a chemical agent for dry desalination treatment in an exhaust gas treatment facility, comprising: a supply unit; and a plurality of constant flow valves that are respectively provided in each branch passage and set an air flow rate at each chemical agent supply location. 2. A chemical injecting device for dry desalination treatment in an exhaust gas treatment facility for removing harmful substances in the exhaust gas by injecting the chemical into exhaust gas passing through a plurality of exhaust gas passages to perform dry desalination treatment. Therefore, there is one blower device that sends air under pressure, a plurality of branch passages that are connected to each exhaust gas passage by branching the air blow passage from this blower device, and a drug supply that supplies a drug to each branch passage. And a plurality of constant flow valves each of which is provided in each branch passage and sets the air flow rate of each chemical supply location, wherein a chemical spraying device for dry desalination treatment in an exhaust gas treatment facility is provided.