JPH05245327A - Exhaust gas desulfurization dust removing device - Google Patents

Abstract

PURPOSE:To effectively perform exhaust gas treatment with good efficiency and without contaminating environment when gas temp. is high and when harmful gas is simultaneously removed by treating exhaust gas by a desulfurization dust removing device which a dehumidifying unit using waste heat, a washing dust removal unit and a purifying unit are combined to form. CONSTITUTION:In a tank 1 having a suction opening 2 and an exhaust opening 3 of exhaust gas is installed a dehumidifying unit using waste heat A where purified gas flows in and out to perform heat giving and receiving. In the poststage a washing dust removal unit B which communicates with the exhaust opening 3 and where a separation tank 10 equipped with an inlet 11, an outlet 12 and a water tank 18 is provided and where a nozzle 27 turned diagonally backwards and a shielding wall plate 15 are arranged on the inner wall and near the outlet 12 of the separation tank 10, respectively. The outlet 12 communicates with an inflow opening 6 to circulate the exhaust gas through the units A, B. Further, a water tank 8 and the nozzle 27 of the unit B communicate with a purifying unit C having a filter 25 which is attachable and detachable through a pump 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas desulfurization dust remover suitable for high gas temperatures and for removing harmful gases at the same time.

[0002]

2. Description of the Related Art Industrial development increases the amount of pollutants from factories, mines, transportation facilities, etc., while urban development increases the amount of pollutants emitted from homes, offices, etc.
Air pollution has become an important issue for public health and economic reasons.

The main pollutant of the atmosphere is generated by the exhaust gas generated by the combustion of fuel, and the main substances that are generated during the combustion of fuel and pollute the atmosphere are solids such as coal, fine particles of coke, carbon or soot. Particles and ash, liquid or semi-solid particles of tar-like substances, sulfuric acid mist, and gases such as hydrocarbons, carbon monoxide, nitrogen oxides, and sulfurous acid gas.

However, conventionally, as an exhaust gas cleaning and dust collecting apparatus suitable for the case where the temperature of the exhaust gas is high and the case where the harmful gas is contained, a cleaning liquid atomizing section, a gas contact section, a gas-liquid separation are usually used. Exhaust gas cleaning dust collectors consisting of a solid part and a solid liquid part are known in various types.

[0005]

However, in the conventional cleaning and dust collecting apparatus, a mist remover and subsequent waste water treatment are required, and the exhaust gas temperature is lowered, so that the gas diffusion from the chimney is deteriorated and the pollutant concentration in the environment is reduced. There was a problem such as getting expensive.

[0006]

The present invention has been made to solve the above problems, and is configured as follows. Hereinafter, each embodiment shown in FIGS. 1 and 2 will be described in detail with reference to the drawings.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, A is an inlet / outlet 6 of a purified gas which surrounds an exhaust gas flow path S in a tank 1 having front and rear exhaust gas inlets and exhaust ports 2 and 3 for exchanging heat with the exhaust gas. , 7
Is a dehumidification unit utilizing exhaust heat having a heat exchanger configuration.
In the exhaust heat utilizing dehumidification unit A, the front chamber 4 and the rear chamber 5 which are exhaust gas chambers in the tank 1 are respectively communicated by a plurality of communication pipes 8, and each of the communication pipes 8 is connected to the exhaust gas passage S. Is composed of. Further, in the tank 1, a hanging plate 9 for partitioning the inflow port 6 and the outflow port 7 is vertically installed at a central portion to form a bypass passage for the cleaning gas. Next, B has a nozzle 27 facing obliquely backward (downward) on the inner wall of the separation tank 10 having a front inlet 11 and a rear outlet 12 communicating with the exhaust port 3 and having a water tank 18 below the outlet 12. Cleaning in which the outlet 12 provided with a barrier plate 15 having a plurality of cutout weir plates 16 at the tip thereof in the vicinity of the outlet 12 at the rear (lower side) of the outlet 12 is communicated with the inlet 6 of the dehumidification unit A using exhaust heat. It is a dust collection unit. In FIG. 1, 14 is a rear chamber and 17 is a through hole. Further, 19 is a drain port of the water tank 18, and 20 is a drain port. Further, C is the entrance 22 and the exit 23.
It is a purification unit in which a detachable filter 25 is mounted on a support plate 26 in a processing tank 21 with a cover 24 having a. The purification unit C is the processing tank 2
The inlet 22 of No. 1 is connected to the drain 19 of the cleaning and dust collecting unit B by the drain pipe 30, and the outlet 23 is connected to the nozzle 27 of the cleaning and dust collecting unit B by the water pipe 31 of the pump 32. There is. In addition, 29 is a ventilation pipe, 33 is an exhaust pipe, and 34 and 35 are baffles.

[0008]

First, the pump 32 is operated to pump the filtered treated water in the treatment tank 21 of the purification unit C to the nozzle 27, and the washing water is obliquely rearwardly fed into the separation tank 10 of the washing and dust collecting unit B from the nozzle 27 ( The fuel is jetted in the downward direction 28. Then, the polluted high-temperature exhaust gas (for example, exhaust gas of diesel automobile) is sucked from the suction port 2 of the tank 1 of the exhaust heat utilizing dehumidification unit A, and from the exhaust port 3 into the separation tank 10 of the next cleaning and dust collecting unit B. It is fed from the inlet 11 and discharged from the outlet 12. However, at this time, the separation tank 10
Cleaning water is jetted from the nozzle 27 to the exhaust gas flowing from the front (upper) to the rear (lower), and the dust and various dusts mixed with the exhaust gas increase in specific gravity due to contact with the water, and the lower water tank. Settle into 18. In this case, SO _{χ, which} is the most harmful exhaust gas in the exhaust gas, which is considered to be a source of air pollution, is also absorbed and removed by water. Then, the cleaning gas cleaned by contact with the water bypasses the tip portion of the barrier plate 15 and enters the tank 1 of the dehumidifying unit A using exhaust heat from the outlet 12 through the exhaust pipe 33, the inflow port 6, and the like. Heat exchange (heat exchange) is performed with the high temperature exhaust gas flowing in each communication pipe 8 in contact with the communication pipe 8, the cleaning gas is warmed and dehumidified, and is discharged into the outside air from the outlet 7. .. Further, the water accumulated in the water tank 18 of the cleaning and dust collecting unit B is transferred into the processing tank 21 of the purification unit C via the drain pipe 30, and is automatically filtered and purified by the filter 25. Then, the purified water is pumped by the pump 32 through the water pipe 31 to the nozzle 27 of the cleaning and dust collecting unit B, and is repeatedly used for cleaning and dust collecting of the exhaust gas. Further, the filter 25 is properly removed and pulled up, and the mixed substances such as dust, dust, and impurities are discarded.

Further, as shown in FIGS. 1 and 3, the nozzle 27 in the cleaning and dust collecting unit B is replaced by a horizontal separation tank 1
The exhaust gas and the cleaning water are separated as shown in FIG. 1 by providing two ones on each of the left and right sides of 0, and by arranging one for the upward oblique rearward direction and the other for the downward oblique rearward direction. In the tank 10, they are well mixed and swirled to facilitate the cleaning and dust collecting effect.

In another embodiment shown in FIG. 4, exhaust gas is sucked in and out, and an exhaust gas flow path S in a tank 1 having exhaust ports 2 and 3 is surrounded to perform heat exchange with the exhaust gas. The lower chamber 3 is partitioned by the exhaust heat-dehumidifying unit A of the heat exchanger configuration having the purified gas inflow and outlets 6 and 7 and the partition shield plate 36.
7 is disclosed a structure in which a lower end of a cooling unit D formed at an intake port 39 having a blower 41 and an upper end of an upper chamber 38 at an air supply port 40 opening to the atmosphere are adjacently arranged in front and rear. There is. Incidentally, 42 is a suction pipe connected to the suction port 2, 43 is an incinerator, and 44, 45, 46 are dampers.

[0011]

As described above, the device of the present invention is capable of simultaneously removing and purifying harmful gases having a high gas temperature such as exhaust gas of automobiles and mixing various dusts, dusts and impurities in the air. It has the effect of completely removing dust and the like.

Further, in the present invention, the cleaning water for exhaust gas cleaning dust collection is a system in which it is filtered and clarified by the purifying unit and repeatedly circulated for use, so that a mist remover and subsequent troublesome waste water treatment are not required. In particular, according to the present invention, since the purified gas obtained by cleaning, dedusting, and purifying the contaminated exhaust gas is finally warmed by exhaust heat in the dehumidifying unit utilizing exhaust heat, dehumidified, and discharged into the atmosphere, There are many excellent effects such as the problem that gas diffusion to the inside becomes worse and the pollution concentration of the environment becomes higher, and the maintenance is rational and economical. Further, it can also function as a flue gas desulfurization device that absorbs and removes sulfur oxide SO _χ from exhaust gas when burning fuel containing sulfur in a boiler or the like.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional explanatory view of an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional explanatory view of another embodiment of the present invention.

FIG. 3 is an explanatory diagram of a nozzle mounting portion according to the embodiment of this invention.

FIG. 4 is a vertical cross-sectional explanatory view of still another embodiment of the present invention.

[Explanation of symbols] 1 Tank 2 Suction port 3 Exhaust port 4 Front chamber 5 Rear chamber 6 Inlet 7 Outlet 8 Communication pipe 9 Hanging plate 10 Separation tank 11 Inlet 12 Outlet 13 Rear wall 14 Rear chamber 15 Barrier plate 16 Shredding Notch weir plate 17 Through hole 18 Water tank 19 Drain port 20 Drain drain 21 Processing tank 22 Through hole 23 Through outlet 24 Cover 25 Filter 26 Branch plate 27 Nozzle 28 Arrow direction 29 Vent pipe 30 Drain pipe 31 Water pipe 32 Pump 33 Exhaust pipe 34 35 Baffle 36 Partition shield 37 Lower chamber 38 Upper chamber 39 Air inlet 40 Air inlet 41 Blower 42 Suction pipe 43 Incinerator 44 45 46 Damper 47 Chimney A Dehumidification unit using exhaust heat B Cleaning dust collection unit C Purification unit D Cooling Unit S S Exhaust gas flow path

Claims (1)

[Claims] Intake of exhaust gas in front and rear, exhaust gas utilization dehumidification unit of heat exchanger configuration having an inflow and outflow of purified gas that surrounds an exhaust gas flow path in a tank having an exhaust port and exchanges heat with the exhaust gas, A nozzle facing obliquely rearward is provided on the inner wall of the separation tank having a front inlet and a rear outlet communicating with the above-mentioned exhaust port and having a water tank below the outlet, and a plurality of cutout weirs at the tip near the outlet behind the outlet. A cleaning dust collecting unit in which an outlet provided with a barrier plate having a plate is connected to an inlet of a dehumidifying unit utilizing exhaust heat, and a water tank and a nozzle of the cleaning dust collecting unit are connected to each other through a pump. An exhaust gas desulfurization / dust removal device comprising a purification unit having a detachable filter and performing desulfurization / dust removal of exhaust gas.