Incinerators for

Polystyrene has a high heating value, 46,000 kj/kg compared to heating oil, 44,000 kj/kg (46). Thus, incineration for its energy value is another possible appHcation for recovered polystyrene. 

Waste Treatment. Microwave energy has been studied for the desulfurization of coal (qv) and treatment of wastes (190). Developments in microwave incinerators for medical and radioactive wastes have occurred (191,192). Even a consumer unit for consumption of sohd household waste has been proposed (193). Economic factors remain a key barrier in these developments. 

These reactions tend to give few by-products. The main by-product in each case is the sulfide, RSR, which amounts to less than 3—5% of the thiols produced. Some of the sulfides produced have appHcations, although they tend to be much smaHer-volume requirements than the amounts produced. The sulfides can be incinerated for disposal, assuming that the incineration facility can handle high sulfur feedstocks. 

One physical method that has attracted some commercial interest is evaporation several evaporative plants were installed in Japan in the early 1970s, nearly all followed by incinerators for the sludge produced (60). They are, however, expensive in both capital and operating costs. The most recent evaporation systems use a process known as vapor recompression, which has the claimed advantage of much lower operating costs than the eadier evaporative processes used in the wool industry. Capital costs of these processes are still high. 

Also, wet air oxidation offers an alternative to conventional incineration for the destmction and detoxification of dilute ha2ardous and toxic waste waters. A 98% removal efficiency of dyehouse effluent has been claimed by wet air oxidation (203). 

Catalytic Incinerators Catalytic incinerators are an alternative to thermal incinerators. For simple reactions, the effect of the presence of a catalyst is to (1) increase the rate of the reaction, (2) permit the reaction to occur at a lower temperature, and (3) reduce the reactor volume. 

Local autliority control of au pollution covers a second tier of less-polluting processes. Incinerators for waste chemicals, or waste plastic arising from their manufacture, and other waste incinerators dependent upon size are, however, subject to both the BATNEEC and BPEO requirements under the IPC regime. 

Overview The U.S. Air Force has classified material that must be destroyed. Disintegrators provide an alternative to incineration for the destruction of classified materials. Disintegrators are able to handle the destruction of paper, thick documents, video cassettes, microfilm or reels, CD-ROMs, microfiche, and diskettes. Disintegrators are available with a capacity of 50 to over 7500 lbs. per hour. Disintegrators work in the following way ... 

Liquid injection incinerators are currently the most commonly used type of incinerator for hazardous waste disposal. A wide variety of units are marketed today, mainly horizontally and vertically fired types a less common unit is the tangentially fired vortex combustor. 

Jennings, M.S. (1985) Catalytic Incineration for Contrd of Volatile Organic Compound Emissions, Noyes Publishers. 

Only a little effort is necessary to reduce solvent 1 demand used during reaction scale-up. The quantity used in the laboratory stage was reduced to 59% in the operation stage (Table 5.1). However, related to substrate 2, 96% of solvent 1 is still used. Thus, 87% of the original quantity of solvent will be fed to the incinerator for disposal, while the recycle rate is only 9.1% (from 96% to 87%, Table 5.1). Considering that there is a factor of five difference in solvent 1 demand between the operation scale and the literature procedure (see the segments Solvent of the mass index, in Figure 5.10), the potential for optimiz-... 

Thiourea is a carcinogen and will be eliminated in future manufacturing facilities (2). Its use requires special equipment and expense, such as incinerators, for safety. 

Dunn and Tomkins (1975) discuss the design and operation of incinerators for process wastes. They give particular attention to the need to comply with the current clean-air legislation, and the problem of corrosion and erosion of refractories and heat-exchange... 

The following is a summary of items that should be considered when evaluating proposed or existing hazardous waste incinerators for public health acceptability10 ... 

Coincineration presents some advantages over the WTE process (incineration for energy generation). Table 1 compares the two processes. 

Monitoring of industrial and municipal incinerators for 2,3,7,8-TCDD emissions... 

NEUTREC A flue-gas desulfurization process, intended for treating the waste gases from incinerators for municipal, hospital, and industrial wastes. Sodium bicarbonate, optionally mixed with active carbon, is injected into the gases after the usual bag filter, and the solid products are removed in a second bag filter. Sodium compounds can be recovered from the product for reuse, and ary toxic compounds disposed of separately. Developed by Solvay and operated in Europe since 1991. 

The low temperature/low pressure operating process developed by AEA (Dounray, Scotland), known as Silver bullet , which allows one to process a wide range of waste types and compositions, cf. Table 24, makes it an attractive alternative to incineration for the more toxic and troublesome types of industrial organic wastes. 

Rarified Research operates a ram-fed incinerator for destruction of select wastes at its large, centralized research facility, including liquid flammable solvents in small plastic containers. The incinerator is fired by natural gas and is brick-lined. Temperatures are closely monitored, and stack emissions are routinely sampled. 

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