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Starch By-product Recovery System

By-products worth $150-$300 per ton reclaimed by starch recovery system.

Recovering starch granules from potato-processing waste streams can reduce BOD loading bу a thirds, and also save valuable byproducts worth from $180 to $300 per to depending on quality and whether it’s dry or wet finished product.

Improved hydrocyclones have demonstrated substantial per­formance benefit over the older three-inch diameter units. The processor may increase starch recovery economics up to 50 % higher than before. The new unit approaches the capability previously available only in expensive, high-speed starch centrifuges. The new hydrocyclone has but 10-mm (or as large as 15-mm) diame­ter cylindrical/conical bodies (устройства, детали цилиндроконической формы) compared to the eight-times larger diameter (диаметр в 8 раз больше ) of the old three-inch cyclones (трех­дюймовые циклоны ). Smaller diameter hydraulic velocity increas­es the centrifugal effect separation capacity. Further separa­tion advantage over the older unit results from the internal thinner layer of[ wash water within the hydrocyclone, with the result that starch granules travel through but one-eight the thickness of cycloning water for separation.(через 1/8 толщину слоя воды в циклоне).

These advanced units use the operational requirements of constant feed-pressure (постоянное давление при наполнении) and back pressure by a unique assembly of 20 small hydocyclones in a special canister (комплект 20 гидроциклонов в спецканистрах) Engineer­ed package assemblies (упакованные комплекты основных узлов машины), complete with proper pumps, sample cocks, and counter-current piping circuits (циклон с противотоком) simplify instal­lation and assure designed performances. (предусмотренная эксплуатация).

Hydrocyclones successfully extract starch from corn, wheat, and potato wash waters, and have proven superior in counter-cur­rent washing stages of starch refining washwaters with reduced water usage and power costs (со сниженным использованием воды и затратами энергии). The units may deliver up to 22° Baume conti­nuously. Optional engineered systems mау yield up to 98-99 % avai­lable starch recovery compared to the 60-70 % range of elder units.

The 22° Baume starch produced bу the new hydrocyclone system may be marketed (может быть дана в продажу) or transported as a concentrate, or may be dried into powder form. The decanter cen­trifuge will economically produce up to 50 % solids cake (лепешка с 50 % содержанием твердого вещества), a material suitable for most driers.

The most common starch-recovery system pumps screen waste water through a serea of two-stage, three-inch diameter hydrau­lic cyclones. These cyclones develop “centrifugal settling" (цен­тробежное осаждение) of insoluble starch particles. A slurry of starch granules discharges continuously from the bottom of the conical section. A two-stage cyclone receives a thin slurry dis­charge from the first stage, then pumps it with additional puri­fication fresh water to the second stage.

 

Пояснения к тексту

 

BOD (biochemical oxygen demand) - биохимическая потребность кис­лорода (критерий для оценки загрязнения сточных вод);

Baume - градус Бомэ (величина для измерения плотности).

 

I. Найдите в тексте А предложения с распространенным препози­тивным определением, скажите, чем оно выражено. Переведите эти предложения письменно.

 

II. Ответьте на вопросы:

 

1. What is the separation advantage of the starch by-product recovery system over the old units?

2. The separation capacity of the new system is increased, isn't it?

3. What do hydrocyclones extract starch from?

4. What was the starch recovery of the older units? And what is the starch recovery of the new hydrocyclone?

5. Do these advanced units deliver up to 22° Baume continuously?

6. How many per cent is the starch recovery economics higher with the new unit?

7. How is the installation symplified by?

 

III. Перескажите основное содержание текста, используя ответы упражнения II в качестве плана. Используя свой план, перескажите текст, опираясь на предложенную схему.

 

The plan for rendering a newspaper article The language to be used while rendering the article
The title of the text article The article is headlined… The title of the article is…
The author of the article, where and when the article was published   The author of the article is… The article is (was) published in…  
The message/the main idea of the article   The article is about… The article is devoted to…    

TEXT B

 

Прочитайте текст и выразите основную мысль каждого абзаца на русском языке. Сделайте сообщение на русском языке об использовании новой системы компанией Belle River и всех ее преимуществах.

Discostrainer Unit

(Strainer screen)

 

Belle River Canning in Belle River Ontario (консервный за­вод в Бель Ривэ, штат Онтарио) packs both whole tomatoes and juice. Searching for ways (изыскивая путь к) to improve operating efficiency the company felt that much of their potential profit was drawing out of plant with the wastewaters (доход вытекает со сточными водами). Cans were hand packed and overfilled with whole tomatoes to achieve proper can weight and content (надлежащий вес и наполнение банки) after the cooking and sealing pro­cess (процесс герметической запайки банок). This overfill (переполнение) meant wasted product as the excess (избыточные) tomatoes and juice fell onto the conveyors and washed down. Effluent (вытекающая жидкость) from their peeler also is wasted due to its lye content (из-за содержания в ней щелочи). This led to very high BOD and solids loading to their wastewater which the city could not accept. The company had to install the pretreatment equipment for their plant wastewater, which was costly to maintain and run (дорогое в обслуживании и эксплуатации).

When a tested Discostrainer unit on their wastewater the screen removed 75-85 % solids and up 45 % BOD from the total plant effluent. This led them to install (это привело к установлению) a model DS 484 Discostrainer unit equipped with 44 micron (0017-inch) screen openings for use in this innovative process to both product waste and wastewater problems.

The system allowed Belle River to discontinue their use (позволила фирме прекратить использование щелочи) and use their pre­sent peeler with hot water instead, which works equally will. Peeler effluent is pumped at 120 gpm over an existing 36-inch wide static screen with 030 in. openings to remove peels arid seeds. These solids are used as animal feed (пища для скота).

The static screen filtrate falls by gravity to the new Discostrainer screen. This is operated at the slowest possible speed; (1.2 rpm) in order (с тем чтобы) to achieve maximum fine solids capture. From the Discostrainer tomato solids are captured and collected in large vats. Effluent from the Discostrainer is wast­ed.

Some of the fine solids captured by the strainer are thinned and used to top up the cans of tomatoes which are then cooked, sealed and labled. The rest of the captured solids are added to the tomato juice production process.

How tomato cans no longer have to be overfilled (не надо переполнять банки), so a 5-10 % additional canned fruit is assured. Tomato juice production have been exceeded, and BOD loading (нагрузка на сточные воды) have been reduced. Lye is not purchased for the use in peeler.

 

 

ТЕКСТ С

Прочитайте текст С и переведите его, пользуясь словарем.

Heat Recuperator

 

1. A direct contact heat recuperator (рекуператор-подогреватель теплом отходящих газов) can deliver150-160°F process water by capturing (путем улавливания) waste energy from flue gases (дымовые газы). 2. According to manufacture (как утверждает фирма-изготовитель), the recuperator can improve overall system efficiency up to 98% by recovering energy from the flue gases of boilers, furnac­es (топка, печь), dryers, kilns (сушильная печь), etc. 3. The recu­perator operates by distributing (вводя) cold waters into a gas stream and capturing the heat that normally is wasted. 4. The heated water may then be used directly in the end process or it can be passed through an intermediate (промежуточный) heat exchanger to heat another liquid or gas stream. 5. The direct contact heat recu­perator is en economical multy-stage system that delivers 150-160°F water and offers a chance of payback (имеет шанс окупиться) in as little as 9-18 months.

6. Because the recuperator uses a uniquely (уникально) disigned tower to provide direct contact of water droplets (капли) with hot gases, no intermediate transfer surfaces (промежуточные поверхности переноса) are required and the potential of corrosion is re­duced. 7. An added benefit (дополнительная выгода) is scrubbing (улавливание) of particulates (примесные частицы) from the flue gas stream.

8. A typical Trane Thermal (название фирмы) heat recuperator consists of a vertical tower with water distribution pipework (трубопровод с водораспределителем), gas-liquid contact zone, hot-gas inlet (впускное отверстие) and outlet fain (выпускная лопасть). 9. Construction is of corrosion resistant materials (стойкие к корозии материалы) and units are available with nominal flue gas ra­tings (номинальная проходная мощность дымового газа) of from 1.600 to 80.000 pounds per hour at temperatures up to 1000 F. Heat recuperator uses waste heat to deliver 150-160º F process water.

 

 

Figure 1 illustrates how the direct contact heat recuperator works. Heat captured by droplets of cold water distributed into the flue gas stream are then used in a process or heat exchanger to heat another liquid or gas stream.

 

Figure 1. The work of the direct contact heat recuperator.

 

 

I. Какие из данных предложений служат ответами на следующие во­просы.

 

1) Why is the efficiency of the direct contact heat recuperator so high?

a) Because the recuperator uses a uniquely disigned tower to pro­vide direct contact of water droplets with hot gases.

b) Because the construction is of corrosion resistant materials.

c) Because the recuperator operates by distributing cold water into the flue gases of boilers and kilns and capturing the heat that normally is wasted.

2) Why does the direct contact recuperator provides the environment?

a) Because the construction is of corrosion resistant materials and the potential of corrosion is reduced.

b) Because the recuperator provides scrubbing of particulates from the flue gas stream.

c) Because the recuperator uses a uniquely disigned tower to pro­vide direct contact of water droplets with hot gases and no intermediate transfer surfaces are required.

 

II. Переведите письменно предложения 1, 2, 3, 5, 6 и 8. Найдите в них и запомните ключевые слова.

III. Разбейте текст на смысловые абзацы, озаглавьте их.

IV. Используя план упражнения III и выученные ключевые слова, коротко рас­скажите о тепловом рекуператоре

UNIT VI

Последнее изменение этой страницы: 2016-07-23

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