{"id":4592,"date":"2021-12-18T12:36:50","date_gmt":"2021-12-18T12:36:50","guid":{"rendered":"https:\/\/paramountlimited.com\/?page_id=4592"},"modified":"2024-09-25T11:43:50","modified_gmt":"2024-09-25T11:43:50","slug":"products_mee-forced-circulation","status":"publish","type":"page","link":"https:\/\/paramountlimited.com\/?page_id=4592","title":{"rendered":"PRODUCTS_MEE Forced Circulation"},"content":{"rendered":"\t\t
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MEE Forced Circulation<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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MEE Forced Circulation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Forced Circulation Evaporators are normally used for liquids which are prone to fouling, scaling, and crystallizing or for those which are inversely soluble or while concentrating thermally de-gradable materials. Here high re-circulation rate allows high liquor velocities through the tubes which help to minimize the buildup of deposits or crystals along the heating surface. The universal type, preferably used for concentration of solutions containing encrusting substances, hardening agents and un-dissolved solids, and for viscose solutions; also suitable for evaporative crystallization.<\/p>

The liquid is circulated through the calandria by means of a circulation pump, where it is superheated at an elevated pressure, higher than its normal boiling pressure. Since liquid circulation is maintained, the flow velocity in the tubes and the liquid temperature can be controlled to suit the product requirements independently of the pre-selected temperature difference.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Energy Efficiency:<\/strong><\/p>

Energy Efficiency of Paramount Evaporators and Crystallizers is a crucial consideration during the design of each customer’s specific application. Energy efficient systems utilize waste heat, multiple effects, mechanical vapour recompression (MVR) and \/ or thermal vapour recompression (TVR).<\/p>

Multiple Effect Operation :<\/strong><\/p>

The evaporation duty is separated into stages operating at different temperatures. External heat drives the first effect of the evaporator, with subsequent effects being driven by vapor generated from the previous higher temperature effect. Product may be passed through the evaporator in forward, back or mixed flow configurations. Additional efficiency is achieved with the use of regenerative heaters, condensate heaters, and vapour heaters.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Thermal Vapour Recompression, TVR :<\/strong><\/p>

Multiple effect evaporation plants save steam by repeatedly using the same quantity of heat from effect to effect. The vapours from the first effect are compressed to a higher pressure by the thermocompressor, and these compressed vapours are the heating medium for the subsequent effect. Vapours from the final effect are condensed, heat is recovered and supplemented by the cooling water if required.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Mechanical Vapour Recompression, MVR:<\/strong><\/p>

MVR technology yields the greatest energy efficiency for an evaporator and requires low cooling water. An MVR evaporator may be coupled with TVR and multiple effects.<\/p>

Evaporation plants with mechanical vapour recompressors normally require very low live steam and shifts the necessary energy to electric energy.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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MVR can be either high pressure fans or centrifugal compressor types depending on the application.Single-effect centrifugal compressors are frequently used. For high pressure increases, multi-stage compressors are provided. To supply the power to the compressor, either electric power or combustion engines are used where heat is available from the cooling water and exhaust gases. If high pressure steam is available, a steam turbine may be installed for high total energy efficiency.<\/p>

Fields of application :<\/strong><\/p>

Liquids with a high tendency for fouling, highly viscous liquids, as the high concentration step in multiple-effect eva\u00adporation plants.Forced circulation evaporators are optimally suited as crystallising evaporators for saline solutions.<\/p>

FEATURES OF COMP FORCED CIRCULATION EVAPORATORS –<\/strong><\/p>

\u2022 Suitable for a widest variety of evaporator applications.
\u2022 Ideal for crystallizing operation.
\u2022 High heat transfer coefficients.
\u2022 Positive circulation.
\u2022 Freedom from salting, scaling and fouling.
\u2022 Suitable for corrosive and viscous solutions.<\/p>

CRITICAL DESIGN FEATURES OF FORCED CIRCULATION EVAPORATORS –<\/strong><\/p>

\u2022 Optimum tube velocities
\u2022 Type of vapour head used with the forced circulation evaporators is chosen to suit the product characteristics.<\/p>

TYPICAL APPLICATIONS –<\/strong><\/p>

\u2022 Effluent Treatments Plants
\u2022 Chemical Industry
\u2022 Salt Solutions<\/p>

These shell and tube type evaporators outperform other tubular evaporators when used for water with dissolved salts or organics with a tendency to foul the evaporator tubes.<\/p>

How they work :<\/strong><\/p>

This is a tubular evaporator having heating media on the shell side and the process liquid in the tubes. It has circulation loop equipped with high flow circulation pump.<\/p>

The feed is introduced into the loop at the bottom. The high flow recirculation pump (Axial Flow Pump) forces the liquid through tubes. It picks up the heat from the shell side steam and flashes in the separator. The flashed vapour moves upward to vapour nozzle of the separator while the concentrate flows down to concentrate nozzle. The concentrate is re-circulated in the loop with high flow. A part of concentrate overflows out from the separator. The liquid height is engineered to avoid the nucleate boiling within evaporator tube bundle. The high flow circulation helps solids to remain in suspension and suppresses fouling.<\/p>

Features :<\/strong><\/p>

\u2022 Reduced scaling, ideal for materials with precipitation or crystallization tendency
\u2022 Concentration values more than the limits of conventional tubular evaporators when handling feed with dissolved salts
\u2022 Multiple effect arrangement provides steam economy
\u2022 Equipped with axial flow pumps having high capacity with minimum power<\/p>

Applications :<\/strong><\/p>

\u2022 Pre-concentration of scale prone liquids before drying
\u2022 Evaporative crystallization
\u2022 Wastewater concentration for volume reduction
\u2022 Concentration of organic and inorganic salt solutions<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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MEE Forced Circulation MEE Forced Circulation Forced Circulation Evaporators are normally used for liquids which are prone to fouling, scaling, and crystallizing or for those which are inversely soluble or while concentrating thermally de-gradable materials. Here high re-circulation rate allows high liquor velocities through the tubes which help to minimize the buildup of deposits or […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"ocean_front_end_style_editor":"no","ocean_post_layout":"full-screen","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","footnotes":""},"class_list":["post-4592","page","type-page","status-publish","hentry","entry"],"_links":{"self":[{"href":"https:\/\/paramountlimited.com\/index.php?rest_route=\/wp\/v2\/pages\/4592","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/paramountlimited.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/paramountlimited.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/paramountlimited.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/paramountlimited.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4592"}],"version-history":[{"count":5,"href":"https:\/\/paramountlimited.com\/index.php?rest_route=\/wp\/v2\/pages\/4592\/revisions"}],"predecessor-version":[{"id":5756,"href":"https:\/\/paramountlimited.com\/index.php?rest_route=\/wp\/v2\/pages\/4592\/revisions\/5756"}],"wp:attachment":[{"href":"https:\/\/paramountlimited.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}