{"id":805,"count":3,"description":"\r\n\r\n\r\n\r\nOBTER PRE\u00c7O DA V\u00c1LVULA DE AM\u00d4NIA<\/strong><\/strong><\/a>\r\n\r\n\r\n\r\n\r\n

Vis\u00e3o geral do processo de am\u00f4nia<\/h2>\r\n\r\n\r\n\r\n\r\nA s\u00edntese de am\u00f4nia \u00e9 usada para produzir am\u00f4nia a partir de nitrog\u00eanio e hidrog\u00eanio. A am\u00f4nia produzida pode ent\u00e3o ser usada como fertilizante ou pode ser posteriormente processada em ur\u00e9ia ou \u00e1cido n\u00edtrico. Uma mistura de hidrog\u00eanio e nitrog\u00eanio, geralmente proveniente de um reformador a vapor, \u00e9 admitida no circuito de s\u00edntese e ent\u00e3o comprimida em dois est\u00e1gios na press\u00e3o de s\u00edntese de 150-300 bar (2.200-4.400 psi). A corrente \u00e9 pr\u00e9-aquecida por troca de calor com o efluente quente saindo do conversor antes de entrar no conversor de am\u00f4nia.\r\n\r\n\r\n\r\n\r\n\r\nO processo de convers\u00e3o de am\u00f4nia \u00e9 um compromisso entre temperatura e press\u00e3o. Para que o catalisador seja eficiente, \u00e9 necess\u00e1ria uma temperatura de pelo menos 400 \u00b0C (750 \u00b0F),\r\n\r\n\r\n\r\n\r\n\r\nmas como a reac\u00e7\u00e3o \u00e9 exot\u00e9rmica, uma temperatura mais elevada afecta negativamente o rendimento do produto. Para combater este problema, a press\u00e3o \u00e9 aumentada para empurrar o equil\u00edbrio da rea\u00e7\u00e3o em dire\u00e7\u00e3o \u00e0 am\u00f4nia (aumentando assim o rendimento do produto). O calor \u00e9 recuperado do efluente gerando vapor e pr\u00e9-aquecendo a alimenta\u00e7\u00e3o recebida. O efluente \u00e9 ent\u00e3o enviado para refrigera\u00e7\u00e3o antes do produto ser separado do meio e o g\u00e1s que n\u00e3o reagiu \u00e9 reciclado para o in\u00edcio do ciclo de s\u00edntese.\r\n\r\n\r\n\r\n\r\n
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Tipos de v\u00e1lvulas no circuito de s\u00edntese de am\u00f4nia<\/h2>\r\n\r\n\r\n\r\n\r\nA fun\u00e7\u00e3o das v\u00e1lvulas no circuito de s\u00edntese de am\u00f4nia \u00e9 controlar o fluxo do g\u00e1s de s\u00edntese para o conversor e garantir a reciclagem do g\u00e1s de s\u00edntese que n\u00e3o reagiu.\r\n\r\n\r\n\r\n\r\n

V\u00e1lvula de entrada do conversor<\/h3>\r\n\r\n\r\n\r\n\r\nEsta v\u00e1lvula \u00e9 usada para ajustar o fluxo do g\u00e1s de s\u00edntese no conversor. O fluxo pode precisar ser ajustado para lidar com flutua\u00e7\u00f5es de temperatura no conversor.\r\n\r\n\r\n\r\n\r\n

V\u00e1lvula de sa\u00edda do conversor<\/h3>\r\n\r\n\r\n\r\n\r\nEsta v\u00e1lvula est\u00e1 localizada ap\u00f3s o reator e \u00e9 utilizada para regular o fluxo de efluente para a caldeira.\r\n\r\n\r\n\r\n\r\n

V\u00e1lvula de desvio da caldeira<\/h3>\r\n\r\n\r\n\r\n\r\nEsta v\u00e1lvula \u00e9 utilizada para controlar a vaz\u00e3o do efluente do reator que desvia da caldeira, permitindo controlar a quantidade de pr\u00e9-aquecimento do trocador de calor do g\u00e1s de s\u00edntese.\r\n\r\n\r\n\r\n\r\n

Usos e condi\u00e7\u00f5es operacionais de am\u00f4nia<\/h2>\r\n\r\n\r\n\r\n\r\nA am\u00f4nia \u00e9 um g\u00e1s incolor que consiste em nitrog\u00eanio e hidrog\u00eanio (NH3). Em condi\u00e7\u00f5es atmosf\u00e9ricas, \u00e9 mais leve que o ar e tem um odor pungente. \u00c9 um irritante altamente c\u00e1ustico, t\u00f3xico e inflam\u00e1vel. Devido ao seu baixo ponto de ebuli\u00e7\u00e3o, como l\u00edquido, deve ser armazenado sob press\u00e3o ou em baixa temperatura. A am\u00f4nia industrial \u00e9 vendida como licor de am\u00f4nia ou como am\u00f4nia l\u00edquida anidra pressurizada ou refrigerada transportada em vag\u00f5es-tanque ou cilindros. Am\u00f4nia dom\u00e9stica ou hidr\u00f3xido de am\u00f4nio \u00e9 uma solu\u00e7\u00e3o de NH3 em \u00e1gua. A maior parte da am\u00f4nia \u00e9 consumida na fabrica\u00e7\u00e3o de fertilizantes. \u00c9 tamb\u00e9m um alicerce para a s\u00edntese de muitos produtos farmac\u00eauticos e \u00e9 usado em muitos produtos de limpeza comerciais.\r\n\r\n\r\n\r\n\r\n

V\u00e1lvulas de esfera para servi\u00e7o de am\u00f4nia<\/h2>\r\n\r\n\r\n\r\n\r\nAs v\u00e1lvulas de am\u00f4nia s\u00e3o projetadas para desempenho e confiabilidade nos processos industriais mais perigosos, como aplica\u00e7\u00f5es severas de am\u00f4nia. Essas v\u00e1lvulas est\u00e3o dispon\u00edveis no tipo \u201cflutuante\u201d com duas configura\u00e7\u00f5es b\u00e1sicas de corpo \u2013 corpo dividido na porta completa e padr\u00e3o e monobloco apenas na porta padr\u00e3o.\r\n\r\n\r\n\r\n\r\n

Limpeza e teste<\/h2>\r\n\r\n\r\n\r\n\r\nTodos os componentes utilizados para servi\u00e7o com am\u00f4nia, no estado gasoso ou l\u00edquido, s\u00e3o especificamente limpos para remover quaisquer vest\u00edgios de \u00f3leo, graxa ou materiais de hidrocarbonetos antes da montagem da v\u00e1lvula. As v\u00e1lvulas para servi\u00e7o com am\u00f4nia s\u00e3o montadas em uma \u00e1rea restrita e isenta de \u00f3leo por pessoal especialmente equipado e treinado para executar esta tarefa. A \u00e1rea de montagem, trabalho, superf\u00edcies, equipamentos e ferramentas s\u00e3o mantidos especialmente para garantir que os requisitos de limpeza sejam atendidos.\r\n\r\n","link":"https:\/\/zecovalve.com\/pt\/tag\/ammonia","name":"V\u00e1lvula de amon\u00edaco","slug":"ammonia","taxonomy":"post_tag","meta":[],"yoast_head":"\nAmmonia Valve - Ammonia Motorized Valve & Ammonia Globe Valve | ZECO<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zecovalve.com\/pt\/tag\/ammonia\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ammonia Valve - Ammonia Motorized Valve & Ammonia Globe Valve | ZECO\" \/>\n<meta property=\"og:description\" content=\"GET AMMONIA VALVE PRICE Ammonia Process Overview Ammonia synthesis is used to produce ammonia from nitrogen and hydrogen. The produced ammonia can then be used as a fertilizer, or it can be further processed into urea or nitric acid. A mixture of hydrogen and nitrogen, usually originating from a steam reformer, is admitted to the synthesis loop and then compressed in two stages into the synthesis pressure of 150-300 bar (2200-4400 psi). The stream is preheated by heat exchange with the hot effluent coming out of the converter before entering the ammonia converter. The ammonia conversion process is a compromise between temperature and pressure. For the catalyst to be efficient a temperature of at least 400 \u00b0C (750 \u00b0F) is needed, but since the reaction is exothermic a higher temperature negatively affects product yield. To counter this issue, the pressure is increased to push the reaction equilibrium toward ammonia (thus increasing product yield). Heat is recovered from the effluent by generating steam and by pre-heating the incoming feed. The effluent is then sent to refrigeration before the product is separated from the medium and unreacted gas is recycled to the start of the synthesis loop. Types of Valves in Ammonia Synthesis Loop The role of valves in the ammonia synthesis loop is to control the flow of synthesis gas into the converter and to ensure the recycling of the unreacted synthesis gas. Converter inlet valve This valve is used to adjust the flow of synthesis gas into the converter. The flow may need to be adjusted to cope with temperature fluctuations in the converter. Converter outlet valve This valve is located after the reactor and is used to regulate the flow of effluent to the boiler. Boiler bypass valve This valve is used to control the flow of reactor effluent that bypasses the boiler, allowing the amount of pre-heating by the synthesis gas heat exchanger to be controlled. Ammonia Uses & Operating Conditions Ammonia is a colorless gas that consists of nitrogen and hydrogen (NH3). At atmospheric conditions, it is lighter than air with a pungent odor. It is a highly caustic irritant that is both toxic and flammable. Because of its low boiling point, as a liquid, it must be stored under pressure or at a low temperature. Industrial ammonia is sold either as ammonia liquor or as pressurized or refrigerated anhydrous liquid ammonia transported in tank cars or cylinders. Household ammonia or ammonium hydroxide is a solution of NH3 in water. Most ammonia is consumed in the manufacturing of fertilizer. It is also a building block for the synthesis of many pharmaceutical products and is used in many commercial cleaning products. Ammonia Service Ball Valves Ammonia valves are engineered for performance and reliability in the most hazardous industrial processes such as severe ammonia applications. These valves are available in a \u201cfloating\u201d type with two basic body configurations \u2013 split body in full and standard port and a unibody in standard port only. Cleaning & Testing All components used for ammonia service, in a gaseous or liquid state, are specifically cleaned to remove any traces of oil, grease, or hydrocarbon materials prior to the valve assembly. Valves for ammonia service are assembled in an oil-free restricted area by personnel who are specially equipped and trained to perform this task. The assembling area, work, surfaces, equipment, and tools are specially maintained to ensure cleanliness requirements are met.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zecovalve.com\/pt\/tag\/ammonia\" \/>\n<meta property=\"og:site_name\" content=\"ZECO Valve\" \/>\n<meta property=\"og:image\" content=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/11\/ammonia-process.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/zecovalve.com\/#website\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"ZECO Valve\",\"description\":\"Industrial Ball Valve, Gate Valve and Globe Valve Manufacturer\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/zecovalve.com\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/zecovalve.com\/tag\/ammonia#webpage\",\"url\":\"https:\/\/zecovalve.com\/tag\/ammonia\",\"name\":\"Ammonia Valve - Ammonia Motorized Valve & Ammonia Globe Valve | ZECO\",\"isPartOf\":{\"@id\":\"https:\/\/zecovalve.com\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/zecovalve.com\/tag\/ammonia#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/zecovalve.com\/tag\/ammonia\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/zecovalve.com\/tag\/ammonia#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"position\":2,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/tag\/ammonia\",\"url\":\"https:\/\/zecovalve.com\/tag\/ammonia\",\"name\":\"Ammonia Valve\"}}]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","_links":{"self":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/tags\/805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/posts?tags=805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}