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CN-224207986-U - Urea hydrolysis reactor utilizing water drainage

CN224207986UCN 224207986 UCN224207986 UCN 224207986UCN-224207986-U

Abstract

The utility model relates to the technical field of urea hydrolysis reaction devices, and discloses a urea hydrolysis reactor utilizing drainage, which comprises a urea hydrolysis reactor, wherein a drainage booster pump is arranged in a pipeline between one end of a drainage outlet valve and a pipeline mixer, the pipeline mixer is externally connected with a demineralized water inlet valve, steam passes through a unit steam inlet valve and a unit steam inlet valve, meanwhile, the demineralized water inlet valve is opened, unit steam and demineralized water form saturated steam of 0.7MPa/170 ℃ in the pipeline mixer, the saturated steam is conveyed to a hydrolyzer heating coil and a steam purging system through a steam outlet valve, the drainage pressure is raised to about 1.0MPa under the action of the drainage booster pump, and the saturated steam of 0.7MPa/170 ℃ is continuously formed in the pipeline mixer with the unit steam through the drainage inlet valve, and after the saturated steam passes through a steam outlet valve, the urea solution is heated in the hydrolyzer heating coil through a hot steam inlet valve and a hot steam inlet valve.

Inventors

  • JIN JING
  • YAN HONGMING

Assignees

  • 华电潍坊发电有限公司

Dates

Publication Date
20260508
Application Date
20250421

Claims (6)

  1. 1. The urea hydrolysis reactor utilizing the drainage comprises a urea hydrolyzer (1) and is characterized in that a drainage outlet valve (12) is arranged on the outer wall of the urea hydrolyzer (1), a unit cold section steam group (2), a pipeline mixer (3), a urea storage tank (4), a wastewater tank A (5), a wastewater tank B (6) and a nitrogen supply system (7) are arranged on the outer side of the urea hydrolyzer (1), and a drainage booster pump (13) is arranged in a pipeline between one end of the drainage outlet valve (12) and the pipeline mixer (3); A unit steam inlet valve (21) and a unit steam inlet regulating valve (22) are arranged in a pipeline between the unit cold section steam group (2) and the pipeline mixer (3), and the pipeline mixer (3) is externally connected with a demineralized water inlet valve (23).
  2. 2. A urea hydrolysis reactor utilizing drainage according to claim 1, characterized in that a pipeline installed between the outer side of the pipeline mixer (3) and the urea hydrolyzer (1) is provided with a hot steam outlet valve (31), a hot steam inlet valve (32) and a hot steam inlet valve (33), and the inner lower end of the urea hydrolyzer (1) is provided with a hydrolyzer heating coil (11).
  3. 3. The urea hydrolysis reactor utilizing the drainage according to claim 2, wherein a gas phase pressure relief pipe (15) is arranged on the outer side of the urea hydrolysis reactor (1), one end of the gas phase pressure relief pipe (15) is positioned above the wastewater tank A (5), and a gas phase pressure relief valve (151) is arranged at the middle end of the gas phase pressure relief pipe (15).
  4. 4. A hydrolysis reactor for urea by utilizing hydrophobic water according to claim 3, wherein a product gas outlet pipe (16) and a liquid phase reflux pipe (17) are arranged on the outer side of the urea hydrolyzer (1), one end of the product gas outlet pipe (16) is arranged in the nitrogen supply system (7), a product gas outlet regulating valve (161) and a product gas outlet shutoff valve (162) are arranged at the middle end of the product gas outlet pipe (16), one end of the liquid phase reflux pipe (17) is arranged on the urea storage tank (4), and a liquid phase reflux valve (171) and a liquid phase reflux regulating valve (172) are arranged at the middle end of the liquid phase reflux pipe (17).
  5. 5. A urea hydrolysis reactor utilizing water drainage according to claim 4, characterized in that the pipelines arranged outside the pipeline mixer (3) are respectively connected with a gas phase pressure relief pipe (15), a product gas outlet pipe (16), a liquid phase return pipe (17) and a sewage draining pipe (18).
  6. 6. A hydrolysis reactor for urea by utilizing hydrophobic water according to claim 5, wherein a surface blow-down valve (181) and a liquid phase blow-down valve (182) are installed at the middle end of the blow-down pipe (18) and near one end installed at the urea hydrolyzer (1), and a blow-down control valve (183) is installed at the middle part of one end of the blow-down pipe (18) near the wastewater tank B (6).

Description

Urea hydrolysis reactor utilizing water drainage Technical Field The utility model relates to the technical field of urea hydrolysis reaction devices, in particular to a urea hydrolysis reactor utilizing hydrophobic water. Background The urea hydrolysis system is a system for decomposing urea (the main component of which is urea, the chemical formula of which is CO (NH 2)2) into ammonia (NH 3) and carbon dioxide (CO 2). The system is widely used in a variety of fields, particularly in industry, environmental protection, chemical engineering, and the like. The urea hydrolysis reactor utilizing the drainage comprises a reactor shell, wherein one end of the inner side of the reactor shell is divided into a tube box cylinder body and a heating zone by a flange, the heating zone is divided into a heating zone and a preheating zone, the tube box cylinder body is communicated with the preheating zone through a steam drainage pipeline, a gas phase space is arranged above the heating zone of the reactor shell, a liquid phase space is arranged below the heating zone of the reactor shell, the liquid phase space is divided into the heating zone and the preheating zone by a partition plate, and a heating coil is arranged in the heating zone of the reactor shell, connected with the flange and communicated with the tube box cylinder body. Through setting up steam drainage pipeline, not only can utilize steam drainage heating urea solution, reduce steam consumption, improve steam utilization, save energy and cost, the system is simple moreover, and processing is convenient, convenient maintenance. According to the patent, the urea solution can be heated by utilizing steam drainage through the steam drainage pipeline, so that the steam consumption is reduced, and the steam utilization is improved, however, in actual use, substances generated by urea hydrolysis are not cleaned up the reactor after the reaction, so that the substances are easily accumulated in the reactor, the follow-up hydrolysis reaction is affected, and the use is inconvenient. Disclosure of utility model The utility model aims to provide a urea hydrolysis reactor utilizing hydrophobic water, so as to solve the problem that substances generated by urea hydrolysis are easy to accumulate in the reactor because the reactor is not cleaned after the reaction in the prior art. The utility model provides a technical scheme that the urea hydrolysis reactor utilizing drainage comprises a urea hydrolyzer, wherein a drainage outlet valve is arranged on the outer wall of the urea hydrolyzer, a unit cold section steam group, a pipeline mixer, a urea storage tank, a wastewater tank A, a wastewater tank B and a nitrogen supply system are arranged on the outer side of the urea hydrolyzer, and a drainage booster pump is arranged in a pipeline between one end of the drainage outlet valve and the pipeline mixer; And a unit steam inlet valve and a unit steam inlet regulating valve are arranged in a pipeline between the unit cold section steam group and a pipeline mixer, and the pipeline mixer is externally connected with a demineralized water inlet valve. Preferably, a hot steam outlet valve, a hot steam inlet valve and a hot steam inlet regulating valve are arranged on a pipeline arranged between the outer side of the pipeline mixer and the urea hydrolyzer, and a hydrolyzer heating coil is arranged at the lower end of the inner part of the urea hydrolyzer. Preferably, a gas phase pressure relief pipe is arranged on the outer side of the urea hydrolyzer, one end of the gas phase pressure relief pipe is positioned above the wastewater pool A, and a gas phase pressure relief valve is arranged at the middle end of the gas phase pressure relief pipe. Preferably, a product gas outlet pipe and a liquid phase reflux pipe are arranged on the outer side of the urea hydrolyzer, one end of the product gas outlet pipe is arranged in the nitrogen supply system, a product gas outlet regulating valve and a product gas outlet shutoff valve are arranged at the middle end of the product gas outlet pipe, one end of the liquid phase reflux pipe is arranged on the urea storage tank, and a liquid phase reflux valve and a liquid phase reflux regulating valve are arranged at the middle end of the liquid phase reflux pipe. Preferably, the pipeline arranged outside the pipeline mixer is connected with the gas phase pressure relief pipe, the product gas outlet pipe, the liquid phase return pipe and the sewage discharge pipe respectively. Preferably, the middle end of the drain pipe is provided with a surface drain valve and a liquid phase drain valve close to one end of the urea hydrolyzer, and the middle part of one end of the drain pipe close to the wastewater tank B is provided with a drain control valve. Compared with the prior art, the utility model has the beneficial effects that: 1. According to the urea hydrolysis reactor utilizing the drainage, the drainage generated in the hydrolyzer is gasif