RU121527U1 - MODULAR TURBOCHARGER UNIT FOR SUPPLY OF COMPRESSED AIR TO THE TECHNOLOGICAL PROCESS OF PRODUCTION OF NITRIC ACID - Google Patents

Abstract

A turbocompressor unit for supplying compressed air to a nitric acid production process, containing an air compressor driven by a gas turbine, characterized in that a single-stage centrifugal air compressor driven by a two-stage axial gas turbine is used as an air compressor, the turbocompressor unit is divided into modules , which are interconnected by intermodular detachable connections, and represent an input device module, an air compressor module, a support module, a turbine module, an output device module, while the input device module includes a housing, an air intake, an adjustable two-support inlet guide vanes; the air compressor module includes an axial wheel and a centrifugal wheel, which are fixed by means of a trunnion on the shaft of the support module; the support module includes a rotor shaft with bearing supports, a blade diffuser, an outer casing, power conical casings and a gas collector; the turbine module includes two turbine stages and a housing; the exhaust gas outlet module includes two conical shells that go into the exhaust gas collection box.

Description

The utility model relates to mechanical engineering, to units that are part of plants for the production of nitric acid, namely, turbocompressor plants designed to supply compressed air to the technological process for the production of nitric acid.

Industrial production of nitric acid is carried out by the catalytic oxidation of ammonia by atmospheric oxygen, followed by absorption of nitrogen oxides by water (US patent 4042339, publ. 08.16.1977; patent GB 1367724, publ. 09.25.1974); "Production of nitric acid in units of large unit capacity." / Edited by Olevsky V.M., M., “Chemistry”, 1985. pp. 94-306).

Known turbocompressor installation, designed to supply compressed air to the technological process for the production of nitric acid, having two stages of air compression (application DE 102005023161, publ. 23.11.2003,). At least two compression stages are provided in the installation of US Pat. No. 4,042,339, publ. 08/16/1977. The disadvantages of such installations is the presence of more than one compression stage.

Known turbocharger installation (prototype), designed to supply compressed air to the technological process for the production of nitric acid, which contains an air compressor for compressing atmospheric air. The drive includes a gas turbine for recovering the energy of compressed tail gases. ("Production of nitric acid in units of large unit capacity." / Edited by Olevsky VM, M., Chemistry, 1985, p. 154.)

The disadvantages of the known installation are increased power consumption and long assembly and repair times.

The technical result of the inventive turbocompressor installation for supplying compressed air to the technological process for the production of nitric acid is to create an energy-efficient installation, reducing the time of its assembly and increasing its maintainability.

The technical result in the inventive turbocompressor installation for supplying compressed air to the technological process for the production of nitric acid containing an air compressor driven by a gas turbine is achieved by the fact that a single-stage centrifugal air compressor driven by a two-stage axial turbine is used as an air compressor, a turbocompressor installation divided into modules that are interconnected by intermodular plug-in connections, and are an input device module, an air compressor module, a support module, a turbine module, an output device module, wherein the input device module includes a housing, an air intake, an adjustable two-support input guide apparatus; the air compressor module includes an axial wheel and a centrifugal wheel, which are fixed with a pin on the shaft of the support module; the support module includes a rotor shaft with bearing bearings, a diffuser blade, an outer casing, power conical housings and a gas collector; a turbine module includes two stages of a turbine and a housing; The module of the exhaust gas exhaust device includes two conical shells that pass into the box for collecting exhaust gases.

As a result of the patent information search carried out by the applicant, it was established that the claimed solution contains well-known features. For example, from the description of patent GB 360778, publ. 12/12/1931, it is known to use a centrifugal turbocompressor in installations for the industrial production of nitric acid. However, the design of the installation is not presented. From the description of the patent of the Russian Federation No. 2372504, publ. November 10, 2009, the modular design of a multi-purpose gas turbine power plant is known, which contains functional modules of a compressed air generator and a turbogenerator, and it is possible to separate module 1 from module 2 by a quick disconnect joint. However, this known installation is not intended to supply compressed air to the nitric acid production process.

As a result of the patent information search carried out by the applicant, no information sources were found containing the totality of the claimed features, including the totality of the distinguishing features.

The essence of the utility model and the possibility of its industrial application is illustrated by an example of a specific implementation, which is illustrated in figures 1-6, where the section shows:

figure 1 - turbocharger installation,

figure 2 - module input device

figure 3 - module of the air compressor,

figure 4 - module supports

figure 5 - turbine module,

figure 6 - module output device.

As shown in figure 1, the components of a turbocharger installation are combined in modules. Module 1 is an input device module. Module 2 - air compressor module. Module 3 - module supports. Module 4 - turbine module. Module 5 - module output device. In this case, the intermodular connections are made detachable.

The input device module 1 (FIG. 2) includes an air intake 7, an adjustable two-support input guide apparatus 8 and a housing 9.

The air compressor module 2 (FIG. 3) includes an axial wheel 10 and a centrifugal wheel 11, which are made according to the “blisk” type and bolted to a flange of an axle mounted on the shaft of the support module (not shown in FIG.).

The support module 3 (FIG. 4) includes a rotor shaft 12 with front 13 and rear 14 bearings, a blade diffuser 15, an outer casing 16, power cone cases (not shown in FIG.) And a gas collector 17. The support module 3 is sequentially mounted all other modules. Plain bearings are attached to the housings. A shaft is installed in the bearings, on which the air compressor and turbine modules are installed. The front support is designed as an angular contact plain bearing. The front support accepts axial and radial loads coming from the rotor side. The rear support is designed as a radial plain bearing

The turbine module 4 (FIG. 5) includes two stages of the turbine 18 and the housing 19. The impellers of the turbine are attached to the shaft using coupling bolts (not shown in FIG.).

The module 5 of the output device (Fig.6) is designed for exhaust gas and includes two shells 20, passing into the box for collecting exhaust gases (Fig. Not shown).

Turbocharger installation operates as follows. The input device provides the intake of ambient air and its supply to the flowing part of the air compressor. For pneumatic start of the turbocompressor unit, compressed air is supplied to the turbine blades. The resulting torque makes it possible to untwist the rotor of the turbocompressor unit until the ignition speed of the combustion chamber. A further increase in speed is accompanied by an increase in the consumption of natural gas and air supply through the nozzles to the turbine path. The source of compressed air can be either an autonomous compressor or a factory pneumatic system. If it is not possible to use compressed air, it is possible to use steam from a factory steam line. The air compressor is driven by a recovery gas turbine, in which the exhaust tail gases heated to a high temperature expand after the absorption stage, and heating is carried out by burning fuel, mainly natural gas, in the turbine combustion chamber by mixing the tail gases with flue gases from the turbine combustion chamber. The output device provides exhaust gas exhaust.

Due to the fact that a high-pressure single-stage centrifugal air compressor, driven by a two-stage axial turbine, is used, the installation's energy efficiency is increased.

Due to the fact that the turbocompressor installation is divided into modules that are interconnected by intermodular plug-in connections, it is possible to reduce the assembly time of the turbocompressor installation. A turbocharger installation is assembled from only 5 assembly units - modules. Installation operations are carried out in the horizontal position of the axis of the turbocompressor installation without dismantling it from the frame.

The inventive modular design also allows you to increase maintainability, due to the reduction of time for repair of components and parts. To repair any module, it is enough to dismantle it and carry out repair work only with the faulty module, without disassembling the turbocompressor unit in whole or in part, without dismantling it from the frame. Interchangeable modules can be manufactured. A faulty module can be repaired within the planned time and prepared for installation on a turbocharger installation.

Thus, thanks to the claimed design, a new technical result has been achieved: the plant’s energy efficiency has been increased, it has been possible to reduce the assembly and repair time of a turbocompressor installation for supplying compressed air to the nitric acid production process.

Claims (1)

A turbocharger installation for supplying compressed air to a nitric acid production process containing an air compressor driven by a gas turbine, characterized in that a single-stage centrifugal air compressor driven by a two-stage axial gas turbine is used as an air compressor, the turbocompressor installation is divided into modules which are interconnected by intermodular plug-in connections, and represent an input device module a, an air compressor module, a support module, a turbine module, an output device module, wherein the input device module includes a housing, an air intake, an adjustable two-bearing input guide apparatus; the air compressor module includes an axial wheel and a centrifugal wheel, which are fixed with a pin on the shaft of the support module; the support module includes a rotor shaft with bearing bearings, a diffuser blade, an outer casing, power conical housings and a gas collector; a turbine module includes two stages of a turbine and a housing; The module of the exhaust gas exhaust device includes two conical shells that pass into the box for collecting exhaust gases.