RU2200912C2 - Gas-fired water-heating boiler - Google Patents

Abstract

FIELD: water heating equipment, possibly heating and hot water supply systems. SUBSTANCE: boiler includes casing, fire box, heat exchanger, gas receptacle, gas pipeline, system for automatic control, for safety and for manual control. Working burners are made of steel, they have slit-like grooves arranged in pairs by three rows in staggered fashion and distributed along width of fire box in such a way that their housings form distribution grate. Areas of slits of said grate may provide uniform temperature field in the whole volume of fire box. Ignition burner is mounted with inclination angle under working burners and it has fire bridge extended by 1/3 of fire surface of working burners at side of their nozzles. Modules of heat exchanger are made of cast iron with circular heating surface and they are mutually joined in such a way that their lateral ribs define gas ducts. Lateral walls of each module are mutually joined by means of rods. Flue pipe is provided with controlled draft stabilizer. System for automatic control and safety includes pneumatic pickup for detecting flame in ignition burner, electric and pneumatic draft pickups, electric and pneumatic pickups for detecting flame going onto cut of nozzles of working burners; main and additional shutoff valves operating at clogging up gas duct inside boiler; water temperature regulator and handle "start" (said valves, temperature regulator and handle form united control device together with control and safety pickups); temperature control unit designed for monitoring preset air temperature in heated room and connected with electromagnetic valve, electric motor of circulation pump of heating system and with exhaust fan; cock for manual control of boiler operation according to temperature of heat transfer agent; safety valve operating according to pressure of heat transfer agent at air reducing from heating system being filled. Electromagnetic valve is mounted on pulse tube connecting temperature regulator with main shutoff valve and it is bypassed with line parallel relative to cock for manual control of boiler operation according to temperature of heat transfer agent. EFFECT: enhanced operational effectiveness and reliability of boiler. 2 cl, 6 dwg

Description

 The invention relates to the field of industrial and municipal heating systems and can be used for thermostating of working fluids used in technological processes, heating and hot water supply of buildings and structures.

 From analogues of the prior art, the invention is known as an “Automatic gas water heater”, consisting of a main and pilot burner, a shutoff valve of the main burner, a heat exchanger, a room temperature sensor, automatic control and safety, including sensors for water temperature and the presence of a flame on the pilot burner, traction and an electromagnet, connected to the gas supply valve. Between the shut-off valve of the main burner and the safety and control automation valve, a radiator thermostat control valve is installed, which is connected to the room temperature sensor through the control system, and the electromagnet is powered by a flame detector (RU 2116582, MKI 6 F 24 N 9/20, application for invention 94008419/06 of 03/11/94, author Fundator Yuri Vladimirovich, published 07/27/98 Bulletin 21).

 The disadvantage of this device is the low reliability of the low-current low-voltage actuator, due to increased requirements for environmental humidity.

 Of the analogues of the prior art, the closest to the invention in terms of essential features - the prototype can be adopted the invention of a "gas water heater and a method of regulating the temperature of its coolant", containing a box casing, inside which there is a furnace, supply and return pipelines of the coolant, a gas pipeline with valves and control valves, the heating unit, which is a heat exchanger, gas manifold, pilot and burners, smoke collector, chimney and equipped automatic control and safety system and temperature control system, including a temperature sensor (RU 2094708, F 24 Н 1/12, application 9510436/06 of 02.28.95, applicants Revin Anatoly Ivanovich, Adinskov Boris Pavlovich, published on 10.27.97 ., Bulletin 30).

 In the invention adopted as a prototype, the heating unit is made in the form of a set of identical units of a honeycomb arrangement, each of which has its own heat exchanger, a combustion chamber and a gas burner.

 A disadvantage of the known invention is the low efficiency of the gas water heating boiler due to the insufficient accuracy of regulation of thermal processes, the large number and complexity of the actuating elements, lower technical and technological capabilities, insufficient reliability compared with the claimed invention.

 The technical result of the claimed invention: increased efficiency and reliability and better technical and technological capabilities compared with the invention adopted as a prototype, a gas boiler, water heating, containing a box casing, inside which there is a furnace, supply and return pipes of the coolant, a gas pipeline with valves and control valves, a heating unit, which is a heat exchanger, a gas manifold, an ignition and a working burner, a smoke collector, a chimney and It is achieved by the fact that the boiler furnace contains work burners evenly spaced along the width of the furnace, made of heat-resistant stainless steel with slotted grooves arranged in pairs in three rows in a checkerboard pattern in this way that create a uniformly distributed temperature field over the volume of the furnace, and with their bodies form a distribution grid, the area of the slots of which is made possible the passage of the required volume of secondary air to obtain the optimal ratio of the gas-air mixture during self-regulation of the secondary air flow rate through the grate by means of an adjustable draft stabilizer mounted on a chimney with a regulator made in the form of a collar with the possibility of its movement in the axial direction and thus regulating the area of the annular gap between it and the cone of the stabilizer traction stabilizer and, consequently, the rate of flow of flue gases, and the above-mentioned fuse The burner is installed obliquely from below the working burners with a fire bridge spaced 1/3 of the length of the working surface of the working burners on the nozzle side, while the heat exchanger is made of cast-iron modules with a needle-shaped heating surface, interconnected by conical nipples so that the modules have their side ribs they form gas ducts, and in each module, the side walls are interconnected by rods, while the control and safety system is equipped with a manual control system, and these systems include there are duplicate electric and pneumatic sensors, namely, the flame detector on the ignition burner, removed by means of the rod element from the high temperature zone, the draft sensor, the flame penetration sensor to the nozzle exit of the working burners or when the convective gas duct inside the boiler is clogged, as well as the said control valves and the main shut-off valve installed on the nozzle of the gas collector of the working burners in front of the gas valve, the shut-off valve and the water temperature regulator installed in a single unit, blocked by the “Start” handle and together forming a control unit with the aforementioned control and safety sensors, a thermostat that monitors the set air temperature in the heated room, which is connected through the control system to the solenoid valve and the circulation pump electric motor and smoke exhaust, and a gas discharge pipe from under the large membrane a main shutoff valve, said electromagnetic valve being mounted on a pulse tube connecting a water temperature controller and a main shutoff valve spruce, and circled in a parallel line with a manual valve to control the operation of the boiler according to the temperature of the coolant, a safety valve for pressure of the coolant and bleed air from the heating system when it is filled, mounted on the heat exchanger, and the casing of the heater is made with heat insulation, and the inner surface of the furnace is made with fireproof insulation .

 The technical result of the claimed invention is energy saving, fuel saving is achieved in that the boiler furnace contains work burners evenly spaced across the width, arranged in such a way that they form a distribution grid with their bodies, the gap area of which creates the optimal ratio of the air-gas mixture at a steady flow rate of secondary air through it, and forms a temperature field evenly distributed over the entire fire surface of the furnace, while on the surfaces of the heat exchanger no local overheating zones are created and the destruction of modules is excluded, the heat exchanger is made of cast-iron modules with a developed needle convective heating surface, and the modules are interconnected in such a way that their side ribs form gas ducts open towards the smoke collector, the outlet end of which ends with a chimney, equipped with an adjustable traction stabilizer made in the form of a collar with the possibility of its movement along the longitudinal axis of the mentioned pipe in order to regulate show mercy annular gap between the conical surfaces forming the thrust collar and confuser stabilizer, thus providing the possibility of changing the expiration of the flue gas flow rate and, as a consequence, ensuring optimum ratio of air-gas mixture, its complete combustion with optimum temperature.

 Moreover, the technical result - improving the reliability of operation - is achieved by the fact that the working burners are made of heat-resistant stainless steel with slotted grooves arranged in pairs in three rows in a checkerboard pattern, the small slit width of which eliminates the breakthrough of the flame into the mixer of the main burner; the ignition burner is installed obliquely, from below the working burners, creating a stable fire bridge with 1/3 extension of the working surface of the working burners from the nozzle side and thus removed from the zone of exposure to high temperatures; in addition, the design of the modules provides for the connection of the side walls to each other with internal rods that provide the necessary structural strength; in order to increase reliability, the automatic control and safety system contains functionally duplicating electric and pneumatic sensors.

 At the same time, the technical result: the expansion of the technological capabilities of a gas water heating boiler is achieved by the fact that it can be used both in open and closed heating systems equipped with a membrane expansion tank, and in heating systems with both gravitational and forced circulation of the coolant.

 The regulation and safety system of the claimed invention of a “gas-fired boiler” ensures its operation both using an external power source and in stand-alone mode, and allows the boiler to operate in several modes with high precision regulation — this is a stepless mode to ensure the required temperature in any particular according to the testimony of a sensor installed there, operation in the mode of maintaining a certain temperature for a certain period of time with Using the timer unit "day-night" and calendar, maintain the regime to a certain extent its own coolant temperature. In order to ensure the temperature control of the working fluid, the claimed invention "gas-fired boiler" provides for operation in the mode of maintaining the temperature of the working fluid.

 The claimed invention "Gas-fired boiler" is illustrated by drawings.

 Figure 1. General view of the gas-fired boiler.

 Figure 2. The cross-section through the pilot burner of a gas-fired boiler.

 FIG. 3. Schematic diagram of the principle electric boiler with a boiler.

 Figure 4. Gas circuit diagram of a water boiler with automatic regulation and safety and temperature control.

 Figure 5. Diagram of a heating system and hot water supply associated with a gas-fired boiler.

 6. Connection diagram of heat exchanger modules.

 The gas water heating boiler contains a box-shaped metal casing 1 (Fig. 1, 6), inside of which there is a furnace 2 (Fig. 1, 6), supplying 3 (Fig. 5, 6) and return 4 (Fig. 5, 6) coolant pipelines , a gas pipeline 5 (Fig. 1, 4) with valves and control valves, a heating unit, which is a heat exchanger 6 (Fig. 1, 6), a gas manifold 7 (Fig. 1, 2, 4), an igniter 8 (Fig. 1 , 2, 4) and working 9 (Fig. 1, 2, 4, 6) burners, a smoke collector 10 (Fig. 1, 6), a chimney 11 (Fig. 1, 4, 6). Executive mechanisms provide the process of regulating the operating modes of the gas water boiler, and the gas manifold 7 (Figs. 1, 2, 4) with valves and control valves provides gas supply, due to the combustion of which the heat carrier is heated. The casing of the water heater is made with thermal insulation, and the inner surface of the furnace 2 (1, 6) is made with fireproof insulation. The furnace 2 (Figs. 1, 6) contains working burners 9 evenly spaced along its width (Figs. 1, 2, 4, 6), arranged so that with their bodies they form a distribution grid, the area of the slots 12 (Figs. 6) which is made with the possibility of forming the optimal ratio of the gas-air mixture at a given speed of the secondary air flow through the grate and creating a uniform temperature field throughout the volume of the furnace 2 (1, 6), and the working burners are made of heat-resistant stainless steel with slotted grooves, located bubbled in pairs in three rows in a checkerboard pattern. Ignition burner 8 (Figs. 1, 2, 4) is installed obliquely from below the working burners 9 (Figs. 1, 2, 4, 6) with a fire bridge spaced out 1/3 of the length of the fire surface of the burners 9 (Figs. 1, 2 , 4, 6) from the nozzle side.

 The gas water heating boiler is equipped with a temperature control system 13 (Fig. 1), including a temperature sensor 14 (Fig. 1). The pilot burner 8 (Figs. 1, 2, 4) is fixed to the base 15 (Fig. 2) and is equipped with a bimetallic plate 16 (Fig. 2), which is a sensitive element.

 In this case, the heat exchanger 6 (Fig. 1, 6) is made of cast-iron modules 17 (Fig.6) with a needle-shaped heating surface 18 (Fig.6), interconnected by conical nipples 19 (Fig. 6) so that the modules 17 ( 6) their side ribs form convective flues 20 (6), and the side walls 21 (6) of each module 17 (6) are interconnected by rods 22 (6), and the mentioned chimney 11 (figure 1, 4, 6) is equipped with an adjustable traction stabilizer 23 (figure 1, 6), made in the form of a collar, with the possibility of its movement in the axial direction and adjust thus, the area of the annular gap 24 (Fig.6) between it and the cone of the confuser of the stabilizer rod 23 (Fig.1, 6) and the regulation of the rate of flow of flue gases.

The gas control and safety automatics system includes a pneumatic sensor 25 (Fig. 2, 4) for the presence of a flame on the ignition burner 8 (Fig. 1, 2, 4), removed by a rod element 26 (Fig. 2) from the elevated temperature zone, a draft sensor 27 (FIGS. 1, 4), flame penetration sensor 28 (FIGS. 1, 4) to the nozzle section of the working burners 9 (FIGS. 1, 2, 4, 6) or when the convection duct 20 is clogged (FIG. 6) inside the boiler . The control and safety system includes a main shut-off valve 29 (Figs. 1, 4) installed on the pipe of the gas manifold 7 (Figs. 1, 2, 4, 6) of the working burners 9 (Figs. 1, 2, 4, 6) before a gas valve 30 (Figs. 1, 4), a shut-off valve 31 (Figs. 1, 4) and a water temperature regulator 32 (Figs. 1, 4) installed in a single block and interlocked by the Start handle 33 (Fig. 1) ) and together forming a control unit with the aforementioned control and safety sensors, a thermostat 34 (Figs. 1, 3) that monitors the set air temperature in a heated room, which through the system board connected with an electromagnetic valve 35 (Fig. 1, 3, 4) and an electric motor of the circulation pump 36 (Fig. 3, 5) of the heating system and a smoke exhauster 37 (Fig. 1, 3), a gas discharge pipe 38 (Fig. 1, 4 ) from under the large membrane of the main valve-shutoff 29 (Fig.1, 4). Moreover, the said electromagnetic valve 35 (Figs. 1, 3, 4) is mounted on a pulse tube connecting the water temperature controller 32 (Figs. 1, 4) and the main shut-off valve 29 (Figs. 1, 4) and is circled in a parallel line with the gas manual control valve 39 (figures 1, 4) operation of the boiler according to the temperature of the coolant. In this case, the electromagnetic valve 35 (Fig. 1, 3, 4) is configured to be connected to the control system of the boiler 40 (Fig. 3, 5) for hot water supply, as well as control from the thermostat 34 (Fig. 1, 3) or control from program block in the "Day-night" mode (not shown in the drawing), with the mode being repeated for a week and a month. In addition, the control and safety system is equipped with a safety valve 41 (Fig. 1, 5) for pressure of the coolant and for bleeding air from the heating system when it is filled, mounted on the heat exchanger 6 (Fig. 1, 6). In the "Day" mode, the room temperature is maintained + 20-22 ^o С, and in the "Night" mode the temperature is maintained + 15-17 ^o С.

 The regulation and safety system 42 (Fig. 4) includes duplicate pneumatic sensors: a flame detector 25 (Figs. 2, 4) on the pilot burner (Figs. 1, 2, 4), a draft sensor 27 (Figs. 1, 4), the flame penetration sensor 28 (Fig. 1, 4) to the nozzle section of the working burners 9 (Fig. 1, 2, 4, 6). The water temperature controller 32 (Fig. 1, 4) installed in the water jacket 43 (Fig. 4) of the boiler, the electromagnetic valve 35 (Fig. 1, 3, 4) and the main shut-off valve 29 (Fig. 1, 4) form automatic control line for the operation of the working burners 9 (Figs. 1, 2, 4, 6) according to the temperature of the air in the heated room and the temperature of the coolant with the manual gas valve 39 open (Figs. 1, 4). A gas water heating boiler can operate in a heating system and hot water supply, which contains a circulation pump 36 (Fig. 3, 5) of a heating system, a boiler 40 (Fig. 3, 5), a pressure relief valve for the pressure of the heating medium 41 (Fig. 1, 5) and also contains: mixer 44 (Fig. 5), expansion tank 45 (Fig. 5), safety valve 46 (Fig. 6), boiler 40 (Fig. 3, 5), valve 47 (Fig. 5) of water supply into the boiler, the circulation pump 48 (Fig. 5) of the boiler, the radiator 49 (Fig. 5), anti-scale electromagnetic device 50 (Fig. 5), the valve 51 (Fig. 5) of the filling system water heating, membrane expansion tank 53 (Fig. 5), a valve for closing the circulation of water in the heating system 54 (Fig. 5), valve 55 (Fig. 5), sludge discharge from the heating system and a sludge collector 56 (Fig. 5), valve 57 (Fig. 5) draining the water from the heating system and the sink 58 (Fig. 5).

 The electric circuit diagram of a gas water heating boiler with a boiler 40 (Figs. 3, 5) contains: a thermostat 34 (Figs. 1, 3) and electric sensors included in the control and safety system: draft sensor 59 (Fig. 3), an electric flame-through sensor 60 (FIG. 3), the master is a water temperature switch in the boiler 61 (FIG. 3), the relay sensor is a coolant temperature 62 (FIG. 3). The electrical system also contains a power box 63 (FIG. 3) and a switch 64 (FIG. 3), a terminal block 65 (FIG. 3), an electromagnetic relay 66 (FIG. 3) with contacts 67 (FIG. 3) and 68 (FIG. .3) and an electromagnetic relay 69 (Fig. 3). The electrical system also includes the solenoid valve 35 (Figs. 1, 3, 4), the circulation pump 36 (Figs. 3, 5) of the heating system and the circulating pump 48 (Figs. 3, 5) of the boiler 40 (Figs. 3, 5) . In this case, the sensor - temperature switch 61 (Fig. 3) includes a relay 69 (Fig. 3) having contacts 70 (Fig. 3) and 71 (Fig. 3) for activating the solenoid valve 35 (Fig. 1, 3, 4, respectively) ) and the circulation pump 48 (Fig.3, 5) of the boiler 40 (Fig.3, 5). In addition, the circuit contains switches 72 (FIG. 3) and 73 (FIG. 3), a transformer 74 (FIG. 3) 220/24 V, a switch 75 (FIG. 3) and a rectifier pole 76 (FIG. 3).

The claimed invention is a gas water heating boiler operates as follows:
In the initial state, gas does not enter the gas-fired boiler, the draft sensor 27 (Figs. 1, 4) is closed, the flame detector 25 (Figs. 2, 4) is open, the flame-through sensor 28 (Figs. 1, 4) is closed, gas taps 30 (Figs. 1, 4), 39 (Figs. 1, 4) are closed, shut-off valve 31 (Figs. 1, 4) are closed, the main shut-off valve 29 (Figs. 1, 4) on manifold 7 (Figs. .1, 2, 4, 6) of the working burners 9 (Figs. 1, 2, 4, 6) is closed, the valve of the temperature controller 32 (Figs. 1, 4) is closed, the control circuit is de-energized, the contacts of the thermostat 34 (Fig. 1, 3) open, contact 67 (Fig.3) control ele by solenoid valves 35 (FIGS. 1, 3, 4), smoke exhauster 37 (FIG. 3), the circulation pump of the heating system 68 (FIG. 3) on the electromagnetic relay 69 (FIG. 3) are open, control contacts 70 (FIG. 3) solenoid valve 35 (Fig. 1, 3, 4), exhaust fan 37 (Fig. 3), control of the circulation pump of the boiler 71 (Fig. 3) on the electromagnetic relay 69 (Fig. 3) are open, the switch 72 (Fig. 3) connect boiler 40 (FIGS. 3, 5) is open, switch 73 (FIG. 3) forcing the circulation pump of the heating system is open, the switch 75 (Fig. 3), the operation of the electromagnetic valve are open, the contacts 59 (Fig. 3), 60 (Fig. 3), 62 (Fig. 3), respectively, of the draft sensors, flamethrough to the nozzle exit of the main burners, the coolant temperature is closed.

The operation of the gas water heating boiler in stand-alone mode without power supply is as follows:
When you turn the knob 33 (Fig. 1) to the "Start" position, the gas enters the pilot burner 8 (Figs. 1, 2, 4), where the gas-air mixture is ignited. When heated by the flame of the pilot burner 8 (Fig. 1, 2, 4) of the bimetallic plate 16 (Fig. 2), the latter, deforming, presses through the rod 26 (Fig. 2) onto the valve ball of the flame detector 25 (Fig. 2, 4) and seals the pulsed gas system, the gas system is ready for further work. When you release the handle 33 (figure 1), the gas-air mixture on the ignition burner burns. With the open gas valve 39 (Fig. 1, 4) on the pulse system and the open gas valve 30 (Fig. 1, 4) on the gas manifold 7 (Fig. 1, 2, 4, 6) of the working burner 9 (Fig. 1, 2, 4, 6) set the handle 33 (figure 1) on the temperature controller of the coolant 32 (figures 1, 4) the desired temperature. The valve of the coolant temperature controller opens and gas enters under the membrane of the main shutoff valve 29 (Fig. 1, 4), which opens and passes gas from the gas pipeline 5 (Fig. 1, 4) into the manifold 7 (Fig. 1, 2, 4, 6) the working burner, goes through the nozzle into the mixer of the working burner 9 (Fig. 1, 2, 4, 6), mixes with the intake primary air, leaves through the slots on the firing surface, mixes with the secondary air and the resulting gas-air mixture is ignited from the ignition flame burners 8 (figures 1, 2, 4). When the set temperature of the coolant is reached, the valve of the water temperature controller 32 (Fig. 1, 4) closes, the pressure from under the membrane of the main shut-off valve 29 (Fig. 1, 4) is vented through the gas discharge pipe 38 (Fig. 1, 4), the main shut-off valve 29 (Figs. 1, 4) closes, the flame on the working burners 9 (Figs. 1, 2, 4, 6) goes out. When the coolant cools, the valve on the temperature controller 32 of the coolant (Figs. 1, 4) opens and work proceeds according to the above scheme.

The operation of a gas water heating boiler by air temperature in a heated room is as follows:
Gas and electric systems in the starting position. We carry out the work on starting the water heating boiler, indicated above, before igniting the ignition burner, set the maximum temperature on RTV 32 (Figs. 1, 4) +95 ^o С, apply power, set the thermostat on thermostat 34 (Figs. 1, 3), open the gas valve 30 (Fig.1, 4). When setting the temperature on the thermostat 34 (Fig. 1, 3), the electric circuit closes, on the relay 66 (Fig. 3), the contacts 67 (Fig. 3) and 68 (Fig. 3) are closed, which close the electrical circuits of the electrovalve 35 (Fig. 1 , 3, 4), a smoke exhauster 37 (Fig. 3) and a circulation pump 36 (Figs. 3, 5) of the heating system. The electrovalve 35 (Figs. 1, 3, 4) opens and gas flows through a pulse tube under the membrane of the main shutoff valve 29 (Figs. 1, 4), which opens and passes gas to the working burners 9 (Figs. 1, 2, 4 , 6), where it is ignited from the pilot burner 8 (Figs. 1, 2, 4), when the temperature in the heated room is equal to the set value, the contacts of the thermostat 34 (Figs. 1, 3) open, the relay 66 is de-energized (Fig. 3) , the circulation pump 36 (Fig. 3, 5) and the electromagnetic valve 35 (Figs. 1, 3, 4) are turned off, the flame on the working burners 9 (Figs. 1, 2, 4, 6) goes out.

The operation of the gas water heating boiler in the hot water mode is as follows:
Gas and electric systems in the starting position. We carry out the work on starting the boiler, the above before ignition of the ignition burner, set the maximum temperature +95 ^o С on the temperature controller 32 (Figs. 1, 4), apply power, turn on the switch 72 (Fig. 3) for connecting the boiler 40 (Fig. 3, 5), open the gas valve 30 (Figs. 1, 4), set the temperature of the temperature sensor relay 61 (Fig. 3) to the desired water temperature for domestic needs, while the contacts of the temperature sensor-relay 61 (Fig. 3) are closed , the relay 69 is activated (Fig. 3), the contacts 70 (Fig. 3) and 71 (Fig. 3) are closed, which close the electric circuit oklapana 35 (Figures 1, 3, 4), exhauster 37 (Fig. 3) and a circulation pump 48 (FIGS. 3, 5) of the boiler 40 (Figures 3, 5). The electrovalve 35 (Figs. 1, 3, 4) opens and gas flows through a pulse tube under the membrane of the main shutoff valve 29 (Figs. 1, 4), which opens and passes gas to the working burners 9 (Figs. 1, 2, 4 , 6), where it is ignited from the pilot burner 8 (Figs. 1, 2, 4), the coolant in the heat exchanger 6 (Figs. 1, 6) is heated and fed by the circulation pump 48 (Figs. 3, 5) to the heat exchanger of the boiler 40 (Figs. .3, 5), where water is heated for domestic needs. When the set temperature is reached, the relay relay 61 (Fig. 3) opens the contacts, de-energizes the relay 69 (Fig. 3), the contact opens Assortments 70 (FIG. 3) and 71 (3), which cut off the electromagnetic valve 35 (Figures 1, 3, 4), induced draft fan 37 (Figure 3), a circulation pump 48 (Figures 3, 5). The electrovalve 35 (Figs. 1, 3, 4) closes, the main shut-off valve 29 (Figs. 1, 4) closes, the flame on the working burners 9 (Figs. 1, 2, 4, 6) goes out.

Claims (2)

 1. A gas water heating boiler, containing a box casing, inside which there is a furnace, supply and return pipes of the coolant, a heating unit, which is a heat exchanger made of interconnected modules, a gas collector, an ignition and a working burner, a smoke collector, a chimney, a gas pipeline with valves and an automatic control and safety system equipped with control valves, one of which is an electromagnetic valve, characterized in that the working the torches are made of heat-resistant stainless steel with slotted grooves arranged in pairs in three rows in a checkerboard pattern, distributed along the width of the furnace so that they form a distribution grid with their bodies, the area of the slots of which is made with the possibility of creating a uniform temperature field throughout the volume of the furnace, the ignition burner is installed obliquely from below the working burners with a fire bridge extended on 1/3 of the fire surface of the working burners from the side of their nozzles, the heat exchanger modules are made of cast iron with a needle-shaped heating surface, they are interconnected by conical nipples in such a way that they form gas ducts with their side ribs, while in each module the side walls are interconnected by rods, the chimney is equipped with an adjustable draft stabilizer made in the form of a collar with the possibility of its movement in the axial direction and thus regulating the area of the annular gap between it and the cone of the traction stabilizer confuser and the rate of exhaust of flue gases, in addition, it is equipped with a manual control system I, and the aforementioned automatic control and safety system includes the following control and safety sensors: a pneumatic flame detector on the ignition burner, removed by means of a rod element from the high temperature zone, electric and pneumatic draft sensors, electric and pneumatic flame-through sensors to the nozzle exit of the working burners or when the flue is blocked inside the boiler, the main one installed on the pipe of the gas manifold of the working burners in front of the gas valve and equipped with th gas discharge pipe from under the large membrane, and additional shut-off valves, as well as a water temperature regulator and a start knob, which make up a single control unit with control and safety sensors, a thermostat that monitors the set air temperature in a heated room, which is connected through the mentioned system with an electromagnetic valve and an electric motor of the circulation pump of the heating system and a smoke exhauster, a manual valve for controlling the operation of the boiler according to the coolant temperature, a pressure relief valve heat carrier and bleeding air from the heating system when it is filled, mounted on a heat exchanger, while the solenoid valve is mounted on an impulse tube connecting the temperature controller and the main shut-off valve, and is circled in a parallel line with a manual valve for controlling the operation of the boiler according to the temperature of the heat carrier, and the casing of the heater equipped with thermal insulation, and the inner surface of the furnace is made with fireproof insulation.  2. The boiler according to claim 1, characterized in that it can be equipped with a boiler for hot water supply, as well as a software control unit for operation in the "Day-night" mode, while the electromagnetic valve can be connected to the boiler control system or to the aforementioned program block.

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